First Alert ZCOMBO User manual

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USER’S MANUAL
COMBINATION CARBON
MONOXIDE & SMOKE ALARM
IMPORTANT! PLEASE READ CAREFULLY AND SAVE.
This user’s manual contains important information about your Combination Carbon
Monoxide & Smoke Alarm’s operation. If you are installing this Alarm for use by
others, you must leave this manual— or a copy of it—with the end user.
Separate sensors to detect smoke and CO;
the two alarm systems work independently
Powered by two “AA” batteries
Side access drawer for easy battery replacement
Printed in Mexico
M08-0456-169793_1044807 K1 02/20
CONFORMS TO
UL STD 217 AND UL STD 2034 Model ZCOMBO
Sku 1044807
© 2020 BRK Brands, Inc. All rights reserved. •Distributed by BRK Brands, Inc.
Aurora, IL 60504 •BRK Brands, Inc. is a subsidiary of Newell Brands Inc. (NASDAQ: NWL)
Customer Service Team: [phone] •www.firstalert.com •www.brkelectronics.com
All First Alert®and BRK®Smoke Alarms conform to regulatory requirements,
including UL217 and are designed to detect particles of combustion. Smoke
particles of varying number and size are produced in all fires.
Ionization technology is generally more sensitive than photoelectric technology at
detecting small particles, which tend to be produced in greater amounts by flaming
fires, which consume combustible materials rapidly and spread quickly. Sources of
these fires may include paper burning in a wastebasket, or a grease fire in the kitchen.
Photoelectric technology is generally more sensitive than ionization technology
at detecting large particles, which tend to be produced in greater amounts
by smoldering fires, which may smolder for hours before bursting into flame.
Sources of these fires may include cigarettes burning in couches or bedding.
For maximum protection, use both types of Smoke Alarms on
each level and in every bedroom of your home.
INTRODUCTION
FIRE SAFETY TIPS
Follow safety rules and prevent hazardous situations: 1) Use smoking materials properly. Never
smoke in bed. 2) Keep matches or lighters away from children; 3) Store flammable materials in
proper containers; 4) Keep electrical appliances in good condition and don’t overload electrical
circuits; 5) Keep stoves, barbecue grills, fireplaces and chimneys grease- and debris-free; 6)
Never leave anything cooking on the stove unattended; 7) Keep portable heaters and open
flames, like candles, away from flammable materials; 8) Don’t let rubbish accumulate.
Keep alarms clean, and test them weekly. Replace alarms immediately if they are not working
properly. Smoke Alarms that do not work cannot alert you to a fire. Keep at least one working
fire extinguisher on every floor, and an additional one in the kitchen. Have fire escape ladders
or other reliable means of escape from an upper floor in case stairs are blocked.
BASIC SAFETY INFORMATION
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• Dangers, Warnings, and Cautions alert you to important operating instructions
or to potentially hazardous situations. Pay special attention to these items.
• This Smoke/CO Alarm is approved for use in single-family
residences. It is NOT designed for marine or RV use.
• This combination Smoke/Carbon Monoxide Alarm has two separate alarms. The CO
Alarm is not designed to detect fire or any other gas. It will only indicate the presence
of carbon monoxide gas at the sensor. Carbon monoxide gas may be present in
other areas. The Smoke Alarm will only indicate the presence of smoke that reaches
the sensor. The Smoke Alarm is not designed to sense gas, heat or flames.
• This Smoke/CO Alarm cannot operate without working batteries.
Removing the batteries for any reason, or failing to replace the batteries
at the end of their service life, removes your protection.
• NEVER ignore any alarm. See “If Your Smoke/CO Alarm Sounds” for more information
on how to respond to an alarm. Failure to respond can result in injury or death.
• The Silence Features are for your convenience only and will not correct a problem.
See “Using the Silence Features” for details. Always check your home for a
potential problem after any alarm. Failure to do so can result in injury or death.
• Test this Smoke/CO Alarm once a week. If the Alarm ever fails to test correctly, have it
replaced immediately! If the Alarm is not working properly, it cannot alert you to a problem.
• This product is intended for use in ordinary indoor locations of family living units.
It is not designed to measure CO levels in compliance with Occupational Safety
and Health Administration (OSHA) commercial or industrial standards. Individuals
with medical conditions that may make them more sensitive to carbon monoxide
may consider using warning devices which provide audible and visual signals
for carbon monoxide concentrations under 30 ppm. For additional information
on carbon monoxide and your medical condition contact your physician.
FCC COMPLIANCE
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that the interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that of the receiver.
• Consult the dealer or an experienced radio or TV technician for help.
Changes or modifications to the product, not expressly approved by First Alert /
BRK Brands, Inc., could void the user’s authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
INSTALLATION
WHERE TO INSTALL THIS ALARM
Minimum coverage for Smoke Alarms, as recommended by the National Fire Protection
Association (NFPA), is one Smoke Alarm on every floor, in every sleeping area, and in every bedroom
(See “Regulatory Information For Smoke Alarms” for details on the NFPA recommendations).
For CO Alarms, the National Fire Protection Association (NFPA) recommends that
a CO Alarm should be centrally located outside of each separate sleeping area in
the immediate vicinity of the bedrooms. For added protection, install additional
CO Alarms in each separate bedroom, and on every level of your home.
NOTE: For added protection, install an additional Smoke/CO Alarm at least 15 feet (4.6 meters)
away from the furnace or fuel burning heat source where possible. In smaller homes or in
manufactured homes where this distance cannot be maintained, install the Alarm as far away as
possible from the furnace or other fuel burning source. Installing the Alarm closer than 15 feet
(4.6 meters) will not harm the Alarm, but may increase the frequency of unwanted alarms.
To pair this ZCOMBO alarm to a Ring or other compatible Z-Wave network, download the
appropriate App and follow the instructions to Set up Device or Connect Device.
IN GENERAL, INSTALL COMBINATION SMOKE AND CARBON MONOXIDE ALARMS:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet (12 meters) long, install a unit at each end.
• At the top of first-to-second floor stairs.
• At the bottom of the basement stairs.
• For additional coverage, install Alarms in all rooms, halls, and storage areas, where
temperatures normally remain between 40˚ F and 100˚ F (4.4˚ C and 37.8˚ C).
RECOMMENDED PLACEMENT
SUGGESTED AREAS FOR INSTALLING 
SMOKE ALARMS, CO ALARMS, AND COMBO UNITS
SMOKE ALARM WITH 
SILENCE FEATURE
CO ALARMS
BOTH, OR COMBINATION 
SMOKE/CO ALARMS
SMOKE ALARMS
KEY:
Suggested locations are based on
NFPA recommendations (NFPA 72 
for Smoke Alarms and NFPA 720 for
Carbon Monoxide Alarms). Always 
refer to national and local codes 
before beginning any installation.
In new construction AC and AC/DC smoke alarms MUST
be interconnected to meet NFPA recommendations.

• When installing on the wall, the top edge of Smoke Alarms should be placed
between 4 inches (102 mm) and 12 inches (305 mm) from the wall/ceiling line.
• When installing on the ceiling, place the alarm as close to the center as possible.
• In either case, install at least 4 inches (102 mm) from where the wall and
ceiling meet. See “Avoiding Dead Air Spaces” for more information.
NOTE: For any location, make sure no door or other obstruction could
keep carbon monoxide or smoke from reaching the Alarm.
Installing Smoke/CO Alarms in Mobile Homes
For minimum security install one Smoke/CO Alarm as close to each sleeping area as possible.
For more security, put one unit in each room. Many older mobile homes (especially those built
before 1978) have little or no insulation. If your mobile home is not well insulated, or if you
are unsure of the amount of insulation, it is important to install units on inside walls only.
WHERE THIS ALARM SHOULD NOT BE INSTALLED
DO NOT LOCATE THIS SMOKE/CO ALARM:
• In garages, furnace rooms, crawl spaces and unfinished attics.
Avoid extremely dusty, dirty or greasy areas.
WHERE THIS ALARM SHOULD NOT BE INSTALLED - DO NOT
LOCATE THIS SMOKE/CO ALARM (CONTINUED)...
• Where combustion particles are produced. Combustion particles form when something burns.
Areas to avoid include poorly ventilated kitchens, garages, and furnace rooms. Keep units at
least 20 feet (6 meters) from the sources of combustion particles (stove, furnace, water heater,
space heater) if possible. In areas where a 20-foot (6 meter) distance is not possible – in
modular, mobile, or smaller homes, for example – it is recommended the Smoke Alarm be
placed as far from these fuel-burning sources as possible. The placement recommendations
are intended to keep these Alarms at a reasonable distance from a fuel-burning source,
and thus reduce “unwanted” alarms. Unwanted alarms can occur if a Smoke Alarm is
placed directly next to a fuel-burning source. Ventilate these areas as much as possible.
• Within 5 feet (1.5 meters) of any cooking appliance. In air streams near kitchens. Air
currents can draw cooking smoke into the smoke sensor and cause unwanted alarms.
• In extremely humid areas. This Alarm should be at least 10 feet (3 meters) from a shower, sauna,
humidifier, vaporizer, dishwasher, laundry room, utility room, or other source of high humidity.
• In direct sunlight.
• In turbulent air, like near ceiling fans or open windows. Blowing air
may prevent CO or smoke from reaching the sensors.
• In areas where temperature is colder than 40˚ F (4.4˚ C) or hotter than 100˚F
(37.8˚ C). These areas include non-airconditioned crawl spaces, unfinished
attics, uninsulated or poorly insulated ceilings, porches, and garages.
• In insect infested areas. Insects can clog the openings to the sensing chamber.
• Less than 12 inches (305 mm) away from fluorescent lights.
Electrical “noise” can interfere with the sensor.
• In “dead air” spaces. See “Avoiding Dead Air Spaces”.
AVOIDING DEAD AIR SPACES
“Dead air” spaces may prevent smoke from reaching the Smoke/CO Alarm. To
avoid dead air spaces, follow installation recommendations below.
On ceilings, install Smoke/CO Alarms as close to the center of the ceiling as possible. If this is
not possible, install the Smoke/CO Alarm at least 4 inches (102 mm) from the wall or corner.
For wall mounting (if allowed by building codes), the top edge of Smoke/
CO Alarms should be placed between 4 inches (102 mm) and 12 inches (305
mm) from the wall/ceiling line, below typical “dead air” spaces.
On a peaked, gabled, or cathedral ceiling, install first Smoke/CO Alarm within 3
feet (0.9 meters) of the peak of the ceiling, measured horizontally. Additional Smoke/
CO Alarms may be required depending on the length, angle, etc. of the ceiling’s slope.
Refer to NFPA 72 for details on requirements for sloped or peaked ceilings.
WEEKLY TESTING
• NEVER use an open flame of any kind to test this unit. You might accidentally damage
or set fire to the unit or to your home. The built-in test switch accurately tests the
unit’s operation as required by Underwriters Laboratories, Inc. (UL). NEVER use
vehicle exhaust! Exhaust may cause permanent damage and voids your warranty.
• DO NOT stand close to the Alarm when the horn is sounding. Exposure at close range
may be harmful to your hearing. When testing, step away when horn starts sounding.
It is important to test this unit every week to make sure it is working properly.
Using the test button is the recommended way to test this Smoke/CO Alarm.
You can test this Smoke/CO Alarm: Press and hold the Test/
Silence button 3-5 seconds until unit starts to alarm.
During testing, you will see and hear the following sequence:
• The Horn will sound 3 beeps, pause, 3 beeps. The Power/
Smoke LED flashes Red and the CO LED will be Off.
• Next the Horn will sound 4 beeps, pause, 4 beeps. The Power/
Smoke LED will be Off and the CO LED flashes Red.
If the unit does not alarm, make sure the batteries are correctly installed,
and test again. If the unit still does not alarm, replace it immediately.
HOW TO INSTALL THIS ALARM
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This combination Smoke/CO Alarm was designed to be mounted on the ceiling
or wall. It is not a tabletop device. You must install this device on the ceiling or
wall as outlined below. Read “Where To Install This Alarm” before starting.
Tools you will need: pencil, drill with 3/16” or 5mm drill bit, flathead screwdriver, hammer.
PARTS OF THIS SMOKE/CO ALARM
1. Test/Silence Button
2. Battery Compartment
3. Power/Smoke Alarm LED
4. CO Alarm LED
• Do not connect this unit to any other alarm or auxiliary device. It is a
single-station unit that cannot be linked to other devices. Connecting
anything else to this unit may prevent it from working properly.
• Do not install this unit over an electrical junction box. Air currents around junction
boxes can prevent smoke from reaching the sensing chamber and prevent the unit from
alarming. Only AC powered units are intended for installation over junction boxes.
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If you want to lock the battery compartment, or lock the Smoke/CO Alarm to the mounting
bracket, please read the “Optional Locking Features” section located at www.firstalert.com.
1. Hold base firmly and twist the mounting bracket
counterclockwise (left) to separate it from the unit.
2. Hold the mounting bracket against the ceiling (or wall) so the vertical
mounting slot is aligned in the 12 o’clock position and trace around the
inside of the mounting slots (vertical and horizontal mounting).
3. Put the unit where it won’t get covered with dust when you drill the mounting holes.
4. Using a 3/16” (5 mm) drill bit, drill a hole through the center of the oval outlines you traced.
5. Insert the plastic screw anchors (in the plastic bag with screws) into the holes. Tap the screw
anchors gently with a hammer, if necessary, until they are flush with the ceiling or wall.
6. Line the mounting bracket up over the plastic screw anchors.
7. Screw the mounting bracket to the ceiling or wall through the
mounting slots using the two screws provided.
8. Before attaching the Alarm to the
bracket, insert the two (2) AA batteries
(included) into the battery compartment.
Match the terminals on the end of the
battery with the terminals on the unit.
Match “+” to “+” and “-” to “-.” If the
batteries are not fully inserted, the
unit cannot receive battery power.
NOTE: The unit may beep briefly
when you install the batteries. This
is normal. The GREEN Light flashes
about every 60 seconds when the
unit is receiving battery power.
The battery door will resist closing unless batteries are installed.
This warns you the unit will not operate without batteries.
9. Attach the Smoke/CO Alarm to the mounting
bracket. Line up the guides on the alarm’s
base with the guides on the mounting bracket.
When guides are lined up, turn the base
clockwise (right) until it snaps into place.
NOTE: Once the Smoke/CO Alarm is snapped
onto the mounting bracket, you can rotate the
Smoke/CO Alarm to adjust the alignment.
10. Test the Smoke/CO Alarm. See
“Weekly Testing” for details.
OTHER Z-WAVE SYSTEMS
This product can be operated in any Z-Wave network with other Z-Wave certified devices
from other manufacturers. All non-battery operated nodes within the network will act
as repeaters regardless of the vendor to increase the reliability of the network.
ADD
1. Slide battery door open.
2. Insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
REMOVE
1. Slide battery door open.
2. Remove and re-insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
• The alarm will remain awake for 30 seconds on inclusion.
RESET DEVICE
If the device is powered up with the test button held down for 10+ seconds, the device will reset all
Z-Wave settings and leave the network.
Upon completion of the Reset operation, the LED will glow and the horn will sound for ~1 second.
Please use this procedure only when the network primary controller is missing or
otherwise inoperable.
NOTE: The device will not remain awake after resetting and will go into standby mode.
PROCEDURE TO MANUALLY WAKE-UP THE DEVICE
To manual wake-up the device, slide the battery door open wait for ~5 seconds and then slide
the battery drawer closed. Upon power-up, the device will send the wake-up notification.
DSK LOCATION ON THE PRODUCT
The QR code and the 5-digit DSK pin can be found on the product nameplate which is located on
the back of the product. The Full DSK string can be found on the product insert, available inside the
product packaging.
For more information on Z-Wave specifications, visit www.firstalert.com/zwaveinfo.
REGULAR MAINTENANCE
This unit has been designed to be as maintenance-free as possible, but there
are a few simple things you must do to keep it working properly.
• Test it at least once a week.
• Clean the Smoke/CO Alarm at least once a month; gently vacuum the outside of the Smoke/CO
Alarm using your household vacuum’s soft brush attachment. A can of clean compressed air (sold
at computer or office supply stores) may also be used. Follow manufacturer instructions for use.
Test the Smoke/CO Alarm. Never use water, cleaners or solvents since they may damage the unit.
• If the Smoke/CO Alarm becomes contaminated by excessive dirt, dust and/or grime,
and cannot be cleaned to avoid unwanted alarms, replace the unit immediately.
• Relocate the unit if it sounds frequent unwanted alarms. See
“Where This Alarm Should Not Be Installed” for details.
Choosing a replacement battery:
Your Smoke/CO Alarm requires two standard AA batteries. The following batteries are acceptable as
replacements: Energizer E91, Duracell MN1500/LR6. These batteries are available at many local
retail stores.
• Always use the exact batteries specified by this User’s Manual. DO NOT use
rechargeable batteries. Clean the battery contacts and also those of the device prior
to battery installation. Install batteries correctly with regard to polarity (+ and -).
• Please dispose of or recycle used batteries properly, following any local
regulations. Consult your local waste management authority or recycling
organization to find an electronics recycling facility in your area. DO NOT
DISPOSE OF BATTERIES IN FIRE. BATTERIES MAY EXPLODE OR LEAK.
• Constant exposure to high or low temperatures or high humidity may reduce battery life.
• Keep battery out of reach of children. In the event a battery is swallowed,
immediately contact your poison control center, your physician, or the National
Battery Ingestion hotline at 202-625-3333 as serious injury may occur.
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Actual battery service life depends on the Smoke/CO Alarm and the environment in which
it is installed. All the batteries specified above are acceptable replacement batteries for
this unit. Regardless of the manufacturer’s suggested battery life, you MUST replace
the battery immediately once the unit starts “chirping” (the “low battery warning”).
To replace the batteries (without removing
Alarm from the ceiling or wall):
1. Open the battery compartment.
2. Press tabs A and B as shown in the
diagram and remove each battery.
3. Insert the new batteries, making sure they
snap completely into the battery compartment.
Match the terminals on the ends of the
batteries with the terminals on the unit.
4. Close the battery compartment, and then test
the unit by pressing the Test/Silence button.
AB
IF YOUR SMOKE/CO ALARM SOUNDS
WHAT TO DO FIRST–IDENTIFY THE TYPE OF ALARM
Type of Alarm What You See and Hear
Carbon Monoxide (CO)
CO LED: Flashes Red
Horn: 4 beeps, pause, 4 beeps, pause
Power/Smoke LED: Off
Smoke
Power/Smoke LED: Flashes Red
Horn: 3 beeps, pause, 3 beeps, pause
CO LED: Off
IF THE CO ALARM SOUNDS
“ALARM-MOVE TO FRESH AIR”
If you hear the CO alarm horn and the CO red light is flashing, move
everyone to a source of fresh air. DO NOT remove the batteries!
Actuation of your CO Alarm indicates the presence of carbon monoxide (CO) which
can kill you. In other words, when your CO Alarm sounds, you must not ignore it!
IF THE CO ALARM SIGNAL SOUNDS:
1. Operate the Test/Silence button.
2. Call your emergency services, fire department or 911. Write down
the number of your local emergency service here:
__________________________________________________________________
3. Immediately move to fresh air—outdoors or by an open door or window. Do a head count
to check that all persons are accounted for. Do not re-enter the premises, or move away
from the open door or window until the emergency services responder has arrived, the
premises have been aired out, and your CO Alarm remains in its normal condition.
4. After following steps 1-3, if your CO Alarm reactivates within a 24-hour period, repeat steps
1-3 and call a qualified appliance technician to investigate for sources of CO from fuel-burning
equipment and appliances, and inspect for proper operation of this equipment. If problems are
identified during this inspection have the equipment serviced immediately. Note any combustion
equipment not inspected by the technician, and consult the manufacturers’ instructions, or
contact the manufacturers directly, for more information about CO safety and this equipment.
Make sure that motor vehicles are not, and have not, been operating in an attached garage or
adjacent to the residence. Write down the number of a qualified appliance technician here:
__________________________________________________________________
NOTE: A qualified appliance technician is defined as “a person, firm, corporation, or company that
either in person or through a representative, is engaged in and responsible for the installation, testing,
servicing, or replacement of heating, ventilation, air conditioning (HVAC) equipment, combustion
appliances and equipment, and/or gas fireplaces or other decorative combustion equipment.”
IF THE SMOKE ALARM SOUNDS
RESPONDING TO AN ALARM
• If the unit alarms and you are not testing the unit, it is warning you of a
potentially dangerous situation that requires your immediate attention. NEVER
ignore any alarm. Ignoring the alarm may result in injury or death.
• Never remove the batteries from a battery operated Smoke/CO Alarm to stop an
unwanted alarm (caused by cooking smoke, etc.). Removing batteries disables
the alarm so it cannot sense smoke, and removes your protection. Instead open a
window or fan the smoke away from the unit. The alarm will reset automatically.
• If the unit alarms get everyone out of the house immediately.
WHAT TO DO IN CASE OF FIRE
Don’t panic; stay calm. Follow your family escape plan.
Get out of the house as quickly as possible. Don’t stop to get dressed or collect anything.
Feel doors with the back of your hand before opening them. If a door is cool, open it slowly.
Don’t open a hot door. Keep doors and windows closed, unless you must escape through them.
Cover your nose and mouth with a cloth (preferably damp). Take short, shallow breaths.
Meet at your planned meeting place outside your home, and do a
head count to make sure everybody got out safely.
Call the Fire Department as soon as possible from outside. Give your address, then your name.
Never go back inside a burning building for any reason.
Contact your Fire Department for ideas on making your home safer.
Alarms have various limitations. See “General Limitations of Smoke/CO Alarms” for details.
USING THE SILENCE FEATURES
Never remove the batteries to quiet an unwanted alarm. Removing the
batteries disables the alarm and removes your protection.
The Silence Feature is intended to temporarily silence the horn while you
identify and correct the problem. Do not use the Silence Feature in emergency
situations. It will not correct a CO problem or extinguish a fire.
The Silence Feature can temporarily quiet an unwanted alarm for several minutes.
Press the Test/Silence button on the alarm cover for at least 3-5 seconds.
After the Test/Silence button is released, the Red LED blinks during the silence mode.
When the Smoke Alarm is Silenced When the CO Alarm is Silenced
The Smoke Alarm will remain silent for up to
15 minutes, then return to normal operation.
If the smoke has not cleared–or continues to
increase–the device will go back into alarm.
The CO alarm will remain silent
for up to 4 minutes.
After 4 minutes, if CO levels remain potentially
dangerous the horn will start sounding again.
SILENCING THE LOW BATTERY WARNING
This silence feature can temporarily quiet the low battery warning “chirp” for
up to 8 hours. Press the Test/Silence button on the alarm cover.
Once the low battery warning “chirp” silence feature is activated, the unit continues to flash the
Green light once a minute for 8 hours. After 8 hours, the low battery “chirp” will resume. Replace
the batteries as soon as possible; this unit will not operate without battery power!
To deactivate this feature: Press the Test/Silence button again. The unit will go into Test Mode
and the low battery warning will resume (LED flashes and unit sounds “chirp” once a minute).
SILENCING THE END OF LIFE SIGNAL
This silence feature can temporarily quiet the End of Life warning “chirp” for up to 2 days.
You can silence the End of Life warning “chirp” by pressing the Test/Silence button. The
horn will chirp, acknowledging that the End of Life silence feature has been activated.
After approximately 2 days, the End of Life “chirp” will resume.
WHAT YOU NEED TO KNOW ABOUT CO
WHAT IS CO?
CO is an invisible, odorless, tasteless gas produced when fossil fuels do not burn completely,
or are exposed to heat (usually fire). Electrical appliances typically do not produce CO.
These fuels include: Wood, coal, charcoal, oil, natural gas, gasoline, kerosene, and propane.
Common appliances are often sources of CO. If they are not properly maintained,
are improperly ventilated, or malfunction, CO levels can rise quickly. CO is a real
danger now that homes are more energy efficient. “Air-tight” homes with added
insulation, sealed windows, and other weatherproofing can “trap” CO inside.
SYMPTOMS OF CO POISONING
These symptoms are related to CO POISONING and should
be discussed with ALL household members.
Mild Exposure: Slight headache, nausea, vomiting, fatigue (“flu-like” symptoms).
Medium Exposure: Throbbing headache, drowsiness, confusion, fast heart rate.
Extreme Exposure: Convulsions, unconsciousness, heart and lung failure.
Exposure to Carbon Monoxide can cause brain damage, death.
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This CO Alarm measures exposure to CO over time. It alarms if CO levels are extremely
high in a short period of time, or if CO levels reach a certain minimum over a long period of
time. The CO Alarm generally sounds an alarm before the onset of symptoms in average,
healthy adults. Why is this important? Because you need to be warned of a potential CO
problem while you can still react in time. In many reported cases of CO exposure, victims
may be aware that they are not feeling well, but become disoriented and can no longer
react well enough to exit the building or get help. Also, young children and pets may be the
first affected. The average healthy adult might not feel any symptoms when the CO Alarm
sounds. However, people with cardiac or respiratory problems, infants, unborn babies,
pregnant mothers, or elderly people can be more quickly and severely affected by CO. If
you experience even mild symptoms of CO poisoning, consult your doctor immediately!
FINDING THE SOURCE OF CO AFTER AN ALARM
Carbon monoxide is an odorless, invisible gas, which often makes it difficult to locate the source of
CO after an alarm. These are a few of the factors that can make it difficult to locate sources of CO:
• House well ventilated before the investigator arrives.
• Problem caused by “backdrafting.”
• Transient CO problem caused by special circumstances.
Because CO may dissipate by the time an investigator arrives, it may be
difficult to locate the source of CO. BRK Brands, Inc. shall not be obligated
to pay for any carbon monoxide investigation or service call.
POTENTIAL SOURCES OF CO IN THE HOME
Fuel-burning appliances like: portable
heater, gas or wood burning fireplace, gas
kitchen range or cooktop, gas clothes dryer.
Damaged or insufficient venting:
corroded or disconnected water heater
vent pipe, leaking chimney pipe or flue,
or cracked heat exchanger, blocked
or clogged chimney opening.
Improper use of appliance/
device: operating a barbecue grill
or vehicle in an enclosed area (like
a garage or screened porch).
Transient CO Problems: “transient”
or on-again-off-again CO problems
can be caused by outdoor conditions
and other special circumstances.
The following conditions can result in transient CO situations:
1. Excessive spillage or reverse venting of fuel appliances caused by outdoor conditions such as:
• Wind direction and/or velocity, including high, gusty winds. Heavy air in the
vent pipes (cold/humid air with extended periods between cycles).
• Negative pressure differential resulting from the use of exhaust fans.
• Several appliances running at the same time competing for limited fresh air.
• Vent pipe connections vibrating loose from clothes dryers, furnaces, or water heaters.
• Obstructions in or unconventional vent pipe designs which can amplify the above situations.
2. Extended operation of unvented fuel burning devices (range, oven, fireplace).
3. Temperature inversions, which can trap exhaust close to the ground.
4. Car idling in an open or closed attached garage, or near a home.
These conditions are dangerous because they can trap exhaust in your home. Since these
conditions can come and go, they are also hard to recreate during a CO investigation.
HOW CAN I PROTECT MY FAMILY
FROM CO POISONING?
A CO Alarm is an excellent means of protection. It monitors the air and sounds a loud
alarm before Carbon Monoxide levels become threatening for average, healthy adults.
A CO Alarm is not a substitute for proper maintenance of home appliances.
To help prevent CO problems and reduce the risk of CO poisoning:
• Clean chimneys and flues yearly. Keep them free of debris, leaves, and nests for
proper air flow. Also, have a professional check for rust and corrosion, cracks,
or separations. These conditions can prevent proper air movement and cause
backdrafting. Never “cap” or cover a chimney in any way that would block air flow.
• Test and maintain all fuel-burning equipment annually. Many local gas or oil
companies and HVAC companies offer appliance inspections for a nominal fee.
• Make regular visual inspections of all fuel-burning appliances. Check appliances for
excessive rust and scaling. Also check the flame on the burner and pilot lights. The
flame should be blue. A yellow flame means fuel is not being burned completely and CO
may be present. Keep the blower door on the furnace closed. Use vents or fans when
they are available on all fuel-burning appliances. Make sure appliances are vented to
the outside. Do not grill or barbecue indoors, or in garages or on screen porches.
• Check for exhaust backflow from CO sources. Check the draft hood on an operating
furnace for a backdraft. Look for cracks on furnace heat exchangers.
• Check the house or garage on the other side of shared wall.
• Keep windows and doors open slightly. If you suspect that CO is escaping into your home,
open a window or a door. Opening windows and doors can significantly decrease CO levels.
In addition, familiarize yourself with all enclosed materials. Read this manual in its
entirety, and make sure you understand what to do if your CO Alarm sounds.
REGULATORY INFORMATION FOR SMOKE/CO ALARMS
REGULATORY INFORMATION FOR CO ALARMS
WHAT LEVELS OF CO CAUSE AN ALARM?
Underwriters Laboratories Inc. Standard UL2034 requires residential CO Alarms
to sound when exposed to levels of CO and exposure times as described below.
They are measured in parts per million (ppm) of CO over time (in minutes).
UL2034 Required Alarm Points*:
• If the alarm is exposed to 400 ppm of CO, IT MUST ALARM BETWEEN 4 and 15 MINUTES.
• If the alarm is exposed to 150 ppm of CO, IT MUST ALARM BETWEEN 10 and 50 MINUTES.
• If the alarm is exposed to 70 ppm if CO, IT MUST ALARM BETWEEN 60 and 240 MINUTES.
*Approximately 10% COHb exposure at levels of 10% to 95% Relative Humidity (RH).
The unit is designed not to alarm when exposed to a constant level of 30 ppm for 30 days.
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CO Alarms are designed to alarm before there is an immediate life threat.
Since you cannot see or smell CO, never assume it’s not present.
• An exposure to 100 ppm of CO for 20 minutes may not affect average, healthy
adults, but after 4 hours the same level may cause headaches.
• An exposure to 400 ppm of CO may cause headaches in average, healthy
adults after 35 minutes, but can cause death after 2 hours.
Standards: Underwriters Laboratories Inc. Single and Multiple
Station carbon monoxide alarms UL2034.
According to Underwriters Laboratories Inc. UL2034, Section 1-1.2: “Carbon monoxide alarms
covered by these requirements are intended to respond to the presence of carbon monoxide from
sources such as, but not limited to, exhaust from internal-combustion engines, abnormal operation
of fuel-fired appliances, and fireplaces. CO Alarms are intended to alarm at carbon monoxide
levels below those that could cause a loss of ability to react to the dangers of Carbon Monoxide
exposure.” This CO Alarm monitors the air at the Alarm, and is designed to alarm before CO levels
become life threatening. This allows you precious time to leave the house and correct the problem.
This is only possible if Alarms are located, installed, and maintained as described in this manual.
Gas Detection at Typical Temperature and Humidity Ranges: The CO Alarm is not formulated
to detect CO levels below 30 ppm typically. UL tested for false alarm resistance to Methane (500
ppm), Butane (300 ppm), Heptane (500 ppm), Ethyl Acetate (200 ppm), Isopropyl Alcohol (200 ppm)
and Carbon Dioxide (5000 ppm). Values measure gas and vapor concentrations in parts per million.
Audible Alarm: 85 dB minimum at 10 feet (3 meters).
Printed in Mexico M08-0456-169793_1044807 K1 02/20
REGULATORY INFORMATION FOR SMOKE ALARMS
RECOMMENDED LOCATIONS FOR SMOKE ALARMS
Installing Smoke Alarms in Single-Family Residences
The National Fire Protection Association (NFPA), recommends one Smoke Alarm on every floor,
in every sleeping area, and in every bedroom. In new construction, the Smoke Alarms must be
AC powered and interconnected. See “Agency Placement Recommendations” for details.
For additional coverage, it is recommended that you install a Smoke Alarm in all
rooms, halls, storage areas, finished attics, and basements, where temperatures
normally remain between 40˚ F (4.4˚ C) and 100˚ F (37.8˚ C). Make sure no door or
other obstruction could keep smoke from reaching the Smoke Alarms.
More specifically, install Smoke Alarms:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet long (12 meters), install a unit at each end.
• At the top of the first-to-second floor stairway, and at the bottom of the basement stairway.
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Specific requirements for Smoke Alarm installation vary from state to state and from region to region.
Check with your local Fire Department for current requirements in your area. It is recommended AC
or AC/DC units be interconnected for added protection.
AGENCY PLACEMENT RECOMMENDATIONS
Standards: Underwriters Laboratories Inc. Single and Multiple Station Smoke Alarms 217.
NFPA 72 Chapter 29
“For your information, the National Fire Alarm and Signaling Code, NFPA 72, reads as follows:”
29.5.1* Required Detection.
29.5.1.1* Where required by other governing laws, codes, or standards for a specific type of
occupancy, approved single and multiple-station smoke alarms shall be installed as follows:
(1) *In all sleeping rooms and guest rooms
(2) *Outside of each separate dwelling unit sleeping area, within 21 ft (6.4 m) of any
door to a sleeping room, with the distance measured along a path of travel
(3) On every level of a dwelling unit, including basements
(4) On every level of a residential board and care occupancy (small facility),
including basements and excluding crawl spaces and unfinished attics
(5) *In the living area(s) of a guest suite
(6) In the living area(s) of a residential board and care occupancy (small facility)
(Reprinted with permission from NFPA 72®, National Fire Alarm and Signaling Code Copyright © 2010
National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the complete
and official position of the National Fire Protection Association, on the referenced subject which is
represented only by the standard in its entirety), (National Fire Alarm and Signaling Code®and NFPA
72®are registered trademarks of the National Fire Protection Association, Inc., Quincy, MA 02269).
California State Fire Marshal (CSFM)
Early warning detection is best achieved by the installation of fire detection equipment
in all rooms and areas of the household as follows: A Smoke Alarm installed in each
separate sleeping area (in the vicinity, but outside bedrooms), and Heat or Smoke Alarms
in the living rooms, dining rooms, bedrooms, kitchens, hallways, finished attics, furnace
rooms, closets, utility and storage rooms, basements, and attached garages.
ABOUT SMOKE ALARMS
Battery (DC) operated Smoke Alarms: Provide protection even when
electricity fails, provided the batteries are fresh and correctly installed. Units
are easy to install, and do not require professional installation.
AC powered Smoke Alarms: Can be interconnected so if one unit senses smoke,
all units alarm. They do not operate if electricity fails. AC with battery (DC) back-
up: will operate if electricity fails, provided the batteries are fresh and correctly
installed. AC and AC/DC units must be installed by a qualified electrician.
Smoke/CO Alarms for Solar or Wind Energy users and battery backup power systems:
AC powered Smoke/CO Alarms should only be operated with true or pure sine wave inverters.
Operating this Alarm with most battery-powered UPS (uninterruptible power supply) products
or square wave or “quasi sine wave” inverters will damage the Alarm. If you are not sure
about your inverter or UPS type, please consult with the manufacturer to verify.
Smoke Alarms for the hearing impaired: Special purpose Smoke Alarms should
be installed for the hearing impaired. They include a visual alarm and an audible
alarm horn, and meet the requirements of the Americans With Disabilities Act.
Can be interconnected so if one unit senses smoke, all units alarm.
ABOUT SMOKE ALARMS (CONTINUED)...
Smoke alarms are not to be used with detector guards unless the
combination has been evaluated and found suitable for that purpose.
All these Smoke Alarms are designed to provide early warning of fires if located, installed and
cared for as described in the user’s manual, and if smoke reaches the Alarm. If you are unsure
which type of Smoke Alarm to install, refer the National Fire Protection Association (NFPA)
Standard 72 (National Fire Alarm and Signaling Code) and NFPA 101 (Life Safety Code). National
Fire Protection Association, One Batterymarch Park, Quincy, MA 02269-9101. Local building
codes may also require specific units in new construction or in different areas of the home.
SPECIAL COMPLIANCE CONSIDERATIONS
This Smoke Alarm is suitable for use in apartments, condominiums, townhouses, hospitals, day
care facilities, health care facilities, boarding houses, group homes and dormitories provided
a primary fire detection system already exists to meet fire detection requirements in common
areas like lobbies, hallways, or porches. Using this Smoke Alarm in common areas may not
provide sufficient warning to all residents or meet local fire protection ordinances/regulations.
This Smoke Alarm alone is not a suitable substitute for complete fire detection systems
in places housing many people—like apartment buildings, condominiums, hotels, motels,
dormitories, hospitals, health care facilities, nursing homes, day care facilities, or group homes
of any kind. It is not a suitable substitute for complete fire detection systems in warehouses,
industrial facilities, commercial buildings, and special-purpose non-residential buildings which
require special fire detection and alarm systems. Depending on the building codes in your
area, this Smoke Alarm may be used to provide additional protection in these facilities.
In new construction, most building codes require the use of AC or AC/DC powered Smoke
Alarms only. In existing construction, AC, AC/DC, or DC powered Smoke Alarms can be used
as specified by local building codes. Refer to NFPA 72 (National Fire Alarm and Signaling
Code) and NFPA 101 (Life Safety Code), local building codes, or consult your Fire Department
for detailed fire protection requirements in buildings not defined as “households”.
HUD MAP PROGRAM
Certain HUD battery powered Smoke Alarm applications, especially those that fall under
HUD 223(f) MAP (Multi-family Accelerated Processing), may require a 10 Year sealed tamper
resistant battery. This alarm does not meet that requirement. Substitute First Alert SA340B.
GENERAL LIMITATIONS OF SMOKE/CO ALARMS
This Smoke/CO Alarm is intended for residential use. It is not intended for use in industrial
applications where Occupational Safety and Health Administration (OSHA) requirements for
Carbon Monoxide Alarms must be met. The Smoke Alarm portion of this device is not intended
to alert hearing impaired residents. Special purpose Smoke Alarms should be installed for
hearing impaired residents (CO Alarms are not yet available for the hearing impaired).
Smoke/CO Alarms may not waken all individuals. Practice the escape plan at least twice a year,
making sure that everyone is involved – from kids to grand- parents. Allow children to master fire
escape planning and practice before holding a fire drill at night when they are sleeping. If children
or others do not readily waken to the sound of the Smoke/CO Alarm, or if there are infants or
family members with mobility limitations, make sure that someone is assigned to assist them in
fire drill and in the event of an emergency. It is recommended that you hold a fire drill while family
members are sleeping in order to determine their response to the sound of the Smoke/CO Alarm
while sleeping and to determine whether they may need assistance in the event of an emergency.
Smoke/CO Alarms cannot work without power. Battery operated units cannot work if the batteries
are missing, disconnected or dead, if the wrong type of batteries are used, or if the batteries are not
installed correctly. AC units cannot work if the AC power is cut off for any reason (open fuse or circuit
breaker, failure along a power line or at a power station, electrical fire that burns the electrical wires,
etc.). If you are concerned about the limitations of battery or AC power, install both types of units.
This Smoke/CO Alarm will not sense smoke or CO that does not reach the sensors. It will
only sense smoke or CO at the sensor. Smoke or CO may be present in other areas. Doors or other
obstructions may affect the rate at which CO or smoke reaches the sensors. If bedroom doors are
usually closed at night, we recommend you install an alarm device (Combination CO and Smoke
Alarm, or separate CO Alarms and Smoke Alarms) in each bedroom and in the hallway between them.
This Smoke/CO Alarm may not sense smoke or CO on another level of the home. Example:
This alarm device, installed on the second floor, may not sense smoke or CO in the basement.
For this reason, one alarm device may not give adequate early warning. Recommended minimum
protection is one alarm device in every sleeping area, every bedroom, and on every level of your
home. Some experts recommend battery powered Smoke and CO Alarms be used in conjunction
with interconnected AC powered Smoke Alarms. For details, see “About Smoke Alarms” for details.
Smoke/CO Alarms may not be heard. The alarm horn loudness meets or exceeds current
UL standards of 85 dB at 10 feet (3 meters). However, if the Smoke/CO Alarm is installed
outside the bedroom, it may not wake up a sound sleeper or one who has recently used
drugs or has been drinking alcoholic beverages. This is especially true if the door is closed
or only partly open. Even persons who are awake may not hear the alarm horn if the sound
is blocked by distance or closed doors. Noise from traffic, stereo, radio, television, air
conditioner, or other appliances may also prevent alert persons from hearing the alarm
horn. This Smoke/CO Alarm is not intended for people who are hearing impaired.
The Alarm may not have time to alarm before the fire itself causes damage,
injury, or death, since smoke from some fires may not reach the unit
immediately. Examples of this include persons smoking in bed, children playing with
matches, or fires caused by violent explosions resulting from escaping gas.
This Smoke/CO Alarm is not a substitute for life insurance. Though this Smoke/CO Alarm
warns against increasing CO levels or the presence of smoke, BRK Brands, Inc. does not warrant or
imply in any way that they will protect lives. Homeowners and renters must still insure their lives.
This Smoke/CO Alarm has a limited life. Although this Smoke/CO Alarm and all
of its parts have passed many stringent tests and are designed to be as reliable as
possible, any of these parts could fail at any time. Therefore, you must test this device
weekly. The unit should be replaced immediately if it is not operating properly.
This Smoke/CO Alarm is not foolproof. Like all other electronic devices, this Smoke/CO Alarm
has limitations. It can only detect smoke or CO that reaches the sensors. It may not give early
warning of the source of smoke or CO is in a remote part of the home, away from the alarm device.
Z-Wave Mesh Network Limitations 1. Alarms are single stationed Alarms and are
not interconnected to each other. 2. Only initiating Alarms will sound. 3. Z-Wave
system is not listed as a life safety system. Mesh network system only provides
supplemental notifications and should not be counted on for life safety.
TROUBLESHOOTING GUIDE
IF THE ALARM... PROBLEM... YOU SHOULD...
Horn “chirps” and LED flashes GREEN about once per minute. Low battery warning. Install two new AA batteries*.
Horn “chirps” 3 times every minute; LED
flashes GREEN 3 rapid flashes.
MALFUNCTION SIGNAL. Device is not working
properly, and needs to be replaced.
Units under warranty should be returned to manufacturer
for replacement. See “Limited Warranty” for details.
Horn “chirps” 5 times every minute; LED
flashes GREEN 5 rapid flashes. END OF LIFE SIGNAL. Alarm needs to be replaced. Immediately replace the Alarm.
Carbon Monoxide Alarm ONLY:
CO Alarm goes back into alarm 4 minutes after you Silence it. CO levels indicate a potentially dangerous situation.
IF YOU ARE FEELING SYMPTOMS OF CO POISONING,
EVACUATE your home and call 911 or the Fire Department.
Refer to “If The CO Alarm Sounds” for details.
CO Alarm sounds frequently even though no high
levels of CO are revealed in an investigation.
The CO Alarm may be improperly located. Refer
to “Where to Install This Alarm” for details.
Relocate your Alarm. If frequent alarms continue, have
home rechecked for potential CO problems. You may
be experiencing an intermittent CO problem.
Smoke Alarm ONLY:
Smoke Alarm sounds when no smoke is visible. Unwanted alarm may be caused by non-
emergency source like cooking smoke.
Silence Alarm using manual button; clean the Alarm’s
cover with a soft, clean cloth. If frequent unwanted alarms
continue, relocate your Alarm. Alarm may be too close to
a kitchen, cooking appliance, or steamy bathroom.
*For a list of acceptable replacement batteries, see “Regular Maintenance.”
If you have any questions that cannot be answered by reading this manual, call the Customer Service Team: 1-800-323-9005.
LIMITED WARRANTY
BRK Brands, Inc., (“BRK”) the maker of First Alert®brand and BRK®brand products, warrants that for a period of ten years from the date of purchase, this product will be free from defects in
material and workmanship. BRK, at its option, will repair or replace this product or any component of the product found to be defective during the warranty period. Replacement will be made with a
new or remanufactured product or component. If the product is no longer available, replacement may be made with a similar product of equal or greater value. This is your exclusive warranty.
This warranty is valid for the original retail purchaser from the date of initial retail purchase and is not transferable. Keep the original sales receipt. Proof of purchase is required to obtain warranty
performance. BRK dealers, service centers, or retail stores selling BRK products do not have the right to alter, modify or any way change the terms and conditions of this warranty.
This warranty does not cover normal wear of parts or damage resulting from any of the following: negligent use or misuse of the product, use on improper
voltage or current, use contrary to the operating instructions, disassembly, repair or alteration by anyone other than BRK or an authorized service center. Further,
the warranty does not cover Acts of God, such as fire, flood, hurricanes and tornadoes or any batteries that are included with this unit.
BRK shall not be liable for any incidental or consequential damages caused by the breach of any express or implied warranty. Except to the extent prohibited by applicable law,
any implied warranty of merchantability or fitness for a particular purpose is limited in duration to the duration of the above warranty. Some states, provinces or jurisdictions
do not allow the exclusion or limitation of incidental or consequential damages or limitations on how long an implied warranty lasts, so the above limitations or exclusion
may not apply to you. This warranty gives you specific legal rights, and you may also have other rights that vary from state to state or province to province.
How to Obtain Warranty Service
Service: If service is required, do not return the product to your retailer. In order to obtain warranty service, contact the Customer Service Team at
1-800-323-9005. To assist us in serving you, please have the model number and date of purchase available when calling.
For Warranty Service return to: 1301 Joe Battle, El Paso, TX 79936
Battery: BRK Brands, Inc. make no warranty, express or implied, written or oral, including that of merchantability or fitness for any particular purpose with respect to battery.
Visit www.firstalert.com for more information.
For your records, please record:
Date Purchased: ______________/_________________Month/Year
Where Purchased: ____________________________________________
Date Installed: ____________/____________Month/Year
Replace alarm 7 years after installation. Please write the date in the
space provided: __________/__________ Month/Year
The alarm will also provide an audible End-of-Life Signal approximately
7 years after installation to remind you to replace the unit.
The End-of-Life Signal can be silenced for up to 2 days. Do not unplug
the alarm or remove the batteries until you get replacement.
A copy of the manual can be found at www.firstalert.com/products.

123456
USER’S MANUAL
COMBINATION CARBON
MONOXIDE & SMOKE ALARM
IMPORTANT! PLEASE READ CAREFULLY AND SAVE.
This user’s manual contains important information about your Combination Carbon
Monoxide & Smoke Alarm’s operation. If you are installing this Alarm for use by
others, you must leave this manual— or a copy of it—with the end user.
Separate sensors to detect smoke and CO;
the two alarm systems work independently
Powered by two “AA” batteries
Side access drawer for easy battery replacement
Printed in Mexico
M08-0456-169793_1044807 K1 02/20
CONFORMS TO
UL STD 217 AND UL STD 2034 Model ZCOMBO
Sku 1044807
© 2020 BRK Brands, Inc. All rights reserved. •Distributed by BRK Brands, Inc.
Aurora, IL 60504 •BRK Brands, Inc. is a subsidiary of Newell Brands Inc. (NASDAQ: NWL)
Customer Service Team: [phone] •www.firstalert.com •www.brkelectronics.com
All First Alert®and BRK®Smoke Alarms conform to regulatory requirements,
including UL217 and are designed to detect particles of combustion. Smoke
particles of varying number and size are produced in all fires.
Ionization technology is generally more sensitive than photoelectric technology at
detecting small particles, which tend to be produced in greater amounts by flaming
fires, which consume combustible materials rapidly and spread quickly. Sources of
these fires may include paper burning in a wastebasket, or a grease fire in the kitchen.
Photoelectric technology is generally more sensitive than ionization technology
at detecting large particles, which tend to be produced in greater amounts
by smoldering fires, which may smolder for hours before bursting into flame.
Sources of these fires may include cigarettes burning in couches or bedding.
For maximum protection, use both types of Smoke Alarms on
each level and in every bedroom of your home.
INTRODUCTION
FIRE SAFETY TIPS
Follow safety rules and prevent hazardous situations: 1) Use smoking materials properly. Never
smoke in bed. 2) Keep matches or lighters away from children; 3) Store flammable materials in
proper containers; 4) Keep electrical appliances in good condition and don’t overload electrical
circuits; 5) Keep stoves, barbecue grills, fireplaces and chimneys grease- and debris-free; 6)
Never leave anything cooking on the stove unattended; 7) Keep portable heaters and open
flames, like candles, away from flammable materials; 8) Don’t let rubbish accumulate.
Keep alarms clean, and test them weekly. Replace alarms immediately if they are not working
properly. Smoke Alarms that do not work cannot alert you to a fire. Keep at least one working
fire extinguisher on every floor, and an additional one in the kitchen. Have fire escape ladders
or other reliable means of escape from an upper floor in case stairs are blocked.
BASIC SAFETY INFORMATION
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• Dangers, Warnings, and Cautions alert you to important operating instructions
or to potentially hazardous situations. Pay special attention to these items.
• This Smoke/CO Alarm is approved for use in single-family
residences. It is NOT designed for marine or RV use.
• This combination Smoke/Carbon Monoxide Alarm has two separate alarms. The CO
Alarm is not designed to detect fire or any other gas. It will only indicate the presence
of carbon monoxide gas at the sensor. Carbon monoxide gas may be present in
other areas. The Smoke Alarm will only indicate the presence of smoke that reaches
the sensor. The Smoke Alarm is not designed to sense gas, heat or flames.
• This Smoke/CO Alarm cannot operate without working batteries.
Removing the batteries for any reason, or failing to replace the batteries
at the end of their service life, removes your protection.
• NEVER ignore any alarm. See “If Your Smoke/CO Alarm Sounds” for more information
on how to respond to an alarm. Failure to respond can result in injury or death.
• The Silence Features are for your convenience only and will not correct a problem.
See “Using the Silence Features” for details. Always check your home for a
potential problem after any alarm. Failure to do so can result in injury or death.
• Test this Smoke/CO Alarm once a week. If the Alarm ever fails to test correctly, have it
replaced immediately! If the Alarm is not working properly, it cannot alert you to a problem.
• This product is intended for use in ordinary indoor locations of family living units.
It is not designed to measure CO levels in compliance with Occupational Safety
and Health Administration (OSHA) commercial or industrial standards. Individuals
with medical conditions that may make them more sensitive to carbon monoxide
may consider using warning devices which provide audible and visual signals
for carbon monoxide concentrations under 30 ppm. For additional information
on carbon monoxide and your medical condition contact your physician.
FCC COMPLIANCE
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that the interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that of the receiver.
• Consult the dealer or an experienced radio or TV technician for help.
Changes or modifications to the product, not expressly approved by First Alert /
BRK Brands, Inc., could void the user’s authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
INSTALLATION
WHERE TO INSTALL THIS ALARM
Minimum coverage for Smoke Alarms, as recommended by the National Fire Protection
Association (NFPA), is one Smoke Alarm on every floor, in every sleeping area, and in every bedroom
(See “Regulatory Information For Smoke Alarms” for details on the NFPA recommendations).
For CO Alarms, the National Fire Protection Association (NFPA) recommends that
a CO Alarm should be centrally located outside of each separate sleeping area in
the immediate vicinity of the bedrooms. For added protection, install additional
CO Alarms in each separate bedroom, and on every level of your home.
NOTE: For added protection, install an additional Smoke/CO Alarm at least 15 feet (4.6 meters)
away from the furnace or fuel burning heat source where possible. In smaller homes or in
manufactured homes where this distance cannot be maintained, install the Alarm as far away as
possible from the furnace or other fuel burning source. Installing the Alarm closer than 15 feet
(4.6 meters) will not harm the Alarm, but may increase the frequency of unwanted alarms.
To pair this ZCOMBO alarm to a Ring or other compatible Z-Wave network, download the
appropriate App and follow the instructions to Set up Device or Connect Device.
IN GENERAL, INSTALL COMBINATION SMOKE AND CARBON MONOXIDE ALARMS:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet (12 meters) long, install a unit at each end.
• At the top of first-to-second floor stairs.
• At the bottom of the basement stairs.
• For additional coverage, install Alarms in all rooms, halls, and storage areas, where
temperatures normally remain between 40˚ F and 100˚ F (4.4˚ C and 37.8˚ C).
RECOMMENDED PLACEMENT
SUGGESTED AREAS FOR INSTALLING 
SMOKE ALARMS, CO ALARMS, AND COMBO UNITS
SMOKE ALARM WITH 
SILENCE FEATURE
CO ALARMS
BOTH, OR COMBINATION 
SMOKE/CO ALARMS
SMOKE ALARMS
KEY:
Suggested locations are based on
NFPA recommendations (NFPA 72 
for Smoke Alarms and NFPA 720 for
Carbon Monoxide Alarms). Always 
refer to national and local codes 
before beginning any installation.
In new construction AC and AC/DC smoke alarms MUST
be interconnected to meet NFPA recommendations.

• When installing on the wall, the top edge of Smoke Alarms should be placed
between 4 inches (102 mm) and 12 inches (305 mm) from the wall/ceiling line.
• When installing on the ceiling, place the alarm as close to the center as possible.
• In either case, install at least 4 inches (102 mm) from where the wall and
ceiling meet. See “Avoiding Dead Air Spaces” for more information.
NOTE: For any location, make sure no door or other obstruction could
keep carbon monoxide or smoke from reaching the Alarm.
Installing Smoke/CO Alarms in Mobile Homes
For minimum security install one Smoke/CO Alarm as close to each sleeping area as possible.
For more security, put one unit in each room. Many older mobile homes (especially those built
before 1978) have little or no insulation. If your mobile home is not well insulated, or if you
are unsure of the amount of insulation, it is important to install units on inside walls only.
WHERE THIS ALARM SHOULD NOT BE INSTALLED
DO NOT LOCATE THIS SMOKE/CO ALARM:
• In garages, furnace rooms, crawl spaces and unfinished attics.
Avoid extremely dusty, dirty or greasy areas.
WHERE THIS ALARM SHOULD NOT BE INSTALLED - DO NOT
LOCATE THIS SMOKE/CO ALARM (CONTINUED)...
• Where combustion particles are produced. Combustion particles form when something burns.
Areas to avoid include poorly ventilated kitchens, garages, and furnace rooms. Keep units at
least 20 feet (6 meters) from the sources of combustion particles (stove, furnace, water heater,
space heater) if possible. In areas where a 20-foot (6 meter) distance is not possible – in
modular, mobile, or smaller homes, for example – it is recommended the Smoke Alarm be
placed as far from these fuel-burning sources as possible. The placement recommendations
are intended to keep these Alarms at a reasonable distance from a fuel-burning source,
and thus reduce “unwanted” alarms. Unwanted alarms can occur if a Smoke Alarm is
placed directly next to a fuel-burning source. Ventilate these areas as much as possible.
• Within 5 feet (1.5 meters) of any cooking appliance. In air streams near kitchens. Air
currents can draw cooking smoke into the smoke sensor and cause unwanted alarms.
• In extremely humid areas. This Alarm should be at least 10 feet (3 meters) from a shower, sauna,
humidifier, vaporizer, dishwasher, laundry room, utility room, or other source of high humidity.
• In direct sunlight.
• In turbulent air, like near ceiling fans or open windows. Blowing air
may prevent CO or smoke from reaching the sensors.
• In areas where temperature is colder than 40˚ F (4.4˚ C) or hotter than 100˚F
(37.8˚ C). These areas include non-airconditioned crawl spaces, unfinished
attics, uninsulated or poorly insulated ceilings, porches, and garages.
• In insect infested areas. Insects can clog the openings to the sensing chamber.
• Less than 12 inches (305 mm) away from fluorescent lights.
Electrical “noise” can interfere with the sensor.
• In “dead air” spaces. See “Avoiding Dead Air Spaces”.
AVOIDING DEAD AIR SPACES
“Dead air” spaces may prevent smoke from reaching the Smoke/CO Alarm. To
avoid dead air spaces, follow installation recommendations below.
On ceilings, install Smoke/CO Alarms as close to the center of the ceiling as possible. If this is
not possible, install the Smoke/CO Alarm at least 4 inches (102 mm) from the wall or corner.
For wall mounting (if allowed by building codes), the top edge of Smoke/
CO Alarms should be placed between 4 inches (102 mm) and 12 inches (305
mm) from the wall/ceiling line, below typical “dead air” spaces.
On a peaked, gabled, or cathedral ceiling, install first Smoke/CO Alarm within 3
feet (0.9 meters) of the peak of the ceiling, measured horizontally. Additional Smoke/
CO Alarms may be required depending on the length, angle, etc. of the ceiling’s slope.
Refer to NFPA 72 for details on requirements for sloped or peaked ceilings.
WEEKLY TESTING
• NEVER use an open flame of any kind to test this unit. You might accidentally damage
or set fire to the unit or to your home. The built-in test switch accurately tests the
unit’s operation as required by Underwriters Laboratories, Inc. (UL). NEVER use
vehicle exhaust! Exhaust may cause permanent damage and voids your warranty.
• DO NOT stand close to the Alarm when the horn is sounding. Exposure at close range
may be harmful to your hearing. When testing, step away when horn starts sounding.
It is important to test this unit every week to make sure it is working properly.
Using the test button is the recommended way to test this Smoke/CO Alarm.
You can test this Smoke/CO Alarm: Press and hold the Test/
Silence button 3-5 seconds until unit starts to alarm.
During testing, you will see and hear the following sequence:
• The Horn will sound 3 beeps, pause, 3 beeps. The Power/
Smoke LED flashes Red and the CO LED will be Off.
• Next the Horn will sound 4 beeps, pause, 4 beeps. The Power/
Smoke LED will be Off and the CO LED flashes Red.
If the unit does not alarm, make sure the batteries are correctly installed,
and test again. If the unit still does not alarm, replace it immediately.
HOW TO INSTALL THIS ALARM
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This combination Smoke/CO Alarm was designed to be mounted on the ceiling
or wall. It is not a tabletop device. You must install this device on the ceiling or
wall as outlined below. Read “Where To Install This Alarm” before starting.
Tools you will need: pencil, drill with 3/16” or 5mm drill bit, flathead screwdriver, hammer.
PARTS OF THIS SMOKE/CO ALARM
1. Test/Silence Button
2. Battery Compartment
3. Power/Smoke Alarm LED
4. CO Alarm LED
• Do not connect this unit to any other alarm or auxiliary device. It is a
single-station unit that cannot be linked to other devices. Connecting
anything else to this unit may prevent it from working properly.
• Do not install this unit over an electrical junction box. Air currents around junction
boxes can prevent smoke from reaching the sensing chamber and prevent the unit from
alarming. Only AC powered units are intended for installation over junction boxes.
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If you want to lock the battery compartment, or lock the Smoke/CO Alarm to the mounting
bracket, please read the “Optional Locking Features” section located at www.firstalert.com.
1. Hold base firmly and twist the mounting bracket
counterclockwise (left) to separate it from the unit.
2. Hold the mounting bracket against the ceiling (or wall) so the vertical
mounting slot is aligned in the 12 o’clock position and trace around the
inside of the mounting slots (vertical and horizontal mounting).
3. Put the unit where it won’t get covered with dust when you drill the mounting holes.
4. Using a 3/16” (5 mm) drill bit, drill a hole through the center of the oval outlines you traced.
5. Insert the plastic screw anchors (in the plastic bag with screws) into the holes. Tap the screw
anchors gently with a hammer, if necessary, until they are flush with the ceiling or wall.
6. Line the mounting bracket up over the plastic screw anchors.
7. Screw the mounting bracket to the ceiling or wall through the
mounting slots using the two screws provided.
8. Before attaching the Alarm to the
bracket, insert the two (2) AA batteries
(included) into the battery compartment.
Match the terminals on the end of the
battery with the terminals on the unit.
Match “+” to “+” and “-” to “-.” If the
batteries are not fully inserted, the
unit cannot receive battery power.
NOTE: The unit may beep briefly
when you install the batteries. This
is normal. The GREEN Light flashes
about every 60 seconds when the
unit is receiving battery power.
The battery door will resist closing unless batteries are installed.
This warns you the unit will not operate without batteries.
9. Attach the Smoke/CO Alarm to the mounting
bracket. Line up the guides on the alarm’s
base with the guides on the mounting bracket.
When guides are lined up, turn the base
clockwise (right) until it snaps into place.
NOTE: Once the Smoke/CO Alarm is snapped
onto the mounting bracket, you can rotate the
Smoke/CO Alarm to adjust the alignment.
10. Test the Smoke/CO Alarm. See
“Weekly Testing” for details.
OTHER Z-WAVE SYSTEMS
This product can be operated in any Z-Wave network with other Z-Wave certified devices
from other manufacturers. All non-battery operated nodes within the network will act
as repeaters regardless of the vendor to increase the reliability of the network.
ADD
1. Slide battery door open.
2. Insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
REMOVE
1. Slide battery door open.
2. Remove and re-insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
• The alarm will remain awake for 30 seconds on inclusion.
RESET DEVICE
If the device is powered up with the test button held down for 10+ seconds, the device will reset all
Z-Wave settings and leave the network.
Upon completion of the Reset operation, the LED will glow and the horn will sound for ~1 second.
Please use this procedure only when the network primary controller is missing or
otherwise inoperable.
NOTE: The device will not remain awake after resetting and will go into standby mode.
PROCEDURE TO MANUALLY WAKE-UP THE DEVICE
To manual wake-up the device, slide the battery door open wait for ~5 seconds and then slide
the battery drawer closed. Upon power-up, the device will send the wake-up notification.
DSK LOCATION ON THE PRODUCT
The QR code and the 5-digit DSK pin can be found on the product nameplate which is located on
the back of the product. The Full DSK string can be found on the product insert, available inside the
product packaging.
For more information on Z-Wave specifications, visit www.firstalert.com/zwaveinfo.
REGULAR MAINTENANCE
This unit has been designed to be as maintenance-free as possible, but there
are a few simple things you must do to keep it working properly.
• Test it at least once a week.
• Clean the Smoke/CO Alarm at least once a month; gently vacuum the outside of the Smoke/CO
Alarm using your household vacuum’s soft brush attachment. A can of clean compressed air (sold
at computer or office supply stores) may also be used. Follow manufacturer instructions for use.
Test the Smoke/CO Alarm. Never use water, cleaners or solvents since they may damage the unit.
• If the Smoke/CO Alarm becomes contaminated by excessive dirt, dust and/or grime,
and cannot be cleaned to avoid unwanted alarms, replace the unit immediately.
• Relocate the unit if it sounds frequent unwanted alarms. See
“Where This Alarm Should Not Be Installed” for details.
Choosing a replacement battery:
Your Smoke/CO Alarm requires two standard AA batteries. The following batteries are acceptable as
replacements: Energizer E91, Duracell MN1500/LR6. These batteries are available at many local
retail stores.
• Always use the exact batteries specified by this User’s Manual. DO NOT use
rechargeable batteries. Clean the battery contacts and also those of the device prior
to battery installation. Install batteries correctly with regard to polarity (+ and -).
• Please dispose of or recycle used batteries properly, following any local
regulations. Consult your local waste management authority or recycling
organization to find an electronics recycling facility in your area. DO NOT
DISPOSE OF BATTERIES IN FIRE. BATTERIES MAY EXPLODE OR LEAK.
• Constant exposure to high or low temperatures or high humidity may reduce battery life.
• Keep battery out of reach of children. In the event a battery is swallowed,
immediately contact your poison control center, your physician, or the National
Battery Ingestion hotline at 202-625-3333 as serious injury may occur.
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Actual battery service life depends on the Smoke/CO Alarm and the environment in which
it is installed. All the batteries specified above are acceptable replacement batteries for
this unit. Regardless of the manufacturer’s suggested battery life, you MUST replace
the battery immediately once the unit starts “chirping” (the “low battery warning”).
To replace the batteries (without removing
Alarm from the ceiling or wall):
1. Open the battery compartment.
2. Press tabs A and B as shown in the
diagram and remove each battery.
3. Insert the new batteries, making sure they
snap completely into the battery compartment.
Match the terminals on the ends of the
batteries with the terminals on the unit.
4. Close the battery compartment, and then test
the unit by pressing the Test/Silence button.
AB
IF YOUR SMOKE/CO ALARM SOUNDS
WHAT TO DO FIRST–IDENTIFY THE TYPE OF ALARM
Type of Alarm What You See and Hear
Carbon Monoxide (CO)
CO LED: Flashes Red
Horn: 4 beeps, pause, 4 beeps, pause
Power/Smoke LED: Off
Smoke
Power/Smoke LED: Flashes Red
Horn: 3 beeps, pause, 3 beeps, pause
CO LED: Off
IF THE CO ALARM SOUNDS
“ALARM-MOVE TO FRESH AIR”
If you hear the CO alarm horn and the CO red light is flashing, move
everyone to a source of fresh air. DO NOT remove the batteries!
Actuation of your CO Alarm indicates the presence of carbon monoxide (CO) which
can kill you. In other words, when your CO Alarm sounds, you must not ignore it!
IF THE CO ALARM SIGNAL SOUNDS:
1. Operate the Test/Silence button.
2. Call your emergency services, fire department or 911. Write down
the number of your local emergency service here:
__________________________________________________________________
3. Immediately move to fresh air—outdoors or by an open door or window. Do a head count
to check that all persons are accounted for. Do not re-enter the premises, or move away
from the open door or window until the emergency services responder has arrived, the
premises have been aired out, and your CO Alarm remains in its normal condition.
4. After following steps 1-3, if your CO Alarm reactivates within a 24-hour period, repeat steps
1-3 and call a qualified appliance technician to investigate for sources of CO from fuel-burning
equipment and appliances, and inspect for proper operation of this equipment. If problems are
identified during this inspection have the equipment serviced immediately. Note any combustion
equipment not inspected by the technician, and consult the manufacturers’ instructions, or
contact the manufacturers directly, for more information about CO safety and this equipment.
Make sure that motor vehicles are not, and have not, been operating in an attached garage or
adjacent to the residence. Write down the number of a qualified appliance technician here:
__________________________________________________________________
NOTE: A qualified appliance technician is defined as “a person, firm, corporation, or company that
either in person or through a representative, is engaged in and responsible for the installation, testing,
servicing, or replacement of heating, ventilation, air conditioning (HVAC) equipment, combustion
appliances and equipment, and/or gas fireplaces or other decorative combustion equipment.”
IF THE SMOKE ALARM SOUNDS
RESPONDING TO AN ALARM
• If the unit alarms and you are not testing the unit, it is warning you of a
potentially dangerous situation that requires your immediate attention. NEVER
ignore any alarm. Ignoring the alarm may result in injury or death.
• Never remove the batteries from a battery operated Smoke/CO Alarm to stop an
unwanted alarm (caused by cooking smoke, etc.). Removing batteries disables
the alarm so it cannot sense smoke, and removes your protection. Instead open a
window or fan the smoke away from the unit. The alarm will reset automatically.
• If the unit alarms get everyone out of the house immediately.
WHAT TO DO IN CASE OF FIRE
Don’t panic; stay calm. Follow your family escape plan.
Get out of the house as quickly as possible. Don’t stop to get dressed or collect anything.
Feel doors with the back of your hand before opening them. If a door is cool, open it slowly.
Don’t open a hot door. Keep doors and windows closed, unless you must escape through them.
Cover your nose and mouth with a cloth (preferably damp). Take short, shallow breaths.
Meet at your planned meeting place outside your home, and do a
head count to make sure everybody got out safely.
Call the Fire Department as soon as possible from outside. Give your address, then your name.
Never go back inside a burning building for any reason.
Contact your Fire Department for ideas on making your home safer.
Alarms have various limitations. See “General Limitations of Smoke/CO Alarms” for details.
USING THE SILENCE FEATURES
Never remove the batteries to quiet an unwanted alarm. Removing the
batteries disables the alarm and removes your protection.
The Silence Feature is intended to temporarily silence the horn while you
identify and correct the problem. Do not use the Silence Feature in emergency
situations. It will not correct a CO problem or extinguish a fire.
The Silence Feature can temporarily quiet an unwanted alarm for several minutes.
Press the Test/Silence button on the alarm cover for at least 3-5 seconds.
After the Test/Silence button is released, the Red LED blinks during the silence mode.
When the Smoke Alarm is Silenced When the CO Alarm is Silenced
The Smoke Alarm will remain silent for up to
15 minutes, then return to normal operation.
If the smoke has not cleared–or continues to
increase–the device will go back into alarm.
The CO alarm will remain silent
for up to 4 minutes.
After 4 minutes, if CO levels remain potentially
dangerous the horn will start sounding again.
SILENCING THE LOW BATTERY WARNING
This silence feature can temporarily quiet the low battery warning “chirp” for
up to 8 hours. Press the Test/Silence button on the alarm cover.
Once the low battery warning “chirp” silence feature is activated, the unit continues to flash the
Green light once a minute for 8 hours. After 8 hours, the low battery “chirp” will resume. Replace
the batteries as soon as possible; this unit will not operate without battery power!
To deactivate this feature: Press the Test/Silence button again. The unit will go into Test Mode
and the low battery warning will resume (LED flashes and unit sounds “chirp” once a minute).
SILENCING THE END OF LIFE SIGNAL
This silence feature can temporarily quiet the End of Life warning “chirp” for up to 2 days.
You can silence the End of Life warning “chirp” by pressing the Test/Silence button. The
horn will chirp, acknowledging that the End of Life silence feature has been activated.
After approximately 2 days, the End of Life “chirp” will resume.
WHAT YOU NEED TO KNOW ABOUT CO
WHAT IS CO?
CO is an invisible, odorless, tasteless gas produced when fossil fuels do not burn completely,
or are exposed to heat (usually fire). Electrical appliances typically do not produce CO.
These fuels include: Wood, coal, charcoal, oil, natural gas, gasoline, kerosene, and propane.
Common appliances are often sources of CO. If they are not properly maintained,
are improperly ventilated, or malfunction, CO levels can rise quickly. CO is a real
danger now that homes are more energy efficient. “Air-tight” homes with added
insulation, sealed windows, and other weatherproofing can “trap” CO inside.
SYMPTOMS OF CO POISONING
These symptoms are related to CO POISONING and should
be discussed with ALL household members.
Mild Exposure: Slight headache, nausea, vomiting, fatigue (“flu-like” symptoms).
Medium Exposure: Throbbing headache, drowsiness, confusion, fast heart rate.
Extreme Exposure: Convulsions, unconsciousness, heart and lung failure.
Exposure to Carbon Monoxide can cause brain damage, death.
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This CO Alarm measures exposure to CO over time. It alarms if CO levels are extremely
high in a short period of time, or if CO levels reach a certain minimum over a long period of
time. The CO Alarm generally sounds an alarm before the onset of symptoms in average,
healthy adults. Why is this important? Because you need to be warned of a potential CO
problem while you can still react in time. In many reported cases of CO exposure, victims
may be aware that they are not feeling well, but become disoriented and can no longer
react well enough to exit the building or get help. Also, young children and pets may be the
first affected. The average healthy adult might not feel any symptoms when the CO Alarm
sounds. However, people with cardiac or respiratory problems, infants, unborn babies,
pregnant mothers, or elderly people can be more quickly and severely affected by CO. If
you experience even mild symptoms of CO poisoning, consult your doctor immediately!
FINDING THE SOURCE OF CO AFTER AN ALARM
Carbon monoxide is an odorless, invisible gas, which often makes it difficult to locate the source of
CO after an alarm. These are a few of the factors that can make it difficult to locate sources of CO:
• House well ventilated before the investigator arrives.
• Problem caused by “backdrafting.”
• Transient CO problem caused by special circumstances.
Because CO may dissipate by the time an investigator arrives, it may be
difficult to locate the source of CO. BRK Brands, Inc. shall not be obligated
to pay for any carbon monoxide investigation or service call.
POTENTIAL SOURCES OF CO IN THE HOME
Fuel-burning appliances like: portable
heater, gas or wood burning fireplace, gas
kitchen range or cooktop, gas clothes dryer.
Damaged or insufficient venting:
corroded or disconnected water heater
vent pipe, leaking chimney pipe or flue,
or cracked heat exchanger, blocked
or clogged chimney opening.
Improper use of appliance/
device: operating a barbecue grill
or vehicle in an enclosed area (like
a garage or screened porch).
Transient CO Problems: “transient”
or on-again-off-again CO problems
can be caused by outdoor conditions
and other special circumstances.
The following conditions can result in transient CO situations:
1. Excessive spillage or reverse venting of fuel appliances caused by outdoor conditions such as:
• Wind direction and/or velocity, including high, gusty winds. Heavy air in the
vent pipes (cold/humid air with extended periods between cycles).
• Negative pressure differential resulting from the use of exhaust fans.
• Several appliances running at the same time competing for limited fresh air.
• Vent pipe connections vibrating loose from clothes dryers, furnaces, or water heaters.
• Obstructions in or unconventional vent pipe designs which can amplify the above situations.
2. Extended operation of unvented fuel burning devices (range, oven, fireplace).
3. Temperature inversions, which can trap exhaust close to the ground.
4. Car idling in an open or closed attached garage, or near a home.
These conditions are dangerous because they can trap exhaust in your home. Since these
conditions can come and go, they are also hard to recreate during a CO investigation.
HOW CAN I PROTECT MY FAMILY
FROM CO POISONING?
A CO Alarm is an excellent means of protection. It monitors the air and sounds a loud
alarm before Carbon Monoxide levels become threatening for average, healthy adults.
A CO Alarm is not a substitute for proper maintenance of home appliances.
To help prevent CO problems and reduce the risk of CO poisoning:
• Clean chimneys and flues yearly. Keep them free of debris, leaves, and nests for
proper air flow. Also, have a professional check for rust and corrosion, cracks,
or separations. These conditions can prevent proper air movement and cause
backdrafting. Never “cap” or cover a chimney in any way that would block air flow.
• Test and maintain all fuel-burning equipment annually. Many local gas or oil
companies and HVAC companies offer appliance inspections for a nominal fee.
• Make regular visual inspections of all fuel-burning appliances. Check appliances for
excessive rust and scaling. Also check the flame on the burner and pilot lights. The
flame should be blue. A yellow flame means fuel is not being burned completely and CO
may be present. Keep the blower door on the furnace closed. Use vents or fans when
they are available on all fuel-burning appliances. Make sure appliances are vented to
the outside. Do not grill or barbecue indoors, or in garages or on screen porches.
• Check for exhaust backflow from CO sources. Check the draft hood on an operating
furnace for a backdraft. Look for cracks on furnace heat exchangers.
• Check the house or garage on the other side of shared wall.
• Keep windows and doors open slightly. If you suspect that CO is escaping into your home,
open a window or a door. Opening windows and doors can significantly decrease CO levels.
In addition, familiarize yourself with all enclosed materials. Read this manual in its
entirety, and make sure you understand what to do if your CO Alarm sounds.
REGULATORY INFORMATION FOR SMOKE/CO ALARMS
REGULATORY INFORMATION FOR CO ALARMS
WHAT LEVELS OF CO CAUSE AN ALARM?
Underwriters Laboratories Inc. Standard UL2034 requires residential CO Alarms
to sound when exposed to levels of CO and exposure times as described below.
They are measured in parts per million (ppm) of CO over time (in minutes).
UL2034 Required Alarm Points*:
• If the alarm is exposed to 400 ppm of CO, IT MUST ALARM BETWEEN 4 and 15 MINUTES.
• If the alarm is exposed to 150 ppm of CO, IT MUST ALARM BETWEEN 10 and 50 MINUTES.
• If the alarm is exposed to 70 ppm if CO, IT MUST ALARM BETWEEN 60 and 240 MINUTES.
*Approximately 10% COHb exposure at levels of 10% to 95% Relative Humidity (RH).
The unit is designed not to alarm when exposed to a constant level of 30 ppm for 30 days.
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CO Alarms are designed to alarm before there is an immediate life threat.
Since you cannot see or smell CO, never assume it’s not present.
• An exposure to 100 ppm of CO for 20 minutes may not affect average, healthy
adults, but after 4 hours the same level may cause headaches.
• An exposure to 400 ppm of CO may cause headaches in average, healthy
adults after 35 minutes, but can cause death after 2 hours.
Standards: Underwriters Laboratories Inc. Single and Multiple
Station carbon monoxide alarms UL2034.
According to Underwriters Laboratories Inc. UL2034, Section 1-1.2: “Carbon monoxide alarms
covered by these requirements are intended to respond to the presence of carbon monoxide from
sources such as, but not limited to, exhaust from internal-combustion engines, abnormal operation
of fuel-fired appliances, and fireplaces. CO Alarms are intended to alarm at carbon monoxide
levels below those that could cause a loss of ability to react to the dangers of Carbon Monoxide
exposure.” This CO Alarm monitors the air at the Alarm, and is designed to alarm before CO levels
become life threatening. This allows you precious time to leave the house and correct the problem.
This is only possible if Alarms are located, installed, and maintained as described in this manual.
Gas Detection at Typical Temperature and Humidity Ranges: The CO Alarm is not formulated
to detect CO levels below 30 ppm typically. UL tested for false alarm resistance to Methane (500
ppm), Butane (300 ppm), Heptane (500 ppm), Ethyl Acetate (200 ppm), Isopropyl Alcohol (200 ppm)
and Carbon Dioxide (5000 ppm). Values measure gas and vapor concentrations in parts per million.
Audible Alarm: 85 dB minimum at 10 feet (3 meters).
Printed in Mexico M08-0456-169793_1044807 K1 02/20
REGULATORY INFORMATION FOR SMOKE ALARMS
RECOMMENDED LOCATIONS FOR SMOKE ALARMS
Installing Smoke Alarms in Single-Family Residences
The National Fire Protection Association (NFPA), recommends one Smoke Alarm on every floor,
in every sleeping area, and in every bedroom. In new construction, the Smoke Alarms must be
AC powered and interconnected. See “Agency Placement Recommendations” for details.
For additional coverage, it is recommended that you install a Smoke Alarm in all
rooms, halls, storage areas, finished attics, and basements, where temperatures
normally remain between 40˚ F (4.4˚ C) and 100˚ F (37.8˚ C). Make sure no door or
other obstruction could keep smoke from reaching the Smoke Alarms.
More specifically, install Smoke Alarms:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet long (12 meters), install a unit at each end.
• At the top of the first-to-second floor stairway, and at the bottom of the basement stairway.
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Specific requirements for Smoke Alarm installation vary from state to state and from region to region.
Check with your local Fire Department for current requirements in your area. It is recommended AC
or AC/DC units be interconnected for added protection.
AGENCY PLACEMENT RECOMMENDATIONS
Standards: Underwriters Laboratories Inc. Single and Multiple Station Smoke Alarms 217.
NFPA 72 Chapter 29
“For your information, the National Fire Alarm and Signaling Code, NFPA 72, reads as follows:”
29.5.1* Required Detection.
29.5.1.1* Where required by other governing laws, codes, or standards for a specific type of
occupancy, approved single and multiple-station smoke alarms shall be installed as follows:
(1) *In all sleeping rooms and guest rooms
(2) *Outside of each separate dwelling unit sleeping area, within 21 ft (6.4 m) of any
door to a sleeping room, with the distance measured along a path of travel
(3) On every level of a dwelling unit, including basements
(4) On every level of a residential board and care occupancy (small facility),
including basements and excluding crawl spaces and unfinished attics
(5) *In the living area(s) of a guest suite
(6) In the living area(s) of a residential board and care occupancy (small facility)
(Reprinted with permission from NFPA 72®, National Fire Alarm and Signaling Code Copyright © 2010
National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the complete
and official position of the National Fire Protection Association, on the referenced subject which is
represented only by the standard in its entirety), (National Fire Alarm and Signaling Code®and NFPA
72®are registered trademarks of the National Fire Protection Association, Inc., Quincy, MA 02269).
California State Fire Marshal (CSFM)
Early warning detection is best achieved by the installation of fire detection equipment
in all rooms and areas of the household as follows: A Smoke Alarm installed in each
separate sleeping area (in the vicinity, but outside bedrooms), and Heat or Smoke Alarms
in the living rooms, dining rooms, bedrooms, kitchens, hallways, finished attics, furnace
rooms, closets, utility and storage rooms, basements, and attached garages.
ABOUT SMOKE ALARMS
Battery (DC) operated Smoke Alarms: Provide protection even when
electricity fails, provided the batteries are fresh and correctly installed. Units
are easy to install, and do not require professional installation.
AC powered Smoke Alarms: Can be interconnected so if one unit senses smoke,
all units alarm. They do not operate if electricity fails. AC with battery (DC) back-
up: will operate if electricity fails, provided the batteries are fresh and correctly
installed. AC and AC/DC units must be installed by a qualified electrician.
Smoke/CO Alarms for Solar or Wind Energy users and battery backup power systems:
AC powered Smoke/CO Alarms should only be operated with true or pure sine wave inverters.
Operating this Alarm with most battery-powered UPS (uninterruptible power supply) products
or square wave or “quasi sine wave” inverters will damage the Alarm. If you are not sure
about your inverter or UPS type, please consult with the manufacturer to verify.
Smoke Alarms for the hearing impaired: Special purpose Smoke Alarms should
be installed for the hearing impaired. They include a visual alarm and an audible
alarm horn, and meet the requirements of the Americans With Disabilities Act.
Can be interconnected so if one unit senses smoke, all units alarm.
ABOUT SMOKE ALARMS (CONTINUED)...
Smoke alarms are not to be used with detector guards unless the
combination has been evaluated and found suitable for that purpose.
All these Smoke Alarms are designed to provide early warning of fires if located, installed and
cared for as described in the user’s manual, and if smoke reaches the Alarm. If you are unsure
which type of Smoke Alarm to install, refer the National Fire Protection Association (NFPA)
Standard 72 (National Fire Alarm and Signaling Code) and NFPA 101 (Life Safety Code). National
Fire Protection Association, One Batterymarch Park, Quincy, MA 02269-9101. Local building
codes may also require specific units in new construction or in different areas of the home.
SPECIAL COMPLIANCE CONSIDERATIONS
This Smoke Alarm is suitable for use in apartments, condominiums, townhouses, hospitals, day
care facilities, health care facilities, boarding houses, group homes and dormitories provided
a primary fire detection system already exists to meet fire detection requirements in common
areas like lobbies, hallways, or porches. Using this Smoke Alarm in common areas may not
provide sufficient warning to all residents or meet local fire protection ordinances/regulations.
This Smoke Alarm alone is not a suitable substitute for complete fire detection systems
in places housing many people—like apartment buildings, condominiums, hotels, motels,
dormitories, hospitals, health care facilities, nursing homes, day care facilities, or group homes
of any kind. It is not a suitable substitute for complete fire detection systems in warehouses,
industrial facilities, commercial buildings, and special-purpose non-residential buildings which
require special fire detection and alarm systems. Depending on the building codes in your
area, this Smoke Alarm may be used to provide additional protection in these facilities.
In new construction, most building codes require the use of AC or AC/DC powered Smoke
Alarms only. In existing construction, AC, AC/DC, or DC powered Smoke Alarms can be used
as specified by local building codes. Refer to NFPA 72 (National Fire Alarm and Signaling
Code) and NFPA 101 (Life Safety Code), local building codes, or consult your Fire Department
for detailed fire protection requirements in buildings not defined as “households”.
HUD MAP PROGRAM
Certain HUD battery powered Smoke Alarm applications, especially those that fall under
HUD 223(f) MAP (Multi-family Accelerated Processing), may require a 10 Year sealed tamper
resistant battery. This alarm does not meet that requirement. Substitute First Alert SA340B.
GENERAL LIMITATIONS OF SMOKE/CO ALARMS
This Smoke/CO Alarm is intended for residential use. It is not intended for use in industrial
applications where Occupational Safety and Health Administration (OSHA) requirements for
Carbon Monoxide Alarms must be met. The Smoke Alarm portion of this device is not intended
to alert hearing impaired residents. Special purpose Smoke Alarms should be installed for
hearing impaired residents (CO Alarms are not yet available for the hearing impaired).
Smoke/CO Alarms may not waken all individuals. Practice the escape plan at least twice a year,
making sure that everyone is involved – from kids to grand- parents. Allow children to master fire
escape planning and practice before holding a fire drill at night when they are sleeping. If children
or others do not readily waken to the sound of the Smoke/CO Alarm, or if there are infants or
family members with mobility limitations, make sure that someone is assigned to assist them in
fire drill and in the event of an emergency. It is recommended that you hold a fire drill while family
members are sleeping in order to determine their response to the sound of the Smoke/CO Alarm
while sleeping and to determine whether they may need assistance in the event of an emergency.
Smoke/CO Alarms cannot work without power. Battery operated units cannot work if the batteries
are missing, disconnected or dead, if the wrong type of batteries are used, or if the batteries are not
installed correctly. AC units cannot work if the AC power is cut off for any reason (open fuse or circuit
breaker, failure along a power line or at a power station, electrical fire that burns the electrical wires,
etc.). If you are concerned about the limitations of battery or AC power, install both types of units.
This Smoke/CO Alarm will not sense smoke or CO that does not reach the sensors. It will
only sense smoke or CO at the sensor. Smoke or CO may be present in other areas. Doors or other
obstructions may affect the rate at which CO or smoke reaches the sensors. If bedroom doors are
usually closed at night, we recommend you install an alarm device (Combination CO and Smoke
Alarm, or separate CO Alarms and Smoke Alarms) in each bedroom and in the hallway between them.
This Smoke/CO Alarm may not sense smoke or CO on another level of the home. Example:
This alarm device, installed on the second floor, may not sense smoke or CO in the basement.
For this reason, one alarm device may not give adequate early warning. Recommended minimum
protection is one alarm device in every sleeping area, every bedroom, and on every level of your
home. Some experts recommend battery powered Smoke and CO Alarms be used in conjunction
with interconnected AC powered Smoke Alarms. For details, see “About Smoke Alarms” for details.
Smoke/CO Alarms may not be heard. The alarm horn loudness meets or exceeds current
UL standards of 85 dB at 10 feet (3 meters). However, if the Smoke/CO Alarm is installed
outside the bedroom, it may not wake up a sound sleeper or one who has recently used
drugs or has been drinking alcoholic beverages. This is especially true if the door is closed
or only partly open. Even persons who are awake may not hear the alarm horn if the sound
is blocked by distance or closed doors. Noise from traffic, stereo, radio, television, air
conditioner, or other appliances may also prevent alert persons from hearing the alarm
horn. This Smoke/CO Alarm is not intended for people who are hearing impaired.
The Alarm may not have time to alarm before the fire itself causes damage,
injury, or death, since smoke from some fires may not reach the unit
immediately. Examples of this include persons smoking in bed, children playing with
matches, or fires caused by violent explosions resulting from escaping gas.
This Smoke/CO Alarm is not a substitute for life insurance. Though this Smoke/CO Alarm
warns against increasing CO levels or the presence of smoke, BRK Brands, Inc. does not warrant or
imply in any way that they will protect lives. Homeowners and renters must still insure their lives.
This Smoke/CO Alarm has a limited life. Although this Smoke/CO Alarm and all
of its parts have passed many stringent tests and are designed to be as reliable as
possible, any of these parts could fail at any time. Therefore, you must test this device
weekly. The unit should be replaced immediately if it is not operating properly.
This Smoke/CO Alarm is not foolproof. Like all other electronic devices, this Smoke/CO Alarm
has limitations. It can only detect smoke or CO that reaches the sensors. It may not give early
warning of the source of smoke or CO is in a remote part of the home, away from the alarm device.
Z-Wave Mesh Network Limitations 1. Alarms are single stationed Alarms and are
not interconnected to each other. 2. Only initiating Alarms will sound. 3. Z-Wave
system is not listed as a life safety system. Mesh network system only provides
supplemental notifications and should not be counted on for life safety.
TROUBLESHOOTING GUIDE
IF THE ALARM... PROBLEM... YOU SHOULD...
Horn “chirps” and LED flashes GREEN about once per minute. Low battery warning. Install two new AA batteries*.
Horn “chirps” 3 times every minute; LED
flashes GREEN 3 rapid flashes.
MALFUNCTION SIGNAL. Device is not working
properly, and needs to be replaced.
Units under warranty should be returned to manufacturer
for replacement. See “Limited Warranty” for details.
Horn “chirps” 5 times every minute; LED
flashes GREEN 5 rapid flashes. END OF LIFE SIGNAL. Alarm needs to be replaced. Immediately replace the Alarm.
Carbon Monoxide Alarm ONLY:
CO Alarm goes back into alarm 4 minutes after you Silence it. CO levels indicate a potentially dangerous situation.
IF YOU ARE FEELING SYMPTOMS OF CO POISONING,
EVACUATE your home and call 911 or the Fire Department.
Refer to “If The CO Alarm Sounds” for details.
CO Alarm sounds frequently even though no high
levels of CO are revealed in an investigation.
The CO Alarm may be improperly located. Refer
to “Where to Install This Alarm” for details.
Relocate your Alarm. If frequent alarms continue, have
home rechecked for potential CO problems. You may
be experiencing an intermittent CO problem.
Smoke Alarm ONLY:
Smoke Alarm sounds when no smoke is visible. Unwanted alarm may be caused by non-
emergency source like cooking smoke.
Silence Alarm using manual button; clean the Alarm’s
cover with a soft, clean cloth. If frequent unwanted alarms
continue, relocate your Alarm. Alarm may be too close to
a kitchen, cooking appliance, or steamy bathroom.
*For a list of acceptable replacement batteries, see “Regular Maintenance.”
If you have any questions that cannot be answered by reading this manual, call the Customer Service Team: 1-800-323-9005.
LIMITED WARRANTY
BRK Brands, Inc., (“BRK”) the maker of First Alert®brand and BRK®brand products, warrants that for a period of ten years from the date of purchase, this product will be free from defects in
material and workmanship. BRK, at its option, will repair or replace this product or any component of the product found to be defective during the warranty period. Replacement will be made with a
new or remanufactured product or component. If the product is no longer available, replacement may be made with a similar product of equal or greater value. This is your exclusive warranty.
This warranty is valid for the original retail purchaser from the date of initial retail purchase and is not transferable. Keep the original sales receipt. Proof of purchase is required to obtain warranty
performance. BRK dealers, service centers, or retail stores selling BRK products do not have the right to alter, modify or any way change the terms and conditions of this warranty.
This warranty does not cover normal wear of parts or damage resulting from any of the following: negligent use or misuse of the product, use on improper
voltage or current, use contrary to the operating instructions, disassembly, repair or alteration by anyone other than BRK or an authorized service center. Further,
the warranty does not cover Acts of God, such as fire, flood, hurricanes and tornadoes or any batteries that are included with this unit.
BRK shall not be liable for any incidental or consequential damages caused by the breach of any express or implied warranty. Except to the extent prohibited by applicable law,
any implied warranty of merchantability or fitness for a particular purpose is limited in duration to the duration of the above warranty. Some states, provinces or jurisdictions
do not allow the exclusion or limitation of incidental or consequential damages or limitations on how long an implied warranty lasts, so the above limitations or exclusion
may not apply to you. This warranty gives you specific legal rights, and you may also have other rights that vary from state to state or province to province.
How to Obtain Warranty Service
Service: If service is required, do not return the product to your retailer. In order to obtain warranty service, contact the Customer Service Team at
1-800-323-9005. To assist us in serving you, please have the model number and date of purchase available when calling.
For Warranty Service return to: 1301 Joe Battle, El Paso, TX 79936
Battery: BRK Brands, Inc. make no warranty, express or implied, written or oral, including that of merchantability or fitness for any particular purpose with respect to battery.
Visit www.firstalert.com for more information.
For your records, please record:
Date Purchased: ______________/_________________Month/Year
Where Purchased: ____________________________________________
Date Installed: ____________/____________Month/Year
Replace alarm 7 years after installation. Please write the date in the
space provided: __________/__________ Month/Year
The alarm will also provide an audible End-of-Life Signal approximately
7 years after installation to remind you to replace the unit.
The End-of-Life Signal can be silenced for up to 2 days. Do not unplug
the alarm or remove the batteries until you get replacement.
A copy of the manual can be found at www.firstalert.com/products.

123456
USER’S MANUAL
COMBINATION CARBON
MONOXIDE & SMOKE ALARM
IMPORTANT! PLEASE READ CAREFULLY AND SAVE.
This user’s manual contains important information about your Combination Carbon
Monoxide & Smoke Alarm’s operation. If you are installing this Alarm for use by
others, you must leave this manual— or a copy of it—with the end user.
Separate sensors to detect smoke and CO;
the two alarm systems work independently
Powered by two “AA” batteries
Side access drawer for easy battery replacement
Printed in Mexico
M08-0456-169793_1044807 K1 02/20
CONFORMS TO
UL STD 217 AND UL STD 2034 Model ZCOMBO
Sku 1044807
© 2020 BRK Brands, Inc. All rights reserved. •Distributed by BRK Brands, Inc.
Aurora, IL 60504 •BRK Brands, Inc. is a subsidiary of Newell Brands Inc. (NASDAQ: NWL)
Customer Service Team: [phone] •www.firstalert.com •www.brkelectronics.com
All First Alert®and BRK®Smoke Alarms conform to regulatory requirements,
including UL217 and are designed to detect particles of combustion. Smoke
particles of varying number and size are produced in all fires.
Ionization technology is generally more sensitive than photoelectric technology at
detecting small particles, which tend to be produced in greater amounts by flaming
fires, which consume combustible materials rapidly and spread quickly. Sources of
these fires may include paper burning in a wastebasket, or a grease fire in the kitchen.
Photoelectric technology is generally more sensitive than ionization technology
at detecting large particles, which tend to be produced in greater amounts
by smoldering fires, which may smolder for hours before bursting into flame.
Sources of these fires may include cigarettes burning in couches or bedding.
For maximum protection, use both types of Smoke Alarms on
each level and in every bedroom of your home.
INTRODUCTION
FIRE SAFETY TIPS
Follow safety rules and prevent hazardous situations: 1) Use smoking materials properly. Never
smoke in bed. 2) Keep matches or lighters away from children; 3) Store flammable materials in
proper containers; 4) Keep electrical appliances in good condition and don’t overload electrical
circuits; 5) Keep stoves, barbecue grills, fireplaces and chimneys grease- and debris-free; 6)
Never leave anything cooking on the stove unattended; 7) Keep portable heaters and open
flames, like candles, away from flammable materials; 8) Don’t let rubbish accumulate.
Keep alarms clean, and test them weekly. Replace alarms immediately if they are not working
properly. Smoke Alarms that do not work cannot alert you to a fire. Keep at least one working
fire extinguisher on every floor, and an additional one in the kitchen. Have fire escape ladders
or other reliable means of escape from an upper floor in case stairs are blocked.
BASIC SAFETY INFORMATION
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• Dangers, Warnings, and Cautions alert you to important operating instructions
or to potentially hazardous situations. Pay special attention to these items.
• This Smoke/CO Alarm is approved for use in single-family
residences. It is NOT designed for marine or RV use.
• This combination Smoke/Carbon Monoxide Alarm has two separate alarms. The CO
Alarm is not designed to detect fire or any other gas. It will only indicate the presence
of carbon monoxide gas at the sensor. Carbon monoxide gas may be present in
other areas. The Smoke Alarm will only indicate the presence of smoke that reaches
the sensor. The Smoke Alarm is not designed to sense gas, heat or flames.
• This Smoke/CO Alarm cannot operate without working batteries.
Removing the batteries for any reason, or failing to replace the batteries
at the end of their service life, removes your protection.
• NEVER ignore any alarm. See “If Your Smoke/CO Alarm Sounds” for more information
on how to respond to an alarm. Failure to respond can result in injury or death.
• The Silence Features are for your convenience only and will not correct a problem.
See “Using the Silence Features” for details. Always check your home for a
potential problem after any alarm. Failure to do so can result in injury or death.
• Test this Smoke/CO Alarm once a week. If the Alarm ever fails to test correctly, have it
replaced immediately! If the Alarm is not working properly, it cannot alert you to a problem.
• This product is intended for use in ordinary indoor locations of family living units.
It is not designed to measure CO levels in compliance with Occupational Safety
and Health Administration (OSHA) commercial or industrial standards. Individuals
with medical conditions that may make them more sensitive to carbon monoxide
may consider using warning devices which provide audible and visual signals
for carbon monoxide concentrations under 30 ppm. For additional information
on carbon monoxide and your medical condition contact your physician.
FCC COMPLIANCE
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that the interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that of the receiver.
• Consult the dealer or an experienced radio or TV technician for help.
Changes or modifications to the product, not expressly approved by First Alert /
BRK Brands, Inc., could void the user’s authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
INSTALLATION
WHERE TO INSTALL THIS ALARM
Minimum coverage for Smoke Alarms, as recommended by the National Fire Protection
Association (NFPA), is one Smoke Alarm on every floor, in every sleeping area, and in every bedroom
(See “Regulatory Information For Smoke Alarms” for details on the NFPA recommendations).
For CO Alarms, the National Fire Protection Association (NFPA) recommends that
a CO Alarm should be centrally located outside of each separate sleeping area in
the immediate vicinity of the bedrooms. For added protection, install additional
CO Alarms in each separate bedroom, and on every level of your home.
NOTE: For added protection, install an additional Smoke/CO Alarm at least 15 feet (4.6 meters)
away from the furnace or fuel burning heat source where possible. In smaller homes or in
manufactured homes where this distance cannot be maintained, install the Alarm as far away as
possible from the furnace or other fuel burning source. Installing the Alarm closer than 15 feet
(4.6 meters) will not harm the Alarm, but may increase the frequency of unwanted alarms.
To pair this ZCOMBO alarm to a Ring or other compatible Z-Wave network, download the
appropriate App and follow the instructions to Set up Device or Connect Device.
IN GENERAL, INSTALL COMBINATION SMOKE AND CARBON MONOXIDE ALARMS:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet (12 meters) long, install a unit at each end.
• At the top of first-to-second floor stairs.
• At the bottom of the basement stairs.
• For additional coverage, install Alarms in all rooms, halls, and storage areas, where
temperatures normally remain between 40˚ F and 100˚ F (4.4˚ C and 37.8˚ C).
RECOMMENDED PLACEMENT
SUGGESTED AREAS FOR INSTALLING 
SMOKE ALARMS, CO ALARMS, AND COMBO UNITS
SMOKE ALARM WITH 
SILENCE FEATURE
CO ALARMS
BOTH, OR COMBINATION 
SMOKE/CO ALARMS
SMOKE ALARMS
KEY:
Suggested locations are based on
NFPA recommendations (NFPA 72 
for Smoke Alarms and NFPA 720 for
Carbon Monoxide Alarms). Always 
refer to national and local codes 
before beginning any installation.
In new construction AC and AC/DC smoke alarms MUST
be interconnected to meet NFPA recommendations.

• When installing on the wall, the top edge of Smoke Alarms should be placed
between 4 inches (102 mm) and 12 inches (305 mm) from the wall/ceiling line.
• When installing on the ceiling, place the alarm as close to the center as possible.
• In either case, install at least 4 inches (102 mm) from where the wall and
ceiling meet. See “Avoiding Dead Air Spaces” for more information.
NOTE: For any location, make sure no door or other obstruction could
keep carbon monoxide or smoke from reaching the Alarm.
Installing Smoke/CO Alarms in Mobile Homes
For minimum security install one Smoke/CO Alarm as close to each sleeping area as possible.
For more security, put one unit in each room. Many older mobile homes (especially those built
before 1978) have little or no insulation. If your mobile home is not well insulated, or if you
are unsure of the amount of insulation, it is important to install units on inside walls only.
WHERE THIS ALARM SHOULD NOT BE INSTALLED
DO NOT LOCATE THIS SMOKE/CO ALARM:
• In garages, furnace rooms, crawl spaces and unfinished attics.
Avoid extremely dusty, dirty or greasy areas.
WHERE THIS ALARM SHOULD NOT BE INSTALLED - DO NOT
LOCATE THIS SMOKE/CO ALARM (CONTINUED)...
• Where combustion particles are produced. Combustion particles form when something burns.
Areas to avoid include poorly ventilated kitchens, garages, and furnace rooms. Keep units at
least 20 feet (6 meters) from the sources of combustion particles (stove, furnace, water heater,
space heater) if possible. In areas where a 20-foot (6 meter) distance is not possible – in
modular, mobile, or smaller homes, for example – it is recommended the Smoke Alarm be
placed as far from these fuel-burning sources as possible. The placement recommendations
are intended to keep these Alarms at a reasonable distance from a fuel-burning source,
and thus reduce “unwanted” alarms. Unwanted alarms can occur if a Smoke Alarm is
placed directly next to a fuel-burning source. Ventilate these areas as much as possible.
• Within 5 feet (1.5 meters) of any cooking appliance. In air streams near kitchens. Air
currents can draw cooking smoke into the smoke sensor and cause unwanted alarms.
• In extremely humid areas. This Alarm should be at least 10 feet (3 meters) from a shower, sauna,
humidifier, vaporizer, dishwasher, laundry room, utility room, or other source of high humidity.
• In direct sunlight.
• In turbulent air, like near ceiling fans or open windows. Blowing air
may prevent CO or smoke from reaching the sensors.
• In areas where temperature is colder than 40˚ F (4.4˚ C) or hotter than 100˚F
(37.8˚ C). These areas include non-airconditioned crawl spaces, unfinished
attics, uninsulated or poorly insulated ceilings, porches, and garages.
• In insect infested areas. Insects can clog the openings to the sensing chamber.
• Less than 12 inches (305 mm) away from fluorescent lights.
Electrical “noise” can interfere with the sensor.
• In “dead air” spaces. See “Avoiding Dead Air Spaces”.
AVOIDING DEAD AIR SPACES
“Dead air” spaces may prevent smoke from reaching the Smoke/CO Alarm. To
avoid dead air spaces, follow installation recommendations below.
On ceilings, install Smoke/CO Alarms as close to the center of the ceiling as possible. If this is
not possible, install the Smoke/CO Alarm at least 4 inches (102 mm) from the wall or corner.
For wall mounting (if allowed by building codes), the top edge of Smoke/
CO Alarms should be placed between 4 inches (102 mm) and 12 inches (305
mm) from the wall/ceiling line, below typical “dead air” spaces.
On a peaked, gabled, or cathedral ceiling, install first Smoke/CO Alarm within 3
feet (0.9 meters) of the peak of the ceiling, measured horizontally. Additional Smoke/
CO Alarms may be required depending on the length, angle, etc. of the ceiling’s slope.
Refer to NFPA 72 for details on requirements for sloped or peaked ceilings.
WEEKLY TESTING
• NEVER use an open flame of any kind to test this unit. You might accidentally damage
or set fire to the unit or to your home. The built-in test switch accurately tests the
unit’s operation as required by Underwriters Laboratories, Inc. (UL). NEVER use
vehicle exhaust! Exhaust may cause permanent damage and voids your warranty.
• DO NOT stand close to the Alarm when the horn is sounding. Exposure at close range
may be harmful to your hearing. When testing, step away when horn starts sounding.
It is important to test this unit every week to make sure it is working properly.
Using the test button is the recommended way to test this Smoke/CO Alarm.
You can test this Smoke/CO Alarm: Press and hold the Test/
Silence button 3-5 seconds until unit starts to alarm.
During testing, you will see and hear the following sequence:
• The Horn will sound 3 beeps, pause, 3 beeps. The Power/
Smoke LED flashes Red and the CO LED will be Off.
• Next the Horn will sound 4 beeps, pause, 4 beeps. The Power/
Smoke LED will be Off and the CO LED flashes Red.
If the unit does not alarm, make sure the batteries are correctly installed,
and test again. If the unit still does not alarm, replace it immediately.
HOW TO INSTALL THIS ALARM
Da
This combination Smoke/CO Alarm was designed to be mounted on the ceiling
or wall. It is not a tabletop device. You must install this device on the ceiling or
wall as outlined below. Read “Where To Install This Alarm” before starting.
Tools you will need: pencil, drill with 3/16” or 5mm drill bit, flathead screwdriver, hammer.
PARTS OF THIS SMOKE/CO ALARM
1. Test/Silence Button
2. Battery Compartment
3. Power/Smoke Alarm LED
4. CO Alarm LED
• Do not connect this unit to any other alarm or auxiliary device. It is a
single-station unit that cannot be linked to other devices. Connecting
anything else to this unit may prevent it from working properly.
• Do not install this unit over an electrical junction box. Air currents around junction
boxes can prevent smoke from reaching the sensing chamber and prevent the unit from
alarming. Only AC powered units are intended for installation over junction boxes.
Da
If you want to lock the battery compartment, or lock the Smoke/CO Alarm to the mounting
bracket, please read the “Optional Locking Features” section located at www.firstalert.com.
1. Hold base firmly and twist the mounting bracket
counterclockwise (left) to separate it from the unit.
2. Hold the mounting bracket against the ceiling (or wall) so the vertical
mounting slot is aligned in the 12 o’clock position and trace around the
inside of the mounting slots (vertical and horizontal mounting).
3. Put the unit where it won’t get covered with dust when you drill the mounting holes.
4. Using a 3/16” (5 mm) drill bit, drill a hole through the center of the oval outlines you traced.
5. Insert the plastic screw anchors (in the plastic bag with screws) into the holes. Tap the screw
anchors gently with a hammer, if necessary, until they are flush with the ceiling or wall.
6. Line the mounting bracket up over the plastic screw anchors.
7. Screw the mounting bracket to the ceiling or wall through the
mounting slots using the two screws provided.
8. Before attaching the Alarm to the
bracket, insert the two (2) AA batteries
(included) into the battery compartment.
Match the terminals on the end of the
battery with the terminals on the unit.
Match “+” to “+” and “-” to “-.” If the
batteries are not fully inserted, the
unit cannot receive battery power.
NOTE: The unit may beep briefly
when you install the batteries. This
is normal. The GREEN Light flashes
about every 60 seconds when the
unit is receiving battery power.
The battery door will resist closing unless batteries are installed.
This warns you the unit will not operate without batteries.
9. Attach the Smoke/CO Alarm to the mounting
bracket. Line up the guides on the alarm’s
base with the guides on the mounting bracket.
When guides are lined up, turn the base
clockwise (right) until it snaps into place.
NOTE: Once the Smoke/CO Alarm is snapped
onto the mounting bracket, you can rotate the
Smoke/CO Alarm to adjust the alignment.
10. Test the Smoke/CO Alarm. See
“Weekly Testing” for details.
OTHER Z-WAVE SYSTEMS
This product can be operated in any Z-Wave network with other Z-Wave certified devices
from other manufacturers. All non-battery operated nodes within the network will act
as repeaters regardless of the vendor to increase the reliability of the network.
ADD
1. Slide battery door open.
2. Insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
REMOVE
1. Slide battery door open.
2. Remove and re-insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
• The alarm will remain awake for 30 seconds on inclusion.
RESET DEVICE
If the device is powered up with the test button held down for 10+ seconds, the device will reset all
Z-Wave settings and leave the network.
Upon completion of the Reset operation, the LED will glow and the horn will sound for ~1 second.
Please use this procedure only when the network primary controller is missing or
otherwise inoperable.
NOTE: The device will not remain awake after resetting and will go into standby mode.
PROCEDURE TO MANUALLY WAKE-UP THE DEVICE
To manual wake-up the device, slide the battery door open wait for ~5 seconds and then slide
the battery drawer closed. Upon power-up, the device will send the wake-up notification.
DSK LOCATION ON THE PRODUCT
The QR code and the 5-digit DSK pin can be found on the product nameplate which is located on
the back of the product. The Full DSK string can be found on the product insert, available inside the
product packaging.
For more information on Z-Wave specifications, visit www.firstalert.com/zwaveinfo.
REGULAR MAINTENANCE
This unit has been designed to be as maintenance-free as possible, but there
are a few simple things you must do to keep it working properly.
• Test it at least once a week.
• Clean the Smoke/CO Alarm at least once a month; gently vacuum the outside of the Smoke/CO
Alarm using your household vacuum’s soft brush attachment. A can of clean compressed air (sold
at computer or office supply stores) may also be used. Follow manufacturer instructions for use.
Test the Smoke/CO Alarm. Never use water, cleaners or solvents since they may damage the unit.
• If the Smoke/CO Alarm becomes contaminated by excessive dirt, dust and/or grime,
and cannot be cleaned to avoid unwanted alarms, replace the unit immediately.
• Relocate the unit if it sounds frequent unwanted alarms. See
“Where This Alarm Should Not Be Installed” for details.
Choosing a replacement battery:
Your Smoke/CO Alarm requires two standard AA batteries. The following batteries are acceptable as
replacements: Energizer E91, Duracell MN1500/LR6. These batteries are available at many local
retail stores.
• Always use the exact batteries specified by this User’s Manual. DO NOT use
rechargeable batteries. Clean the battery contacts and also those of the device prior
to battery installation. Install batteries correctly with regard to polarity (+ and -).
• Please dispose of or recycle used batteries properly, following any local
regulations. Consult your local waste management authority or recycling
organization to find an electronics recycling facility in your area. DO NOT
DISPOSE OF BATTERIES IN FIRE. BATTERIES MAY EXPLODE OR LEAK.
• Constant exposure to high or low temperatures or high humidity may reduce battery life.
• Keep battery out of reach of children. In the event a battery is swallowed,
immediately contact your poison control center, your physician, or the National
Battery Ingestion hotline at 202-625-3333 as serious injury may occur.
Da
Actual battery service life depends on the Smoke/CO Alarm and the environment in which
it is installed. All the batteries specified above are acceptable replacement batteries for
this unit. Regardless of the manufacturer’s suggested battery life, you MUST replace
the battery immediately once the unit starts “chirping” (the “low battery warning”).
To replace the batteries (without removing
Alarm from the ceiling or wall):
1. Open the battery compartment.
2. Press tabs A and B as shown in the
diagram and remove each battery.
3. Insert the new batteries, making sure they
snap completely into the battery compartment.
Match the terminals on the ends of the
batteries with the terminals on the unit.
4. Close the battery compartment, and then test
the unit by pressing the Test/Silence button.
AB
IF YOUR SMOKE/CO ALARM SOUNDS
WHAT TO DO FIRST–IDENTIFY THE TYPE OF ALARM
Type of Alarm What You See and Hear
Carbon Monoxide (CO)
CO LED: Flashes Red
Horn: 4 beeps, pause, 4 beeps, pause
Power/Smoke LED: Off
Smoke
Power/Smoke LED: Flashes Red
Horn: 3 beeps, pause, 3 beeps, pause
CO LED: Off
IF THE CO ALARM SOUNDS
“ALARM-MOVE TO FRESH AIR”
If you hear the CO alarm horn and the CO red light is flashing, move
everyone to a source of fresh air. DO NOT remove the batteries!
Actuation of your CO Alarm indicates the presence of carbon monoxide (CO) which
can kill you. In other words, when your CO Alarm sounds, you must not ignore it!
IF THE CO ALARM SIGNAL SOUNDS:
1. Operate the Test/Silence button.
2. Call your emergency services, fire department or 911. Write down
the number of your local emergency service here:
__________________________________________________________________
3. Immediately move to fresh air—outdoors or by an open door or window. Do a head count
to check that all persons are accounted for. Do not re-enter the premises, or move away
from the open door or window until the emergency services responder has arrived, the
premises have been aired out, and your CO Alarm remains in its normal condition.
4. After following steps 1-3, if your CO Alarm reactivates within a 24-hour period, repeat steps
1-3 and call a qualified appliance technician to investigate for sources of CO from fuel-burning
equipment and appliances, and inspect for proper operation of this equipment. If problems are
identified during this inspection have the equipment serviced immediately. Note any combustion
equipment not inspected by the technician, and consult the manufacturers’ instructions, or
contact the manufacturers directly, for more information about CO safety and this equipment.
Make sure that motor vehicles are not, and have not, been operating in an attached garage or
adjacent to the residence. Write down the number of a qualified appliance technician here:
__________________________________________________________________
NOTE: A qualified appliance technician is defined as “a person, firm, corporation, or company that
either in person or through a representative, is engaged in and responsible for the installation, testing,
servicing, or replacement of heating, ventilation, air conditioning (HVAC) equipment, combustion
appliances and equipment, and/or gas fireplaces or other decorative combustion equipment.”
IF THE SMOKE ALARM SOUNDS
RESPONDING TO AN ALARM
• If the unit alarms and you are not testing the unit, it is warning you of a
potentially dangerous situation that requires your immediate attention. NEVER
ignore any alarm. Ignoring the alarm may result in injury or death.
• Never remove the batteries from a battery operated Smoke/CO Alarm to stop an
unwanted alarm (caused by cooking smoke, etc.). Removing batteries disables
the alarm so it cannot sense smoke, and removes your protection. Instead open a
window or fan the smoke away from the unit. The alarm will reset automatically.
• If the unit alarms get everyone out of the house immediately.
WHAT TO DO IN CASE OF FIRE
Don’t panic; stay calm. Follow your family escape plan.
Get out of the house as quickly as possible. Don’t stop to get dressed or collect anything.
Feel doors with the back of your hand before opening them. If a door is cool, open it slowly.
Don’t open a hot door. Keep doors and windows closed, unless you must escape through them.
Cover your nose and mouth with a cloth (preferably damp). Take short, shallow breaths.
Meet at your planned meeting place outside your home, and do a
head count to make sure everybody got out safely.
Call the Fire Department as soon as possible from outside. Give your address, then your name.
Never go back inside a burning building for any reason.
Contact your Fire Department for ideas on making your home safer.
Alarms have various limitations. See “General Limitations of Smoke/CO Alarms” for details.
USING THE SILENCE FEATURES
Never remove the batteries to quiet an unwanted alarm. Removing the
batteries disables the alarm and removes your protection.
The Silence Feature is intended to temporarily silence the horn while you
identify and correct the problem. Do not use the Silence Feature in emergency
situations. It will not correct a CO problem or extinguish a fire.
The Silence Feature can temporarily quiet an unwanted alarm for several minutes.
Press the Test/Silence button on the alarm cover for at least 3-5 seconds.
After the Test/Silence button is released, the Red LED blinks during the silence mode.
When the Smoke Alarm is Silenced When the CO Alarm is Silenced
The Smoke Alarm will remain silent for up to
15 minutes, then return to normal operation.
If the smoke has not cleared–or continues to
increase–the device will go back into alarm.
The CO alarm will remain silent
for up to 4 minutes.
After 4 minutes, if CO levels remain potentially
dangerous the horn will start sounding again.
SILENCING THE LOW BATTERY WARNING
This silence feature can temporarily quiet the low battery warning “chirp” for
up to 8 hours. Press the Test/Silence button on the alarm cover.
Once the low battery warning “chirp” silence feature is activated, the unit continues to flash the
Green light once a minute for 8 hours. After 8 hours, the low battery “chirp” will resume. Replace
the batteries as soon as possible; this unit will not operate without battery power!
To deactivate this feature: Press the Test/Silence button again. The unit will go into Test Mode
and the low battery warning will resume (LED flashes and unit sounds “chirp” once a minute).
SILENCING THE END OF LIFE SIGNAL
This silence feature can temporarily quiet the End of Life warning “chirp” for up to 2 days.
You can silence the End of Life warning “chirp” by pressing the Test/Silence button. The
horn will chirp, acknowledging that the End of Life silence feature has been activated.
After approximately 2 days, the End of Life “chirp” will resume.
WHAT YOU NEED TO KNOW ABOUT CO
WHAT IS CO?
CO is an invisible, odorless, tasteless gas produced when fossil fuels do not burn completely,
or are exposed to heat (usually fire). Electrical appliances typically do not produce CO.
These fuels include: Wood, coal, charcoal, oil, natural gas, gasoline, kerosene, and propane.
Common appliances are often sources of CO. If they are not properly maintained,
are improperly ventilated, or malfunction, CO levels can rise quickly. CO is a real
danger now that homes are more energy efficient. “Air-tight” homes with added
insulation, sealed windows, and other weatherproofing can “trap” CO inside.
SYMPTOMS OF CO POISONING
These symptoms are related to CO POISONING and should
be discussed with ALL household members.
Mild Exposure: Slight headache, nausea, vomiting, fatigue (“flu-like” symptoms).
Medium Exposure: Throbbing headache, drowsiness, confusion, fast heart rate.
Extreme Exposure: Convulsions, unconsciousness, heart and lung failure.
Exposure to Carbon Monoxide can cause brain damage, death.
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This CO Alarm measures exposure to CO over time. It alarms if CO levels are extremely
high in a short period of time, or if CO levels reach a certain minimum over a long period of
time. The CO Alarm generally sounds an alarm before the onset of symptoms in average,
healthy adults. Why is this important? Because you need to be warned of a potential CO
problem while you can still react in time. In many reported cases of CO exposure, victims
may be aware that they are not feeling well, but become disoriented and can no longer
react well enough to exit the building or get help. Also, young children and pets may be the
first affected. The average healthy adult might not feel any symptoms when the CO Alarm
sounds. However, people with cardiac or respiratory problems, infants, unborn babies,
pregnant mothers, or elderly people can be more quickly and severely affected by CO. If
you experience even mild symptoms of CO poisoning, consult your doctor immediately!
FINDING THE SOURCE OF CO AFTER AN ALARM
Carbon monoxide is an odorless, invisible gas, which often makes it difficult to locate the source of
CO after an alarm. These are a few of the factors that can make it difficult to locate sources of CO:
• House well ventilated before the investigator arrives.
• Problem caused by “backdrafting.”
• Transient CO problem caused by special circumstances.
Because CO may dissipate by the time an investigator arrives, it may be
difficult to locate the source of CO. BRK Brands, Inc. shall not be obligated
to pay for any carbon monoxide investigation or service call.
POTENTIAL SOURCES OF CO IN THE HOME
Fuel-burning appliances like: portable
heater, gas or wood burning fireplace, gas
kitchen range or cooktop, gas clothes dryer.
Damaged or insufficient venting:
corroded or disconnected water heater
vent pipe, leaking chimney pipe or flue,
or cracked heat exchanger, blocked
or clogged chimney opening.
Improper use of appliance/
device: operating a barbecue grill
or vehicle in an enclosed area (like
a garage or screened porch).
Transient CO Problems: “transient”
or on-again-off-again CO problems
can be caused by outdoor conditions
and other special circumstances.
The following conditions can result in transient CO situations:
1. Excessive spillage or reverse venting of fuel appliances caused by outdoor conditions such as:
• Wind direction and/or velocity, including high, gusty winds. Heavy air in the
vent pipes (cold/humid air with extended periods between cycles).
• Negative pressure differential resulting from the use of exhaust fans.
• Several appliances running at the same time competing for limited fresh air.
• Vent pipe connections vibrating loose from clothes dryers, furnaces, or water heaters.
• Obstructions in or unconventional vent pipe designs which can amplify the above situations.
2. Extended operation of unvented fuel burning devices (range, oven, fireplace).
3. Temperature inversions, which can trap exhaust close to the ground.
4. Car idling in an open or closed attached garage, or near a home.
These conditions are dangerous because they can trap exhaust in your home. Since these
conditions can come and go, they are also hard to recreate during a CO investigation.
HOW CAN I PROTECT MY FAMILY
FROM CO POISONING?
A CO Alarm is an excellent means of protection. It monitors the air and sounds a loud
alarm before Carbon Monoxide levels become threatening for average, healthy adults.
A CO Alarm is not a substitute for proper maintenance of home appliances.
To help prevent CO problems and reduce the risk of CO poisoning:
• Clean chimneys and flues yearly. Keep them free of debris, leaves, and nests for
proper air flow. Also, have a professional check for rust and corrosion, cracks,
or separations. These conditions can prevent proper air movement and cause
backdrafting. Never “cap” or cover a chimney in any way that would block air flow.
• Test and maintain all fuel-burning equipment annually. Many local gas or oil
companies and HVAC companies offer appliance inspections for a nominal fee.
• Make regular visual inspections of all fuel-burning appliances. Check appliances for
excessive rust and scaling. Also check the flame on the burner and pilot lights. The
flame should be blue. A yellow flame means fuel is not being burned completely and CO
may be present. Keep the blower door on the furnace closed. Use vents or fans when
they are available on all fuel-burning appliances. Make sure appliances are vented to
the outside. Do not grill or barbecue indoors, or in garages or on screen porches.
• Check for exhaust backflow from CO sources. Check the draft hood on an operating
furnace for a backdraft. Look for cracks on furnace heat exchangers.
• Check the house or garage on the other side of shared wall.
• Keep windows and doors open slightly. If you suspect that CO is escaping into your home,
open a window or a door. Opening windows and doors can significantly decrease CO levels.
In addition, familiarize yourself with all enclosed materials. Read this manual in its
entirety, and make sure you understand what to do if your CO Alarm sounds.
REGULATORY INFORMATION FOR SMOKE/CO ALARMS
REGULATORY INFORMATION FOR CO ALARMS
WHAT LEVELS OF CO CAUSE AN ALARM?
Underwriters Laboratories Inc. Standard UL2034 requires residential CO Alarms
to sound when exposed to levels of CO and exposure times as described below.
They are measured in parts per million (ppm) of CO over time (in minutes).
UL2034 Required Alarm Points*:
• If the alarm is exposed to 400 ppm of CO, IT MUST ALARM BETWEEN 4 and 15 MINUTES.
• If the alarm is exposed to 150 ppm of CO, IT MUST ALARM BETWEEN 10 and 50 MINUTES.
• If the alarm is exposed to 70 ppm if CO, IT MUST ALARM BETWEEN 60 and 240 MINUTES.
*Approximately 10% COHb exposure at levels of 10% to 95% Relative Humidity (RH).
The unit is designed not to alarm when exposed to a constant level of 30 ppm for 30 days.
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CO Alarms are designed to alarm before there is an immediate life threat.
Since you cannot see or smell CO, never assume it’s not present.
• An exposure to 100 ppm of CO for 20 minutes may not affect average, healthy
adults, but after 4 hours the same level may cause headaches.
• An exposure to 400 ppm of CO may cause headaches in average, healthy
adults after 35 minutes, but can cause death after 2 hours.
Standards: Underwriters Laboratories Inc. Single and Multiple
Station carbon monoxide alarms UL2034.
According to Underwriters Laboratories Inc. UL2034, Section 1-1.2: “Carbon monoxide alarms
covered by these requirements are intended to respond to the presence of carbon monoxide from
sources such as, but not limited to, exhaust from internal-combustion engines, abnormal operation
of fuel-fired appliances, and fireplaces. CO Alarms are intended to alarm at carbon monoxide
levels below those that could cause a loss of ability to react to the dangers of Carbon Monoxide
exposure.” This CO Alarm monitors the air at the Alarm, and is designed to alarm before CO levels
become life threatening. This allows you precious time to leave the house and correct the problem.
This is only possible if Alarms are located, installed, and maintained as described in this manual.
Gas Detection at Typical Temperature and Humidity Ranges: The CO Alarm is not formulated
to detect CO levels below 30 ppm typically. UL tested for false alarm resistance to Methane (500
ppm), Butane (300 ppm), Heptane (500 ppm), Ethyl Acetate (200 ppm), Isopropyl Alcohol (200 ppm)
and Carbon Dioxide (5000 ppm). Values measure gas and vapor concentrations in parts per million.
Audible Alarm: 85 dB minimum at 10 feet (3 meters).
Printed in Mexico M08-0456-169793_1044807 K1 02/20
REGULATORY INFORMATION FOR SMOKE ALARMS
RECOMMENDED LOCATIONS FOR SMOKE ALARMS
Installing Smoke Alarms in Single-Family Residences
The National Fire Protection Association (NFPA), recommends one Smoke Alarm on every floor,
in every sleeping area, and in every bedroom. In new construction, the Smoke Alarms must be
AC powered and interconnected. See “Agency Placement Recommendations” for details.
For additional coverage, it is recommended that you install a Smoke Alarm in all
rooms, halls, storage areas, finished attics, and basements, where temperatures
normally remain between 40˚ F (4.4˚ C) and 100˚ F (37.8˚ C). Make sure no door or
other obstruction could keep smoke from reaching the Smoke Alarms.
More specifically, install Smoke Alarms:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet long (12 meters), install a unit at each end.
• At the top of the first-to-second floor stairway, and at the bottom of the basement stairway.
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Specific requirements for Smoke Alarm installation vary from state to state and from region to region.
Check with your local Fire Department for current requirements in your area. It is recommended AC
or AC/DC units be interconnected for added protection.
AGENCY PLACEMENT RECOMMENDATIONS
Standards: Underwriters Laboratories Inc. Single and Multiple Station Smoke Alarms 217.
NFPA 72 Chapter 29
“For your information, the National Fire Alarm and Signaling Code, NFPA 72, reads as follows:”
29.5.1* Required Detection.
29.5.1.1* Where required by other governing laws, codes, or standards for a specific type of
occupancy, approved single and multiple-station smoke alarms shall be installed as follows:
(1) *In all sleeping rooms and guest rooms
(2) *Outside of each separate dwelling unit sleeping area, within 21 ft (6.4 m) of any
door to a sleeping room, with the distance measured along a path of travel
(3) On every level of a dwelling unit, including basements
(4) On every level of a residential board and care occupancy (small facility),
including basements and excluding crawl spaces and unfinished attics
(5) *In the living area(s) of a guest suite
(6) In the living area(s) of a residential board and care occupancy (small facility)
(Reprinted with permission from NFPA 72®, National Fire Alarm and Signaling Code Copyright © 2010
National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the complete
and official position of the National Fire Protection Association, on the referenced subject which is
represented only by the standard in its entirety), (National Fire Alarm and Signaling Code®and NFPA
72®are registered trademarks of the National Fire Protection Association, Inc., Quincy, MA 02269).
California State Fire Marshal (CSFM)
Early warning detection is best achieved by the installation of fire detection equipment
in all rooms and areas of the household as follows: A Smoke Alarm installed in each
separate sleeping area (in the vicinity, but outside bedrooms), and Heat or Smoke Alarms
in the living rooms, dining rooms, bedrooms, kitchens, hallways, finished attics, furnace
rooms, closets, utility and storage rooms, basements, and attached garages.
ABOUT SMOKE ALARMS
Battery (DC) operated Smoke Alarms: Provide protection even when
electricity fails, provided the batteries are fresh and correctly installed. Units
are easy to install, and do not require professional installation.
AC powered Smoke Alarms: Can be interconnected so if one unit senses smoke,
all units alarm. They do not operate if electricity fails. AC with battery (DC) back-
up: will operate if electricity fails, provided the batteries are fresh and correctly
installed. AC and AC/DC units must be installed by a qualified electrician.
Smoke/CO Alarms for Solar or Wind Energy users and battery backup power systems:
AC powered Smoke/CO Alarms should only be operated with true or pure sine wave inverters.
Operating this Alarm with most battery-powered UPS (uninterruptible power supply) products
or square wave or “quasi sine wave” inverters will damage the Alarm. If you are not sure
about your inverter or UPS type, please consult with the manufacturer to verify.
Smoke Alarms for the hearing impaired: Special purpose Smoke Alarms should
be installed for the hearing impaired. They include a visual alarm and an audible
alarm horn, and meet the requirements of the Americans With Disabilities Act.
Can be interconnected so if one unit senses smoke, all units alarm.
ABOUT SMOKE ALARMS (CONTINUED)...
Smoke alarms are not to be used with detector guards unless the
combination has been evaluated and found suitable for that purpose.
All these Smoke Alarms are designed to provide early warning of fires if located, installed and
cared for as described in the user’s manual, and if smoke reaches the Alarm. If you are unsure
which type of Smoke Alarm to install, refer the National Fire Protection Association (NFPA)
Standard 72 (National Fire Alarm and Signaling Code) and NFPA 101 (Life Safety Code). National
Fire Protection Association, One Batterymarch Park, Quincy, MA 02269-9101. Local building
codes may also require specific units in new construction or in different areas of the home.
SPECIAL COMPLIANCE CONSIDERATIONS
This Smoke Alarm is suitable for use in apartments, condominiums, townhouses, hospitals, day
care facilities, health care facilities, boarding houses, group homes and dormitories provided
a primary fire detection system already exists to meet fire detection requirements in common
areas like lobbies, hallways, or porches. Using this Smoke Alarm in common areas may not
provide sufficient warning to all residents or meet local fire protection ordinances/regulations.
This Smoke Alarm alone is not a suitable substitute for complete fire detection systems
in places housing many people—like apartment buildings, condominiums, hotels, motels,
dormitories, hospitals, health care facilities, nursing homes, day care facilities, or group homes
of any kind. It is not a suitable substitute for complete fire detection systems in warehouses,
industrial facilities, commercial buildings, and special-purpose non-residential buildings which
require special fire detection and alarm systems. Depending on the building codes in your
area, this Smoke Alarm may be used to provide additional protection in these facilities.
In new construction, most building codes require the use of AC or AC/DC powered Smoke
Alarms only. In existing construction, AC, AC/DC, or DC powered Smoke Alarms can be used
as specified by local building codes. Refer to NFPA 72 (National Fire Alarm and Signaling
Code) and NFPA 101 (Life Safety Code), local building codes, or consult your Fire Department
for detailed fire protection requirements in buildings not defined as “households”.
HUD MAP PROGRAM
Certain HUD battery powered Smoke Alarm applications, especially those that fall under
HUD 223(f) MAP (Multi-family Accelerated Processing), may require a 10 Year sealed tamper
resistant battery. This alarm does not meet that requirement. Substitute First Alert SA340B.
GENERAL LIMITATIONS OF SMOKE/CO ALARMS
This Smoke/CO Alarm is intended for residential use. It is not intended for use in industrial
applications where Occupational Safety and Health Administration (OSHA) requirements for
Carbon Monoxide Alarms must be met. The Smoke Alarm portion of this device is not intended
to alert hearing impaired residents. Special purpose Smoke Alarms should be installed for
hearing impaired residents (CO Alarms are not yet available for the hearing impaired).
Smoke/CO Alarms may not waken all individuals. Practice the escape plan at least twice a year,
making sure that everyone is involved – from kids to grand- parents. Allow children to master fire
escape planning and practice before holding a fire drill at night when they are sleeping. If children
or others do not readily waken to the sound of the Smoke/CO Alarm, or if there are infants or
family members with mobility limitations, make sure that someone is assigned to assist them in
fire drill and in the event of an emergency. It is recommended that you hold a fire drill while family
members are sleeping in order to determine their response to the sound of the Smoke/CO Alarm
while sleeping and to determine whether they may need assistance in the event of an emergency.
Smoke/CO Alarms cannot work without power. Battery operated units cannot work if the batteries
are missing, disconnected or dead, if the wrong type of batteries are used, or if the batteries are not
installed correctly. AC units cannot work if the AC power is cut off for any reason (open fuse or circuit
breaker, failure along a power line or at a power station, electrical fire that burns the electrical wires,
etc.). If you are concerned about the limitations of battery or AC power, install both types of units.
This Smoke/CO Alarm will not sense smoke or CO that does not reach the sensors. It will
only sense smoke or CO at the sensor. Smoke or CO may be present in other areas. Doors or other
obstructions may affect the rate at which CO or smoke reaches the sensors. If bedroom doors are
usually closed at night, we recommend you install an alarm device (Combination CO and Smoke
Alarm, or separate CO Alarms and Smoke Alarms) in each bedroom and in the hallway between them.
This Smoke/CO Alarm may not sense smoke or CO on another level of the home. Example:
This alarm device, installed on the second floor, may not sense smoke or CO in the basement.
For this reason, one alarm device may not give adequate early warning. Recommended minimum
protection is one alarm device in every sleeping area, every bedroom, and on every level of your
home. Some experts recommend battery powered Smoke and CO Alarms be used in conjunction
with interconnected AC powered Smoke Alarms. For details, see “About Smoke Alarms” for details.
Smoke/CO Alarms may not be heard. The alarm horn loudness meets or exceeds current
UL standards of 85 dB at 10 feet (3 meters). However, if the Smoke/CO Alarm is installed
outside the bedroom, it may not wake up a sound sleeper or one who has recently used
drugs or has been drinking alcoholic beverages. This is especially true if the door is closed
or only partly open. Even persons who are awake may not hear the alarm horn if the sound
is blocked by distance or closed doors. Noise from traffic, stereo, radio, television, air
conditioner, or other appliances may also prevent alert persons from hearing the alarm
horn. This Smoke/CO Alarm is not intended for people who are hearing impaired.
The Alarm may not have time to alarm before the fire itself causes damage,
injury, or death, since smoke from some fires may not reach the unit
immediately. Examples of this include persons smoking in bed, children playing with
matches, or fires caused by violent explosions resulting from escaping gas.
This Smoke/CO Alarm is not a substitute for life insurance. Though this Smoke/CO Alarm
warns against increasing CO levels or the presence of smoke, BRK Brands, Inc. does not warrant or
imply in any way that they will protect lives. Homeowners and renters must still insure their lives.
This Smoke/CO Alarm has a limited life. Although this Smoke/CO Alarm and all
of its parts have passed many stringent tests and are designed to be as reliable as
possible, any of these parts could fail at any time. Therefore, you must test this device
weekly. The unit should be replaced immediately if it is not operating properly.
This Smoke/CO Alarm is not foolproof. Like all other electronic devices, this Smoke/CO Alarm
has limitations. It can only detect smoke or CO that reaches the sensors. It may not give early
warning of the source of smoke or CO is in a remote part of the home, away from the alarm device.
Z-Wave Mesh Network Limitations 1. Alarms are single stationed Alarms and are
not interconnected to each other. 2. Only initiating Alarms will sound. 3. Z-Wave
system is not listed as a life safety system. Mesh network system only provides
supplemental notifications and should not be counted on for life safety.
TROUBLESHOOTING GUIDE
IF THE ALARM... PROBLEM... YOU SHOULD...
Horn “chirps” and LED flashes GREEN about once per minute. Low battery warning. Install two new AA batteries*.
Horn “chirps” 3 times every minute; LED
flashes GREEN 3 rapid flashes.
MALFUNCTION SIGNAL. Device is not working
properly, and needs to be replaced.
Units under warranty should be returned to manufacturer
for replacement. See “Limited Warranty” for details.
Horn “chirps” 5 times every minute; LED
flashes GREEN 5 rapid flashes. END OF LIFE SIGNAL. Alarm needs to be replaced. Immediately replace the Alarm.
Carbon Monoxide Alarm ONLY:
CO Alarm goes back into alarm 4 minutes after you Silence it. CO levels indicate a potentially dangerous situation.
IF YOU ARE FEELING SYMPTOMS OF CO POISONING,
EVACUATE your home and call 911 or the Fire Department.
Refer to “If The CO Alarm Sounds” for details.
CO Alarm sounds frequently even though no high
levels of CO are revealed in an investigation.
The CO Alarm may be improperly located. Refer
to “Where to Install This Alarm” for details.
Relocate your Alarm. If frequent alarms continue, have
home rechecked for potential CO problems. You may
be experiencing an intermittent CO problem.
Smoke Alarm ONLY:
Smoke Alarm sounds when no smoke is visible. Unwanted alarm may be caused by non-
emergency source like cooking smoke.
Silence Alarm using manual button; clean the Alarm’s
cover with a soft, clean cloth. If frequent unwanted alarms
continue, relocate your Alarm. Alarm may be too close to
a kitchen, cooking appliance, or steamy bathroom.
*For a list of acceptable replacement batteries, see “Regular Maintenance.”
If you have any questions that cannot be answered by reading this manual, call the Customer Service Team: 1-800-323-9005.
LIMITED WARRANTY
BRK Brands, Inc., (“BRK”) the maker of First Alert®brand and BRK®brand products, warrants that for a period of ten years from the date of purchase, this product will be free from defects in
material and workmanship. BRK, at its option, will repair or replace this product or any component of the product found to be defective during the warranty period. Replacement will be made with a
new or remanufactured product or component. If the product is no longer available, replacement may be made with a similar product of equal or greater value. This is your exclusive warranty.
This warranty is valid for the original retail purchaser from the date of initial retail purchase and is not transferable. Keep the original sales receipt. Proof of purchase is required to obtain warranty
performance. BRK dealers, service centers, or retail stores selling BRK products do not have the right to alter, modify or any way change the terms and conditions of this warranty.
This warranty does not cover normal wear of parts or damage resulting from any of the following: negligent use or misuse of the product, use on improper
voltage or current, use contrary to the operating instructions, disassembly, repair or alteration by anyone other than BRK or an authorized service center. Further,
the warranty does not cover Acts of God, such as fire, flood, hurricanes and tornadoes or any batteries that are included with this unit.
BRK shall not be liable for any incidental or consequential damages caused by the breach of any express or implied warranty. Except to the extent prohibited by applicable law,
any implied warranty of merchantability or fitness for a particular purpose is limited in duration to the duration of the above warranty. Some states, provinces or jurisdictions
do not allow the exclusion or limitation of incidental or consequential damages or limitations on how long an implied warranty lasts, so the above limitations or exclusion
may not apply to you. This warranty gives you specific legal rights, and you may also have other rights that vary from state to state or province to province.
How to Obtain Warranty Service
Service: If service is required, do not return the product to your retailer. In order to obtain warranty service, contact the Customer Service Team at
1-800-323-9005. To assist us in serving you, please have the model number and date of purchase available when calling.
For Warranty Service return to: 1301 Joe Battle, El Paso, TX 79936
Battery: BRK Brands, Inc. make no warranty, express or implied, written or oral, including that of merchantability or fitness for any particular purpose with respect to battery.
Visit www.firstalert.com for more information.
For your records, please record:
Date Purchased: ______________/_________________Month/Year
Where Purchased: ____________________________________________
Date Installed: ____________/____________Month/Year
Replace alarm 7 years after installation. Please write the date in the
space provided: __________/__________ Month/Year
The alarm will also provide an audible End-of-Life Signal approximately
7 years after installation to remind you to replace the unit.
The End-of-Life Signal can be silenced for up to 2 days. Do not unplug
the alarm or remove the batteries until you get replacement.
A copy of the manual can be found at www.firstalert.com/products.

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USER’S MANUAL
COMBINATION CARBON
MONOXIDE & SMOKE ALARM
IMPORTANT! PLEASE READ CAREFULLY AND SAVE.
This user’s manual contains important information about your Combination Carbon
Monoxide & Smoke Alarm’s operation. If you are installing this Alarm for use by
others, you must leave this manual— or a copy of it—with the end user.
Separate sensors to detect smoke and CO;
the two alarm systems work independently
Powered by two “AA” batteries
Side access drawer for easy battery replacement
Printed in Mexico
M08-0456-169793_1044807 K1 02/20
CONFORMS TO
UL STD 217 AND UL STD 2034 Model ZCOMBO
Sku 1044807
© 2020 BRK Brands, Inc. All rights reserved. •Distributed by BRK Brands, Inc.
Aurora, IL 60504 •BRK Brands, Inc. is a subsidiary of Newell Brands Inc. (NASDAQ: NWL)
Customer Service Team: [phone] •www.firstalert.com •www.brkelectronics.com
All First Alert®and BRK®Smoke Alarms conform to regulatory requirements,
including UL217 and are designed to detect particles of combustion. Smoke
particles of varying number and size are produced in all fires.
Ionization technology is generally more sensitive than photoelectric technology at
detecting small particles, which tend to be produced in greater amounts by flaming
fires, which consume combustible materials rapidly and spread quickly. Sources of
these fires may include paper burning in a wastebasket, or a grease fire in the kitchen.
Photoelectric technology is generally more sensitive than ionization technology
at detecting large particles, which tend to be produced in greater amounts
by smoldering fires, which may smolder for hours before bursting into flame.
Sources of these fires may include cigarettes burning in couches or bedding.
For maximum protection, use both types of Smoke Alarms on
each level and in every bedroom of your home.
INTRODUCTION
FIRE SAFETY TIPS
Follow safety rules and prevent hazardous situations: 1) Use smoking materials properly. Never
smoke in bed. 2) Keep matches or lighters away from children; 3) Store flammable materials in
proper containers; 4) Keep electrical appliances in good condition and don’t overload electrical
circuits; 5) Keep stoves, barbecue grills, fireplaces and chimneys grease- and debris-free; 6)
Never leave anything cooking on the stove unattended; 7) Keep portable heaters and open
flames, like candles, away from flammable materials; 8) Don’t let rubbish accumulate.
Keep alarms clean, and test them weekly. Replace alarms immediately if they are not working
properly. Smoke Alarms that do not work cannot alert you to a fire. Keep at least one working
fire extinguisher on every floor, and an additional one in the kitchen. Have fire escape ladders
or other reliable means of escape from an upper floor in case stairs are blocked.
BASIC SAFETY INFORMATION
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• Dangers, Warnings, and Cautions alert you to important operating instructions
or to potentially hazardous situations. Pay special attention to these items.
• This Smoke/CO Alarm is approved for use in single-family
residences. It is NOT designed for marine or RV use.
• This combination Smoke/Carbon Monoxide Alarm has two separate alarms. The CO
Alarm is not designed to detect fire or any other gas. It will only indicate the presence
of carbon monoxide gas at the sensor. Carbon monoxide gas may be present in
other areas. The Smoke Alarm will only indicate the presence of smoke that reaches
the sensor. The Smoke Alarm is not designed to sense gas, heat or flames.
• This Smoke/CO Alarm cannot operate without working batteries.
Removing the batteries for any reason, or failing to replace the batteries
at the end of their service life, removes your protection.
• NEVER ignore any alarm. See “If Your Smoke/CO Alarm Sounds” for more information
on how to respond to an alarm. Failure to respond can result in injury or death.
• The Silence Features are for your convenience only and will not correct a problem.
See “Using the Silence Features” for details. Always check your home for a
potential problem after any alarm. Failure to do so can result in injury or death.
• Test this Smoke/CO Alarm once a week. If the Alarm ever fails to test correctly, have it
replaced immediately! If the Alarm is not working properly, it cannot alert you to a problem.
• This product is intended for use in ordinary indoor locations of family living units.
It is not designed to measure CO levels in compliance with Occupational Safety
and Health Administration (OSHA) commercial or industrial standards. Individuals
with medical conditions that may make them more sensitive to carbon monoxide
may consider using warning devices which provide audible and visual signals
for carbon monoxide concentrations under 30 ppm. For additional information
on carbon monoxide and your medical condition contact your physician.
FCC COMPLIANCE
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that the interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that of the receiver.
• Consult the dealer or an experienced radio or TV technician for help.
Changes or modifications to the product, not expressly approved by First Alert /
BRK Brands, Inc., could void the user’s authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
INSTALLATION
WHERE TO INSTALL THIS ALARM
Minimum coverage for Smoke Alarms, as recommended by the National Fire Protection
Association (NFPA), is one Smoke Alarm on every floor, in every sleeping area, and in every bedroom
(See “Regulatory Information For Smoke Alarms” for details on the NFPA recommendations).
For CO Alarms, the National Fire Protection Association (NFPA) recommends that
a CO Alarm should be centrally located outside of each separate sleeping area in
the immediate vicinity of the bedrooms. For added protection, install additional
CO Alarms in each separate bedroom, and on every level of your home.
NOTE: For added protection, install an additional Smoke/CO Alarm at least 15 feet (4.6 meters)
away from the furnace or fuel burning heat source where possible. In smaller homes or in
manufactured homes where this distance cannot be maintained, install the Alarm as far away as
possible from the furnace or other fuel burning source. Installing the Alarm closer than 15 feet
(4.6 meters) will not harm the Alarm, but may increase the frequency of unwanted alarms.
To pair this ZCOMBO alarm to a Ring or other compatible Z-Wave network, download the
appropriate App and follow the instructions to Set up Device or Connect Device.
IN GENERAL, INSTALL COMBINATION SMOKE AND CARBON MONOXIDE ALARMS:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet (12 meters) long, install a unit at each end.
• At the top of first-to-second floor stairs.
• At the bottom of the basement stairs.
• For additional coverage, install Alarms in all rooms, halls, and storage areas, where
temperatures normally remain between 40˚ F and 100˚ F (4.4˚ C and 37.8˚ C).
RECOMMENDED PLACEMENT
SUGGESTED AREAS FOR INSTALLING 
SMOKE ALARMS, CO ALARMS, AND COMBO UNITS
SMOKE ALARM WITH 
SILENCE FEATURE
CO ALARMS
BOTH, OR COMBINATION 
SMOKE/CO ALARMS
SMOKE ALARMS
KEY:
Suggested locations are based on
NFPA recommendations (NFPA 72 
for Smoke Alarms and NFPA 720 for
Carbon Monoxide Alarms). Always 
refer to national and local codes 
before beginning any installation.
In new construction AC and AC/DC smoke alarms MUST
be interconnected to meet NFPA recommendations.

• When installing on the wall, the top edge of Smoke Alarms should be placed
between 4 inches (102 mm) and 12 inches (305 mm) from the wall/ceiling line.
• When installing on the ceiling, place the alarm as close to the center as possible.
• In either case, install at least 4 inches (102 mm) from where the wall and
ceiling meet. See “Avoiding Dead Air Spaces” for more information.
NOTE: For any location, make sure no door or other obstruction could
keep carbon monoxide or smoke from reaching the Alarm.
Installing Smoke/CO Alarms in Mobile Homes
For minimum security install one Smoke/CO Alarm as close to each sleeping area as possible.
For more security, put one unit in each room. Many older mobile homes (especially those built
before 1978) have little or no insulation. If your mobile home is not well insulated, or if you
are unsure of the amount of insulation, it is important to install units on inside walls only.
WHERE THIS ALARM SHOULD NOT BE INSTALLED
DO NOT LOCATE THIS SMOKE/CO ALARM:
• In garages, furnace rooms, crawl spaces and unfinished attics.
Avoid extremely dusty, dirty or greasy areas.
WHERE THIS ALARM SHOULD NOT BE INSTALLED - DO NOT
LOCATE THIS SMOKE/CO ALARM (CONTINUED)...
• Where combustion particles are produced. Combustion particles form when something burns.
Areas to avoid include poorly ventilated kitchens, garages, and furnace rooms. Keep units at
least 20 feet (6 meters) from the sources of combustion particles (stove, furnace, water heater,
space heater) if possible. In areas where a 20-foot (6 meter) distance is not possible – in
modular, mobile, or smaller homes, for example – it is recommended the Smoke Alarm be
placed as far from these fuel-burning sources as possible. The placement recommendations
are intended to keep these Alarms at a reasonable distance from a fuel-burning source,
and thus reduce “unwanted” alarms. Unwanted alarms can occur if a Smoke Alarm is
placed directly next to a fuel-burning source. Ventilate these areas as much as possible.
• Within 5 feet (1.5 meters) of any cooking appliance. In air streams near kitchens. Air
currents can draw cooking smoke into the smoke sensor and cause unwanted alarms.
• In extremely humid areas. This Alarm should be at least 10 feet (3 meters) from a shower, sauna,
humidifier, vaporizer, dishwasher, laundry room, utility room, or other source of high humidity.
• In direct sunlight.
• In turbulent air, like near ceiling fans or open windows. Blowing air
may prevent CO or smoke from reaching the sensors.
• In areas where temperature is colder than 40˚ F (4.4˚ C) or hotter than 100˚F
(37.8˚ C). These areas include non-airconditioned crawl spaces, unfinished
attics, uninsulated or poorly insulated ceilings, porches, and garages.
• In insect infested areas. Insects can clog the openings to the sensing chamber.
• Less than 12 inches (305 mm) away from fluorescent lights.
Electrical “noise” can interfere with the sensor.
• In “dead air” spaces. See “Avoiding Dead Air Spaces”.
AVOIDING DEAD AIR SPACES
“Dead air” spaces may prevent smoke from reaching the Smoke/CO Alarm. To
avoid dead air spaces, follow installation recommendations below.
On ceilings, install Smoke/CO Alarms as close to the center of the ceiling as possible. If this is
not possible, install the Smoke/CO Alarm at least 4 inches (102 mm) from the wall or corner.
For wall mounting (if allowed by building codes), the top edge of Smoke/
CO Alarms should be placed between 4 inches (102 mm) and 12 inches (305
mm) from the wall/ceiling line, below typical “dead air” spaces.
On a peaked, gabled, or cathedral ceiling, install first Smoke/CO Alarm within 3
feet (0.9 meters) of the peak of the ceiling, measured horizontally. Additional Smoke/
CO Alarms may be required depending on the length, angle, etc. of the ceiling’s slope.
Refer to NFPA 72 for details on requirements for sloped or peaked ceilings.
WEEKLY TESTING
• NEVER use an open flame of any kind to test this unit. You might accidentally damage
or set fire to the unit or to your home. The built-in test switch accurately tests the
unit’s operation as required by Underwriters Laboratories, Inc. (UL). NEVER use
vehicle exhaust! Exhaust may cause permanent damage and voids your warranty.
• DO NOT stand close to the Alarm when the horn is sounding. Exposure at close range
may be harmful to your hearing. When testing, step away when horn starts sounding.
It is important to test this unit every week to make sure it is working properly.
Using the test button is the recommended way to test this Smoke/CO Alarm.
You can test this Smoke/CO Alarm: Press and hold the Test/
Silence button 3-5 seconds until unit starts to alarm.
During testing, you will see and hear the following sequence:
• The Horn will sound 3 beeps, pause, 3 beeps. The Power/
Smoke LED flashes Red and the CO LED will be Off.
• Next the Horn will sound 4 beeps, pause, 4 beeps. The Power/
Smoke LED will be Off and the CO LED flashes Red.
If the unit does not alarm, make sure the batteries are correctly installed,
and test again. If the unit still does not alarm, replace it immediately.
HOW TO INSTALL THIS ALARM
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This combination Smoke/CO Alarm was designed to be mounted on the ceiling
or wall. It is not a tabletop device. You must install this device on the ceiling or
wall as outlined below. Read “Where To Install This Alarm” before starting.
Tools you will need: pencil, drill with 3/16” or 5mm drill bit, flathead screwdriver, hammer.
PARTS OF THIS SMOKE/CO ALARM
1. Test/Silence Button
2. Battery Compartment
3. Power/Smoke Alarm LED
4. CO Alarm LED
• Do not connect this unit to any other alarm or auxiliary device. It is a
single-station unit that cannot be linked to other devices. Connecting
anything else to this unit may prevent it from working properly.
• Do not install this unit over an electrical junction box. Air currents around junction
boxes can prevent smoke from reaching the sensing chamber and prevent the unit from
alarming. Only AC powered units are intended for installation over junction boxes.
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If you want to lock the battery compartment, or lock the Smoke/CO Alarm to the mounting
bracket, please read the “Optional Locking Features” section located at www.firstalert.com.
1. Hold base firmly and twist the mounting bracket
counterclockwise (left) to separate it from the unit.
2. Hold the mounting bracket against the ceiling (or wall) so the vertical
mounting slot is aligned in the 12 o’clock position and trace around the
inside of the mounting slots (vertical and horizontal mounting).
3. Put the unit where it won’t get covered with dust when you drill the mounting holes.
4. Using a 3/16” (5 mm) drill bit, drill a hole through the center of the oval outlines you traced.
5. Insert the plastic screw anchors (in the plastic bag with screws) into the holes. Tap the screw
anchors gently with a hammer, if necessary, until they are flush with the ceiling or wall.
6. Line the mounting bracket up over the plastic screw anchors.
7. Screw the mounting bracket to the ceiling or wall through the
mounting slots using the two screws provided.
8. Before attaching the Alarm to the
bracket, insert the two (2) AA batteries
(included) into the battery compartment.
Match the terminals on the end of the
battery with the terminals on the unit.
Match “+” to “+” and “-” to “-.” If the
batteries are not fully inserted, the
unit cannot receive battery power.
NOTE: The unit may beep briefly
when you install the batteries. This
is normal. The GREEN Light flashes
about every 60 seconds when the
unit is receiving battery power.
The battery door will resist closing unless batteries are installed.
This warns you the unit will not operate without batteries.
9. Attach the Smoke/CO Alarm to the mounting
bracket. Line up the guides on the alarm’s
base with the guides on the mounting bracket.
When guides are lined up, turn the base
clockwise (right) until it snaps into place.
NOTE: Once the Smoke/CO Alarm is snapped
onto the mounting bracket, you can rotate the
Smoke/CO Alarm to adjust the alignment.
10. Test the Smoke/CO Alarm. See
“Weekly Testing” for details.
OTHER Z-WAVE SYSTEMS
This product can be operated in any Z-Wave network with other Z-Wave certified devices
from other manufacturers. All non-battery operated nodes within the network will act
as repeaters regardless of the vendor to increase the reliability of the network.
ADD
1. Slide battery door open.
2. Insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
REMOVE
1. Slide battery door open.
2. Remove and re-insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
• The alarm will remain awake for 30 seconds on inclusion.
RESET DEVICE
If the device is powered up with the test button held down for 10+ seconds, the device will reset all
Z-Wave settings and leave the network.
Upon completion of the Reset operation, the LED will glow and the horn will sound for ~1 second.
Please use this procedure only when the network primary controller is missing or
otherwise inoperable.
NOTE: The device will not remain awake after resetting and will go into standby mode.
PROCEDURE TO MANUALLY WAKE-UP THE DEVICE
To manual wake-up the device, slide the battery door open wait for ~5 seconds and then slide
the battery drawer closed. Upon power-up, the device will send the wake-up notification.
DSK LOCATION ON THE PRODUCT
The QR code and the 5-digit DSK pin can be found on the product nameplate which is located on
the back of the product. The Full DSK string can be found on the product insert, available inside the
product packaging.
For more information on Z-Wave specifications, visit www.firstalert.com/zwaveinfo.
REGULAR MAINTENANCE
This unit has been designed to be as maintenance-free as possible, but there
are a few simple things you must do to keep it working properly.
• Test it at least once a week.
• Clean the Smoke/CO Alarm at least once a month; gently vacuum the outside of the Smoke/CO
Alarm using your household vacuum’s soft brush attachment. A can of clean compressed air (sold
at computer or office supply stores) may also be used. Follow manufacturer instructions for use.
Test the Smoke/CO Alarm. Never use water, cleaners or solvents since they may damage the unit.
• If the Smoke/CO Alarm becomes contaminated by excessive dirt, dust and/or grime,
and cannot be cleaned to avoid unwanted alarms, replace the unit immediately.
• Relocate the unit if it sounds frequent unwanted alarms. See
“Where This Alarm Should Not Be Installed” for details.
Choosing a replacement battery:
Your Smoke/CO Alarm requires two standard AA batteries. The following batteries are acceptable as
replacements: Energizer E91, Duracell MN1500/LR6. These batteries are available at many local
retail stores.
• Always use the exact batteries specified by this User’s Manual. DO NOT use
rechargeable batteries. Clean the battery contacts and also those of the device prior
to battery installation. Install batteries correctly with regard to polarity (+ and -).
• Please dispose of or recycle used batteries properly, following any local
regulations. Consult your local waste management authority or recycling
organization to find an electronics recycling facility in your area. DO NOT
DISPOSE OF BATTERIES IN FIRE. BATTERIES MAY EXPLODE OR LEAK.
• Constant exposure to high or low temperatures or high humidity may reduce battery life.
• Keep battery out of reach of children. In the event a battery is swallowed,
immediately contact your poison control center, your physician, or the National
Battery Ingestion hotline at 202-625-3333 as serious injury may occur.
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Actual battery service life depends on the Smoke/CO Alarm and the environment in which
it is installed. All the batteries specified above are acceptable replacement batteries for
this unit. Regardless of the manufacturer’s suggested battery life, you MUST replace
the battery immediately once the unit starts “chirping” (the “low battery warning”).
To replace the batteries (without removing
Alarm from the ceiling or wall):
1. Open the battery compartment.
2. Press tabs A and B as shown in the
diagram and remove each battery.
3. Insert the new batteries, making sure they
snap completely into the battery compartment.
Match the terminals on the ends of the
batteries with the terminals on the unit.
4. Close the battery compartment, and then test
the unit by pressing the Test/Silence button.
AB
IF YOUR SMOKE/CO ALARM SOUNDS
WHAT TO DO FIRST–IDENTIFY THE TYPE OF ALARM
Type of Alarm What You See and Hear
Carbon Monoxide (CO)
CO LED: Flashes Red
Horn: 4 beeps, pause, 4 beeps, pause
Power/Smoke LED: Off
Smoke
Power/Smoke LED: Flashes Red
Horn: 3 beeps, pause, 3 beeps, pause
CO LED: Off
IF THE CO ALARM SOUNDS
“ALARM-MOVE TO FRESH AIR”
If you hear the CO alarm horn and the CO red light is flashing, move
everyone to a source of fresh air. DO NOT remove the batteries!
Actuation of your CO Alarm indicates the presence of carbon monoxide (CO) which
can kill you. In other words, when your CO Alarm sounds, you must not ignore it!
IF THE CO ALARM SIGNAL SOUNDS:
1. Operate the Test/Silence button.
2. Call your emergency services, fire department or 911. Write down
the number of your local emergency service here:
__________________________________________________________________
3. Immediately move to fresh air—outdoors or by an open door or window. Do a head count
to check that all persons are accounted for. Do not re-enter the premises, or move away
from the open door or window until the emergency services responder has arrived, the
premises have been aired out, and your CO Alarm remains in its normal condition.
4. After following steps 1-3, if your CO Alarm reactivates within a 24-hour period, repeat steps
1-3 and call a qualified appliance technician to investigate for sources of CO from fuel-burning
equipment and appliances, and inspect for proper operation of this equipment. If problems are
identified during this inspection have the equipment serviced immediately. Note any combustion
equipment not inspected by the technician, and consult the manufacturers’ instructions, or
contact the manufacturers directly, for more information about CO safety and this equipment.
Make sure that motor vehicles are not, and have not, been operating in an attached garage or
adjacent to the residence. Write down the number of a qualified appliance technician here:
__________________________________________________________________
NOTE: A qualified appliance technician is defined as “a person, firm, corporation, or company that
either in person or through a representative, is engaged in and responsible for the installation, testing,
servicing, or replacement of heating, ventilation, air conditioning (HVAC) equipment, combustion
appliances and equipment, and/or gas fireplaces or other decorative combustion equipment.”
IF THE SMOKE ALARM SOUNDS
RESPONDING TO AN ALARM
• If the unit alarms and you are not testing the unit, it is warning you of a
potentially dangerous situation that requires your immediate attention. NEVER
ignore any alarm. Ignoring the alarm may result in injury or death.
• Never remove the batteries from a battery operated Smoke/CO Alarm to stop an
unwanted alarm (caused by cooking smoke, etc.). Removing batteries disables
the alarm so it cannot sense smoke, and removes your protection. Instead open a
window or fan the smoke away from the unit. The alarm will reset automatically.
• If the unit alarms get everyone out of the house immediately.
WHAT TO DO IN CASE OF FIRE
Don’t panic; stay calm. Follow your family escape plan.
Get out of the house as quickly as possible. Don’t stop to get dressed or collect anything.
Feel doors with the back of your hand before opening them. If a door is cool, open it slowly.
Don’t open a hot door. Keep doors and windows closed, unless you must escape through them.
Cover your nose and mouth with a cloth (preferably damp). Take short, shallow breaths.
Meet at your planned meeting place outside your home, and do a
head count to make sure everybody got out safely.
Call the Fire Department as soon as possible from outside. Give your address, then your name.
Never go back inside a burning building for any reason.
Contact your Fire Department for ideas on making your home safer.
Alarms have various limitations. See “General Limitations of Smoke/CO Alarms” for details.
USING THE SILENCE FEATURES
Never remove the batteries to quiet an unwanted alarm. Removing the
batteries disables the alarm and removes your protection.
The Silence Feature is intended to temporarily silence the horn while you
identify and correct the problem. Do not use the Silence Feature in emergency
situations. It will not correct a CO problem or extinguish a fire.
The Silence Feature can temporarily quiet an unwanted alarm for several minutes.
Press the Test/Silence button on the alarm cover for at least 3-5 seconds.
After the Test/Silence button is released, the Red LED blinks during the silence mode.
When the Smoke Alarm is Silenced When the CO Alarm is Silenced
The Smoke Alarm will remain silent for up to
15 minutes, then return to normal operation.
If the smoke has not cleared–or continues to
increase–the device will go back into alarm.
The CO alarm will remain silent
for up to 4 minutes.
After 4 minutes, if CO levels remain potentially
dangerous the horn will start sounding again.
SILENCING THE LOW BATTERY WARNING
This silence feature can temporarily quiet the low battery warning “chirp” for
up to 8 hours. Press the Test/Silence button on the alarm cover.
Once the low battery warning “chirp” silence feature is activated, the unit continues to flash the
Green light once a minute for 8 hours. After 8 hours, the low battery “chirp” will resume. Replace
the batteries as soon as possible; this unit will not operate without battery power!
To deactivate this feature: Press the Test/Silence button again. The unit will go into Test Mode
and the low battery warning will resume (LED flashes and unit sounds “chirp” once a minute).
SILENCING THE END OF LIFE SIGNAL
This silence feature can temporarily quiet the End of Life warning “chirp” for up to 2 days.
You can silence the End of Life warning “chirp” by pressing the Test/Silence button. The
horn will chirp, acknowledging that the End of Life silence feature has been activated.
After approximately 2 days, the End of Life “chirp” will resume.
WHAT YOU NEED TO KNOW ABOUT CO
WHAT IS CO?
CO is an invisible, odorless, tasteless gas produced when fossil fuels do not burn completely,
or are exposed to heat (usually fire). Electrical appliances typically do not produce CO.
These fuels include: Wood, coal, charcoal, oil, natural gas, gasoline, kerosene, and propane.
Common appliances are often sources of CO. If they are not properly maintained,
are improperly ventilated, or malfunction, CO levels can rise quickly. CO is a real
danger now that homes are more energy efficient. “Air-tight” homes with added
insulation, sealed windows, and other weatherproofing can “trap” CO inside.
SYMPTOMS OF CO POISONING
These symptoms are related to CO POISONING and should
be discussed with ALL household members.
Mild Exposure: Slight headache, nausea, vomiting, fatigue (“flu-like” symptoms).
Medium Exposure: Throbbing headache, drowsiness, confusion, fast heart rate.
Extreme Exposure: Convulsions, unconsciousness, heart and lung failure.
Exposure to Carbon Monoxide can cause brain damage, death.
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This CO Alarm measures exposure to CO over time. It alarms if CO levels are extremely
high in a short period of time, or if CO levels reach a certain minimum over a long period of
time. The CO Alarm generally sounds an alarm before the onset of symptoms in average,
healthy adults. Why is this important? Because you need to be warned of a potential CO
problem while you can still react in time. In many reported cases of CO exposure, victims
may be aware that they are not feeling well, but become disoriented and can no longer
react well enough to exit the building or get help. Also, young children and pets may be the
first affected. The average healthy adult might not feel any symptoms when the CO Alarm
sounds. However, people with cardiac or respiratory problems, infants, unborn babies,
pregnant mothers, or elderly people can be more quickly and severely affected by CO. If
you experience even mild symptoms of CO poisoning, consult your doctor immediately!
FINDING THE SOURCE OF CO AFTER AN ALARM
Carbon monoxide is an odorless, invisible gas, which often makes it difficult to locate the source of
CO after an alarm. These are a few of the factors that can make it difficult to locate sources of CO:
• House well ventilated before the investigator arrives.
• Problem caused by “backdrafting.”
• Transient CO problem caused by special circumstances.
Because CO may dissipate by the time an investigator arrives, it may be
difficult to locate the source of CO. BRK Brands, Inc. shall not be obligated
to pay for any carbon monoxide investigation or service call.
POTENTIAL SOURCES OF CO IN THE HOME
Fuel-burning appliances like: portable
heater, gas or wood burning fireplace, gas
kitchen range or cooktop, gas clothes dryer.
Damaged or insufficient venting:
corroded or disconnected water heater
vent pipe, leaking chimney pipe or flue,
or cracked heat exchanger, blocked
or clogged chimney opening.
Improper use of appliance/
device: operating a barbecue grill
or vehicle in an enclosed area (like
a garage or screened porch).
Transient CO Problems: “transient”
or on-again-off-again CO problems
can be caused by outdoor conditions
and other special circumstances.
The following conditions can result in transient CO situations:
1. Excessive spillage or reverse venting of fuel appliances caused by outdoor conditions such as:
• Wind direction and/or velocity, including high, gusty winds. Heavy air in the
vent pipes (cold/humid air with extended periods between cycles).
• Negative pressure differential resulting from the use of exhaust fans.
• Several appliances running at the same time competing for limited fresh air.
• Vent pipe connections vibrating loose from clothes dryers, furnaces, or water heaters.
• Obstructions in or unconventional vent pipe designs which can amplify the above situations.
2. Extended operation of unvented fuel burning devices (range, oven, fireplace).
3. Temperature inversions, which can trap exhaust close to the ground.
4. Car idling in an open or closed attached garage, or near a home.
These conditions are dangerous because they can trap exhaust in your home. Since these
conditions can come and go, they are also hard to recreate during a CO investigation.
HOW CAN I PROTECT MY FAMILY
FROM CO POISONING?
A CO Alarm is an excellent means of protection. It monitors the air and sounds a loud
alarm before Carbon Monoxide levels become threatening for average, healthy adults.
A CO Alarm is not a substitute for proper maintenance of home appliances.
To help prevent CO problems and reduce the risk of CO poisoning:
• Clean chimneys and flues yearly. Keep them free of debris, leaves, and nests for
proper air flow. Also, have a professional check for rust and corrosion, cracks,
or separations. These conditions can prevent proper air movement and cause
backdrafting. Never “cap” or cover a chimney in any way that would block air flow.
• Test and maintain all fuel-burning equipment annually. Many local gas or oil
companies and HVAC companies offer appliance inspections for a nominal fee.
• Make regular visual inspections of all fuel-burning appliances. Check appliances for
excessive rust and scaling. Also check the flame on the burner and pilot lights. The
flame should be blue. A yellow flame means fuel is not being burned completely and CO
may be present. Keep the blower door on the furnace closed. Use vents or fans when
they are available on all fuel-burning appliances. Make sure appliances are vented to
the outside. Do not grill or barbecue indoors, or in garages or on screen porches.
• Check for exhaust backflow from CO sources. Check the draft hood on an operating
furnace for a backdraft. Look for cracks on furnace heat exchangers.
• Check the house or garage on the other side of shared wall.
• Keep windows and doors open slightly. If you suspect that CO is escaping into your home,
open a window or a door. Opening windows and doors can significantly decrease CO levels.
In addition, familiarize yourself with all enclosed materials. Read this manual in its
entirety, and make sure you understand what to do if your CO Alarm sounds.
REGULATORY INFORMATION FOR SMOKE/CO ALARMS
REGULATORY INFORMATION FOR CO ALARMS
WHAT LEVELS OF CO CAUSE AN ALARM?
Underwriters Laboratories Inc. Standard UL2034 requires residential CO Alarms
to sound when exposed to levels of CO and exposure times as described below.
They are measured in parts per million (ppm) of CO over time (in minutes).
UL2034 Required Alarm Points*:
• If the alarm is exposed to 400 ppm of CO, IT MUST ALARM BETWEEN 4 and 15 MINUTES.
• If the alarm is exposed to 150 ppm of CO, IT MUST ALARM BETWEEN 10 and 50 MINUTES.
• If the alarm is exposed to 70 ppm if CO, IT MUST ALARM BETWEEN 60 and 240 MINUTES.
*Approximately 10% COHb exposure at levels of 10% to 95% Relative Humidity (RH).
The unit is designed not to alarm when exposed to a constant level of 30 ppm for 30 days.
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CO Alarms are designed to alarm before there is an immediate life threat.
Since you cannot see or smell CO, never assume it’s not present.
• An exposure to 100 ppm of CO for 20 minutes may not affect average, healthy
adults, but after 4 hours the same level may cause headaches.
• An exposure to 400 ppm of CO may cause headaches in average, healthy
adults after 35 minutes, but can cause death after 2 hours.
Standards: Underwriters Laboratories Inc. Single and Multiple
Station carbon monoxide alarms UL2034.
According to Underwriters Laboratories Inc. UL2034, Section 1-1.2: “Carbon monoxide alarms
covered by these requirements are intended to respond to the presence of carbon monoxide from
sources such as, but not limited to, exhaust from internal-combustion engines, abnormal operation
of fuel-fired appliances, and fireplaces. CO Alarms are intended to alarm at carbon monoxide
levels below those that could cause a loss of ability to react to the dangers of Carbon Monoxide
exposure.” This CO Alarm monitors the air at the Alarm, and is designed to alarm before CO levels
become life threatening. This allows you precious time to leave the house and correct the problem.
This is only possible if Alarms are located, installed, and maintained as described in this manual.
Gas Detection at Typical Temperature and Humidity Ranges: The CO Alarm is not formulated
to detect CO levels below 30 ppm typically. UL tested for false alarm resistance to Methane (500
ppm), Butane (300 ppm), Heptane (500 ppm), Ethyl Acetate (200 ppm), Isopropyl Alcohol (200 ppm)
and Carbon Dioxide (5000 ppm). Values measure gas and vapor concentrations in parts per million.
Audible Alarm: 85 dB minimum at 10 feet (3 meters).
Printed in Mexico M08-0456-169793_1044807 K1 02/20
REGULATORY INFORMATION FOR SMOKE ALARMS
RECOMMENDED LOCATIONS FOR SMOKE ALARMS
Installing Smoke Alarms in Single-Family Residences
The National Fire Protection Association (NFPA), recommends one Smoke Alarm on every floor,
in every sleeping area, and in every bedroom. In new construction, the Smoke Alarms must be
AC powered and interconnected. See “Agency Placement Recommendations” for details.
For additional coverage, it is recommended that you install a Smoke Alarm in all
rooms, halls, storage areas, finished attics, and basements, where temperatures
normally remain between 40˚ F (4.4˚ C) and 100˚ F (37.8˚ C). Make sure no door or
other obstruction could keep smoke from reaching the Smoke Alarms.
More specifically, install Smoke Alarms:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet long (12 meters), install a unit at each end.
• At the top of the first-to-second floor stairway, and at the bottom of the basement stairway.
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Specific requirements for Smoke Alarm installation vary from state to state and from region to region.
Check with your local Fire Department for current requirements in your area. It is recommended AC
or AC/DC units be interconnected for added protection.
AGENCY PLACEMENT RECOMMENDATIONS
Standards: Underwriters Laboratories Inc. Single and Multiple Station Smoke Alarms 217.
NFPA 72 Chapter 29
“For your information, the National Fire Alarm and Signaling Code, NFPA 72, reads as follows:”
29.5.1* Required Detection.
29.5.1.1* Where required by other governing laws, codes, or standards for a specific type of
occupancy, approved single and multiple-station smoke alarms shall be installed as follows:
(1) *In all sleeping rooms and guest rooms
(2) *Outside of each separate dwelling unit sleeping area, within 21 ft (6.4 m) of any
door to a sleeping room, with the distance measured along a path of travel
(3) On every level of a dwelling unit, including basements
(4) On every level of a residential board and care occupancy (small facility),
including basements and excluding crawl spaces and unfinished attics
(5) *In the living area(s) of a guest suite
(6) In the living area(s) of a residential board and care occupancy (small facility)
(Reprinted with permission from NFPA 72®, National Fire Alarm and Signaling Code Copyright © 2010
National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the complete
and official position of the National Fire Protection Association, on the referenced subject which is
represented only by the standard in its entirety), (National Fire Alarm and Signaling Code®and NFPA
72®are registered trademarks of the National Fire Protection Association, Inc., Quincy, MA 02269).
California State Fire Marshal (CSFM)
Early warning detection is best achieved by the installation of fire detection equipment
in all rooms and areas of the household as follows: A Smoke Alarm installed in each
separate sleeping area (in the vicinity, but outside bedrooms), and Heat or Smoke Alarms
in the living rooms, dining rooms, bedrooms, kitchens, hallways, finished attics, furnace
rooms, closets, utility and storage rooms, basements, and attached garages.
ABOUT SMOKE ALARMS
Battery (DC) operated Smoke Alarms: Provide protection even when
electricity fails, provided the batteries are fresh and correctly installed. Units
are easy to install, and do not require professional installation.
AC powered Smoke Alarms: Can be interconnected so if one unit senses smoke,
all units alarm. They do not operate if electricity fails. AC with battery (DC) back-
up: will operate if electricity fails, provided the batteries are fresh and correctly
installed. AC and AC/DC units must be installed by a qualified electrician.
Smoke/CO Alarms for Solar or Wind Energy users and battery backup power systems:
AC powered Smoke/CO Alarms should only be operated with true or pure sine wave inverters.
Operating this Alarm with most battery-powered UPS (uninterruptible power supply) products
or square wave or “quasi sine wave” inverters will damage the Alarm. If you are not sure
about your inverter or UPS type, please consult with the manufacturer to verify.
Smoke Alarms for the hearing impaired: Special purpose Smoke Alarms should
be installed for the hearing impaired. They include a visual alarm and an audible
alarm horn, and meet the requirements of the Americans With Disabilities Act.
Can be interconnected so if one unit senses smoke, all units alarm.
ABOUT SMOKE ALARMS (CONTINUED)...
Smoke alarms are not to be used with detector guards unless the
combination has been evaluated and found suitable for that purpose.
All these Smoke Alarms are designed to provide early warning of fires if located, installed and
cared for as described in the user’s manual, and if smoke reaches the Alarm. If you are unsure
which type of Smoke Alarm to install, refer the National Fire Protection Association (NFPA)
Standard 72 (National Fire Alarm and Signaling Code) and NFPA 101 (Life Safety Code). National
Fire Protection Association, One Batterymarch Park, Quincy, MA 02269-9101. Local building
codes may also require specific units in new construction or in different areas of the home.
SPECIAL COMPLIANCE CONSIDERATIONS
This Smoke Alarm is suitable for use in apartments, condominiums, townhouses, hospitals, day
care facilities, health care facilities, boarding houses, group homes and dormitories provided
a primary fire detection system already exists to meet fire detection requirements in common
areas like lobbies, hallways, or porches. Using this Smoke Alarm in common areas may not
provide sufficient warning to all residents or meet local fire protection ordinances/regulations.
This Smoke Alarm alone is not a suitable substitute for complete fire detection systems
in places housing many people—like apartment buildings, condominiums, hotels, motels,
dormitories, hospitals, health care facilities, nursing homes, day care facilities, or group homes
of any kind. It is not a suitable substitute for complete fire detection systems in warehouses,
industrial facilities, commercial buildings, and special-purpose non-residential buildings which
require special fire detection and alarm systems. Depending on the building codes in your
area, this Smoke Alarm may be used to provide additional protection in these facilities.
In new construction, most building codes require the use of AC or AC/DC powered Smoke
Alarms only. In existing construction, AC, AC/DC, or DC powered Smoke Alarms can be used
as specified by local building codes. Refer to NFPA 72 (National Fire Alarm and Signaling
Code) and NFPA 101 (Life Safety Code), local building codes, or consult your Fire Department
for detailed fire protection requirements in buildings not defined as “households”.
HUD MAP PROGRAM
Certain HUD battery powered Smoke Alarm applications, especially those that fall under
HUD 223(f) MAP (Multi-family Accelerated Processing), may require a 10 Year sealed tamper
resistant battery. This alarm does not meet that requirement. Substitute First Alert SA340B.
GENERAL LIMITATIONS OF SMOKE/CO ALARMS
This Smoke/CO Alarm is intended for residential use. It is not intended for use in industrial
applications where Occupational Safety and Health Administration (OSHA) requirements for
Carbon Monoxide Alarms must be met. The Smoke Alarm portion of this device is not intended
to alert hearing impaired residents. Special purpose Smoke Alarms should be installed for
hearing impaired residents (CO Alarms are not yet available for the hearing impaired).
Smoke/CO Alarms may not waken all individuals. Practice the escape plan at least twice a year,
making sure that everyone is involved – from kids to grand- parents. Allow children to master fire
escape planning and practice before holding a fire drill at night when they are sleeping. If children
or others do not readily waken to the sound of the Smoke/CO Alarm, or if there are infants or
family members with mobility limitations, make sure that someone is assigned to assist them in
fire drill and in the event of an emergency. It is recommended that you hold a fire drill while family
members are sleeping in order to determine their response to the sound of the Smoke/CO Alarm
while sleeping and to determine whether they may need assistance in the event of an emergency.
Smoke/CO Alarms cannot work without power. Battery operated units cannot work if the batteries
are missing, disconnected or dead, if the wrong type of batteries are used, or if the batteries are not
installed correctly. AC units cannot work if the AC power is cut off for any reason (open fuse or circuit
breaker, failure along a power line or at a power station, electrical fire that burns the electrical wires,
etc.). If you are concerned about the limitations of battery or AC power, install both types of units.
This Smoke/CO Alarm will not sense smoke or CO that does not reach the sensors. It will
only sense smoke or CO at the sensor. Smoke or CO may be present in other areas. Doors or other
obstructions may affect the rate at which CO or smoke reaches the sensors. If bedroom doors are
usually closed at night, we recommend you install an alarm device (Combination CO and Smoke
Alarm, or separate CO Alarms and Smoke Alarms) in each bedroom and in the hallway between them.
This Smoke/CO Alarm may not sense smoke or CO on another level of the home. Example:
This alarm device, installed on the second floor, may not sense smoke or CO in the basement.
For this reason, one alarm device may not give adequate early warning. Recommended minimum
protection is one alarm device in every sleeping area, every bedroom, and on every level of your
home. Some experts recommend battery powered Smoke and CO Alarms be used in conjunction
with interconnected AC powered Smoke Alarms. For details, see “About Smoke Alarms” for details.
Smoke/CO Alarms may not be heard. The alarm horn loudness meets or exceeds current
UL standards of 85 dB at 10 feet (3 meters). However, if the Smoke/CO Alarm is installed
outside the bedroom, it may not wake up a sound sleeper or one who has recently used
drugs or has been drinking alcoholic beverages. This is especially true if the door is closed
or only partly open. Even persons who are awake may not hear the alarm horn if the sound
is blocked by distance or closed doors. Noise from traffic, stereo, radio, television, air
conditioner, or other appliances may also prevent alert persons from hearing the alarm
horn. This Smoke/CO Alarm is not intended for people who are hearing impaired.
The Alarm may not have time to alarm before the fire itself causes damage,
injury, or death, since smoke from some fires may not reach the unit
immediately. Examples of this include persons smoking in bed, children playing with
matches, or fires caused by violent explosions resulting from escaping gas.
This Smoke/CO Alarm is not a substitute for life insurance. Though this Smoke/CO Alarm
warns against increasing CO levels or the presence of smoke, BRK Brands, Inc. does not warrant or
imply in any way that they will protect lives. Homeowners and renters must still insure their lives.
This Smoke/CO Alarm has a limited life. Although this Smoke/CO Alarm and all
of its parts have passed many stringent tests and are designed to be as reliable as
possible, any of these parts could fail at any time. Therefore, you must test this device
weekly. The unit should be replaced immediately if it is not operating properly.
This Smoke/CO Alarm is not foolproof. Like all other electronic devices, this Smoke/CO Alarm
has limitations. It can only detect smoke or CO that reaches the sensors. It may not give early
warning of the source of smoke or CO is in a remote part of the home, away from the alarm device.
Z-Wave Mesh Network Limitations 1. Alarms are single stationed Alarms and are
not interconnected to each other. 2. Only initiating Alarms will sound. 3. Z-Wave
system is not listed as a life safety system. Mesh network system only provides
supplemental notifications and should not be counted on for life safety.
TROUBLESHOOTING GUIDE
IF THE ALARM... PROBLEM... YOU SHOULD...
Horn “chirps” and LED flashes GREEN about once per minute. Low battery warning. Install two new AA batteries*.
Horn “chirps” 3 times every minute; LED
flashes GREEN 3 rapid flashes.
MALFUNCTION SIGNAL. Device is not working
properly, and needs to be replaced.
Units under warranty should be returned to manufacturer
for replacement. See “Limited Warranty” for details.
Horn “chirps” 5 times every minute; LED
flashes GREEN 5 rapid flashes. END OF LIFE SIGNAL. Alarm needs to be replaced. Immediately replace the Alarm.
Carbon Monoxide Alarm ONLY:
CO Alarm goes back into alarm 4 minutes after you Silence it. CO levels indicate a potentially dangerous situation.
IF YOU ARE FEELING SYMPTOMS OF CO POISONING,
EVACUATE your home and call 911 or the Fire Department.
Refer to “If The CO Alarm Sounds” for details.
CO Alarm sounds frequently even though no high
levels of CO are revealed in an investigation.
The CO Alarm may be improperly located. Refer
to “Where to Install This Alarm” for details.
Relocate your Alarm. If frequent alarms continue, have
home rechecked for potential CO problems. You may
be experiencing an intermittent CO problem.
Smoke Alarm ONLY:
Smoke Alarm sounds when no smoke is visible. Unwanted alarm may be caused by non-
emergency source like cooking smoke.
Silence Alarm using manual button; clean the Alarm’s
cover with a soft, clean cloth. If frequent unwanted alarms
continue, relocate your Alarm. Alarm may be too close to
a kitchen, cooking appliance, or steamy bathroom.
*For a list of acceptable replacement batteries, see “Regular Maintenance.”
If you have any questions that cannot be answered by reading this manual, call the Customer Service Team: 1-800-323-9005.
LIMITED WARRANTY
BRK Brands, Inc., (“BRK”) the maker of First Alert®brand and BRK®brand products, warrants that for a period of ten years from the date of purchase, this product will be free from defects in
material and workmanship. BRK, at its option, will repair or replace this product or any component of the product found to be defective during the warranty period. Replacement will be made with a
new or remanufactured product or component. If the product is no longer available, replacement may be made with a similar product of equal or greater value. This is your exclusive warranty.
This warranty is valid for the original retail purchaser from the date of initial retail purchase and is not transferable. Keep the original sales receipt. Proof of purchase is required to obtain warranty
performance. BRK dealers, service centers, or retail stores selling BRK products do not have the right to alter, modify or any way change the terms and conditions of this warranty.
This warranty does not cover normal wear of parts or damage resulting from any of the following: negligent use or misuse of the product, use on improper
voltage or current, use contrary to the operating instructions, disassembly, repair or alteration by anyone other than BRK or an authorized service center. Further,
the warranty does not cover Acts of God, such as fire, flood, hurricanes and tornadoes or any batteries that are included with this unit.
BRK shall not be liable for any incidental or consequential damages caused by the breach of any express or implied warranty. Except to the extent prohibited by applicable law,
any implied warranty of merchantability or fitness for a particular purpose is limited in duration to the duration of the above warranty. Some states, provinces or jurisdictions
do not allow the exclusion or limitation of incidental or consequential damages or limitations on how long an implied warranty lasts, so the above limitations or exclusion
may not apply to you. This warranty gives you specific legal rights, and you may also have other rights that vary from state to state or province to province.
How to Obtain Warranty Service
Service: If service is required, do not return the product to your retailer. In order to obtain warranty service, contact the Customer Service Team at
1-800-323-9005. To assist us in serving you, please have the model number and date of purchase available when calling.
For Warranty Service return to: 1301 Joe Battle, El Paso, TX 79936
Battery: BRK Brands, Inc. make no warranty, express or implied, written or oral, including that of merchantability or fitness for any particular purpose with respect to battery.
Visit www.firstalert.com for more information.
For your records, please record:
Date Purchased: ______________/_________________Month/Year
Where Purchased: ____________________________________________
Date Installed: ____________/____________Month/Year
Replace alarm 7 years after installation. Please write the date in the
space provided: __________/__________ Month/Year
The alarm will also provide an audible End-of-Life Signal approximately
7 years after installation to remind you to replace the unit.
The End-of-Life Signal can be silenced for up to 2 days. Do not unplug
the alarm or remove the batteries until you get replacement.
A copy of the manual can be found at www.firstalert.com/products.

123456
USER’S MANUAL
COMBINATION CARBON
MONOXIDE & SMOKE ALARM
IMPORTANT! PLEASE READ CAREFULLY AND SAVE.
This user’s manual contains important information about your Combination Carbon
Monoxide & Smoke Alarm’s operation. If you are installing this Alarm for use by
others, you must leave this manual— or a copy of it—with the end user.
Separate sensors to detect smoke and CO;
the two alarm systems work independently
Powered by two “AA” batteries
Side access drawer for easy battery replacement
Printed in Mexico
M08-0456-169793_1044807 K1 02/20
CONFORMS TO
UL STD 217 AND UL STD 2034 Model ZCOMBO
Sku 1044807
© 2020 BRK Brands, Inc. All rights reserved. •Distributed by BRK Brands, Inc.
Aurora, IL 60504 •BRK Brands, Inc. is a subsidiary of Newell Brands Inc. (NASDAQ: NWL)
Customer Service Team: [phone] •www.firstalert.com •www.brkelectronics.com
All First Alert®and BRK®Smoke Alarms conform to regulatory requirements,
including UL217 and are designed to detect particles of combustion. Smoke
particles of varying number and size are produced in all fires.
Ionization technology is generally more sensitive than photoelectric technology at
detecting small particles, which tend to be produced in greater amounts by flaming
fires, which consume combustible materials rapidly and spread quickly. Sources of
these fires may include paper burning in a wastebasket, or a grease fire in the kitchen.
Photoelectric technology is generally more sensitive than ionization technology
at detecting large particles, which tend to be produced in greater amounts
by smoldering fires, which may smolder for hours before bursting into flame.
Sources of these fires may include cigarettes burning in couches or bedding.
For maximum protection, use both types of Smoke Alarms on
each level and in every bedroom of your home.
INTRODUCTION
FIRE SAFETY TIPS
Follow safety rules and prevent hazardous situations: 1) Use smoking materials properly. Never
smoke in bed. 2) Keep matches or lighters away from children; 3) Store flammable materials in
proper containers; 4) Keep electrical appliances in good condition and don’t overload electrical
circuits; 5) Keep stoves, barbecue grills, fireplaces and chimneys grease- and debris-free; 6)
Never leave anything cooking on the stove unattended; 7) Keep portable heaters and open
flames, like candles, away from flammable materials; 8) Don’t let rubbish accumulate.
Keep alarms clean, and test them weekly. Replace alarms immediately if they are not working
properly. Smoke Alarms that do not work cannot alert you to a fire. Keep at least one working
fire extinguisher on every floor, and an additional one in the kitchen. Have fire escape ladders
or other reliable means of escape from an upper floor in case stairs are blocked.
BASIC SAFETY INFORMATION
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• Dangers, Warnings, and Cautions alert you to important operating instructions
or to potentially hazardous situations. Pay special attention to these items.
• This Smoke/CO Alarm is approved for use in single-family
residences. It is NOT designed for marine or RV use.
• This combination Smoke/Carbon Monoxide Alarm has two separate alarms. The CO
Alarm is not designed to detect fire or any other gas. It will only indicate the presence
of carbon monoxide gas at the sensor. Carbon monoxide gas may be present in
other areas. The Smoke Alarm will only indicate the presence of smoke that reaches
the sensor. The Smoke Alarm is not designed to sense gas, heat or flames.
• This Smoke/CO Alarm cannot operate without working batteries.
Removing the batteries for any reason, or failing to replace the batteries
at the end of their service life, removes your protection.
• NEVER ignore any alarm. See “If Your Smoke/CO Alarm Sounds” for more information
on how to respond to an alarm. Failure to respond can result in injury or death.
• The Silence Features are for your convenience only and will not correct a problem.
See “Using the Silence Features” for details. Always check your home for a
potential problem after any alarm. Failure to do so can result in injury or death.
• Test this Smoke/CO Alarm once a week. If the Alarm ever fails to test correctly, have it
replaced immediately! If the Alarm is not working properly, it cannot alert you to a problem.
• This product is intended for use in ordinary indoor locations of family living units.
It is not designed to measure CO levels in compliance with Occupational Safety
and Health Administration (OSHA) commercial or industrial standards. Individuals
with medical conditions that may make them more sensitive to carbon monoxide
may consider using warning devices which provide audible and visual signals
for carbon monoxide concentrations under 30 ppm. For additional information
on carbon monoxide and your medical condition contact your physician.
FCC COMPLIANCE
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that the interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that of the receiver.
• Consult the dealer or an experienced radio or TV technician for help.
Changes or modifications to the product, not expressly approved by First Alert /
BRK Brands, Inc., could void the user’s authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
INSTALLATION
WHERE TO INSTALL THIS ALARM
Minimum coverage for Smoke Alarms, as recommended by the National Fire Protection
Association (NFPA), is one Smoke Alarm on every floor, in every sleeping area, and in every bedroom
(See “Regulatory Information For Smoke Alarms” for details on the NFPA recommendations).
For CO Alarms, the National Fire Protection Association (NFPA) recommends that
a CO Alarm should be centrally located outside of each separate sleeping area in
the immediate vicinity of the bedrooms. For added protection, install additional
CO Alarms in each separate bedroom, and on every level of your home.
NOTE: For added protection, install an additional Smoke/CO Alarm at least 15 feet (4.6 meters)
away from the furnace or fuel burning heat source where possible. In smaller homes or in
manufactured homes where this distance cannot be maintained, install the Alarm as far away as
possible from the furnace or other fuel burning source. Installing the Alarm closer than 15 feet
(4.6 meters) will not harm the Alarm, but may increase the frequency of unwanted alarms.
To pair this ZCOMBO alarm to a Ring or other compatible Z-Wave network, download the
appropriate App and follow the instructions to Set up Device or Connect Device.
IN GENERAL, INSTALL COMBINATION SMOKE AND CARBON MONOXIDE ALARMS:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet (12 meters) long, install a unit at each end.
• At the top of first-to-second floor stairs.
• At the bottom of the basement stairs.
• For additional coverage, install Alarms in all rooms, halls, and storage areas, where
temperatures normally remain between 40˚ F and 100˚ F (4.4˚ C and 37.8˚ C).
RECOMMENDED PLACEMENT
SUGGESTED AREAS FOR INSTALLING 
SMOKE ALARMS, CO ALARMS, AND COMBO UNITS
SMOKE ALARM WITH 
SILENCE FEATURE
CO ALARMS
BOTH, OR COMBINATION 
SMOKE/CO ALARMS
SMOKE ALARMS
KEY:
Suggested locations are based on
NFPA recommendations (NFPA 72 
for Smoke Alarms and NFPA 720 for
Carbon Monoxide Alarms). Always 
refer to national and local codes 
before beginning any installation.
In new construction AC and AC/DC smoke alarms MUST
be interconnected to meet NFPA recommendations.

• When installing on the wall, the top edge of Smoke Alarms should be placed
between 4 inches (102 mm) and 12 inches (305 mm) from the wall/ceiling line.
• When installing on the ceiling, place the alarm as close to the center as possible.
• In either case, install at least 4 inches (102 mm) from where the wall and
ceiling meet. See “Avoiding Dead Air Spaces” for more information.
NOTE: For any location, make sure no door or other obstruction could
keep carbon monoxide or smoke from reaching the Alarm.
Installing Smoke/CO Alarms in Mobile Homes
For minimum security install one Smoke/CO Alarm as close to each sleeping area as possible.
For more security, put one unit in each room. Many older mobile homes (especially those built
before 1978) have little or no insulation. If your mobile home is not well insulated, or if you
are unsure of the amount of insulation, it is important to install units on inside walls only.
WHERE THIS ALARM SHOULD NOT BE INSTALLED
DO NOT LOCATE THIS SMOKE/CO ALARM:
• In garages, furnace rooms, crawl spaces and unfinished attics.
Avoid extremely dusty, dirty or greasy areas.
WHERE THIS ALARM SHOULD NOT BE INSTALLED - DO NOT
LOCATE THIS SMOKE/CO ALARM (CONTINUED)...
• Where combustion particles are produced. Combustion particles form when something burns.
Areas to avoid include poorly ventilated kitchens, garages, and furnace rooms. Keep units at
least 20 feet (6 meters) from the sources of combustion particles (stove, furnace, water heater,
space heater) if possible. In areas where a 20-foot (6 meter) distance is not possible – in
modular, mobile, or smaller homes, for example – it is recommended the Smoke Alarm be
placed as far from these fuel-burning sources as possible. The placement recommendations
are intended to keep these Alarms at a reasonable distance from a fuel-burning source,
and thus reduce “unwanted” alarms. Unwanted alarms can occur if a Smoke Alarm is
placed directly next to a fuel-burning source. Ventilate these areas as much as possible.
• Within 5 feet (1.5 meters) of any cooking appliance. In air streams near kitchens. Air
currents can draw cooking smoke into the smoke sensor and cause unwanted alarms.
• In extremely humid areas. This Alarm should be at least 10 feet (3 meters) from a shower, sauna,
humidifier, vaporizer, dishwasher, laundry room, utility room, or other source of high humidity.
• In direct sunlight.
• In turbulent air, like near ceiling fans or open windows. Blowing air
may prevent CO or smoke from reaching the sensors.
• In areas where temperature is colder than 40˚ F (4.4˚ C) or hotter than 100˚F
(37.8˚ C). These areas include non-airconditioned crawl spaces, unfinished
attics, uninsulated or poorly insulated ceilings, porches, and garages.
• In insect infested areas. Insects can clog the openings to the sensing chamber.
• Less than 12 inches (305 mm) away from fluorescent lights.
Electrical “noise” can interfere with the sensor.
• In “dead air” spaces. See “Avoiding Dead Air Spaces”.
AVOIDING DEAD AIR SPACES
“Dead air” spaces may prevent smoke from reaching the Smoke/CO Alarm. To
avoid dead air spaces, follow installation recommendations below.
On ceilings, install Smoke/CO Alarms as close to the center of the ceiling as possible. If this is
not possible, install the Smoke/CO Alarm at least 4 inches (102 mm) from the wall or corner.
For wall mounting (if allowed by building codes), the top edge of Smoke/
CO Alarms should be placed between 4 inches (102 mm) and 12 inches (305
mm) from the wall/ceiling line, below typical “dead air” spaces.
On a peaked, gabled, or cathedral ceiling, install first Smoke/CO Alarm within 3
feet (0.9 meters) of the peak of the ceiling, measured horizontally. Additional Smoke/
CO Alarms may be required depending on the length, angle, etc. of the ceiling’s slope.
Refer to NFPA 72 for details on requirements for sloped or peaked ceilings.
WEEKLY TESTING
• NEVER use an open flame of any kind to test this unit. You might accidentally damage
or set fire to the unit or to your home. The built-in test switch accurately tests the
unit’s operation as required by Underwriters Laboratories, Inc. (UL). NEVER use
vehicle exhaust! Exhaust may cause permanent damage and voids your warranty.
• DO NOT stand close to the Alarm when the horn is sounding. Exposure at close range
may be harmful to your hearing. When testing, step away when horn starts sounding.
It is important to test this unit every week to make sure it is working properly.
Using the test button is the recommended way to test this Smoke/CO Alarm.
You can test this Smoke/CO Alarm: Press and hold the Test/
Silence button 3-5 seconds until unit starts to alarm.
During testing, you will see and hear the following sequence:
• The Horn will sound 3 beeps, pause, 3 beeps. The Power/
Smoke LED flashes Red and the CO LED will be Off.
• Next the Horn will sound 4 beeps, pause, 4 beeps. The Power/
Smoke LED will be Off and the CO LED flashes Red.
If the unit does not alarm, make sure the batteries are correctly installed,
and test again. If the unit still does not alarm, replace it immediately.
HOW TO INSTALL THIS ALARM
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This combination Smoke/CO Alarm was designed to be mounted on the ceiling
or wall. It is not a tabletop device. You must install this device on the ceiling or
wall as outlined below. Read “Where To Install This Alarm” before starting.
Tools you will need: pencil, drill with 3/16” or 5mm drill bit, flathead screwdriver, hammer.
PARTS OF THIS SMOKE/CO ALARM
1. Test/Silence Button
2. Battery Compartment
3. Power/Smoke Alarm LED
4. CO Alarm LED
• Do not connect this unit to any other alarm or auxiliary device. It is a
single-station unit that cannot be linked to other devices. Connecting
anything else to this unit may prevent it from working properly.
• Do not install this unit over an electrical junction box. Air currents around junction
boxes can prevent smoke from reaching the sensing chamber and prevent the unit from
alarming. Only AC powered units are intended for installation over junction boxes.
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If you want to lock the battery compartment, or lock the Smoke/CO Alarm to the mounting
bracket, please read the “Optional Locking Features” section located at www.firstalert.com.
1. Hold base firmly and twist the mounting bracket
counterclockwise (left) to separate it from the unit.
2. Hold the mounting bracket against the ceiling (or wall) so the vertical
mounting slot is aligned in the 12 o’clock position and trace around the
inside of the mounting slots (vertical and horizontal mounting).
3. Put the unit where it won’t get covered with dust when you drill the mounting holes.
4. Using a 3/16” (5 mm) drill bit, drill a hole through the center of the oval outlines you traced.
5. Insert the plastic screw anchors (in the plastic bag with screws) into the holes. Tap the screw
anchors gently with a hammer, if necessary, until they are flush with the ceiling or wall.
6. Line the mounting bracket up over the plastic screw anchors.
7. Screw the mounting bracket to the ceiling or wall through the
mounting slots using the two screws provided.
8. Before attaching the Alarm to the
bracket, insert the two (2) AA batteries
(included) into the battery compartment.
Match the terminals on the end of the
battery with the terminals on the unit.
Match “+” to “+” and “-” to “-.” If the
batteries are not fully inserted, the
unit cannot receive battery power.
NOTE: The unit may beep briefly
when you install the batteries. This
is normal. The GREEN Light flashes
about every 60 seconds when the
unit is receiving battery power.
The battery door will resist closing unless batteries are installed.
This warns you the unit will not operate without batteries.
9. Attach the Smoke/CO Alarm to the mounting
bracket. Line up the guides on the alarm’s
base with the guides on the mounting bracket.
When guides are lined up, turn the base
clockwise (right) until it snaps into place.
NOTE: Once the Smoke/CO Alarm is snapped
onto the mounting bracket, you can rotate the
Smoke/CO Alarm to adjust the alignment.
10. Test the Smoke/CO Alarm. See
“Weekly Testing” for details.
OTHER Z-WAVE SYSTEMS
This product can be operated in any Z-Wave network with other Z-Wave certified devices
from other manufacturers. All non-battery operated nodes within the network will act
as repeaters regardless of the vendor to increase the reliability of the network.
ADD
1. Slide battery door open.
2. Insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
REMOVE
1. Slide battery door open.
2. Remove and re-insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
• The alarm will remain awake for 30 seconds on inclusion.
RESET DEVICE
If the device is powered up with the test button held down for 10+ seconds, the device will reset all
Z-Wave settings and leave the network.
Upon completion of the Reset operation, the LED will glow and the horn will sound for ~1 second.
Please use this procedure only when the network primary controller is missing or
otherwise inoperable.
NOTE: The device will not remain awake after resetting and will go into standby mode.
PROCEDURE TO MANUALLY WAKE-UP THE DEVICE
To manual wake-up the device, slide the battery door open wait for ~5 seconds and then slide
the battery drawer closed. Upon power-up, the device will send the wake-up notification.
DSK LOCATION ON THE PRODUCT
The QR code and the 5-digit DSK pin can be found on the product nameplate which is located on
the back of the product. The Full DSK string can be found on the product insert, available inside the
product packaging.
For more information on Z-Wave specifications, visit www.firstalert.com/zwaveinfo.
REGULAR MAINTENANCE
This unit has been designed to be as maintenance-free as possible, but there
are a few simple things you must do to keep it working properly.
• Test it at least once a week.
• Clean the Smoke/CO Alarm at least once a month; gently vacuum the outside of the Smoke/CO
Alarm using your household vacuum’s soft brush attachment. A can of clean compressed air (sold
at computer or office supply stores) may also be used. Follow manufacturer instructions for use.
Test the Smoke/CO Alarm. Never use water, cleaners or solvents since they may damage the unit.
• If the Smoke/CO Alarm becomes contaminated by excessive dirt, dust and/or grime,
and cannot be cleaned to avoid unwanted alarms, replace the unit immediately.
• Relocate the unit if it sounds frequent unwanted alarms. See
“Where This Alarm Should Not Be Installed” for details.
Choosing a replacement battery:
Your Smoke/CO Alarm requires two standard AA batteries. The following batteries are acceptable as
replacements: Energizer E91, Duracell MN1500/LR6. These batteries are available at many local
retail stores.
• Always use the exact batteries specified by this User’s Manual. DO NOT use
rechargeable batteries. Clean the battery contacts and also those of the device prior
to battery installation. Install batteries correctly with regard to polarity (+ and -).
• Please dispose of or recycle used batteries properly, following any local
regulations. Consult your local waste management authority or recycling
organization to find an electronics recycling facility in your area. DO NOT
DISPOSE OF BATTERIES IN FIRE. BATTERIES MAY EXPLODE OR LEAK.
• Constant exposure to high or low temperatures or high humidity may reduce battery life.
• Keep battery out of reach of children. In the event a battery is swallowed,
immediately contact your poison control center, your physician, or the National
Battery Ingestion hotline at 202-625-3333 as serious injury may occur.
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Actual battery service life depends on the Smoke/CO Alarm and the environment in which
it is installed. All the batteries specified above are acceptable replacement batteries for
this unit. Regardless of the manufacturer’s suggested battery life, you MUST replace
the battery immediately once the unit starts “chirping” (the “low battery warning”).
To replace the batteries (without removing
Alarm from the ceiling or wall):
1. Open the battery compartment.
2. Press tabs A and B as shown in the
diagram and remove each battery.
3. Insert the new batteries, making sure they
snap completely into the battery compartment.
Match the terminals on the ends of the
batteries with the terminals on the unit.
4. Close the battery compartment, and then test
the unit by pressing the Test/Silence button.
AB
IF YOUR SMOKE/CO ALARM SOUNDS
WHAT TO DO FIRST–IDENTIFY THE TYPE OF ALARM
Type of Alarm What You See and Hear
Carbon Monoxide (CO)
CO LED: Flashes Red
Horn: 4 beeps, pause, 4 beeps, pause
Power/Smoke LED: Off
Smoke
Power/Smoke LED: Flashes Red
Horn: 3 beeps, pause, 3 beeps, pause
CO LED: Off
IF THE CO ALARM SOUNDS
“ALARM-MOVE TO FRESH AIR”
If you hear the CO alarm horn and the CO red light is flashing, move
everyone to a source of fresh air. DO NOT remove the batteries!
Actuation of your CO Alarm indicates the presence of carbon monoxide (CO) which
can kill you. In other words, when your CO Alarm sounds, you must not ignore it!
IF THE CO ALARM SIGNAL SOUNDS:
1. Operate the Test/Silence button.
2. Call your emergency services, fire department or 911. Write down
the number of your local emergency service here:
__________________________________________________________________
3. Immediately move to fresh air—outdoors or by an open door or window. Do a head count
to check that all persons are accounted for. Do not re-enter the premises, or move away
from the open door or window until the emergency services responder has arrived, the
premises have been aired out, and your CO Alarm remains in its normal condition.
4. After following steps 1-3, if your CO Alarm reactivates within a 24-hour period, repeat steps
1-3 and call a qualified appliance technician to investigate for sources of CO from fuel-burning
equipment and appliances, and inspect for proper operation of this equipment. If problems are
identified during this inspection have the equipment serviced immediately. Note any combustion
equipment not inspected by the technician, and consult the manufacturers’ instructions, or
contact the manufacturers directly, for more information about CO safety and this equipment.
Make sure that motor vehicles are not, and have not, been operating in an attached garage or
adjacent to the residence. Write down the number of a qualified appliance technician here:
__________________________________________________________________
NOTE: A qualified appliance technician is defined as “a person, firm, corporation, or company that
either in person or through a representative, is engaged in and responsible for the installation, testing,
servicing, or replacement of heating, ventilation, air conditioning (HVAC) equipment, combustion
appliances and equipment, and/or gas fireplaces or other decorative combustion equipment.”
IF THE SMOKE ALARM SOUNDS
RESPONDING TO AN ALARM
• If the unit alarms and you are not testing the unit, it is warning you of a
potentially dangerous situation that requires your immediate attention. NEVER
ignore any alarm. Ignoring the alarm may result in injury or death.
• Never remove the batteries from a battery operated Smoke/CO Alarm to stop an
unwanted alarm (caused by cooking smoke, etc.). Removing batteries disables
the alarm so it cannot sense smoke, and removes your protection. Instead open a
window or fan the smoke away from the unit. The alarm will reset automatically.
• If the unit alarms get everyone out of the house immediately.
WHAT TO DO IN CASE OF FIRE
Don’t panic; stay calm. Follow your family escape plan.
Get out of the house as quickly as possible. Don’t stop to get dressed or collect anything.
Feel doors with the back of your hand before opening them. If a door is cool, open it slowly.
Don’t open a hot door. Keep doors and windows closed, unless you must escape through them.
Cover your nose and mouth with a cloth (preferably damp). Take short, shallow breaths.
Meet at your planned meeting place outside your home, and do a
head count to make sure everybody got out safely.
Call the Fire Department as soon as possible from outside. Give your address, then your name.
Never go back inside a burning building for any reason.
Contact your Fire Department for ideas on making your home safer.
Alarms have various limitations. See “General Limitations of Smoke/CO Alarms” for details.
USING THE SILENCE FEATURES
Never remove the batteries to quiet an unwanted alarm. Removing the
batteries disables the alarm and removes your protection.
The Silence Feature is intended to temporarily silence the horn while you
identify and correct the problem. Do not use the Silence Feature in emergency
situations. It will not correct a CO problem or extinguish a fire.
The Silence Feature can temporarily quiet an unwanted alarm for several minutes.
Press the Test/Silence button on the alarm cover for at least 3-5 seconds.
After the Test/Silence button is released, the Red LED blinks during the silence mode.
When the Smoke Alarm is Silenced When the CO Alarm is Silenced
The Smoke Alarm will remain silent for up to
15 minutes, then return to normal operation.
If the smoke has not cleared–or continues to
increase–the device will go back into alarm.
The CO alarm will remain silent
for up to 4 minutes.
After 4 minutes, if CO levels remain potentially
dangerous the horn will start sounding again.
SILENCING THE LOW BATTERY WARNING
This silence feature can temporarily quiet the low battery warning “chirp” for
up to 8 hours. Press the Test/Silence button on the alarm cover.
Once the low battery warning “chirp” silence feature is activated, the unit continues to flash the
Green light once a minute for 8 hours. After 8 hours, the low battery “chirp” will resume. Replace
the batteries as soon as possible; this unit will not operate without battery power!
To deactivate this feature: Press the Test/Silence button again. The unit will go into Test Mode
and the low battery warning will resume (LED flashes and unit sounds “chirp” once a minute).
SILENCING THE END OF LIFE SIGNAL
This silence feature can temporarily quiet the End of Life warning “chirp” for up to 2 days.
You can silence the End of Life warning “chirp” by pressing the Test/Silence button. The
horn will chirp, acknowledging that the End of Life silence feature has been activated.
After approximately 2 days, the End of Life “chirp” will resume.
WHAT YOU NEED TO KNOW ABOUT CO
WHAT IS CO?
CO is an invisible, odorless, tasteless gas produced when fossil fuels do not burn completely,
or are exposed to heat (usually fire). Electrical appliances typically do not produce CO.
These fuels include: Wood, coal, charcoal, oil, natural gas, gasoline, kerosene, and propane.
Common appliances are often sources of CO. If they are not properly maintained,
are improperly ventilated, or malfunction, CO levels can rise quickly. CO is a real
danger now that homes are more energy efficient. “Air-tight” homes with added
insulation, sealed windows, and other weatherproofing can “trap” CO inside.
SYMPTOMS OF CO POISONING
These symptoms are related to CO POISONING and should
be discussed with ALL household members.
Mild Exposure: Slight headache, nausea, vomiting, fatigue (“flu-like” symptoms).
Medium Exposure: Throbbing headache, drowsiness, confusion, fast heart rate.
Extreme Exposure: Convulsions, unconsciousness, heart and lung failure.
Exposure to Carbon Monoxide can cause brain damage, death.
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This CO Alarm measures exposure to CO over time. It alarms if CO levels are extremely
high in a short period of time, or if CO levels reach a certain minimum over a long period of
time. The CO Alarm generally sounds an alarm before the onset of symptoms in average,
healthy adults. Why is this important? Because you need to be warned of a potential CO
problem while you can still react in time. In many reported cases of CO exposure, victims
may be aware that they are not feeling well, but become disoriented and can no longer
react well enough to exit the building or get help. Also, young children and pets may be the
first affected. The average healthy adult might not feel any symptoms when the CO Alarm
sounds. However, people with cardiac or respiratory problems, infants, unborn babies,
pregnant mothers, or elderly people can be more quickly and severely affected by CO. If
you experience even mild symptoms of CO poisoning, consult your doctor immediately!
FINDING THE SOURCE OF CO AFTER AN ALARM
Carbon monoxide is an odorless, invisible gas, which often makes it difficult to locate the source of
CO after an alarm. These are a few of the factors that can make it difficult to locate sources of CO:
• House well ventilated before the investigator arrives.
• Problem caused by “backdrafting.”
• Transient CO problem caused by special circumstances.
Because CO may dissipate by the time an investigator arrives, it may be
difficult to locate the source of CO. BRK Brands, Inc. shall not be obligated
to pay for any carbon monoxide investigation or service call.
POTENTIAL SOURCES OF CO IN THE HOME
Fuel-burning appliances like: portable
heater, gas or wood burning fireplace, gas
kitchen range or cooktop, gas clothes dryer.
Damaged or insufficient venting:
corroded or disconnected water heater
vent pipe, leaking chimney pipe or flue,
or cracked heat exchanger, blocked
or clogged chimney opening.
Improper use of appliance/
device: operating a barbecue grill
or vehicle in an enclosed area (like
a garage or screened porch).
Transient CO Problems: “transient”
or on-again-off-again CO problems
can be caused by outdoor conditions
and other special circumstances.
The following conditions can result in transient CO situations:
1. Excessive spillage or reverse venting of fuel appliances caused by outdoor conditions such as:
• Wind direction and/or velocity, including high, gusty winds. Heavy air in the
vent pipes (cold/humid air with extended periods between cycles).
• Negative pressure differential resulting from the use of exhaust fans.
• Several appliances running at the same time competing for limited fresh air.
• Vent pipe connections vibrating loose from clothes dryers, furnaces, or water heaters.
• Obstructions in or unconventional vent pipe designs which can amplify the above situations.
2. Extended operation of unvented fuel burning devices (range, oven, fireplace).
3. Temperature inversions, which can trap exhaust close to the ground.
4. Car idling in an open or closed attached garage, or near a home.
These conditions are dangerous because they can trap exhaust in your home. Since these
conditions can come and go, they are also hard to recreate during a CO investigation.
HOW CAN I PROTECT MY FAMILY
FROM CO POISONING?
A CO Alarm is an excellent means of protection. It monitors the air and sounds a loud
alarm before Carbon Monoxide levels become threatening for average, healthy adults.
A CO Alarm is not a substitute for proper maintenance of home appliances.
To help prevent CO problems and reduce the risk of CO poisoning:
• Clean chimneys and flues yearly. Keep them free of debris, leaves, and nests for
proper air flow. Also, have a professional check for rust and corrosion, cracks,
or separations. These conditions can prevent proper air movement and cause
backdrafting. Never “cap” or cover a chimney in any way that would block air flow.
• Test and maintain all fuel-burning equipment annually. Many local gas or oil
companies and HVAC companies offer appliance inspections for a nominal fee.
• Make regular visual inspections of all fuel-burning appliances. Check appliances for
excessive rust and scaling. Also check the flame on the burner and pilot lights. The
flame should be blue. A yellow flame means fuel is not being burned completely and CO
may be present. Keep the blower door on the furnace closed. Use vents or fans when
they are available on all fuel-burning appliances. Make sure appliances are vented to
the outside. Do not grill or barbecue indoors, or in garages or on screen porches.
• Check for exhaust backflow from CO sources. Check the draft hood on an operating
furnace for a backdraft. Look for cracks on furnace heat exchangers.
• Check the house or garage on the other side of shared wall.
• Keep windows and doors open slightly. If you suspect that CO is escaping into your home,
open a window or a door. Opening windows and doors can significantly decrease CO levels.
In addition, familiarize yourself with all enclosed materials. Read this manual in its
entirety, and make sure you understand what to do if your CO Alarm sounds.
REGULATORY INFORMATION FOR SMOKE/CO ALARMS
REGULATORY INFORMATION FOR CO ALARMS
WHAT LEVELS OF CO CAUSE AN ALARM?
Underwriters Laboratories Inc. Standard UL2034 requires residential CO Alarms
to sound when exposed to levels of CO and exposure times as described below.
They are measured in parts per million (ppm) of CO over time (in minutes).
UL2034 Required Alarm Points*:
• If the alarm is exposed to 400 ppm of CO, IT MUST ALARM BETWEEN 4 and 15 MINUTES.
• If the alarm is exposed to 150 ppm of CO, IT MUST ALARM BETWEEN 10 and 50 MINUTES.
• If the alarm is exposed to 70 ppm if CO, IT MUST ALARM BETWEEN 60 and 240 MINUTES.
*Approximately 10% COHb exposure at levels of 10% to 95% Relative Humidity (RH).
The unit is designed not to alarm when exposed to a constant level of 30 ppm for 30 days.
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CO Alarms are designed to alarm before there is an immediate life threat.
Since you cannot see or smell CO, never assume it’s not present.
• An exposure to 100 ppm of CO for 20 minutes may not affect average, healthy
adults, but after 4 hours the same level may cause headaches.
• An exposure to 400 ppm of CO may cause headaches in average, healthy
adults after 35 minutes, but can cause death after 2 hours.
Standards: Underwriters Laboratories Inc. Single and Multiple
Station carbon monoxide alarms UL2034.
According to Underwriters Laboratories Inc. UL2034, Section 1-1.2: “Carbon monoxide alarms
covered by these requirements are intended to respond to the presence of carbon monoxide from
sources such as, but not limited to, exhaust from internal-combustion engines, abnormal operation
of fuel-fired appliances, and fireplaces. CO Alarms are intended to alarm at carbon monoxide
levels below those that could cause a loss of ability to react to the dangers of Carbon Monoxide
exposure.” This CO Alarm monitors the air at the Alarm, and is designed to alarm before CO levels
become life threatening. This allows you precious time to leave the house and correct the problem.
This is only possible if Alarms are located, installed, and maintained as described in this manual.
Gas Detection at Typical Temperature and Humidity Ranges: The CO Alarm is not formulated
to detect CO levels below 30 ppm typically. UL tested for false alarm resistance to Methane (500
ppm), Butane (300 ppm), Heptane (500 ppm), Ethyl Acetate (200 ppm), Isopropyl Alcohol (200 ppm)
and Carbon Dioxide (5000 ppm). Values measure gas and vapor concentrations in parts per million.
Audible Alarm: 85 dB minimum at 10 feet (3 meters).
Printed in Mexico M08-0456-169793_1044807 K1 02/20
REGULATORY INFORMATION FOR SMOKE ALARMS
RECOMMENDED LOCATIONS FOR SMOKE ALARMS
Installing Smoke Alarms in Single-Family Residences
The National Fire Protection Association (NFPA), recommends one Smoke Alarm on every floor,
in every sleeping area, and in every bedroom. In new construction, the Smoke Alarms must be
AC powered and interconnected. See “Agency Placement Recommendations” for details.
For additional coverage, it is recommended that you install a Smoke Alarm in all
rooms, halls, storage areas, finished attics, and basements, where temperatures
normally remain between 40˚ F (4.4˚ C) and 100˚ F (37.8˚ C). Make sure no door or
other obstruction could keep smoke from reaching the Smoke Alarms.
More specifically, install Smoke Alarms:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet long (12 meters), install a unit at each end.
• At the top of the first-to-second floor stairway, and at the bottom of the basement stairway.
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Specific requirements for Smoke Alarm installation vary from state to state and from region to region.
Check with your local Fire Department for current requirements in your area. It is recommended AC
or AC/DC units be interconnected for added protection.
AGENCY PLACEMENT RECOMMENDATIONS
Standards: Underwriters Laboratories Inc. Single and Multiple Station Smoke Alarms 217.
NFPA 72 Chapter 29
“For your information, the National Fire Alarm and Signaling Code, NFPA 72, reads as follows:”
29.5.1* Required Detection.
29.5.1.1* Where required by other governing laws, codes, or standards for a specific type of
occupancy, approved single and multiple-station smoke alarms shall be installed as follows:
(1) *In all sleeping rooms and guest rooms
(2) *Outside of each separate dwelling unit sleeping area, within 21 ft (6.4 m) of any
door to a sleeping room, with the distance measured along a path of travel
(3) On every level of a dwelling unit, including basements
(4) On every level of a residential board and care occupancy (small facility),
including basements and excluding crawl spaces and unfinished attics
(5) *In the living area(s) of a guest suite
(6) In the living area(s) of a residential board and care occupancy (small facility)
(Reprinted with permission from NFPA 72®, National Fire Alarm and Signaling Code Copyright © 2010
National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the complete
and official position of the National Fire Protection Association, on the referenced subject which is
represented only by the standard in its entirety), (National Fire Alarm and Signaling Code®and NFPA
72®are registered trademarks of the National Fire Protection Association, Inc., Quincy, MA 02269).
California State Fire Marshal (CSFM)
Early warning detection is best achieved by the installation of fire detection equipment
in all rooms and areas of the household as follows: A Smoke Alarm installed in each
separate sleeping area (in the vicinity, but outside bedrooms), and Heat or Smoke Alarms
in the living rooms, dining rooms, bedrooms, kitchens, hallways, finished attics, furnace
rooms, closets, utility and storage rooms, basements, and attached garages.
ABOUT SMOKE ALARMS
Battery (DC) operated Smoke Alarms: Provide protection even when
electricity fails, provided the batteries are fresh and correctly installed. Units
are easy to install, and do not require professional installation.
AC powered Smoke Alarms: Can be interconnected so if one unit senses smoke,
all units alarm. They do not operate if electricity fails. AC with battery (DC) back-
up: will operate if electricity fails, provided the batteries are fresh and correctly
installed. AC and AC/DC units must be installed by a qualified electrician.
Smoke/CO Alarms for Solar or Wind Energy users and battery backup power systems:
AC powered Smoke/CO Alarms should only be operated with true or pure sine wave inverters.
Operating this Alarm with most battery-powered UPS (uninterruptible power supply) products
or square wave or “quasi sine wave” inverters will damage the Alarm. If you are not sure
about your inverter or UPS type, please consult with the manufacturer to verify.
Smoke Alarms for the hearing impaired: Special purpose Smoke Alarms should
be installed for the hearing impaired. They include a visual alarm and an audible
alarm horn, and meet the requirements of the Americans With Disabilities Act.
Can be interconnected so if one unit senses smoke, all units alarm.
ABOUT SMOKE ALARMS (CONTINUED)...
Smoke alarms are not to be used with detector guards unless the
combination has been evaluated and found suitable for that purpose.
All these Smoke Alarms are designed to provide early warning of fires if located, installed and
cared for as described in the user’s manual, and if smoke reaches the Alarm. If you are unsure
which type of Smoke Alarm to install, refer the National Fire Protection Association (NFPA)
Standard 72 (National Fire Alarm and Signaling Code) and NFPA 101 (Life Safety Code). National
Fire Protection Association, One Batterymarch Park, Quincy, MA 02269-9101. Local building
codes may also require specific units in new construction or in different areas of the home.
SPECIAL COMPLIANCE CONSIDERATIONS
This Smoke Alarm is suitable for use in apartments, condominiums, townhouses, hospitals, day
care facilities, health care facilities, boarding houses, group homes and dormitories provided
a primary fire detection system already exists to meet fire detection requirements in common
areas like lobbies, hallways, or porches. Using this Smoke Alarm in common areas may not
provide sufficient warning to all residents or meet local fire protection ordinances/regulations.
This Smoke Alarm alone is not a suitable substitute for complete fire detection systems
in places housing many people—like apartment buildings, condominiums, hotels, motels,
dormitories, hospitals, health care facilities, nursing homes, day care facilities, or group homes
of any kind. It is not a suitable substitute for complete fire detection systems in warehouses,
industrial facilities, commercial buildings, and special-purpose non-residential buildings which
require special fire detection and alarm systems. Depending on the building codes in your
area, this Smoke Alarm may be used to provide additional protection in these facilities.
In new construction, most building codes require the use of AC or AC/DC powered Smoke
Alarms only. In existing construction, AC, AC/DC, or DC powered Smoke Alarms can be used
as specified by local building codes. Refer to NFPA 72 (National Fire Alarm and Signaling
Code) and NFPA 101 (Life Safety Code), local building codes, or consult your Fire Department
for detailed fire protection requirements in buildings not defined as “households”.
HUD MAP PROGRAM
Certain HUD battery powered Smoke Alarm applications, especially those that fall under
HUD 223(f) MAP (Multi-family Accelerated Processing), may require a 10 Year sealed tamper
resistant battery. This alarm does not meet that requirement. Substitute First Alert SA340B.
GENERAL LIMITATIONS OF SMOKE/CO ALARMS
This Smoke/CO Alarm is intended for residential use. It is not intended for use in industrial
applications where Occupational Safety and Health Administration (OSHA) requirements for
Carbon Monoxide Alarms must be met. The Smoke Alarm portion of this device is not intended
to alert hearing impaired residents. Special purpose Smoke Alarms should be installed for
hearing impaired residents (CO Alarms are not yet available for the hearing impaired).
Smoke/CO Alarms may not waken all individuals. Practice the escape plan at least twice a year,
making sure that everyone is involved – from kids to grand- parents. Allow children to master fire
escape planning and practice before holding a fire drill at night when they are sleeping. If children
or others do not readily waken to the sound of the Smoke/CO Alarm, or if there are infants or
family members with mobility limitations, make sure that someone is assigned to assist them in
fire drill and in the event of an emergency. It is recommended that you hold a fire drill while family
members are sleeping in order to determine their response to the sound of the Smoke/CO Alarm
while sleeping and to determine whether they may need assistance in the event of an emergency.
Smoke/CO Alarms cannot work without power. Battery operated units cannot work if the batteries
are missing, disconnected or dead, if the wrong type of batteries are used, or if the batteries are not
installed correctly. AC units cannot work if the AC power is cut off for any reason (open fuse or circuit
breaker, failure along a power line or at a power station, electrical fire that burns the electrical wires,
etc.). If you are concerned about the limitations of battery or AC power, install both types of units.
This Smoke/CO Alarm will not sense smoke or CO that does not reach the sensors. It will
only sense smoke or CO at the sensor. Smoke or CO may be present in other areas. Doors or other
obstructions may affect the rate at which CO or smoke reaches the sensors. If bedroom doors are
usually closed at night, we recommend you install an alarm device (Combination CO and Smoke
Alarm, or separate CO Alarms and Smoke Alarms) in each bedroom and in the hallway between them.
This Smoke/CO Alarm may not sense smoke or CO on another level of the home. Example:
This alarm device, installed on the second floor, may not sense smoke or CO in the basement.
For this reason, one alarm device may not give adequate early warning. Recommended minimum
protection is one alarm device in every sleeping area, every bedroom, and on every level of your
home. Some experts recommend battery powered Smoke and CO Alarms be used in conjunction
with interconnected AC powered Smoke Alarms. For details, see “About Smoke Alarms” for details.
Smoke/CO Alarms may not be heard. The alarm horn loudness meets or exceeds current
UL standards of 85 dB at 10 feet (3 meters). However, if the Smoke/CO Alarm is installed
outside the bedroom, it may not wake up a sound sleeper or one who has recently used
drugs or has been drinking alcoholic beverages. This is especially true if the door is closed
or only partly open. Even persons who are awake may not hear the alarm horn if the sound
is blocked by distance or closed doors. Noise from traffic, stereo, radio, television, air
conditioner, or other appliances may also prevent alert persons from hearing the alarm
horn. This Smoke/CO Alarm is not intended for people who are hearing impaired.
The Alarm may not have time to alarm before the fire itself causes damage,
injury, or death, since smoke from some fires may not reach the unit
immediately. Examples of this include persons smoking in bed, children playing with
matches, or fires caused by violent explosions resulting from escaping gas.
This Smoke/CO Alarm is not a substitute for life insurance. Though this Smoke/CO Alarm
warns against increasing CO levels or the presence of smoke, BRK Brands, Inc. does not warrant or
imply in any way that they will protect lives. Homeowners and renters must still insure their lives.
This Smoke/CO Alarm has a limited life. Although this Smoke/CO Alarm and all
of its parts have passed many stringent tests and are designed to be as reliable as
possible, any of these parts could fail at any time. Therefore, you must test this device
weekly. The unit should be replaced immediately if it is not operating properly.
This Smoke/CO Alarm is not foolproof. Like all other electronic devices, this Smoke/CO Alarm
has limitations. It can only detect smoke or CO that reaches the sensors. It may not give early
warning of the source of smoke or CO is in a remote part of the home, away from the alarm device.
Z-Wave Mesh Network Limitations 1. Alarms are single stationed Alarms and are
not interconnected to each other. 2. Only initiating Alarms will sound. 3. Z-Wave
system is not listed as a life safety system. Mesh network system only provides
supplemental notifications and should not be counted on for life safety.
TROUBLESHOOTING GUIDE
IF THE ALARM... PROBLEM... YOU SHOULD...
Horn “chirps” and LED flashes GREEN about once per minute. Low battery warning. Install two new AA batteries*.
Horn “chirps” 3 times every minute; LED
flashes GREEN 3 rapid flashes.
MALFUNCTION SIGNAL. Device is not working
properly, and needs to be replaced.
Units under warranty should be returned to manufacturer
for replacement. See “Limited Warranty” for details.
Horn “chirps” 5 times every minute; LED
flashes GREEN 5 rapid flashes. END OF LIFE SIGNAL. Alarm needs to be replaced. Immediately replace the Alarm.
Carbon Monoxide Alarm ONLY:
CO Alarm goes back into alarm 4 minutes after you Silence it. CO levels indicate a potentially dangerous situation.
IF YOU ARE FEELING SYMPTOMS OF CO POISONING,
EVACUATE your home and call 911 or the Fire Department.
Refer to “If The CO Alarm Sounds” for details.
CO Alarm sounds frequently even though no high
levels of CO are revealed in an investigation.
The CO Alarm may be improperly located. Refer
to “Where to Install This Alarm” for details.
Relocate your Alarm. If frequent alarms continue, have
home rechecked for potential CO problems. You may
be experiencing an intermittent CO problem.
Smoke Alarm ONLY:
Smoke Alarm sounds when no smoke is visible. Unwanted alarm may be caused by non-
emergency source like cooking smoke.
Silence Alarm using manual button; clean the Alarm’s
cover with a soft, clean cloth. If frequent unwanted alarms
continue, relocate your Alarm. Alarm may be too close to
a kitchen, cooking appliance, or steamy bathroom.
*For a list of acceptable replacement batteries, see “Regular Maintenance.”
If you have any questions that cannot be answered by reading this manual, call the Customer Service Team: 1-800-323-9005.
LIMITED WARRANTY
BRK Brands, Inc., (“BRK”) the maker of First Alert®brand and BRK®brand products, warrants that for a period of ten years from the date of purchase, this product will be free from defects in
material and workmanship. BRK, at its option, will repair or replace this product or any component of the product found to be defective during the warranty period. Replacement will be made with a
new or remanufactured product or component. If the product is no longer available, replacement may be made with a similar product of equal or greater value. This is your exclusive warranty.
This warranty is valid for the original retail purchaser from the date of initial retail purchase and is not transferable. Keep the original sales receipt. Proof of purchase is required to obtain warranty
performance. BRK dealers, service centers, or retail stores selling BRK products do not have the right to alter, modify or any way change the terms and conditions of this warranty.
This warranty does not cover normal wear of parts or damage resulting from any of the following: negligent use or misuse of the product, use on improper
voltage or current, use contrary to the operating instructions, disassembly, repair or alteration by anyone other than BRK or an authorized service center. Further,
the warranty does not cover Acts of God, such as fire, flood, hurricanes and tornadoes or any batteries that are included with this unit.
BRK shall not be liable for any incidental or consequential damages caused by the breach of any express or implied warranty. Except to the extent prohibited by applicable law,
any implied warranty of merchantability or fitness for a particular purpose is limited in duration to the duration of the above warranty. Some states, provinces or jurisdictions
do not allow the exclusion or limitation of incidental or consequential damages or limitations on how long an implied warranty lasts, so the above limitations or exclusion
may not apply to you. This warranty gives you specific legal rights, and you may also have other rights that vary from state to state or province to province.
How to Obtain Warranty Service
Service: If service is required, do not return the product to your retailer. In order to obtain warranty service, contact the Customer Service Team at
1-800-323-9005. To assist us in serving you, please have the model number and date of purchase available when calling.
For Warranty Service return to: 1301 Joe Battle, El Paso, TX 79936
Battery: BRK Brands, Inc. make no warranty, express or implied, written or oral, including that of merchantability or fitness for any particular purpose with respect to battery.
Visit www.firstalert.com for more information.
For your records, please record:
Date Purchased: ______________/_________________Month/Year
Where Purchased: ____________________________________________
Date Installed: ____________/____________Month/Year
Replace alarm 7 years after installation. Please write the date in the
space provided: __________/__________ Month/Year
The alarm will also provide an audible End-of-Life Signal approximately
7 years after installation to remind you to replace the unit.
The End-of-Life Signal can be silenced for up to 2 days. Do not unplug
the alarm or remove the batteries until you get replacement.
A copy of the manual can be found at www.firstalert.com/products.

123456
USER’S MANUAL
COMBINATION CARBON
MONOXIDE & SMOKE ALARM
IMPORTANT! PLEASE READ CAREFULLY AND SAVE.
This user’s manual contains important information about your Combination Carbon
Monoxide & Smoke Alarm’s operation. If you are installing this Alarm for use by
others, you must leave this manual— or a copy of it—with the end user.
Separate sensors to detect smoke and CO;
the two alarm systems work independently
Powered by two “AA” batteries
Side access drawer for easy battery replacement
Printed in Mexico
M08-0456-169793_1044807 K1 02/20
CONFORMS TO
UL STD 217 AND UL STD 2034 Model ZCOMBO
Sku 1044807
© 2020 BRK Brands, Inc. All rights reserved. •Distributed by BRK Brands, Inc.
Aurora, IL 60504 •BRK Brands, Inc. is a subsidiary of Newell Brands Inc. (NASDAQ: NWL)
Customer Service Team: [phone] •www.firstalert.com •www.brkelectronics.com
All First Alert®and BRK®Smoke Alarms conform to regulatory requirements,
including UL217 and are designed to detect particles of combustion. Smoke
particles of varying number and size are produced in all fires.
Ionization technology is generally more sensitive than photoelectric technology at
detecting small particles, which tend to be produced in greater amounts by flaming
fires, which consume combustible materials rapidly and spread quickly. Sources of
these fires may include paper burning in a wastebasket, or a grease fire in the kitchen.
Photoelectric technology is generally more sensitive than ionization technology
at detecting large particles, which tend to be produced in greater amounts
by smoldering fires, which may smolder for hours before bursting into flame.
Sources of these fires may include cigarettes burning in couches or bedding.
For maximum protection, use both types of Smoke Alarms on
each level and in every bedroom of your home.
INTRODUCTION
FIRE SAFETY TIPS
Follow safety rules and prevent hazardous situations: 1) Use smoking materials properly. Never
smoke in bed. 2) Keep matches or lighters away from children; 3) Store flammable materials in
proper containers; 4) Keep electrical appliances in good condition and don’t overload electrical
circuits; 5) Keep stoves, barbecue grills, fireplaces and chimneys grease- and debris-free; 6)
Never leave anything cooking on the stove unattended; 7) Keep portable heaters and open
flames, like candles, away from flammable materials; 8) Don’t let rubbish accumulate.
Keep alarms clean, and test them weekly. Replace alarms immediately if they are not working
properly. Smoke Alarms that do not work cannot alert you to a fire. Keep at least one working
fire extinguisher on every floor, and an additional one in the kitchen. Have fire escape ladders
or other reliable means of escape from an upper floor in case stairs are blocked.
BASIC SAFETY INFORMATION
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• Dangers, Warnings, and Cautions alert you to important operating instructions
or to potentially hazardous situations. Pay special attention to these items.
• This Smoke/CO Alarm is approved for use in single-family
residences. It is NOT designed for marine or RV use.
• This combination Smoke/Carbon Monoxide Alarm has two separate alarms. The CO
Alarm is not designed to detect fire or any other gas. It will only indicate the presence
of carbon monoxide gas at the sensor. Carbon monoxide gas may be present in
other areas. The Smoke Alarm will only indicate the presence of smoke that reaches
the sensor. The Smoke Alarm is not designed to sense gas, heat or flames.
• This Smoke/CO Alarm cannot operate without working batteries.
Removing the batteries for any reason, or failing to replace the batteries
at the end of their service life, removes your protection.
• NEVER ignore any alarm. See “If Your Smoke/CO Alarm Sounds” for more information
on how to respond to an alarm. Failure to respond can result in injury or death.
• The Silence Features are for your convenience only and will not correct a problem.
See “Using the Silence Features” for details. Always check your home for a
potential problem after any alarm. Failure to do so can result in injury or death.
• Test this Smoke/CO Alarm once a week. If the Alarm ever fails to test correctly, have it
replaced immediately! If the Alarm is not working properly, it cannot alert you to a problem.
• This product is intended for use in ordinary indoor locations of family living units.
It is not designed to measure CO levels in compliance with Occupational Safety
and Health Administration (OSHA) commercial or industrial standards. Individuals
with medical conditions that may make them more sensitive to carbon monoxide
may consider using warning devices which provide audible and visual signals
for carbon monoxide concentrations under 30 ppm. For additional information
on carbon monoxide and your medical condition contact your physician.
FCC COMPLIANCE
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that the interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that of the receiver.
• Consult the dealer or an experienced radio or TV technician for help.
Changes or modifications to the product, not expressly approved by First Alert /
BRK Brands, Inc., could void the user’s authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
INSTALLATION
WHERE TO INSTALL THIS ALARM
Minimum coverage for Smoke Alarms, as recommended by the National Fire Protection
Association (NFPA), is one Smoke Alarm on every floor, in every sleeping area, and in every bedroom
(See “Regulatory Information For Smoke Alarms” for details on the NFPA recommendations).
For CO Alarms, the National Fire Protection Association (NFPA) recommends that
a CO Alarm should be centrally located outside of each separate sleeping area in
the immediate vicinity of the bedrooms. For added protection, install additional
CO Alarms in each separate bedroom, and on every level of your home.
NOTE: For added protection, install an additional Smoke/CO Alarm at least 15 feet (4.6 meters)
away from the furnace or fuel burning heat source where possible. In smaller homes or in
manufactured homes where this distance cannot be maintained, install the Alarm as far away as
possible from the furnace or other fuel burning source. Installing the Alarm closer than 15 feet
(4.6 meters) will not harm the Alarm, but may increase the frequency of unwanted alarms.
To pair this ZCOMBO alarm to a Ring or other compatible Z-Wave network, download the
appropriate App and follow the instructions to Set up Device or Connect Device.
IN GENERAL, INSTALL COMBINATION SMOKE AND CARBON MONOXIDE ALARMS:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet (12 meters) long, install a unit at each end.
• At the top of first-to-second floor stairs.
• At the bottom of the basement stairs.
• For additional coverage, install Alarms in all rooms, halls, and storage areas, where
temperatures normally remain between 40˚ F and 100˚ F (4.4˚ C and 37.8˚ C).
RECOMMENDED PLACEMENT
SUGGESTED AREAS FOR INSTALLING 
SMOKE ALARMS, CO ALARMS, AND COMBO UNITS
SMOKE ALARM WITH 
SILENCE FEATURE
CO ALARMS
BOTH, OR COMBINATION 
SMOKE/CO ALARMS
SMOKE ALARMS
KEY:
Suggested locations are based on
NFPA recommendations (NFPA 72 
for Smoke Alarms and NFPA 720 for
Carbon Monoxide Alarms). Always 
refer to national and local codes 
before beginning any installation.
In new construction AC and AC/DC smoke alarms MUST
be interconnected to meet NFPA recommendations.

• When installing on the wall, the top edge of Smoke Alarms should be placed
between 4 inches (102 mm) and 12 inches (305 mm) from the wall/ceiling line.
• When installing on the ceiling, place the alarm as close to the center as possible.
• In either case, install at least 4 inches (102 mm) from where the wall and
ceiling meet. See “Avoiding Dead Air Spaces” for more information.
NOTE: For any location, make sure no door or other obstruction could
keep carbon monoxide or smoke from reaching the Alarm.
Installing Smoke/CO Alarms in Mobile Homes
For minimum security install one Smoke/CO Alarm as close to each sleeping area as possible.
For more security, put one unit in each room. Many older mobile homes (especially those built
before 1978) have little or no insulation. If your mobile home is not well insulated, or if you
are unsure of the amount of insulation, it is important to install units on inside walls only.
WHERE THIS ALARM SHOULD NOT BE INSTALLED
DO NOT LOCATE THIS SMOKE/CO ALARM:
• In garages, furnace rooms, crawl spaces and unfinished attics.
Avoid extremely dusty, dirty or greasy areas.
WHERE THIS ALARM SHOULD NOT BE INSTALLED - DO NOT
LOCATE THIS SMOKE/CO ALARM (CONTINUED)...
• Where combustion particles are produced. Combustion particles form when something burns.
Areas to avoid include poorly ventilated kitchens, garages, and furnace rooms. Keep units at
least 20 feet (6 meters) from the sources of combustion particles (stove, furnace, water heater,
space heater) if possible. In areas where a 20-foot (6 meter) distance is not possible – in
modular, mobile, or smaller homes, for example – it is recommended the Smoke Alarm be
placed as far from these fuel-burning sources as possible. The placement recommendations
are intended to keep these Alarms at a reasonable distance from a fuel-burning source,
and thus reduce “unwanted” alarms. Unwanted alarms can occur if a Smoke Alarm is
placed directly next to a fuel-burning source. Ventilate these areas as much as possible.
• Within 5 feet (1.5 meters) of any cooking appliance. In air streams near kitchens. Air
currents can draw cooking smoke into the smoke sensor and cause unwanted alarms.
• In extremely humid areas. This Alarm should be at least 10 feet (3 meters) from a shower, sauna,
humidifier, vaporizer, dishwasher, laundry room, utility room, or other source of high humidity.
• In direct sunlight.
• In turbulent air, like near ceiling fans or open windows. Blowing air
may prevent CO or smoke from reaching the sensors.
• In areas where temperature is colder than 40˚ F (4.4˚ C) or hotter than 100˚F
(37.8˚ C). These areas include non-airconditioned crawl spaces, unfinished
attics, uninsulated or poorly insulated ceilings, porches, and garages.
• In insect infested areas. Insects can clog the openings to the sensing chamber.
• Less than 12 inches (305 mm) away from fluorescent lights.
Electrical “noise” can interfere with the sensor.
• In “dead air” spaces. See “Avoiding Dead Air Spaces”.
AVOIDING DEAD AIR SPACES
“Dead air” spaces may prevent smoke from reaching the Smoke/CO Alarm. To
avoid dead air spaces, follow installation recommendations below.
On ceilings, install Smoke/CO Alarms as close to the center of the ceiling as possible. If this is
not possible, install the Smoke/CO Alarm at least 4 inches (102 mm) from the wall or corner.
For wall mounting (if allowed by building codes), the top edge of Smoke/
CO Alarms should be placed between 4 inches (102 mm) and 12 inches (305
mm) from the wall/ceiling line, below typical “dead air” spaces.
On a peaked, gabled, or cathedral ceiling, install first Smoke/CO Alarm within 3
feet (0.9 meters) of the peak of the ceiling, measured horizontally. Additional Smoke/
CO Alarms may be required depending on the length, angle, etc. of the ceiling’s slope.
Refer to NFPA 72 for details on requirements for sloped or peaked ceilings.
WEEKLY TESTING
• NEVER use an open flame of any kind to test this unit. You might accidentally damage
or set fire to the unit or to your home. The built-in test switch accurately tests the
unit’s operation as required by Underwriters Laboratories, Inc. (UL). NEVER use
vehicle exhaust! Exhaust may cause permanent damage and voids your warranty.
• DO NOT stand close to the Alarm when the horn is sounding. Exposure at close range
may be harmful to your hearing. When testing, step away when horn starts sounding.
It is important to test this unit every week to make sure it is working properly.
Using the test button is the recommended way to test this Smoke/CO Alarm.
You can test this Smoke/CO Alarm: Press and hold the Test/
Silence button 3-5 seconds until unit starts to alarm.
During testing, you will see and hear the following sequence:
• The Horn will sound 3 beeps, pause, 3 beeps. The Power/
Smoke LED flashes Red and the CO LED will be Off.
• Next the Horn will sound 4 beeps, pause, 4 beeps. The Power/
Smoke LED will be Off and the CO LED flashes Red.
If the unit does not alarm, make sure the batteries are correctly installed,
and test again. If the unit still does not alarm, replace it immediately.
HOW TO INSTALL THIS ALARM
Da
This combination Smoke/CO Alarm was designed to be mounted on the ceiling
or wall. It is not a tabletop device. You must install this device on the ceiling or
wall as outlined below. Read “Where To Install This Alarm” before starting.
Tools you will need: pencil, drill with 3/16” or 5mm drill bit, flathead screwdriver, hammer.
PARTS OF THIS SMOKE/CO ALARM
1. Test/Silence Button
2. Battery Compartment
3. Power/Smoke Alarm LED
4. CO Alarm LED
• Do not connect this unit to any other alarm or auxiliary device. It is a
single-station unit that cannot be linked to other devices. Connecting
anything else to this unit may prevent it from working properly.
• Do not install this unit over an electrical junction box. Air currents around junction
boxes can prevent smoke from reaching the sensing chamber and prevent the unit from
alarming. Only AC powered units are intended for installation over junction boxes.
Da
If you want to lock the battery compartment, or lock the Smoke/CO Alarm to the mounting
bracket, please read the “Optional Locking Features” section located at www.firstalert.com.
1. Hold base firmly and twist the mounting bracket
counterclockwise (left) to separate it from the unit.
2. Hold the mounting bracket against the ceiling (or wall) so the vertical
mounting slot is aligned in the 12 o’clock position and trace around the
inside of the mounting slots (vertical and horizontal mounting).
3. Put the unit where it won’t get covered with dust when you drill the mounting holes.
4. Using a 3/16” (5 mm) drill bit, drill a hole through the center of the oval outlines you traced.
5. Insert the plastic screw anchors (in the plastic bag with screws) into the holes. Tap the screw
anchors gently with a hammer, if necessary, until they are flush with the ceiling or wall.
6. Line the mounting bracket up over the plastic screw anchors.
7. Screw the mounting bracket to the ceiling or wall through the
mounting slots using the two screws provided.
8. Before attaching the Alarm to the
bracket, insert the two (2) AA batteries
(included) into the battery compartment.
Match the terminals on the end of the
battery with the terminals on the unit.
Match “+” to “+” and “-” to “-.” If the
batteries are not fully inserted, the
unit cannot receive battery power.
NOTE: The unit may beep briefly
when you install the batteries. This
is normal. The GREEN Light flashes
about every 60 seconds when the
unit is receiving battery power.
The battery door will resist closing unless batteries are installed.
This warns you the unit will not operate without batteries.
9. Attach the Smoke/CO Alarm to the mounting
bracket. Line up the guides on the alarm’s
base with the guides on the mounting bracket.
When guides are lined up, turn the base
clockwise (right) until it snaps into place.
NOTE: Once the Smoke/CO Alarm is snapped
onto the mounting bracket, you can rotate the
Smoke/CO Alarm to adjust the alignment.
10. Test the Smoke/CO Alarm. See
“Weekly Testing” for details.
OTHER Z-WAVE SYSTEMS
This product can be operated in any Z-Wave network with other Z-Wave certified devices
from other manufacturers. All non-battery operated nodes within the network will act
as repeaters regardless of the vendor to increase the reliability of the network.
ADD
1. Slide battery door open.
2. Insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
REMOVE
1. Slide battery door open.
2. Remove and re-insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
• The alarm will remain awake for 30 seconds on inclusion.
RESET DEVICE
If the device is powered up with the test button held down for 10+ seconds, the device will reset all
Z-Wave settings and leave the network.
Upon completion of the Reset operation, the LED will glow and the horn will sound for ~1 second.
Please use this procedure only when the network primary controller is missing or
otherwise inoperable.
NOTE: The device will not remain awake after resetting and will go into standby mode.
PROCEDURE TO MANUALLY WAKE-UP THE DEVICE
To manual wake-up the device, slide the battery door open wait for ~5 seconds and then slide
the battery drawer closed. Upon power-up, the device will send the wake-up notification.
DSK LOCATION ON THE PRODUCT
The QR code and the 5-digit DSK pin can be found on the product nameplate which is located on
the back of the product. The Full DSK string can be found on the product insert, available inside the
product packaging.
For more information on Z-Wave specifications, visit www.firstalert.com/zwaveinfo.
REGULAR MAINTENANCE
This unit has been designed to be as maintenance-free as possible, but there
are a few simple things you must do to keep it working properly.
• Test it at least once a week.
• Clean the Smoke/CO Alarm at least once a month; gently vacuum the outside of the Smoke/CO
Alarm using your household vacuum’s soft brush attachment. A can of clean compressed air (sold
at computer or office supply stores) may also be used. Follow manufacturer instructions for use.
Test the Smoke/CO Alarm. Never use water, cleaners or solvents since they may damage the unit.
• If the Smoke/CO Alarm becomes contaminated by excessive dirt, dust and/or grime,
and cannot be cleaned to avoid unwanted alarms, replace the unit immediately.
• Relocate the unit if it sounds frequent unwanted alarms. See
“Where This Alarm Should Not Be Installed” for details.
Choosing a replacement battery:
Your Smoke/CO Alarm requires two standard AA batteries. The following batteries are acceptable as
replacements: Energizer E91, Duracell MN1500/LR6. These batteries are available at many local
retail stores.
• Always use the exact batteries specified by this User’s Manual. DO NOT use
rechargeable batteries. Clean the battery contacts and also those of the device prior
to battery installation. Install batteries correctly with regard to polarity (+ and -).
• Please dispose of or recycle used batteries properly, following any local
regulations. Consult your local waste management authority or recycling
organization to find an electronics recycling facility in your area. DO NOT
DISPOSE OF BATTERIES IN FIRE. BATTERIES MAY EXPLODE OR LEAK.
• Constant exposure to high or low temperatures or high humidity may reduce battery life.
• Keep battery out of reach of children. In the event a battery is swallowed,
immediately contact your poison control center, your physician, or the National
Battery Ingestion hotline at 202-625-3333 as serious injury may occur.
Da
Actual battery service life depends on the Smoke/CO Alarm and the environment in which
it is installed. All the batteries specified above are acceptable replacement batteries for
this unit. Regardless of the manufacturer’s suggested battery life, you MUST replace
the battery immediately once the unit starts “chirping” (the “low battery warning”).
To replace the batteries (without removing
Alarm from the ceiling or wall):
1. Open the battery compartment.
2. Press tabs A and B as shown in the
diagram and remove each battery.
3. Insert the new batteries, making sure they
snap completely into the battery compartment.
Match the terminals on the ends of the
batteries with the terminals on the unit.
4. Close the battery compartment, and then test
the unit by pressing the Test/Silence button.
AB
IF YOUR SMOKE/CO ALARM SOUNDS
WHAT TO DO FIRST–IDENTIFY THE TYPE OF ALARM
Type of Alarm What You See and Hear
Carbon Monoxide (CO)
CO LED: Flashes Red
Horn: 4 beeps, pause, 4 beeps, pause
Power/Smoke LED: Off
Smoke
Power/Smoke LED: Flashes Red
Horn: 3 beeps, pause, 3 beeps, pause
CO LED: Off
IF THE CO ALARM SOUNDS
“ALARM-MOVE TO FRESH AIR”
If you hear the CO alarm horn and the CO red light is flashing, move
everyone to a source of fresh air. DO NOT remove the batteries!
Actuation of your CO Alarm indicates the presence of carbon monoxide (CO) which
can kill you. In other words, when your CO Alarm sounds, you must not ignore it!
IF THE CO ALARM SIGNAL SOUNDS:
1. Operate the Test/Silence button.
2. Call your emergency services, fire department or 911. Write down
the number of your local emergency service here:
__________________________________________________________________
3. Immediately move to fresh air—outdoors or by an open door or window. Do a head count
to check that all persons are accounted for. Do not re-enter the premises, or move away
from the open door or window until the emergency services responder has arrived, the
premises have been aired out, and your CO Alarm remains in its normal condition.
4. After following steps 1-3, if your CO Alarm reactivates within a 24-hour period, repeat steps
1-3 and call a qualified appliance technician to investigate for sources of CO from fuel-burning
equipment and appliances, and inspect for proper operation of this equipment. If problems are
identified during this inspection have the equipment serviced immediately. Note any combustion
equipment not inspected by the technician, and consult the manufacturers’ instructions, or
contact the manufacturers directly, for more information about CO safety and this equipment.
Make sure that motor vehicles are not, and have not, been operating in an attached garage or
adjacent to the residence. Write down the number of a qualified appliance technician here:
__________________________________________________________________
NOTE: A qualified appliance technician is defined as “a person, firm, corporation, or company that
either in person or through a representative, is engaged in and responsible for the installation, testing,
servicing, or replacement of heating, ventilation, air conditioning (HVAC) equipment, combustion
appliances and equipment, and/or gas fireplaces or other decorative combustion equipment.”
IF THE SMOKE ALARM SOUNDS
RESPONDING TO AN ALARM
• If the unit alarms and you are not testing the unit, it is warning you of a
potentially dangerous situation that requires your immediate attention. NEVER
ignore any alarm. Ignoring the alarm may result in injury or death.
• Never remove the batteries from a battery operated Smoke/CO Alarm to stop an
unwanted alarm (caused by cooking smoke, etc.). Removing batteries disables
the alarm so it cannot sense smoke, and removes your protection. Instead open a
window or fan the smoke away from the unit. The alarm will reset automatically.
• If the unit alarms get everyone out of the house immediately.
WHAT TO DO IN CASE OF FIRE
Don’t panic; stay calm. Follow your family escape plan.
Get out of the house as quickly as possible. Don’t stop to get dressed or collect anything.
Feel doors with the back of your hand before opening them. If a door is cool, open it slowly.
Don’t open a hot door. Keep doors and windows closed, unless you must escape through them.
Cover your nose and mouth with a cloth (preferably damp). Take short, shallow breaths.
Meet at your planned meeting place outside your home, and do a
head count to make sure everybody got out safely.
Call the Fire Department as soon as possible from outside. Give your address, then your name.
Never go back inside a burning building for any reason.
Contact your Fire Department for ideas on making your home safer.
Alarms have various limitations. See “General Limitations of Smoke/CO Alarms” for details.
USING THE SILENCE FEATURES
Never remove the batteries to quiet an unwanted alarm. Removing the
batteries disables the alarm and removes your protection.
The Silence Feature is intended to temporarily silence the horn while you
identify and correct the problem. Do not use the Silence Feature in emergency
situations. It will not correct a CO problem or extinguish a fire.
The Silence Feature can temporarily quiet an unwanted alarm for several minutes.
Press the Test/Silence button on the alarm cover for at least 3-5 seconds.
After the Test/Silence button is released, the Red LED blinks during the silence mode.
When the Smoke Alarm is Silenced When the CO Alarm is Silenced
The Smoke Alarm will remain silent for up to
15 minutes, then return to normal operation.
If the smoke has not cleared–or continues to
increase–the device will go back into alarm.
The CO alarm will remain silent
for up to 4 minutes.
After 4 minutes, if CO levels remain potentially
dangerous the horn will start sounding again.
SILENCING THE LOW BATTERY WARNING
This silence feature can temporarily quiet the low battery warning “chirp” for
up to 8 hours. Press the Test/Silence button on the alarm cover.
Once the low battery warning “chirp” silence feature is activated, the unit continues to flash the
Green light once a minute for 8 hours. After 8 hours, the low battery “chirp” will resume. Replace
the batteries as soon as possible; this unit will not operate without battery power!
To deactivate this feature: Press the Test/Silence button again. The unit will go into Test Mode
and the low battery warning will resume (LED flashes and unit sounds “chirp” once a minute).
SILENCING THE END OF LIFE SIGNAL
This silence feature can temporarily quiet the End of Life warning “chirp” for up to 2 days.
You can silence the End of Life warning “chirp” by pressing the Test/Silence button. The
horn will chirp, acknowledging that the End of Life silence feature has been activated.
After approximately 2 days, the End of Life “chirp” will resume.
WHAT YOU NEED TO KNOW ABOUT CO
WHAT IS CO?
CO is an invisible, odorless, tasteless gas produced when fossil fuels do not burn completely,
or are exposed to heat (usually fire). Electrical appliances typically do not produce CO.
These fuels include: Wood, coal, charcoal, oil, natural gas, gasoline, kerosene, and propane.
Common appliances are often sources of CO. If they are not properly maintained,
are improperly ventilated, or malfunction, CO levels can rise quickly. CO is a real
danger now that homes are more energy efficient. “Air-tight” homes with added
insulation, sealed windows, and other weatherproofing can “trap” CO inside.
SYMPTOMS OF CO POISONING
These symptoms are related to CO POISONING and should
be discussed with ALL household members.
Mild Exposure: Slight headache, nausea, vomiting, fatigue (“flu-like” symptoms).
Medium Exposure: Throbbing headache, drowsiness, confusion, fast heart rate.
Extreme Exposure: Convulsions, unconsciousness, heart and lung failure.
Exposure to Carbon Monoxide can cause brain damage, death.
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This CO Alarm measures exposure to CO over time. It alarms if CO levels are extremely
high in a short period of time, or if CO levels reach a certain minimum over a long period of
time. The CO Alarm generally sounds an alarm before the onset of symptoms in average,
healthy adults. Why is this important? Because you need to be warned of a potential CO
problem while you can still react in time. In many reported cases of CO exposure, victims
may be aware that they are not feeling well, but become disoriented and can no longer
react well enough to exit the building or get help. Also, young children and pets may be the
first affected. The average healthy adult might not feel any symptoms when the CO Alarm
sounds. However, people with cardiac or respiratory problems, infants, unborn babies,
pregnant mothers, or elderly people can be more quickly and severely affected by CO. If
you experience even mild symptoms of CO poisoning, consult your doctor immediately!
FINDING THE SOURCE OF CO AFTER AN ALARM
Carbon monoxide is an odorless, invisible gas, which often makes it difficult to locate the source of
CO after an alarm. These are a few of the factors that can make it difficult to locate sources of CO:
• House well ventilated before the investigator arrives.
• Problem caused by “backdrafting.”
• Transient CO problem caused by special circumstances.
Because CO may dissipate by the time an investigator arrives, it may be
difficult to locate the source of CO. BRK Brands, Inc. shall not be obligated
to pay for any carbon monoxide investigation or service call.
POTENTIAL SOURCES OF CO IN THE HOME
Fuel-burning appliances like: portable
heater, gas or wood burning fireplace, gas
kitchen range or cooktop, gas clothes dryer.
Damaged or insufficient venting:
corroded or disconnected water heater
vent pipe, leaking chimney pipe or flue,
or cracked heat exchanger, blocked
or clogged chimney opening.
Improper use of appliance/
device: operating a barbecue grill
or vehicle in an enclosed area (like
a garage or screened porch).
Transient CO Problems: “transient”
or on-again-off-again CO problems
can be caused by outdoor conditions
and other special circumstances.
The following conditions can result in transient CO situations:
1. Excessive spillage or reverse venting of fuel appliances caused by outdoor conditions such as:
• Wind direction and/or velocity, including high, gusty winds. Heavy air in the
vent pipes (cold/humid air with extended periods between cycles).
• Negative pressure differential resulting from the use of exhaust fans.
• Several appliances running at the same time competing for limited fresh air.
• Vent pipe connections vibrating loose from clothes dryers, furnaces, or water heaters.
• Obstructions in or unconventional vent pipe designs which can amplify the above situations.
2. Extended operation of unvented fuel burning devices (range, oven, fireplace).
3. Temperature inversions, which can trap exhaust close to the ground.
4. Car idling in an open or closed attached garage, or near a home.
These conditions are dangerous because they can trap exhaust in your home. Since these
conditions can come and go, they are also hard to recreate during a CO investigation.
HOW CAN I PROTECT MY FAMILY
FROM CO POISONING?
A CO Alarm is an excellent means of protection. It monitors the air and sounds a loud
alarm before Carbon Monoxide levels become threatening for average, healthy adults.
A CO Alarm is not a substitute for proper maintenance of home appliances.
To help prevent CO problems and reduce the risk of CO poisoning:
• Clean chimneys and flues yearly. Keep them free of debris, leaves, and nests for
proper air flow. Also, have a professional check for rust and corrosion, cracks,
or separations. These conditions can prevent proper air movement and cause
backdrafting. Never “cap” or cover a chimney in any way that would block air flow.
• Test and maintain all fuel-burning equipment annually. Many local gas or oil
companies and HVAC companies offer appliance inspections for a nominal fee.
• Make regular visual inspections of all fuel-burning appliances. Check appliances for
excessive rust and scaling. Also check the flame on the burner and pilot lights. The
flame should be blue. A yellow flame means fuel is not being burned completely and CO
may be present. Keep the blower door on the furnace closed. Use vents or fans when
they are available on all fuel-burning appliances. Make sure appliances are vented to
the outside. Do not grill or barbecue indoors, or in garages or on screen porches.
• Check for exhaust backflow from CO sources. Check the draft hood on an operating
furnace for a backdraft. Look for cracks on furnace heat exchangers.
• Check the house or garage on the other side of shared wall.
• Keep windows and doors open slightly. If you suspect that CO is escaping into your home,
open a window or a door. Opening windows and doors can significantly decrease CO levels.
In addition, familiarize yourself with all enclosed materials. Read this manual in its
entirety, and make sure you understand what to do if your CO Alarm sounds.
REGULATORY INFORMATION FOR SMOKE/CO ALARMS
REGULATORY INFORMATION FOR CO ALARMS
WHAT LEVELS OF CO CAUSE AN ALARM?
Underwriters Laboratories Inc. Standard UL2034 requires residential CO Alarms
to sound when exposed to levels of CO and exposure times as described below.
They are measured in parts per million (ppm) of CO over time (in minutes).
UL2034 Required Alarm Points*:
• If the alarm is exposed to 400 ppm of CO, IT MUST ALARM BETWEEN 4 and 15 MINUTES.
• If the alarm is exposed to 150 ppm of CO, IT MUST ALARM BETWEEN 10 and 50 MINUTES.
• If the alarm is exposed to 70 ppm if CO, IT MUST ALARM BETWEEN 60 and 240 MINUTES.
*Approximately 10% COHb exposure at levels of 10% to 95% Relative Humidity (RH).
The unit is designed not to alarm when exposed to a constant level of 30 ppm for 30 days.
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CO Alarms are designed to alarm before there is an immediate life threat.
Since you cannot see or smell CO, never assume it’s not present.
• An exposure to 100 ppm of CO for 20 minutes may not affect average, healthy
adults, but after 4 hours the same level may cause headaches.
• An exposure to 400 ppm of CO may cause headaches in average, healthy
adults after 35 minutes, but can cause death after 2 hours.
Standards: Underwriters Laboratories Inc. Single and Multiple
Station carbon monoxide alarms UL2034.
According to Underwriters Laboratories Inc. UL2034, Section 1-1.2: “Carbon monoxide alarms
covered by these requirements are intended to respond to the presence of carbon monoxide from
sources such as, but not limited to, exhaust from internal-combustion engines, abnormal operation
of fuel-fired appliances, and fireplaces. CO Alarms are intended to alarm at carbon monoxide
levels below those that could cause a loss of ability to react to the dangers of Carbon Monoxide
exposure.” This CO Alarm monitors the air at the Alarm, and is designed to alarm before CO levels
become life threatening. This allows you precious time to leave the house and correct the problem.
This is only possible if Alarms are located, installed, and maintained as described in this manual.
Gas Detection at Typical Temperature and Humidity Ranges: The CO Alarm is not formulated
to detect CO levels below 30 ppm typically. UL tested for false alarm resistance to Methane (500
ppm), Butane (300 ppm), Heptane (500 ppm), Ethyl Acetate (200 ppm), Isopropyl Alcohol (200 ppm)
and Carbon Dioxide (5000 ppm). Values measure gas and vapor concentrations in parts per million.
Audible Alarm: 85 dB minimum at 10 feet (3 meters).
Printed in Mexico M08-0456-169793_1044807 K1 02/20
REGULATORY INFORMATION FOR SMOKE ALARMS
RECOMMENDED LOCATIONS FOR SMOKE ALARMS
Installing Smoke Alarms in Single-Family Residences
The National Fire Protection Association (NFPA), recommends one Smoke Alarm on every floor,
in every sleeping area, and in every bedroom. In new construction, the Smoke Alarms must be
AC powered and interconnected. See “Agency Placement Recommendations” for details.
For additional coverage, it is recommended that you install a Smoke Alarm in all
rooms, halls, storage areas, finished attics, and basements, where temperatures
normally remain between 40˚ F (4.4˚ C) and 100˚ F (37.8˚ C). Make sure no door or
other obstruction could keep smoke from reaching the Smoke Alarms.
More specifically, install Smoke Alarms:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet long (12 meters), install a unit at each end.
• At the top of the first-to-second floor stairway, and at the bottom of the basement stairway.
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Specific requirements for Smoke Alarm installation vary from state to state and from region to region.
Check with your local Fire Department for current requirements in your area. It is recommended AC
or AC/DC units be interconnected for added protection.
AGENCY PLACEMENT RECOMMENDATIONS
Standards: Underwriters Laboratories Inc. Single and Multiple Station Smoke Alarms 217.
NFPA 72 Chapter 29
“For your information, the National Fire Alarm and Signaling Code, NFPA 72, reads as follows:”
29.5.1* Required Detection.
29.5.1.1* Where required by other governing laws, codes, or standards for a specific type of
occupancy, approved single and multiple-station smoke alarms shall be installed as follows:
(1) *In all sleeping rooms and guest rooms
(2) *Outside of each separate dwelling unit sleeping area, within 21 ft (6.4 m) of any
door to a sleeping room, with the distance measured along a path of travel
(3) On every level of a dwelling unit, including basements
(4) On every level of a residential board and care occupancy (small facility),
including basements and excluding crawl spaces and unfinished attics
(5) *In the living area(s) of a guest suite
(6) In the living area(s) of a residential board and care occupancy (small facility)
(Reprinted with permission from NFPA 72®, National Fire Alarm and Signaling Code Copyright © 2010
National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the complete
and official position of the National Fire Protection Association, on the referenced subject which is
represented only by the standard in its entirety), (National Fire Alarm and Signaling Code®and NFPA
72®are registered trademarks of the National Fire Protection Association, Inc., Quincy, MA 02269).
California State Fire Marshal (CSFM)
Early warning detection is best achieved by the installation of fire detection equipment
in all rooms and areas of the household as follows: A Smoke Alarm installed in each
separate sleeping area (in the vicinity, but outside bedrooms), and Heat or Smoke Alarms
in the living rooms, dining rooms, bedrooms, kitchens, hallways, finished attics, furnace
rooms, closets, utility and storage rooms, basements, and attached garages.
ABOUT SMOKE ALARMS
Battery (DC) operated Smoke Alarms: Provide protection even when
electricity fails, provided the batteries are fresh and correctly installed. Units
are easy to install, and do not require professional installation.
AC powered Smoke Alarms: Can be interconnected so if one unit senses smoke,
all units alarm. They do not operate if electricity fails. AC with battery (DC) back-
up: will operate if electricity fails, provided the batteries are fresh and correctly
installed. AC and AC/DC units must be installed by a qualified electrician.
Smoke/CO Alarms for Solar or Wind Energy users and battery backup power systems:
AC powered Smoke/CO Alarms should only be operated with true or pure sine wave inverters.
Operating this Alarm with most battery-powered UPS (uninterruptible power supply) products
or square wave or “quasi sine wave” inverters will damage the Alarm. If you are not sure
about your inverter or UPS type, please consult with the manufacturer to verify.
Smoke Alarms for the hearing impaired: Special purpose Smoke Alarms should
be installed for the hearing impaired. They include a visual alarm and an audible
alarm horn, and meet the requirements of the Americans With Disabilities Act.
Can be interconnected so if one unit senses smoke, all units alarm.
ABOUT SMOKE ALARMS (CONTINUED)...
Smoke alarms are not to be used with detector guards unless the
combination has been evaluated and found suitable for that purpose.
All these Smoke Alarms are designed to provide early warning of fires if located, installed and
cared for as described in the user’s manual, and if smoke reaches the Alarm. If you are unsure
which type of Smoke Alarm to install, refer the National Fire Protection Association (NFPA)
Standard 72 (National Fire Alarm and Signaling Code) and NFPA 101 (Life Safety Code). National
Fire Protection Association, One Batterymarch Park, Quincy, MA 02269-9101. Local building
codes may also require specific units in new construction or in different areas of the home.
SPECIAL COMPLIANCE CONSIDERATIONS
This Smoke Alarm is suitable for use in apartments, condominiums, townhouses, hospitals, day
care facilities, health care facilities, boarding houses, group homes and dormitories provided
a primary fire detection system already exists to meet fire detection requirements in common
areas like lobbies, hallways, or porches. Using this Smoke Alarm in common areas may not
provide sufficient warning to all residents or meet local fire protection ordinances/regulations.
This Smoke Alarm alone is not a suitable substitute for complete fire detection systems
in places housing many people—like apartment buildings, condominiums, hotels, motels,
dormitories, hospitals, health care facilities, nursing homes, day care facilities, or group homes
of any kind. It is not a suitable substitute for complete fire detection systems in warehouses,
industrial facilities, commercial buildings, and special-purpose non-residential buildings which
require special fire detection and alarm systems. Depending on the building codes in your
area, this Smoke Alarm may be used to provide additional protection in these facilities.
In new construction, most building codes require the use of AC or AC/DC powered Smoke
Alarms only. In existing construction, AC, AC/DC, or DC powered Smoke Alarms can be used
as specified by local building codes. Refer to NFPA 72 (National Fire Alarm and Signaling
Code) and NFPA 101 (Life Safety Code), local building codes, or consult your Fire Department
for detailed fire protection requirements in buildings not defined as “households”.
HUD MAP PROGRAM
Certain HUD battery powered Smoke Alarm applications, especially those that fall under
HUD 223(f) MAP (Multi-family Accelerated Processing), may require a 10 Year sealed tamper
resistant battery. This alarm does not meet that requirement. Substitute First Alert SA340B.
GENERAL LIMITATIONS OF SMOKE/CO ALARMS
This Smoke/CO Alarm is intended for residential use. It is not intended for use in industrial
applications where Occupational Safety and Health Administration (OSHA) requirements for
Carbon Monoxide Alarms must be met. The Smoke Alarm portion of this device is not intended
to alert hearing impaired residents. Special purpose Smoke Alarms should be installed for
hearing impaired residents (CO Alarms are not yet available for the hearing impaired).
Smoke/CO Alarms may not waken all individuals. Practice the escape plan at least twice a year,
making sure that everyone is involved – from kids to grand- parents. Allow children to master fire
escape planning and practice before holding a fire drill at night when they are sleeping. If children
or others do not readily waken to the sound of the Smoke/CO Alarm, or if there are infants or
family members with mobility limitations, make sure that someone is assigned to assist them in
fire drill and in the event of an emergency. It is recommended that you hold a fire drill while family
members are sleeping in order to determine their response to the sound of the Smoke/CO Alarm
while sleeping and to determine whether they may need assistance in the event of an emergency.
Smoke/CO Alarms cannot work without power. Battery operated units cannot work if the batteries
are missing, disconnected or dead, if the wrong type of batteries are used, or if the batteries are not
installed correctly. AC units cannot work if the AC power is cut off for any reason (open fuse or circuit
breaker, failure along a power line or at a power station, electrical fire that burns the electrical wires,
etc.). If you are concerned about the limitations of battery or AC power, install both types of units.
This Smoke/CO Alarm will not sense smoke or CO that does not reach the sensors. It will
only sense smoke or CO at the sensor. Smoke or CO may be present in other areas. Doors or other
obstructions may affect the rate at which CO or smoke reaches the sensors. If bedroom doors are
usually closed at night, we recommend you install an alarm device (Combination CO and Smoke
Alarm, or separate CO Alarms and Smoke Alarms) in each bedroom and in the hallway between them.
This Smoke/CO Alarm may not sense smoke or CO on another level of the home. Example:
This alarm device, installed on the second floor, may not sense smoke or CO in the basement.
For this reason, one alarm device may not give adequate early warning. Recommended minimum
protection is one alarm device in every sleeping area, every bedroom, and on every level of your
home. Some experts recommend battery powered Smoke and CO Alarms be used in conjunction
with interconnected AC powered Smoke Alarms. For details, see “About Smoke Alarms” for details.
Smoke/CO Alarms may not be heard. The alarm horn loudness meets or exceeds current
UL standards of 85 dB at 10 feet (3 meters). However, if the Smoke/CO Alarm is installed
outside the bedroom, it may not wake up a sound sleeper or one who has recently used
drugs or has been drinking alcoholic beverages. This is especially true if the door is closed
or only partly open. Even persons who are awake may not hear the alarm horn if the sound
is blocked by distance or closed doors. Noise from traffic, stereo, radio, television, air
conditioner, or other appliances may also prevent alert persons from hearing the alarm
horn. This Smoke/CO Alarm is not intended for people who are hearing impaired.
The Alarm may not have time to alarm before the fire itself causes damage,
injury, or death, since smoke from some fires may not reach the unit
immediately. Examples of this include persons smoking in bed, children playing with
matches, or fires caused by violent explosions resulting from escaping gas.
This Smoke/CO Alarm is not a substitute for life insurance. Though this Smoke/CO Alarm
warns against increasing CO levels or the presence of smoke, BRK Brands, Inc. does not warrant or
imply in any way that they will protect lives. Homeowners and renters must still insure their lives.
This Smoke/CO Alarm has a limited life. Although this Smoke/CO Alarm and all
of its parts have passed many stringent tests and are designed to be as reliable as
possible, any of these parts could fail at any time. Therefore, you must test this device
weekly. The unit should be replaced immediately if it is not operating properly.
This Smoke/CO Alarm is not foolproof. Like all other electronic devices, this Smoke/CO Alarm
has limitations. It can only detect smoke or CO that reaches the sensors. It may not give early
warning of the source of smoke or CO is in a remote part of the home, away from the alarm device.
Z-Wave Mesh Network Limitations 1. Alarms are single stationed Alarms and are
not interconnected to each other. 2. Only initiating Alarms will sound. 3. Z-Wave
system is not listed as a life safety system. Mesh network system only provides
supplemental notifications and should not be counted on for life safety.
TROUBLESHOOTING GUIDE
IF THE ALARM... PROBLEM... YOU SHOULD...
Horn “chirps” and LED flashes GREEN about once per minute. Low battery warning. Install two new AA batteries*.
Horn “chirps” 3 times every minute; LED
flashes GREEN 3 rapid flashes.
MALFUNCTION SIGNAL. Device is not working
properly, and needs to be replaced.
Units under warranty should be returned to manufacturer
for replacement. See “Limited Warranty” for details.
Horn “chirps” 5 times every minute; LED
flashes GREEN 5 rapid flashes. END OF LIFE SIGNAL. Alarm needs to be replaced. Immediately replace the Alarm.
Carbon Monoxide Alarm ONLY:
CO Alarm goes back into alarm 4 minutes after you Silence it. CO levels indicate a potentially dangerous situation.
IF YOU ARE FEELING SYMPTOMS OF CO POISONING,
EVACUATE your home and call 911 or the Fire Department.
Refer to “If The CO Alarm Sounds” for details.
CO Alarm sounds frequently even though no high
levels of CO are revealed in an investigation.
The CO Alarm may be improperly located. Refer
to “Where to Install This Alarm” for details.
Relocate your Alarm. If frequent alarms continue, have
home rechecked for potential CO problems. You may
be experiencing an intermittent CO problem.
Smoke Alarm ONLY:
Smoke Alarm sounds when no smoke is visible. Unwanted alarm may be caused by non-
emergency source like cooking smoke.
Silence Alarm using manual button; clean the Alarm’s
cover with a soft, clean cloth. If frequent unwanted alarms
continue, relocate your Alarm. Alarm may be too close to
a kitchen, cooking appliance, or steamy bathroom.
*For a list of acceptable replacement batteries, see “Regular Maintenance.”
If you have any questions that cannot be answered by reading this manual, call the Customer Service Team: 1-800-323-9005.
LIMITED WARRANTY
BRK Brands, Inc., (“BRK”) the maker of First Alert®brand and BRK®brand products, warrants that for a period of ten years from the date of purchase, this product will be free from defects in
material and workmanship. BRK, at its option, will repair or replace this product or any component of the product found to be defective during the warranty period. Replacement will be made with a
new or remanufactured product or component. If the product is no longer available, replacement may be made with a similar product of equal or greater value. This is your exclusive warranty.
This warranty is valid for the original retail purchaser from the date of initial retail purchase and is not transferable. Keep the original sales receipt. Proof of purchase is required to obtain warranty
performance. BRK dealers, service centers, or retail stores selling BRK products do not have the right to alter, modify or any way change the terms and conditions of this warranty.
This warranty does not cover normal wear of parts or damage resulting from any of the following: negligent use or misuse of the product, use on improper
voltage or current, use contrary to the operating instructions, disassembly, repair or alteration by anyone other than BRK or an authorized service center. Further,
the warranty does not cover Acts of God, such as fire, flood, hurricanes and tornadoes or any batteries that are included with this unit.
BRK shall not be liable for any incidental or consequential damages caused by the breach of any express or implied warranty. Except to the extent prohibited by applicable law,
any implied warranty of merchantability or fitness for a particular purpose is limited in duration to the duration of the above warranty. Some states, provinces or jurisdictions
do not allow the exclusion or limitation of incidental or consequential damages or limitations on how long an implied warranty lasts, so the above limitations or exclusion
may not apply to you. This warranty gives you specific legal rights, and you may also have other rights that vary from state to state or province to province.
How to Obtain Warranty Service
Service: If service is required, do not return the product to your retailer. In order to obtain warranty service, contact the Customer Service Team at
1-800-323-9005. To assist us in serving you, please have the model number and date of purchase available when calling.
For Warranty Service return to: 1301 Joe Battle, El Paso, TX 79936
Battery: BRK Brands, Inc. make no warranty, express or implied, written or oral, including that of merchantability or fitness for any particular purpose with respect to battery.
Visit www.firstalert.com for more information.
For your records, please record:
Date Purchased: ______________/_________________Month/Year
Where Purchased: ____________________________________________
Date Installed: ____________/____________Month/Year
Replace alarm 7 years after installation. Please write the date in the
space provided: __________/__________ Month/Year
The alarm will also provide an audible End-of-Life Signal approximately
7 years after installation to remind you to replace the unit.
The End-of-Life Signal can be silenced for up to 2 days. Do not unplug
the alarm or remove the batteries until you get replacement.
A copy of the manual can be found at www.firstalert.com/products.

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USER’S MANUAL
COMBINATION CARBON
MONOXIDE & SMOKE ALARM
IMPORTANT! PLEASE READ CAREFULLY AND SAVE.
This user’s manual contains important information about your Combination Carbon
Monoxide & Smoke Alarm’s operation. If you are installing this Alarm for use by
others, you must leave this manual— or a copy of it—with the end user.
Separate sensors to detect smoke and CO;
the two alarm systems work independently
Powered by two “AA” batteries
Side access drawer for easy battery replacement
Printed in Mexico
M08-0456-169793_1044807 K1 02/20
CONFORMS TO
UL STD 217 AND UL STD 2034 Model ZCOMBO
Sku 1044807
© 2020 BRK Brands, Inc. All rights reserved. •Distributed by BRK Brands, Inc.
Aurora, IL 60504 •BRK Brands, Inc. is a subsidiary of Newell Brands Inc. (NASDAQ: NWL)
Customer Service Team: [phone] •www.firstalert.com •www.brkelectronics.com
All First Alert®and BRK®Smoke Alarms conform to regulatory requirements,
including UL217 and are designed to detect particles of combustion. Smoke
particles of varying number and size are produced in all fires.
Ionization technology is generally more sensitive than photoelectric technology at
detecting small particles, which tend to be produced in greater amounts by flaming
fires, which consume combustible materials rapidly and spread quickly. Sources of
these fires may include paper burning in a wastebasket, or a grease fire in the kitchen.
Photoelectric technology is generally more sensitive than ionization technology
at detecting large particles, which tend to be produced in greater amounts
by smoldering fires, which may smolder for hours before bursting into flame.
Sources of these fires may include cigarettes burning in couches or bedding.
For maximum protection, use both types of Smoke Alarms on
each level and in every bedroom of your home.
INTRODUCTION
FIRE SAFETY TIPS
Follow safety rules and prevent hazardous situations: 1) Use smoking materials properly. Never
smoke in bed. 2) Keep matches or lighters away from children; 3) Store flammable materials in
proper containers; 4) Keep electrical appliances in good condition and don’t overload electrical
circuits; 5) Keep stoves, barbecue grills, fireplaces and chimneys grease- and debris-free; 6)
Never leave anything cooking on the stove unattended; 7) Keep portable heaters and open
flames, like candles, away from flammable materials; 8) Don’t let rubbish accumulate.
Keep alarms clean, and test them weekly. Replace alarms immediately if they are not working
properly. Smoke Alarms that do not work cannot alert you to a fire. Keep at least one working
fire extinguisher on every floor, and an additional one in the kitchen. Have fire escape ladders
or other reliable means of escape from an upper floor in case stairs are blocked.
BASIC SAFETY INFORMATION
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• Dangers, Warnings, and Cautions alert you to important operating instructions
or to potentially hazardous situations. Pay special attention to these items.
• This Smoke/CO Alarm is approved for use in single-family
residences. It is NOT designed for marine or RV use.
• This combination Smoke/Carbon Monoxide Alarm has two separate alarms. The CO
Alarm is not designed to detect fire or any other gas. It will only indicate the presence
of carbon monoxide gas at the sensor. Carbon monoxide gas may be present in
other areas. The Smoke Alarm will only indicate the presence of smoke that reaches
the sensor. The Smoke Alarm is not designed to sense gas, heat or flames.
• This Smoke/CO Alarm cannot operate without working batteries.
Removing the batteries for any reason, or failing to replace the batteries
at the end of their service life, removes your protection.
• NEVER ignore any alarm. See “If Your Smoke/CO Alarm Sounds” for more information
on how to respond to an alarm. Failure to respond can result in injury or death.
• The Silence Features are for your convenience only and will not correct a problem.
See “Using the Silence Features” for details. Always check your home for a
potential problem after any alarm. Failure to do so can result in injury or death.
• Test this Smoke/CO Alarm once a week. If the Alarm ever fails to test correctly, have it
replaced immediately! If the Alarm is not working properly, it cannot alert you to a problem.
• This product is intended for use in ordinary indoor locations of family living units.
It is not designed to measure CO levels in compliance with Occupational Safety
and Health Administration (OSHA) commercial or industrial standards. Individuals
with medical conditions that may make them more sensitive to carbon monoxide
may consider using warning devices which provide audible and visual signals
for carbon monoxide concentrations under 30 ppm. For additional information
on carbon monoxide and your medical condition contact your physician.
FCC COMPLIANCE
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that the interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that of the receiver.
• Consult the dealer or an experienced radio or TV technician for help.
Changes or modifications to the product, not expressly approved by First Alert /
BRK Brands, Inc., could void the user’s authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
INSTALLATION
WHERE TO INSTALL THIS ALARM
Minimum coverage for Smoke Alarms, as recommended by the National Fire Protection
Association (NFPA), is one Smoke Alarm on every floor, in every sleeping area, and in every bedroom
(See “Regulatory Information For Smoke Alarms” for details on the NFPA recommendations).
For CO Alarms, the National Fire Protection Association (NFPA) recommends that
a CO Alarm should be centrally located outside of each separate sleeping area in
the immediate vicinity of the bedrooms. For added protection, install additional
CO Alarms in each separate bedroom, and on every level of your home.
NOTE: For added protection, install an additional Smoke/CO Alarm at least 15 feet (4.6 meters)
away from the furnace or fuel burning heat source where possible. In smaller homes or in
manufactured homes where this distance cannot be maintained, install the Alarm as far away as
possible from the furnace or other fuel burning source. Installing the Alarm closer than 15 feet
(4.6 meters) will not harm the Alarm, but may increase the frequency of unwanted alarms.
To pair this ZCOMBO alarm to a Ring or other compatible Z-Wave network, download the
appropriate App and follow the instructions to Set up Device or Connect Device.
IN GENERAL, INSTALL COMBINATION SMOKE AND CARBON MONOXIDE ALARMS:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet (12 meters) long, install a unit at each end.
• At the top of first-to-second floor stairs.
• At the bottom of the basement stairs.
• For additional coverage, install Alarms in all rooms, halls, and storage areas, where
temperatures normally remain between 40˚ F and 100˚ F (4.4˚ C and 37.8˚ C).
RECOMMENDED PLACEMENT
SUGGESTED AREAS FOR INSTALLING 
SMOKE ALARMS, CO ALARMS, AND COMBO UNITS
SMOKE ALARM WITH 
SILENCE FEATURE
CO ALARMS
BOTH, OR COMBINATION 
SMOKE/CO ALARMS
SMOKE ALARMS
KEY:
Suggested locations are based on
NFPA recommendations (NFPA 72 
for Smoke Alarms and NFPA 720 for
Carbon Monoxide Alarms). Always 
refer to national and local codes 
before beginning any installation.
In new construction AC and AC/DC smoke alarms MUST
be interconnected to meet NFPA recommendations.

• When installing on the wall, the top edge of Smoke Alarms should be placed
between 4 inches (102 mm) and 12 inches (305 mm) from the wall/ceiling line.
• When installing on the ceiling, place the alarm as close to the center as possible.
• In either case, install at least 4 inches (102 mm) from where the wall and
ceiling meet. See “Avoiding Dead Air Spaces” for more information.
NOTE: For any location, make sure no door or other obstruction could
keep carbon monoxide or smoke from reaching the Alarm.
Installing Smoke/CO Alarms in Mobile Homes
For minimum security install one Smoke/CO Alarm as close to each sleeping area as possible.
For more security, put one unit in each room. Many older mobile homes (especially those built
before 1978) have little or no insulation. If your mobile home is not well insulated, or if you
are unsure of the amount of insulation, it is important to install units on inside walls only.
WHERE THIS ALARM SHOULD NOT BE INSTALLED
DO NOT LOCATE THIS SMOKE/CO ALARM:
• In garages, furnace rooms, crawl spaces and unfinished attics.
Avoid extremely dusty, dirty or greasy areas.
WHERE THIS ALARM SHOULD NOT BE INSTALLED - DO NOT
LOCATE THIS SMOKE/CO ALARM (CONTINUED)...
• Where combustion particles are produced. Combustion particles form when something burns.
Areas to avoid include poorly ventilated kitchens, garages, and furnace rooms. Keep units at
least 20 feet (6 meters) from the sources of combustion particles (stove, furnace, water heater,
space heater) if possible. In areas where a 20-foot (6 meter) distance is not possible – in
modular, mobile, or smaller homes, for example – it is recommended the Smoke Alarm be
placed as far from these fuel-burning sources as possible. The placement recommendations
are intended to keep these Alarms at a reasonable distance from a fuel-burning source,
and thus reduce “unwanted” alarms. Unwanted alarms can occur if a Smoke Alarm is
placed directly next to a fuel-burning source. Ventilate these areas as much as possible.
• Within 5 feet (1.5 meters) of any cooking appliance. In air streams near kitchens. Air
currents can draw cooking smoke into the smoke sensor and cause unwanted alarms.
• In extremely humid areas. This Alarm should be at least 10 feet (3 meters) from a shower, sauna,
humidifier, vaporizer, dishwasher, laundry room, utility room, or other source of high humidity.
• In direct sunlight.
• In turbulent air, like near ceiling fans or open windows. Blowing air
may prevent CO or smoke from reaching the sensors.
• In areas where temperature is colder than 40˚ F (4.4˚ C) or hotter than 100˚F
(37.8˚ C). These areas include non-airconditioned crawl spaces, unfinished
attics, uninsulated or poorly insulated ceilings, porches, and garages.
• In insect infested areas. Insects can clog the openings to the sensing chamber.
• Less than 12 inches (305 mm) away from fluorescent lights.
Electrical “noise” can interfere with the sensor.
• In “dead air” spaces. See “Avoiding Dead Air Spaces”.
AVOIDING DEAD AIR SPACES
“Dead air” spaces may prevent smoke from reaching the Smoke/CO Alarm. To
avoid dead air spaces, follow installation recommendations below.
On ceilings, install Smoke/CO Alarms as close to the center of the ceiling as possible. If this is
not possible, install the Smoke/CO Alarm at least 4 inches (102 mm) from the wall or corner.
For wall mounting (if allowed by building codes), the top edge of Smoke/
CO Alarms should be placed between 4 inches (102 mm) and 12 inches (305
mm) from the wall/ceiling line, below typical “dead air” spaces.
On a peaked, gabled, or cathedral ceiling, install first Smoke/CO Alarm within 3
feet (0.9 meters) of the peak of the ceiling, measured horizontally. Additional Smoke/
CO Alarms may be required depending on the length, angle, etc. of the ceiling’s slope.
Refer to NFPA 72 for details on requirements for sloped or peaked ceilings.
WEEKLY TESTING
• NEVER use an open flame of any kind to test this unit. You might accidentally damage
or set fire to the unit or to your home. The built-in test switch accurately tests the
unit’s operation as required by Underwriters Laboratories, Inc. (UL). NEVER use
vehicle exhaust! Exhaust may cause permanent damage and voids your warranty.
• DO NOT stand close to the Alarm when the horn is sounding. Exposure at close range
may be harmful to your hearing. When testing, step away when horn starts sounding.
It is important to test this unit every week to make sure it is working properly.
Using the test button is the recommended way to test this Smoke/CO Alarm.
You can test this Smoke/CO Alarm: Press and hold the Test/
Silence button 3-5 seconds until unit starts to alarm.
During testing, you will see and hear the following sequence:
• The Horn will sound 3 beeps, pause, 3 beeps. The Power/
Smoke LED flashes Red and the CO LED will be Off.
• Next the Horn will sound 4 beeps, pause, 4 beeps. The Power/
Smoke LED will be Off and the CO LED flashes Red.
If the unit does not alarm, make sure the batteries are correctly installed,
and test again. If the unit still does not alarm, replace it immediately.
HOW TO INSTALL THIS ALARM
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This combination Smoke/CO Alarm was designed to be mounted on the ceiling
or wall. It is not a tabletop device. You must install this device on the ceiling or
wall as outlined below. Read “Where To Install This Alarm” before starting.
Tools you will need: pencil, drill with 3/16” or 5mm drill bit, flathead screwdriver, hammer.
PARTS OF THIS SMOKE/CO ALARM
1. Test/Silence Button
2. Battery Compartment
3. Power/Smoke Alarm LED
4. CO Alarm LED
• Do not connect this unit to any other alarm or auxiliary device. It is a
single-station unit that cannot be linked to other devices. Connecting
anything else to this unit may prevent it from working properly.
• Do not install this unit over an electrical junction box. Air currents around junction
boxes can prevent smoke from reaching the sensing chamber and prevent the unit from
alarming. Only AC powered units are intended for installation over junction boxes.
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If you want to lock the battery compartment, or lock the Smoke/CO Alarm to the mounting
bracket, please read the “Optional Locking Features” section located at www.firstalert.com.
1. Hold base firmly and twist the mounting bracket
counterclockwise (left) to separate it from the unit.
2. Hold the mounting bracket against the ceiling (or wall) so the vertical
mounting slot is aligned in the 12 o’clock position and trace around the
inside of the mounting slots (vertical and horizontal mounting).
3. Put the unit where it won’t get covered with dust when you drill the mounting holes.
4. Using a 3/16” (5 mm) drill bit, drill a hole through the center of the oval outlines you traced.
5. Insert the plastic screw anchors (in the plastic bag with screws) into the holes. Tap the screw
anchors gently with a hammer, if necessary, until they are flush with the ceiling or wall.
6. Line the mounting bracket up over the plastic screw anchors.
7. Screw the mounting bracket to the ceiling or wall through the
mounting slots using the two screws provided.
8. Before attaching the Alarm to the
bracket, insert the two (2) AA batteries
(included) into the battery compartment.
Match the terminals on the end of the
battery with the terminals on the unit.
Match “+” to “+” and “-” to “-.” If the
batteries are not fully inserted, the
unit cannot receive battery power.
NOTE: The unit may beep briefly
when you install the batteries. This
is normal. The GREEN Light flashes
about every 60 seconds when the
unit is receiving battery power.
The battery door will resist closing unless batteries are installed.
This warns you the unit will not operate without batteries.
9. Attach the Smoke/CO Alarm to the mounting
bracket. Line up the guides on the alarm’s
base with the guides on the mounting bracket.
When guides are lined up, turn the base
clockwise (right) until it snaps into place.
NOTE: Once the Smoke/CO Alarm is snapped
onto the mounting bracket, you can rotate the
Smoke/CO Alarm to adjust the alignment.
10. Test the Smoke/CO Alarm. See
“Weekly Testing” for details.
OTHER Z-WAVE SYSTEMS
This product can be operated in any Z-Wave network with other Z-Wave certified devices
from other manufacturers. All non-battery operated nodes within the network will act
as repeaters regardless of the vendor to increase the reliability of the network.
ADD
1. Slide battery door open.
2. Insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
REMOVE
1. Slide battery door open.
2. Remove and re-insert batteries checking the correct orientation.
3. Press and hold the test button with your finger or thumb. Keep it held down as
you slide the battery drawer closed. You may then release the button.
NOTE: Use only your finger or thumb on the test button. The use of any other
instrument is strictly prohibited.
• The alarm will remain awake for 30 seconds on inclusion.
RESET DEVICE
If the device is powered up with the test button held down for 10+ seconds, the device will reset all
Z-Wave settings and leave the network.
Upon completion of the Reset operation, the LED will glow and the horn will sound for ~1 second.
Please use this procedure only when the network primary controller is missing or
otherwise inoperable.
NOTE: The device will not remain awake after resetting and will go into standby mode.
PROCEDURE TO MANUALLY WAKE-UP THE DEVICE
To manual wake-up the device, slide the battery door open wait for ~5 seconds and then slide
the battery drawer closed. Upon power-up, the device will send the wake-up notification.
DSK LOCATION ON THE PRODUCT
The QR code and the 5-digit DSK pin can be found on the product nameplate which is located on
the back of the product. The Full DSK string can be found on the product insert, available inside the
product packaging.
For more information on Z-Wave specifications, visit www.firstalert.com/zwaveinfo.
REGULAR MAINTENANCE
This unit has been designed to be as maintenance-free as possible, but there
are a few simple things you must do to keep it working properly.
• Test it at least once a week.
• Clean the Smoke/CO Alarm at least once a month; gently vacuum the outside of the Smoke/CO
Alarm using your household vacuum’s soft brush attachment. A can of clean compressed air (sold
at computer or office supply stores) may also be used. Follow manufacturer instructions for use.
Test the Smoke/CO Alarm. Never use water, cleaners or solvents since they may damage the unit.
• If the Smoke/CO Alarm becomes contaminated by excessive dirt, dust and/or grime,
and cannot be cleaned to avoid unwanted alarms, replace the unit immediately.
• Relocate the unit if it sounds frequent unwanted alarms. See
“Where This Alarm Should Not Be Installed” for details.
Choosing a replacement battery:
Your Smoke/CO Alarm requires two standard AA batteries. The following batteries are acceptable as
replacements: Energizer E91, Duracell MN1500/LR6. These batteries are available at many local
retail stores.
• Always use the exact batteries specified by this User’s Manual. DO NOT use
rechargeable batteries. Clean the battery contacts and also those of the device prior
to battery installation. Install batteries correctly with regard to polarity (+ and -).
• Please dispose of or recycle used batteries properly, following any local
regulations. Consult your local waste management authority or recycling
organization to find an electronics recycling facility in your area. DO NOT
DISPOSE OF BATTERIES IN FIRE. BATTERIES MAY EXPLODE OR LEAK.
• Constant exposure to high or low temperatures or high humidity may reduce battery life.
• Keep battery out of reach of children. In the event a battery is swallowed,
immediately contact your poison control center, your physician, or the National
Battery Ingestion hotline at 202-625-3333 as serious injury may occur.
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Actual battery service life depends on the Smoke/CO Alarm and the environment in which
it is installed. All the batteries specified above are acceptable replacement batteries for
this unit. Regardless of the manufacturer’s suggested battery life, you MUST replace
the battery immediately once the unit starts “chirping” (the “low battery warning”).
To replace the batteries (without removing
Alarm from the ceiling or wall):
1. Open the battery compartment.
2. Press tabs A and B as shown in the
diagram and remove each battery.
3. Insert the new batteries, making sure they
snap completely into the battery compartment.
Match the terminals on the ends of the
batteries with the terminals on the unit.
4. Close the battery compartment, and then test
the unit by pressing the Test/Silence button.
AB
IF YOUR SMOKE/CO ALARM SOUNDS
WHAT TO DO FIRST–IDENTIFY THE TYPE OF ALARM
Type of Alarm What You See and Hear
Carbon Monoxide (CO)
CO LED: Flashes Red
Horn: 4 beeps, pause, 4 beeps, pause
Power/Smoke LED: Off
Smoke
Power/Smoke LED: Flashes Red
Horn: 3 beeps, pause, 3 beeps, pause
CO LED: Off
IF THE CO ALARM SOUNDS
“ALARM-MOVE TO FRESH AIR”
If you hear the CO alarm horn and the CO red light is flashing, move
everyone to a source of fresh air. DO NOT remove the batteries!
Actuation of your CO Alarm indicates the presence of carbon monoxide (CO) which
can kill you. In other words, when your CO Alarm sounds, you must not ignore it!
IF THE CO ALARM SIGNAL SOUNDS:
1. Operate the Test/Silence button.
2. Call your emergency services, fire department or 911. Write down
the number of your local emergency service here:
__________________________________________________________________
3. Immediately move to fresh air—outdoors or by an open door or window. Do a head count
to check that all persons are accounted for. Do not re-enter the premises, or move away
from the open door or window until the emergency services responder has arrived, the
premises have been aired out, and your CO Alarm remains in its normal condition.
4. After following steps 1-3, if your CO Alarm reactivates within a 24-hour period, repeat steps
1-3 and call a qualified appliance technician to investigate for sources of CO from fuel-burning
equipment and appliances, and inspect for proper operation of this equipment. If problems are
identified during this inspection have the equipment serviced immediately. Note any combustion
equipment not inspected by the technician, and consult the manufacturers’ instructions, or
contact the manufacturers directly, for more information about CO safety and this equipment.
Make sure that motor vehicles are not, and have not, been operating in an attached garage or
adjacent to the residence. Write down the number of a qualified appliance technician here:
__________________________________________________________________
NOTE: A qualified appliance technician is defined as “a person, firm, corporation, or company that
either in person or through a representative, is engaged in and responsible for the installation, testing,
servicing, or replacement of heating, ventilation, air conditioning (HVAC) equipment, combustion
appliances and equipment, and/or gas fireplaces or other decorative combustion equipment.”
IF THE SMOKE ALARM SOUNDS
RESPONDING TO AN ALARM
• If the unit alarms and you are not testing the unit, it is warning you of a
potentially dangerous situation that requires your immediate attention. NEVER
ignore any alarm. Ignoring the alarm may result in injury or death.
• Never remove the batteries from a battery operated Smoke/CO Alarm to stop an
unwanted alarm (caused by cooking smoke, etc.). Removing batteries disables
the alarm so it cannot sense smoke, and removes your protection. Instead open a
window or fan the smoke away from the unit. The alarm will reset automatically.
• If the unit alarms get everyone out of the house immediately.
WHAT TO DO IN CASE OF FIRE
Don’t panic; stay calm. Follow your family escape plan.
Get out of the house as quickly as possible. Don’t stop to get dressed or collect anything.
Feel doors with the back of your hand before opening them. If a door is cool, open it slowly.
Don’t open a hot door. Keep doors and windows closed, unless you must escape through them.
Cover your nose and mouth with a cloth (preferably damp). Take short, shallow breaths.
Meet at your planned meeting place outside your home, and do a
head count to make sure everybody got out safely.
Call the Fire Department as soon as possible from outside. Give your address, then your name.
Never go back inside a burning building for any reason.
Contact your Fire Department for ideas on making your home safer.
Alarms have various limitations. See “General Limitations of Smoke/CO Alarms” for details.
USING THE SILENCE FEATURES
Never remove the batteries to quiet an unwanted alarm. Removing the
batteries disables the alarm and removes your protection.
The Silence Feature is intended to temporarily silence the horn while you
identify and correct the problem. Do not use the Silence Feature in emergency
situations. It will not correct a CO problem or extinguish a fire.
The Silence Feature can temporarily quiet an unwanted alarm for several minutes.
Press the Test/Silence button on the alarm cover for at least 3-5 seconds.
After the Test/Silence button is released, the Red LED blinks during the silence mode.
When the Smoke Alarm is Silenced When the CO Alarm is Silenced
The Smoke Alarm will remain silent for up to
15 minutes, then return to normal operation.
If the smoke has not cleared–or continues to
increase–the device will go back into alarm.
The CO alarm will remain silent
for up to 4 minutes.
After 4 minutes, if CO levels remain potentially
dangerous the horn will start sounding again.
SILENCING THE LOW BATTERY WARNING
This silence feature can temporarily quiet the low battery warning “chirp” for
up to 8 hours. Press the Test/Silence button on the alarm cover.
Once the low battery warning “chirp” silence feature is activated, the unit continues to flash the
Green light once a minute for 8 hours. After 8 hours, the low battery “chirp” will resume. Replace
the batteries as soon as possible; this unit will not operate without battery power!
To deactivate this feature: Press the Test/Silence button again. The unit will go into Test Mode
and the low battery warning will resume (LED flashes and unit sounds “chirp” once a minute).
SILENCING THE END OF LIFE SIGNAL
This silence feature can temporarily quiet the End of Life warning “chirp” for up to 2 days.
You can silence the End of Life warning “chirp” by pressing the Test/Silence button. The
horn will chirp, acknowledging that the End of Life silence feature has been activated.
After approximately 2 days, the End of Life “chirp” will resume.
WHAT YOU NEED TO KNOW ABOUT CO
WHAT IS CO?
CO is an invisible, odorless, tasteless gas produced when fossil fuels do not burn completely,
or are exposed to heat (usually fire). Electrical appliances typically do not produce CO.
These fuels include: Wood, coal, charcoal, oil, natural gas, gasoline, kerosene, and propane.
Common appliances are often sources of CO. If they are not properly maintained,
are improperly ventilated, or malfunction, CO levels can rise quickly. CO is a real
danger now that homes are more energy efficient. “Air-tight” homes with added
insulation, sealed windows, and other weatherproofing can “trap” CO inside.
SYMPTOMS OF CO POISONING
These symptoms are related to CO POISONING and should
be discussed with ALL household members.
Mild Exposure: Slight headache, nausea, vomiting, fatigue (“flu-like” symptoms).
Medium Exposure: Throbbing headache, drowsiness, confusion, fast heart rate.
Extreme Exposure: Convulsions, unconsciousness, heart and lung failure.
Exposure to Carbon Monoxide can cause brain damage, death.
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This CO Alarm measures exposure to CO over time. It alarms if CO levels are extremely
high in a short period of time, or if CO levels reach a certain minimum over a long period of
time. The CO Alarm generally sounds an alarm before the onset of symptoms in average,
healthy adults. Why is this important? Because you need to be warned of a potential CO
problem while you can still react in time. In many reported cases of CO exposure, victims
may be aware that they are not feeling well, but become disoriented and can no longer
react well enough to exit the building or get help. Also, young children and pets may be the
first affected. The average healthy adult might not feel any symptoms when the CO Alarm
sounds. However, people with cardiac or respiratory problems, infants, unborn babies,
pregnant mothers, or elderly people can be more quickly and severely affected by CO. If
you experience even mild symptoms of CO poisoning, consult your doctor immediately!
FINDING THE SOURCE OF CO AFTER AN ALARM
Carbon monoxide is an odorless, invisible gas, which often makes it difficult to locate the source of
CO after an alarm. These are a few of the factors that can make it difficult to locate sources of CO:
• House well ventilated before the investigator arrives.
• Problem caused by “backdrafting.”
• Transient CO problem caused by special circumstances.
Because CO may dissipate by the time an investigator arrives, it may be
difficult to locate the source of CO. BRK Brands, Inc. shall not be obligated
to pay for any carbon monoxide investigation or service call.
POTENTIAL SOURCES OF CO IN THE HOME
Fuel-burning appliances like: portable
heater, gas or wood burning fireplace, gas
kitchen range or cooktop, gas clothes dryer.
Damaged or insufficient venting:
corroded or disconnected water heater
vent pipe, leaking chimney pipe or flue,
or cracked heat exchanger, blocked
or clogged chimney opening.
Improper use of appliance/
device: operating a barbecue grill
or vehicle in an enclosed area (like
a garage or screened porch).
Transient CO Problems: “transient”
or on-again-off-again CO problems
can be caused by outdoor conditions
and other special circumstances.
The following conditions can result in transient CO situations:
1. Excessive spillage or reverse venting of fuel appliances caused by outdoor conditions such as:
• Wind direction and/or velocity, including high, gusty winds. Heavy air in the
vent pipes (cold/humid air with extended periods between cycles).
• Negative pressure differential resulting from the use of exhaust fans.
• Several appliances running at the same time competing for limited fresh air.
• Vent pipe connections vibrating loose from clothes dryers, furnaces, or water heaters.
• Obstructions in or unconventional vent pipe designs which can amplify the above situations.
2. Extended operation of unvented fuel burning devices (range, oven, fireplace).
3. Temperature inversions, which can trap exhaust close to the ground.
4. Car idling in an open or closed attached garage, or near a home.
These conditions are dangerous because they can trap exhaust in your home. Since these
conditions can come and go, they are also hard to recreate during a CO investigation.
HOW CAN I PROTECT MY FAMILY
FROM CO POISONING?
A CO Alarm is an excellent means of protection. It monitors the air and sounds a loud
alarm before Carbon Monoxide levels become threatening for average, healthy adults.
A CO Alarm is not a substitute for proper maintenance of home appliances.
To help prevent CO problems and reduce the risk of CO poisoning:
• Clean chimneys and flues yearly. Keep them free of debris, leaves, and nests for
proper air flow. Also, have a professional check for rust and corrosion, cracks,
or separations. These conditions can prevent proper air movement and cause
backdrafting. Never “cap” or cover a chimney in any way that would block air flow.
• Test and maintain all fuel-burning equipment annually. Many local gas or oil
companies and HVAC companies offer appliance inspections for a nominal fee.
• Make regular visual inspections of all fuel-burning appliances. Check appliances for
excessive rust and scaling. Also check the flame on the burner and pilot lights. The
flame should be blue. A yellow flame means fuel is not being burned completely and CO
may be present. Keep the blower door on the furnace closed. Use vents or fans when
they are available on all fuel-burning appliances. Make sure appliances are vented to
the outside. Do not grill or barbecue indoors, or in garages or on screen porches.
• Check for exhaust backflow from CO sources. Check the draft hood on an operating
furnace for a backdraft. Look for cracks on furnace heat exchangers.
• Check the house or garage on the other side of shared wall.
• Keep windows and doors open slightly. If you suspect that CO is escaping into your home,
open a window or a door. Opening windows and doors can significantly decrease CO levels.
In addition, familiarize yourself with all enclosed materials. Read this manual in its
entirety, and make sure you understand what to do if your CO Alarm sounds.
REGULATORY INFORMATION FOR SMOKE/CO ALARMS
REGULATORY INFORMATION FOR CO ALARMS
WHAT LEVELS OF CO CAUSE AN ALARM?
Underwriters Laboratories Inc. Standard UL2034 requires residential CO Alarms
to sound when exposed to levels of CO and exposure times as described below.
They are measured in parts per million (ppm) of CO over time (in minutes).
UL2034 Required Alarm Points*:
• If the alarm is exposed to 400 ppm of CO, IT MUST ALARM BETWEEN 4 and 15 MINUTES.
• If the alarm is exposed to 150 ppm of CO, IT MUST ALARM BETWEEN 10 and 50 MINUTES.
• If the alarm is exposed to 70 ppm if CO, IT MUST ALARM BETWEEN 60 and 240 MINUTES.
*Approximately 10% COHb exposure at levels of 10% to 95% Relative Humidity (RH).
The unit is designed not to alarm when exposed to a constant level of 30 ppm for 30 days.
Da
CO Alarms are designed to alarm before there is an immediate life threat.
Since you cannot see or smell CO, never assume it’s not present.
• An exposure to 100 ppm of CO for 20 minutes may not affect average, healthy
adults, but after 4 hours the same level may cause headaches.
• An exposure to 400 ppm of CO may cause headaches in average, healthy
adults after 35 minutes, but can cause death after 2 hours.
Standards: Underwriters Laboratories Inc. Single and Multiple
Station carbon monoxide alarms UL2034.
According to Underwriters Laboratories Inc. UL2034, Section 1-1.2: “Carbon monoxide alarms
covered by these requirements are intended to respond to the presence of carbon monoxide from
sources such as, but not limited to, exhaust from internal-combustion engines, abnormal operation
of fuel-fired appliances, and fireplaces. CO Alarms are intended to alarm at carbon monoxide
levels below those that could cause a loss of ability to react to the dangers of Carbon Monoxide
exposure.” This CO Alarm monitors the air at the Alarm, and is designed to alarm before CO levels
become life threatening. This allows you precious time to leave the house and correct the problem.
This is only possible if Alarms are located, installed, and maintained as described in this manual.
Gas Detection at Typical Temperature and Humidity Ranges: The CO Alarm is not formulated
to detect CO levels below 30 ppm typically. UL tested for false alarm resistance to Methane (500
ppm), Butane (300 ppm), Heptane (500 ppm), Ethyl Acetate (200 ppm), Isopropyl Alcohol (200 ppm)
and Carbon Dioxide (5000 ppm). Values measure gas and vapor concentrations in parts per million.
Audible Alarm: 85 dB minimum at 10 feet (3 meters).
Printed in Mexico M08-0456-169793_1044807 K1 02/20
REGULATORY INFORMATION FOR SMOKE ALARMS
RECOMMENDED LOCATIONS FOR SMOKE ALARMS
Installing Smoke Alarms in Single-Family Residences
The National Fire Protection Association (NFPA), recommends one Smoke Alarm on every floor,
in every sleeping area, and in every bedroom. In new construction, the Smoke Alarms must be
AC powered and interconnected. See “Agency Placement Recommendations” for details.
For additional coverage, it is recommended that you install a Smoke Alarm in all
rooms, halls, storage areas, finished attics, and basements, where temperatures
normally remain between 40˚ F (4.4˚ C) and 100˚ F (37.8˚ C). Make sure no door or
other obstruction could keep smoke from reaching the Smoke Alarms.
More specifically, install Smoke Alarms:
• On every level of your home, including finished attics and basements.
• Inside every bedroom, especially if people sleep with the door partly or completely closed.
• In the hall near every sleeping area. If your home has multiple sleeping areas, install a
unit in each. If a hall is more than 40 feet long (12 meters), install a unit at each end.
• At the top of the first-to-second floor stairway, and at the bottom of the basement stairway.
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Specific requirements for Smoke Alarm installation vary from state to state and from region to region.
Check with your local Fire Department for current requirements in your area. It is recommended AC
or AC/DC units be interconnected for added protection.
AGENCY PLACEMENT RECOMMENDATIONS
Standards: Underwriters Laboratories Inc. Single and Multiple Station Smoke Alarms 217.
NFPA 72 Chapter 29
“For your information, the National Fire Alarm and Signaling Code, NFPA 72, reads as follows:”
29.5.1* Required Detection.
29.5.1.1* Where required by other governing laws, codes, or standards for a specific type of
occupancy, approved single and multiple-station smoke alarms shall be installed as follows:
(1) *In all sleeping rooms and guest rooms
(2) *Outside of each separate dwelling unit sleeping area, within 21 ft (6.4 m) of any
door to a sleeping room, with the distance measured along a path of travel
(3) On every level of a dwelling unit, including basements
(4) On every level of a residential board and care occupancy (small facility),
including basements and excluding crawl spaces and unfinished attics
(5) *In the living area(s) of a guest suite
(6) In the living area(s) of a residential board and care occupancy (small facility)
(Reprinted with permission from NFPA 72®, National Fire Alarm and Signaling Code Copyright © 2010
National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the complete
and official position of the National Fire Protection Association, on the referenced subject which is
represented only by the standard in its entirety), (National Fire Alarm and Signaling Code®and NFPA
72®are registered trademarks of the National Fire Protection Association, Inc., Quincy, MA 02269).
California State Fire Marshal (CSFM)
Early warning detection is best achieved by the installation of fire detection equipment
in all rooms and areas of the household as follows: A Smoke Alarm installed in each
separate sleeping area (in the vicinity, but outside bedrooms), and Heat or Smoke Alarms
in the living rooms, dining rooms, bedrooms, kitchens, hallways, finished attics, furnace
rooms, closets, utility and storage rooms, basements, and attached garages.
ABOUT SMOKE ALARMS
Battery (DC) operated Smoke Alarms: Provide protection even when
electricity fails, provided the batteries are fresh and correctly installed. Units
are easy to install, and do not require professional installation.
AC powered Smoke Alarms: Can be interconnected so if one unit senses smoke,
all units alarm. They do not operate if electricity fails. AC with battery (DC) back-
up: will operate if electricity fails, provided the batteries are fresh and correctly
installed. AC and AC/DC units must be installed by a qualified electrician.
Smoke/CO Alarms for Solar or Wind Energy users and battery backup power systems:
AC powered Smoke/CO Alarms should only be operated with true or pure sine wave inverters.
Operating this Alarm with most battery-powered UPS (uninterruptible power supply) products
or square wave or “quasi sine wave” inverters will damage the Alarm. If you are not sure
about your inverter or UPS type, please consult with the manufacturer to verify.
Smoke Alarms for the hearing impaired: Special purpose Smoke Alarms should
be installed for the hearing impaired. They include a visual alarm and an audible
alarm horn, and meet the requirements of the Americans With Disabilities Act.
Can be interconnected so if one unit senses smoke, all units alarm.
ABOUT SMOKE ALARMS (CONTINUED)...
Smoke alarms are not to be used with detector guards unless the
combination has been evaluated and found suitable for that purpose.
All these Smoke Alarms are designed to provide early warning of fires if located, installed and
cared for as described in the user’s manual, and if smoke reaches the Alarm. If you are unsure
which type of Smoke Alarm to install, refer the National Fire Protection Association (NFPA)
Standard 72 (National Fire Alarm and Signaling Code) and NFPA 101 (Life Safety Code). National
Fire Protection Association, One Batterymarch Park, Quincy, MA 02269-9101. Local building
codes may also require specific units in new construction or in different areas of the home.
SPECIAL COMPLIANCE CONSIDERATIONS
This Smoke Alarm is suitable for use in apartments, condominiums, townhouses, hospitals, day
care facilities, health care facilities, boarding houses, group homes and dormitories provided
a primary fire detection system already exists to meet fire detection requirements in common
areas like lobbies, hallways, or porches. Using this Smoke Alarm in common areas may not
provide sufficient warning to all residents or meet local fire protection ordinances/regulations.
This Smoke Alarm alone is not a suitable substitute for complete fire detection systems
in places housing many people—like apartment buildings, condominiums, hotels, motels,
dormitories, hospitals, health care facilities, nursing homes, day care facilities, or group homes
of any kind. It is not a suitable substitute for complete fire detection systems in warehouses,
industrial facilities, commercial buildings, and special-purpose non-residential buildings which
require special fire detection and alarm systems. Depending on the building codes in your
area, this Smoke Alarm may be used to provide additional protection in these facilities.
In new construction, most building codes require the use of AC or AC/DC powered Smoke
Alarms only. In existing construction, AC, AC/DC, or DC powered Smoke Alarms can be used
as specified by local building codes. Refer to NFPA 72 (National Fire Alarm and Signaling
Code) and NFPA 101 (Life Safety Code), local building codes, or consult your Fire Department
for detailed fire protection requirements in buildings not defined as “households”.
HUD MAP PROGRAM
Certain HUD battery powered Smoke Alarm applications, especially those that fall under
HUD 223(f) MAP (Multi-family Accelerated Processing), may require a 10 Year sealed tamper
resistant battery. This alarm does not meet that requirement. Substitute First Alert SA340B.
GENERAL LIMITATIONS OF SMOKE/CO ALARMS
This Smoke/CO Alarm is intended for residential use. It is not intended for use in industrial
applications where Occupational Safety and Health Administration (OSHA) requirements for
Carbon Monoxide Alarms must be met. The Smoke Alarm portion of this device is not intended
to alert hearing impaired residents. Special purpose Smoke Alarms should be installed for
hearing impaired residents (CO Alarms are not yet available for the hearing impaired).
Smoke/CO Alarms may not waken all individuals. Practice the escape plan at least twice a year,
making sure that everyone is involved – from kids to grand- parents. Allow children to master fire
escape planning and practice before holding a fire drill at night when they are sleeping. If children
or others do not readily waken to the sound of the Smoke/CO Alarm, or if there are infants or
family members with mobility limitations, make sure that someone is assigned to assist them in
fire drill and in the event of an emergency. It is recommended that you hold a fire drill while family
members are sleeping in order to determine their response to the sound of the Smoke/CO Alarm
while sleeping and to determine whether they may need assistance in the event of an emergency.
Smoke/CO Alarms cannot work without power. Battery operated units cannot work if the batteries
are missing, disconnected or dead, if the wrong type of batteries are used, or if the batteries are not
installed correctly. AC units cannot work if the AC power is cut off for any reason (open fuse or circuit
breaker, failure along a power line or at a power station, electrical fire that burns the electrical wires,
etc.). If you are concerned about the limitations of battery or AC power, install both types of units.
This Smoke/CO Alarm will not sense smoke or CO that does not reach the sensors. It will
only sense smoke or CO at the sensor. Smoke or CO may be present in other areas. Doors or other
obstructions may affect the rate at which CO or smoke reaches the sensors. If bedroom doors are
usually closed at night, we recommend you install an alarm device (Combination CO and Smoke
Alarm, or separate CO Alarms and Smoke Alarms) in each bedroom and in the hallway between them.
This Smoke/CO Alarm may not sense smoke or CO on another level of the home. Example:
This alarm device, installed on the second floor, may not sense smoke or CO in the basement.
For this reason, one alarm device may not give adequate early warning. Recommended minimum
protection is one alarm device in every sleeping area, every bedroom, and on every level of your
home. Some experts recommend battery powered Smoke and CO Alarms be used in conjunction
with interconnected AC powered Smoke Alarms. For details, see “About Smoke Alarms” for details.
Smoke/CO Alarms may not be heard. The alarm horn loudness meets or exceeds current
UL standards of 85 dB at 10 feet (3 meters). However, if the Smoke/CO Alarm is installed
outside the bedroom, it may not wake up a sound sleeper or one who has recently used
drugs or has been drinking alcoholic beverages. This is especially true if the door is closed
or only partly open. Even persons who are awake may not hear the alarm horn if the sound
is blocked by distance or closed doors. Noise from traffic, stereo, radio, television, air
conditioner, or other appliances may also prevent alert persons from hearing the alarm
horn. This Smoke/CO Alarm is not intended for people who are hearing impaired.
The Alarm may not have time to alarm before the fire itself causes damage,
injury, or death, since smoke from some fires may not reach the unit
immediately. Examples of this include persons smoking in bed, children playing with
matches, or fires caused by violent explosions resulting from escaping gas.
This Smoke/CO Alarm is not a substitute for life insurance. Though this Smoke/CO Alarm
warns against increasing CO levels or the presence of smoke, BRK Brands, Inc. does not warrant or
imply in any way that they will protect lives. Homeowners and renters must still insure their lives.
This Smoke/CO Alarm has a limited life. Although this Smoke/CO Alarm and all
of its parts have passed many stringent tests and are designed to be as reliable as
possible, any of these parts could fail at any time. Therefore, you must test this device
weekly. The unit should be replaced immediately if it is not operating properly.
This Smoke/CO Alarm is not foolproof. Like all other electronic devices, this Smoke/CO Alarm
has limitations. It can only detect smoke or CO that reaches the sensors. It may not give early
warning of the source of smoke or CO is in a remote part of the home, away from the alarm device.
Z-Wave Mesh Network Limitations 1. Alarms are single stationed Alarms and are
not interconnected to each other. 2. Only initiating Alarms will sound. 3. Z-Wave
system is not listed as a life safety system. Mesh network system only provides
supplemental notifications and should not be counted on for life safety.
TROUBLESHOOTING GUIDE
IF THE ALARM... PROBLEM... YOU SHOULD...
Horn “chirps” and LED flashes GREEN about once per minute. Low battery warning. Install two new AA batteries*.
Horn “chirps” 3 times every minute; LED
flashes GREEN 3 rapid flashes.
MALFUNCTION SIGNAL. Device is not working
properly, and needs to be replaced.
Units under warranty should be returned to manufacturer
for replacement. See “Limited Warranty” for details.
Horn “chirps” 5 times every minute; LED
flashes GREEN 5 rapid flashes. END OF LIFE SIGNAL. Alarm needs to be replaced. Immediately replace the Alarm.
Carbon Monoxide Alarm ONLY:
CO Alarm goes back into alarm 4 minutes after you Silence it. CO levels indicate a potentially dangerous situation.
IF YOU ARE FEELING SYMPTOMS OF CO POISONING,
EVACUATE your home and call 911 or the Fire Department.
Refer to “If The CO Alarm Sounds” for details.
CO Alarm sounds frequently even though no high
levels of CO are revealed in an investigation.
The CO Alarm may be improperly located. Refer
to “Where to Install This Alarm” for details.
Relocate your Alarm. If frequent alarms continue, have
home rechecked for potential CO problems. You may
be experiencing an intermittent CO problem.
Smoke Alarm ONLY:
Smoke Alarm sounds when no smoke is visible. Unwanted alarm may be caused by non-
emergency source like cooking smoke.
Silence Alarm using manual button; clean the Alarm’s
cover with a soft, clean cloth. If frequent unwanted alarms
continue, relocate your Alarm. Alarm may be too close to
a kitchen, cooking appliance, or steamy bathroom.
*For a list of acceptable replacement batteries, see “Regular Maintenance.”
If you have any questions that cannot be answered by reading this manual, call the Customer Service Team: 1-800-323-9005.
LIMITED WARRANTY
BRK Brands, Inc., (“BRK”) the maker of First Alert®brand and BRK®brand products, warrants that for a period of ten years from the date of purchase, this product will be free from defects in
material and workmanship. BRK, at its option, will repair or replace this product or any component of the product found to be defective during the warranty period. Replacement will be made with a
new or remanufactured product or component. If the product is no longer available, replacement may be made with a similar product of equal or greater value. This is your exclusive warranty.
This warranty is valid for the original retail purchaser from the date of initial retail purchase and is not transferable. Keep the original sales receipt. Proof of purchase is required to obtain warranty
performance. BRK dealers, service centers, or retail stores selling BRK products do not have the right to alter, modify or any way change the terms and conditions of this warranty.
This warranty does not cover normal wear of parts or damage resulting from any of the following: negligent use or misuse of the product, use on improper
voltage or current, use contrary to the operating instructions, disassembly, repair or alteration by anyone other than BRK or an authorized service center. Further,
the warranty does not cover Acts of God, such as fire, flood, hurricanes and tornadoes or any batteries that are included with this unit.
BRK shall not be liable for any incidental or consequential damages caused by the breach of any express or implied warranty. Except to the extent prohibited by applicable law,
any implied warranty of merchantability or fitness for a particular purpose is limited in duration to the duration of the above warranty. Some states, provinces or jurisdictions
do not allow the exclusion or limitation of incidental or consequential damages or limitations on how long an implied warranty lasts, so the above limitations or exclusion
may not apply to you. This warranty gives you specific legal rights, and you may also have other rights that vary from state to state or province to province.
How to Obtain Warranty Service
Service: If service is required, do not return the product to your retailer. In order to obtain warranty service, contact the Customer Service Team at
1-800-323-9005. To assist us in serving you, please have the model number and date of purchase available when calling.
For Warranty Service return to: 1301 Joe Battle, El Paso, TX 79936
Battery: BRK Brands, Inc. make no warranty, express or implied, written or oral, including that of merchantability or fitness for any particular purpose with respect to battery.
Visit www.firstalert.com for more information.
For your records, please record:
Date Purchased: ______________/_________________Month/Year
Where Purchased: ____________________________________________
Date Installed: ____________/____________Month/Year
Replace alarm 7 years after installation. Please write the date in the
space provided: __________/__________ Month/Year
The alarm will also provide an audible End-of-Life Signal approximately
7 years after installation to remind you to replace the unit.
The End-of-Life Signal can be silenced for up to 2 days. Do not unplug
the alarm or remove the batteries until you get replacement.
A copy of the manual can be found at www.firstalert.com/products.