Kidde 3050-VDSC10 User manual

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TRUSENSE SMOKE/CO COMBO
User Guide
Combination Multi-Criteria Optical Sensor Smoke & Carbon Monoxide Alarm
with Voice
Model 3050-VDSC10
10YEAR SEALED LITHIUM
BATTERY
VOICE ALARM
COMBINATION ALARM
P/N: 2575-7201-01 Rev B
Helps Reduce Cooking
Nuisance Alarms
UL 217 8th Ed.
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Advanced Smoke Detection Technology
SENSE
10 YEAR SMOKE AND
CARBON MONOXIDE ALARM

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Thank You for Purchasing this Kidde Alarm
This model is powered by a non-replaceable, long life sealed lithium battery system. It also contains a voice
message system and SMART HUSH® Control to temporarily silence nuisance alarms.
Teach children how to respond to the alarm and that they should never play with the unit. This alarm is a
multi-criteria device designed to detect both smoke and carbon monoxide from any source of combustion in a
residential environment. It is not designed for use in a recreational vehicle (RV) or boat.
NOTE: Please thoroughly read this user guide and save the document for future reference and to pass on
to any subsequent owner.
The National Fire Protection Association (NFPA) and the manufacturer recommend replacing this alarm ten
years from the date code on back of alarm.
Date Code (on back): ___________________
Date of Purchase: ___________________
Where Purchased: ___________________
Date to Replace: ___________________
Product Support: 1-800-880-6788
Please write down the below information
and have this at hand when you call.

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Contents
1. Smoke Alarm: What To Do When The Alarm Sounds . . . . . . . . . . . . 4
2. Carbon Monoxide Alarm: What To Do When The Alarm Sounds . . . . . . . . 5
3. Other Alarm Visual And Audible Indicators . . . . . . . . . . . . . . . 6
4. Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . 7
5. Introduction, Product Features And Specifications . . . . . . . . . . . . . 8
6. Limitations Of Smoke And Carbon Monoxide Alarms . . . . . . . . . . . . 9
7. Recommended Locations For Smoke And Carbon Monoxide Alarms . . . . . . 11
8. Locations To Avoid. . . . . . . . . . . . . . . . . . . . . . . . . 14
9. Installation And Activation . . . . . . . . . . . . . . . . . . . . . 15
10. Operation And Testing . . . . . . . . . . . . . . . . . . . . . . . 16
11. Recognizing Nuisance Alarms . . . . . . . . . . . . . . . . . . . . 17
12. Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
13. Permanently Disable Alarm / Discharge Battery . . . . . . . . . . . . . 19
14. General Carbon Monoxide (CO) Information . . . . . . . . . . . . . . 20
15. Cleaning Your Alarm. . . . . . . . . . . . . . . . . . . . . . . . 22
16. Good Safety Habits . . . . . . . . . . . . . . . . . . . . . . . . 23
17. Service And Warranty . . . . . . . . . . . . . . . . . . . . . . . 26

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1. Smoke Alarm: What To Do When The Alarm Sounds
The smoke alarm pattern is three long beeps with voice “Fire!,” a 1.5 second pause, and three long beeps repeating.
The red LED blinks in time with the alarm pattern.
The smoke alarm takes precedence when both smoke and carbon monoxide are present.
•Alert small children in the home as well as anyone else that might have difficulty recognizing the impor-
tance of the alarm sounding or that might have difficulty leaving the area without help.
•Leave immediately by your escape plan. Every second counts, so don’t waste time getting dressed or
picking up valuables.
•While leaving, don’t open any inside door without first feeling its surface. If hot, or if you see smoke seeping
through cracks, don’t open that door! Instead, use your alternate exit. If the inside of the door is cool, place
your shoulder against it, open it slightly and be ready to slam it shut if heat and smoke rush in.
•If the escape route requires you to go through smoke, stay close to the floor where the air is cleaner.
Crawl if necessary, and breathe shallowly through a cloth, wet if possible.
•Once outside, go to your selected meeting place and make sure everyone is there.
•Call the fire department or 911 from your cell phone outside, or from your neighbor’s home-not from yours!
•Don’t return to your home until the fire officials say that it is all right to do so.
NOTE: See Section RECOGNIZING NUISANCE ALARMS, for nuisance alarm situations.

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2. Carbon Monoxide Alarm: What To Do When The Alarm Sounds
The carbon monoxide (CO) alarm pattern is four quick beeps with voice “Warning! Carbon Monoxide”
repeating every 5 seconds. The red LED blinks in time with the alarm pattern. After 4 minutes in CO alarm
the alarm pattern and voice will only occur every 60s.
WARNING: ACTUATION OF YOUR CO ALARM INDICATES THE PRESENCE OF CARBON
MONOXIDE CO WHICH CAN KILL YOU. IF ALARM SIGNAL SOUNDS:
1 Operate the Test/Hush® button. NOTE: Pressing the button on the alarming unit will silence the
alarm notification. If the unit goes into alarm mode again within six minutes, it is sensing high levels of
CO which can quickly become a dangerous situation.
2 Call your emergency services (Fire Department or 911). EMERGENCY PHONE #:___________
3 Immediately move to fresh air —outdoors or by an open door /window. Do a head count to check
that all persons are accounted for. Alert small children in the home as well as anyone else that might
have difficulty recognizing the importance of the alarm sounding or that might have difficulty leaving
the area without help. Do not reenter the premises or move away from the open door/window until the
emergency services responders have arrived, the premises have been aired out, and your alarm remains
in its normal condition.
4 After following steps 1-3, if the alarm reactivates within a 24 hour period, repeat steps 1-3 and call a
qualified appliance technician to investigate sources of CO from fuel burning equipment and appliances,
and to inspect for proper operation of 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 manufacturer’s instructions,
or contact the manufacturer directly for more information about CO safety and the equipment. Make
sure that motor vehicles are not, or have not been, operating in a garage attached or adjacent to the
residence. Never restart the source of a CO problem until it has been corrected. Never ignore the sound
of the alarm!
NOTE: See Section RECOGNIZING NUISANCE ALARMS, for nuisance alarm situations.

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3. Other Alarm Visual and Audible Indicators
Operational Mode Visual Indications Audible Indications Action/Note
Normal (standby) Green LED blink approx
every 60 sec.
Test (button press
when no alarm condi-
tion is present)
(Note: Test is very
loud, stand a few feet
away.)
Red LED blinks in time
with alarm pattern.
• Single beep.
•3 long beeps, voice "Fire!", 3 long
beeps, 4 quick beeps, Voice
"Warning, Carbon Monoxide," 4
quick beeps,
Perform button press once
a week to verify proper
alarm operation.
Smoke or CO Alarm
Memory (unit has
experienced a smoke
or CO alarm event, or
has detected 100ppm
CO or greater.)
Red LED blink every
16 sec.
After button push, voice “Smoke
previously detected" or "Carbon
Monoxide previously detected.”
NOTE: Alarm memory is
only retained for 24 hrs.
Push button to clear Alarm
Memory.
Smoke Alarm Hush®
Mode (SMART Hush®
CONTROL)
Red LED blinks every
2 sec.
After button push, voice “Hush
Mode Activated." Smoke alarm
pattern stops. (If there is too
much smoke to allow Hush®:
voice "Too Much Smoke,
cannot be Hushed" Smoke alarm
pattern continues.)
This feature is to be used
only when a known alarm
condition, such as smoke
from cooking, activates the
alarm.
CO alarm reset None After button push: CO alarm
pattern stops.
Unit is conrming if CO is
present or if it experienced
a nuisance situation.
Re-alarm means danger.
Move to fresh air and call
911.

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4. Troubleshooting Guide
If you require further information please contact Product Support at 1-800-880-6788 or write us at:
Kidde, 1016 Corporate Park Drive, Mebane, NC 27302. Our internet address is www.kidde.com.
Trouble Condition Visual Indications Audible Indications Action
Low Battery Amber LED blink
every 60 sec.
Chirp and voice “Replace
alarm” every 60 sec. (After 1
hour, voice occurs only once
every 15 mins)
Voice “Hush mode activated”
after button push (rst 7 days
only).
* Push button once to silence for
24 hrs. (Push button again to clear
Hush and perform a test.)
Note: 7 days after Low Battery
begins, the notications cannot be
silenced.
* Remove, discharge, dispose unit,
and replace as soon as possible.
Fault: Smoke Sensor
Error
Amber
LED blinks
every 30 sec.
Chirp every 30 sec, voice
“Smoke Sensor Error” every 60
sec. (After 1 hour, voice only
after button is pushed.)
* See Cleaning Your Alarm section.
* Push button once to attempt to
reset the unit.
* If error continues, remove,
discharge, dispose unit, and replace
as soon as possible.
Fault: CO Sensor
Error
Chirp every 30 sec, voice “CO
Sensor Error” every 60 sec.
(After 1 hour, voice only after
button is pushed.)
* Push button once to attempt to
reset the unit.
* If error continues, remove,
discharge, dispose unit, and replace
as soon as possible.
Fault: Memory Error Chirp every 30 sec, voice
“Memory Error” every 60 sec.
(After 1 hour, voice only after
button is pushed.)
* Push button once to attempt to
reset the unit.
* If error continues, remove,
discharge, dispose unit, and replace
as soon as possible.
End of Unit Life Amber LED blinks
twice every 30 sec.
Double chirp every 30 sec,
voice “Replace alarm” every 60
sec. (After 1 hour, voice occurs
only once every 15 mins.)
Voice “Hush mode activated”
after button push (rst 7 days
only).
* Push button once to silence for
24 hrs. (Push button again to clear
Hush and perform a test.)
Note: 7 days after End of Unit Life
begins, the notications cannot be
silenced.
* Remove, discharge, dispose unit,
and replace as soon as possible.

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5. Introduction, Product Features and Specifications
Introduction
This alarm detects products of combustion using a multi-criteria optical sensor and carbon monoxide using an
electrochemical cell. Many times throughout this User Guide, we will refer to Carbon Monoxide as “CO.”
Ten (10) years after the unit was installed, this unit will automatically alert you that it is time to replace the unit.
This is called “End of Unit Life” mode. See Troubleshooting Guide. To help identify the date to replace the unit,
a label has been affixed to the side of the alarm. Write the “Install date” in the space provided, and then write
in the “Replace by” date (10 years from initial power up) in permanent marker on the label prior to installing the
unit. Two labels have been provided that have important information on what to do in case of a CO alarm. Place
one label at eye level on a wall near the alarm after it is mounted, and one near a fresh air source such as a door
or window.
Product Features and Specifications:
•Temperature Operating Range: 40°F (4.4°C) to 100°F (37.8°C)
•Humidity Operating range: 10-95% RH non-condensing
•Audible Alarm: 85+ dB at 10’, 3.0 to 3.5 KHz pulsing alarm, with voice messages
“Fire!” and/or “Warning! Carbon Monoxide.”
•Smoke Sensor: Multi-Criteria Optical
•CO Sensor: Electrochemical
•Voice message system
•Smoke Alarm SMART Hush® Control
•Powered by a 3V DC non-replaceable sealed lithium battery.
•One large, user- friendly button.

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6. Limitations Of Smoke And Carbon Monoxide Alarms
WARNING: PLEASE READ CAREFULLY AND THOROUGHLY
•Life safety from fire in residential occupancies is based primarily on early notification to occupants of the
need to escape, followed by the appropriate egress actions by those occupants.
•There are situations where a smoke alarm may not be effective to protect against fire as stated in the NFPA
Standard 72. For instance:
a) smoking in bed
b) leaving children home alone
c) cleaning with flammable liquids, such as gasoline
•Fire warning systems for dwelling units are capable of protecting about half of the occupants in potentially
fatal fires. A smoke alarm may not be effective in some situations, such as during incendiary fires where the
fire grows so rapidly that an occupant’s egress is blocked even with properly located smoke alarms, or when
victims are intimate with the fire (for example, when a person’s clothes catch fire while cooking), too old or
young, or physically or mentally impaired such that they cannot escape even when warned early enough
that escape should be possible. For these people, additional strategies such as protection-in-place or assist-
ed escape or rescue are necessary.
•For maximum detection of the various types of fires that can occur within the home, including fast flaming
and slow smoldering, it is recommended that multi criteria smoke alarms be installed. This model meets
the latest residential smoke alarm standards, which includes enhanced resistance to nuisance alarms from
cooking.
•A battery powered alarm must have a battery of the specified type, in good condition and installed properly
(this model has a sealed battery).
•Smoke alarms must be tested regularly to make sure the battery and the alarm circuits are in good operating
condition.
•Smoke alarms cannot provide an alarm if smoke does not reach the alarm. Therefore, smoke alarms may
not sense fires starting in chimneys, within walls, on roofs, on the other side of a closed door or other
obstruction.
•If the alarm is located outside the bedroom or on a different floor, it may not wake up a sound sleeper.
•The use of alcohol or drugs may also impair one’s ability to hear the smoke alarm. For maximum protection,
a smoke alarm should be installed in each sleeping area on every level of a home.
This alarm is not intended to alert hearing impaired individuals.

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WARNING: PLEASE READ CAREFULLY AND THOROUGHLY
•IMPORTANT: This alarm is designed to detect carbon monoxide gas from ANY source of combustion. It is
NOT designed to detect any other gas.
CAUTION: This alarm will only indicate the presence of carbon monoxide gas at the sensor. Carbon
monoxide gas may be present in other areas. Never restart the source of a CO problem until it has been
fixed. NEVER IGNORE THE ALARM!
WARNING: THIS PRODUCT IS INTENDED FOR USE IN ORDINARY INDOOR LOCATIONS OF
FAMILY LIVING UNITS. IT IS NOT DESIGNED TO MEASURE COMPLIANCE WITH OCCUPATIONAL
SAFETY AND HEALTH ADMINISTRATION OSHA COMMERCIAL OR INDUSTRIAL STANDARDS. IT
IS NOT SUITABLE FOR INSTALLATION IN HAZARDOUS LOCATIONS AS DEFINED IN THE NATIONAL
ELECTRIC CODE. IT IS NOT DESIGNED FOR USE IN A RECREATIONAL VEHICLE RV OR BOAT.
•The installation of this device should not be used as a substitute for proper installation, use, and mainte-
nance of fuel burning appliances, including appropriate ventilation and exhaust systems.
•This alarm does not prevent CO from occurring, nor can it solve any existing CO problem.
WARNING: THIS DEVICE IS DESIGNED TO PROTECT INDIVIDUALS FROM ACUTE EFFECTS OF
CARBON MONOXIDE EXPOSURE. IT MAY NOT FULLY SAFEGUARD INDIVIDUALS WITH SPECIFIC
MEDICAL CONDITIONS. IF IN DOUBT, CONSULT A MEDICAL PRACTITIONER. INDIVIDUALS WITH
MEDICAL PROBLEMS MAY CONSIDER USING WARNING DEVICES WHICH PROVIDE AUDIBLE AND
VISUAL SIGNALS FOR CARBON MONOXIDE CONCENTRATIONS UNDER 30 PPM.
•This alarm has not been investigated for carbon monoxide detection below 70 PPM.
•This combination smoke and carbon monoxide alarm requires a continuous supply of electrical power – it
will not work without power.

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7. Recommended Locations For Smoke And Carbon Monoxide Alarms
•Locate smoke alarms in all sleeping areas. Try to monitor the exit path as the bedrooms are usually farthest
from the exit. If more than one sleeping area exists, locate additional alarms in each sleeping area.
•Locate additional alarms in stairways, because stairways act like chimneys for smoke and heat.
•Locate at least one alarm on every floor level.
•Locate an alarm in every bedroom.
•Locate an alarm in every room where electrical appliances are operated (i.e. portable heaters or humidifiers).
•Locate an alarm in every room where someone sleeps with the door closed. The closed door may prevent
an alarm not located in that room from waking the sleeper.
•Smoke, heat, and combustion products rise to the ceiling and spread horizontally. Mounting the smoke
alarm on the ceiling in the center of the room places it closest to all points in the room. Ceiling mounting is
preferred in ordinary residential construction.
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
Not within 6 feet of appliances
ACCEPTABLE
TOP OF ALARM
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the alarm.
Figure 7-A
ACCEPTABLE
TOP OF DETECTOR
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the detector.
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.

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ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
Not within 6 feet of appliances
ACCEPTABLE
TOP OF ALARM
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the alarm.
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
Not within 6 feet of appliances
ACCEPTABLE
TOP OF ALARM
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the alarm.
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
Not within 6 feet of appliances
ACCEPTABLE
TOP OF ALARM
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the alarm.
NFPA 72 states: “Smoke alarms in rooms with ceiling slopes greater than 1 ft in 8 ft (.3m in 2.4 m) horizontally shall
be located on the high side of the room.” NFPA 72 states: “A row of detectors shall be spaced and located within 3
ft (0.9m) of the peak of the ceiling measured horizontally.”
Figure 7-B Figure 7-C
ANYWHERE ALONG
THIS BOLD SURFACE
Locations permitted for smoke
alarms and smoke detectors
on tray-shaped ceilings.
Not within 6 feet of appliances
ACCEPTABLE
TOP OF ALARM
ACCEPTABLE HERE
Note: measurements shown
are to the closest edge
of the alarm.

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•For mobile home installation, select locations carefully to avoid thermal barriers that may form at the ceiling.
For more details, see MOBILE HOME INSTALLATION section.
•When mounting the alarm on the wall, use an inside wall with the top edge of the alarm a maximum
of 12” (30.5 cm) below the ceiling.
•Put smoke alarms at both ends of a bedroom hallway or large room if the hallway or room is more than 30
feet (9.1 m) long.
•Install Smoke Alarms on sloped, peaked or cathedral ceilings at or within 3ft (0.9m) of the highest point
(measured horizontally).
•Industry experts recommend a CO alarm be installed on each level of the home-ideally on any level with
fuel burning appliances and outside of sleeping areas.
This equipment should be installed in accordance with the National Fire Protection Association’s 72 (National Fire
Protection Association, Batterymarch Park, Quincy, MA 02269).
Mobile Home Installation
Modern mobile homes have been designed and built to be energy efficient. Install smoke alarms as recom-
mended above. In older mobile homes that are not well insulated compared to present standards, extreme heat
or cold can be transferred from the outside to the inside through poorly insulated walls and roof. This may create
a thermal barrier which can prevent the smoke from reaching an alarm mounted on the ceiling. In such units,
install the smoke alarm on an inside wall with the top edge of the alarm a maximum of 12” (30.5 cm) below the
ceiling.
If you are not sure about the insulation in your mobile home, or if you notice that the outer walls and ceiling are
either hot or cold compared to the room air temperature, install the alarm on an inside wall. NFPA 72 (National
Fire Protection Association) requires smoke alarms be installed in each sleeping area.
WARNING: TEST YOUR ALARM OPERATION AFTER MOBILE HOME HAS BEEN IN STORAGE OR
UNOCCUPIED, AND AT LEAST ONCE A WEEK DURING USE.

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8. Locations To Avoid
(See Figures 7-A, 7-B, & 7-C for recommended locations)
•In the garage. Products of combustion are present when you start your automobile.
•Normal cooking may cause nuisance alarms. If a kitchen alarm is desired, it should have an alarm silence
feature and should not be installed within 6 ft of cooking appliances.
•Do not install within 6 ft of heating appliances.
•Less than 4” (10cm) from the peak of an “A” frame type ceiling.
•In an area where the temperature may fall below 40ºF or rise above 100ºF, such as garages and unfinished
attics.
•In dusty areas. Dust particles may cause nuisance alarms or a failure to alarm.
•In very humid areas (above 95% RH, non-condensing) as moisture or steam can cause nuisance alarms.
•In insect-infested areas.
•Smoke alarms should not be installed within 3 ft (.9m) of the door to a bathroom containing a tub or shower,
forced air supply ducts used for heating or cooling, ceiling or whole house ventilating fans, or other high air
flow areas.
•Near lights. Electronic “noise” generated by the lights may cause nuisance alarms.
•Do not install near vents, flues, or chimneys.
•Do not install near fans, doors, windows or areas directly exposed to the weather.
NOTE : Smoke alarms are not to be used with detector guards unless the combination (alarm and detector
guard) has been evaluated and found suitable for that purpose.

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9. Installation And Activation
NOTE: One of the following steps must be taken to ensure activation:
A. Locate the red wheel on the back of the unit - turn the red wheel to
the “ON” position using the included white activation tool or a
standard screwdriver. Battery will remain active to allow for installa-
tion on mounting bracket.
B. Orient the unit with LED pointing to the right as shown in Figure
9-B, and rotate the unit a full 90 degrees clockwise onto the mounting
bracket. To allow for installation, battery will remain active when unit is
removed from mounting bracket.
NOTE: The battery activation is a one-time feature that occurs when
the alarm is rotated fully onto the mounting bracket. After activation,
the battery cannot be turned off, and can only be discharged at the
end of unit life. If the alarm is removed from the mounting bracket,
the battery will remain active. See Permanently Disable Alarm /
Discharge Battery section.
After selecting the proper location for your alarm, attach the mounting
bracket to the wall or ceiling. To ensure aesthetic alignment of the alarm with the hallway, or wall, the “A” line
on the mounting bracket should be parallel with the hallway when ceiling mounted, or horizontal when wall
mounted.
•Install the alarm fully on the mounting bracket by rotating the alarm in a clockwise direction.
The alarm is now activated! After installation / activation, test your alarm as described in Operation and Testing section.
WARNING: FAILURE TO PROPERLY INSTALL AND ACTIVATE THIS ALARM WILL PREVENT
PROPER OPERATION OF THIS ALARM AND WILL PREVENT ITS RESPONSE TO FIRE HAZARDS.
Figure 9 -C
Figure 9 -B
Figure 9 -A
底盘
注意“A”
标记线的方向.
LED 指示灯
按上面的图示，报警器对齐底盘“A”标记线，
安装到报警器到底盘上，顺时针旋转90度。
拆卸 安装
USE ACTIVATION
TOOL OR SCREWDRIVER
ON
Break
tab
This alarm is not compatible
with Kidde CO-relays
and Strobes manufactured
before Nov. 1, 2011
PERMANENTLY
DISABLE and
DISCHARGE
ALARM
(2) Rotate slotted
arrow clockwise to
disable & discharge.
(3) Install new alarm.
(1) Push in the dashed
area with a screwdriver
to break tab.
When unit
announces
“Replace alarm”
CERTIFIED
SAFETY
SIGNALING
US
S1816
Multi-criteria Smoke Alarm
Helps Reduce
Cooking
Nuisance Alarms
UL 217 8
th
Ed.
A
When mounting
in a hallway,
the "A" line should
be parallel with the
hallway. When wall
mounting, the "A"
line should be
horizontal.
Alignment Marks
(”A” Line) on
Mounting
Bracket
Mark and drill two 3/16" (5mm)
holes for wall anchors.

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10. Operation And Testing
Operation
The alarm is operating once it is activated and
testing is complete (see “TESTING” below).
When products of combustion (smoke or CO)
are sensed, the unit sounds a loud alarm with voice messages. See Sections 1 and 2 for alarm signal descriptions.
In high levels of CO, the unit will go into alarm in a shorter period of time than at low levels of CO.
Testing
Test your alarm weekly by pressing and releasing the button quickly. A quick beep will confirm the button has
been pushed followed by the test sequence. See Other Alarm Visual and Audible Indicators table. The alarm
and voice will sound if the electronic circuitry, horn, speaker, and battery are working. If the alarm or voice does
not sound, or gives erratic or low volume sound, the unit must be replaced. See Permanently Disable Alarm /
Discharge Battery section to determine how to prepare the unit for shipment or disposal.
WARNING: DUE TO THE LOUDNESS OF THE ALARM, ALWAYS STAND ABOUT 2.5 FEET AWAY
FROM THE UNIT OR USE EAR PROTECTION WHEN TESTING.
WARNING: DO NOT USE AN OPEN FLAME TO TEST YOUR ALARM, YOU COULD DAMAGE THE
ALARM OR IGNITE COMBUSTIBLE MATERIALS AND START A STRUCTURE FIRE.
Chirping
When End of Unit Life or Low Battery chirping begins, you can temporarily silence these chirps by pressing
the button.
WARNING: REPLACE UNIT AS SOON AS POSSIBLE WHEN IN END OF UNIT LIFE OR LOW BATTERY MODE.
CO ALARM SENSOR RESPONSE TIMES
At 70 PPM, the unit must alarm within 60-240 minutes.
At 150 PPM, the unit must alarm within 10-50 minutes.
At 400 PPM, the unit must alarm within 4-15 minutes.

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11. Recognizing Nuisance Alarms
Smoke Nuisance
HUSH®: If you know why the alarm is sounding, and you can verify that it is not a life threatening situation, you
can push the button to silence the alarm for 8-10 minutes. If the smoke is not too dense, that unit will silence.
After the Hush® period, the smoke alarm will automatically reset and sound the alarm if particles of combustion
are still present. You can use Hush® repeatedly until the air has been cleared of the condition causing the alarm.
NOTE: Dense smoke will override Hush® and sound a continuous alarm. If no fire is present, check to
see if one of the reasons listed in “Locations to avoid” may have caused the alarm. If a fire is discovered,
get out and call the fire department or 911.
This alarm is designed to minimize nuisance alarms. Cigarette smoke will not normally cause the unit to alarm,
unless the smoke is blown directly into the alarm. Combustion particles from cooking may set off the alarm if it
is located too close to a cooking appliance. Large quantities of combustible particles are generated from spills or
when broiling. Using the fan on a range hood which vents to the outside (non-recirculating type) will also help
prevent nuisance alarms from occurring by removing these combustible products from the kitchen.
Carbon Monoxide (CO) Nuisance
RESET: Pushing the button during CO alarm allows the unit to reset calculations and double check for the
presence of CO. If the unit re-alarms within 6 minutes, it is sensing high levels of CO which can quickly become a
dangerous situation. Move to fresh air and call 911.
WARNING: IT IS IMPOSSIBLE TO DETERMINE THE SOURCE OF A CO ALARM USING SIGHT OR
SMELL. ALWAYS CONSIDER A CO ALARM EVENT AS DANGEROUS.

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12. Battery
This alarm is powered by a non-replaceable, sealed lithium battery system. No battery installation or
replacement is necessary for the life of the alarm.
IMPORTANT: Constant exposure to high or low humidity or temperatures may reduce battery life.
WARNING: NO SERVICEABLE PARTS INCLUDED. DO NOT ATTEMPT TO OPEN THE ALARM FOR
ANY REASON! DO NOT TRY TO REPAIR THE ALARM YOURSELF.
Low Battery
This alarm is equipped with a low battery monitor circuit. If the battery capacity is nearing the point where it can
no longer provide adequate power for all alarm functions, the low battery condition will occur. See Trouble-
shooting Guide. The unit must be replaced within 7 days of the first occurrence of the “Low Battery Warning” to
provide continuous alarm protection.
CAUTION: THE BATTERY USED IN THIS DEVICE MAY PRESENT A FIRE OR CHEMICAL BURN
HAZARD IF MISTREATED. DO NOT RECHARGE, DISASSEMBLE, HEAT ABOVE 100°C 212°F OR
DISPOSE OF IN FIRE.

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13. Permanently Disable Alarm / Discharge Battery
WARNING: FAILURE TO DISCHARGE ALARM BATTERY AS INSTRUCTED PRIOR TO DISPOSAL
MAY CREATE POTENTIAL FOR LITHIUM BATTERY RELATED FIRE OR HAZARD.
WARNING: DISCHARGING THE ALARM BATTERY IS PERMANENT
•Once the alarm battery has been discharged, it cannot be reactivated!
•Once discharged, the alarm will NO LONGER DETECT SMOKE OR CO.
•Once the alarm battery is discharged, the battery is depleted and the alarm will no longer function.
•Once the alarm battery has been discharged, the alarm cannot be mounted onto the mounting bracket or
reactivated.
To Permanently Disable Alarm / Discharge Battery:
•Rotate the alarm counterclockwise to remove it from the mounting
bracket.
•Push in the dashed area with a screwdriver to break tab.
•After the tab is broken, use the screwdriver to turn the red slotted
arrow to the "Permanently Disable Alarm / Discharge Battery"
location. This will disable the alarm, stop the low battery or end of
unit life “chirps” and render the alarm safe for disposal by draining
the battery.
Figures 13-A (top) and 13-B (bottom)

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14. General Carbon Monoxide (CO) Information
Carbon monoxide (CO) is a colorless, odorless, and tasteless poison gas that can be fatal when inhaled. CO inhib-
its the blood’s capacity to carry oxygen.
Possible Sources of CO
Inside your home, appliances used for heating and cooking are the most likely sources of CO. Vehicles and other
combustion engines running in an attached garage and using a charcoal/gas grill or hibachi in an enclosed area
are all possible sources of CO. CO can be produced when burning any fossil fuel: gasoline, diesel, propane, natural
gas, oil and wood. It can be produced by any fuel-burning appliance that is malfunctioning, improperly installed,
or not ventilated correctly, such as: Furnaces/boilers, gas ranges/stoves, gas clothes dryers, water heaters, por-
table fuel burning space heaters, fireplaces, wood-burning stoves and certain swimming pool heaters. Blocked
chimneys or flues, back drafting and changes in air pressure, corroded or disconnected vent pipes, or a loose or
cracked furnace heat exchanger can also release CO into your building.
The following conditions can result in transient CO situations:
Excessive spillage or reverse venting of fuel-burning appliances caused by outdoor ambient conditions such as:
Wind direction and/or velocity, including high gusts of wind, heavy air in the vent pipes (cold/humid air with
extended periods between cycles), negative pressure differential resulting from the use of exhaust fans, simul-
taneous operation of several fuel-burning appliances competing for limited internal air, vent pipe connections
vibrating loose from clothes dryers, furnaces/boilers, or water heaters, obstructions in, or unconventional, vent
pipe designs which can amplify the above situations, extended operation of unvented fuel-burning devices
(range, oven, fireplace, etc.), temperature inversions which can trap exhaust gases near the ground, car idling in
an open or closed attached garage, or near a home.