BRK electronic CO2120PN User manual

MODEL CO2120PN—User’s Manual
120V Plug-In Carbon Monoxide Alarm
With Silence Feature
M06-1044-000 6/99
120V AC 60 Hz .085A Standby .087A Alarm

TABLE OF CONTENTS
CHAPTER 1: INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Basic Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
How Your CO Alarm Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
What The Lights and Alarm Tones Mean. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
CO Alarm Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
CHAPTER 2: INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Where to Install CO Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Where NOT To Install CO Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
How to Install Your CO Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
CHAPTER 3: IF YOUR CO ALARM ALARMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
If the Alarm Signal Sounds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Finding the Source of CO After an Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Using the Silence Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
CHAPTER 4: TESTING AND MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
CHAPTER 5: WHAT YOU NEED TO KNOW ABOUT CO . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
What is CO?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Symptoms of CO Poisoning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Potential Sources Of CO In The Home . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
How Can I Protect My Family? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
CHAPTER 6: UNDERWRITERS LABORATORIES INC. UL2034 . . . . . . . . . . . . . . . . . . . . . 14
CHAPTER 7: TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
CHAPTER 8: GENERAL LIMITATIONS OF CO ALARMS. . . . . . . . . . . . . . . . . . . . . . . . . . . 16
LIMITED WARRANTY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BACK COVER
PLEASE READ CAREFULLY AND SAVE: This unit was shipped with a user’s manual that contains
important information about its operation. If you are installing this unit for use by others, you must
leave this manual—or a copy of it—with the user.

1
CHAPTER 1: Introduction
BASIC SAFETY INFORMATION
IMPORTANT!
Dangers, Warnings, and Cautions alert you to
important operating instructions or to
potentially hazardous situations. Pay special
attention to these items.
IMPORTANT!
THIS IS NOT A SMOKE ALARM! This CO Alarm
is designed to detect carbon monoxide from
ANY source of combustion. It is NOT designed
to detect smoke, fire, or any other gas.
IMPORTANT!
This CO Alarm is approved for use in single-
family residences. It is NOT designed for marine
use.
CAUTION!
This CO Alarm will only indicate the
presence of carbon monoxide gas at the
sensor. Carbon monoxide gas may be
present in other areas.
WARNING!
The Silence Feature is for your convenience
only and will not correct a CO problem.
Always check your home for a potential
problem after any alarm. Failure to do so can
result in injury or death.
WARNING!
This CO Alarm can not operate without
continuous electricity. It does not operate
during a power failure.
WARNING!
NEVER ignore your Carbon Monoxide Alarm
if it alarms. Refer to “What To Do If Your CO
Alarm Alarms” for more information. Failure
to do so can result in injury or death.
WARNING!
Test the CO Alarm once a week. If the CO
Alarm ever fails to test correctly, have it
replaced immediately! If the CO Alarm is not
working properly, it cannot alert you to a
problem.
WARNING!
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 may consider using
warning devices which provide audible and
visual signals for carbon monoxide
concentrations under 30 ppm.

2
HOW YOUR CO ALARM WORKS
General Information
CAUTION!
Leave your CO Alarm plugged in year-round.
CO problems can occur any time during the
year, and this alarm can only alert you if it is
plugged in and receiving power.
This CO Alarm is intended for use in a standard,
unswitched 120V AC wall outlet. It is not
intended for use in extension cords, power
strips, or outlets controlled by a switch or
dimmer. These may not provide continuous
power to the unit.
When fully powered, it samples the air and
takes a new reading about every second. A
microchip inside the unit stores each reading,
and remembers the levels of CO it has been
exposed to over time. The unit goes into alarm
mode when it has been exposed to a “critical”
level of CO (measured in parts per million or
“ppm”) within a specified time (measured in
minutes).
This Carbon Monoxide Alarm features a
permanently installed sensor, three colored
indicator lights, and an 85 dB alarm horn. It
also has a silence feature to temporarily quiet
the alarm horn.
The Cover Of Your CO Alarm
Malfunction Warning
This unit performs self-diagnostic tests
approximately every second. If the Alarm
malfunctions, it should be replaced immediately.
1Test/Silence Button
2POWER Light (Green)
3SERVICE Light (Yellow)
4ALARM Light (Red)
5Air Vents
6(Behind the Cover) Alarm Horn: 85db
audible alarm for test, alarm, and unit
malfunction warning

3
WHAT THE LIGHTS AND ALARM TONES MEAN
During Power Up (or After Power Outage)
Green light ON. Yellow & red lights OFF.
Horn “chirps” once.
During an Alarm
Green light ON. Yellow light OFF. Red light
FLASHES. Repeating horn pattern: 4 beeps,
then a pause, 4 beeps, then a pause.
During Normal Operation
Green light ON. Yellow & red lights OFF.
Horn silent.
During Alarm Malfunction
Green light ON. Yellow light ON. Red light
FLASHES. Horn “chirps” about twice a minute.
During Normal Test
All three lights flash briefly. Horn pattern
repeats twice: 4 beeps, then a pause, 4 beeps,
then a pause.
Using the Silence Feature in Alarm
Green light ON. Yellow light OFF. Red light
FLASHES. Horn silent for 4 minutes. Refer to
Chapter 3 for details on the Silence feature.

4
CO ALARM SPECIFICATIONS
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.
Required Alarm Levels: Before 10% COHb
exposure at levels of 30% to 70% Relative
Humidity (RH):
• 400 ppm CO between 4 and 15 minutes
• 150 ppm CO between 10 and 50 minutes
• 70 ppm CO between 60 and 240 minutes
The unit is designed not to alarm when
exposed to a constant level of 30 ppm
for 30 days.
Audible Alarm: 85dB minimum at 10 feet
Power: Powered by 120V AC. When power is
on, green light shines continuously.
Malfunction: Yellow light shines continuously.
Red light flashes. Horn chirps twice a minute.
Dimensions: 5.83" x 3.32" x 1.6" (Approx.)
Supply Voltage: 120V AC 60Hz
.085A Standby .087A Alarm
During Alarm: COAlarmhornsoundswhilethe
red light flashes rapidly.
Warranty: 5-year limited warranty.
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, 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.

5
CHAPTER 2: Installation
WHERE TO INSTALL
CO ALARMS
The Consumer Product Safety Commission
(CPSC) recommends the use of at least one CO
Alarm per household, located near the sleeping
area. For added protection, install additional
CO Alarms in each separate bedroom, and on
every level of your home.
If your bedroom hallway is longer than 40 feet,
install a CO Alarm at BOTH ends of the hallway.
In a Single-level Home:
• Install at least one CO Alarm near or
within each separate sleeping area.
• Foraddedprotection,installanadditional
CO Alarm at least 20 feet (6 meters) away
from the furnace or fuel burning heat
source.
In a Multi-level Home:
• Install at least one CO Alarm near or
within each separate sleeping area.
• For added protection, install at least one
CO Alarm on each level of the home. If
you have a basement, install that CO
Alarm at the top of the basement stairs.
• Foraddedprotection,installanadditional
CO Alarm at least 20 feet (6 meters) away
from the furnace or fuel burning heat
source.
WARNING!
This unit does not work without power.
Choose an outlet where it can’t be
accidentally unplugged or switched off by
children. Keep small children away from the
unit. Teach them not to play with it or unplug
it. Explain what the alarms mean.
GARAGE
SUGGESTED AREAS FOR INSTALLING CO ALARMS
BEDROOM
BEDROOM
HALL
LIVING ROOM KITCHEN
BASEMENT
BEDROOM

6
WHERE NOT TO INSTALL
CO ALARMS
DO NOT locate this CO Alarm:
• In garages, kitchens, furnace rooms,
or in any extremely dusty, dirty or
greasy areas.
• Closer than 20 feet from a furnace or
other fuel burning heat source, or fuel
burning appliances like a water heater.
• Within 5 feet of any cooking appliance.
• In extremely humid areas. This alarm
should be at least 10 feet from a bath
or shower, sauna, humidifier, vaporizer,
dishwasher, laundry room, utility room
or other source of high humidity.
• In areas where temperature is colder than
40˚F (4˚C) or hotter than 100˚F (38˚C).
These areas include unconditioned crawl
spaces, unfinished attics, uninsulated or
poorly insulated ceilings, porches, and
garages.
• In turbulent air, like near ceiling fans,
heat vents, air conditioners, fresh air
returns, or open windows. Blowing air
may prevent CO or smoke from reaching
the sensors.
• In direct sunlight.
• In outlets covered by curtains or
other obstruction.
WARNING!
This CO Alarm is designed for use inside a
single-family home or apartment. It is not
meant to be used in common lobbies,
hallways, or basements of multi-family
buildings unless working CO Alarms are also
installed in each family living unit. CO
Alarms in common areas may not be heard
from inside individual family living units.
WARNING!
This CO Alarm alone is not a suitable
substitute for complete detection systems in
places which house many people, like hotels
or dormitories, unless a CO Alarm is also
placed in each unit.
WARNING!
DO NOT use this CO Alarm in warehouses,
industrial or commercial buildings, special-
purpose non-residential buildings, RVs,
boats, or airplanes. This CO Alarm is
specifically designed for residential use,
and may not provide adequate protection in
non-residential applications.

7
HOW TO INSTALL
YOUR CO ALARM
WARNING!
This CO Alarm can not operate without
continuous electricity. It does not operate
during a power failure. Do not use in an
extension cord, or outlet controlled by a
dimmer or switch—unit must have a
constant power supply.
CAUTION!
Leave your CO Alarm plugged in year-round.
CO problems can occur any time during the
year, and this alarm can only alert you if it is
plugged in and receiving power.
1. Plug the unit into a standard UNSWITCHED
120V AC outlet. In horizontally or vertically
positioned wall outlets, mount unit with Test/
Silence button facing upward.
2. Make sure green light shines when you plug
in the unit. It will shine continuously when
unit is receiving power. The horn will “chirp”
once during power up, or when power is
restored after an outage.
3. Test by pressing the Test/Silence button
firmly until the unit sounds: four loud beeps,
pause, 4 beeps. The sequence should last
5-6 seconds. During testing, the green,
yellow, and red lights flash. This is normal.
4. While testing the unit, have a family member
check that the horn can be easily heard from
the sleeping areas. The unit should be
located where it can wake you if it alarms at
night.
5. Find the pair of self-adhesive labels included
with this CO alarm.
• On each label write in the phone number
of your emergency responder (like 911)
and a qualified appliance technician.
• Place one label near the CO Alarm, and
the other label in the “fresh air” location
you plan to go if the alarm sounds.
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.”

8
CHAPTER 3: If Your CO Alarm Alarms
WARNING!
Actuation of your CO alarm indicates the
presence of carbon monoxide (CO) which
can kill you. In other words, when your CO
Alarm alarms, you must not ignore it!
If the 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:
_______________________________________
Finding the Source of CO
After an Alarm
Because CO may dissipate by the time an
investigator arrives, it may be difficult to locate
the source of CO. See Chapter 5 “What You
Must Know About CO.”
BRK Brands, Inc.
shall not be obligated to pay for any carbon
monoxide investigation or service call.
“ALARM-MOVE
TO FRESH AIR”
If you hear the alarm horn
and the red light is
flashing, move everyone to
a source of fresh air. DO
NOT unplug the CO Alarm!

9
Using the Silence Feature
WARNING!
NEVER unplug your CO alarm to silence the
horn. Use the silence feature. Unplugging
the CO alarm removes your protection!
See previous page for details on responding
to an alarm.
The silence feature is intended to temporarily
silence your CO Alarm’s alarm horn while you
correct the problem—it will not correct a CO
problem. While the alarm is silenced, it will
continue to monitor the air for CO.
When CO reaches the Full Alarm level, the
Alarm will sound— repeating horn pattern:
4 beeps, a pause, 4 beeps, etc. Press and hold
the Test/Silence button until the horn is silent.
The initial Silence cycle will last approximately
4 minutes.
NOTE:
After initial 4-minute Silence cycle, the
CO Alarm re-evaluates present CO levels and
responds accordingly. If CO levels remain
potentially dangerous—or start rising higher—
the horn will start sounding again.
While the detector is silenced:
If the CO Alarm...
is silent for only
4 minutes, then starts sounding loudly—
4 beeps, then a pause, 4 beeps, then a pause.
Red light continues flashing...
This means... CO levels are still potentially
dangerous.
If the CO Alarm... remains silent .
Only the green light is on....
This means... unit has returned to normal
operation.

10
CHAPTER 4: Testing and Maintenance
WEEKLY TESTING
Push and hold the Test/Silence button on the
cover until a loud alarm sounds— 4 beeps, a
pause, then 4 beeps. The alarm sequence
should last for 5-6 seconds. If the Alarm ever
fails to test properly, replace it immediately.
If the CO Alarm is not working properly, refer
to the “Limited Warranty” at the end of this
manual.
WARNING!
The Test/Silence button is the only proper
way to test the CO Alarm. NEVER use
vehicle exhaust! Exhaust may cause
permanent damage and voids your warranty.
WARNING!
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.
REGULAR MAINTENANCE
To keep the CO Alarm in good
working order:
• Test it every week using the
Test/Silence button.
• Vacuum the CO Alarm cover at least
twice a year, using the soft brush
attachment. Test the Alarm again after
vacuuming.
CAUTION!
DO NOT spray cleaning chemicals or insect
sprays directly on or near the CO Alarm. DO
NOT paint over the CO Alarm. Doing so may
permanently damage the CO Alarm.
IMPORTANT!
Household cleaners, aerosol chemicals and
other contaminants can affect the sensor. When
using any of these materials near the alarm,
make sure the room is well ventilated.
IMPORTANT!
If your home is being fumigated, unplug the unit
temporarily and put it where it will not be
exposed to chemicals or fumes. When
fumigation is complete and all traces of fumes
clear, plug the unit back in and retest it.

11
CHAPTER 5: 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.
CAUTION!
Some individuals are more sensitive to CO
than others, including people with cardiac or
respiratory problems, infants, unborn
babies, pregnant mothers, or elderly people
can be more quickly and severely affected
by CO. Members of sensitive populations
should consult their doctors for advice on
taking additional precautions.
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.
BRK Brands, Inc. shall not be obligated to
pay for any carbon monoxide investigation
or service call.

12
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.

13
How Can I Protect My Family?
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 pre-
vent 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 equip-
ment annually. Many local gas or oil com-
panies and HVAC companies offer
appliance inspections for a nominal fee.
• Make regular visual inspections of all
fuel-burning appliances. Check appli-
ances 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 fur-
nace closed. Use vents or fans when they
are available on all fuel-burning appli-
ances. 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 signifi-
cantly 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 alarms.

14
CHAPTER 6: Underwriters Laboratories Inc. UL2034
What Levels of CO Cause an Alarm?
Underwriters Laboratories Inc. UL2034 defines
3 specific alarm points by which all residential
CO Alarms must alarm. 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
of CO, IT MUST ALARM BETWEEN
60 and 240 MINUTES.
IMPORTANT!
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.
IMPORTANT!
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 alarms. 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!

15
CHAPTER 7: Troubleshooting Guide
Problem... This means... You should...
Green light is OFF. Unit will
notalarmwhenyoupressthe
Test/Silence button.
Unit may not be
plugged all the
way in, or is not
receiving power.
Gently push unit all the way into outlet.
Make sure it is not plugged into an outlet
controlled by a switch.
Unit “chirps” about twice a
minute. Green and Yellow
lights are ON. Red light
FLASHES.
Unit malfunction.
Unit needs to be
replaced.
Units under warranty should be returned to
manufacturer for replacement. See Chapter 8
“Limited Warranty” for details.
CO Alarm goes back into
alarm 4 minutes after you
press the Test/Silence
button.
CO levels are
still potentially
dangerous.
Refer to Chapter 3 “If Your CO Alarm Alarms” for
details on how to respond to an alarm. If anyone
is feeling ill, EVACUATE your home immediately.
CO Alarm alarms frequently
eventhough no highlevels of
CO are revealed in an
investigation.
The CO Alarm may
be improperly
located. Refer to
“Where to Install
Your CO Alarm.”
Relocate your alarm. If frequent alarms continue,
have home rechecked for potential CO
problems. You may be experiencing an
intermittent CO problem.
If you have any questions that cannot be answered by reading this manual, call our Consumer Affairs
Department at 1-800-323-9005.

16
CHAPTER 8: General Limitations Of CO Alarms
This 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
detectors must be met.
CO Alarms will not work without power. This CO
Alarm requires a continuous supply of AC power.
Plug into an unswitched 120V AC outlet only.
This CO Alarm will not sense carbon monoxide
that does not reach the sensor. This CO Alarm
will only sense CO at the sensor. CO may be
present in other areas. Doors or other obstructions
may affect the rate at which CO reaches the CO
Alarm. For this reason, if bedroom doors are
usually closed at night, we recommend you install
a CO Alarm in each bedroom and in the hallway
between them.
CO Alarms may not sense CO on another level
of the home. For example, a CO Alarm on the
second level, near the bedrooms, may not sense
CO in the basement. For this reason, one CO
Alarm may not give adequate warning. Complete
coverage is recommended. Place CO Alarms on
each level of the home.
CO Alarms may not be heard. The alarm horn
loudness meets or exceeds current UL standards
of 85 dB at 10 feet. However, if the 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 CO Alarm is not
intended for people who are hearing impaired.
CO Alarms are not a substitute for a smoke
alarm. Although fire is a source of carbon
monoxide, this CO Alarm does not sense smoke
or fire. This CO Alarm senses CO that may be
escaping unnoticed from malfunctioning furnaces,
appliances, or other sources. Early warning of fire
requires the installation of smoke alarms.
CO Alarms are not a substitute for life
insurance. Though these CO Alarms warn against
increasing CO levels, BRK Brands, Inc. does not
warrant or imply in any way that they will protect
lives from CO poisoning. Homeowners and renters
must still insure their lives.
CO Alarms have a limited life. Although the 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 your CO Alarm
weekly.
CO Alarms are not foolproof. Like all other
electronic devices, CO Alarms have limitations.
They can only detect CO that reaches their
sensors. They may not give early warning to rising
CO levels if the CO is coming from a remote part
of the home, away from the CO Alarm.

Limited Warranty
Coverage: BRK Brands, Inc. warrants its
enclosed carbon monoxide alarm to be free from
defects in materials and workmanship under
normal use for a period of five years from the date
of purchase. During the first year after the date of
purchase, BRK Brands, Inc. will replace any
defective carbon monoxide alarm without charge.
During the next four years, BRK Brands, Inc. will
replace any defective carbon monoxide alarm at a
charge to you not to exceed BRK Brands, Inc.’s
cost. 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. If this carbon monoxide
alarm is installed by a contractor, this warranty will
be valid for the homeowner (or the first
homeowner after installation) from the date of
initial purchase by the contractor and is not
transferable. Dealers, service centers, or retail
stores selling this product 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 or use contrary to the
operating instructions, disassembly, repair or
alteration by anyone other than BRK Brands, Inc.
Further, the warranty does not cover acts of God,
such as fire, flood, hurricanes and tornadoes.
BRK Brands, Inc. 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 for
five years. 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 exclusions 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.
Service: Units under warranty and in need of
repair should be returned, shipping prepaid, to
BRK Brands, Inc., Attn.: Consumer Affairs,
3920 Enterprise Court, Aurora, IL 60504-8132.
For your records, please record:
Date Purchased:
Where Purchased:
M06-1044-000 6/99
BRK Electronics®is a registered
trademark of BRK Brands, Inc.