First Alert CO604 User Manual
First Alert Car alarm
WHERE TO INSTALL 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.
If your bedroom hallway is longer than 40 feet (12 meters), 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.
For added protection, install an additional 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
For added protection, install an additional CO Alarm at least 20 feet
(6 meters) away from the furnace or fuel burning heat source.
This unit should receive continuous electrical power. (The battery is
meant for emergency back-up only). 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.
WHERE CO ALARMS SHOULD NOT BE INSTALLED
DO NOT locate this CO Alarm:
In garages, kitchens, furnace rooms, or in any extremely dusty, dirty
or greasy areas.
Closer than 15 feet (4.6 meters) from a furnace or other fuel burning heat
source, or fuel burning appliances like a water heater.
Within 5 feet (1.5 meters) of any cooking appliance.
In extremely humid areas. This Alarm should be at least 10 feet (3 meters)
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 non-airconditioned 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 from
reaching the sensors.
In direct sunlight.
In outlets covered by curtains or other obstruction.
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.
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.
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
Printed in Mexico
PLEASE READ CAREFULLY AND SAVE.
This user’s manual contains important information about your Carbon
Monoxide (CO) Alarm’s operation. If you are installing this CO alarm for use
by others, you must leave this manual—or a copy of it—with the end user.
© 2009 BRK Brands, Inc. All rights reserved.
Distributed by BRK Brands, Inc.
3901 Liberty Street Road, Aurora, IL 60504-8122
Consumer Affairs: (800) 323-9005 • www.firstalert.com
BASIC SAFETY INFORMATION
Dangers, Warnings, and Cautions alert you to important operating
instructions or to potentially hazardous situations. Pay special
attention to these items.
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.
This CO Alarm is approved for use in single-family residences.
It is NOT designed for marine or RV use.
This CO Alarm will only indicate the presence of carbon monoxide gas
at the sensor. Carbon monoxide gas may be present in other areas.
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.
This CO Alarm should receive continuous 120VAC, 60 Hz, pure sine
wave electrical power. (The battery is meant for emergency back-up
only). Do not use in an extension cord or outlet controlled by a dim-
mer or switch. In order for the emergency battery back-up to work,
a working (fresh) battery must be properly installed.
NEVER ignore your Carbon Monoxide Alarm if it alarms. Refer to
“If Your CO Alarm Sounds” for more information. Failure to do so can
result in injury or death.
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.
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) commer-
cial 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 infor-
mation on carbon monoxide and your medical condition contact your
BRK Brands, Inc. ("BRK") the maker of First Alert
brand products, warrants
that for a period of 5 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 remanu-
factured product or component. If the product is no longer available, replace-
ment 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
If service is required, do not return the product to your retailer.
In order to obtain warranty service, contact the Consumer Affairs Division at
1-800-323-9005, 7:30 AM to 5:00 PM, Central Standard Time, Monday through
Friday. To assist in serving you, please have the model number and date of
purchase available when calling.
For Warranty Service return to:
BRK Brands, Inc., 25 Spur Drive, El Paso, TX 79906
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.
POWER/ALARM Light (Red)
Alarm Horn: 85 dB audible
alarm for test, alarm, and unit
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
• Vent pipe connections vibrating loose from clothes dryers, furnaces, or
• 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?
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
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
Check for exhaust backflow from CO sources. Check the draft hood
on an operating furnace for a backdraft. Look for cracks on furnace
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.
SYMPTOMS OF CO POISONING
These symptoms are related to CO POISONING and should be discussed
with ALL household members.
Slight headache, nausea, vomiting, fatigue (“flu-like” symptoms).
Throbbing headache, drowsiness, confusion, fast heart rate.
Convulsions, unconsciousness, heart and lung failure. Exposure to carbon
monoxide can cause brain damage, death.
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!
UNDERWRITERS LABORATORIES INC.
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 of CO, IT MUST ALARM BETWEEN
60 and 240 MINUTES.
* Approximately 10% COHb exposure at levels of 10% to 95% Relative
The unit is designed not to alarm when exposed to a constant level
of 30 ppm for 30 days.
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
Audible Alarm: 85 dB minimum at 10 feet (3 meters).
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 may not waken all individuals. If children or others do not readily
waken to the sound of the CO alarm, or if there are infants or family members
with mobility limitations, make sure that someone is assigned to assist them in
the event of an emergency.
CO Alarms will not work without power. This CO Alarm requires a continu-
ous supply of AC power. Plug into an unswitched 120V AC outlet only. The
battery back-up is for emergency use only!
CO Alarms for Solar or Wind Energy users and battery backup power
AC powered CO Alarms should only be operated with true or pure
sine wave inverters. Operating this CO 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.
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 (3 meters). 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.
60 Hz 0.09A
SUGGESTED AREAS FOR INSTALLING ADDITIONAL CO ALARMS
REQUIRED TO MEET NFPA RECOMMENDATIONS
is a registered trademark of the First Alert Trust.
Printed in Mexico M08-0190-004 P
120V PLUG-IN CARBON MONOXIDE ALARM WITH
BATTERY BACK-UP AND TEST/SILENCE
HOW YOUR CO ALARM WORKS
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, the unit 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 Alarm
sounds 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
CO Alarm features a permanently installed sensor, an indicator light, and an
85 dB alarm horn. It also has a Silence Feature to temporarily quiet the alarm
This unit performs self-diagnostic tests approximately every second. If the
Alarm malfunctions, replace it immediately.
THE COVER OF YOUR CO ALARM
UNDERSTANDING YOUR CO ALARM
What you see and hear during installation
WHEN YOU FIRST INSTALL THE
POWER/ALARM Light: Flashes
once a minute
WHEN YOU FIRST PLUG-IN
THE CO ALARM:
UNDER NORMAL CONDITIONS
POWER/ALARM LIGHT: Shines
WHEN YOU TEST THE CO
HORN: Sounds loudly - 4
beeps, pause, 4 beeps, pause
What you see and hear under different conditions
DURING A POWER FAILURE
(IN BATTERY BACK-UP):
POWER/ALARM LIGHT: Flashes
once a minute.
WHEN THE ELECTRICITY COMES
POWER/ALARM LIGHT: Shines
IF BATTERY BECOMES LOW
OR IS MISSING:
Chirps once a minute*
POWER/ALARM LIGHT: Flashes
once a minute
IF THE CO ALARM IS NOT
HORN: Three chirps every
POWER/ALARM LIGHT: Flashes
three times in sync with the horn.
IF THE CO ALARM HAS REACHED
ITS END OF LIFE:
HORN: Five chirps every
POWER/ALARM LIGHT: Flashes
five times in sync with the horn.
What you see and hear if CO is detected
ALARM LEVELS OF CO ARE
HORN: Sounds loudly - 4 beeps,
pause, 4 beeps, pause.
This sequence repeats for as
long as the unit is in alarm*
*Note: If unit goes into alarm
under battery back-up power,
the regular 4 beeps-brief pause
cycle will repeat for four minutes.
After four minutes, the pause will
increase to 1 minute.
IF YOU SILENCE THE ALARM:
HORN: Silent for about
*Note: After 4 minutes, if CO
levels drop below alarm levels,
the unit will remain silent and
return to normal operation.
If CO presence still indicates a
potentially dangerous situation,
the horn will sound again.
IF THE CO LEVELS RETURN
PLUG THE ALARM INTO AN OUTLET
This CO Alarm should receive continuous electrical power. The battery is
meant for emergency back-up only. Do not plug this Alarm into an outlet
controlled by a dimmer or switch.
1. Plug the unit into a standard UNSWITCHED 120V AC outlet. The unit
should be located where it can wake you if it alarms at night.
2. Make sure the POWER/ALARM light shines continuously when you
plug it in.
3. Test by pressing the Test/Silence button firmly until the unit sounds:
4 beeps, pause, 4 beeps. During testing, the POWER/ALARM light will
flash. This is normal.
PREPARE YOUR ALARM LABELS
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.”
HOW TO INSTALL YOUR CO ALARM
IMPORTANT! Read all instructions before using this product.
TO ACTIVATE OR CHANGE
1. Open the battery compartment on the
back of the Alarm.
2. Insert the new battery, making sure
it snaps completely into the battery
terminals and cannot be shaken loose.
3. Close the battery compartment, then
test the battery back-up by pressing the
4. Plug the CO Alarm into the outlet.
The battery back-up is designed to
provide emergency power to the CO Alarm
for 7 days. Actual back-up time depends on
the strength (freshness) of the battery.
The battery back-up will not work unless a
good battery is properly installed.
Install the 9V battery to activate
the battery back-up.
Plug the Alarm into a standard
120V unswitched outlet.
Test the CO Alarm.
USING THE SILENCE FEATURES
The Silence Feature is intended to temporarily silence your CO Alarm’s 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.
To Activate the Silence Feature: press and hold the Test/Silence button
until the horn is silent.
Once you activate the Silence Feature: the Silence cycle will last
approximately 4 minutes.
If CO levels drop below alarm levels after 4 minutes, the unit will return
to normal operation and remain silent.
If CO levels do not drop below alarm levels, the unit will alarm again.
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.
NEVER disconnect your CO Alarm to silence the horn. Use the Silence
Feature. Unplugging the CO Alarm and removing the batteries removes
SILENCING THE LOW BATTERY WARNING
This silence feature can temporarily quiet the low battery warning “chirp” for
up to 8 hours without having to remove the battery. You can silence the low
battery warning “chirp” by pressing the Test/Silence button on the alarm cover.
Once the low battery warning “chirp” silence feature is activated, the unit
continues to flash the red light once a minute for 8 hours. After 8 hours, the
low battery “chirp” will resume. Replace the battery 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.)
If you cannot silence the low battery warning, replace your battery
TESTING AND MAINTENANCE
You can test this CO Alarm by pressing the Test/Silence button on the Alarm
cover until alarm sounds.
During testing, you will hear a loud alarm sequence – 4 beeps, pause, 4 beeps,
If the Alarm ever fails to test properly, replace it immediately.
Products under warranty may be returned to the manufacturer for
replacement. See “Limited Warranty” at the end of this manual.
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.
NEVER use vehicle exhaust! Exhaust may cause permanent damage
and voids your warranty.
To keep the CO Alarm working properly:
Test it every week as described in “Weekly Testing.”
Vacuum the CO Alarm cover at least once a month, using the soft brush
attachment. Never use water, cleaners, or solvents, since they may
damage the unit. Test the Alarm again after vacuuming.
Replace the battery immediately when you hear the “Low Battery
The Low (or Missing) Battery Warning:
The horn will “chirp” once a minute.
IF YOUR CO ALARM SOUNDS
Actuation of your CO Alarm indicates the presence of carbon monoxide
(CO) which can kill you. When your CO Alarm sounds, you must not
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 inves-
tigate 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:
Alarms have various limitations. See "General Limitations of CO Alarms"
“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!
REPLACING THE BATTERY
Choosing a Replacement Battery:
This unit requires one standard 9V alkaline battery. The following alkaline
batteries are acceptable as replacements: Duracell #MN1604 or MX1604;
Eveready “Energizer” 522. You can also use an Ultralife 9 volt lithium battery
#U9VL for longer service life between battery changes. These replacement
batteries are commonly available at local retail stores.
Use only the alkaline or lithium replacement batteries listed. The unit may not
operate properly with other batteries. Never use rechargeable batteries since
they may not provide a constant charge.
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 cause
Household cleaners, aerosol chemicals and other contaminants can affect
the sensor. When using any of these materials near the CO Alarm, make sure
the room is well ventilated.
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.
FREQUENTLY ASKED QUESTIONS
Why doesn’t the Alarm respond when I test it and the POWER/ALARM
light is OFF?
The CO Alarm is not receiving power. It may not be plugged in all the way
and the battery may be missing, low, or dead. Gently push the unit all the
way into the outlet, and make sure the outlet is not controlled by a dimmer
or switch. Check the battery.
Why does the Alarm sound three “chirps” every minute (MALFUNCTION
Make sure the battery is installed correctly. If three “chirps” are heard
every minute, replace the CO Alarm immediately. Units under warranty
can be returned to the manufacturer for replacement. See Warranty for
Why does the alarm sound again about 4 minutes after I used the
CO levels still indicate a potentially dangerous situation. Refer to “If Your
CO Alarm Sounds” for details on how to respond to an alarm. If anyone
is feeling ill, EVACUATE your home immediately.
Why does the CO Alarm sound frequently, but no high levels of CO are
found in an investigation?
The CO Alarm may be improperly located. Try relocating your alarm.
(Refer to “Where to Install CO Alarms.”) If frequent alarms continue, have
home rechecked for potential CO problems. You may be experiencing an
intermittent CO problem.
Reliable Protection, Maximum
Just install the battery, plug
the alarm into a regular outlet,
test, and it’s ready to go!
Battery back-up keeps alarm
working if electricity fails.
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 main-
tained, 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.
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.
After approximately 2-3 weeks the End of Life warning cannot be silenced.
For your records, please record:
Date Purchased: _______________________________
Where Purchased: ____________________________________________
Date Installed: ____________/____________Month/Year
Replace alarm 5 years after installation. Please write the date in the
The alarm will also provide an audible End-of-Life Signal approximately
5 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.