First Alert CO3 Handleiding

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INSTALLATION

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.

•For added protection, install an additional CO Alarm at least 20 feet

(6 meters) away from the furnace or fuel burning heat source.

In Mobile Homes:

•Install CO Alarms on inside walls ONLY. Uninsulated outside walls

and roofs of mobile homes often transfer heat and cold from out-

doors. The Alarm should be located at least 6 inches (152 mm) from

all exterior walls and at least 12 inches (305 mm) from supply or

return vents.

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 20 feet (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, dish-

washer, laundry room, utility room or other source of high humidity.

•Inareaswheretemperatureiscolderthan40˚F(4.4˚C)orhotter

than100˚F(37.8˚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 from

reaching the sensors.

•Outside the Mobile Home.

•In direct sunlight.

• 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,

or airplanes. This CO Alarm is specifically designed for residential

use, and may not provide adequate protection in non-residential

applications.

BATTERY OPERATED CARBON MONOXIDE ALARM

WITH SILENCE FEATURE

USER’S MANUAL

Model

CO3-B01

900-00659-001-00 3/26 Printed in MexicoK1

IMPORTANT! 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.

© 2026 Resideo Technologies, Inc. All rights reserved. These products

are manufactured by Resideo Technologies, Inc. and its affiliates. •

Scottsdale,AZ85254•CustomerServiceTeam:(800)323-9005•

www.firstalert.com

INTRODUCTION

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 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 cor-

rect 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 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 work-

ing 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 com-

pliance with Occupational Safety and Health Administration (OSHA)

commercial or industrial standards. Individuals with medical condi-

tions that may make them more sensitive to

carbon monoxide may consider using warning devices which pro-

vide audible and visual signals for carbon monoxide concentrations

under 30 ppm. For additional information on carbon monoxide and

your medical condition contact your physician.

FCC Compliance

This equipment has been tested and found to comply with the limits

for a Class B digital device, pursuant to Part 15 of the FCC rules. These

limits are designed to provide reasonable protection against harmful

interference in a residential installation. This equipment generates, uses

and can radiate radio frequency energy and, if not installed and used

in accordance with the instructions, may cause harmful interference to

radio communications.

However, there is no guarantee that the interference will not occur in a

particular installation. If this equipment does cause harmful interference

to radio or television reception, which can be determined by turning

the equipment off and on, the user is encouraged to try to correct the

interferencebyoneormoreofthefollowingmeasures:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and receiver.

•Connect the equipment into an outlet on a circuit different from that

of the receiver.

•Consult the dealer or an experienced radio or TV technician for help.

Warning:Changesormodificationstotheproduct,notexpressly

approved by Resideo Technologies, Inc. and its Affiliates, could void the

user’s authority to operate the equipment.

This device complies with Part 15 of the FCC Rules. Operation is

subjecttothefollowingtwoconditions:(1)thisdevicemaynotcause

harmful interference, and (2) this device must accept any interference

received, including interference that may cause undesired operation.

HOW YOUR CO ALARM WORKS

GENERAL INFORMATION

•This CO Alarm does not operate without working batteries.

Removing the batteries, or failure to replace them at the end

of their service life, removes your protection.

A CO Alarm measures the CO levels in the air. It will alarm if CO levels

rise quickly (if the heat exchanger on your furnace breaks, for example),

or if CO is consistently present (a slow CO leak on a fuel-burning

appliance).

This Carbon Monoxide Alarm features a permanently installed sensor

andan85dBalarmhorn.Italsohasasilencefeaturetotemporarily

quiet the alarm horn.

THE PARTS OF YOUR CO ALARM

12345

6

LIMITED WARRANTY

First Alert’s limited warranty for safety products can be found by scanning the QR code provided below or visiting https://docs.resideo.com/warranty/first-alert-safety.htm:

GARAGE

SUGGESTED AREAS FOR INSTALLING ADDITIONAL CO ALARMS

BEDROOM

BEDROOM

HALL

LIVING ROOM

KITCHEN

BASEMENT

BEDROOM

REQUIRED TO MEET NFPA RECOMMENDATIONS

INSTALLING THE 9V BATTERY

1. Push and lift the battery door

down to open.

2. Install the 9 volt battery

(included) inside the battery

compartment as indicated.

Make sure the “+” and “–”

ends of each battery are

aligned properly.

3 Ensure battery is securely snapped into terminals by pushing in

direction of arrow in the diagram.

4. Close the battery door.

5. Push and hold the Test/Silence button on the cover until you hear

an acknowledge “chirp”. The alarm horn will sound 4 beeps, a pause,

then 4 beeps. The ALARM (RED) light will flash. The alarm sequence

should last 5-6 seconds. If it does not alarm, make sure the battery

is correctly installed, and test it again.

HOW TO INSTALL YOUR CO ALARM

Read “Where To Install Your CO Alarm” before starting.

Before you start installation, find the pair of self-adhesive labels includ-

ed 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.

IF YOUR CO ALARM SOUNDS

Actuation of your CO Alarm indicates the presence of carbon monoxide

(CO) which can kill you. In other words, when your CO Alarm sounds,

you must not ignore it!

IF THE 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 exit to fresh air—outdoors or by an open door or win-

dow. 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 nor-

mal 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:

____________________________________________________________

Alarms have various limitations. See “General Limitations of CO

Alarms” for details.

USING THE SILENCE FEATURE

• 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 remove the batteries from your CO Alarm to silence the

horn. Use the silence feature. Removing the batteries removes

your protection! See “If Your CO Alarm Sounds”

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 prob-

lem. While the alarm is silenced it will continue to monitor the air for CO.

When CO reaches alarm levels 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 approxi-

mately 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:

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, ker-

osene, 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.

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 dif-

ficult 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. Resideo Technologies, Inc. and its

Affiliates shall not be obligated to pay for any carbon monoxide investi-

gation or service call.

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 nominal fee.

•Make regular visual inspections of all fuel-burning appliances. Check

appliances for excessive rust and scaling. Also check the flame on

the burner and pilot lights. The flame should be blue. A yellow flame

means fuel is not being burned completely and CO may be present.

Keep the blower door on the furnace closed. Use vents or fans when

they are available on all fuel-burning appliances. Make sure applianc-

es are vented to the outside. Do not grill or barbecue indoors, or in

garages or on screen porches.

•Check for exhaust backflow from CO sources. Check the draft hood

on an operating furnace for a backdraft. Look for cracks on furnace

heat exchangers.

•Check the house or garage on the other side of shared wall.

•Keep windows and doors open slightly. If you suspect that CO is

escaping into your home, open a window or a door. Opening

windows and doors can significantly decrease CO levels.

In addition, familiarize yourself with all enclosed materials. Read this

manual in its entirety, and make sure you understand what to do if your

CO Alarm sounds.

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

Humidity (RH). The unit is designed not to alarm when exposed to a con-

stant 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.

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 prob-

lems, 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!

Standards: Underwriters Laboratories Inc. Single and Multiple Station

carbon monoxide alarms UL2034.

AccordingtoUnderwritersLaboratoriesInc.UL2034,Section1-1.2:

“Carbon monoxide alarms covered by these requirements are intended

to respond to the presence of carbon monoxide from sources such as,

but not limited to, exhaust from internal-combustion engines, abnormal

operation of fuel-fired appliances, and fireplaces. CO Alarms are intended

to alarm at carbon monoxide levels below those that could cause a loss

of ability to react to the dangers of Carbon Monoxide exposure.” This CO

Alarm monitors the air at the Alarm, and is designed to alarm before CO

levels become life threatening. This allows you precious time to leave

the house and correct the problem. This is only possible if Alarms are

located, installed, and maintained as described in this manual.

GasDetectionatTypicalTemperatureandHumidityRanges: The CO

Alarm is not formulated to detect CO levels below 30 ppm typically.

UL tested for false alarm resistance to Methane (500 ppm), Butane (300

ppm), Heptane (500 ppm), Ethyl Acetate (200 ppm), Isopropyl Alcohol

(200 ppm) and Carbon Dioxide (5000 ppm). Values measure gas and

vapor concentrations in parts per million.

AudibleAlarm:85dBminimumat10feet(3meters).

TESTING & MAINTENANCE

WEEKLY TESTING

•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.

•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.

Push and hold the Test/Silence button on the cover until you hear an

acknowledge “chirp”. The alarm horn will sound 4 beeps, a pause, then 4

beeps. The ALARM (RED) light will flash.

The alarm sequence should last 5-6 seconds. If it does not alarm, make

sure fresh batteries are correctly installed, and test it again. If the unit

still does not alarm, replace it immediately.

If the alarm does not test properly:

1. Make sure that fresh batteries are installed correctly.

2. Be sure the Alarm is clean and dust-free.

3. Install a fresh 9 volt battery and test the Alarm again.*

•DO NOT try fixing the Alarm yourself –this will void your warranty!

If the CO Alarm is still not operating properly, and it is still under

warranty, please see “How to Obtain Warranty Service” in the Limited

Warranty. Install a new CO Alarm immediately.

•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.

*For a list of acceptable replacement batteries, see “Regular Maintenance.”

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 once a month, using the soft brush

attachment. Never use water, cleaners, or solvents, since these may

damage the unit. Test the CO Alarm again after vacuuming.

•Replace the battery when the CO Alarm “chirps”about every minute

(the low battery warning).

Thelowbatterywarningshouldlastfor7days,butyoushouldreplace

the battery immediately to continue your protection.

Choosing a replacement battery:

This CO Alarm requires one standard 9 volt battery. The following

batteriesareacceptableasreplacements:DuracellMN1604,Energizer

522, and Ultralife U9VL-J-P. These replacement batteries are commonly

available at local retail stores.

•Always use the exact batteries specified by this User’s Manual. DO

NOT use rechargeable batteries. Clean the battery contacts and also

those of the device prior to battery installation. Install batteries cor-

rectly with regard to polarity (+ and -).

•Please dispose of or recycle used batteries properly, following any

local regulations. Consult your local waste management authority or

recycling organization to find an electronics

recycling facility in your area. DO NOT DISPOSE OF BATTERIES IN

FIRE. BATTERIES MAY EXPLODE OR LEAK.

•Keep battery out of reach of children. In the event a battery

is swallowed, immediately contact your poison control center, your

physician, or the National Battery Ingestion hotline at

202-625-3333 as serious injury may occur.

•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 permanent damage.

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.

CO ALARM

Sensor has detected enough CO to trigger an alarm. Light flashes

rapidly and horn sounds loudly (repeating

4 beeps, pause)

. See “If Your

CO Alarm Sounds” for details. During an alarm, move everyone to a

source of fresh air. DO NOT move the CO Alarm!

DURING TESTING

Light flashes Red in sync with the horn pattern

(4 beeps, pause,

4 beeps)

, simulating a CO Alarm condition.

UNDERSTANDING YOUR CO ALARM

LOW BATTERY WARNING

The light continues to flash (RED) and the horn also “chirps” once

everyminute.Thiswarningshouldlastforupto7days,butyoushould

replace the battery as soon as possible.

ALARM RECEIVING BATTERY POWER

Light flashes every minute. Horn is silent.

CO ALARM REQUIRES SERVICE (MALFUNCTION SIGNAL)

The light flashes (RED) and the horn sounds 3 “chirps” every minute.

CO Alarm needs to be replaced.

CO ALARM HAS REACHED ITS END OF LIFE

The light flashes (RED) and the horn sounds 5 “chirps” every minute.

CO Alarm needs to be replaced.

–

–

TO MOUNT ON THE WALL

Toolsyouwillneed: Pencil, Drill with 3/16” or 5mm drill bit,

Flathead Screwdriver, Hammer.

1. Choose a location on the wall. Do not install the Alarm closer than

4” (102 mm) from where the wall meets the ceiling.

2. Hold the mounting guide template against the wall, and make a

mark inside each keyhole where you will drill your mounting hole as

shown in the diagram below.

3. Use a 3/16” (5 mm) drill bit to drill through the marks you made for

the mounting holes.

4. Insert the plastic screw anchors into the mounting holes until they

are flush with the wall. If necessary, tap them gently with a hammer.

5.Insertthescrewsintotheanchorsuntilthescrewheadis1/8inch

(3 mm) away from the wall.

6. Slide the CO Alarm onto the screws until you feel it click into place.

7.TesttheCOAlarmasdescribedin“WeeklyTesting.”

“ALARM-EXIT 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 disconnect the batteries from the CO Alarm!

Fuel-burningapplianceslike: portable heater, gas or wood burning fire-

place, gas kitchen range or cooktop, gas clothes dryer.

Damagedorinsufficientventing:corroded or disconnected water heat-

er 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.

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 alarm requires one

standard 9 volt battery to operate.

CO Alarms for Solar or Wind Energy users and battery backup power

systems: AC powered CO Alarms should only be operated with true

or pure sine wave inverters. Operating this Alarm with most battery-

powered UPS (uninterruptible power supply) products or square wave

or “quasi sine wave” inverters will damage the Alarm. If you are not sure

about your inverter or UPS type, please consult with the manufacturer to

verify.

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, Resideo Technologies, Inc.

and its Affiliates do 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.

GENERAL LIMITATIONS OF CO ALARMS

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.

POTENTIAL SOURCES OF CO IN THE HOME

REGULATORY INFORMATION FOR CO ALARMS

Printed in Mexico 900-00659-001-00 3/26K1

If the CO Alarm...

Is silent for only 4 minutes,

then starts sounding loudly—4

beeps, pause, 4 beeps, pause

This means...

CO levels are still potentially

dangerous.

If the CO Alarm...

Remains silent after you

pressed the Test/Silence

button

This means...

CO levels are dropping.

CO Alarm goes back into alarm 4 minutes after

you press the Test/Silence button.

CO levels indicate a potentially dangerous

situation.

IF YOU ARE FEELING SYMPTOMS OF CO

POISONING, EVACUATE your home and call

911 or the Fire Department. If not, press the Test/

Silence button again and keep ventilating your home.

The light flashes (RED) and the horn sounds

3 “chirps” every minute.

MALFUNCTION SIGNAL. CO Alarm needs to be

replaced.

CO Alarms under warranty should be returned to

manufacturer for replacement. See “Limited

Warranty” for details.

PROBLEM...THIS MEANS...YOU SHOULD...

The light continues to flash (RED) and the horn

“chirps” once every minute.

Low battery warning.Install 1 new 9 volt battery*.

TROUBLESHOOTING GUIDE

CO Alarm sounds frequently even though no high

levels of CO are revealed in an investigation.

The CO Alarm may be improperly located. Refer

to “Where to Install CO Alarms.”

Relocate your alarm. If frequent alarms continue,

have home rechecked for potential CO problems.

You may be experiencing an intermittent CO

problem.

The light flashes (RED) and the horn sounds

5 “chirps” every minute.

END OF LIFE SIGNAL. CO Alarm needs to be replaced.Immediately replace the CO Alarm.

Ifyouhaveanyquestionsthatcannotbeansweredbyreadingthismanual,callConsumerAffairsat1-800-323-9005.

*Foralistofacceptablereplacementbatteries,see“Page4:RegularMaintenance.”

SILENCING THE LOW BATTERY WARNING

This silence feature can temporarily quiet the low battery warning

“chirp”forupto8hours.Youcansilencethelowbatterywarning“chirp”

by pressing the Test/Silence button. Activation of low battery silence is

acknowledged with a “chirp”.

After8hours,thelowbattery“chirp”willresume.Replace the

batteries as soon as possible; this unit will not operate without battery

power!

If you cannot silence the low battery warning, replace the

batteries immediately.

1 Open door (in back)

2 Battery Compartment (in back)

3 Test/Silence Button

4 POWER/ALARM Light (RED)

5(BehindCover)AlarmHorn:

85dBaudiblealarmfortest,

alarm, and unit malfunction

warning.

CONFORMS TO

UL STD 2034

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.

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

space provided:

_____________/____________Month/Year

The alarm will also provide an audible End-of-Life Signal

approximately 7 years after installation to remind you to replace the unit.

The End-of-Life Signal can be silenced for up to 2 days. Do not unplug

the alarm or remove the batteries until you get replacement.

3

4

1 & 2

5

Product specificaties