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MODEL CO5120PDB—USER’S MANUAL

AC POWERED CARBON MONOXIDE ALARM 
WITH BATTERY BACK-UP AND 
DIGITAL DISPLAY

M06-1060-000  08/01

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.

Model

CO5120PDB

120VAC 60 Hz 0.09A

FEATURES

This CO Alarm is designed to be hard-wired and
mounted on any standard size junction box, up to 4”
size. 120V AC power to the junction box must not be
controlled by a dimmer or switch (other than a circuit
breaker.)

This CO Alarm samples the air and takes a new read-
ing 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). 

General features:

This Alarm features a permanently

installed sensor, a red indicator light (LED), and an 
85 dB alarm horn.

9V Battery Back-Up.

If AC power is interrupted, 

the CO Alarm will continue to operate for a short 
time, provided the 9V battery is fresh and correctly
installed.

Silence Feature.

The Silence feature temporarily 

quiets the alarm.

Low Battery Silence Feature.

Temporarily silences

the Low Battery Warning “chirp” for up to 8 hours if
AC power is present.

Digital Display.

Shows levels of CO, measured in

parts per million present and any stored peak levels.

Malfunction Warning.

This unit performs 

self-diagnostic tests approximately every second.
If the alarm malfunctions, it should be replaced 
immediately.

Summary of Contents for CO5120PDB

Page 1: ...g 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 General features This Alarm features a permanently installed sensor a red indicator light LED and an 85 dB alarm horn 9V Battery Back Up If AC power is interrupted the CO A...

Page 2: ...he AC power fails the battery back up will power the alarm for at least 20 hours provided the 9V battery is fresh and correctly installed TABLE OF CONTENTS Chapter 1 Introduction Inside Cover Basic Safety Information Inside Cover How Your CO Alarm Works 1 Understanding Your CO Alarm 2 Using the CO Memory 4 CO Alarm Specifications 5 Chapter 2 Installation 6 Where to Install CO Alarms 6 Where NOT To...

Page 3: ...y 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 Disconnect AC power before changing battery Shock hazard exists if AC power is m...

Page 4: ...ight continuously Horn Sounds loudly 4 beeps pause 4 beeps pause Display Flashes 888 briefly POWER Flashes once ALARM Light per second WHAT YOU SEE AND HEAR UNDER DIFFERENT CONDITIONS During a power failure in battery back up Horn Chirps briefly Display The word bat is displayed POWER Flashes once a ALARM Light minute When the electricity comes back on Horn Chirps briefly Display Dash appears by R...

Page 5: ...lashes once a ALARM Light minute What You See and Hear Under Different Conditions continued WHAT YOU SEE AND HEAR IF CO IS DETECTED Pre Alarm Levels Horn Silent Display Shows CO levels detected in ppm POWER Shines ALARM Light continuously Alarm levels of CO are detected Over 70 ppm Horn Sounds loudly 4 beeps pause 4 beeps pause This sequence repeats for as long as the unit is in alarm Display Show...

Page 6: ...The CO Memory Feature lets you check the highest level of CO recorded To check CO Memory 1 Press and release the Test Silence Scroll button until dash scrolls to MEMORY 2 Press and hold Test Silence Scroll button to display Memory CO level To clear CO Memory 1 Press and release the Test Silence Scroll button until the dash scrolls to CLEAR MEMORY 2 Press and hold the Test Silence Scroll button unt...

Page 7: ...lay shows Err Dimensions 5 4 diameter approx Supply Voltage 120VAC 60Hz 0 09A During Alarm Repeating alarm horn pattern 4 beeps pause 4 beeps pause Stand alone unit red light LED flashes once per second Interconnected series red light LED flashes once per second on the Initiating alarm The red light LED on all other alarms will shine continuously Warranty 5 year limited warranty Standards Underwri...

Page 8: ...ion 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 For added protection install an additional CO Alarm at least 20 feet 6 meters where possi ble away from the furnace or fuel burning heat source In smaller homes or in manufactured homes and RV s where this distance cannot be maintained install the Alarm as far ...

Page 9: ...ay shorten component or battery life In turbulent air like near ceiling fans or open win dows Blowing air may prevent CO from reaching the sensors 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 ...

Page 10: ... pin from the mount ing bracket Continued on next page The optional locking features are designed to pre vent unauthorized removal of the battery or alarm It is not necessary to activate the locks in single family households where unauthorized battery or alarm removal is not a concern These CO Alarms have two separate locking features one locks the battery compartment and the other locks the CO Al...

Page 11: ...ery from CO Alarms with battery back up Finally press and hold the test button for 5 10 seconds to discharge the branch circuit 1 Remove the CO Alarm from the mounting bracket If the unit is locked to the bracket see the section To Deactivate the Locking Feature 2 Disconnect the power connector by gently prying it away from the back of the CO Alarm 3 Insert a flathead screwdriver under the head of...

Page 12: ...T LOCK ELECTRICAL SHOCK HAZARD Turn off the power to the area where the CO Alarm is installed before removing it from the mounting bracket Failure to turn off the power first may result in serious elec trical shock injury or death Always discharge the branch circuit before servic ing an AC or AC DC CO Alarm First turn off the AC power at the circuit breaker or fuse box Next remove the battery from...

Page 13: ...rate If the AC power fails the battery back up will power the Alarm for a short time if the 9V bat tery is fresh and correctly installed If AC power fails and the battery is dead or missing the Alarm cannot operate BEFORE YOU BEGIN INSTALLATION 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 qualif...

Page 14: ...ILING MOUNTING 1 Remove the mounting bracket from the base Position the screw slots on the mounting bracket over the screws in the junction box Tighten the screws 2 Using wire nuts connect the power connector to the AC power Connect the white wire on the power connector to the neutral wire in the junction box Connect the black wire on the power connector to the hot wire in the junction box Tuck th...

Page 15: ...ector into back of the unit 5 Position the base of the Alarm over the mounting bracket so display is rotated approximately 30º left of center Turn the unit clockwise right until display is horizontal and the unit is in place 6 Make sure CO Alarm is secured to mounting bracket 7 If you are only installing one unit restore power to the junction box ELECTRICAL SHOCK HAZARD Do not restore power until ...

Page 16: ...senses CO When power is interrupted only the AC DC units in the series will continue to send and receive signals AC powered CO Alarms will not operate Interconnect units within a single family residence only Otherwise all households will experience unwanted alarms when you test any unit in the series Interconnected units will only work if they are wired to compatible units and all requirements are...

Page 17: ...o meet any of the above requirements could damage the units and cause them to malfunction removing your protection 3 Using wire nuts connect the power con nector to the AC power Connect the white wire on the power connector to the neutral wire usually white in the junction box Connect the black wire on the power connector to the hot wire usually black in the junction box Connect the violet wire on...

Page 18: ...ec tor to the interconnect wire in the junction box Repeat for each unit you are interconnecting Never connect the hot or neutral wires in the junction box to the violet interconnect wire 5 Plug the power connector into the back of the CO Alarm 6 Position the base of the Alarm over the mounting bracket so display is rotated approximately 30º left of center Turn the unit clock wise right until disp...

Page 19: ...n the number of your local emergency service here ________________________________________ 3 Immediately move everyone to fresh air out doors 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 Al...

Page 20: ...y 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 Alarm level it 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 Silence cycle will last approximately 4 minutes To silence an in...

Page 21: ... the series were exposed to alarm levels of carbon monoxide The Latching Alarm Indicator stays ON until you clear it so it can alert you to a CO Alarm that occurred while you were away from home even though CO present in the air has dropped below alarm levels GARAGE BEDROOM BEDROOM HALL LIVING ROOM KITCHEN BASEMENT BEDROOM LATCHING ALARM Unit was exposed to alarm levels of CO LATCHING NOT ACTIVATE...

Page 22: ...rm DO NOT expose the Alarm to strong fumes such as painting or fumigating THE LOW OR MISSING BATTERY WARNING NOTE You should replace the battery immediately to continue your protection LOW BATTERY SILENCE FEATURE If AC power is on press the Test Silence button to silence the low battery chirp for up to 8 hours The alarm will continue to operate as long as AC power is supplied However replace the b...

Page 23: ...e 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 dam age 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 se...

Page 24: ... 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 f...

Page 25: ... of all fuel burn ing 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 ...

Page 26: ...es exposure to CO over time It alarms if CO levels are extremely high in a short peri od 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 e...

Page 27: ...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 Sounds for details on how to respond to an alarm If anyone is feeling ill EVACU ATE your home immediately and call 911 If you have any questions that cannot be answered by reading this manual call Consumer Affairs 1 800 323 9005 CO Alarm sounds ...

Page 28: ...cently 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 ...

Page 29: ...27 ...

Page 30: ...rricanes and tornadoes or any batteries that are included with this unit BRK shall not be liable for any incidental or conse quential damages caused by the breach of any express or implied warranty Except to the extent pro hibited by applicable law any implied warranty of merchantability or fitness for a particular purpose is limited in duration for to the duration of the above warranty Some state...

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