Kidde K5CO Instructions for use

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User and Installer Guide
Battery Carbon Monoxide Alarms
Quick Start Instructions
included at the back of
this User Guide
BS EN 50291-1:2018
LICENSE NO. KM 738897
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Alarm Operate Fault
Move to Fresh Air
Carbon Monoxide Alarm
PPM of CO displayed
Lb= Low Battery
End= End of Unit Life
MODEL: K5DCO
Alarm
Move to
Fresh Air
Operate Fault
Carbon M onox ide Al arm
Model: K5CO
Model: K5DCO
P/N: K5CO-7201-01
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MODEL: K5DCO

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Thank You for Purchasing this Kidde Alarm
Powered by two AA batteries, these models include a digital display (model K5DCO only), and a Reset
function to temporarily silence nuisance alarms.
Teach children how to respond to the alarm and that they should never play with the unit. This alarm is
designed to detect carbon monoxide from any source of combustion in a residential environment. It is not
designed for use in caravans, motor homes or boats.
NOTE: Please thoroughly read this user guide and save the document for future reference and to pass on
to any subsequent owner.
IMPORTANT: Additional markings can be found on the back of the unit.
The manufacturer recommends replacing this alarm ten years from the install date on the side of alarm.
Model: ______________________________
Date Code (on side): ____________________
Date of Purchase: ______________________
Where Purchased: ______________________
Date to Replace: ________________________
Product Support: 0800 917 0722
Please write down the below information
and have this at hand when you call.
ENVIRONMENTAL PROTECTION
Waste electrical products should not be disposed of with household
waste. Please recycle where facilities exist. Check with Local Authority
or Supplier for recycling advice.
Model: ______________________________
Date Code (on side): ____________________
Date of Purchase: ______________________
Where Purchased: ______________________
Date to Replace: ________________________

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Contents
1. Carbon Monoxide Alarm: What To Do When the Alarm Sounds.................................................................................... 4
2. Other Alarm Visual and Audible Indicators.................................................................................................................................... 5
3. Troubleshooting Guide.............................................................................................................................................................................. 6
4. Introduction, Product Features and Specifications.................................................................................................................. 7
5. Limitations of CO Alarms........................................................................................................................................................................ 9
6. Recommended Locations for Alarms..............................................................................................................................................10
7. Locations to Avoid.......................................................................................................................................................................................11
8. Installation.........................................................................................................................................................................................................12
9. Operation and Testing............................................................................................................................................................................. 13
10. Recognizing Nuisance Alarms............................................................................................................................................................. 14
11. Battery ................................................................................................................................................................................................................ 15
12. General Carbon Monoxide (CO) Information............................................................................................................................. 16
13. Cleaning Your Alarm.................................................................................................................................................................................. 18
14. Service and Warranty................................................................................................................................................................................. 19
Quick Start Instructions .......................................................................................................................................................................... 20

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1. Carbon Monoxide Alarm: What To Do When the Alarm Sounds
The carbon monoxide (CO) alarm pattern is four quick beeps repeating every 5 seconds. The red LED blinks in sync
with the beep pattern. The digital display on model K5DCO will show the PPM level of CO detected.
WARNING: CARBON MONOXIDE ALARM ACTIVATION INDICATES THE PRESENCE OF CARBON
MONOXI O AT HIGH CONCENTRATIONS WHICH CAN KILL YOU.
Based on recommendations from EN 50292, follow these steps if alarm sounds:
1. Keep calm and open all doors and windows. Turn off all fuel-burning appliances if possible. Note: it is possible
that outdoor conditions could influence domestic CO alarms (bad traffic pollution in cold weather, for
example). In these circumstances, the level of indoor CO might actually increase when doors and windows
are opened.
2. If the alarm continues to sound, even after being reset (where appropriate), then evacuate the premises,
alerting other occupants to the risk. Leave doors and windows open. Do not re-enter the premises.
3. Get medical help for anyone suffering the effects of CO poisoning, and advise that CO inhalation is suspected.
4. Call Gas Emergency Services: 0800 111 999, or your local Gas Safe Registered Engineer:
PHONE NUMBER:
Never restart the source of the CO problem until it has been corrected.
Never ignore the sound of the alarm!
NOTE: See Section RECOGNIZING NUISANCE ALARMS, for nuisance alarm situations.

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2. Other Alarm Visual and Audible Indicators
Operational Mode Visual Indications Audible Indications Action/Note:
Normal (standby) Green LED blinks approx every
30 sec.
Test (button press when
no alarm condition is
present) Red LED blinks in sync with beep
pattern.
Green and amber LEDs illuminate.
Model K5DCO digital display will
show 3 dashes and then “888”.
4 loud pulses, a pause,
4 loud pulses.
Single beep
Perform test button press
once a week to verify proper
alarm operation.
CO Alarm Memory (unit
has experienced a CO
alarm event or 100 ppm
or more CO within the
last 14 days)
Red LED blinks every 60 sec. None. Model K5CO: Push button to
clear Alarm Memory.
Model K5DCO: Push Test/
Reset while the Peak Level
button is depressed to clear
Alarm Memory.
Peak Level CO
K5DCO only
Digital display shows the highest
CO reading between 11 and 999
ppm since the peak level was
reset.*
None. Push test/reset button while
peak level button is depressed
to clear peak level memory.
CO alarm reset Red LED continues to signal the
alarm pattern.
After button push: CO
alarm pattern stops. present or if it experienced a
nuisance situation. Re-alarm
means danger. Move to fresh
air and call 0800 111 999.
* NOTE: CO levels up to 30ppm can occur under normal non-dangerous conditions. Such conditions could include

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3. Troubleshooting Guide
NOTE: If at any time your alarm fails to operate correctly (erratic or low sound, for example), or if you require further
information, please contact customer support at 0800 917 0722.
Trouble Condition Visual Indications Audible Indications Action:
Low Battery Amber LED blinks every
60 sec.
Model K5DCO digital
display will show “Lb”.
Chirp every 60 sec. * Push test button once to silence for 24 hrs.
Note: 30 days after Low Battery begins, the
* Replace batteries as soon as possible.
Fault Mode Amber LED blinks every
30 sec.
Model K5DCO digital
display will show “Err”.
Chirp every 30 sec. * See Cleaning Your Alarm section.
* Push test button once to attempt to reset
the unit.
End of Unit Life Amber LED blinks twice
every 60 sec.
Model K5DCO digital
display will show “End”.
Two chirps every
60 sec.
* Push button once to silence for 24 hrs.
Note: 30 days after End of Unit Life begins, the
* Remove, dispose unit, and replace as soon
as possible.
MCU FailureNone. Constant tone. * Replace alarm.
Stuck Button Amber LED blinks
every 5 sec.
Chirp every 5 sec. * Push button to dislodge it from being stuck.
If button cannot be unstuck, remove, dispose
unit, and replace as soon as possible.
3. Troubleshooting Guide

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4. Introduction, Product Features and Specifications
Introduction
This alarm detects carbon monoxide using an electrochemical cell. Many times throughout this User Guide,
we will refer to Carbon Monoxide as “CO.”
Ten (10) years after the unit was installed, this unit will automatically alert you that it is time to replace the unit.
This is called “End of Unit Life” mode. See Troubleshooting Guide. To help track the life of your alarm, write the
installation date in the space provided on the side of the alarm. A label has been provided that has important
information on what to do in case of a CO alarm. Place the label at eye level on a wall near the alarm after it is
mounted.
Product Features and Specifications:
Temperature Operating Range: -10°C to 45°C
Humidity Operating Range: up to 90% RH non-condensing
Audible Alarm: 85+ dB(A) at 3 m, 3.0 to 3.5 kHz pulsing alarm
Digital Display (K5DCO only)
NOTE: Depending on the ambient condition (temperature, humidity) and the condition of the sensor,
the display readings may vary. The digital readings tolerances are 0-999 ± 30% +15ppm during these
conditions: Ambient: 27°C ± 12°C (80°F ± 10°F), atmospheric pressure ±10%, 40% ± 3% relative humidity
CO Sensor: Electrochemical
Peak Level Memory (K5DCO only)
CO Alarm Reset
Powered by AA batteries
Storage and Transport Conditions: -20° C to +60° C, 5-95%RH (non-condensing)

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Product Features
Gr een,
Pow er LED
Red,
Ala rm LED
Test / Reset
Button
Model: K5CO
Alarm
Move to
Fresh Air
Operate Fault
Carbon Monoxide Alarm
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Alarm Operate Fault
Move to Fresh Air
Carbon Monoxide Alarm
PPM of CO displayed
Lb= Low Battery
End= End of Unit Life
Gr e
Amber,
Fault LED
Amber,
Fault LED
en,
Pow er LED
Red,
Ala rm LED
Test / Reset
Button
Peak Level Button
Digital Display
with digital display
Model: K5DCO
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5. Limitations of CO Alarms
WARNING: PLEASE READ CAREFULLY AND THOROUGHLY
This alarm is not intended to alert hearing impaired individuals.
LIMITATIONS OF CO ALARMS
IMPORTANT: This alarm is designed to detect carbon monoxide gas from ANY source of combustion. It is
NOT designed to detect any other gas. This alarm has not been tested specifically for use in caravans or
boats. Only CO alarms certified to EN50291-2 are fully approved for this purpose.
CAUTION: This alarm will only indicate the presence of carbon monoxide gas at the sensor. Carbon
monoxide gas may be present in other areas. Never restart the source of a CO problem until it has been
fixed. NEVER IGNORE THE ALARM!
WARNING: THIS PRODUCT IS INTENDED FOR USE IN ORDINARY INDOOR LOCATIONS OF
FAMILY LIVING UNITS. IT IS NOT DESIGNED TO MEASURE COMPLIANCE WITH COMMERCIAL
AND INDUSTRIAL STANDARDS. THIS ALARM IS NOT SUITABLE FOR INSTALLATION IN HAZARD
OUS LOCATIONS.
IMPORTANT: THIS CARBON MONOXIDE ALARM IS DESIGNED TO DETECT CARBON MONOXIDE
FROM ANY SOURCE OF COMBUSTION INCLUDING IMPROPER OR MALFUNCTIONING APPLIANC
ES. THE INSTALLATION OF THIS DEVICE SHOULD NOT BE USED AS A SUBSTITUTE FOR PROPER
INSTALLATION, USE AND MAINTENANCE OF FUEL BURNING APPLIANCES INCLUDING APPRO
PRIATE VENTILATION AND EXHAUST SYSTEMS.
This alarm does not prevent CO from occurring, nor can it solve any existing CO problem.
WARNING: THIS DEVICE IS DESIGNED TO PROTECT INDIVIDUALS FROM ACUTE EFFECTS OF
CARBON MONOXIDE EXPOSURE. IT MAY NOT FULLY SAFEGUARD INDIVIDUALS WITH SPECIFIC
MEDICAL CONDITIONS. IF IN DOUBT, CONSULT A MEDICAL PRACTITIONER. INDIVIDUALS WITH
MEDICAL PROBLEMS MAY CONSIDER USING WARNING DEVICES WHICH PROVIDE AUDIBLE AND
VISUAL SIGNALS FOR CARBON MONOXIDE CONCENTRATIONS UNDER 30 PPM.
This alarm has not been investigated for carbon monoxide detection below 50 PPM.
This alarm requires a continuous supply of electrical power – it will not work without power.
WARNING: THIS CARBON MONOXIDE ALARM IS NOT A SUBSTITUTE FOR INSTALLING AND
MAINTAINING AN APPROPRIATE NUMBER OF SMOKE ALARMS IN YOUR HOME. THIS ALARM
WILL NOT SENSE SMOKE, FIRE, OR ANY POISONOUS GAS OTHER THAN CARBON MONOXIDE.
FOR THIS REASON YOU MUST INSTALL SMOKE ALARMS TO PROVIDE EARLY WARNING OF FIRE
AND TO PROTECT YOU AND YOUR FAMILY FROM FIRE AND ITS RELATED HAZARDS.

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6. Recommended Locations for CO Alarms
Note: CO alarms should be installed following the guidance of relevant local standards, such as
EN 50292.
Whether the alarm is wall-mounted or ceiling mounted, place the alarm a horizontal distance of between
1 metre and 3 metres from a fuel burning appliance.
When mounting the alarm on the wall, use an inside wall with the top edge of the alarm at a minimum
of 150 mm below the ceiling. The bottom of the alarm should also be at a level greater than the height
of any door or window.
Locate within hearing distance of bedrooms* and place at sleeping height if a heating appliance is in the
bedroom.
CO alarms in rooms with sloped ceilings should be located on the high side of the room.
Ceiling mounted alarms should be at least 300 mm from any wall.
If there is a partition in the room, locate the alarm on the same side of the partition as the potential source.
* A CO alarm should be installed in all rooms containing a fuel burning appliance. Additional CO alarms
should be installed in rooms where most awake time is spent, in every sleeping area, and on every level of
the home.