
Kidde Sealed Baery, Long Life Carbon Monoxide Alarm
EN50291-1 :2010
LicenseNo. KM98848
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 1

1
Contents
1. What is Carbon Monoxide (CO)?
2. Important Safety Informaon
3. What To Do If Your Alarm Sounds
4. Switching on Your CO Alarm
5. Installaon Instrucons – Recommended Locaons
6. Installaon Instrucons – Mounng
7. Using your CO Alarm
Warning Signals, Tesng / Re-seng, LCD read-outs (model 10LLDCO only), Peak Level
Display (model 10LLDCO only)
8. Maintenance of your Alarm
9. Troubleshoong
10. Product Specificaons
11. Warnings and Important Noces
12. Guarantee
13. Environmental Protecon
13. Useful Contact Informaon
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 1

Green,
Power LED
Test / Reset
Button
Model 10LL CO
Model 10LLDCO
Red,
Alarm LED
Green,
Power LED
Red,
Alarm LED
Test / Reset
Button
Peak Level
Button
Digital Display
FAULT
Move to
Fresh Air
ALARM
TEST/RESET
MODEL: 10LLCO
OPERATE
Carbon Monoxide Alarm
EN50291-1:2010
LicenceNo:KM 98848
FAULT
PPMof CO displayed
LB=Low Battery
End=End of Unit Life
Move to
Fresh Air
ALARM
PEAK LEVEL
TEST/RESET
MODEL: 10LLDCO
OPERATE
Carbon Monoxide Alarm
EN50291-1:2010
LicenceNo:KM 98848
Product Features and Specificaons
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 2

3
1. What is Carbon Monoxide?
Carbon monoxide (CO) is a highly poisonous gas with no taste, colour or smell.
Potenal Sources of CO
• Wood-burning stoves
• Gas boilers and fires
• Gas Hobs
• Oil and coal burning appliances
• Portable gas heaters
• Blocked flues and chimneys
• Fumes from integral garages
• Barbecues
This CO alarm is not a substute for the correct maintenance of your
appliances.
Carbon monoxide can be produced from poorly burning appliances
or from blocked flues and chimneys.
If your alarm has sounded and you have venlated the room the CO
may have dispersed before help arrives. It is crucial that the source
of CO is determined and appropriate maintenance carried out.
Carbon monoxide is a cumulave poison. This Kidde alarm is me-weighted – the higher the level of
CO, the sooner it will alarm.
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 3

4
Further informaon for Caravan and Boat Owners
The following can lead to carbon monoxide being produced:
• Using LPG cooking appliances for space heang
• Leaving LPG appliances on overnight
• Barbecues within the boat cabin or near a caravan door (e.g. under an awning)
To be safe, know the possible sources of CO in your home. Keep fuel burning appliances,
chimneys and vents in good working condion. Learn the early symptoms of exposure, and if
you suspect CO poisoning, move outside into fresh air and get emergency help. Your first line of
defence is an annual inspecon and regular maintenance of your appliances. Contact a licensed
contractor or call your local ulity company for assistance.
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 4

5
Alarm levels as defined by EN50291-1:2010
The table below shows the response mes at which your CO alarm will sound;
CO Advice and Informaon
The table below shows the effects of different levels of CO poisoning on the body;
Parts per Million (PPM) of CO Time unl Alarm
50 60 – 90 minutes
100 10 – 40 minutes
300 Must alarm in less than 3 minutes
Parts per Million (PPM) Effects on Adults
100 Slight headache, nausea, fague (flu-like symptoms)
200 Dizziness and headache within 2 – 3 hours
400 Nausea, frontal headache,drowsiness,confusion and rapidheart rate.
Riskto life aer over 3 hours of exposure
800 Severe headaches, convulsions, vitalorgan failures.Death possible within
2 – 3 hours
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 5

6
2. Important Safety Informaon
If you recognise any of the above symptoms consult your Doctor immediately.
Young children, elderly and pets are more suscepble to the dangers of CO.
Your Kidde alarm is designed to detect CO gas. It is not designed to detect smoke, fire
or other gas such natural gas.
This product is intended for use in ordinary family homes. It is not designed to
measure compliance with occupaonal safety and the HSE.
Individuals with certain specific medical condions may need an alarm that operates
below 30ppm. If this applies consult your Doctor.
IMPORTANT: Ensure that all family members are familiar with the symptoms of CO
poisoning and how your alarm works.
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 6

7
3. What to do if Your Alarm Sounds!
Carbon Monoxide Alarm Procedure
WARNING! Acvaon of the alarm indicates the presence of Carbon Monoxide
(CO) which can kill you.
If alarm sounds (4 loud audible pulses followed by a pause for 5 seconds, repeang):
1) Immediately move to fresh air – outdoors or by an open door/window. Do a head count to
check that all persons are accounted for. Do not re-enter the premises nor move away
from the open door/window unl the emergency services responders have arrived, the
premises have been aired out, and your alarm remains in its normal condion.
2) Call Gas Emergency Services: 0800 111 999, or your local Gas Safe Registered Engineer:
Addional telephone numbers are available for solid fuel (HETAS) and oil (Oec) users at the
back of this manual
Never ignore the sound of the alarm! Never restart the source of the CO problem unl it has
been corrected. If the alarm is sounding, pressing the test/reset buon will terminate the
alarm. If the CO condion that caused the alert in the first place connues, the alarm will
reacvate. If the unit alarms again within six minutes, it is sensing high levels of CO which can
quickly become a dangerous situaon.
GGAASS SSAAFFEE EENNGGIINNEEEERR''SS PPHHOONNEE NNUUMMBBEERR::
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 7

8
4. Switching on Your CO Alarm
NOTE: Your CO alarm must be installed by a competent person using the guidance that follows:
1. The alarm is shipped turned off and is acvated the first me the mounng bracket is
aached. To acvate the alarm; for wall-mounng install the mounng bracket using the
instrucons below and slide the alarm unl it snaps into place. For tabletop applicaons
simply slide the bracket onto the unit unl it snaps into place.
2. To test the alarm, press the test buon. The alarm will beep once followed by 4 loud
pulses, then a brief pause and then 4 more pulses, ending with a single beep. The alarm has
a ‘ramp-up’ horn so during the test sequence it will sound more soly, making it more
comfortable for the user. This confirms that the alarm is powered up and working.
3. Check that the green LED flashes at 30 second intervals to show that the alarm has power.
This is easiest to see in a dark area, or with lights switched off.
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 8

9
5. Installaon Instrucons – Recommended Locaons
*It is recommended that at least one Kidde carbon monoxide alarm is installed on each
level of the home.
Recommended Locaons Not Recommended
Place the alarm at least 2 metres from fuel
burning appliances, and not more than 4
metres away
Do not place closer than 2 metres from fuel
burning appliances
Away from draughts, such as doors and
windows
Do not wall-mount close to obstrucons
(e.g. behind curtains, shelving or furniture)
Within hearing distance of bedrooms* If
heang appliance is in the bedroom an
addional alarm should be located within.
Do not fit in dusty, dirty or greasy areas (e.g.
garages or workshops)
If wall-mounng, install at eye-level (approx
1.5m), and at least 30cm from adjoining walls
or ceiling
Do not wall-mount within 30cm of the ceiling
as this is a “dead air” space
If free-standing, the unit should be placed
no more than 1 metre from the ground (to
avoid permanent damage in case accidently knocked)
Avoid humid (bathrooms), cold (< 0°C) or hot
(>40°C) areas and away from sinks
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 9

10
6. Installaon Instrucons – Mounng
THIS ALARM MUST BE INSTALLED BY A COMPETENT PERSON AND IS TO BE INSTALLED
ACCORDING TO THESE INSTRUCTIONS
Wall-mounng
1.
Using bracket as a guide, drill two holes in a wall 7cm (2 3/8”) apart.
2. Insert the two fixings, that are supplied, into the holes.
3. Slide bracket on to screws then ghten.
4. Slide alarm onto base plate to acvate it, and remember to test it.
5. The alarm is tamper-proof and can only be removed using a screw driver.
Free-standing
No more than 1 metre from the floor (to minimise this risk of the alarm being permanently
damaged should it be knocked to the floor from a greater height)
Wall Mounng
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 10

11
7. Using Your Alarm (non-digital version, 10LLCO)
Recognising Alarm Signals and Warnings
Feature What this means Required Acon
Green LED flashes every 30 seconds Normal operaon None
Amber LED flashes every second, beeps every
60 seconds
Low baery If cold allow unit to warm
up for a couple hours then
replace if sll beeping
Two chirps and two red LED flashes every 30
seconds.Amber LED flashing every second.
End of life of the alarm Replace the alarm
Amber LED flashes every second, beep every 30
seconds and green LED blinks error code every
other 30 seconds.
Fault Replace the alarm
Constant tone Malfuncon Replace the alarm
Loud connuous alarm (four loud alarm sounds,
repeated for four minutes, followed by two pat-
terns per minute) with the red LED
Dangerous levels of CO
have been detected
Follow emergency
procedures (see Page7)
Red LED flash every 60 seconds Historical event in last
14 days
Check your appliances
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 11

12
7. Using Your Alarm (non-digital version, 10LLCO)
Tesng
Test your alarm each week by pressing the test buon. It will beep once followed by 4 loud
pulses, then a brief pause and then 4 more pulses, ending with a single beep.
This confirms that the alarm is powered up and working.
Re-seng the Alarm
If the alarm sounds, the test / reset buon will silence the alarm unless it is sll detecng
dangerous levels of CO. The green light will then flash every 30 seconds to indicate that the
alarm has power.
Alarm Memory (non-digital only)
The red LED will flash every 60 seconds to indicate if a CO event has occurred whilst the house has been
unoccupied. This automacally cancels aer 14 days or if the reset buon is pressed.
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 12

13
Digital Screen
Digital
Screen
LED Sound
emied
What this means Required acon
Dot flashes
every 5
second
Green flash every
30 seconds
None Normal operaon.
(LCD will not show
levels < 30ppm)
None
Displays up
to 999
Red LED flashes Full alarm Dangerous levels of CO
has been detected
Follow emergency
procedures (see Page 7)
Shows 3
dashes,
then 888
Red LED flashes
Green and Amber
LED on
1 beep, then 2
sets of 4 beeps,
followed by 1
beep
Successful test or reset
sequence in operaon
None
Amber LED flashes
every second
Chirp every 60
seconds
Low baeries (Lb)
If cold allow unit to warm up
for a couple hours then
replace if sll beeping
Amber LED flashes
every second and green
flashes error code
every other 30 seconds
Chirp every 30
seconds
Fault Replace the alarm
Constant tone Malfuncon Replace the alarm
Two chirps and two red
LED flashes every 30
seconds.Amber LED
flashing every second.
Chirps twice
every 30
seconds
End of Life Replace the alarm
7. Using Your Alarm (for Digital unit only, 10LLDCO)
Addional features for the CO alarm with the digital display screen, model 10LLDCO;
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 13

14
7. Using Your Alarm (for Digital unit only) – Cont’d
Peak Level Display
Press peak level buon to display the highest CO reading between 11 – 999ppm since the
peak level was reset.
This feature is useful to help you to know what levels of CO may have been detected in your
absence so correcve acon can be taken (such as servicing your boiler).
NOTE: The peak level memory is cleared to zero if while holding the peak level buon the test
reset is pressed and released before releasing the peak level.
CO levels up to 30ppm can occur under normal non-dangerous condions. Such condions
could include nearby heavy traffic, starng a vehicle in an aached garage, starng a fire or a
nearby charcoal barbecue.
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 14

15
8. Maintenance of Your Alarm
To keep your alarm in good working order:
• Test every week
• Vacuum regularly to remove dust
• Keep away from solvents or detergents
• Avoid spraying air-freshener, hair-spray near the alarm
• Do not paint the alarm. If decorang or using adhesives close to the alarm, remove it
temporarily
• Keep away from nappy buckets
The following substances can affect the sensor and cause false alarms:
Methane, Propane, Iso-butane, Iso-propanol, Ethylene, Benzene, Toluene, Ethyl
acetate, Hydrogen Sulphide, Hydrogen, Sulphur Dioxide, alcohol based products,
paints, thinners, solvents, adhesives, hair-sprays, aershaves or perfumes and
some cleaning agents.
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 15

16
9. Troubleshoong
Symptom LCD Screen Display (model
10LLDCO only)
Problem Acon Required
Single chirp every 60
seconds. Amber LED
flashes every second
Low baeries
If cold allow unit to warm up
for a couple hours then
replace if sll beeping
Single chirp every 30
seconds with Amber
LED flashes every second.
Alarm fault
Replace alarm
(contact Kidde if sll in
guarantee)
Constant tone
Alarm Alarm malfuncon
Replace alarm
(contact Kidde if sll in
guarantee)
Two chirps and two red
LED flashes every 30
seconds. Amber LED
flashing every second.
End of Life of the alarm Replace the alarm
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 16

17
10. Product Specificaons
Power Sealed in lithium baery
Sensor Electrochemical CO Sensor
Accuracy Depending on the ambient condion (temperature, humidity) and the
condion of the sensor, the alarm readings may vary. The digital readings
tolerances are:
Ambient: 27°C +/- 12°C (80°F +/- 10°F), atmospheric pressure +/- 10%,
40% +/- 3% relave humidity
Temperature Range Operang range: 0°C to 40°C
Humidity Up to 90% non-condensing
Alarm Sound At Least 85dB (A) at 1 metre @ 3.4 +/- 0.5 KHz pulsing alarm
Size and weight Weight: 160g
Dimensions: 118mm x 70mm x 40mm
NOTE: Constant exposures to extreme temperatures or humidity can reduce battery life.
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 17

18
11. Warnings and Important Noces
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.
WARNING:
THIS PRODUCT IS INTENDED FOR USE IN ORDINARY INDOOR RESIDENTIAL AREAS.
IT IS NOT DESIGNED TO MEASURE COMPLIANCE WITH COMMERCIAL AND INDUSTRIAL STANDARDS. THIS ALARM IS NOT SUITABLE FOR INSTALLATION IN HAZARDOUS LOCATIONS . INDIVIDUALS WITH MEDICAL PROBLEMS MAY CONSIDER USING WARNING DEVICES WHICH
PROVIDE AUDIBLE AND VISUAL SIGNALS FOR CARBON MONOXIDE CONCENTRATIONS UNDER
30 PPM.
IMPORTANT:
THIS CARBON MONOXIDE ALARM IS DESIGNED TO DETECT CARBON MONOXIDE
FROM ANY SOURCE OF COMBUSTION INCLUDING IMPROPER OR MALFUNCTIONING
APPLIANCES. THE INSTALLATION OF THIS DEVICE SHOULD NOT BE USED AS A SUBSTITUTE FOR
PROPER INSTALLATION, USE AND MAINTENANCE OF FUEL BURNING APPLIANCES INCLUDING
APPROPRIATE VENTILATION AND EXHAUST SYSTEMS
WARNING:
THIS ALARM WILL NOT WORK WITHOUT POWER. THIS ALARM REQUIRES A
CONTINUOUS SUPPLY OF POWER.
WARNING:
THIS UNIT IS NOT A SMOKE ALARM. IT WILL NOT SENSE SMOKE . FOR EARLY
WARNING OF FIRE YOU MUST INSTALL SMOKE ALARMS.
IMPORTANT: IF ANY FAULT SIGNALS OCCUR, CONTACT THE MANUFACTURER OR SUPPLIER
AND DO NOT CONTINUE USING THE ALARM.
WARNING: THE DEVICE CANNOT WARN AGAINST THE CHRONIC EFFECTS OF EXPOSURE TO
CARBON MONOXIDE OR PROTECT INDIVIDUALS WHO ARE AT SPECIFIC RISK.
WARNING: ALTERING THE ALARM IN ANY WAY MAY LEAD TO A RISK OF ELECTRIC SHOCK OR
PREVENT IT FROM FUNCTIONING CORRECTLY.
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 18

19
12. Guarantee
TEN YEAR LIMITED GUARANTEE
GUARANTEE COVERAGE: THE MANUFACTURER WARRANTS TO THE ORIGINAL CONSUMER PURCHASER, THAT THIS PRODUCT WILL BE FREE
OF DEFECTS IN MATERIAL AND WORKMANSHIP FOR A PERIOD OF TEN (10) YEARS FROM DATE OF PURCHASE. THE MANUFACTURER’S LIABILITY HEREUNDER IS LIMITED TO REPLACEMENT OF THE PRODUCT. REPAIR OF THE PRODUCT OR REPLACEMENT OF THE PRODUCT WITH
REPAIRED PRODUCT AT THE DISCRETION OF THE MANUFACTURER. THIS GUARANTEE IS VOID IF THE PRODUCT HAS BEEN DAMAGED BY
ACCIDENT, UNREASONABLE USE, NEGLECT, TAMPERING OR OTHER CAUSES NOT ARISING FROM DEFECTS IN MATERIAL OR WORKMANSHIP.
THIS GUARANTEE EXTENDS TO THE ORIGINAL CONSUMER PURCHASER OF THE PRODUCT ONLY.
Guarantee Disclaimers: Any implied guarantees arising out of this sale, including but not limited to the implied warranes of descripon,
merchantability and fitness for a parcular purpose, are limited in duraon to the above guarantee period. In no event shall the
Manufacturer be liable for loss of use of this product or for any indirect, special, incidental or consequenal damages, or costs, or expenses
incurred by the consumer or any other user of this product, whether due to a breach of contract, negligence, strict liability in tort or
otherwise. The Manufacturer shall have no liability for any personal injury, property damage or any special, incidental, conngent or
consequenal damage of any kind resulng from gas leakage, fire or explosion. This guarantee does not affect your statutory rights.
Guarantee Performance: During the above guarantee period, your product will be replaced with a comparable product if the defecve
product is returned, postage prepaid, to Kidde Safety Europe Ltd, Mathisen Way, Colnbrook, Slough SL3 0HB, UK. Telephone 01753 685148,
together with proof of purchase date. Please include a note describing the problem when you return the unit. The replacement product will
be in guarantee for the remainder of the original guarantee period or for six months, whichever is longer. Other than the cost of postage, no
charge will be made for replacement of the defecve product. Important: Do not open unit. Opening unit will void guarantee.
Your Carbon Monoxide Alarm is not a substute for property, disability, life or other insurance of any kind. Appropriate insurance coverage
is your responsibility. Consult your insurance agent.
For Guarantee Service: In many cases the quickest way to exchange your CO alarm is to return it to the original place of purchase. If you have
quesons, call the KIDDE customer service department on +44 (0) 1753 685148
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 19

20
13. Environmental Protecon
Waste electrical products should not be disposed of
with household waste. Please recycle where
facilies exist. Check with Local Authority or
Supplier for recycling advice
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 20

21
14. Useful Contact Informaon
Kidde Helpline (UK) 0800 917 0722 / (Ireland) 1 800 818 601
CoGDEM CO Advice Line 0800 1694 457
Emergency No.s Gas Emergency Services 0800 111 999
HETAS (Solid Fuel Emergency) 0845 634 5626
Oec (oil) 0845 658 5080
Kidde Website www.TenYCO.kiddefyrnecs.co.uk
Manufacturer Address Kidde Safety Europe Limited
Mathisen Way
Colnbrook
Berkshire
SL3 0HB
UK
Made in China
P/N: 2539-7201-02
2539-7201-03_10LLCO_10LLDCO:_ 2015.2.9 11:12 AM Page 21