
When the CO alarm is activated, pressing the TEST/SILENCE button will silence the alarm sound
for about 10 minutes. The ALARM indicator (red) will keep flashing whilst in CO alarm mode even
when silenced.
NOTE: The audible alarm signal will reactivate 10 minutes after the time the TEST/SILENCE
button is pressed if the concentration of CO surrounding the alarm remains at 50 PPM or greater.
NOTE: The siren cannot be silenced if the concentration of CO detected by the alarm is above
200 PPM.
NOTE: The alarm can only be silenced once when high levels of CO are detected.
WARNING! – Before silencing the CO alarm, you should assume that the alarm has activated because
dangerous levels of carbon monoxide have been detected and the dwelling should be evacuated.
11. CO alarm warning silence
The following symptoms are related to CARBON MONOXIDE POISONING and should be discussed
with ALL members of the household:
The above levels of exposure relate to healthy adults. Levels differ for those at high risk. Exposure to
high levels of carbon monoxide can be fatal or cause permanent damage and disabilities. Many cases
of reported carbon monoxide poisoning indicate that while victims are aware they are not well, they
become so disoriented they are unable to save themselves by either exiting the building or calling for
assistance. Also, young children and household pets may be the first effected. Familiarisation with the
effects of each level is important.
WARNING!-Exposure to high levels of carbon monoxide can be fatal or cause permanent damage
and disabilities.
Mild Exposure: Slight headache, nausea, vomiting, fatigue (often described as "Flu-like"symptoms).
Medium Exposure: Severe throbbing headache, drowsiness, fast heat rate.
Extreme Exposure: Unconsciousness, cardiorespiratory failure, death.
If the device chirps once every 40 seconds, and the FAULT indicator (yellow) is flashing, this indicates
the battery is low.
NOTE: You need to replace the battery as soon as possible when the alarm enters this state.
NOTE: The device will not protect against the risk of carbon monoxide poisoning when the battery
has drained.
5. Low battery warning
If the alarm chirps 3 times every 40 seconds with the Fault indicator (yellow) flashing, it indicates end
of life of the CO alarm.
CAUTION! -When you hear the end-of-life signal please replace the alarm as soon as possible.
6. Endof life warning
Pressing the TEST/SILENCE button will silence this warning for about 9 hours, and the FAULT indicator
(yellow) will continue to flash.
7. Silence end of life warning
If the device activates upon detection of CO, the siren will emit at a lower volume (<85dB) for around 10
seconds, and then increase to a normal volume (>85dB). This will avoid startling home occupants.
9. Alarm volume
To test the device, press the TEST/SILENCE button. You should hear the siren and see a corresponding
ALARM indicator (red) flashing. This will stop when you release the TEST/SILENCE button. The alarm
should make: 4 short beeps followed by a 5 second pause, and will repeat this pattern until the
TEST/SILENCE button is released.
10. Test the device
When the device detects a dangerous level of CO, the siren will activate. The siren pattern will be 4
quick beeps followed by 5 seconds of silence. This cycle repeats so long as a dangerous CO levels are
present. The ALARM indicator (red) will flash with the same pattern.
This signal will repeat until the alarm resets after dissipation of CO or the alarm is manually silenced.
CO alarm sensitivity setting:
Conforms to EN 50291-1:2018 and BS EN 50291-1:2018
30PPM Without alarm before 120 minutes 50PPM Between 60 to 90 minutes
100PPM Between 10 to 40 minutes 300PPM Less than 3 minutes
CAUTION! – Refer to “What to do if the CO alarm sounds” when you hear the sounds of the
CO alarm warning.
DANGER! – If the CO alarm sounds, and it is not being tested, it means the unit is sensing a
dangerous level of CO, THE SOUND OF THE ALARM REQUIRES YOUR IMMEDIATE ATTENTION
AND ACTION.
8. CO alarm warning
NOTE:
After the TEST/SILENCE button is pressed, the alarm sounds and the red alarm light flashes.
This does not indicate that CO is present.
Test the unit weekly! If at any time your unit does not perform as described, replace it immediately.
DO NOT use an open flame to test your alarm, you could damage the alarm or ignite combustible
materials and start a fire.
Due to the volume (85 decibels) of the alarm, always stand an arms-length away from the unit
when testing.
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On initial power up, all three LED indicators (green/yellow/red) will light up briefly and the device
confirms start-up with a beep.
Once the power is on, the power indicator (green) flashes once per second for the first 60 seconds
whilst the device calibrates. Once calibrated the power indicator (green) will flash every 40 seconds
to indicate it is functioning correctly.
1. Start up
The POWER indicator (green) flashes every 40 seconds.
2. Normal operation
If the device chirps twice every 8 seconds, and the FAULT indicator (yellow) is flashing, this indicates
that the device is malfunctioning, which in turn means your device will not detect or respond to CO.
3. Fault warning
When the device is indicating a fault, pressing the TEST/SILENCE button will silence this warning for
about 9 hours, and the FAULT indicator (yellow) will continue to flash.
4. Fault and low battery warning silence
Operation and testing
• The following substances can affect the sensor and may cause false alarms: methane, propane,
isobutene, isopropanol, ethylene, benzene, toluene, ethyl acetate, hydrogen sulphide, sulphur
dioxides, alcohol-based products, paints, thinner, solvents, adhesives, hair sprays, aftershaves,
perfumes, and some cleaning agents.
• Your CO alarm will not be operational and will not monitor for CO levels without a battery.
• This apparatus is designed to protect individuals from the acute effects of carbon monoxideexposure.
It will not fully safeguard individuals with specific medical conditions. If in doubt consult a medical
practitioner.
warning:
Verify the unit's alarm sound and indicators are operating correctly using the TEST/SILENCE button
once a week.
Remove the unit from the wall and clean the alarm cover and vents with a soft brush attachment once
a month to remove dust and dirt.
Never use detergents or other solvents to clean the unit.
Avoid spraying air fresheners, hair spray, or other aerosols near the device.
Do not paint the device. Paint will seal the vents and interfere with the sensor's ability to detect CO.
Never attempt to disassemble the unit or clean inside. This action will invalidate your warranty.
As soon as possible, place the CO alarm back in its proper location to ensure continuous protection from
fire and carbon monoxide poisoning.
When household cleaning supplies or similar contaminants are used, the area should be ventilated.
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CO cannot be seen, smelled or tasted and can be fatal. The build-up of CO in the blood is called the
carboxyhemoglobin (COHb) level and interferes with the body’s ability to supply itself with oxygen.
Depending on the concentration, CO can kill in minutes.
The most common sources of CO are malfunctioning gas appliances used for heating and cooking,
vehicles running in an attached garage, blocked chimneys or flues, portable fuel burning heaters,
fireplaces, fuel powered tools and operating a grill in an enclosed space.
Indications of carbon monoxide poisoning include symptoms similar to the flu, but with no fever.
Other symptoms include dizziness, fatigue, weakness, headache, nausea, vomiting, sleepiness and
confusion.
Everyone is susceptible to the danger of CO, but experts agree that unborn babies, small children,
pregnant women, senior citizens and people with heart or respiratory problems are at the highest
risk for serious injury or death.
Every year a qualified technician should inspect and clean your heating system, vents, chimney, and
flues.
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To keep your CO alarm in good working order, please follow these simple steps:
General Maintenance
Carbon Monoxide (CO) overview
Environmental Protection
Address/Helpline
If you have further technical assistance you can get in touch with our
Technical Helpline on:
+44 (0)3300 249 279
technical.support@bgelectrical.co.uk
(EU) Luceco SE
C/ Bobinadora 1-5
08302 Mataró
SPAIN
Luceco PLC
Stafford Park 1
Telford TF3 3BD
ENGLAND
This symbol is known as the “Crossed-out Wheelie Bin Symbol”. When this symbol is marked
on a product or battery. It means that it should not be disposed of with your general household
waste. Some chemicals contained within electrical/electronic products or batteries can be
harmful to health and the environment. Only dispose of electrical/electronic/battery items in
separate collection schemes, which cater for the recovery and recycling of materials contained
within. Your co-operation is vital to ensure the success of these schemes and for the protection
of the environment.
30PPM Without alarm before 120 minutes
50PPM Between 60 to 90 minutes
100PPM Between 10 to 40 minutes
300PPM Less than 3 minutes
10 years
<20A (average)
<30mA (average)
-10~+40℃, 30~95% non-condensing
-20~+50℃, 10~95% non-condensing
≥85DB at 3m at 3.2±0.5KHz pulsing alarm
About 10 minutes
About 9 hours
Wall of domestic premises
Max. 40 m2within a room
NOTE: This CO alarm is designed to detect carbon monoxide gas from any source of combustion. It is not
designed to detect any other gas.
NOTE: Test the alarm for correct operation using the test facility whenever the batteries are replaced.
CO alarm sensitivity setting
Product life
Standby Current
Alarm Current
Operation Ambient Condition
Storage/Transport Ambient Condition
Alarm Sound
CO Alarm Silence
Other Warning Silence
Installation Location
Detection Range
Type B
3V DC (2 x 1.5V AA)
Electrochemical
EN 50291-1:2018 and BS EN 50291-1:2018
Product specifications
Product standards
Type of apparatus
Power Supply
Sensor of CO
BG Electrical products are guaranteed against faulty materials and workmanship for a period of
10 years from date of delivery: products will be repaired or (at BG Electrical’s discretion) replacements will
be supplied or (at BG Electrical’s discretion) a credit note will be issued. This guarantee is subject to BG
Electrical’s conditions of sale and in particular to the following conditions being met:
Notification of any defect is given to BG Electrical as soon as reasonably practicable after becoming
apparent, and the products then returned to BG Electrical.
The products have only been operated under normal operating conditions and have only been subject to
normal use.
No work (other than normal and proper maintenance) has been carried out to the products without BG
Electrical’s prior written consent.
The products have been assembled, or incorporated into other goods, by a qualified and recognised
electrician and only in accordance with any instructions issued by BG Electrical.
The defect has not arisen from an item manufactured or supplied by a person other than BG Electrical.
This guarantee does not affect any consumer statutory rights.
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Guarantee
Batch Number Explanation
XX (year) XX (month) XX (date) X (serial number)