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8. What to do if Your Alarm Sounds!
Carbon Monoxide Alarm Procedure
WARNING: CARBON MONOXIDE ALARM ACTIVATION INDICATES THE PRESENCE OF CARBON MONOXIDE (CO) AT HIGH
CONCENTRATIONS WHICH CAN KILL YOU.
Based on recommends from EN 50292, follow these steps if alarm sounds (4 loud audible pulses followed by a pause for 5 seconds):
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! If the alarm is sounding,
pressing the test/reset button will terminate the alarm. If the CO condition that caused the alert in the first place continues, the
alarm will reactivate. If the unit alarms again, it is sensing high levels of CO which can quickly become a dangerous situation.
CAUTION: If there is any question as to the cause of an alarm it should be assumed that the alarm is due to dangerous levels of
carbon monoxide and the dwelling should be evacuated.
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