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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.
Based on recommendaons from EN 50292, follow these steps if alarm sounds (4 loud audible
pulses followed by a pause for 5 seconds, repeang):
1. Keep calm and open all doors and windows. Turn off all fuel-burning appliances if possible.
Note: it is possible that outdoor condions could influence domesc CO alarms (bad traffic
polluon 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 connues to sound, even aer being reset (where appropriate), then evacuate
the premises, alerng 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 inhala-
on is suspected.
4. 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
GGAASS SSAAFFEE EENNGGIINNEEEERR''SS PPHHOONNEE NNUUMMBBEERR::