Bticino HC4511/12 Notice De Montage page 57

Signals
56
Detected gas alarm
alarm = acoustic signal +
Note
After the equipment is energised, a short acoustic signal is let
out and all the LEDs stay lit for approximately 1 minute.
During this time lapse, the detector is not detecting gas presence
but is only carrying out a check routine.
METANO
CAUTION
The signal repeater and the
solenoid valve are activa-
ted about 1 minute after the
detector gives the alarm
signal.
CAUTION
You may smell gas befo-
re the detector gives the
alarm. This does not mean
that the detector is not
working properly.