54
GB
Air pressure switch regulation
The air pressure switch has the task of putting the burner into safety or block conditions if the combustion air pres-
sure is missing. This will be calibrated lower than the air pressure value at the burner when this is at nominal flow
rate with 1st flame functioning, verifying that the value of CO does not exceed the value of 10.000 p.p.m.
GW 150 A5 type
Range of calibration 5-150 mbar
Electric circuit function
with pressure rising: 1 NC open, 2 NO close
with pressure dropping: 1 NC close, 2 NO open
Remove the transparent lid and act
on the regulation disc (A)
p
COM
NO
NC
2
1
3
A