- 35 -
ENGLISH
CALIBRATION OF AIR PRESSURE SWITCH
The air pressure switch places the burner in safety mode or shuts it down should there be a drop in combustion air pres-
sure. It will be calibrated at a pressure below 1st stage rated-flow on-burner air pressure, checking that CO values do not
exceed 10,000 p.p.m..
CALIBRATION OF MINIMUM GAS PRESSURE SWITCH
The minimum gas pressure switch serves to prevent the burner from being started up or to shut it down if the gas pressure
falls below the minimum required level. This setting should be 40% lower than the gas pressure obtained with the burner
operating at maximum delivery.
PRESSURE SWITCH
Type: LGW 3 A2
LGW 10 A2
GW 50 A5
Remove the cover and
adjust dial A
Pressure
connector
CHECKING CONTROL BOX IONIZATION CURRENT
The minimum value of 3 A should be observed,
and large oscillations are to be avoided.
MICROAMPEREMETER CONNECTION
MODEL
Air pressure switch
DUNGS type
Setting range mbars
Gas pressure switch
DUNGS type
Setting range mbars
EM 3 ST-E
604.9010002 0,2 - 3
GW 50 A5
GW 150 A2
GW 150 A5
5 - 50
5 - 150
5 - 120
EM 6N ST-E
A
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