53
GB
Assembly and regulation of the leak-tightness pressure switch
Gas and air pressure switch adjustment
8)
Minimum gas pressure pressure switch
The gas minimum pressure pressure switch prevents burner start-up of stops it if it is functioning. If the gas pres-
sure is not the minimum envisioned, it must be calibrated at 40% lower than the value of the gas pressure, which
functions with maximum flow rate.
DG40VC type
Range of calibration 5-40 mbar
p
COM
NO
NC
2
1
3
Remove the transparent lid and act
on the regulation disc (A)
A
10
20
30
40
GW50A5 type
Range of calibration 5-50 mbar
Remove the transparent lid and act
on the regulation disc (A)
A
ASSEMBLY
Remove the cap from the box in the da-
shboard and insert the cable connecting
the pressure switch supplied.
Connect the 2-pole male cable connector
2-pin female CT (see diagram) are pre-
sented in the dashboard wiring burner.
B Insert the cable clamp supplied with
the box dashboard.
Connect the C connector to the pressure
leak test (see “VALVES UNIT”).
A
B
C
REGULATION
The aim of this pressure switch is to check the leak-tightness of the gas valves. If gas pressure decreases during
the leak-tightness test, it means that there is a leak of gas.
The pressure switch setting value must be the 50% of the gas supply value.
