PENSOTTI PCH 50B-H, Instruction Manual

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MAINTENANCE INSTRUCTIONS
54
5.6 Regulating the gas valve offset
When replacing the gas valve, it is necessary to regulate the offset on
the new gas valve to guarantee a correct operation of the boiler.
Instructions as follows:
Fig. 1
– Disconnect the silicon pipe from its connection
i
onto the venturi air intake point.
Fig. 2
– Connect that end of the silicon pipe to a ‘T’ connection T
and
bring the end of another silicon pipe from the same ‘T’ connection to
the venturi air intake point
i
.
Insert a third silicon pipe on the free connection of the ‘T’ and connect
its end to the negative point
-
of a gas pressure manometer.
Fig. 3
– Unscrew the pressure
P
point screw and connect
there the pipe that goes to the positive point
+
of the gas pressure
manometer.
Switch the boiler On at the minimum power. The manometer should
read a value of +0,02 mbar ; if you read a different value, proceed as
follows (Fig.4)
Fig. 4
– Remove the protection cover
tp
of the gas valve and
adjust plastic screw
v
with a screwdriver to modify the value
on the manometer and to bring it to +0,02 mbar .
Once the regulation is completed,
disconnect pipes and restore original boiler
configuration.
Fig. 1
Fig. 2
T
-
+
Fig. 3
Fig. 4
i
P