Wega 1GR Series, Use And Maintenance Manual

Page: 28 / 68

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of
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TECHNICIANS manual
5.9.4 Gas adjustment
To perform the adjustment of the gas proceed as
follows:
1.
Switch on the gas system;
2. remove the locknut (
A
) and loosen the regulator
screw (
B
) by 2 turns;
3. act on the regulator pin (
C
) in order to have the
maximum opening for the flow of gas;
4. wait for boiler pressure to reach 1.4 bar (see boiler
gauge);
5. act on the regulator pin (
C
) and turn it clockwise
until the burner flame is barely visible (pilot flame)
and enough to maintain the thermocouple active;
check the minimum pressure through a gauge
located on the joint (
D
);
6. wait for the pressure in the boiler to reduce down
to 1 bar (see boiler pressure gauge);
7. act on the adjustment screw (
B
) turning it clockwise
until the flame is up to maximum;
8. tighten the locknut (
A
) to lock the screw of the
regulator (
B
);
9. wait for the operating pressure of the boiler indi-
cated on the pressure gauge of the machine, to
reach the working value of about 1.1-1.3 bar.
C
D
A
B
If you want to increase or decrease operating pressure
in the boiler, proceed as above, varying the parameters
as follows:
TO DECREASE PRESSURE
t
set the minimum to 0.9 bar and the maximum to 1.3
bar. You will obtain pressure in the boiler of about
1.0 - 1.2 bar.
TO INCREASE PRESSURE
t
adjust the minimum to 1.1 bar and the maximum
to 1.5 bar. You will obtain a pressure in the boiler
of 1.2 - 1.4 bar (this is the maximum recommended
pressure limit).
To check the pressure at the inlet of the injector, con-
nect a pressure gauge to the connection (
D
).
The gas system is useful in heating the water in the boiler. It does
not, except in special cases, substitute the electrical heating
system, but rather works along with it. For machines with levers,
operation may be either electric or gas.