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To adjust the burner output of the 1° and 2° stage,
respect the following recommendations:
–
the burner output ration between the 1° and 2°
stage should be maximum 1 : 2, and if this ra-
WARNING
tio is exceeded the valve seal control will have
to be used.
–
In any event, the minimum burner output in
the 1° stage should not be less than the value
indicated in the firing rate.
5.10
Gas feeding
Explosion danger due to fuel leaks in the pres-
ence of a flammable source.
Precautions: avoid knocking, attrition, sparks and
heat.
Make sure the fuel interception tap is closed be-
fore performing any operation on the burner.
5.10.1 Gas feeding line
1
D4161
Key (Fig. 16)
1
Gas input pipe
2
Manual gate
(the responsibility of the installer)
3
Gas pressure gauge (the responsibility of the installer)
4
Filter
5
Gas pressure switch
6
Safety valve
7
Pressure stabiliser
8
1st and 2nd stage adjustment valve
M1 Gas-supply pressure test point on the pressure switch
M2 Pressure coupling test point
Installation
2
3
M1
4
D1777
The fuel supply line must be installed by qualified
personnel, in compliance with current standards
and laws.
WARNING
5
6
7
8
17
GB
Micrometric screws
Fig. 15
M2
Fig. 16
20063680
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