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6
Start-up, calibration and operation of the burner
6.1
Notes on safety for the first start-up
The first start-up of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
WARNING
tions of the laws in force.
6.2
Adjustments prior to ignition
Ensure that the gas supply company has carried
out the supply line vent operations, eliminating air
or inert gases from the piping.
WARNING
Slowly open the manual valves situated upstream from the
gas train.
Adjust the minimum gas pressure switch (Fig. 33) to the start
of the scale.
Adjust the air pressure switch (Fig. 32) to the start of the
scale.
Check the gas supply pressure by connecting a pressure
gauge to the pressure test point 1)(Fig. 26) of the minimum
gas pressure switch: it must be lower than the maximum
allowed pressure of the gas train, as shown on the charac-
teristics label.
20054100
Start-up, calibration and operation of the burner
E9330
Check the correct working of the adjustment, com-
mand and safety devices.
WARNING
An excessive gas pressure can damage the com-
ponents of the gas train and lead to a risk of explo-
sion.
Bleed the air from the piping of the gas train, connecting a
plastic tube to the pressure test point 1)(Fig. 26) of the mini-
mum gas pressure switch. Take the vent tube outside the
building so you can notice the smell of gas.
Connect two lamps or testers to the two gas line solenoids to
check the exact moment in which voltage is supplied. This
operation is unnecessary if each of the two solenoids is
equipped with a pilot light that signals voltage passing
through.
Before starting up the burner, it is good practice to
adjust the gas train so that ignition takes place in
conditions of maximum safety, i.e. with gas deliv-
ery at the minimum.
CAUTION
24
GB
1
Fig. 26
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