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Start-up, calibration and operation of the burner
5
5.1
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.
5.2
Operations before start-up
Ensure that the gas supply company has carried out the supply line vent operations, eliminating air or inert gases from the piping.
Slowly open the manual valves situated upstream of the gas train.
Adjust the minimum gas pressure switch (Fig. 22) to the start of the scale.
Adjust the maximum gas pressure switch (Fig. 23) to the end of the scale.
Adjust the air pressure switch (Fig. 24) to the start of the scale.
Minimum gas pressure switch
D3855
Fig. 22
Check the gas supply pressure by connecting a
pressure gauge to the pressure test point 1)(Fig. 25)
of the minimum gas pressure switch: it must be low-
er than the maximum allowed pressure of the gas
train, as shown on the characteristics label.
An excessive gas pressure can
damage the components of the gas
train and lead to a risk of explosion.
DANGER
Bleed the air from the piping of the gas train, con-
necting a plastic tube to the pressure test point
1)(Fig. 25) of the minimum 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 at which
voltage is supplied.
This operation is unnecessary if each of the two
solenoids is equipped with an indicator 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 delivery at
WARNING
the minimum.
6463
WARNING
Maximum gas pressure switch
D3856
Fig. 23
E9331
18
GB
Check the correct working of the adjustment, com-
mand and safety devices.
Air pressure switch
D3854
Fig. 24
1
Fig. 25
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