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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-
tions of the laws in force.
WARNING
6.2
Adjustments prior to ignition
Combustion head adjustment has already been already described
in the section "Combustion head adjustment" on page 25.
In addition, the following adjustments must also be made:
open manual valves upstream from the gas train.
Adjust the minimum gas pressure switch to the start of the scale.
Adjust the maximum gas pressure switch to the end of the scale.
Adjust the air pressure switch to the start of the scale.
Adjust the pressure switch for the leak detection control
(PVP kit)(Fig. 38 on page 54) according to the instructions
supplied with the kit.
Purge the air from the gas line.
We recommend using a plastic tube routed outside the build-
ing and to purge air until gas is smelt.
Fit a U-type pressure gauge or a differential pressure gauge
(Fig. 28), with socket (+) on the gas pressure of the pipe
coupling and (-) in the combustion chamber.
The manometer readings are used to calculate MAX burner
output using the Tab. J.
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.
6.3
Burner start-up
Electrically power the burner using the disconnecting switch
on the boiler panel.
Close the thermostats/pressure switches and set the switch of
Fig. 29 to "1/ON".
Make sure that the lights or testers connected to
the solenoids, or the pilot lights on the solenoids
themselves, indicate that no voltage is present.
If voltage is present, stop the burner immediately
DANGER
and check the electrical connections.
As the burner is not fitted with a device to check the sequence of
the phases, it may be that the rotation of the motor
is incorrect.
As soon as the burner starts up, go in front of fan motor cooling
fan and check it is rotating anticlockwise or else in the direction
of the arrow shown in the diagram Fig. 4.
If this is not the case:
–
put the switch of Fig. 29 to "0/OFF" and wait until the control
box carries out the switching off phase;
–
disconnect the burner form the electrical supply.
Invert the phases on the three-phase power sup-
ply.This operation must be carried out with the
electrical supply disconnected. Follow the "Start-
up procedure" on page 40.
DANGER
Start-up, calibration and operation of the burner
Check the correct working of the adjustment, com-
mand and safety devices.
WARNING
Before igniting the burner, see the paragraph
"Safety test - with gas ball valve closed" on
page 51.
WARNING
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
20069491
20076576
31
GB
Fig. 28
Fig. 29
20107195
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