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Start-up, calibration and operation of the burner
6.7
Adjustments prior to ignition (gas)
Combustion head adjustment is already described on page 21.
In addition, the following adjustments must also be made:
–
Slowly open the manual valves situated upstream of 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.
–
Purge the air from the gas line.
We recommend using a plastic tube routed outside the
building and to purge air until gas is smelt.
–
Fit a U-type pressure gauge or a differential pressure gauge
(Fig. 37), 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. L.
–
Connect two lamps or testers to the two gas line solenoid
valves to check the exact moment in which voltage is
supplied.
This operation is not required if each of the two solenoid
valves is equipped with a pilot light that signals voltage
passing through.
6.8
Burner start-up (gas)
Turn off the remote controls and set the switch 1)(Fig. 36 on
page 30) to “MAN”.
As soon as the burner starts, check the direction of rotation of the
fan impeller, looking through the flame inspection window
22)(Fig. 6 on page 11).
Check that the lamps or testers connected to the solenoid valves,
or the pilot lights on the solenoid valves, indicate that no voltage
is present.
If they indicate the presence of voltage, stop the burner
immediately and check the electric connections.
CAUTION
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 the minimum.
Fig. 37
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