20040559
22
GB
Start-up, calibration and operation of the burner
6.1
Notes on safety for the first start-up
6.2
Adjustments prior to ignition
Combustion head adjustment is already described on page 15.
In addition, the following adjustments must also be made:
open manual valves upline the gas train.
Adjust the minimum gas pressure switch to the start of the
scale (Fig. 21).
Adjust the maximum gas pressure switch to the end of the
scale (Fig. 22).
Adjust the air pressure switch to the start of the scale (Fig. 23).
Purge the air from the gas line.
We recommend using a plastic tube routed outside the build-
ing to purge air until gas is smelt.
Fit a pressure gauge (Fig. 24) to the gas pressure test point
on the pipe coupling. The pressure gauge readings are used
to calculate MAX burner output using Tab. H on page 19.
Connect two lamps or testers to the two gas line solenoid
valves VR and VS, to check the exact moment at which volt-
age is supplied. This step is not needed if either of the two
solenoid valves is equipped with a pilot light signalling volt-
age.
6
Start-up, calibration and operation of the burner
WARNING
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
Check the correct working of the adjustment, com-
mand and safety devices.
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. 21
D3855
Fig. 22
D66
Fig. 23
D3854
+
-
D3986
Fig. 24
