20053677
24
Start-up, calibration and operation of the burner
5.1
Notes on safety for the first start-up
5.2
Operations before start-up
Ensure that the gas supply company has carried out the sup-
ply 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. 28) to the start
of the scale.
Adjust the air pressure switch (Fig. 31) to the start of the scale.
Purge the air from the gas line.
Fit a U-type manometer (Fig. 26) to the gas pressure test point
on the sleeve.
The manometer readings are used to calculate the MAX.
burner power.
Before starting up the burner it is good practice to adjust the gas
train so that ignition takes place in conditions of maximum safe-
ty, i.e. with gas delivery at the minimum.
5.3
Burner firing
Having completed the checks indicated in the previous heading,
the pilot of the burner should fire.
If the motor starts but the flame does not appear and the flame
safeguard goes into lock-out, reset and wait for a new firing at-
tempt.
Pilot adjustment has been illustrated on Fig. 12, page 18.
Having adjusted the pilot, reconnect the main valve and ignite the
main flame; it might require several attempts to purge the air from
the gas lines or to adjust the valve with little gas.
Once the burner has fired, now proceed with calibration operations.
5
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.
D2265
Fig. 26
