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5
Start-up, calibration and operation of the burner
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-
tions of the laws in force.
WARNING
5.2
Adjustments prior to ignition (light oil)
It is recommended to adjust first the light oil burner
and then the gas burner.
Carry out the fuel change with burner off.
WARNING
The optimum calibration of the burner requires an analysis of the
flue gases at the boiler outlet and interventions on the following
points.
5.2.1
Combustion head setting
The setting of the combustion head depends exclusively on the
maximum delivery of the burner.
See information on page 21.
In case of high altitude site, head setting must refer to the "correct-
ed capacity" according procedure described at page 10.
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. 22, page 24.
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.
5.4
Burner calibration
The optimum calibration of the burner requires an analysis of the
flue gases at the boiler outlet.
Adjust successively:
firing output
Maximum burner output
Minimum burner output
Intermediate outputs between low and high fire
Air pressure switch
Minimum gas pressure switch
Start-up, calibration and operation of the burner
33
Check the correct working of the adjustment, com-
mand and safety devices.
WARNING
Refer to paragraph "Safety test - with gas ball
valve closed" on page 39 before the first start-
up.
WARNING
5.2.2
Nozzle
See information on page 22.
5.2.3
Pump adjustment
No settings are required for the pump, which is set to 290 PSI by
the manufacturer. This pressure must be checked and adjusted (if
required) after the burner has been ignited.
The only operation required in this phase is the application of a
pressure gauge on the appropriate pump attachment.
5.2.4
Air damper adjustment
The first time the burner is fired leave the factory setting unchanged
for both low and high fire operation.
GB
20095042
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