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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 (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.
6.2.1
Nozzle
See information on page 19.
6.3
Burner ignition (light oil)
Position the selector 1)(Fig. 32) in "AUTO".
Position the selector 2) in "OIL" to select light oil fuel.
When the limit thermostat (TL) is closed, the "HEAT REQUEST"
3) signal must be switched on.
At first ignition, there is a momentary drop in fuel pressure due to
the filling of the nozzle piping. This lowering of the fuel pressure
1
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20061317
Start-up, calibration and operation of the burner
2
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 35 before the first start-
up.
WARNING
6.2.2
Combustion head
The adjustment of the combustion head already carried out on
page 20 need not be altered unless the 2nd stage delivery of the
burner is changed.
6.2.3
Pump pressure
In order to change pump pressure, act on screw 5)(Fig. 21).
See information on page 19.
can cause the burner to lockout and can sometimes give rise to
pulsations.
Once the following adjustments have been made, the ignition of
the burner must generate a noise similar to the noise generated
during operation.
If a burner lockout occurs, refer to the "Release procedure" given
in the equipment manual supplied.
4
30
GB
3
Fig. 32
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