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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-
WARNING
tions of the laws in force.
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 pag. 18.
6.3
Burner ignition (light oil)
Position the selector 1)(Fig. 31) 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
S8411
Start-up, calibration and operation of the burner
4
2
Check the correct working of the adjustment, com-
mand and safety devices.
WARNING
6.2.2
Combustion head
The adjustment of the combustion head already carried out on
pag. 19 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. 20).
See information on pag. 18.
6.2.4
Fan damper
Refer to the adjustment of the servomotor on pag. 31.
can cause the burner to lockout and can sometimes give rise to
pulsations.
In the event that the burner locks-out again, refer to chapter
'Faults - Possible causes - Solutions" on pag. 40.
Once the following adjustments have been made, the ignition of
the burner must generate a noise similar to the noise generated
during operation.
29
GB
3
Fig. 31
20040160
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