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8.5
Maintenance position
Access to the combustion head, electrodes and nozzle.
Remove the burner out of the boiler, after loosing the fixing
nut to the flange.
Hook the burner to the flange (1), by removing the blast tube
(2) after loosing the fixing screws (3).
Remove the electrodes assembly (5) from the nozzle holder
(4) after loosing its fixing screw (A, Fig. 19 to page 20).
Screw the nozzle (6).
2
8.6
Air damper adjustment
The settings indicated in the schedule refer to the combustion-
chamber with "zero" depression.
This regulation is purely indicative.
8.7
Electrodes setting
The position of the electrodes cannot be regulat-
ed. In case of failure, check that the measure-
ments as shown on the figure are respected.
WARNING
Before removing or assembling the nozzle, loosen the screw (A,
Fig. 19) and move the electrodes ahead.
20158133
Start-up, calibration and operation of the burner
1
3
Fig. 17
5
6
4
Each installation however, has its own unpredictable working
conditions: actual nozzle output; positive or negative pressure in
the combustion-chamber, the need of excess air, etc.
All these conditions may require a different air damper setting.
4 ± 0.3 mm
D5230
20
GB
A
2 - 2.5 mm
Fig. 18
Fig. 19
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