3.5
Combustion head setting
The combustion head is set in factory.
The settings should be adjusted for the required rating (Fig. 20).
Set the head position by turning the adjustment screw 9)(Fig. 1)
to the value indicated in Tab. A.
• Distance between 2 graduations = 3 mm;
• 1 full turn = 1 mm.
3.6
Air damper adjustment
The air damper is set in factory.
This regulation is purely indicative. Each installation however,
has its own unpredictable working conditions: actual nozzle ou-
tput; positive or negative pressure in the combustion-chamber,
the need of excess air, etc.
All these conditions may require a different air damper setting
(see Tab. A).
The purpose of this damper is to perform a fine-tuning of the in-
let air. Tuning of this device is possible acting of the
screw 1)(Fig. 21).
Burner operation
13
GB
0
D9873
1
3
2
1
0
Fig. 20
D9861
Fig. 21
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