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5.5
Air damper adjustment
The settings indicated in the Tab. C are purely indicative.
Each installation however, has its own unpredictable working con-
ditions: 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.
The air setting is performed by mean of two independent dampers
(see Fig. 16 and Fig. 17).
Main air damper (Fig. 17)
To set the positions of the damper, proceed as follows:
–
Remove the secondary air damper (B) loosing the screws (1)
–
Loosen the screw (2) and rotate the main air damper (A) to the
required position.
–
Re tighten the screw (2) and put back the secondary air damp-
er (B).
Secondary air damper (Fig. 17)
The purpose of this damper is to perform a fine-tuning of the inlet
air. To set the positions of the damper, tuning of this device is pos-
sible acting of the screw 3)(Fig. 17).
Burner operation
Main air damper
Secondary air damper
21
A
2
E9281
3
E9172
B
1
Fig. 16
B
Fig. 17
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