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11.5 Air Damper Adjustment
The air damper is set in factory. This regulation is purely indicative. Each installation however,
has its own 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.
Air Damper (A) – 15/21 Burner Only
Air Damper (A) – The main air damper can be set in either of two positions. To set the positions
of the damper, proceed as follows: Remove the secondary air damper (B) loosening the screws
(1). Loosen the screw (2) and rotate the main air damper (A) to the required position. Retighten
the screw (2) and put back the secondary air damper (B).
Air Damper (B)
Air Damper (B) – The purpose of this damper is to perform a fine tuning of the inlet air. Tuning
of this device is possible by turning the screw (3).
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