Air Damper Adjustment - Riello 40 G20S Installation, Use And Maintenance Instructions

Combustion head settings indicated in the schedule are valid for most cases.
The setting of the fan output according to the installation should normally be done only through the air
damper. Should one subsequently want to retouch also the setting of the combustion head, with the
burner running, operate on the rod (1) with a 6 mm spanner (2) as follows:
2
1
3

AIR DAMPER ADJUSTMENT :

The settings indicated in the schedule refer to the burner with its metal cover fitted and the com-
bustion chamber with "zero" depression.
These regulations are purely indicative.
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.
It is important to take account of the fact that the air
output of the fan differs according to whether the
burner has its metal cover fitted or not.
Therefore we recommended to proceed as follows:
– adjust the air damper as indicated in the schedule (3);
– mount the cover, simply by means of the upper
screw;
– check smoke number;
– should it become necessary to modify the air out-
put, remove the cover by loosening the screw,
adjust the air damper, remount the cover and finally
recheck the smoke number.
NOTE: When the burner works at a firing rate
higher than 18 kg/h remove the panel fitted
inside the metal cover.
(See figure).
2354
3
6
D8068
TURN TO THE RIGHT: (sign
In order to increase the volume of air entering the com-
bustion chamber and thus diminishing its pressure.
There is a reduction of CO
flame to the air diffuser disc improves.
(Setting advisable for ignitions at low temperatures).
TURN TO THE LEFT:
In order to reduce the volume of air entering the com-
bustion chamber and thus increasing its pressure.
The CO improves and the adhesion of the flame to
2
the diffuser tends to reduce.
(This setting is not advisable for ignitions at low tem-
peratures).
In any case do not bring the combustion head setting
more than one point away from that indicated in the
schedule. One set-point corresponds to 3 turns of the
rod; a hole (3) at its end facilitates counting the num-
ber of turns.
8
GB
+
)
and the adhesion of the
2
(sign – )
PANEL
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