Riello 40 Installation, Use And Maintenance Instructions page 32

Combustion head settings indicated in the schedule
are valid for most cases.
The setting of the fan output according to the instal-
lation 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:
TURN TO THE RIGHT: (SIGN
In order to increase the volume of air entering the
combustion chamber and thus diminishing its pres-
sure.
There is a reduction of CO
flame to the air diffuser disc improves. (Setting
advisable for ignitions at low temperatures).
TURN TO THE LEFT: (SIGN – )
In order to reduce the volume of air entering the combustion chamber and thus increasing its pressure.
The CO improves and the adhesion of the flame to the diffuser tends to reduce. (This setting is not
2
advisable for ignitions at low temperatures).
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 number of turns.
3
AIR DAMPER ADJUSTMENT : The settings indicated in the schedule refer to the burner
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 output, remove the cover by loosening the screw,
adjust the air damper, remount the cover and finally recheck the smoke number.
1716
+
)
and the adhesion of the
2
with its metal cover fitted and the combustion chamber with
"zero" depression. These regulations are purely indicative.
Each installation however, has its own unpredictable work-
ing 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.
7
GB
2
1
6
D5587
3