3217
9
GB
4.
OPERATION
4.1
COMBUSTION ADJUSTMENT
In conformity with Efficiency Directive 92/42/EEC the
application of the burner on the boiler, adjustment and
testing must be carried out observing the instruction man-
ual of the boiler, including verification of the CO and CO
2
concentration in the flue gases, their temperatures and the
average temperature of the water in the boiler.
To suit the required appliance output, choose the proper
setting of the combustion head, and the main air damper
opening, as indicated in the table alongside.
4.2
COMBUSTION HEAD SETTING,
(see fig. 6)
The combustion head setting must be carried out by the
installer, and set as indicated in the table above.
To set the position of the head, proceed as follows:
remove screw (2) and release screws (1) position the
combustion head / gas valve assembly
(C)
to either set
point 1 or 2. Tighten screws (1) and refit screw (2).
The combustion head leaves the factory preset to
position (2).
4.3 AIR DAMPERS SETTING
The air setting is performed by mean of two independ-
ent dampers.
The main air damper can be set in either of two posi-
tions. To set the positions of the damper, proceed as
follows: release the secondary air damper (B) loosing
the screws (1). Loosen the screw (2) and rotate the
main air damper (A) to the required position 1or 2.
Retighten the screw (2) and put back the secondary air
damper (B).
The main air damper is factory preset to position 2.
The purpose of this damper is to perform a fine-tuning of the inlet air. Tuning of this device is possible act-
ing of the screw (3).
1
2
Fig. 6
1
2
C
E9235
E9175
Burner
thermal
power
Combustion
head setting
Main air
damper setting
Position
Position
16 - 26 kW
1
1
26 - 47 kW
2
2
MAIN AIR DAMPER (A, fig. 7)
SECONDARY AIR DAMPER (B, fig. 8)
Fig. 7
B
1
2
A
B
3
E9172
E9173
Fig. 8
ATC
ROC
