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5.8
Combustion head adjustment
To adjust, proceed as follows:
➤ loosen the screw A)(Fig. 12), move the elbow B) so that the
rear plate of the coupling (C) coincides with the set point;
➤ tighten the screw A).
Example:
The burner is installed in a 81 kW boiler.
Considering an efficiency of 90%, the burner must supply around
90 kW.
The diagram (Fig. 13) shows that for this output the adjustment
must be made on notch 3.
The diagram is to be used only for initial settings,. To ensure
good air pressure switch operation it may be necessary to reduce
this combustion head opening (notch toward pos. 0).
5.9
Air dampers adjustment
The air damper 1)(Fig. 14) is powered by the air damper operat-
ing motor 2) that ensures that the damper fully opens before the
burner's starting cycle.
To adjust the fixed air damper 3)(Fig. 14) it is necessary to:
➤ loosen the screws 4) and rotate the damper as far as the
required point;
➤ once the best adjustment has been attained, fully screw
down the screws4) to ensure the free circulation of the
mobile air damper 1).
It is advisable to carry out an analysis of the com-
bustion values with the cover assembled.
WARNING
20063710
Installation
C
A
B
kcal/h
kW
120
100,000
110
90,000
100
80,000
90
70,000
80
70
60,000
60
50,000
50
40,000
40
0
1
3
4
16
GB
1
2
3
Notch No.
D5036
S7015
Fig. 12
D5258
4
5
Fig. 13
2
4
Fig. 14
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