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4.8
Combustion head adjustment
To adjust, proceed as follows:
loosen the screw A)(Fig. 11), 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 155 kW boiler.
Considering an efficiency of 90%, the burner must supply around
172 kW.
The diagram (Fig. 12) 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).
4.9
Air damper adjustment
The adjustment of the air flow rate is carried out using the fixed
damper 1)(Fig. 13) after having loosened the screws 2).
Once optimal adjustment has been attained, fully screw in the
screws 2).
It is advisable to carry out an analysis of the com-
bustion values with the cover assembled.
WARNING
20064802
Installation
C
A
B
kcal/h
kW
240
200.000
220
180.000
200
160.000
180
172
140.000
160
140
120.000
120
100.000
100
80.000
70.000
80
0
14
GB
1
2
3
Notch No.
D5231
S7015
Fig. 11
D5109
4
5
Fig. 12
1
2
Fig. 13
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