3389
6
GB
COMBUSTION HEAD ADJUSTMENT
Loosen the screw (A), 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 63 kW boiler.
Considering efficiency of 90%, the burner must
supply around 70 kW.
The diagram shows that for this
output the adjustment must be
made on notch
1.5
.
The diagram is to be used only
for initial settings.
To improve air pressure switch
operation it may be necessary to
reduce the combustion head
opening
(notch toward position
0
).
PROBE - ELECTRODE POSITIONING
IMPORTANT
Do not turn the ignition electrode but leave it as shown in the figure; if the starting electrode is put near
the ionisation probe, the amplifier of the control box might be damaged.
S7015
C
A
B
N° notch
0
1
0,5
1,5
2
100
80
70
60
50
40
90
80.000
70.000
60.000
50.000
40.000
kcal/h
kW
2,5
3
S5071
D5070
Ignition electrode
Diffuser
WARNING
2.5
3.5 mm
Probe
Probe
Electrode
2.2
8°
~
40 mm
