3313
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).
ATTENTION
To disassemble the diffuser disc holding head, pro-
ceed as follows:
– Loosen the two screws (A) without removing them.
– Pull back the head, rotating it by about 180°.
– Extract the head, tilting it downwards.
Example:
The burner is installed in a 21 kW
boiler.
Considering an efficiency of 90%,
the burner must supply around
23 kW.
The diagram shows that for this
output the adjustment must be
made on notch
1
.
The diagram is to be used only
for initial settings, to improve air
pressure switch operation or
improve combustion, it may be
necessary to reduce this setting
(set point toward position
0
).
PROBE - ELECTRODE POSITIONING
IMPORTANT
Do not turn the starting electrode but leave it as shown in the drawing; if the starting electrode is put
near the ionization probe, the amplifier of the control box might be damaged.
C
A
B
A
S7020
0
0,5
1
1,5
2
40
30
25
20
15
10
35
30,000
25.000
20,000
15.000
10,000
kcal/h
kW
D5051
23
Set point
D5033
Ignition electrode
Diffuser
WARNING
2.5
−
3.5 mm
Probe
Probe
Electrode
Put the ceramic near
the diffuser disc
1,7
