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B
Fig. 12 – Remove nozzle-holder assem-
bly (1) after loosing screws (2) and nut (3), re-
move the small cables (4) from the control box,
the flame sensor (5) and the socket (6).
– Withdraw the small cables (4) from the elec-
trodes, remove the diffuser disc-holder assem-
bly (9) from the nozzle-holder assembly (1)
after loosing screw (3, Fig. 13).
– Screw the nozzle (10) correctly and tighten it
as shown in figure.
ATTENTION
During the reassembly of the nozzle-holder as-
sembly screw the nut (3) as shown in the figure
below.
TIGHTEN WITHOUT MOVING
BACKWARDS TO THE END
2
COMBUSTION HEAD SETTING
(see Fig. 12)
It depends on the output of the burner and is car-
ried out by rotating clockwise or counterclockwise
the setting screw (7) until the set-point marked on
the regulating rod (8) is level with the outside
plane of the nozzle-holder assembly (1).
– In the sketch the combustion head is set for an output of 0.85 GPH at 15 bar. The set-point 3 of the regulating
rod (8) is at the same level with the outside plane of the nozzle-holder assembly (1) as shown in the schedule;
4.2 ELECTRODES ADJUSTMENT
WARNING
Lean the diffuser disc-holder as-
sembly (1) on the nozzle-holder
(2) and lock it by screw (3).
For prospective adjustments of
the electrodes assembly (4),
loosen screw (5).
To have access to the electrodes
carry out operation as described in
chapter 4.1 (page 6) "RECOM-
MENDED NOZZLES".
2305
D5684
3
(see Fig. 13)
Fig. 13
Fig. 12
0
4.5
– 0.5 mm
2
4
3
1
D5343
7
GB
S7198
WARNING
MEASURES
MUST BE RESPECTED
2 – 2.5
mm
5
5.5 ±
0.3 mm
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