2587
7
MAINTENANCE POSITION
ACCESS TO THE COMBUSTION HEAD, ELECTRODES AND NOZZLE (see fig. 10).
➤ Remove the burner out of the boiler, after loosing the fixing nut to the flange.
➤ Hook the burner to the flange (1), by removing the blast tube (2) after loosing the fixing screws (3).
➤ Remove the electrodes assembly (5) from the nozzle holder (4) after loosing its fixing screw (A, fig. 11).
➤ Screw the nozzle (6).
4.3 ELECTRODES SETTING
E1662 E1663
1
2
3
5
6
4
Fig. 10
Before removing or assembling the
nozzle, loosen the screw (A, fig. 11)
and move the electrodes ahead.
TYPE
489T50 2 – 2.5 mm
488T50 4
± 0.5 mm
ATTENTION
D
4 ± 0.3 mm
IMPORTANT:
THESE DIMENSIONS
MUST BE OBSERVED
D5230
A
D
Fig. 11
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