2785
7
4.4
MAINTENANCE POSITION
Access to the combustion head, the diffuser disc-holder assembly, electrodes and nozzle (see fig. 11).
®
Loosing the fixing nut to the flange and remove the burner out of the boiler.
®
Hook the burner to the flange (1), by removing the blast tube (2) after loosing the fixing screws (3).
®
Remove the small cables (4) from the electrodes (5) and the diffuser disc-holder assembly from the nozzle-
holder (6) after loosing its fixing screw (7).
®
Once replacement of the nozzle has been made, screw it and tighten it as shown in the figure 11.
4.5
DIFFUSER DISC AND ELECTRODES SETTING,
see fig. 12
E9189
E9191
1
2
3
2
5
4
Fig. 11
7
6
To ad just the diffu ser dis c u nit, p roceed as
follows:
®
Loosen the screw (
1
, fig. 12).
®
Move the diffuser disc unit up to level
.
®
Tighten the screw (
1
).
To adjust the electrodes unit, proceed as fol-
lows:
®
Loosen the screw (
2
, fig. 12).
®
Move the electrodes unit up to level
.
®
Tighten the screw (
2
).
A
B
THESE DIMENSIONS MUST BE OBSERVED
IMPORTANT
D4269
1
Fig. 12
2
B
A
+ 0.5
0
3
0
- 0
.2
5.7
5
A
B
4
±
0.5
+ 0.7
- 0.5
7.5