8
NOZZLE ASSEMBLY
Fit two nozzles with the box spanner 1)(A) (16
mm), after having removed the plastic plugs
2)(A), fitting the spanner through the central
hole in the flame stability disk.
Do not use any sealing products such as gas-
kets, sealing compound, or tape. Be careful to
avoid damaging the nozzle sealing seat. The
nozzles must be screwed into place tightly but
not to the maximum torque value provided by
the wrench.
The nozzle for the 1st stage of operation is the
one lying beneath the firing electrodes Fig. (B).
If it proves necessary to change a nozzle with the
burner already fitted to the boiler, proceed as
outlined below:
- Retract the burner on its slide bars as shown
in fig. (C) page 7.
- Remove the nuts 1)(D) and the disk 2)(D).
- Use spanner 3)(D) to change the nozzles.
POSITION OF ELECTRODES (B)
Make sure that the electrodes are positioned as
shown in figure (B).
COMBUSTION HEAD SETTING (E)
Turn screw 17)(A)p. 2 until the notch identified is
aligned with the front surface of the line.
16
:
4- 4,5 mm
(D)
(B)
D1249
D3947
6
5
4
3
2
1
0
1000
0
1
2
3
4
5
6
1500
2000
2500
3000
3500
kW
7
500
0
8
9
10
Electrode
(E)
D3948
N° Notches
Max burner output
(A)
D691
