11
6074
GB
Installation
4.7
Nozzle assembly
At this stage of installation the burner is still disassembled from
the blast tube; it is therefore possible to fit the nozzle with the box
spanner 1) (Fig. 8) (16 mm), after having removed the plastic
plugs 2) (Fig. 8), 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. 9)
Make sure that the electrodes are positioned as shown in (Fig. 9)
Finally refit the burner 3) (Fig. 10) to the slide bars 2) and slide it
up to the flange 5),
keeping it slightly raised to prevent the
flame stability disk from pressing against the blast tube
.
Tighten the screws 1) on the slide bars 2) and screws 4) fixing the
burner to the flange.
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. 7 pag. 9).
– Remove the nuts 1) (Fig. 11) and the disk 2).
– Use spanner 3) (Fig. 11) to change the nozzles.
D691
Fig. 8
Fig. 9
D692
Fig. 10
D1248
Fig. 11
D694
