Nozzle Assembly - Riello 3470210 Installation, Use And Maintenance Instructions

D458
(A)
3
1
2
(C)
1
(D)
D590
4 5
D3869
3
2

NOZZLE ASSEMBLY

At this stage of installation the burner is still dis-
assembled from the blast tube; it is therefore
possible to fit two nozzles with the box spanner
1) (A) (16 mm), after having removed the plastic
plugs 2)(A), fitting the spanner through the cen-
tral hole in the flame stability disk. Do not use
any sealing products such as gaskets, sealing
compound, or tape. Be careful to avoid damag-
ing the nozzle sealing seat. The nozzle must be
screwed into place tightly but not to the maxi-
mum torque value provided by the wrench.
The nozzle for the 1st stage of operation is the
one lying beneath the firing electrodes fig. (B)
Make sure that the electrodes are positioned as
shown in fig. (B).
Finally remount the burner 4)(C) to the slide
(B)
bars 3) 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 2) on the slide bars 3) and
screw 1) that attaches 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:
- Open the burner on its guides as shown in
fig. (C) p.5.
- Remove the nuts 1)(D) and the diffuser disc
assembly 2)
- Use spanner 3(D) to change the nozzles.
D3868
7