Choice Of Nozzle; Nozzle Assembly; Combustion Head Setting - Riello RL 70/M Installation, Use And Maintenance Instructions

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(A)
D856
(B)
(D)
(E)
N° Notches
(F)
D1221
D462
Max light oil delivery kg/h
CHOICE OF NOZZLE (A)
See diagram (C)page 11.
In case an intermediate delivery between the
two values indicated in the diagram (C)p. 11 is
required, a nozzle with higher delivery must be
chosen. Delivery reduction will be obtained by
means of the pressure regulator.
RECOMMENDED NOZZLES:
Type A3 or A4 Bergonzo nozzles - 45° angle

NOZZLE ASSEMBLY

At this stage of installation the burner is still dis-
assembled from the blast tube; it is therefore
possible to fit the nozzle with the box spanner
1)(A), fitting the spanner through the central
hole in the flame stability disk. Do not use any
sealing products such as gaskets, sealing com-
pound, or tape. Be careful to avoid damaging
the nozzle sealing seat.
Make sure that the electrodes are positioned as
shown in Figure (B).
Finally remount the burner 3)(C) on 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:
- Pull back the burner on its slide bars as shown
in fig. (B)p.5.
- Remove the nuts 1)(D) and the disk 2)
(C)
- Use spanner 3)(D) to change the nozzles.

COMBUSTION HEAD SETTING

The setting of the combustion head depends
exclusively on the maximum burner delivery at
which it will be operating.
Turn screw 4)(E) until the notch shown in dia-
gram (F) is level with the front surface of flange
5)(E).
Example:
RL 70/M, maximum light oil delivery = 50 kg/h
Diagram (F) indicates that for a delivery of 50
kg/h the RL 70/M Model requires the combus-
tion head to be set to approx. three notches, as
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shown in Figure (E).
D1223
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