Choice Of Nozzle; Nozzle Assembly; Combustion Head Setting - Riello RL 190/M Installation, Use And Maintenance Instructions

20119192
(A)
D856
(B)
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(D)
SETTING THE COMBUSTION HEAD
(E)
N° Notches
Light oil delivery in 2nd stage kg/h
(F)
D1977

CHOICE OF NOZZLE

See diagrams (B) - (C)page 11.
In case an intermediate delivery between the
two values indicated in the diagrams (B) - (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)
- Use spanner 3)(D) to change the nozzles.
(C)

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 190/M, maxi. light oil delivery = 150 kg/h
Diagram (F) indicates that for a delivery of 150
kg/h the RL 190/M Model requires the combus-
tion head to be set to approx. three notches, as
shown in Figure (E).
D462
D1985
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