Riello RG2F Installation, Use And Maintenance Instructions page 49

B
Fig. 11
Remove nozzle-holder assembly (1) after loosing screws

(2) and nut (3), remove the small cables (4) from the con-
trol box and the photoresistance (6).
Withdraw the small cables (4) from the electrodes, re-

move the diffuser disc-holder assembly (10) from the
nozzle-holder assembly (1) after loosing screw (3, fig.
12).
Screw the nozzle (11) correctly and tighten it as

shown in figure.
ATTENTION
When refitting the nozzle-holder assembly (1, fig. 11),
screw on nut (3) without tightening it all the way
with a driving torque of 15 Nm, as illustrated on the
right.
4.4 ELECTRODES ADJUSTMENTS
ATTENZIONE
THE GIVEN DISTANCES MUST BE RE-
SPECTED.
To adjust, proceed as follows:
Lean the diffuser disc-holder assembly

(1) on the nozzle-holder (2) and lock it
by screw (3).
For prospective adjustments loosen

screw (4) and move the electrodes as-
sembly (5).
To have access to the electrodes carry out
operation as described in chapter "4.2
RECOMMENDED NOZZLES" (page 8).
4.5 PUMP PRESSURE
The pump leaves the factory set at 12 bar. Make required adjustments with the aid of the screw (4, fig. 5, page 5).
4.6 COMBUSTION HEAD SETTING
It depends on the output of the burner and is carried out by rotating clockwise or counterclockwise the
setting screw (5) until the set-point marked on the regulating rod (9) is level with the outside plane of the
nozzle-holder assembly (1).
Figure 11 illustrates the head adjusted for a delivery of 1.50 GPH at 12 bar.
The set-point 3 of the regulating rod (9) is at the same level with the outside plane of the nozzle-holder
assembly (1) as shown in the table at page 8.
D5684
3
Fig. 12
(see fig. 11)
S7210
0
4.5
– 0.5 mm
4
5
3
D5537
9 GB
B
Fig. 11
4 5
– mm
2 1
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