Riello 3739750 Installation, Use And Maintenance Instructions page 39

4.3 COMBUSTION HEAD SETTING
It depends on the output of the burner and is carried out by rotating clockwise or counterclockwise the set-
ting screw (6) until the set-point marked on the regulating rod (7) is level with the outside plane of the noz-
zle-holder assembly (1).
– In the sketch the combustion head is set for an output of 3.50 GPH at 15 bar.
The set-point 2.5 of the regulating rod is at the same level with the outside plane of the nozzle-holder assem-
bly as shown in the schedule.
4.4 ELECTRODES ADJUSTMENT (
ATTENTION
Lean the diffuser disc-holder as-
sembly (1) on the nozzle-holder
(2) and lock it by screw (3). For
prospective adjustments loosen
sc re w ( 4) and move the elec-
trodes assembly (5).
To have access to the electrodes
carry out operation as described in
chapter 4.2 (page 6) "RECOM-
MENDED NOZZLES".
4.5 PUMP PRESSURE AND AIR OUTPUT
st
1 STAGE ADJUSTMENT
–
ADJUSTMENT OF AIR SHUTTER:
Unloosen the nut (1), turn the screw (2) until the indicator (3) reaches the
position desired. Then lock the nut (1), (see Fig. 14).
PRESSURE REGULATION:
This is set at 9 bar at the factory.
Should it be necessary to re-set or alter such pressure, this can be done, by
adjusting screw (7).
The pressure gauge must be mounted in place of cap (8), (see Fig. 15).
2
nd
STAGE ADJUSTMENT
–
ADJUSTMENT OF AIR SHUTTER:
Unloosen the nut (4), turn the screw (5) until the
indica tor ( 3) re ache s th e po sit io n desir ed .
Then lock the nut (4), (see Fig. 14).
PRESSURE REGULATION:
T h i s i s s e t a t 1 4 b a r a t t h e f a c t o r y .
Should it be necessary to re-set or alter such pres-
sure, this can be done, by adjusting screw (9).
The pressure gauge must be mounted in place of
cap (8), (see Fig. 15).
When burner shuts down the air damper automati-
cally closes till a max. chimney depressure of
0,5 mbar.
2311
(see Fig. 12, page 6)
see Fig. 13)
Fig. 13
D5341
Fig. 15
7 GB
WARNING
MEASURES MUST BE
RESPECTED
Fig. 14
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