Riello G10 Installation, Use And Maintenance Instructions page 10

2
PUMP PRESSURE
12 bar : The pump leaves the factory set at this
value.
14 bar : Improves flame retention; it is therefore
suitable for ignitions at low temperatures.
3 COMBUSTION HEAD SETTING
(see fig. 4 and 5)
This is done when fitting the nozzle, with the blast
tube removed. It depends on the output of the
burner and is carried out by rotating the regulating
rod, till the terminal plane of the blast tube is level
with the set-point, as indicated in the schedule.
The combustion head is set for an output of 1.50
GPH at 12 bar, while the shutter is level with set-
point 3, as required in the table.
Combustion head settings indicated in the table are
valid for most cases. The setting of the fan output
according to the installation should normally be
done only through the air damper. Should one sub-
sequently want to retouch also the setting of the
combustion head, with the burner running, operate
on the rod (1) with a 6 mm spanner (2) as follows:
TURN TO THE RIGHT: (sign
In order to increase the volume of air entering the
combustion chamber and thus diminishing its pres-
sure. There is a reduction of CO
of the flame to the air diffuser disc improves.
(Setting advisable for ignitions at low temperatures).
TURN TO THE LEFT: (sign – )
In order to reduce the volume of air entering the
combustion chamber and thus increasing its pres-
sure. The CO improves and the adhesion of the
2
flame to the diffuser tends to reduce. (This setting
is not advisable for ignitions at low temperatures).
In any case do not bring the combustion head set-
ting more than one point away from that indicated
in the schedule. One set-point corresponds to 3
turns of the rod; a hole (3) at its end facilitates
counting the number of turns.
4
AIR DAMPER ADJUSTMENT (see fig. 6)
The mobile air damper (A) operated by the jack (B) assures the complete opening of the air
intake. The regulation of the air-rate is made by adjusting the fixed air damper (C), after loosing
the screws (D). When the optimal regulation is reached, screw tight the screws (D) to assure a
free movement of the mobile air damper (A).
The settings indicated in the schedule refer to the burner with its metal cover fitted and the com-
bustion chamber with "zero" depression.
These regulations are purely indicative. Each installation however, has its own unpredictable
working conditions: actual nozzle output; positive or negative pressure in the combustion-cham-
ber, the need of excess air, etc. All these conditions may require a different air-damper setting.
2399
+
)
and the adhesion
2
8
Fig. 4 Terminal plane of the blast tube
D5398
Fig. 5
1
Fig. 6 A
D
GB
Regulating rod
2
5 3 1
Shutter
Blast tube
2 3
6
D8068
B
C
D
D5555