Riello RG2F Installation, Use And Maintenance Instructions page 48

4. WORKING
4.1 COMBUSTION ADJUSTMENT
In conformity with Efficiency Directive EEC/92/42, the installation of the burner to the heat generator, setting
and testing must all be performed in respect of the instruction manual for the heater, including the controls
on the concentration of CO and CO
air temperatures in the generator.
To suit the required appliance output, choose the proper nozzle and adjust the pump pressure, the setting
of the combustion head, and the air damper opening in accordance with the following schedule.
The values given in the table refer to a CEN boiler (in accordance with EN 267). They refer to 12.5% of
CO , at sea level, room temperature and light oil temperature at 20°C, 50Hz power frequency and combus-
2
tion chamber counterpressure at 0.
Nozzle
GPH Angle
1.00 60°
1.10 60°
1.25 60°
1.50 60°
1.75 60°
2.00 60°
2.25 60°
ATTENTION
The values given in the table are just an indication; to get the best performance from the burner, the
regulations should be made on the basis of the effective requirements of the generator.
With 60Hz power frequency, the burner must be re-set, closing the air damper, so that the amount of
intake air is reduced.
4.2 RECOMMENDED NOZZLES:
Delavan type W - B
Monarch type R
For 1.75 - 2.00 - 2.25 GPH nozzles it is advisable to use
full cones.
4.3 MAINTENANCE POSITION
THE ACCESSIBILITY TO THE NOZZLE, THE DIFFUSER
DISC AND THE ELECTRODES IS MADE EASY IN 2
WAYS:
A
Fig. 10
Remove the burner out of the heat generator, after loosing

the fixing nut to the flange.
Hook the burner to the flange (1), by removing the blast

tube (2) after loosing the fixing screws (3).
Remove the small cables (4) from the electrodes and the

diffuser disc-holder assembly (5) from the nozzle-holder as-
sembly after loosing its fixing screw (3, fig. 12, page 9).
Screw the nozzle (6) correctly and tighten it as shown

in the figure.
20039769
in the flue gases, the flue gas temperature and the average water and
2
Pump Burner
pressure output
bar kg/h ± 4%
12 4.0
12 4.4
12 5.0
12 6.0
12 7.0
12 8.0
14 9.8
Danfoss type S - B;
Steinen type S - Q.
Combustion head
adjustment
Set-point
0
1
2
3
4
5
6
2
5
4
S7792
8 GB
Air damper
adjustment
Set-point
0.9
3.1
3.4
3.8
4.5
4.9
6.0
A
Fig. 10
3
6
1