Riello Burners RG4S Installation, Use And Maintenance Instructions page 26

4. WORKING
4.1 COMBUSTION ADJUSTMENT
In conformity with Efficiency Directive 92/42/EEC the application of the burner on the boiler, adjustment and
testing must be carried out observing the instruction manual of the boiler, including verification of the CO and
CO concentration in the flue gases, their temperatures and the average temperature of the water in the boiler.
2
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 shown in the table are measured on a CEN boiler (as per EN 267).
They refer to 12.5% CO
Nozzle
pressure
GPH Angle
2.50 60°
3.00 60°
3.50 60°
4.00 60°
4.50 60°
4.50 60°
4.2 RECOMMENDED NOZZLES:
Monarch type R
Delavan type W (up to 3,00 GPH)
(over 3,00 GPH)
Delavan type B
Steinen type SS - S; Danfoss type B - S
TO FIT NOZZLE CARRY OUT THE FOLLOWING
ACTIONS (see fig. 12)
Remove nozzle-holder assembly (1) after loos-
ing screws (2) and nut (3), remove the small
cables (4) from the control box and the pho-
toresistance (5).
Withdraw the small cables (4) from the elec-
trodes, remove the diffuser disc-holder assembly
(8) from the nozzle-holder assembly (1) after
loosing screw (3, fig. 13, page 7).
Screw the nozzle (9) correctly and tighten it
as shown in fig. 12.
Attention
During the reassembly of the nozzle-holder assem-
bly screw the nut (3) as shown in the figure below.
TIGHTEN WITHOUT MOVING
BACKWARDS TO THE END
2310
at sea level and with light oil and room temperature of 20 °C.
2
Pump Burner
output
bar kg/h ± 4%
12 10.0
12 12.0
12 14.0
12 16.1
12 18.1
14 19.5
D5684
3
Combustion
head adjustment
Set-point
0
1
2.5
4
6
6
Fig. 12
6 GB
Air damper adjustment
Low-flame High-flame
Set-point Set-point
0.2 1.4
0.4 2.1
0.7 3.0
0.9 3.5
1.4 4.5
1.4 6.0
S7219