Riello RG3 Installations-, Bedienungs- Und Wartungsanleitung Seite 38

4. WORKING
4.1 COMBUSTION ADJUSTMENT
In conformity with EN267 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
gases, their temperatures and the average temperature of the water in the boiler.
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.
T h e v a l u e s s h o w n i n t h e t a b l e a r e m e a s u r e d o n a C E N b o i l e r ( a s p e r E N 2 6 7 ) .
They refer to 12.5% CO 2 at sea level and with gas oil and room temperature of 20 °C.
Nozzle
GPH Angle
1.75 60°
2.00 60°
2.25 60°
2.50 60°
3.00 60°
3.50 60°
3.50 60°
4.2 RECOMMENDED NOZZLES
Delavan type W - B ; Danfoss type
Monarch type R ; Steinen type S - Q
For 3.00 - 3.50 GPH nozzles it is advisable to use
full cones.
TO FIT NOZZLE CARRY OUT THE FOLLOW-
ING ACTIONS (See Fig. 11):
Remove nozzle-holder assembly (1) after loos-
–
ing screws (2) and nut (3), remove the small
cables (4) from the flame control and the flame
sensor (6).
Withdraw the small cables (4) from the elec-
–
trodes, remove the diffuser disc-holder assembly
(10) from the nozzle-holder assembly (1) after
loosing screw (3, Fig. 12, page 7).
Screw the nozzle (11) correctly and tighten it as
–
shown in the figure.
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
2308
Pump Burner
pressure output
bar kg/h ± 4%
12 7.0
12 8.0
12 9.0
12 10.0
12 12.0
12 14.0
14 15.2
S - B
3
D5684
Combustion head
adjustment
Set-point
0
1
3
3.5
5
6
6
Fig. 11
5 GB
concentration in the flue
2
Air damper
adjustment
Set-point
1.3
2.3
2.6
3.0
3.5
4.4
5.6
S7180