Riello 3739750 Installation, Use And Maintenance Instructions page 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
Pump pressure
Nozzle
Angle 1 st stage 2 nd stage 1 st stage 2 nd stage
GPH
2.50 60° 9
3.00 60° 9
3.50 60° 9
4.00 60° 9
4.50 60° 9
4.2 RECOMMENDED NOZZLES
Monarch type R ; Delavan type W - E
Steinen type Q ; Danfoss type S
Satronic type S
TO FIT NOZZLE CARRY OUT THE FOLLOWING
ACTIONS:
– Remove nozzle-holder assembly (1) after loosing
screws (2) and nut (3), remove the small cables
(4) from the flame control and the flame sensor
(5), (see Fig. 12).
– Withdraw the small cables (4) from the electrodes,
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 figure 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
2311
at sea level and with light oil and room temperature of 20 °C.
2
Burner output
bar
14 8.7
14 10.4
14 12.2
14 13.9
14 15.6
D5684
Comb. head
adjustment
kg/h ± 4%
Set-point
10.8
13.0
15.2
17.3
19.5
Fig. 12
6 GB
concentration in the flue
2
Air damper adjustment
1 st stage
Set-point
0 0.2
1 0.5
2.5 0.8
4 1.0
6 1.3
S7238
2 nd stage
Set-point
1.8
2.7
3.7
4.5
6.0