Combustion Adjustment; Recommended Nozzles - Riello RG4D TL Manuel D'entretien

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.
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
Pump pressure
Nozzle
Angle 1 st 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 ;
Steinen type S .
NOTE: To achieve CLASS 2 (EN267:1999)
em issions, the foll owing nozzles
have been used:
- hollow-cone model.
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 control box and the photoresistance
(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
1917
at sea level and with light oil and room temperature of 20 °C.
2
Burner output
bar
2 nd stage 1 st stage
14 8.7
14 10.4
14 12.2
14 13.9
14 15.6
D5684
3
Comb. head
adjustment
kg/h ± 4%
2 nd stage
Set-point
10.8
13.0
15.2
17.3
19.5
Fig. 12
6 GB
Air damper adjustment
1 st stage
Set-point
0 0.2
1 0.5
2.5 0.8
4 1.0
6 1.3
10
S7239
2
2 nd stage
Set-point
1.8
2.7
3.7
4.5
6.0