Combustion Adjustment; Recommended Nozzles - Riello RG3 Montage- Und Bedienungsanleitung

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 2 at sea level and with light 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 S - B;
Monarch type R ; Steinen type S - Q.
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 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 control box and the photore-
sistance (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.
In the long head version the socket wrench (12)
should lock the extension part that carries the
nozzle.
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
1915
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
D5684
3
Combustion head
adjustment
Set-point
0
1
3
3.5
5
6
6
Fig. 11
12
6 GB
2
Air damper
adjustment
Set-point
1.3
2.3
2.6
3.0
3.5
4.4
5.6
S7180