Combustion Adjustment; Combustion Head Setting - Riello G20S Instrucciones De Instalación, Montaje Y Funcionamiento

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 concentration in the flue gases, their temperatures and the average temperature of the water
2
in the boiler.
To suit the required appliance output, fit the nozzle then 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
1
GPH Angle
2.00 60°
2.25 60°
2.50 60°
3.00 60°
3.50 60°
4.00 60°
4.50 60°
4.50 60°
1
RECOMMENDED NOZZLES: Monarch type R - PLP
Angle :
2
COMBUSTION HEAD SETTING : This is done when fitting the nozzle, with the blast tube
Terminal plane of the blast tube
D5284
Blast tube
2354
at sea level and with light oil and room temperature of 20 °C.
2
Pump Burner
output
bar kg/h ± 4%
12 8.0
12 9.0
12 10.0
12 12.0
12 14.0
12 16.1
12 18.1
14 19.5
Delavan type B - W
Steinen
Danfoss type S - B
60° : In most cases. Particularly suited to avoid flame-detach-
ment during ignition.
For narrow and long combustion-chambers it is advisable
to use full cone nozzles (e.g. 60° B).
removed. It depends on the output of the burner and is
carried out by rotating the regulating rod, till the terminal
plane of the blast tube is level with the set-point, as indi-
cated in the schedule.
2
5 3 1
Regulating rod
Shutter
Comb. head Air damper adjustment
adjustment
2
Set-point
1
1.5
2
2.5
3.5
4
5
6
type S - SS
In the sketch on the left, the combus-
tion head is set for an output of 3.50
GPH at 12 bar, while the shutter is
level with set-point 3.5, as required by
the above schedule.
6
GB
Low-flame High-flame
Set-point Set-point
2.2 2.5
2.5 2.9
2.7 3.1
3.1 3.7
3.5 4.8
4
4.5
5
3
6
7
8