Combustion Adjustment - Riello G20 Installation, Use And Maintenance Instructions

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 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
1
GPH Angle
2,00 60°
2,25 60°
2,50 60°
3,00 60°
3,50 60°
4,00 60° / 45°
4,50 60° / 45°
1
NOZZLES RECOMMENDED: Monarch type R - PLP ; Delavan type B - W
Angle :
2
PRESSURE:
3
COMBUSTION HEAD SETTING : This is done when fitting the nozzle, with the blast tube
Terminal plane of the blast tube
D5284
Blast tube
at sea level and with light oil and room temperature of 20 °C.
2
Pump pressure
2
bar
12
12
12
12
12
12
12
Steinen
60° : in most cases.
detachment during ignition.
45° : for narrow and long combustion-chambers.
12 bar : the pump leaves the factory set at this value
14 bar : improves flame retention; it is therefore suitable for ignitions at
low temperatures.
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 indicated
in the schedule.
2
5 3 1
Regulating rod
Shutter
Burner output
kg/h ± 4%
8,0
9,0
10,0
12,0
14,0
16,1
18,0
type S - SS ; Danfoss type S - B
Particularly suited to avoid flame-
In the sketch on the left, the combustion
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.
5 GB
Comb. head Air damper
adjustment adjustment
3
Set-point
1
1,5
2
2,5
3,5
5
6
2
4
Set-point
3
3,2
3,5
4,3
5,5
6,5
7
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