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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
2
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
0.60
60° / 80°
0.65
60° / 80°
0.75
60°
0.85
60°
1.00
60°
1.10
60°
1.25
60°
1
RECOMMENDED NOZZLES: Monarch type R - NS; Delavan type W - A - E
Angle :
2
PUMP PRESSURE 12 bar : the pump leaves the factory set at this value
3
COMBUSTION HEAD SETTING : This is done when fitting the nozzle, with the blast tube
Terminal plane of the blast tube
Blast tube
D5232
at sea level and with light oil and room temperature of 20 °C.
2
Pump pressure
2
bar
11
12
12
12
12
12
12
Steinen type H - Q
60° : in most cases.
80° : in case of flame detachment, during ignitions at low temper-
atures.
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 indi-
cated in the schedule.
2
5
3
1
Regulating rod
Shutter
Comb. head
Burner output
kg/h ± 4%
2.3
2.6
3.0
3.4
4.0
4.4
5.0
;
Danfoss type H
In the sketch on the left, the combustion
head is set for an output of 0.85 GPH at
12 bar, while the shutter is level with set-
point 3, as required by the above sche-
dule.
5
GB
Air damper
adjustment
adjustment
3
Set-point
Set-point
1.5
2
2.5
3
4
5
6
4
2
2.2
2.5
3
4.5
6
7
20013748
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