2604
5
GB
COMBUSTION ADJUSTMENT
In conformity with Efficiency Directive 92/42/EEC the application of the burner on the boiler, adjust-
ment and testing must be carried out observing the instruction manual of the boiler, including verifica-
tion of the CO and CO
2
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 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.
RECOMMENDED NOZZLES :
Monarch type R - NS;
Delavan type W - A - E
Steinen type H - Q
;
Danfoss type H - B
Angle
:
60° :
in most cases.
80° :
in case of flame detachment, during ignitions at low tem-
peratures.
PUMP PRESSURE
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.
COMBUSTION HEAD SETTING
: This is done when fitting the nozzle, with the blast tube
removed. It depends on the output of the burner and is car-
ried 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.
Nozzle
Pump pressure
Burner output
Comb. head
adjustment
Air damper
adjustment
GPH
Angle
bar
kg/h ± 4%
Set-point
Set-point
0.40
80°
12
1.6
0
2.7
0.50
60° / 80°
12
2.0
1
3.3
0.60
60° / 80°
12
2.4
2
4
0.65
60° / 80°
12
2.6
3
5,5
0.75
60°
12
3.0
4
7
1
2
3
4
1
2
3
D5496
1
3
5
In the sketch on the left, the combustion
head is set for an output of 0.60 GPH at
12 bar, while the shutter is level with set-
point 2, as required by the above sche-
dule.
Blast tube
Regulating rod
Shutter
Terminal plane of the blast tube
