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4.
WORKING
4.1
COMBUSTION ADJUSTMENT
In conformity with Efficiency Directive 92/42/EEC the application of the burner on the boiler, adjustment and te-
sting 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 table.
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.
Pump pressure
Nozzle
1 st stage
GPH
Angle
1.00
60°
9
1.10
60°
9
1.25
45°
9
1.25
60°
9
1.35
45°
9
1.35
60°
9
1.50
45°
9
1.50
60°
9
1.75
60°
9
4.2
RECOMMENDED NOZZLES:
4.3
COMBUSTION HEAD ADJUSTMENT,
Combustion head adjustment varies depending on
burner delivery.
To adjust, proceed as follows:
Turn adjusting screw (2) clockwise or anticlock-
wise until the notch on the regulating rod (3) is
lined up with the outer surface of the nozzle-hold-
er assembly (1).
In the example, the regulating rod (3) is set to
setpoint 3. This means the burner is adjusted for
an output of 6.6 kg/h with a pump pressure of
14.5 bar using a 1.50 GPH nozzle, as indicated in
the reference table.
3023
Burner output
bar
kg/h ± 4%
2 nd
1 st stage
stage
14.5
3.5
14.5
3.8
14.5
4.3
14.5
4.3
14.5
4.3
14.5
4.7
14.5
5.2
14.5
5.2
14.5
6.1
Delavan type W ; Danfoss type S.
Comb. head
adjustment
2 nd stage
Set-point
4.4
9.0
4.9
7.0
5.5
5.0
5.5
5.0
6.0
4.0
6.0
4.0
6,6
3.0
6.6
3.0
7.7
0.0
(see fig. 12)
Fig. 12
7 GB
Air damper adjustment
1 st stage
2 nd stage
Set-point
Set-point
0.6
1.5
0.7
1.5
0.8
2.0
0.8
2.0
1.8
2.0
0.9
2.0
1.0
2.2
1.1
3.5
1.4
6.0
3
2
1
1
2
E9261
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