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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
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, 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 schedule.
Values in the table refer to 12.5% CO
Nozzle
Pump pressure
1
Angle 1 st stage 2 nd stage 1 st stage 2 nd stage
GPH
1.75
60°
10
2.00
60°
10
2.25
60°
10
2.50
60°
10
2.75
60°
10
3.00
60°
10
1
RECOMMENDED NOZZLES
Steinen type H
Danfoss type H
Delavan type W
TO FIT NOZZLE CARRY OUT THE FOLLOWING
ACTIONS (see fig. 12):
– Remove nozzle-holder assembly (1) after
loosing screws (2) and nut (3), remove small ca-
bles (4) from the control box and the flame de-
tector (5).
– Withdraw the small cables (4) from the elec-
trodes, remove the diffuser disc-holder assem-
bly (8) from the nozzle-holder assembly (1) after
loosing screw (3, fig. 13, page 7).
– Screw the nozzle (9) correctly and tighten
it as shown in figure.
ATTENTION
During the reassembly of the nozzle-holder
assembly screw the nut (3) as shown in the figure
below.
D5684
3
TIGHTEN WITHOUT MOVING
BACKWARDS TO THE END
2322
at sea level and to "zero" pressure in the combustion chamber.
2
Burner output
kg/h ± 4%
bar
14
6.6
14
7.3
14
8.3
14
9.2
14
10.4
14
11.1
Comb. head
adjustment
2
Set-point
7.7
2.0
8.8
2.5
10.0
4.0
10.4
5.0
12.5
6.0
13.5
7.0
2
4
5
3
7
8
2
6 4 0
Fig. 12
6
GB
Air damper adjustment
1 st stage
2 nd stage
Set-point
Set-point
0.2
2.0
0.25
2.2
0.25
2.2
0.4
2.4
0.6
3.5
0.7
4.5
6
1
8
2
1
S7159
2
9
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