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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
2
temperatures and the average temperature
of the water in the boiler.
To suit the required appliance output, choose
the proper setting of the combustion head, and
the air damper opening.
4.2
COMBUSTION HEAD SETTING,
(see fig. 9)
The combustion head leaves the factory
set for the minimum output.
Setting depends on the output of the burner.
Rotate the setting screw (6) in a clockwise or
anticlockwise direction until set point marked
on the regulating rod (2) is level with the out-
side plane of the head assembly (1).
Figure 9 shows the head regulating rod set
on set point 3.
Example for HELIS 2 GI510 burner:
The burner is installed in a 40 kW boiler.
Taking an efficiency level of 90% the burner
should give an output of app. 45 kW with the
regulating rod set at set point 3 as shown in
the diagram.
The diagram is for indication purposes: to
assure good working from the burner we
suggest adjusting the combustion head
according to the boiler.
REMOVING THE HEAD ASSEMBLY
Proceed as follows to remove the head
assembly:
Disconnect the connections (3 and 5).
Extract the small tube (4) and loosen the
screws (10).
Unscrew and remove the screws (7), pull
out the head assembly support (1) turning
it slightly to the right.
Take care not to change the setting posi-
tion on the elbow-bracket (2) during dis-
mantling.
REASSEMBLING THE HEAD ASSEMBLY
Follow the above instructions in reverse,
returning the head assembly (1) to its origi-
nal position.
Fig. 9
kcal/h
kW
130,000
150
130
110,000
110
90,000
90
70,000
70
50,000
50
30,000
30
10,000
10
9
GB
912T1
911T1
0
2
4
Set point
S7004
D9979
20017630
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