24
Bentone
Air adjustment
On all burners the air adjustment can be made with or
without the cover fitted. Final fine adjustment must be
made with the cover on.
Adjustment of burner head
The burners are equipped with an adjustment device
changing the position of the brake plate in the burner
head. This is used to adjust the corect pressure drop
over the combustion device and thereby obtain a good
pulsation free combustion.
Which position to use depends on input and
overpressure in the boiler.
A general rule is that the lower capacity the smaller the
opening between brake plate and combustion device.
Adjustment of brake plate
-
Turn by means of an allen key the screw in the
desired direction.
STG120/1, STG120/2, STG146/1
-
To reduce the opening: turn the screw to the left.
-
To increase the opening: turn the screw to the
right.
STG146/2
-
To reduce the opening: turn the screw to the
right.
-
To increase the opening: turn the screw to the
left.
The adjustment of the position of the brake plate affects
the air flow. It is therefore always necessary to make a
fine adjustment of the air by means of the adjustment
device of the burner.
Control of burner head
To check the burner head, brake plate and electrodes
proceed as follows:
Remove the cover. Loosen the union nut between inner
assembly and multi-bloc. Loosen the burner from the
flange and withdraw the burner from the boiler. If it is
necessary to remove the burner tube, loosen the two
allen screws, turn and withdraw the burner tube.
Commissioning of installation
Control of the combustion. The combustion quality is
checked by means of a flue gas analysis device. Adjust
the burner to appr. 20% excess air in accordance with
the table. Check the flue gas temperature. Calculate the
efficiency. Check also the actual gas volume on the gas
meter so that the correct input is achieved.
Gas quality
CO
2
%
lambda 1,2
0
2
%
max. CO
2
%
Natural gas
10,0
4±1
11,9
LPG
11,5
4±1
13,9
Summary of Contents for STG 120/2
Page 17: ...17 Bentone 4 9 Gas nozzle Inner assembly Natural LPG Natural gas LPG 2 5 8...
Page 35: ...35 Bentone 172 615 76 2020 10 16 2 9 1 Wiring diagram Gas burner control LME21...
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