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Technical description of the burner
3
3.9
Burner equipment
The burner is supplied complete with:
Gas train flange
Flange gasket
4 screws to fix the M10x35 flange
Thermal insulation screen
3.10 Servomotor
The servomotor provides simultaneous adjustment for the air
damper, by means of the adjustable profile cam and the gas but-
terfly valve. The servomotor rotates by 130° in 42 seconds.
Do not alter the factory setting for the 5 cams;
simply check that they are set as indicated
below:
WARNING
Cam I: 130°
Limits rotation toward maximum position.
When the burner is at MAX output, the gas butterfly valve
must be fully open: 90°.
Cam II: 0°
Limits rotation toward minimum position.
When the burner is shut down, the air damper and gas butter-
fly valve must be closed: 0°.
Cam III: 20°
Adjusts the ignition position and the MIN output.
Cam IV-V: non used.
20032905
D3859
Fig. 7
9
4 screws to fix the M12x35 burner flange to the boiler
Fitting M20 x 1.5
Instruction manual
Spare parts list
GB
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