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Maintenance
UV scanner
Clean the glass cover from any dust that may have accumulated.
In order to reach the UV scanner, unscrew the screw 1)(Fig. 36)
and extract the flame sensor with the relevant support 2).
1
D10440
Fig. 36
Combustion head
Open the burner and make sure that all components of the com-
bustion head are in good condition, not deformed by the high tem-
peratures, free of impurities from the surroundings and correctly
positioned.
Burner
Check for excess wear or loose screws in the mechanisms con-
trolling the air damper and the gas butterfly valve.
Also make sure that the screws securing the electrical leads in the
burner connections are fully tightened.
Combustion checks
CO
2
It is better to set the burner with CO
not higer than 10% (with nat-
2
ural gas). In this way avoiding a loss of calibration setting (for ex-
ample draft variation) that could cause combustion with little air and
the production of CO.
CO
It must be not higher than 400 PPM.
20027066
32
GB
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