Riello DB 3 SE FGR Installation, Use And Maintenance Instructions page 33

5.7 Combustion air adjustment........................................................................................................................................ 22
5.7.1 Air / gas adjustment and output modulation .............................................................................................................. 23
5.7.2 Pressure switch adjustment ...................................................................................................................................... 23
5.8 Pressure switch adjustment ...................................................................................................................................... 23
5.8.1 Air pressure switch .................................................................................................................................................... 23
5.8.2 Maximum gas pressure switch .................................................................................................................................. 23
5.8.3 Minimum gas pressure switch ................................................................................................................................... 24
5.9 Final checks (with burner operating) ......................................................................................................................... 24
6 Maintenance.............................................................................................................................................................................. 25
6.1 Notes on safety for the maintenance......................................................................................................................... 25
6.2 Maintenance programme .......................................................................................................................................... 25
6.2.1 Maintenance frequency ............................................................................................................................................. 25
6.2.2 Safety test - with gas ball valve closed...................................................................................................................... 25
6.2.3 Safety components.................................................................................................................................................... 25
6.2.4 Checking and cleaning .............................................................................................................................................. 26
6.2.5 Dismantling the flame sensor .................................................................................................................................... 26
6.3 Opening the burner ................................................................................................................................................... 27
6.4 Closing the burner ..................................................................................................................................................... 27
7 Faults - Possible causes - Solutions ...................................................................................................................................... 28
Contents
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GB 20162773