Riello RS 68/E O2 ULX Installation, Use And Maintenance Instructions page 4

5.4.2 Air/fuel adjustment and output modulation system ....................................................................................................34
5.4.3 Burner adjustment......................................................................................................................................................34
5.4.4 Output upon ignition ...................................................................................................................................................34
5.4.5 Maximum output ........................................................................................................................................................34
5.4.6 Minimum output .........................................................................................................................................................35
5.5 Final calibration of the pressure switches ..................................................................................................................36
5.5.1 Air pressure switch.....................................................................................................................................................36
5.5.2 Maximum gas pressure switch...................................................................................................................................36
5.5.3 Minimum gas pressure switch....................................................................................................................................37
5.5.4 PVP pressure switch kit .............................................................................................................................................37
5.6 Operation ...................................................................................................................................................................38
5.7 Motor lockout .............................................................................................................................................................38
5.8 Ignition failure.............................................................................................................................................................38
5.9 Burner flame goes out during operation.....................................................................................................................38
5.10 Stopping of the burner ...............................................................................................................................................39
5.11 Final checks (with burner operating) ..........................................................................................................................39
5.12 Description of O2 trim control (optional) ....................................................................................................................40
5.12.1 Operating principle of O2 trim control ........................................................................................................................40
6 Maintenance ..............................................................................................................................................................................41
6.1 Notes on safety for the maintenance .........................................................................................................................41
6.2 Maintenance programme ...........................................................................................................................................41
6.2.1 Maintenance frequency..............................................................................................................................................41
6.2.2 Safety test - with gas feeding closed .........................................................................................................................41
6.2.3 Checking and cleaning...............................................................................................................................................41
6.2.4 Checking the air and gas pressure on the combustion head .....................................................................................42
6.2.5 Safety components ....................................................................................................................................................42
6.3 Opening the burner ....................................................................................................................................................43
6.4 Closing the burner......................................................................................................................................................43
A Appendix - Accessories ...........................................................................................................................................................44
B Appendix - Electrical panel layout...........................................................................................................................................45
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