8.7.1 C13/C33 concentric systems.............................................. 41
8.7.2 C13/C33 parallel systems.................................................. 44
8.7.3 C43/C53/C63 systems.......................................................46
8.8 Electrical connections........................................................ 47
8.8.1 Preparation......................................................................47
8.8.2 Mains power.................................................................... 48
8.8.3 Optional electrical connections............................................48
8.8.4 Finalization...................................................................... 50
8.9 Commissioning.................................................................51
8.9.1 Filling..............................................................................51
8.9.2 Air pressure differential..................................................... 51
8.9.3 Gas supply pressure..........................................................52
8.9.4 CO2 value........................................................................53
8.9.5 Turn on the water heater................................................... 54
8.10 Decommisioning...............................................................54
8.10.1 Turn off the water heater................................................... 54
8.10.2 Draining.......................................................................... 54
9 Conversion of gas type.............................................................. 55
10 Settings.....................................................................................57
10.1 Operator interface............................................................ 57
10.2 Parameters...................................................................... 57
10.3 Hysteresis....................................................................... 59
10.4 Error history.................................................................... 60
10.5 Test cycle........................................................................ 60
10.6 Legionella prevention........................................................ 60
11 Maintenance.............................................................................. 61
11.1 Performance check........................................................... 61
11.2 Preparation......................................................................62
11.3 Water-side maintenance.................................................... 62
11.3.1 Descale the tank.............................................................. 62
11.3.2 Clean the condensate drain................................................63
11.4 Gas-side maintenance....................................................... 63
11.4.1 Clean the burner.............................................................. 63
11.4.2 Clean the combustion chamber...........................................65
11.4.3 Assemble the burner.........................................................66
11.5 Finalization...................................................................... 66
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