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7.2 Conditions....................................................................... 53
7.2.1 Ambient conditions........................................................... 53
7.2.2 Maximum floor load.......................................................... 53
7.2.3 Water composition............................................................54
7.2.4 Working clearances...........................................................54
7.2.5 Storage tank working clearances........................................ 55
7.3 Installation diagram..........................................................56
7.4 Water connections............................................................ 57
7.4.1 Unvented water connections.............................................. 57
7.4.2 Vented water connections..................................................58
7.5 Gas connection.................................................................59
7.6 Solar heating system........................................................ 59
7.7 Venting system................................................................ 59
7.7.1 C13/C33 concentric systems.............................................. 61
7.7.2 C13/C33 parallel systems.................................................. 62
7.7.3 C43/C53/C63 systems.......................................................64
7.8 Electrical connections........................................................ 65
7.8.1 Preparation......................................................................66
7.8.2 Mains power.................................................................... 66
7.8.3 Optional electrical connections............................................67
7.8.4 Electrical connection of the solar heating system...................68
7.9 Commissioning.................................................................70
7.9.1 Filling..............................................................................70
7.9.2 Procedure for checking the supply pressure..........................72
7.9.3 Procedure for checking the gas control valve pressure........... 74
7.9.4 CO
2
adjustment............................................................... 75
7.9.5 Switching pressure measurement....................................... 77
7.9.6 Turn on the water heater...................................................78
7.10 Decommisioning...............................................................78
7.10.1 Turn off the water heater...................................................78
7.10.2 Draining.......................................................................... 78
8 Conversion of gas type.............................................................. 81
9 Settings.....................................................................................83
9.1 Operator interface............................................................ 83
9.2 Service program...............................................................83
9.2.1 Hysteresis....................................................................... 83
9.2.2 Display the error history.................................................... 84
9.2.3 Display the water heater history......................................... 84
0311753_SGS_28-120_II_UKUK_V2.0 , 2017-05-03 11
11


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