8.8.1 Preparation......................................................................45
8.8.2 Mains power.................................................................... 46
8.8.3 External ON mode switch (optional).................................... 47
8.8.4 Finalization...................................................................... 47
8.9 Commissioning.................................................................47
8.9.1 Filling..............................................................................47
8.9.2 Air pressure differential..................................................... 47
8.9.3 Gas supply pressure..........................................................48
8.9.4 CO2 value........................................................................49
8.9.5 Turn on the water heater................................................... 50
8.10 Decommisioning...............................................................50
8.10.1 Turn off the water heater................................................... 50
8.10.2 Draining.......................................................................... 50
9 Conversion of gas type.............................................................. 51
10 Settings.....................................................................................53
10.1 Display............................................................................53
10.2 Temperatures...................................................................53
10.2.1 Temperatures...................................................................54
10.2.2 Hysteresis....................................................................... 54
10.3 Appliance Status...............................................................55
10.4 Display settings................................................................55
10.4.1 Set the display brightness..................................................55
10.4.2 Set the backlight delay......................................................56
10.4.3 Set the language.............................................................. 56
10.5 Appliance information........................................................57
10.5.1 Use external enable.......................................................... 57
10.5.2 Ignition attempts..............................................................57
10.6 Error history.................................................................... 58
10.7 Error occurrence...............................................................59
10.8 Restore default.................................................................59
10.9 Service menu...................................................................60
10.9.1 Set the service mode........................................................ 60
10.9.2 Set the fan speed............................................................. 61
11 Maintenance.............................................................................. 63
11.1 Performance check........................................................... 63
11.2 Preparation......................................................................64
11.3 Water-side maintenance.................................................... 64
11.3.1 Descale the tank.............................................................. 64
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