Viessmann B2TF Installation And Service Instructions Manual page 7

Gas condensing storage combi boiler with 7 inch colour touchscreen
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Index
(cont.)
reports
11.
Further messages .................................................................................. 95
Service messages .............................................................................. 95
Status messages ................................................................................ 95
Warning messages ............................................................................. 95
Information .......................................................................................... 96
Repairs .................................................................................................. 96
Shutting down the boiler ..................................................................... 96
Draining the boiler on the heating water side ..................................... 97
Checking the temperature sensors ..................................................... 98
burner control unit ...............................................................................100
Checking the plate heat exchanger .................................................... 101
Removing the hydraulic unit and return pipe ...................................... 102
Replacing the power cable ................................................................. 103
Checking the fuse ............................................................................... 104
Control functions ....................................................................................105
Heating mode ..................................................................................... 105
Venting program ................................................................................. 105
Filling program .................................................................................... 105
Heating curve ..................................................................................... 105
Screed drying ..................................................................................... 107
Raising the reduced room temperature .............................................. 109
DHW heating ......................................................................................... 110
Heating the DHW loading cylinder from cold ...................................... 110
Reheating when DHW is drawn off ..................................................... 110
Increased DHW hygiene ..................................................................... 111
External heating circuit hook-up (if installed) ......................................... 111
HMU heat management unit .................................................................. 112
BCU burner control unit ......................................................................... 114
................................................................................................................ 115
Specification .......................................................................................... 116
Flue system types .................................................................................. 119
Gas categories ................................................................................... 119
Electronic combustion control unit ......................................................... 120
Final decommissioning and disposal ..................................................... 121
Declaration of conformity ....................................................................... 122
................................................................................................................123
Index
7

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