Viessmann B2TF - Page 7

7
Further messages .................................................................................. 95
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Service messages .............................................................................. 95
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Status messages ................................................................................ 95
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Warning messages ............................................................................. 95
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Information .......................................................................................... 96
Repairs .................................................................................................. 96
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Shutting down the boiler ..................................................................... 96
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Draining the boiler on the heating water side ..................................... 97
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Checking the temperature sensors ..................................................... 98
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Information on replacing the HMU heat management unit and BCU
burner control unit ...............................................................................100
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Checking the plate heat exchanger .................................................... 101
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Removing the hydraulic unit and return pipe ...................................... 102
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Replacing the power cable ................................................................. 103
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Checking the fuse ............................................................................... 104
8. Function description Control functions ....................................................................................105
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Heating mode ..................................................................................... 105
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Venting program ................................................................................. 105
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Filling program .................................................................................... 105
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Heating curve ..................................................................................... 105
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Screed drying ..................................................................................... 107
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Raising the reduced room temperature .............................................. 109
DHW heating ......................................................................................... 110
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Heating the DHW loading cylinder from cold ...................................... 110
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Reheating when DHW is drawn off ..................................................... 110
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Increased DHW hygiene ..................................................................... 111
External heating circuit hook-up (if installed) ......................................... 111
9. Connection and wiring dia-
gram
HMU heat management unit .................................................................. 112
BCU burner control unit ......................................................................... 114
10. Commissioning/service
reports
................................................................................................................ 115
11. Specification Specification .......................................................................................... 116
Flue system types .................................................................................. 119
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Gas categories ................................................................................... 119
Electronic combustion control unit ......................................................... 120
12. Disposal Final decommissioning and disposal ..................................................... 121
13. Certificates Declaration of conformity ....................................................................... 122
Manufacturer's certificate according to the 1st BImSchV [Germany] .... 122
14. Keyword index ................................................................................................................123
Index
Index (cont.)
6151778