Viessmann Vitodens 222-F, Installation And Service Instructions Manual

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5
Fault messages ..................................................................................... 73
Repairs .................................................................................................. 89
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Shutting down the boiler ..................................................................... 89
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Draining the boiler on the heating water side ..................................... 90
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Checking the temperature sensors ..................................................... 91
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Information on replacing the HMU heat management unit and BCU
burner control unit ............................................................................... 93
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Checking the plate heat exchanger .................................................... 94
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Removing the hydraulic unit and return pipe ...................................... 95
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Replacing the power cable ................................................................. 96
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Checking the fuse ............................................................................... 97
8. Function description Control functions .................................................................................... 98
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Heating mode ..................................................................................... 98
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Venting program ................................................................................. 98
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Filling program .................................................................................... 98
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Heating curve ..................................................................................... 98
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Screed drying ..................................................................................... 100
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Raising the reduced room temperature .............................................. 102
DHW heating ......................................................................................... 103
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Heating the DHW loading cylinder from cold ...................................... 103
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Reheating when DHW is drawn off .....................................................103
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Increased DHW hygiene .....................................................................104
9. Connection and wiring dia-
gram
HMU heat management unit ..................................................................105
BCU burner control unit ......................................................................... 107
10. Commissioning/service
reports
................................................................................................................108
11. Specification Specification .......................................................................................... 109
Electronic combustion control unit ......................................................... 111
12. Disposal Final decommissioning and disposal ..................................................... 112
13. Certificates Declaration of conformity ....................................................................... 113
Manufacturer's certificate according to the 1st BImSchV [Germany] .... 113
14. Keyword index ................................................................................................................ 114
Index
Index
(cont.)
6130884