Viessmann VITODENS 222-F Installation And Service Instructions Manual page 5

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