Viessmann VITODENS 100-W WB1B Series Installation And Service Instructions Manual page 4

Table of Contents
Control Connections
Initial Start-up,
Inspection and
Maintenance
Troubleshooting
Additional Information
4
Electrical Connections..............................................................................37
Rotating the control unit and opening
the power / pump module.........................................................................37
Electrical connections to the power / pump module.....................................38
Optional operating control - Open Therm....................................................38
Closing the power / pump module and reinstalling the control unit................39
Reinstalling the front panel.......................................................................39
Necessary Tools......................................................................................40
Overview of Controls and Indicators..........................................................41
Overview of Components.........................................................................43
Procedure (Overview)...............................................................................44
Steps.....................................................................................................45
Troubleshooting Steps..............................................................................62
Overview of Controls and Indicators..........................................................62
Changing Room Temperature....................................................................63
Diagnosis...............................................................................................64
Sequence of operation and potential faults during each start-up cycle............64
Diagnostics table: Faults with fault display on control unit.............................65
How to reset faults..................................................................................66
Correction .............................................................................................67
Remove front panel.................................................................................67
Check boiler temperature sensor................................................................67
Check outdoor temperature sensor............................................................68
Determining the boiler set-point.................................................................69
Check fixed high limit...............................................................................70
Check flue gas temperature sensor............................................................70
Check fuses............................................................................................71
Electrical connections to the power / pump module
(room thermostat and DHW)....................................................................72
Input module description OT (Open Therm)
& 0-10V reset modules............................................................................73
Technical Data.......................................................................................74
Burner Program Sequence of Operation......................................................77
Wiring Diagram - natural gas / propane.......................................................79
Parts List...............................................................................................80
Maintenance Record................................................................................83
Lighting and Operating Instructions............................................................84
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