Viessmann Vitocrossal 200 CM2 186 Service Instruction page 5

Vitocrossal 200 CM2 186 to 311 Service
Burner Service
Burner Control Unit
Flow Diagram
Troubleshooting
Parts
Specifications
Wiring
Maintenance Record
Diaphragm Expansion Vessel and System Pressure........25
Check proper expansion tank and system pressures....25
Water Quality.........................................................25
Further Details Regarding the Individual Steps..............25
Fan pressure monitoring function (air pressure switch 1)..25
Combustion chamber pressure monitoring
(air pressure switch 2)............................................26
Gas Inlet pressure monitoring switch - GDW1............26
Valve seat pressure monitoring switch - GDW2..........26
Auxiliary Low Gas Pressure Switch.............................27
Gas Piping Components.............................................28
Burner Component Overview......................................29
CM2 pre-mix cylinder burner 186/246/311................29
Accessing the Boiler..................................................30
Burner Control..........................................................30
Burner Control Coding Card.......................................31
Burner Control Programming Unit................................32
Gas Valve (NG)........................................................32
Gas Valve (LPG)......................................................33
Air Pressure Switch...................................................34
2/2-Way Solenoid Valve (choke valve)
(for CM2 186 burner only).........................................34
Ignition Unit.............................................................35
Ignition Cable...........................................................35
Ignition Electrode Block.............................................36
Ionization Electrode Block...........................................36
Motorized Burner Inlet Damper....................................37
Inlet Damper Servomotor...........................................37
Inlet Damper Linkage.................................................38
Plug Console with Relay.............................................38
Burner Fan...............................................................39
Burner Tube.............................................................39
Burner Door.............................................................40
Burner Door Refractory..............................................41
Further Installation and Initial Start Up Instructions.......41
Burner Control Unit...................................................46
Resetting Operating Parameters to Factory Settings.........46
Manual Mode and Service Display...............................46
Burner Control Unit Flow Diagram...............................47
Faults......................................................................49
Fault display..........................................................49
Fault memory.........................................................49
Fault Codes..............................................................50
General process errors............................................50
Faults Without Fault Display.......................................53
Parts Lists................................................................54
Technical Data.........................................................60
Burner Control Unit Connection Diagram......................63
Maintenance Record..................................................64
Table of Contents
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