Viessmann Vitocrossal 300 Series Service Instructions Manual page 5

Vitocrossal 300 CU3A 26 to 199 Service Vitocrossal 300 CU3A 26 to 199 Service
Service
Coding 1
Coding 2
Diagnosis and Service Scans
Troubleshooting
Function Description
Additional Information
Removing the Burner and Checking the Burner Gasket...22
Placing the Burner Door in the Service Retainer............22
Checking Burner Mesh Assembly and Refractory..........23
Check and Adjust Ignition and Ionization Electrodes......23
Cleaning the Combustion Chamber and Heating Surfaces..24
Separating the Neutralizing System (if installed)................24
Cleaning and Reconnecting the Condensate Drain System..25
Checking Gaskets and Thermal Insulation Components
on the Boiler.............................................................26
Checking the Diaphragm Expansion Vessel and
System Pressure.......................................................26
Fitting the Burner......................................................27
Clock Natural Gas Meter............................................27
Check CO Setting...................................................28
2
Combustion Management System...............................29
Check Functioning Safety Valves................................29
Check Electrical Connections......................................30
Check Gas Pipes and Fitting for Leaks.........................30
Check the Mixing Valve for Obstructions and Leaks......30
Example Layout 1.....................................................31
Example Layout 2.....................................................35
Example Layout 3.....................................................40
Example Layout 4.....................................................45
Start-up...................................................................46
Menu Heating Circuits...............................................47
Functional Description...............................................49
Adjusting the Heating Curves.....................................50
Connecting the Boiler tothe LON System.....................53
General...................................................................55
Boiler......................................................................56
DHW......................................................................57
Solar......................................................................57
Heating Circuit 1, 2 and 3.........................................58
General ..................................................................62
Boiler......................................................................69
DHW......................................................................70
Solar......................................................................72
Heating Circuit 1, 2 and 3.........................................76
Zone Heating Circuit 1, 2 and 3.................................81
Calling up the Service Level.......................................82
Diagnosis................................................................83
Checking Outputs (relay tests)...................................84
Fault Codes..............................................................85
Corrective Action......................................................93
Internal Extensions EA1............................................98
Control Functions...................................................100
Wiring Diagram.......................................................101
Fitting the Front Panel.............................................103
Burner Program Sequence of Operation.....................104
Parts Lists..............................................................105
Installation Fittings.................................................110
Technical Data.......................................................111
Maintenance Record................................................113
Lighting and Operating Instructions...........................114
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