Viessmann VITOLIGNO 250-S Operating Instructions Manual page 5

Index
6. Further adjustments
7. Information call up
8. Prolonged heating system
shutdown
9. Operation with pressure-
jet oil/gas burner (if instal-
led)
10. What to do if...
11. Maintenance
12. Ordering fuel
Operating program ................................................................................. 28
Setting the operating program for DHW heating ................................ 28
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Time program ........................................................................................ 28
Setting the time program for DHW heating ......................................... 28
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Setting time phases ............................................................................ 29
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Deleting a time phase ......................................................................... 29
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Resetting time phases to the factory settings ..................................... 29
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Stopping DHW heating .......................................................................... 29
Setting the display contrast .................................................................... 31
Setting the brightness of the display ...................................................... 31
Assigning names to heating circuits ...................................................... 31
Setting the time and date ....................................................................... 32
Language selection ................................................................................ 32
Setting the temperature unit (°C/°F) ...................................................... 32
Setting the boiler water temperature ...................................................... 33
Adjusting the set value for residual oxygen ........................................... 33
Setting the minimum system temperature ............................................. 33
Restoring factory settings ...................................................................... 33
Calling up information ............................................................................ 35
Calling up information in the standard menu ...................................... 35
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Calling up information in the extended menu ..................................... 35
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Calling up temperatures ..................................................................... 36
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Calling up fault messages ...................................................................... 36
Displaying a fault message ................................................................. 36
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Calling up a fault message ................................................................. 37
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Calling up an acknowledged fault message ....................................... 37
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Prolonged heating system shutdown ..................................................... 38
Shutdown ............................................................................................... 38
Pressure-jet oil/gas burner operation ..................................................... 39
Retracting the pressure-jet oil/gas burner .......................................... 39
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Starting the pressure-jet oil/gas burner .............................................. 39
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Stopping the pressure-jet oil/gas burner ............................................. 39
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Extending the pressure-jet oil/gas burner ........................................... 39
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Rooms are too cold ................................................................................ 40
Rooms are too hot ................................................................................. 40
There is no hot water ............................................................................. 41
The DHW is too hot ............................................................................... 41
"Fault" is shown in the display ............................................................... 41
is displayed ...................................................................................... 41
Heating system inspection and maintenance ........................................ 42
Boiler .................................................................................................. 42
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DHW cylinder (if installed) .................................................................. 42
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Safety valve (DHW cylinder) ............................................................... 42
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Drinking water filter (if installed) ......................................................... 42
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Replacing fuses ..................................................................................... 42
Information on cleaning ......................................................................... 42
Maintenance intervals ............................................................................ 43
Cleaning the ash chamber ..................................................................... 44
Cleaning the tubular heat exchanger ..................................................... 45
Emptying the tubular heat exchanger ash pan ...................................... 46
Cleaning the sight glass ......................................................................... 46
Cleaning the combustion chamber ........................................................ 47
Wood fuel ingredients ............................................................................ 48
Influence of the moisture content ....................................................... 48
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Index
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