Viessmann VITOCAL 250-A - Table of Contents

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1. Information Symbols ................................................................................................. 21
2. Introduction Scope of functions ................................................................................. 22
System examples .................................................................................. 22
3. Function description CAN bus system .................................................................................... 23
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CAN bus subscriber ............................................................................ 23
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Commissioning the CAN bus subscribers in a system network ......... 24
Defrost ................................................................................................... 24
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Defrost conditions ............................................................................... 25
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Defrosting is being prepared .............................................................. 25
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Defrost process .................................................................................. 27
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End of the defrost process .................................................................. 28
Heating/cooling ...................................................................................... 29
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System configuration .......................................................................... 29
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Determining the flow temperature with weather compensation .......... 30
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Control of the flow temperature for indoor units with 1 integral heat-
ing/cooling circuit ................................................................................ 31
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Control of the flow temperature for indoor units with 2 integral heat-
ing/cooling circuits .............................................................................. 31
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4/3-way valve position for heating/cooling demand ............................ 32
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Starting and stopping the compressor when heating/cooling is
required .............................................................................................. 36
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Changeover heating/cooling ............................................................... 37
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Auxiliary functions ............................................................................... 38
DHW heating ......................................................................................... 39
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Systems with DHW cylinder ............................................................... 39
Flow rate control with Hydro AutoControl .............................................. 43
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4/3-way valve ...................................................................................... 44
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Minimum flow rates ............................................................................. 45
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Adjusting minimum flow rates to the system hydraulics ..................... 46
Float air vent valve ................................................................................. 47
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Design ................................................................................................ 47
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Separation of refrigerant from the heating water ................................ 47
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Further components of the safety concept ......................................... 48
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Filling and venting the system ............................................................ 49
Emergency mode ................................................................................... 49
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Booster heaters for emergency mode ................................................ 50
4. System configuration Setting parameters ................................................................................ 51
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Setting parameters on the HMI programming unit .............................. 51
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Setting parameters via the ViGuide app ............................................. 51
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Setting parameters via ViGuide web applications .............................. 52
5. Commissioning assistant
parameter group
933 Type of heating/cooling circuit 1 ..................................................... 54
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933.0 Properties, heating/cooling circuit 1 .......................................... 54
934 Type of heating/cooling circuit 2 ..................................................... 54
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934.0 Properties, heating/cooling circuit 2 .......................................... 54
935 Type of heating/cooling circuit 3 ..................................................... 54
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935.0 Properties, heating/cooling circuit 3 .......................................... 54
936 Type of heating/cooling circuit 4 ..................................................... 54
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936.0 Properties, heating/cooling circuit 4 .......................................... 54
1415 Operating mode of heating/cooling circuit 1 ................................. 54
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1415.0 Operating mode of heating/cooling circuit 1 ........................... 54
1416 Operating mode of heating/cooling circuit 2 ................................. 55
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1416.0 Operating mode of heating/cooling circuit 2 ........................... 55
1417 Operating mode of heating/cooling circuit 3 ................................. 55
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1417.0 Operating mode of heating/cooling circuit 3 ........................... 55
1418 Operating mode of heating/cooling circuit 4 ................................. 55
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1418.0 Operating mode of heating/cooling circuit 4 ........................... 55
Index
Index
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