Viessmann PLC VITOCAL 350-HT PRO Service Instructions For Contractors page 5

Index
(cont.)
6. PCBs and connection
options
7. Commissioning/service
reports
8. Certificates
9. Keyword index
2-way valve, natural cooling ............................................................... 50
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System status ........................................................................................ 51
Testing the temperature sensors ........................................................... 51
Main PCB ............................................................................................... 53
Expansion PCB ...................................................................................... 55
Control parameter report ....................................................................... 57
Heating water buffer cylinder (HWB) and high temperature mainte-
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nance .................................................................................................. 57
Domestic hot water (DHW) ................................................................. 57
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Coolant buffer cylinder ........................................................................ 58
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Compressor ........................................................................................ 58
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Applicatn limits .................................................................................... 58
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General ............................................................................................... 59
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Electronic expansion valve (EEV) ...................................................... 59
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Internal heat exchanger (IHE) ............................................................ 59
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Circulation pumps (CP) ...................................................................... 59
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Declaration of conformity ....................................................................... 60
................................................................................................................ 61
Index
5