Viessmann Vitocal 350-G, Installation And Service Instructions For Contractors

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1. Information Disposal of packaging ............................................................................ 7
Symbols ................................................................................................. 7
Intended use .......................................................................................... 7
Product information ................................................................................ 8
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Type BW 351.B ................................................................................... 8
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Type BWS 351.B (heat pump stage 2) ............................................... 8
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System examples ............................................................................... 9
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Spare parts lists .................................................................................. 9
2. Preparing for installation Requirements regarding on-site connections ........................................ 10
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1-stage: Type BW 351.B ..................................................................... 10
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2-stage: Type BW 351.B + BWS 351.B .............................................. 11
Siting and transport requirements .......................................................... 11
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Transport ............................................................................................ 11
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Installation room requirements ........................................................... 12
3. Installation sequence Positioning the heat pump ..................................................................... 14
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Levelling the heat pump ..................................................................... 14
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Removing the transport brackets ........................................................ 15
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Removing the top panel ...................................................................... 16
Making the hydraulic connections .......................................................... 16
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Connecting the primary circuit ............................................................ 17
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Connecting the secondary circuit ....................................................... 17
Electrical connection .............................................................................. 18
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Preparing the electrical connections ................................................... 18
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Installing the programming unit (type BW 351.B) ............................... 19
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Routing cables to the wiring chamber ................................................ 20
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Making the electrical connection of heat pump stage 1 (type
BW 351.B) and stage 2 (type BWS 351.B) ......................................... 22
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Overview of electrical connections in the heat pump control unit
(type BW 351.B) ................................................................................. 23
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Main PCB (function components 230 V~) .......................................... 23
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Expansion PCB on main PCB (230 V~ components) ......................... 27
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Cross connect PCB (message and safety connections) .................... 31
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Controller and sensor PCB (sensors) ................................................. 33
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Connecting the primary circuit flow/return temperature sensor, 2-
stage heat pump ................................................................................. 34
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Swimming pool heating ...................................................................... 35
Power supply ......................................................................................... 35
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Heat pump control unit power supply 230 V~ ..................................... 36
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Compressor power supply 400 V~ ..................................................... 37
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Power supply with power-OFF: Without on-site load disconnect ....... 37
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Power supply with power-OFF: With on-site load disconnect ............ 39
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Mains power supply in conjunction with on-site power consumption . 42
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Smart Grid .......................................................................................... 42
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Phase monitor (if installed) ................................................................. 44
Make connections at terminals X3.8/X3.9 ............................................. 45
Closing the heat pump ........................................................................... 45
Checking the diaphragm grommets ....................................................... 48
4. Commissioning, inspec-
tion, maintenance
Steps - commissioning, inspection and maintenance ............................ 49
5. Maintenance Overview of wiring chamber .................................................................. 64
Opening the casing door ........................................................................ 64
Overview of internal components .......................................................... 65
Draining the heat pump on the primary/secondary side ........................ 66
Checking the sensors ............................................................................ 66
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Viessmann NTC 10 k
Ω
(blue marking) ............................................... 67
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Viessmann Pt500A (green marking) ................................................... 68
Index
Index
5855006