Application guidelines
5FRCC.PC.023.A7.22
Single compressors
VZH088-117-170 single compressors
Operating conditions .........................................................................................................................43
Application envelopes ............................................................................................................................................................................ 43
Short cycle timer function .....................................................................................................................................................................43
Discharge gas temperature protection function .......................................................................................................................... 44
Discharge gas thermostat .....................................................................................................................................................................44
Oil return management function (single compressor) ............................................................................................................... 45
Oil return management in hybrid manifolding .............................................................................................................................45
High and low pressure protection......................................................................................................................................................45
System design recommendations .....................................................................................................47
Essential piping design considerations ............................................................................................................................................ 47
Oil management .......................................................................................................................................................................................48
Heat exchangers .......................................................................................................................................................................................50
Refrigerant charge limits .......................................................................................................................................................................50
O-cycle migration .................................................................................................................................................................................. 50
Liquid oodback during operation ....................................................................................................................................................51
Specic application recommendations ............................................................................................52
Low ambient compressor operations ............................................................................................................................................... 52
Brazed plate heat exchangers ..............................................................................................................................................................53
Reversible heat pump systems ............................................................................................................................................................53
Defrost cycle logic .................................................................................................................................................................................... 54
Sound and vibration management ...................................................................................................56
Running sound level ...............................................................................................................................................................................56
Sound generation in a refrigeration or air conditioning system .............................................................................................56
Compressor sound radiation ................................................................................................................................................................56
Mechanical vibrations .............................................................................................................................................................................56
Speed by-pass ............................................................................................................................................................................................57
Gas pulsation .............................................................................................................................................................................................57
Installation ..........................................................................................................................................58
Compressor handling .............................................................................................................................................................................58
Mounting .....................................................................................................................................................................................................58
Removing connections shipping plugs ...........................................................................................................................................58
System cleanliness ...................................................................................................................................................................................59
Tubing ...........................................................................................................................................................................................................59
Filter driers ..................................................................................................................................................................................................59
Brazing and soldering .............................................................................................................................................................................59
Compressor connection .........................................................................................................................................................................59
High voltage test ......................................................................................................................................................................................61
System pressure test ...............................................................................................................................................................................61
Leak detection ........................................................................................................................................................................................... 62
Vacuum pump down and moisture removal .................................................................................................................................62
Refrigerant charging ...............................................................................................................................................................................62
Loss of charge protection ......................................................................................................................................................................62
Commissioning .........................................................................................................................................................................................62
Oil level checking and top-up ..............................................................................................................................................................63
Troubleshooting .................................................................................................................................64
Ordering information and packaging ...............................................................................................67
Kit ordering and shipping .....................................................................................................................................................................67
Packaging .................................................................................................................................................................................................... 67
Ordering information ..............................................................................................................................................................................67
VZH voltage code G - 380-480 Volt ...................................................................................................................................................69
VZH voltage code G - 525-480 Volt ...................................................................................................................................................69
VZH voltage code J - 200-240 Volt ......................................................................................................................................................70
Accessories ..........................................................................................................................................71
Valves, adapters, connectors & gaskets for use on suction and discharge connections ................................................71
Crankcase heaters & thermostats ....................................................................................................................................................... 71
Lubricant, acoustic hoods and spare parts ..................................................................................................................................... 71
Spare parts frequency converter ........................................................................................................................................................ 72
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