
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