VZH088-117-170 single compressors
Operating conditions .........................................................................................................41
Application envelopes .............................................................................................................................................................................41
Short cycle timer function ......................................................................................................................................................................41
Discharge gas temperature protection function ...........................................................................................................................42
Discharge gas thermostat ......................................................................................................................................................................42
Oil return management function (single compressor) ................................................................................................................43
Oil return management in hybrid manifolding ..............................................................................................................................43
High and low pressure protection.......................................................................................................................................................43
System design recommendations .....................................................................................45
Essential piping design considerations .............................................................................................................................................45
Oil management ........................................................................................................................................................................................46
Heat exchangers ........................................................................................................................................................................................48
Refrigerant charge limits ........................................................................................................................................................................48
O-cycle migration ...................................................................................................................................................................................48
Liquid oodback during operation .....................................................................................................................................................49
Specic application recommendations ............................................................................50
Low ambient compressor operations ................................................................................................................................................50
Brazed plate heat exchangers ...............................................................................................................................................................51
Reversible heat pump systems .............................................................................................................................................................51
Defrost cycle logic .....................................................................................................................................................................................53
Sound and vibration management ...................................................................................54
Running sound level ................................................................................................................................................................................54
Sound generation in a refrigeration or air conditioning system ..............................................................................................54
Compressor sound radiation .................................................................................................................................................................54
Mechanical vibrations ..............................................................................................................................................................................54
Speed by-pass .............................................................................................................................................................................................54
Gas pulsation ..............................................................................................................................................................................................54
Installation ..........................................................................................................................55
Compressor handling ..............................................................................................................................................................................55
Mounting ......................................................................................................................................................................................................55
Removing connections shipping plugs ............................................................................................................................................55
System cleanliness ....................................................................................................................................................................................56
Tubing ............................................................................................................................................................................................................56
Filter driers ...................................................................................................................................................................................................56
Brazing and soldering ..............................................................................................................................................................................56
Compressor connection ..........................................................................................................................................................................56
High voltage test .......................................................................................................................................................................................57
System pressure test ................................................................................................................................................................................58
Leak detection ............................................................................................................................................................................................58
Vacuum pump down and moisture removal ..................................................................................................................................58
Refrigerant charging ................................................................................................................................................................................58
Loss of charge protection ....................................................................................................................................................................... 58
Commissioning ..........................................................................................................................................................................................59
Oil level checking and top-up ............................................................................................................................................................... 59
Troubleshooting .................................................................................................................60
Ordering information and packaging ...............................................................................63
Kit ordering and shipping ......................................................................................................................................................................63
Packaging .....................................................................................................................................................................................................63
Ordering information ...............................................................................................................................................................................63
VZH voltage code G - 380-480 Volt ....................................................................................................................................................65
VZH voltage code H - 525-600 Volt ....................................................................................................................................................65
VZH voltage code J - 200-240 Volt .......................................................................................................................................................66
Accessories ..........................................................................................................................67
Valves, adapters, connectors & gaskets for use on suction and discharge connections ................................................. 67
Crankcase heaters & thermostats ........................................................................................................................................................67
Lubricant, acoustic hoods and spare parts ......................................................................................................................................67
Spare parts frequency converter .........................................................................................................................................................68
4 FRCC.PC.023.A8.02
Application Guidelines