Danfoss VZH028 Application Manuallines page 5

Application Guidelines VZH028-035-044 - single compressors
Operating conditions ........................................................................................................ 25
Application envelopes ............................................................................................................................................................................ 25
Short cycle timer function ..................................................................................................................................................................... 25
Discharge gas thermostat ..................................................................................................................................................................... 26
Oil return management function (single compressor) ............................................................................................................... 27
Oil return management in hybrid manifolding ............................................................................................................................. 27
High and low pressure protection...................................................................................................................................................... 28
System design recommendations .................................................................................... 29
Essential piping design considerations ............................................................................................................................................ 29
Heat exchangers ....................................................................................................................................................................................... 30
Refrigerant charge limits ....................................................................................................................................................................... 30
Off-cycle migration .................................................................................................................................................................................. 30
Liquid floodback during operation .................................................................................................................................................... 31
Specific application recommendations ........................................................................... 32
Low ambient compressor operations ............................................................................................................................................... 32
Brazed plate heat exchangers .............................................................................................................................................................. 33
Reversible heat pump systems ............................................................................................................................................................ 33
Sound and vibration management .................................................................................. 35
Running sound level ............................................................................................................................................................................... 35
Sound generation in a refrigeration or air conditioning system ............................................................................................. 35
Compressor sound radiation ................................................................................................................................................................ 35
Mechanical vibrations ............................................................................................................................................................................. 35
Speed by-pass ............................................................................................................................................................................................ 35
Gas pulsation ............................................................................................................................................................................................. 35
Installation ......................................................................................................................... 36
Compressor handling ............................................................................................................................................................................. 36
Mounting ..................................................................................................................................................................................................... 36
Removing connections shipping plugs ........................................................................................................................................... 36
System cleanliness ................................................................................................................................................................................... 37
Tubing ........................................................................................................................................................................................................... 37
Filter driers .................................................................................................................................................................................................. 37
Brazing and soldering ............................................................................................................................................................................. 37
Compressor connection ......................................................................................................................................................................... 37
High voltage test ...................................................................................................................................................................................... 38
Leak detection ........................................................................................................................................................................................... 39
Vacuum pump down and moisture removal ................................................................................................................................. 39
Refrigerant charging ............................................................................................................................................................................... 39
Commissioning ......................................................................................................................................................................................... 39
Oil level checking and top-up .............................................................................................................................................................. 40
Trouble shooting ............................................................................................................... 41
Ordering information and packaging .............................................................................. 44
Kit ordering and shipping ..................................................................................................................................................................... 44
Packaging .................................................................................................................................................................................................... 44
Ordering information .............................................................................................................................................................................. 44
VZH converter order information ....................................................................................................................................................... 45
Accessories ......................................................................................................................... 46
Valves, adapters, connectors & gaskets for use on suction and discharge connections ................................................ 46
Crankcase heaters & thermostats ....................................................................................................................................................... 46
Lubricant, acoustic hoods and spare parts ..................................................................................................................................... 46
Spare parts frequency converter ........................................................................................................................................................ 47
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FRCC.PC.034.A2.02