Danfoss MLZ/MLM090-116-130-160-200-240, Application Manuallines, Page: 44 / 64

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General overview ............................................................................................................... 45
Scope ........................................................................................................................................................................................................... 45
Benefits........................................................................................................................................................................................................ 45
Oil management concept .................................................................................................. 46
Active systems .......................................................................................................................................................................................... 46
Passive systems ........................................................................................................................................................................................ 47
Operating conditions ........................................................................................................ 49
Power supply ............................................................................................................................................................................................. 49
Compressor ambient temperature ................................................................................................................................................... 49
Operating envelope................................................................................................................................................................................ 49
Refrigerants and lubricants .................................................................................................................................................................. 49
Discharge temperature protection ................................................................................................................................................... 49
High and low pressure protection..................................................................................................................................................... 49
Cycle rate limit .......................................................................................................................................................................................... 49
Defrost cycle .............................................................................................................................................................................................. 50
Sump dilution control ............................................................................................................................................................................ 50
System design recommendations .................................................................................... 51
Essential piping design considerations ........................................................................................................................................... 51
Expansion device ..................................................................................................................................................................................... 52
Suction accumulator .............................................................................................................................................................................. 52
Suction header ......................................................................................................................................................................................... 52
Oil level regulator .................................................................................................................................................................................... 53
Oil separator / oil reservoir ................................................................................................................................................................... 53
Oil separator and reservior for active system ................................................................................................................................ 54
Installation and service ..................................................................................................... 55
Piping design ............................................................................................................................................................................................ 55
Wiring and rotation direction ............................................................................................................................................................. 55
Failure analysis .......................................................................................................................................................................................... 55
Ordering information ........................................................................................................ 56
Tandem unit MLM/MLZ116 ............................................................................................... 57
Operating principle ................................................................................................................................................................................ 57
Composition of MLM/MLZ116 tandem ........................................................................................................................................... 57
Compressor mounting .......................................................................................................................................................................... 58
Oil equalization connection ................................................................................................................................................................ 58
Trio unit MLM/MLZ116 ...................................................................................................... 59
Operating principle ................................................................................................................................................................................ 59
Composition of MLM/MLZ116 trio .................................................................................................................................................... 59
Compressor mounting .......................................................................................................................................................................... 60
Quadro unit MLZ/MLZ116 ................................................................................................ 61
Operating principle ................................................................................................................................................................................ 61
Composition of MLM/MLZ116 quadro ............................................................................................................................................ 61
Compressor mounting .......................................................................................................................................................................... 62
Content
All manifolding information is only for MLZ/MLM116
44
AB243586442698en-000601
Application Guidelines Manifold compressors