
© Danfoss | Climate Solutions | 2022.03
Features................................................................................................................................ 6
Scroll compression principle .............................................................................................. 7
Nomenclature..............................................................................................................................................................................................8
Label................................................................................................................................................................................................................8
Serial number...............................................................................................................................................................................................8
Technical specifications ...................................................................................................... 9
50 Hz ...............................................................................................................................................................................................................9
Dimensions ........................................................................................................................ 10
MLM/MLZ090............................................................................................................................................................................................ 10
MLM/MLZ130............................................................................................................................................................................................ 11
MLM/MLZ160-200-240.......................................................................................................................................................................... 12
MLM/MLZ116............................................................................................................................................................................................ 13
Suction and discharge connections ................................................................................................................................................. 14
Electrical data, connections and wiring........................................................................... 15
Motor voltage ........................................................................................................................................................................................... 15
Wiring connections................................................................................................................................................................................. 15
IP rating....................................................................................................................................................................................................... 16
Terminal box temperature ................................................................................................................................................................... 16
Three phase electrical characteristics .............................................................................................................................................. 16
Suggested wiring diagrams logic...................................................................................................................................................... 17
Approvals and certifications............................................................................................. 20
Internal free volume............................................................................................................................................................................... 20
Operating conditions ........................................................................................................ 21
Refrigerant and lubricants.................................................................................................................................................................... 21
Motor supply............................................................................................................................................................................................. 22
Compressor ambient temperature ................................................................................................................................................... 22
Application envelope............................................................................................................................................................................. 22
Maximum discharge gas temperature ............................................................................................................................................ 25
High and low pressure protection..................................................................................................................................................... 26
On/off cycling (cycle rate limit) .......................................................................................................................................................... 26
System design recommendations.................................................................................... 27
General........................................................................................................................................................................................................ 27
Essential piping design considerations........................................................................................................................................... 27
Refrigerant charge limit ....................................................................................................................................................................... 28
Off-cycle migration................................................................................................................................................................................. 28
Liquid flood back..................................................................................................................................................................................... 30
Low ambient application...................................................................................................................................................................... 31
Scroll and reciprocating........................................................................................................................................................................ 32
Low load operations............................................................................................................................................................................... 32
Brazed plate heat exchangers............................................................................................................................................................. 32
Water utilising systems.......................................................................................................................................................................... 32
Sound and vibration management.................................................................................. 33
Starting sound level................................................................................................................................................................................ 33
Running sound level .............................................................................................................................................................................. 33
Stopping sound level............................................................................................................................................................................. 33
Sound generation in a refrigeration system.................................................................................................................................. 33
Compressor sound radiation............................................................................................................................................................... 33
Mechanical vibrations............................................................................................................................................................................ 34
Gas pulsation ............................................................................................................................................................................................ 34
Content
4AB243586442698en-000601
Application Guidelines Single compressors