Table Of Contents - Danfoss MLM116 Application Manuallines

Application Guidelines
4
FRCC.PC.035.A5.02
Content
Features ................................................................................................................................ 6
Scroll compression principle .............................................................................................. 7
The scroll compression process.............................................................................................................................................................7
Compressor model designation ......................................................................................... 8
Nomenclature ..............................................................................................................................................................................................8
Label ................................................................................................................................................................................................................8
Serial number...............................................................................................................................................................................................8
Technical specifications ...................................................................................................... 9
50 Hz ...............................................................................................................................................................................................................9
Dimensions ........................................................................................................................ 10
MLM/MLZ116 ............................................................................................................................................................................................ 10
Suction and discharge connections ................................................................................................................................................. 11
Electrical data, connections and wiring ........................................................................... 12
Motor voltage ........................................................................................................................................................................................... 12
Wiring connections ................................................................................................................................................................................. 12
IP rating ....................................................................................................................................................................................................... 12
Terminal box temperature ................................................................................................................................................................... 12
Three phase electrical characteristics .............................................................................................................................................. 13
Suggested wiring diagrams logic ...................................................................................................................................................... 15
Approvals and certifications ............................................................................................. 17
Internal free volume ............................................................................................................................................................................... 17
Operating conditions ........................................................................................................ 18
Refrigerant and lubricants.................................................................................................................................................................... 18
Motor supply ............................................................................................................................................................................................. 19
Compressor ambient temperature ................................................................................................................................................... 19
Application envelope ............................................................................................................................................................................. 19
Maximum discharge gas temperature ............................................................................................................................................ 21
High and low pressure protection..................................................................................................................................................... 22
On/off cycling (cycle rate limit) .......................................................................................................................................................... 22
Defrost cycle .............................................................................................................................................................................................. 22
System design recommendations .................................................................................... 23
General ........................................................................................................................................................................................................ 23
Essential piping design considerations ........................................................................................................................................... 23
Refrigerant charge limit ....................................................................................................................................................................... 24
Off-cycle migration ................................................................................................................................................................................. 24
Liquid flood back ..................................................................................................................................................................................... 26
Specific application recommendations ........................................................................... 27
Low ambient application ...................................................................................................................................................................... 27
Scroll and reciprocating ........................................................................................................................................................................ 27
Low load operations ............................................................................................................................................................................... 28
Brazed plate heat exchangers ............................................................................................................................................................. 28
Water utilising systems .......................................................................................................................................................................... 28
Sound and vibration management .................................................................................. 29
Starting sound level................................................................................................................................................................................ 29
Running sound level .............................................................................................................................................................................. 29
Stopping sound level ............................................................................................................................................................................. 29
Sound generation in a refrigeration system .................................................................................................................................. 29
Compressor sound radiation ............................................................................................................................................................... 29
Mechanical vibrations ............................................................................................................................................................................ 30
Gas pulsation ............................................................................................................................................................................................ 30
Single compressors