User Guide

Application guidelines
3AB237986441643en-US0701
Content
Compressor model designation ..............4
Nomenclature ............................................................ 4
Danfoss scroll compression principle .....5
Features ..................................................... 6
Technical specications ...........................7
50 Hz data ................................................................... 7
60 Hz data ................................................................... 8
Dimensions ...............................................9
SM/SZ 084-090-100-110-120 ............................... 9
SM 112-124-SM/SZ147* ....................................... 10
SM/SZ147 code 3 ....................................................10
SM/SZ 148-161 ........................................................11
SM/SZ 175-185 & SY185 ....................................... 12
R and C version ........................................................12
SM/SZ 185 P, X, Y version .....................................13
SY 240-300-380 .......................................................14
Connection details ................................................. 15
Electrical data, connections and wiring 16
Motor voltage ..........................................................16
Wiring connections ...............................................16
IP rating ...................................................................... 17
Terminal box temperature ..................................17
Three phase electrical characteristics ............. 18
Danfoss MCI soft-start controller ...................... 19
General wiring information ................................20
Motor protection .................................................... 22
Voltage unbalance ................................................. 24
Approval and certications ...................25
Approvals and certicates...................................25
Pressure equipment directive 2014/68/EU ...25
Low voltage directive ...........................................25
Machines directives ............................................... 25
Internal free volume .............................................. 25
Operating conditions .............................26
Refrigerant and lubricants ..................................26
Motor supply ............................................................27
Compressor ambient temperature ..................27
Application envelope at dew temperatures . 27
Application envelopes at
mean temperatures .............................................. 30
Discharge temperature protection ................. 32
Maximum Operating Pressure (MOP)
protection .................................................................32
High and low pressure protection ...................32
Cycle rate limit ......................................................... 33
System design recommendations .........34
General ....................................................................... 34
Essential piping design considerations .......... 34
Refrigerant charge limit .......................................35
O-cycle migration ................................................ 35
Liquid ood back .................................................... 37
Specic application recommendations 38
Low ambient application ....................................38
Low load operations..............................................39
Brazed plate heat exchangers ...........................39
Electronic expansion valve .................................39
Reversible heat pump systems..........................39
Water utilizing systems ........................................41
Sound and vibration management .......42
Starting sound level ..............................................42
Running sound level .............................................42
Stopping sound level ............................................ 42
Sound generation in a refrigeration or air
conditioning system .............................................42
Installation ..............................................44
Compressor handling and storage ..................44
Compressor mounting .........................................44
Compressor holding charge ...............................45
System cleanliness .................................................45
Tubing ........................................................................45
Brazing and soldering ...........................................45
System pressure test .............................................47
Leak detection ......................................................... 47
Vacuum evacuation and moisture removal ..47
Filter driers ................................................................ 48
Refrigerant charging .............................................48
Insulation resistance and dielectric strength 48
Commissioning .......................................................49
Oil level checking and top-up ...........................49
Ordering information & packaging.......50
Packaging ................................................................. 50
Ordering information............................................50
Accessories ..............................................55