Content
Scroll compression principle .......................... 4
Features ............................................................ 5
Compressor model designation ..................... 6
Nomenclature .......................................................................6
Technical specifications .................................. 7
50 Hz data ..............................................................................7
Dimensions ...................................................... 8
CH290 ......................................................................................8
CH290 - Parallel version .....................................................9
CH485 ....................................................................................10
Suction and discharge Connections ...........................11
Electrical data, connections and wiring ....... 12
Connection details ...........................................................12
Motor voltage .....................................................................12
Wiring connections ...........................................................13
IP rating .................................................................................13
Terminal box temperature .............................................13
Three phase electrical characteristics ........................14
LRA (Locked Rotor Amp) .................................................14
MCC (Maximum Continuous Current) ........................14
Max. Operating Current. .................................................14
Winding resistance............................................................14
General wiring information ...........................................14
Danfoss MCI soft-start controller .................................15
Motor protection ...............................................................17
Voltage imbalance ............................................................17
Operating conditions .................................... 18
Refrigerant and lubricants..............................................18
Motor supply .......................................................................19
Compressor ambient temperature .............................19
Application envelope .......................................................19
Discharge temperature protection ............................20
High and low pressure protection...............................20
Cycle rate limit ....................................................................21
System design recommendations ................ 22
General ..................................................................................22
Essential piping design recommendations ..............22
Refrigerant charge limit ..................................................23
Off-cycle migration ...........................................................24
Liquid flood back ...............................................................26
Specific application recommendations ....... 27
Low ambient application ................................................27
Low load operation ...........................................................28
Brazed plate heat exchangers .......................................28
Electronic expansion valve ............................................28
Reversible heat pump systems .....................................28
Sound and vibration management .............. 31
Starting sound level..........................................................31
Running sound level ........................................................31
Stopping sound level .......................................................31
Installation ..................................................... 33
Compressor handling and storage..............................33
Compressor mounting ....................................................34
Compressor holding charge ..........................................34
System cleanliness ............................................................35
Tubing ....................................................................................35
Brazing and soldering ......................................................35
System pressure test ........................................................36
Leak detection ....................................................................37
Vacuum evacuation and moisture removal .............37
Filter driers ...........................................................................37
Refrigerant charging ........................................................37
Insulation resistance and dielectric strength ..........38
Commissioning ..................................................................38
Oil level checking and top-up .......................................38
Ordering information and packaging .......... 39
Accessories ..................................................... 40
3
FRCC.PC.026.A4.02
Application Guidelines
