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
3FRCC.PC.026.A4.02
Application Guidelines
