Table Of Contents - Danfoss VRJ Application Manuallines

Application Guidelines Content
Introduction ................................................... 4
Scroll compressor components ....................................4
Compressor size ..................................................................4
Performance .........................................................................4
Compressor model designation ................... 5
Nomenclature ......................................................................5
Label........................................................................................5
Serial number ......................................................................5
Technical speci cations ................................ 6
Compressor speci cations ..............................................6
Performance data ..............................................................6
Variable speed drive speci cations .............................6
Bearings lubrication ..........................................................6
Dimensions .................................................... 7
VRJ 028 - 035 - 044 .............................................................7
Mounting grommet ..........................................................7
Electrical data, connections and wiring ....... 8
Supply Voltage ...................................................................8
Compressor electrical speci cations ...........................8
LRA (Locked Rotor Amp)..................................................8
MCC (Maximum Continuous Current) ........................8
Winding resistance ............................................................8
Wiring connections ..........................................................9
Terminal cover mounting ................................................9
Terminal cover removal ....................................................9
IP rating ..................................................................................9
Internal motor protection ...............................................9
Phase sequence and reverse rotation protection ..9
Approvals and certi cates ........................... 10
Approval and certi cates ...............................................10
Pressure equipment directive 97/23/EC ..................10
Low voltage directive 73/23/EC, 93/68/EC...............10
Internal free volume .........................................................10
Operating conditions ................................... 11
Refrigerant and lubricants .............................................11
Motor supply.......................................................................11
Compressor ambient temperature .............................11
Application envelope ......................................................12
High and low pressure protection ..............................13
Crankcase heating ............................................................13
Oil return management ..................................................13
On/o cycling (cycle rate limit) ....................................14
Start-up sequence .............................................................14
System design recommendations .............. 15
General ..................................................................................15
Essential piping design considerations .....................15
Refrigerant charge limit .................................................16
Reversible heat pump systems ....................................16
Minimum sump superheat ............................................16
Preventing liquid ood back ........................................16
Water utilising systems ..................................................17
Loss of charge protection...............................................17
Oil level checking and top-up ......................................17
Sound and vibration management ............. 18
Starting sound level .........................................................18
Running sound level ........................................................18
Stopping sound level .......................................................18
Sound generation in a refrigeration system and air
conditioning system ........................................................18
Installation .................................................... 20
System cleanliness ............................................................20
Compressor handling and storage .............................20
Compressor mounting ....................................................20
Compressor holding charge ..........................................20
Tube brazing procedure .................................................20
Brazing material .................................................................20
Compressor connection .................................................21
Vacuum evacuation and moisture removal .............21
Liquid line lter driers ......................................................22
Refrigerant charging ........................................................22
Insulation resistance and dielectric strength ..........22
Compressor replacement after motor burn out ....22
Ordering information and packaging ........ 23
Packaging ............................................................................23
Ordering code numbers .................................................23
AB141686422149en-US0401
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