Trane AdaptiR RTHD Installation Operation & Maintenance page 7

Operating Principles Mechanical ........................................................................... 78
RTHD-SVX04K-EN
Table 23. Wire Selection Chart for Starter Panels .......................................................... 71
Figure 31. Electrical Installation ........................................................................................ 71
Module Connections for Interconnecting Wiring ..................................................72
Interconnecting Wiring (Field Wiring Required) ..................................................... 73
Chilled Water Pump Control ..................................................................................... 73
Chilled Water Flow Interlock ..................................................................................... 73
Condenser Water Pump Control .............................................................................. 73
Condenser Water Flow Interlock .............................................................................. 74
Chilled Water Reset (CWR) ....................................................................................... 74
Equations for calculating CWR ................................................................................. 74
Table 24. Chiller Events/Status Descriptions .................................................................. 75
Table 25. Programable Relays ......................................................................................... 76
Emergency Stop ........................................................................................................ 76
External Auto/Stop .................................................................................................... 76
Soft Loading ............................................................................................................... 76
External Base Loading - Optional ............................................................................. 76
Base Loading Control setpoint ................................................................................. 77
Summit Interface - Optional ..................................................................................... 77
General ......................................................................................................................78
Refrigeration (Cooling) Cycle ..................................................................................78
Cycle Description ....................................................................................................... 78
Figure 32. Pressure /Enthalpy Curve ................................................................................. 79
Figure 33. RTHD Refrigerant Flow Diagram ..................................................................... 80
Figure 34. RTHD Variable Volume Ratio Refrigerant Flow Diagram .............................. 80
Compressor Description ..........................................................................................81
Figure 35. Compressor Description .................................................................................. 81
Compressor Motor .................................................................................................... 82
Compressor Rotors ................................................................................................... 82
Frequency Change ..................................................................................................... 82
Slide Valve Movement .............................................................................................. 83
Oil Management System .........................................................................................83
Oil Separator .............................................................................................................. 83
Figure 36. RTHD Oil Flow Diagram ................................................................................... 84
Figure 37. RTHD Variable Volume Ratio Oil Flow Diagram ............................................ 85
Oil Flow Protection .................................................................................................... 85
Oil Filter ...................................................................................................................... 86
Compressor Bearing Oil Supply ............................................................................... 86
Compressor Rotor Oil Supply .................................................................................. 86
Lubricant Recovery .................................................................................................... 86
Oil Cooler ................................................................................................................... 87
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