Carrier 17 Start Up & Operation Manual page 11

LEGEND *The FA compressor has a water-cooled oil cooler. Oil temperature is
manually controlled.
TXV — Thermostatic Expansion Valve
Oil Supply Flow
Oil Return Flow
Pressure Control Lines
Refrigerant
Capillary Tubing (Filled System)
Fig. 5 — Hermetic Compressor Lubrication System (EX Compressor Shown)