Oil System Operation (Cgam) - Trane CGAM Installation & Operation Manual

CGAM Operating Principles
passages.The refrigerant vapor leaves the evaporator as
superheated gas. State Point 1.
Refrigerant vapor generated in the evaporator flows to the
compressor suction manifold where it enters and flows
across the compressor motor windings to provide cooling.
The vapor is then compressed in the compressor scroll
chambers and discharged. Oil from the compressor sump
lubricates the bearings and seals the small clearances
between the compressor scrolls. Refrigerant vapor is
discharged to the air-cooled condenser at State Point 2.
After the refrigerant vapor condenses into liquid (State
Points 3 and 4) it is returned to the evaporator (State Point
5) where the refrigerant again flashes into vapor and the
refrigeration cycle repeats.

Oil System Operation (CGAM)

Overview
The oil is efficiently separated inside the scroll compressor
and will remain in the scroll compressor during all run
Figure 86. CGAM scroll compressor sizes
Figure 87. Compressor Internal Components, 15-30T
CG-SVX17E-EN
Figure 85. Pressure/Enthalpy Curve
Liquid
3
4
5
Enthalpy
cycles. Between 1-2% of the oil circulates around with the
refrigerant.
2
1
Gas
99