Refrigeration (Cooling) Cycle - Trane R Series Installation Operation & Maintenance

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10
11
12
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16
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15
Figure 36 RTUA with RTCA Refrigeration System and Control Components
1. Discharge Service Valve
2. Oil Separator
3. 1/4" Angle Valve
4. Oil Cooler (if "V" is in 17th digit 12. Sight Glass
of Model #)
5. Oil Line Service Valve
6. Oil Temperature Sensor
7. Condenser
8. Saturated Condenser
Refrigerant Temperature Sensor 17. Leaving Water Connection
9. Solenoid Valve
RLC-SVX07A-EN
Operating Principles
RTCA
Condenser
7
17
20
Evaporator
18
9
10. Liquid Line Service Valve
(Backseat Port Upstream)
11. Filter/Dryer
13. Schrader Valve
14. Electronic Expansion Valve
15. 1/4" Angle Valve
16. Saturated Condenser
Refrigerant Temperature Sensor 25. Low Pressure Switch
18. Evaporator Leaving Water
Temperature Sensor

Refrigeration (Cooling) Cycle

RTWA Cycle Description
Figure 35 represents the refrigeration system and control components of an
RTWA. Vaporized refrigerant leaves the evaporator and is drawn into the
compressor. Here it is compressed and leaves the compressor as a mixture
of hot gas and oil (which was injected during the compression cycle).
The mixture enters the oil separator at the in/out cap. The separated oil flows
to the bottom of the separator, while the refrigerant gas flows out the top and
passes on to the tubes in the condenser. Water flows through the copper
tubes in the condenser, which removes the heat from the refrigerant and
condenses it.
The condensed refrigerant passes through the electronic expansion valve and
into the tubes of the evaporator. As the refrigerant vaporizes, it cools the
system water that surrounds the tubes in the evaporator.
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22
5
23
21
19
19. Temperature Responsive Valve
20. Entering Water Connection
21. Evaporator Entering Water
Temperature Sensor
22. Relief Valve
23. Suction Service Valve
24. Compressor Suction Refrigerant
Temperature Sensor
NOTE: - - - Field Installed Piping
2
1
6
3
4
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Factory Installed Piping
85