Thermo King UT-1200, Manual

Page: 33 / 169

Unit Description
33
Refrigeration System Diagrams
The following pages show the refrigeration
system and examples of the refrigerant flow in the
various modes.
These diagrams show a nosemount unit. The
undermount unit is basically the same except the
condenser and evaporators are separate
assemblies connected by refrigeration lines.
1. Scroll Compressor 16. Expansion Valve
2. Compressor Temperature Sensor 17. Distributor
3. Compressor Sight Glass 18. Evaporator Coil
4. Liquid Injection Solenoid (LIS) 19. Drain Pan Heater
5. High Pressure Cutout Switch (HPCO) 20. Suction Access Port
6. Discharge Strainer 21. Accumulator
7. Discharge Pressure Transducer 22. Suction Pressure Regulator (SPR)
8. Discharge Service Port 23. Suction Service Valve
9. Condenser Inlet Solenoid (CIS) 24. Suction Pressure Transducer
10. Condenser Coil 25. Discharge Pressure Regulator (DPR)
11. High Pressure Relief Valve 26. Hot Gas Solenoid (HGS)
12. Receiver Tank Outlet Valve 27 Purge Check Valve
13. Receiver Tank Sight Glass 28. Purge Valve (PV)
14. Dehydrator (Filter-Drier) 29 Receiver Tank Pressure Check Valve
15. Heat Exchanger 30. Condenser Check Valve
Figure 6: Refrigeration System Components