1. Air Pressure Gauge
2. Idle Warm-Up Control Selector Valve
3. Low Pressure Regulator Valve
4. High Pressure Regulator/Blowdown
Valve Manifold
5. Instrument Panel
6. High/Low Pressure Selector Switch
7. Air Filter
8. Orifice
9. Silencer
10. Inlet Valve
11. Strainer
12. Minimum Pressure/Check Valve
13. Pressure Relief Valve
14. Compressor Unit
15. Fluid Fill/Fluid Level Sight Glass
16. Optional Discharge Air Filters
17. Optional Moisture Separator
18. Optional Aftercooler
19. Aftercooled Machines ONLY
20. Fluid Filter
21. Thermal Valve
22. Fluid Cooler
23. Air
24. Fluid/Air
25. Fluid
Figure 2-5: Control System with Piping and Instrumentation—300HH, 375H, 375HH and 425H Models