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C. COMPRESSED AIR SYSTEM
The compressed air system of the dryer consists of a number of pneumatic pistons located throughout the dryer,
an Filter/Regulator assembly, and pneumatic control panel.
1. Air Pistons:
The pistons are actuated by solenoid and flow control valves that are under computer control. The pneumatic
pistons are used to:
• Tilt the dryer for loading and unloading.
• Open and close load and unload doors.
• Operate heat reclaimer.
• Operate the cool down damper and the intake air damper.
2. Filter/Regulator Assembly
The compressed air supply to the dryer is connected into the 3/8-inch F.P.T. fitting located on the rear corner
of the lower heat console. This is connected to the (Filter Regulator) assembly which is located at the
bottom rear of the lower heat console section.
The Filter/Regulator Assembly performs three (3) functions;
a. The filter removes most solids and liquid particles from the compressed air stream and traps them in its
bowl where this waste can be readily removed through the drain valve at the bottom of the bowl.
The filter bowl should be cleaned monthly.
b. The regulator will maintain a nearly constant outlet air
pressure of 80 PSI (551.6 kPa) so that the dryer’s air
pistons will function normally despite upstream air
pressure variation.
NOTE: For complete operation and maintenance
information on the Filter/Regulator
assembly, refer to the manufacturer data
sheets accompanying this manual.
Dryers manufactured as of February 26, 1997 have their pneumatic components pre-lubricated.