American Dryer Corp. AD-400 - Manual (Page 34)

DECOMPRESSED AIR SYSTEM
The compressed air system of the AD-400 diyer coivsists of a number of pneumatic pistons located
throughout the dryer. 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
Opjerate Heat Reclaimer
Operate Steam Coil and Cool Down Dampers (Steam Heated Dryer Only)
1. Filter/Lubricator/Regulator/Gauge Assembly
The compressed air supply to the dryer is connected into the 3/8-inch FPT fitting of the
filter/lubricator/regulator/gauge (F/L/R/G) assembly which is located at the bottom rear of the lower
burner section.
The F/L/R/G assembly performs three essential functions. 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.
The lubricator injects a mist of oil into the compressed air stream so that the pistons and solenoid valves
will function smoothly.
The oiling rate can be adjusted by turning the oil adjustment screw on top of the lubricator.
Oil is added to the bowl through the large fill port located on top of the lubricator. Oil can be added
without turning off the air pressure to the dryer.
The lubricator bowl should be refilled on a monthly basis with any petroleum-based, non-detergent
lightweight oil (SAE10/150 SSU) which will readily break up into a mist. Do not use synthetic oil or oils
containing additives or solvents.
The regulator will maintain a nearly constant outlet air pressure of 80 psi so that the dryer's air pistons
will function normally despite upstream air pressure variation.
[ NOTE: For complete operation and maintenance information on the F/L/R/G assembly, refer
to the manufacturers data sheets accompanying this manual.
32