American Dryer Corp. ML-75V - Manual (Page 37)

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4. Steam Damper Air System Connections
The MLS-75V is manufactured with a pneumatic (piston) damper system, which requires an external
supply of compressed air. The air connection is made to the steam damper solenoid valve, which is located
at the rear inner top area of the dryer just in front of the electric service relay box.
a. Air Requirements
b. Air Connection
Air connection to system --- 1/8” N.P.T.
c. No air regulator or filtration is provided with the dryer. External regulation/filtration of 80 PSI (5.51 bar)
must be provided. It is suggested that a filter/regulator/gauge (F/R/G) arrangement be added to the
compressed air line just before the dryer connection. This is necessary to insure that correct and clean
air pressure is achieved.
5. Steam Damper System Operation
The MLS-75V steam damper shown in Diagram 1 in the illustration on the next page, allows the coil to
stay constantly charged eliminating repeated expansion and contraction. When the damper is opened, the
air immediately passes through the already hot coil, providing instant heat to start the drying process. When
the damper is closed, ambient air is drawn directly into the basket (tumbler), allowing a rapid cool down
(Diagram 2).
COMPRESSED AIR SUPPLY AIR PRESSURE
Normal 80 PSI 5.51 bar
Minimum Supply 70 PSI 4.82 bar
Maximum Supply 90 PSI 6.20 bar
Shaded areas are stated in metric equivalents