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

33
a. Air Requirements
b. Air Connection
Air connection to system --- 1/8-inch N.P.T.
c. No air regulator or filtration is provided with the dryer. External regulation/filtration of 80 PSI (5.51
bars) 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-75 steam damper shown in Diagram 1 in the illustration below, 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).
Diagram 1 shows the damper in the heating (open) mode, allowing heat into the basket (tumbler).
Diagram 2 shows the damper in the cool down (closed) mode, pulling ambient air directly into the basket
(tumbler) without passing through the coils.
NOTE: With the dryer off or with no air supply, the steam damper is in cool down mode as shown in
Diagram 2.
COMPRESSED AIR SUPPLY AIR PRESSURE
Normal 80 PSI 5.51 bars
Minimum Supply 70 PSI 4.82 bars
Maximum Supply 90 PSI 6.20 bars
Shaded areas are stated in metric equivalents