American Dryer Corp. ML-170 - Manual (Page 26)

26 American Dryer Corp. 113360 - 8
5. Steam Damper System Operation
The steam damper as shown in the illustration
on the right, 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 tumbler, allowing a rapid cool
down.
Diagram 1 – shows the damper in the heating
(open) mode, allowing heat into the tumbler.
Diagram 2 – shows the damper in the cool down (closed) mode, pulling ambient air directly into the 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 above.
6. Steam Damper Air Piston (Flow Control) Operation Adjustment
Although the steam damper operation was tested and adjusted prior to shipping at 80 psi (5.51 bar), steam damper
operation must be checked before the dryer is put into operation. Refer to the illustration above for correct
steam damper operation. If steam damper adjustment is necessary, locate the flow control valve and make the
necessary adjustments as noted below.