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Steam Damper System Operation
The steam damper, as shown 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 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 in Diagram 2.
Steam Damper Air Piston (Flow Control)
Operation Adjustment
Damper operation was tested and adjusted prior to shipping at 80 psi
(5.51 bar). If damper air adjustment is necessary, locate the flow control
valve and make the necessary adjustments as noted below.
Preparation
for Operation/Start-Up _________
The following items should be checked before
attempting to operate the dryer:
• Read all “Caution”, “Warning”, and “Direction”
labels attached to the dryer.
• Check incoming supply voltage to be sure that
it is the same as indicated on the dryer data
label.
• Gas Models – check to ensure that the dryer is
connected to the type of heat/gas indicated on
the dryer data label.
• Gas and Electric Models – the sail switch
damper assembly was installed and adjusted
at the factory prior to shipping. However, each
sail switch adjustment must be checked to
ensure that this important safety control is
functioning.
• Check bolts, nuts, screws, terminals, and
fittings for tightness and security.
• Gas Models – be sure that all gas shutoff
valves are in the open position.
• Check all back guard panels and service box
covers have been replaced.
• Check the lint drawer to ensure that it is closed
and secured in place.
• Rotate the tumbler (drum) by hand to be sure it
moves freely.
• Steam Models – check to ensure that a clean,
dry, regulated air supply (80 psi [5.51 bar]) is
on the dryer (with air-operated damper system
only).
• Steam Models – check to ensure all steam
shutoff valves are open.
• Steam Models – check steam damper
operation.
• Check tumbler bearing setscrews to ensure
that they are all tight.
• Check that the vent is connected to the dryer
and is exhausted to the outdoors.