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Heat Mode Air Flow
During a call for heat, solenoid S10 turns on and air first
enters the dryer on the bottom right side of the dryer. The air
then passes through the open inlet air damper, then passes
through the six (6) steam coils to heat the air. Next, the air
enters the tumbler (basket) heating the load inside. The air
then goes through the lint screen. Once the air is filtered by
the lint screen it is forced out of the exhaust by the blower. A
percentage of the air being exhausted gets reheated by the
heat reclaimer to be used again. (Refer to the Drying Cycle
illustration below).
Temperature Set Point/Cool Down Mode
During a cool down mode, solenoid S10 turns off and solenoid
S9 turns on. In this mode, the air enters through the cool
down damper on top of the dryer and enters the tumbler
(basket). The air then passes through the lint basket and
gets pushed out of the exhaust by the blower wheel. (Refer
to the Cool Down Cycle illustration below).
Natural Gas and Liquid Propane (L.P.)
Gas Conversion Instructions ________
Impor tant
Conversion must be performed by competent
technicians in accordance with local and state
codes.
1. Loosen the screw on the high fire valve cap that doesnt
have the paint drop.
2. Turn the cap to the + to increase the pressure or to the
- to decrease the pressure.
3. Take the pressure reading at the outlet of the valve.
4. Tighten the screw to lock the cap once the pressure is
set to 1.25 inches of water column (W.C.) for L.P. gas.
Steam Heat System _________________
The steam dryer uses six (6) steam coils to produce a heat
input of 60 Bhp (boiler horsepower). The dryer utilizes three
(3) separate dampers to direct air in the drying process or
cool down process of a cycle.
The first damper is the cool down damper located on the top
of the dryer, and is used to bring fresh, room temperature air
into the tumbler (basket). When the dryer is in the cool down
mode or has reached its set point temperature, the damper
will be in the open position further reducing increases in
tumbler (basket) temperature. When there is a call for heat,
the damper closes, thereby requiring all of the air entering
the tumbler (basket) to go through the steam coils.
An inlet air damper is located in the middle of the right hand
section of the dryer. During a call for heat, this damper opens,
which allows ambient air into the dryer, which then goes
through the steam coils, heating the air. During cool down,
or if the dryer has reached its set point temperature, the
damper closes eliminating air from going through the steam
coils.
The heat reclaimer is used to divert a portion of the exhausted
air and run it through the steam coil, reheating the air.
Depending on the stroke at which the heat reclaimer has
been set, the amount of reclaimed air will vary. The heat
reclaimer is only opened during a call for heat. Once the
dryers' set point temperature is reached or during a cool down
mode the heat reclaimer will be closed.
Steam Coil pH Level
The normal pH level for copper type steam coils must be
maintained between a value of 8.5 to 9.5. For steel type
steam coils the pH level must be maintained between a value
of 9.5 to 10.5. These limits are set to limit the acid attack of
the steam coils.
Impor tant
Coil failure due to improper pH level will void the
warranty.
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