American Dryer Corp. AD-400 User Manual
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On a gas-heated dryer, the heat reclaimer damper is dosed until ignition of flame has been established.
Then, the damper piston is actuated, opening the damper and redrculating half of the exhaust air back
over the gas burner and into the tumbler. The damper remains open for the rest of the drying cyde. On
cool down, the damper closes, exhausting all of the 9,000 cfm which insures a fast cool down of the load.
1. Lint Chamber Pressure Switch
This switch is located in the left side of the dryer base. It insures that adequate air is drculating through
the dryer. If there is an airflow problem possibly caused by poor fresh air supply, an overly long or
partially blocked exhaust duct, or by a clogged up lint screen, this switch will shut off the heat and
display "AIR FAULT" on the computer display.
2. Main Blower Wheel Air Jet
Lint can accumulate on the main blower wheel which over a period of time can cause the wheel to
become unbalanced, an unbalanced motor will vibrate and damage motor bearings. An air jet has been
provided which will shoot an 80 psi stream of air onto the blower wheel, cleaning off any lint
accumulation. The air jet is activated by a solenoid valve which is opened for a p»eriod of thirty (30)
seconds at the end of each drying cycle.
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