American Dryer AD-202 Installation Manual page 60

WARNING: ELECTRICAL SHOCK HAZARD – Electrical shock hazard can result in
serious injury. If the water dispensing system is activated do not attempt to
operate the dryer. If the water dispensing system is activated have the dryer
inspected by a qualified agency before operating the dryer.
FIRE SUPPRESSION SYSTEM (F.S.S.) THEORY OF OPERATION
While the dryer is in an idle state or 20-seconds after the heat turns off, the Phase 7 control monitors the F.S.S.
probe located in the top of the tumbler chamber and records the minimum temperature. If the minimum recorded
F.S.S. probe temperature is no less than 120° F (48° C) and the control detects a 50° rise in temperature, this will
be the trip point and the F.S.S. routine will activate.
While a drying cycle is in process and the heat has turned on at least once, the Phase 7 control monitors the
exhaust temperature transducer. If the drying cycle temperature set point is set greater than 160° F (71° C) and
the control detects an exhaust temperature rise 25° F greater than set point, this will be the trip point and the
F.S.S. routine will activate. If set point is below 160° F (71° C) the trip point will be 185° F (85° C).
Once the F.S.S. routine is activated, water will be injected into the tumbler chamber. Anytime water is being
injected into the tumbler; the tumbler drive will turn the load for 1-second every 15-seconds. This process will
continue for a minimum of 2 minutes. After 2 minutes has elapsed, the control will check if the temperature
remained above trip point, if so water will remain on. The control will continue to check if temperature is above
trip point every 30-seconds. If the water has been on for a constant 10 minutes, the water will be turned off
regardless of the temperature. If the temperature has dropped below trip point, the control will turn off the water
prior to 10 minutes.
SYSTEM RESET
After the microprocessor determines that the situation is under control and shuts the water being injected into the
tumbler off, the microprocessor display will read "FIRE SUPPRESSION SYSTEM WAS ACTIVATED," and
the horn/tone will sound until reset manually.
To reset the microprocessor once the control displays "FIRE SUPPRESSION SYSTEM WAS ACTIVATED,"
press the red key on the keypad.
NON-COIN F.S.S. SYSTEM CHECK PROCEDURE
The operation of the water solenoid valve can be tested to ensure that the water supply system and valve are
functional. Before attempting system check, be sure that ALL water supply shutoff valves to the dryer are in
the OPEN position, and the dryer must be in the "READY" mode where no cycle is loaded or in progress.
The procedure is as follows:
1. Press and hold the RED STOP key (while in "READY" mode and no cycle in progress).
2. Press and hold the "A" key.
3. Water valve will open and water will be dispensed into tumbler area as long as both keys are held.
IMPORTANT: This is a test function only and the keys should be held and system activated for only
a second or so, otherwise water will accumulate in various places in the dryer.
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