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46 American Dryer Corp. 113226-6
WARNING: If the water in the supply line or water solenoid valve freezes, the F.S.S. will be
INOPERATIVE!!
The manual ball cock shutoff valve must be located outside of the dryer at a distance from the dryer where it
is easily accessible.
3. Electrical Requirements
No independent external power source or supply connection is necessary. The 24 volt power to operate the
F.S.S. is accomplished internally in the dryer (from the dryer controls).
WARNING: Electrical power must be provided to the dryer at ALL times. If the main electrical
power supply to the dryer is disconnected, the F.S.S. is INOPERATIVE!!
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 microprocessor controller
(computer) monitors the thermistor probe, located in the top of the basket (tumbler) chamber, and records the
minimum temperature. If the minimum recorded thermistor probe temperature is greater than 120° F (48° C)
and the microprocessor controller (computer) 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 microprocessor controller
(computer) monitors the exhaust temperature transducer. If the drying cycle temperature set point is set greater
than 160° F (71° C) and the microprocessor controller (computer) 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, the microprocessor controller (computer) will display “F.S.S. ACTIVATED”
and water will be injected into the basket (tumbler) chamber. Any time water is being injected into the basket
(tumbler), the basket (tumbler) drive will turn the load for 1-second every 15-seconds. This process will continue
for a minimum of 2 minutes. After the 2 minutes have elapsed, the microprocessor controller (computer) will
check if the temperature remained above trip point; if so, the water will remain on. The microprocessor controller
(computer) will continue to check if the 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, and the microprocessor
controller (computer) will display “F.S.S. WAS ACTIVATED.” If the temperature has dropped below trip point,
the microprocessor controller (computer) will turn off the water prior to 10 minutes.
SYSTEM RESET
After the microprocessor controller (computer) determines that the situation is under control and shuts the water
being injected into the basket (tumbler) off, the microprocessor controller (computer) display will read “F.S.S.
WAS ACTIVATED,” and the horn/tone will sound until reset manually.
NON-COIN – To reset the microprocessor controller (computer) once the microprocessor controller (computer)
displays “F.S.S. WAS ACTIVATED,” press the red “STOP/CLEAR” key on the keyboard (touch pad).
COIN – To reset the microprocessor controller (computer) once the microprocessor controller (computer)
displays “F.S.S. WAS ACTIVATED,” press and hold the red “PAUSE” key for 3-seconds on the keyboard
(touch pad).