American Dryer Corp ML-55II installation manual Electrical Requirements, S. Theory Of Operation

Typical Water Supply

Optional Manual Bypass

Provisions are made in the dryer’s F.S.S. for the installation of an optional manual bypass. Depending on the model dryer, the connections for the manual bypass are made at the “T” or “four way” fitting located in the outlet supply side of the water solenoid valve. The use and connections of this manual bypass are at the option or discretion of the owner.

The water connection for the manual bypass is made to the “T” or “four way” fitting which has a 3/8” F.P.T. and a coupling must be used to provide the minimum 1/2” supply (feed) line.

If the rear area of the dryer, or the water supply is located in an area where it will be exposed to cold/freezing temperatures, provisions must be made to protect these water lines from freezing.

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.

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 control 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 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, the control 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 control will check if the temperature remained above trip point; if so, the water will remain on. The control 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 control will display “F.S.S. WAS ACTIVATED”. If the temperature has dropped below trip point, the control will turn off the water prior to 10 minutes.

22 American Dryer Corp. 113345-9