S.A.F.E. System 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 S.A.F.E. system 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 S.A.F.E. system routine will activate. If set point is below 160° F (71° C), the trip point will be 185° F (85° C).

Once the S.A.F.E. system routine is activated, the control will display “S.A.F.E. SYSTEM 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 “S.A.F.E. SYSTEM WAS ACTIVATED.” 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 basket (tumbler) off, the microprocessor display will read “S.A.F.E. SYSTEM WAS ACTIVATED,” and the horn/tone will sound until reset manually.

To reset the microprocessor once the control displays “S.A.F.E. SYSTEM WAS ACTIVATED,” press the red “STOP/CLEAR” key on the keyboard (touch pad).

S.A.F.E. SYSTEM WATER VALVE CHECK

The operation of the water solenoid valve can be tested to ensure that the water supply system and valve are functional. Before attempting a system check, be sure that ALL water supply shutoff valves to the dryer are in the OPEN position; the dryer must be in the “READY” mode with no cycle loaded or in progress.

1.Press and hold the red “STOP/CLEAR” key (while in “READY” mode and no cycle is in progress).

2.Press and hold the “A” key.

3.Water valve will open and water will be dispensed into basket (tumbler) area as long as both keys are held.

The Phase 7 non-coin microprocessor controller (computer) will prompt the user to perform a S.A.F.E. system valve check at every 4000 hours to ensure proper functionality. At the 4000 hour mark, the control will wait for end of the cycle and then will prompt the user to “PLEASE EMPTY TUMBLER, THEN PRESS THE ‘STOP/CLEAR’ AND ‘A’ KEYS TO TEST THE WATER VALVE.” When the ‘STOP/CLEAR’ and ‘A’ keys are pressed, the control will activate the S.A.F.E. system water valve for 2-seconds, at which point the control will prompt the user with the following message: “IF WATER DID NOT TURN ON, CALL FOR SERVICE. THANK YOU.”

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American Dryer Corp MDG50MNV, MDG50PNH installation manual F.E. System Theory of Operation
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MDG50MNV, MDG50PNH specifications

American Dryer Corp has established itself as a leader in the commercial laundry equipment industry, and their MDG50PNH and MDG50MNV models exemplify their commitment to quality, efficiency, and innovation. Designed for high-performance operation, these dryers cater to the needs of laundromats, hotels, health facilities, and other commercial establishments requiring reliable and effective drying solutions.

One of the standout features of the MDG50PNH and MDG50MNV is their robust construction. Built with heavy-duty steel, these dryers are engineered to withstand the rigors of a busy laundry environment. The exterior is finished with a corrosion-resistant powder coating, ensuring long-lasting durability and minimal maintenance. The large, stainless steel doors provide ease of access, making loading and unloading laundry effortless.

In terms of performance, these dryers showcase an impressive drying capacity, accommodating large loads efficiently. This is made possible by their powerful heating elements, which provide rapid and consistent heat distribution. The MDG50 series also includes advanced airflow technology, ensuring that hot air circulates effectively throughout the drum. This not only enhances drying efficiency but also minimizes energy consumption, making these models eco-friendly options for commercial laundry operations.

The MDG50PNH and MDG50MNV models are equipped with user-friendly controls that simplify operation. With intuitive digital displays, operators can easily select drying cycles, adjust temperature settings, and monitor remaining drying time. The models feature several programmable settings, allowing users to customize cycles based on specific fabric types or drying requirements. Additionally, these dryers come with a lint filter system designed to trap lint effectively, enhancing performance and safety.

Another notable characteristic is their quiet operation. Designed with noise-reduction technologies, these dryers minimize sound levels, making them suitable for establishments where noise can be a concern. Furthermore, both models have safety features such as door switches and over-temperature protection, ensuring safe operation for users.

In conclusion, the American Dryer Corp MDG50PNH and MDG50MNV models are excellent choices for commercial laundry applications. Their combination of durability, efficiency, and user-friendly features makes them stand out in the marketplace. Whether it's for a bustling laundromat or a high-demand hotel, these dryers deliver the performance and reliability necessary to meet the demands of everyday laundry operations. With their innovative technology and thoughtful design, American Dryer Corp continues to set a high standard in the industry.
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