2.Troubleshooting/System Detailed Diagnosis

When the dryer calls for heat, 24 VAC from the step down transformer is applied to the "TH" and "GND" terminals of the DSI module. The DSI module L.E.D. (light emitting diode) indicator will light "red" (for up to approximately 1.5 seconds [prepurge]) then the L.E.D. indicator will light "green"; the gas valve will be energized, and the spark burst will be evident (on) for approximately 8 seconds at the tip of the electrode flame-probe assembly. Flame should now be established and confirmed. If a flame is not sensed and confirmed by the ignitor and flame-probe sensor after the approximate 8 second spark burst, the DSI module will go into the "LOCK-OUT" mode and the L.E.D. will light "red" continuously. THERE ARE NO

RETRIES.

NOTE: To reset the DSI module if it is in the "LOCK-OUT" mode, open and close the main door, then restart the dryer.

If a flame has been established/confirmed and then lost, the DSI module L.E.D. indicator will continue to light "green" and immediately a spark will be evident (on) for approximately 8 seconds. The flame should now be established/confirmed. If a flame is not sensed/confirmed by the ignitor/flame-probe sensor after the approximate 8 second spark burst, the DSI module will go into the "LOCK-OUT" mode and the L.E.D. will light "red" continuously. THERE ARE NO RETRIES.

NOTE: To reset the DSI module if it is in the "LOCK-OUT" mode, open and close the main door, then restart the dryer.

a. System Diagnosis

1) Gas Pressure

A gas pressure test should be taken at the gas valve pressure tap provided on every gas valve to assure that the water column (W.C.) pressure is correct and consistent.

There are two (2) types of devices commonly used to measure water column (W.C.) pressure. They are the spring and mechanical type gauge and the water column test gauge (manometers). The use of the spring and mechanical type gauges is NOT RECOMMENDED because they are not always accurate. The preferred type of gauge is the manometer because it is a simple device to use and is highly accurate. A manometer is simply a glass or transparent plastic tube with a scale graduated in inches. When it is filled with water and pressure is applied, the water in the tube rises, showing the exact water column (W.C.) pressure.

WARNING: Test ALL connections for leaks by brushing on a soapy water solution.

NEVER TEST FOR LEAKS WITH A

FLAME!

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American Dryer Corp AD-200 service manual Troubleshooting/System Detailed Diagnosis, Retries
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AD-200 specifications

The American Dryer Corp AD-200 is a renowned commercial dryer that stands out in the market for its efficiency, performance, and durability. Designed for high-demand environments such as laundromats, hotels, and gym facilities, the AD-200 delivers robust performance while maintaining user-friendly operation.

One of the standout features of the AD-200 is its capacity. With a generous drum size, this dryer can handle large loads, making it ideal for businesses with heavy laundry demands. This not only maximizes productivity but also allows users to process more laundry in less time, which is crucial in high-turnover environments.

The AD-200 employs advanced drying technologies that promote faster drying times while minimizing energy consumption. Its innovative airflow design ensures even heat distribution throughout the drum, allowing laundry to dry uniformly without hot or cold spots. This feature enhances drying efficiency and helps in preserving the quality of fabrics, reducing wear and tear over time.

Energy efficiency is a key characteristic of the AD-200. It is equipped with an EcoDry system that optimizes the drying process, significantly reducing operating costs. This technology monitors moisture levels in the drum and adjusts drying times accordingly. By preventing excess energy use, the EcoDry system not only helps in saving on utility bills but also aligns with environmentally responsible practices.

The AD-200 is built for reliability and longevity. Constructed with high-quality materials, it features a heavy-duty stainless steel drum that resists scratches, dents, and corrosion. Additionally, the unit’s design incorporates easy access for maintenance and service, which can drastically reduce downtime and operational disruptions.

In terms of user-friendliness, the AD-200 comes with a simple control interface that allows operators to select drying cycles with minimal effort. The intuitive controls and clear display make it accessible for all staff members. The dryer also includes adjustable drying times and temperatures, giving users flexibility to cater to different fabric care requirements.

Overall, the American Dryer Corp AD-200 is a steadfast solution for commercial laundry applications. Its combination of capacity, efficiency, and durability makes it a preferred choice among business owners looking to enhance their laundry operations while keeping costs manageable. With cutting-edge technology and user-centric design, the AD-200 stands as a reliable asset in the realm of commercial drying solutions.
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