3.Troubleshooting and System Detailed Diagnosis For Johnson Direct Spark Ignition Module P/N 128935

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 “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/flame-probe sensor after the approximate 8-second spark burst, the DSI module will wait 30-seconds and start ALL over again.

If a flame has been established and confirmed and then lost, the DSI module L.E.D. indicator will continue to LIGHT “GREEN,” wait 30-seconds and try again. The flame should now be established and confirmed. If a flame is not sensed and confirmed by the ignitor/flame-probe sensor after the initial try, the module will try two (2) more times, then if flame is still not established it will go into LOCKOUT mode (the L.E.D. [light emitting diode] will BLINK “GREEN” CONTINUOUSLY).

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 inner tube lowers, showing the exact water column (W.C.) pressure in inches.

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

WARNING: NEVER TEST FOR LEAKS

WITH A FLAME!!!

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American Dryer Corp AD-200 PHASE 7 service manual With a Flame, System Diagnosis Gas Pressure
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AD-200 PHASE 7 specifications

American Dryer Corp (ADC) has long been a leader in the laundry equipment industry, and its AD-200 PHASE 7 model is a testament to the company's commitment to innovation and efficiency. Designed for commercial applications, the AD-200 PHASE 7 is a high-performance dryer that sets a new standard for drying technology in laundromats, hotels, and other laundry facilities.

One of the standout features of the AD-200 PHASE 7 is its advanced drying system that utilizes a powerful, high-efficiency motor. This motor works in conjunction with a unique airflow design, ensuring that clothes dry quickly and evenly while minimizing energy consumption. The dryer is built to handle large loads, making it an ideal choice for busy commercial environments where efficiency is crucial.

The AD-200 PHASE 7 incorporates state-of-the-art technology to optimize the drying process. It features a microprocessor control system that allows operators to customize drying cycles based on the specific needs of different fabrics. This system not only enhances the user experience by providing precise control but also helps protect garments from over-drying and damage. Additionally, the dryer boasts multiple temperature settings, allowing users to choose the best drying conditions for each load.

Another key characteristic of the AD-200 PHASE 7 is its durable construction. Built with high-quality materials, including reinforced stainless steel, this dryer is designed to withstand the rigors of daily use in a commercial setting. Its robust design not only extends the lifespan of the equipment but also reduces the need for frequent maintenance, which can be a significant cost-saving benefit for businesses.

Energy efficiency is another aspect where the AD-200 PHASE 7 excels. It is equipped with an efficient heat exchange system that recycles hot air during the drying process, reducing energy consumption without compromising performance. This feature contributes to lower utility bills, making it a more sustainable option for businesses looking to improve their environmental footprint.

In conclusion, the American Dryer Corp AD-200 PHASE 7 is a powerful, efficient, and durable commercial dryer that meets the demands of high-volume laundry operations. With its advanced technological features, customizable controls, and energy-saving capabilities, the AD-200 PHASE 7 not only enhances operational efficiency but also provides excellent value for commercial laundry providers. Businesses looking to invest in reliable drying solutions will find the AD-200 PHASE 7 an outstanding choice.
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