2.For Heat Control Module Ignition Circuit

a. For Models With Johnson Controls Direct Spark Ignition (DSI) Module (G760)

Theory Of Operation:

Start the drying cycle. When the gas burner ignites within the chosen trial for ignition time (6-seconds), the flame sensor detects gas burner flame and signals the DSI module to keep the gas valve open...as long as there is a call for heat. The DSI module will “LOCKOUT” if the gas burner flame is not sensed at the end of the trial for ignition period. The trial for ignition period will be repeated for a total of three (3) retries/trials (the initial try and two [2] more retries/trials). If the flame is not sensed at the end of the third retry/trial (inter-purge period of 30-seconds) the DSI module will “LOCKOUT” (L.E.D. flashes).

A steady L.E.D. indicator indicates normal operation.

No L.E.D. indicator indicates a power or an internal failure has occurred.

b.For Models With Hot Surface Ignition (HSI) Module

1)Start the drying cycle.

2)The HSI will turn on, and after approximately 4-

seconds the ignitor will shut off and the gas valve will be energized. Ignition (flame) should now be established.

3) With the burner flame on, remove the flame sensor wire from the S2 terminal of the HSI module. The burner flame must shut off immediately.

4) Stop the drying cycle, with the flame sensor wire still removed, restart the drying cycle.

5)The HSI will turn on, and after a few seconds later the gas valve will be energized and the HSI will shut off. Ignition (flame) should be evident for approximately 7-seconds and then shut off.

6)The HSI module will attempt to light burner only “once.” If flame is not reestablished the HSI module will lockout and the “red” indicator light will flash continuously.

7)Functional check of the HSI module is complete.

a)Replace the flame sensor wire from the S2 terminal to the HSI module.

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American Dryer Corp D-40 installation manual
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D-40 specifications

American Dryer Corp has long been recognized as a leader in the manufacturing of high-efficiency commercial dryers, and the D-40 model is a prime example of their commitment to delivering quality, performance, and technological advancements. The D-40 is designed to meet the rigorous demands of laundromats, hotels, and other commercial laundry facilities, offering a perfect balance of power and efficiency.

One of the main features of the D-40 is its robust construction. Built with high-quality materials, this dryer ensures durability and longevity even in high-volume operations. The D-40 is equipped with a large capacity tumbler that can accommodate significant loads, making it an ideal choice for businesses that require efficient drying solutions.

The dryer utilizes a state-of-the-art microprocessor control system, allowing users to program multiple drying cycles tailored to specific fabric types or customer preferences. This technology enables precise drying times and temperatures, which helps to prevent damage to garments while maximizing efficiency. The control panel is user-friendly, featuring clear displays and intuitive navigation, ensuring that operators can quickly set up and adjust cycles as needed.

In terms of energy efficiency, the D-40 is engineered with advanced drying technologies that reduce utility costs. Its high-performance gas burners and optimized airflow design allow for rapid heat distribution, which significantly shortens drying times. The dryer also features a reliable heat exchanger system that ensures consistent heat output while minimizing energy consumption.

Another noteworthy characteristic of the D-40 is its sound-dampening design. The dryer is equipped with noise-reduction technology, allowing it to operate quietly, which is particularly beneficial in environments where noise may disrupt customers or staff.

Safety features are also of paramount importance in the D-40’s design. It includes a protective door interlock system that ensures the dryer cannot operate when the door is open, reducing the risk of accidents. Moreover, the D-40 has been designed with easy access for maintenance, making it simpler for technicians to perform routine checks and repairs.

In conclusion, the American Dryer Corp D-40 stands out in the competitive landscape of commercial dryers by combining high-capacity performance with energy efficiency, advanced technology, and a commitment to safety and durability. Its innovative features make it an ideal choice for businesses looking to optimize their laundry operations.
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