e.The Manual Reset Basket (Tumbler) Hi-Limit Switch is a thermostat type switch located above the Lint Basket. Its function is to discontinue heat (flame) in the event of an over temperature situation (above 225º F [107º C]).

f.The gas valve used in the ADG-200 is of the redundant type which means that the gas valve is actually two (2) gas valves in one (1); one (1) in series with the other. This is a safety feature, which provides protection against gas flow in the event that one (1) of the valves does not seat properly. The valve also regulates the incoming gas pressure.

NOTE: THE DSI GAS VALVES ARE NOT FIELD REPAIRABLE.

MAN3484

225º F (107º C) Thermostat

Redundant Gas Valve

g.Normal Operation of the Direct Spark Ignition (DSI) System (refer to the illustration on page 15).

1)The DSI System consists of a microprocessor-based control module, along with an Ignitor/Flame- Probe Assembly. This control utilizes a high voltage (HV) synchronous spark ignitor and a rectified flame sensor probe signal to locally control ALL basic functions in the gas burner.

On a call for heat by the dryers’ controls, 24 VAC is applied to the DSI module at which time the modules’ light emitting diode (L.E.D.) indicator will light “red” indicating that power has been established to the module. Almost immediately (up to approximately 1.5-seconds [prepurge]) the indicator will light “green,” the gas valve opens and the spark burst will be evident (on) for approximately 8-seconds. The burner flame should now be established/confirmed.

If at this time the flame has not been established and confirmed, the DSI module will “LOCKOUT” and the modules’ L.E.D. indicator will light “red” and stay on continuously. “Burner Ignition Control Fault” will display. To clear this fault press the “CLEAR/STOP” key.

Once the burner flame is established and confirmed, the DSI module indicator will light “green,” and the burner system will continue through a normal heating cycle, where the DSI system will cycle on and off as required by the dryer’s controls.

During the normal heating cycle, should a “FLAMEOUT” occur (i.e., severe air turbulence forces the flame away from the Ignitor/Flame-Probe Assembly), the DSI module will shut the gas valve off and immediately try to reestablish the burner flame. The DSI module will attempt to light the burner ONLY ONCE. If flame is not established, the DSI module will “LOCKOUT” and “Burner Ignition Control Fault” will display. To clear this fault press the “CLEAR/STOP” key.

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ADC AD-200 service manual 225º F 107º C Thermostat Redundant Gas Valve
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AD-200 specifications

The ADC AD-200 is a high-performance analog-to-digital converter designed to meet the needs of a wide range of applications including industrial automation, instrumentation, medical devices, and consumer electronics. This converter is renowned for its combination of speed, precision, and reliability.

One of the standout features of the ADC AD-200 is its exceptional resolution. Offering up to 24 bits of resolution, it provides an outstanding level of detail and accuracy in signal conversion. This high resolution makes it ideal for applications where precision is paramount, such as in audio processing and sensitive measurements in scientific research.

The AD-200 operates at a maximum sampling rate of 1 Msps (mega-samples per second), allowing it to effectively capture fast-changing signals. This speed ensures that the converter can handle dynamic input signals without missing critical data points. Additionally, the device employs a pipelined architecture, which helps to maintain high throughput while keeping latency low—an essential characteristic for real-time applications.

Another critical aspect of the AD-200 is its low input noise and distortion levels. With a total harmonic distortion (THD) of less than 0.01%, the converter maintains signal integrity even when processing high-frequency signals. This feature is crucial in audio and instrumentation applications where signal clarity and fidelity are necessary.

The ADC AD-200 is equipped with advanced digital signal processing (DSP) capabilities, allowing users to perform filtering, averaging, and other signal conditioning tasks on the incoming data stream. This built-in processing capability means users can reduce the load on external processors, streamlining system designs and improving overall efficiency.

The device supports various input voltage ranges, which makes it versatile for multiple applications. It is compatible with single-ended and differential input configurations, providing flexibility for different circuit designs and requirements.

Connectivity features include both serial and parallel interfaces, offering easy integration into various systems. The ADC also comes with a robust software development kit (SDK) that provides necessary drivers and support to facilitate quicker implementation and system optimization.

In summary, the ADC AD-200 is a versatile, high-performance analog-to-digital converter marked by its high resolution, fast sampling rate, low noise levels, integrated DSP capabilities, and flexible connectivity options. These features make it a preferred choice for engineers and developers aiming for excellence in signal processing tasks across diverse industries.
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