a)Connect the water column (W.C.) test gauge (manometer) to the gas valve pressure tap (1/8” N.P.T.). Refer to the illustration on the previous page.

b)Start the dryer...with the burner on, the correct water column pressure reading in inches should be :

Natural Gas ------------------ 3.5 inches (8.7 mb) water column. Liquid Propane (L.P.) Gas - 10.5 inches (26.1 mb) water column.

When a gas dryer is first started (during initial time of installation or start-up), it has a tendency not to ignite on the first ignition attempt. This is due to the fact that the gas supply piping is filled with air, so it may take a few minutes for the air to be purged from the supply lines. During this purge period there may be insufficient gas pressure for ignition, which might cause the Direct Spark Ignition (DSI) module to go into the “LOCKOUT” mode (the light emitting diode [L.E.D.] will LIGHT “RED” CONTINUOUSLY).

NOTE: During the purge period, check to be sure that ALL shutoff valves are open.

NOTE: To reset the DSI module if it is in the “LOCKOUT” mode, “Burner Control Fault” will display. To clear this fault press the “CLEAR/STOP” key.

c)If gas pressure is low, unscrew slotted regulator cover on top of the gas valve and turn regulator (pressure) adjustment screw (located underneath the cover) clockwise (CW) to increase the pressure.

2)Ignitor/Flame-Probe Assembly

The Ignitor/Flame-Probe Assembly consists of a ceramic insulated ignitor electrode, a ground rod, and a ceramic insulated flame-probe electrode. The GAP between the ignitor electrode and the ground rod is set, and must be maintained at 1/8” +/- 1/32” (3.175 mm +/- 0.79248 mm). When the DSI module provides the high synchronous spark (14,000 volts) through the high voltage (HV) lead, a spark is produced over the GAP. When this spark is produced, the gas valve is opened. Upon ignition, the flame-probe electrode (of the Ignitor/Flame-Probe Assembly) has high voltage provided to it that supplies a small current to ground through the flame. Once the current is sensed, it initializes the DSI module to sustain the gas flow (from the gas valve).

IMPORTANT: THE GAP SETTING ON THE

IGNITOR/FLAME-PROBE

ASSEMBLY IS CRITICAL.

a) DSI Ignitor/Flame-Probe Assembly Adjustments

(1) The GAP on the Ignitor/Flame-Probe

Assembly must be set, and held at 1/8” +/- 1/32” (3.175 mm +/- 0.79248 mm). If this GAP is not maintained (if the GAP is either too large or too small), the DSI module will indicate a system malfunction and go into the “LOCKOUT” mode (the L.E.D. will LIGHT “RED” CONTINUOUSLY).

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ADC AD-200 service manual GAP on the Ignitor/Flame-Probe
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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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