C. HSI Module (Gas Models
Only)
The HSI system consists of a microprocessor- based control module, along with a hot surface ignitor probe and a flame probe assembly. The hot surface ignitor is a silicon carbide ignitor that upon application of 24VAC will glow bright orange for the inter-purge time period. Upon ignition, the resistance in the flame sensor electrode changes and the information is sent to the HSI module via the sensor probe lead connection to the module. Once the resistance is changed and sensed, the HSI module will sustain the gas flow (provide 24VAC power to the gas valve).
D. Gas Burner Assembly
Gas-heated dryers are equipped with a gas burner assembly consisting of three (3) burner tubes, gas valve, glo bar, flame sensor, sail switch, and hi-limit thermostat. The inlet piping enters through the rear of the dryer on the left-hand side (viewing from the front) and runs to the front of the dryer where the gas valve is located.
