11
C. HSI (HOT SURFACE IGNITION) MODULE (Gas Models Only)
The HSI (Hot Surface Ignition) 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 24 VAC 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 (Hot Surface
Ignition) module via the sensor probe lead connection
to the module. Once the resistance is changed and
sensed, the HSI (Hot Surface Ignition) module will
sustain the gas flow (provide 24 VAC 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, hot surface
ignitor, 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.
E. DRIVE MOTOR
The T.E.F.C. (Totally Enclosed, Fan-Cooled) drive motor is located in
the front left corner (viewing from front) behind the front panel of the
dryer. It sits on an adjustable base so the motor can be easily adjusted
to the left or right, up or down, forward or backward. The drive
motor is a 3 HP motor and operates on 208 to 460 volts, 50/60 Hz,
3-phase (3ΓΈ).