Operator`s manual

• Ignition module sends 24 VAC through the fan prover switch to the pilot coil and
gas is sent to the pilot.
• Ignition module sends 24 VAC to the main (low) coil of the gas valve and gas
(2.2” W.C. natural gas, 4.0” W.C. L.P) is sent to the infrared burner.
• The spark ignites the gas.
• At least .5 micro amps D.C. is received at the module in 4 seconds or the ignition
module locks out and the alarm buzzer sounds.
• If the burner setting is high, the K4 relay on the Relay and Motor Board closes. 24
VAC is sent from pin T11 on J2 (12-pin quick-connect) on the Relay and Motor Board
to the high coil of the gas valve and the gas pressure is increased (3.2” W.C. natural
and 10.0” W.C. LP) to the infrared burner.
• The K3 relay on the Relay and Motor Board closes after 5 second delay (allowing for
pilot ignition) sending 120 VAC to the convection blowers.
• The burner continues to heat 25 degrees above the set point, then it shuts down to begin
again at set point (NOTE: THIS IS THE SECONDARY TEMPERATURE
CONTROL).
• This continues and changes only as the set points of the program change until the cook
program ends.
5. When the cooking cycle has timed out the computer will go into the hold mode and display
“HOLD”.
• The K3 relay opens and the burner circuit is de-energized.
• The K1 relay opens and the convection fan circuit is de-energized.
• The K2 relay opens and the vent closes.
• The signal is sent to the D.C. drive motor to drive at 1 RPM.
• When the temperature drops below the hold set point the burner and convection fan
circuits will start. NOTE: DURING THE HOLD CYCLE THE TEMPERATURE
CONTROL IS MAINTANED BY THE BURNER AND CONVECTION FAN
CIRCUITS.
6. To turn the unit off depress the on/off switch.
• 120 VAC is removed from red power indicator (switch).
• 120 VAC is removed from light switch.
• 120 VAC is removed from combustion blower fan.
• 120 VAC removed from the Relay Interface Board (RIB).
• 120 VAC is removed from the primary of the ignition transformer.
• 120 VAC is removed from the primary of the computer transformer.
• 24 VAC removed from the secondary of the computer transformer to the computer
the display is blank.
• 120 VAC is sent to terminals 3 and 2 on the 30-minute timer.
• For 30 minutes the cooling fans will be energized.