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Impinger II – Advantage Digital Express Service Manual - Domestic
2
SEQUENCE OF OPERATION
IMPINGER II ADVANTAGE, GAS
(OVENS WITH PUSH BUTTON CONTROLS)
MODEL 1116-080-A NAT. GAS 120VAC 60 HZ. 1 PHASE
MODEL 1116-080-A1 NAT. GAS 120VAC 60 HZ. 1 PHASE
MODEL 1117-080-A LP GAS 120VAC 60 HZ. 1 PHASE
MODEL 1117-080-A1 LP GAS 120VAC 60 HZ. 1 PHASE
POWER SUPPLY Electrical power is supplied to the oven by a three-conductor cordset. Voltage
from the black conductor to the white conductor is 120VAC.
Black conductor is hot
White conductor is neutral.
Green conductor is ground.
CONTROL BOX AUTO
COOL DOWN
When the temperature in the control box reaches 120°F ± 3° (48.9°C ± 1.7°), the
cooling fan thermostat will switch power to the control box cooling fans. The
thermostat will interrupt power to the cooling fans when the control box
temperature falls to 100°F ± 3° (37.8°C ± 1.7°).
MAIN FAN CIRCUIT Power is permanently supplied, through a 10 amp fuse, to the normally open
main power switch. Power is also supplied to the normally open cooling fan
thermostat. Closing the main power switch supplies 120VAC to the main fan
motor, the cooling fan motors, the primary of the control transformer, the
conveyor motor and to the ignition control.
BURNER CIRCUIT Closing the main power switch supplies 120VAC to the burner blower motor.
120VAC is also supplied, through the main fan centrifugal switch (this switch
closes when the main fan reaches approx. 1600 RPM) and the normally closed
oven cavity hi-limit thermostat, to the primary of the burner transformer. 120VAC
is also supplied to the oven control.
IGNITION CONTROL The ignition control operates on both 24VAC and 120VAC. When the control is
energized by 24VAC from the transformer, 120VAC is switched by the ignition
control to the hot surface igniter for 45 seconds for the hot surface igniter warm
up. The igniter glows red, 24VAC is switched to the gas valve, which opens, and
ignition should now occur.
TEMPERATURE CONTROL Closing the main power switch supplies 120VAC to the primary of the oven
control transformer. Secondary voltage, 24VAC, is supplied to the oven control.
The oven control is set to desired temperature. The thermocouple will provide
varying millivolts to the oven control. The oven control supplies 120VAC to the
temperature regulation valve at intermittent intervals to maintain the desired
temperature. The display on the oven control will indicate when the temperature
regulation valve is energized.
NOTE: The display also indicates oven temperature.
CONVEYOR DRIVE Closing the main power switch supplies 120VAC to the conveyor motor and to
the primary of the control transformer. Secondary voltage, 24VAC, is supplied to
the oven control. Setting the oven control to the desired time outputs voltage,
through a reversing switch, to the conveyor motor.
NOTE: The conveyor system uses a hall effect sensor and magnet to prove
operation of the conveyor motor. If the conveyor motor is not running, “BELT
JAM” is indicated on the display.