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Impinger II – Advantage Digital Express Service Manual - Domestic
3
SEQUENCE OF OPERATION
IMPINGER II ADVANTAGE, ELECTRIC
(OVENS WITH PUSH BUTTON CONTROLS)
1130-080-A 120/208VAC 60 HZ. 1 PHASE
1130-080-A1 120/208VAC 60 HZ. 1 PHASE
1130-08H-A 208 VAC 60 HZ. 1 PHASE
1131-080-A 120/240VAC 60 HZ. 1 PHASE
1131-080-A1 120/240VAC 60 HZ. 1 PHASE
1131-08H-A 240 VAC 60 HZ. 1 PHASE
1132-080-A 120/208VAC 60 HZ. 3 PHASE
1132-080-A1 120/208VAC 60 HZ. 3 PHASE
1132-08H-A 208 VAC 60 HZ. 3 PHASE
1133-080-A 120/240VAC 60 HZ. 3 PHASE
1133-080-A1 120/240VAC 60 HZ. 3 PHASE
1133-08H-A 240 VAC 60 HZ. 3 PHASE
1161-080-A 120/240VAC 60 HZ. 1 PHASE
1162-080-A 120/208VAC 60 HZ. 3 PHASE
POWER SUPPLY Electrical power to be supplied to the oven by a three conductor service for
single phase and a four conductor service for three phase.
Black conductor is hot.
Red conductor is hot.
Orange conductor is hot (used for three phase only).
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 the 10 amp fuses, through the normally
closed oven cavity hi-limit thermostat, to the normally open main power switch.
Power is also supplied to the normally open cooling fan thermostat. Closing the
main power switch energizes the coil of the oven start relay, it’s contacts close
enabling the 20 minute time delay relay. The 20 minute time delay relay supplies
120VAC to the oven fan relay, these normally open contacts now close
supplying 208/240VAC to the main fan motor. 120VAC is also supplied to the
cooling fans. 208/240VAC is supplied to the primary of the control transformer,
the conveyor motor and, through the air pressure switch, to the oven control.
TEMPERATURE CONTROL Closing the main power switch supplies 208/240VAC to the primary of the
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 208/240VAC to
the coil of the heater relay at intermittent intervals to maintain the desired
temperature. The display on the oven control will indicate when the heater relay
is energized.
NOTE: The display also indicates oven temperature.
CONVEYOR DRIVE Closing the main power switch supplies 208/240VAC 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.
AUTOMATIC COOL DOWN When the oven is started, the time delay relay timing circuit is enabled,
permitting the oven fans to run approximately 20 minutes after the oven is shut
off, to cool the oven. The time delay relay will keep the coil of the fan relay
closed, maintaining operation of the main fan and cooling fans.