Garland 1116-000-A Service Manual download (Page 3 of 32)

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Manual type:Service Manual
Pages:32
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Page 3 of 32
Impinger II – Advantage Digital Service Manual - Domestic
3
SEQUENCE OF OPERATION
IMPINGER II ADVANTAGE
SERIAL NUMBER 2038616 AND ABOVE
(OVENS WITH PUSH BUTTON CONTROLS)
1130-000-A
208VAC
60 HZ.
1 PHASE
1131-000-A
240VAC
60 HZ.
1 PHASE
1132-000-A
208VAC
60 HZ.
3 PHASE
1133-000-A
240VAC
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).
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 fan. The
thermostat will interrupt power to the cooling fan 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 control box 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 supplies 208/240VAC to the main fan motor, the cooling fan
motor, the primary of the control transformer, the conveyor motor and 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.
Sample