Lincoln 1117-000-A Manuel D’Utilisation

Impinger II – Advantage Service Manual - Domestic

SEQUENCE OF OPERATIONS

1130-000-A / 208V / SINGLE PHASE

1131-000-A / 240V / SINGLE PHASE

1132-000-A / 208V / THREE PHASE

1133-000-A / 240V / THREE PHASE

POWER SUPPLY

Electrical power to be supplied to the oven by a three-conductor service on single

phase and a four-conductor service on three phase.

Black conductor is Hot

Red conductor is Hot

Orange conductor is Hot (Used on 3 phase only)

Green conductor is ground.

CONTROL BOX AUTO COOL DOWN When the temperature in the control box reaches 120°F ± 3°F (48.9°F ± 1.7°C),

the cooling fan thermostat will switch power to the cooling fans. The thermostat

will interrupt power to the fans when the temperature falls to 100°F ± 3°F (37°C ±

1.7°C).

MAIN FAN CIRCUIT

Power is permanently supplied through the 10A fuses, through the normally

closed control box high limit thermostat, to the normally open main fan switch.

Power is also supplied to the normally open cooling fan thermostat. Closing the

main fan switch supplies 208/240 VAC to the main fan motor, the cooling fan

motor, to the primary of the temperature display transformer and to the heat and

conveyor circuits.

HEATER CIRCUIT

Closing the fan switch supplies 208/240 VAC, through the normally open air

pressure switch (closed by air pressure from the main fan) through the normally

closed oven cavity hi-limit thermostat, to the electronic temperature control. The

1K ohm temperature pot is adjusted to desired temperature. The thermocouple

will provide varying millivolts to the temperature controller. The temperature

control then supplies 208/240 VAC to the coil of the contactor at intermittent

intervals to maintain the desired temperature. The heat lamp is energized with

the contactor.

CONVEYOR DRIVE

Closing the on/off switch supplies 120 VAC to the motor control board. AC volts

are converted to DC volts and are supplied to the conveyor motor at terminals A+

and A-.

Adjustment of the speed control potentiometer will change resistance at terminals

P1 and P2 varying the DC voltage to the motor. The speed of the conveyor

motor will increase or decrease as the DC voltage from the board increases or

decreases respectively.

NOTE:

The conveyor control uses a sensor and magnet, mounted on the conveyor

motor that senses the motor speed. Any change in motor load (±RPM) is

detected by the sensor and the voltage to the motor is adjusted accordingly.

Temperature Display

Closing the switch supplies 120 VAC to the primary of the temperature display

transformer. The secondary of this transformer supplies 12 VAC to the

temperature display. The thermocouple supplies D.C. millivolts to the

temperature display. The display converts this millivolt reading to a temperature

reading.