Lincoln 1100 Series Manuel D’Utilisation

MODEL 1151

ELECTRIC

200 VAC

60 HZ

3 PHASE

POWER SUPPLY

Electrical power to be supplied to the oven by a four conductor service.

CONTROL BOX AUTO

When the temperature in the control box reaches

COOL DOWN

120°F ± 3°F (48.9°C ± 1.7°C), the Cooling Fan

Thermostat closes, switching power to the Cooling Fans. The thermostat

will open at 100°F ± 3°F(37.8°C ± 1.7°C) interrupting power to Cooling

Fans.

MAIN FAN CIRCUIT

Power is permanently supplied through a 1A fuse to the primary of the

step-down transformer. The transformer steps the voltage down to 120

VAC for the control circuit. 120 VAC is supplied to terminal #1 of the 20

minute time delay relay, through the normally closed hi-limit thermostat, to

a normally open contact of the oven start relay, the cooling fan thermostat

and to the normally open main fan switch.

Closing the fan switch energizes the oven start relay. These normally open

contacts now close enabling the 20 minute timer delay. The 20 minute

time delay relay supplies 120 VAC to the coil of the oven fan relay, these

normally open contacts now close supplying 200 VAC to the main fan

motor. The cooling fans, time/temp display, conveyor switch and heat

switch are also energized.

HEATER CIRCUIT

Closing the Heater Switch supplies 120 VAC through the normally open

Air Pressure Switch (which was closed by Main Fan Air Pressure), through

the 3 Amp Fuse, to the Temperature Control Board and to the Heater

Lamp.

TEMPERATURE CONTROL

Closing the Heat Switch supplies 120 VAC to the Electronic Temperature

Control. The 2.5K ohm Potentiometer is adjusted to achieve the desired

temperature. The Thermocouple will provide varying  millivolts to the

Temperature Control.  The temperature control board then supplies 120

VAC to the coil of the Contactor at intermittent intervals to maintain the

desired temperature.

CONVEYOR DRIVE

Closing the Conveyor Switch supplies 120 VAC to the DC Motor Control

Board at terminals L1 and L2.  AC volts are converted to DC volts and are

supplied to the Conveyor Motor at terminals A+ and A-.  Adjustment

S/N 2011383 and above

of the Speed Control Potentiometer (5,000 ohm, 10 turn)

REFER TO PAGE B15

will change resistance at terminals P1, P2, and P3

varying the DC voltage to the Conveyor Motor. Thespeed of the conveyor

motor will increase or decrease as the DC voltage from the board in-

creases or decreases respectively. As the motor turns, it drives both the

reducergear box and the Tach. Generator. The tach. generatoris a DC

voltage generator which supplies a voltage to the DC Motor Control Board

and is used as a reference formaintaining a constant conveyor speed.

TIME/TEMP DISPLAY

The secondary output of the Display Transformer, is supplied to terminals

1, 2, and 3 of the Time/Temp. Display. The secondary output of Trans-

former is nominally 12.5 to 15 VAC with a center tap.  The voltage from

center tap to each leg is 1/2 the secondary voltage.

Impinger II - 1100 Series Service Manual - International

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