Lincoln 1100 Series Manuel D’Utilisation

MODEL 1104

ELECTRIC

380/220 VAC

50 HZ

3 PHASE

MODEL 1105

ELECTRIC

415/240 VAC

50 HZ

3 PHASE

MODEL 1106

ELECTRIC

240 VAC

50 HZ

1 PHASE

POWER SUPPLY

Electrical power to be supplied to the oven by a five conductor service on

Models 1104 and 1105 and a

three conductor service on the 1106.

MAIN FAN CIRCUIT

Power is permanently supplied (through a 10A fuse) to the normally open

contact of the main fan relay, the normally open cool-down thermostat and

to the normally open main fan switch. Closing the main fan switch supplies

line voltage to the primary of the power transformer (The transformer steps

the voltage down to 120 VAC for the control circuit).  120 VAC is supplied

to the coil of the main fan relay, its normally open contacts now close,

energizing the main fan motor.  Closing the main fan switch also supplies

120 VAC to the cooling fan and, through a normally closed hi-limit thermo-

stat, the time/temp display, heat and conveyor switches.

HEATER CIRCUIT

Closing the Heater Switch provides power through the normally open Air

Pressure Switch 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.

NOTE:  Units with Serial Number prior to 2000782 were equipped with a

Fenwall Temperature Control and used a Temperature Control Potentiom-

eter rated at 5K ohms.

CONVEYOR DRIVE

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

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

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

Speed Control Potentiometer (5,000 ohm, 10 turn) will change resistance

at terminals P1, P2, and P3 varying the DC voltage to the Conveyor Motor.

The speed of the conveyor motor will increase or decrease as

the DC

voltage from the board increases or decreases respectively. As the motor

turns, it drives both the reducer gear box and the tach. generator. The

tach. generator is a DC voltage generator which supplies a voltage to the

DC Motor Control Board  and is used as a

reference for maintaining

a constant conveyor speed.

TIME/TEMP DISPLAY                               The secondary output of the Transformer, is supplied to terminals 1, 2,

and 3 of the Time/Temp. Display. The secondary output of the Transformer

is nominally 12. to 15 VAC with a center      tap. The voltage from center

tap to each leg is 1/2 the secondary voltage

The speed side of the Time/Temp. Display uses a slotted disc (cemented

to tach. coupling) to break the infra-red light beam of the optical encoder

(mounted on gear motor) producing electrical pulses that are transmitted

to the display. The display converts these pulses into a read-out of min

The temperature portion of the Time/Temp Display uses a Thermistor

Impinger II - 1100 Series Service Manual - International

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