Lincoln 1100 Series service manual SEQUENCE OF OPERATION 1134 - 1135 - 1136

SEQUENCE OF OPERATION 1134 - 1135 - 1136 - 1150

MODEL 1134	ELECTRIC	220/380 VAC	50 HZ	3 PHASE
MODEL 1135	ELECTRIC	240/415 VAC	50 HZ	3 PHASE
MODEL 1136	ELECTRIC	240 VAC	50 HZ	1 PHASE
MODEL 1150	ELECTRIC	220/380 VAC	50 HZ	3 PHASE

POWER SUPPLY	Electrical power to be supplied to the oven by a three conductor service on
	single phase and a five conductor service on three phase.
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 the Cooling Fans.
MAIN FAN CIRCUIT	Power is supplied by Line 1 on Model 1136 and L2 on 1134, 1135, and
	1150 to the normally open main fan relay. Power is also supplied from Line
	1, through the 1 Amp Fuse to the primary of the Step Down Transformer.
	120 V AC is continuously supplied from Transformer secondary to terminal
	number 1 of the 20 Minute Timer and through the High Limit Thermostat
	(normally closed) to the Main Fan Switch. Closing the Fan Switch ener-
	gizes the coil of the oven start relay, its contacts close enabling the 20
	minute time delay module. The 20 minute time delay module supplies 120
	VAC to the oven fan relay, this normally open contact now closes supply-
	ing line voltage to the main fan motor. The cooling fans and the time/temp
	display transformer are also energized.
HEATING CIRCUIT	Closing the Heat Switch supplies 120 volts AC through the normally open
	Air Pressure Switch (closed by air pressure from the Main Fan), the 3
	Amp Fuse, to terminal L1 of the Temperature Control Board, and the Heat
	Indicator Light.
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 P3varying 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 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 for maintaining 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 the 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.
	The speed side of the Time/Temp. Display uses a slotted disc
Impinger II - 1100 Series Service Manual - International			5