Lincoln 1100 Series service manual SEQUENCE OF OPERATIONS 1152 thru

SEQUENCE OF OPERATIONS 1152 thru 1158

MODEL 1152	NAT.GAS	220 VAC	50 HZ	1 PHASE
MODEL 1153	L.P. GAS	220 VAC	50 HZ	1 PHASE
MODEL 1154	NAT. GAS	240 VAC	50 HZ	1 PHASE
MODEL 1155	L.P. GAS	240 VAC	50 HZ	1 PHASE
MODEL 1156	TOWN.GAS 220/240 VAC		50 HZ	1 PHASE
MODEL 1157	NAT. GAS	220/240 VAC	50 HZ	1 PHASE
MODEL 1158	L.P. GAS	220/240 VAC	50 HZ	1 PHASE

POWER SUPPLY	Electrical power to be supplied to the oven by a three conductor service.
CONTROL BOX AUTO COOL DOWN	When the temperature in the Control Box reaches
	120°F ± 3°F (48.9°C ± 1.7°C), the Cooling Fan Thermostat will switch
	power to the Control Box Cooling Fans. The Thermostat will interrupt
	power to the Cooling Fans when ‘the control box temperature falls to
	100°F ± 3°F (37.8°C ± 1.7°C).
MAIN FAN CIRCUIT	Power is permanently supplied to the normally open contacts of the oven
	fan relay, the normally open cooling fan thermostat, and to the normally
	open oven fan switch. Closing the fan switch supplies line voltage,
	through a 1A fuse, to the primary of the power transformer (the trans-
	former steps the voltage down to 120 VAC for the control circuit.) 120
	VAC is supplied to the cooling fans, terminal #1 of the time delay relay and
	to the coil of the oven start relay. These normally open contacts close
	enabling the 20 minute time delay relay. The 20 minute time delay relay
	supplies 120 VAC to the oven fan relay, its normally open contacts now
	close, supplying line voltage to the main fan motor.
BURNER CIRCUIT	Closing the Fan Switch supplies line voltage through the 3 amp fuse, and
	oven start relay (closed by activating the Relay in the main fan circuit).
	Closing the Burner Switch allows voltage to be supplied through the
	normally open gas pressure	switch(located in gas valve and closed
	when proper gas pressure is present), through the normally open Air
	Pressure Switch (closed by air pressure from main fan), through the
	normally closed oven cavity high limit thermostat (opens at 662°F (350°C)
	which is manually resetting after a 18°F(10°C) drop), and to the ignition
	control.
IGNITION CONTROL	The Ignition Control switches (220 or 240 VAC) to the combustion Blower
	Motor, the normally open combustion Air Switch closes upon sensing air
	pressure in the burner housing. After a pre-purge period of between 30
	and 60 seconds, the Spark Generator is energized, the Main Gas Valve
	Solenoid Valve and Burner Pilot Light are energized, and ignition should
	now occur.
	When the burner ignition occurs, the Flame Sensor must provide micro
	amps (normally 2-4 ) to the Ignition Control within 1 second or the burner
	system will shut down and the buzzer alarm will sound. To recycle the
	burner, switch off the burner switch (this will disable the buzzer), wait 30
	seconds, push IN the reset button for the ignition control, and turn on the
	Burner Switch. The burner sequence of events should now reoccur.
TEMPERATURE CONTROL	Closing the Fan Switch supplies 120 VAC to the Electronic Temperature
	Control. The 2.5K ohm Temperature Potentiometer is
Impinger II - 1100 Series Service Manual - International		9