Lincoln Impinger II - Advantage User Manual

SERVICE MANUAL

(DOMESTIC)

IMPINGER CONVEYOR OVENS

IMPINGER II - ADVANTAGE SERIES

Lincoln Foodservice Products, LLC

1111 North Hadley Road

Fort Wayne, Indiana 46804

United States of America

Phone: [phone]

U.S. Fax: [phone] • Int’l Fax: [phone]

Technical Service Hot Line

[phone]

www.lincolnfp.com

1100AdvSvc

REV 3/20/08

TABLE OF CONTENTS
TABLE OF CONTENTS	2
SEQUENCE OF OPERATIONS	4
SEQUENCE OF OPERATIONS	5
SCHEMATIC 1116-000-A, 1117-000-A	6
SCHEMATIC 1130-000-A / 1131-000-A	7
SCHEMATIC 1132-000-A / 1133-000-A	8
TROUBLESHOOTING GUIDE / GAS OVENS	9
TROUBLESHOOTING GUIDE / ELECTRIC OVENS	14
REMOVAL, INSTALLATION, AND ADJUSTMENT	18
PARTS / GENERAL	26
BLOW UP / GENERAL	27
PARTS / CONTROL BOX 1116-000-A, 1117-000-A	28
BLOW UP / CONTROL BOX – 1116-000-A, 1117-000-A	29
PARTS / CONTROL BOX – 1130-000-A THRU 1133-000-A	30
BLOW UP / CONTROL BOX – 1130-000-A THRU 1133-000-A	31
PARTS / CONVEYOR & DOOR	32
BLOW UP / CONVEYOR & DOOR	33
PARTS / OVEN BACK ASSEMBLY	34
BLOW UP / OVEN BACK ASSEMBLY	35

2	Impinger II – Advantage Service Manual - Domestic

SEQUENCE OF OPERATIONS

IMPINGER II ADVANTAGE

MODEL 1116-000-A / NATURAL GAS / 120 VAC / 60 HZ / 1 PHASE

MODEL 1117-000-A / L.P. GAS / 120 VAC / 60 HZ / 1 PHASE

POWER SUPPLY	Electrical power is supplied to the oven by a three conductor cordset. Voltage
	from the black conductor to the white conductor is 120 VAC. The white
	conductor is neutral. The green conductor is ground.
CONTROL BOX AUTO	When the temperature in the control box reaches 120°F ± 3° (48.9°C ± 1.7°C),
	the
COOL DOWN	interrupt power to the fans when the control box temperature falls to 100°F ± 3°
	(37.8°C ± 1.7°C).
MAIN FAN CIRCUIT	Power is permanently supplied, through a 10A fuse, and through a normally
	closed control box hi-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 120 VAC to the main fan motor, the cooling fan motor,
	the primary of the temperature display transformer, the heat and conveyor
	circuits.
BURNER CIRCUIT	Closing the main fan switch supplies 120 VAC to the burner blower motor. 120
	VAC is also supplied, through the normally closed oven cavity hi-limit thermostat,
	the main fan centrifugal switch (this switch closes when main fan reaches
	approximately 1600 RPM) to the electronic temperature control and to the
	primary of the burner transformer.
IGNITION CONTROL	The ignition control operates on both 24 VAC and 120 VAC. When the control is
	energized by 24 VAC from the transformer, 120 VAC is switched by the ignition
	control to the hot surface ignitor for 45 seconds for the hot surface ignitor warm
	up. The ignitor glows red, 24 VAC is switched to the gas valve which opens and
	ignition should now occur.
TEMPERATURE CONTROL	When the centrifugal switch of the main fan motor closes, power is applied to the
	temperature control. The 1K ohm temperature pot is adjusted to desired
	temperature. The thermocouple will provide varying millivolts to the temperature
	controller. The temperature controller supplies 120 VAC to the solenoid valve at
	intermittent intervals to maintain desired temperature. The heat lamp is
	energized with the solenoid valve.
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.

Impinger II –Advantage Service Manual - Domestic

3

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.

4	Impinger II – Advantage Service Manual - Domestic

SCHEMATIC 1116-000-A, 1117-000-A

Impinger II –Advantage Service Manual - Domestic

5

SCHEMATIC 1130-000-A / 1131-000-A

6	Impinger II – Advantage Service Manual - Domestic

SCHEMATIC 1132-000-A / 1133-000-A

Impinger II –Advantage Service Manual - Domestic

7

TROUBLESHOOTING GUIDE / GAS OVENS

	MODEL 1116-000-A		NATURAL GAS		120 VAC	60 HZ	1 PHASE
	MODEL 1117-000-A		LP GAS		120 VAC	60 HZ	1 PHASE
	SYMPTOM	POSSIBLE CAUSE		EVALUATION
	Oven fan will not run	Incoming Power Supply		Check breakers, reset it required. Check power plug
				to be sure it is firmly in receptacle. Measure
				incoming power/call power company if needed.
		Fuse, 10 Amp		Check, replace if necessary.
		Fuse Holder		Check, replace if necessary.
		Hi Limit Thermostat-Control		Check for voltage on both sides of the switch.
		Box		Terminals are normally closed. If open, reset and
				test oven for proper operation. If thermostat will not
				hold and control box temperature is not exceeding
				140°F (60°), replace thermostat.
		Main Fan Switch		Check continuity between switch terminals.
		Main Fan Motor		Check for opens, shorts, or grounds. WITH POWER
				OFF turn fan blade to check for locked rotor.
		Capacitor		Check for shorts or grounds.
				WARNING: Capacitor has a stored charge,
				discharge before testing.
	No control box cooling	Incoming Power		Check main circuit breakers, reset if required, call
				power company if needed.
		Main Fan Switch		Check continuity between switch terminals
		Cooling Fan		120 VAC should now be at the fan motor. If voltage
				is present, check motors for shorts or opens. WITH
				POWER OFF: Check for locked rotor.
	No automatic control	Incoming Power Supply		Check circuit breakers,
	box cooling			reset if required. Call the power company if needed.
		Cooling Fan Thermostat		Check the cooling fan thermostat. (Thermostat
				closes at 120°F and opens at 100°F). With the
				cooling fan thermostat preheated, check for
				continuity. If switch is open, replace.
		Cooling Fan		120 VAC should be at the motor. If voltage is
				present, check motor for shorts, opens, or grounds.
				WITH POWER OFF: check for locked rotor.
	Oven will not heat	Gas Supply		Check for adequate gas supply and closed manual
				gas shut offs. Also, check flexible gas line
				connection.
		Main Fan		If not operating, refer to "Oven fan will not run".
		High Limit Oven Cavity		Terminals are normally closed. If
		Thermostat		open, push in reset button and retest. If thermostat
				will not hold for maximum oven temperature, and
				oven is not exceeding temperature dial setting,
				check for proper location of capillary bulb in its
				spring holder. If above checks okay, replace hi-limit
				thermostat.
		Centrifugal Switch		Check for 120 VAC at lead #9
		of Main Fan Motor		(located at 6 pin connector in raceway near the main
				fan motor) to neutral. If no voltage is present, and
				motor is running, replace motor.
8					Impinger II – Advantage Service Manual - Domestic

	Burner Blower Motor	Visually check to see if motor is running. If not,
		check for 120 VAC to motor at motor connector (wire
		#5 and #22). If voltage is not present, trace wiring
		back to fan switch. If voltage is present and motor is
		not running, check for opens, shorts, or grounds.
		Also, WITH POWER OFF: check for locked rotor.
	Transformer, Burner	Primary is 120 VAC with 24 VAC secondary. If 120
		VAC is not present, trace wiring back to Main Fan
		Centrifugal Switch. If 120 VAC is present, check for
		24 VAC at secondary of transformer. If no voltage is
		present, replace transformer.
	Centrifugal Switch of Burner	Check of 120 VAC at motor connector, on wire #13
	Blower Motor	to neutral. If voltage is not present, trace wiring back
		to transformer. If voltage is not present and motor is
		running, replace the burner blower motor.
	Ignition Control	24 volts should be present at 24 volt terminals. If not
		present, trace wiring back to centrifugal switch.
		When 24 VAC is supplied, the control switches 120
		VAC from L1 and L2 to the hot surface ignitor. if 120
		VAC is not present at L1 and L2, trace wiring
		back to fan switch. If 24 VAC and 120 VAC are
		present and 120 VAC is not across the hot surface
		ignitor terminals, replace the ignition control.
	Hot Surface Ignitor	If 120 VAC is present at hot surface ignitor terminals,
		visually check to see that the ignitor is heating.
		(Ignitor may be viewed through the port glass in end
		of burner tube.) The ignitor should glow bright red.
		If the ignitor does not heat, replace the ignitor.
	Ignition Control	After 45 seconds of hot surface ignitor pre-heat, the
		ignition control will switch 24 VAC to the gas control
		valves. Check for 24 VAC output from ignition
		control, across terminals marked "valve" and "valve
		ground". If no voltage is present, replace ignition
		control.
	Gas Control Valves	When 24 VAC is supplied to the gas control valve,
		the valve should open. Check for gas pressure at
		the manifold tap located just before the burner. If
		there is no pressure, check the incoming gas supply
		to be sure all manual valves are open and flexible
		gas hose is properly connected. If gas is present
		and coils of gas valve are energized, the gas valve is
		probably defective.
Flame will not stay lit	Hot Surface Ignitor	Six seconds after the gas valve opens, ignition must
		occur. if flame is not detected, the ignition control
		will shut off and lock out. To reset the ignition
		control, turn off the burner switch for 45 seconds,
		then turn on the burner switch to retry ignition. The
		ignition control requires a minimum of 0.8 D.C.
		microamps. To check flame sensing operation,
		connect a digital multimeter (capable of measuring
		D.C. micro-amps) between the "ground" terminal on
		ignition control and the ground lead.
		NOTE: This is a current measurement and the
		meter must be connected in series. If these
		readings are not achieved, replace the hot surface
		ignitor.
		NOTE: The D.C. micro amp test must be conducted
		with the oven in low flame (bypass) operation. Turn
		the temperature control to the lowest setting.

Impinger II –Advantage Service Manual - Domestic

9

	Power Supply	If there is sufficient micro-amp current, but the flame
		will not stay lit, check for proper polarity of the 120
		VAC power supply.
	Ignition Control	If there is sufficient micro-amp current, and the 120
		VAC polarity is correct, but the flame will not stay lit,
		replace ignition control.
		NOTE: Check for proper ground connection on
	NOTE: Flame should be lit at	ignition control.
	this time.
Low flame is on,	Temperature Control	Check for 120 VAC at terminal #7
but no main flame		to neutral on temperature control. If no voltage,
		trace voltage back through centrifugal switch and hi-
		limit. Turn the temperature adjustment knob to
		maximum temperature position and check for 120
		VAC at the load terminal #8 and neutral. If 120 VAC
		is present and unit is not heating, refer to
		"Temperature Solenoid Valve" for next check. If 120
		VAC is not present, proceed.
	Thermocouple Probe	WITH POWER ON AND THERMOCOUPLE LEADS
		ATTACHED TO THE TEMPERATURE CONTROL
		BOARD: Measure the D.C. millivolt output of these
		leads. Refer to thermocouple chart in Section D for
		proper readings. If these readings are not achieved,
		replace the thermocouple.
	Temperature Set	Disconnect the potentiometer leads
	Potentiometer	from the board. Place ohm meter test leads on the
		blue and green pot leads. Reading should be 1 K
		ohms. Place meter leads across the blue and purple
		pot leads and rotate knob from high to low. Repeat
		on green and purple leads. Check for even rise and
		fall of ohms reading to insure that there are no open
		or dead spots in the potentiometer. Check each
		lead to ground for shorts. Replace pot if it does not
		meet the above test.
	Temperature Solenoid	If 120 VAC is present on the
	Valve	temperature control board at load terminal #8 to
		neutral, check for voltage at temperature regulation
		valve. If voltage is present, listen for valve to open
		and close. Also check for opens or shorts in the coil.
		Replace as necessary.
Intermittent Heating	Thermal/Overload of Main Fan	The main fan motor and the burner blower motor are
	and Burner Blower Motors	equipped with internal thermal protection and will
		cease to operate if over heating occurs. As the
		motors overheat and then cool, this will cause the
		units to cycle on and off intermittently. This may be
		caused by improper ventilation or preventive
		maintenance. Also, most of the problems listed
		under "Oven will not heat" can cause intermittent
		failure.
Conveyor will not run	Voltage Supply	Check incoming voltage supply at line 1 to neutral.
		There should be a voltage reading of 120 VAC. If
		not present, check breakers.
	10 Amp Fuse	Check and/or replace.
	Fuseholder	Check and/or replace.
	Fan Switch	See procedure for checking on Page 10.

10	Impinger II – Advantage Service Manual - Domestic

	Speed Adjustment	This is a 0 to 10 K ohm, 1 turn potentiometer. With
	Potentiometer	power off, remove the black and white pot leads
		from the motor control board at terminals P1, P2.
		Place the meter leads on the black lead (P2) and on
		the white lead (P1). Rotating the pot., slowly, from
		low to high, the meter readings should show an even
		transition from 0 to 10 K ohms ± 5%. There should
		be no dead or open spots through out the 1 turn of
		the pot. Check both leads to ground. There should
		be no continuity to ground. If any of the above
		checks fail, replace the pot.
	DC Motor Control Board	Check for 120 VAC input to the control board at
		terminals L1 and L2. If not present, check wiring
		back to the oven fan switch. If 120 VAC is present
		at L1 and L2, check both fuses on control board (8A
		line and 1A armature), check the VDC output at
		terminals A+ and A-. If 120 VAC is present at
		terminals L1 and L2 and DC voltage is present at
		A+ and A-, but the motor does not run, check gear
		motor as follows:
	Conveyor Gear Motor	If DC voltage is present at A+ and A- and the motor
		does not run, first check the mini breaker and then
		the conveyor. Refer to the next possible cause.
		Check the leads to the motor for evidence of any
		shorts or opens, and each lead to ground. Check
		motor brushes. From the top of the motor, rotate
		motor shaft to determine if there is a locked rotor or
		a locked gear box (use care so magnet and H.S.
		board are not damaged). Replace motor as needed.
	Conveyor	Check for any mechanical misalignment. Also,
		check for worn bearings. A conveyor belt that is
		over tightened will cause excessive bearing wear
		and sometimes, irregular speed.
Conveyor speed varying or	Power Supply	Check power supply at the DC control board for the
intermittent		120 VAC at board terminals L1 and L2.
	Motor Control Board	Place the test meter probes on terminals A+ and A-.
		(With speed potentiometer set to maximum speed
		(Approximately 2 min.) The meter reading should be
		approximately 100 VDC (±3%), if voltage is not
		steady within limits, then the board is probably bad.
		Always check the speed pot., be sure it is okay
		before changing a board. This test is not always
		100% accurate as this test is not performed at
		operating speeds. However, this test is the best
		method currently available.
	DC Gearmotor	If the DC control board is steady then the problem
		may be the motor or gearbox. Check the brushes in
		the motor for excessive arching and/or unusual
		wear. Check the motor and gearbox from instruction
		located on Page 11 under "possible cause" listing
		"conveyor gear motor."
	Magnet	Check to insure that the magnet (cemented to shaft
		of conveyor drive motor) has not been damaged, or
		come loose from motor shaft. Replace as needed.
	Hall Effect Sensor	Check for any physical damage to hall effect sensor
		(mounted on conveyor drive motor.) Check all wiring
		and connections for damage. Check all connections
		for tightness or proper location and check all wiring
		for visible damage. Replace as needed. Connect
		new hall effect to system and check for steady
		operation.
Impinger II –Advantage Service Manual - Domestic		11