Lincoln 1116-000-A Parts List

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 : (800) 374-3004
U.S. Fax: (888) 790-8193 • Int’l Fax: (260) 436-0735
Technical Service Hot Line
(800) 678-9511
www.lincolnfp.com
1100AdvSvc REV 1/5/07
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
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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
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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.
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Impinger II – Advantage Service Manual - Domestic
SCHEMATIC 1116-000-A, 1117-000-A
Impinger II –Advantage Service Manual - Domestic
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SCHEMATIC 1130-000-A / 1131-000-A
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Impinger II – Advantage Service Manual - Domestic
SCHEMATIC 1132-000-A / 1133-000-A
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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
Box
Main Fan Motor Check for opens, shorts, or grounds. WITH POWER
Capacitor Check for shorts or grounds.
No control box cooling Incoming Power Check main circuit breakers, reset if required, call
Main Fan Switch Check continuity between switch terminals Cooling Fan 120 VAC should now be at the fan motor. If voltage
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
Cooling Fan 120 VAC should be at the motor. If voltage is
Oven will not heat Gas Supply Check for adequate gas supply and closed manual
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
Centrifugal Switch Check for 120 VAC at lead #9 of Main Fan Motor (located at 6 pin connector in raceway near the main
Main Fan Switch Check continuity between switch terminals.
Check for voltage on both sides of the switch. 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.
OFF turn fan blade to check for locked rotor.
WARNING: Capacitor has a stored charge, discharge before testing.
power company if needed.
is present, check motors for shorts or opens. WITH POWER OFF: Check for locked rotor.
closes at 120°F and opens at 100°F). With the cooling fan thermostat preheated, check for continuity. If switch is open, replace.
present, check motor for shorts, opens, or grounds. WITH POWER OFF: check for locked rotor.
gas shut offs. Also, check flexible gas line connection.
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.
fan motor) to neutral. If no voltage is present, and motor is running, replace motor.
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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
Blower Motor
Check of 120 VAC at motor connector, on wire #13 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.
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Power Supply If there is sufficient micro-amp current, but the flame
and close. Also check for opens or shorts in the coil.
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
ignition control.
NOTE: Flame should be lit at
this time. Low flame is on, but no main flame
Temperature Control Check for 120 VAC at terminal #7
to neutral on temperature control. If no voltage, trace voltage back through centrifugal switch and hi­limit. 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
Intermittent Heating Thermal/Overload of Main Fan
and Burner Blower Motors
Conveyor will not run Voltage Supply Check incoming voltage supply at line 1 to neutral.
10 Amp Fuse Check and/or replace. Fuseholder Check and/or replace. Fan Switch See procedure for checking on Page 10.
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Replace as necessary.
The main fan motor and the burner blower motor are
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.
There should be a voltage reading of 120 VAC. If
not present, check breakers.
Impinger II – Advantage Service Manual - Domestic
Speed Adjustment
Potentiometer
This is a 0 to 10 K ohm, 1 turn potentiometer. With
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 intermittent
Power Supply Check power supply at the DC control board for the
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.
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