SERVICE MANUAL
(DOMESTIC)
IMPINGER CONVEYOR OVENS
MODEL
1116-080-A, 1116-080-A1, 1117-080-A, 1117-080-A1,
1130-080-A, 1130-080-A1, 1131-080-A, 1131-080-A1,
1132-080-A, 1132-080-A1, 1133-080-A, 1132-080-A1,
1130-08H-A, 1131-08H-A, 1132-08H-A, 1133-08H-A,
1161-080-A, 1162-080-A
WITH PUSH BUTTON CONTROLS
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
Imp2DigAdvServ
REV 3/20/08
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SEQUENCE OF OPERATION
IMPINGER II ADVANTAGE, ELECTRIC
(OVENS WITH PUSH BUTTON CONTROLS)
1130-080-A
1130-080-A1
1130-08H-A
1131-080-A
1131-080-A1
1131-08H-A
1132-080-A
1132-080-A1
1132-08H-A
1133-080-A
1133-080-A1
1133-08H-A
1161-080-A
1162-080-A
120/208VAC
120/208VAC
208 VAC
120/240VAC
120/240VAC
240 VAC
120/208VAC
120/208VAC
208 VAC
120/240VAC
120/240VAC
240 VAC
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
1 PHASE
1 PHASE
1 PHASE
1 PHASE
1 PHASE
1 PHASE
3 PHASE
3 PHASE
3 PHASE
3 PHASE
3 PHASE
3 PHASE
1 PHASE
3 PHASE
120/240VAC
120/208VAC
POWER SUPPLY
Electrical power to be supplied to the oven by a three conductor service for
single phase and a four conductor service for three phase.
Black conductor is hot.
Red conductor is hot.
Orange conductor is hot (used for three phase only).
White conductor is neutral.
Green conductor is ground.
CONTROL BOX AUTO
COOL DOWN
When the temperature in the control box reaches 120°F ± 3° (48.9°C ± 1.7°), 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° (37.8°C ± 1.7°).
MAIN FAN CIRCUIT
Power is permanently supplied through the 10 amp fuses, through the normally
closed oven cavity hi-limit thermostat, to the normally open main power switch.
Power is also supplied to the normally open cooling fan thermostat. Closing the
main power switch energizes the coil of the oven start relay, it’s contacts close
enabling the 20 minute time delay relay. The 20 minute time delay relay supplies
120VAC to the oven fan relay, these normally open contacts now close
supplying 208/240VAC to the main fan motor. 120VAC is also supplied to the
cooling fans. 208/240VAC is supplied to the primary of the control transformer,
the conveyor motor and, through the air pressure switch, to the oven control.
Closing the main power switch supplies 208/240VAC to the primary of the
control transformer. Secondary voltage, 24VAC, is supplied to the oven control.
The oven control is set to desired temperature. The thermocouple will provide
varying millivolts to the oven control. The oven control supplies 208/240VAC to
the coil of the heater relay at intermittent intervals to maintain the desired
temperature. The display on the oven control will indicate when the heater relay
is energized.
TEMPERATURE CONTROL
NOTE: The display also indicates oven temperature.
CONVEYOR DRIVE
Closing the main power switch supplies 208/240VAC to the conveyor motor and
to the primary of the control transformer. Secondary voltage, 24VAC, is supplied
to the oven control. Setting the oven control to the desired time outputs voltage,
through a reversing switch, to the conveyor motor.
NOTE: The conveyor system uses a hall effect sensor and magnet to prove
operation of the conveyor motor. If the conveyor motor is not running, “BELT
JAM” is indicated on the display.
AUTOMATIC COOL DOWN
When the oven is started, the time delay relay timing circuit is enabled,
permitting the oven fans to run approximately 20 minutes after the oven is shut
off, to cool the oven. The time delay relay will keep the coil of the fan relay
closed, maintaining operation of the main fan and cooling fans.
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SCHEMATIC DIAGRAM
MODEL 1116-080-A, 1116-080-A1, 1117-080-A, 1117-080-A1
4
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SCHEMATIC DIAGRAM
MODEL 1130-080-A, 1130-080-A1, 1131-080-A, 1131-080-A1
SCHEMATIC DIAGRAM
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MODEL 1132-080-A, 1132-080-A1, 1133-080-A, 1133-080-A1
6
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SCHEMATIC DIAGRAM
MODEL 1161-080-A
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SCHEMATIC DIAGRAM
MODEL 1162-080-A
8
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SCHEMATIC DIAGRAM
MODEL 1130-08H-A, 1131-08H-A
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SCHEMATIC DIAGRAM
MODEL 1132-08H-A, 1133-08H-A
10
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TROUBLESHOOTING GUIDE
GAS OVENS
MODEL 1116-080-A
NAT. GAS
NAT. GAS
LP GAS
120VAC
60 HZ.
60 HZ.
60 HZ.
60 HZ.
MODEL 1116-080-A1
MODEL 1117-080-A
MODEL 1117-080-A1
120VAC
120VAC
120VAC
LP GAS
SYMPTOM
POSSIBLE CAUSE
EVALUATION
Oven fan will not run
Incoming power supply
Check circuit breakers, reset if required. Check
power plug to be sure it is firmly in receptacle.
Measure incoming power, call power co. if needed.
Check, replace if necessary.
Fuse, 10 Amp
Fuse holder
Check, replace if necessary.
Hi-limit thermostat,
control box
Check for voltage on both sides of 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°C), replace thermostat.
Switch, main power
Main fan motor
Check continuity between switch terminals. Replace
switch as needed.
Check for 120VAC at motor. If no voltage is present,
trace wiring back to main power switch.
WITH POWER OFF: Check for opens, shorts or
grounds. Turn fan blade to check for locked rotor.
Check for shorts or grounds.
Capacitor
WARNING: Capacitor has a stored charge,
discharge before testing.
No control box cooling
Incoming power
Check circuit breakers, reset if required. Check
power plug to be sure it is firmly in receptacle.
Measure incoming power, call power co. if needed.
Check continuity between switch terminals. Replace
switch as needed.
Check for 120VAC at cooling fan. If no voltage is
present, trace wiring back to power switch. If voltage
is present, and motor does not run, check for opens,
shorts or grounds.
Switch, main power
Cooling fan
WITH POWER OFF: Check for locked rotor.
Check circuit breakers, reset if required. Check
power plug to be sure it is firmly in receptacle.
Measure incoming power, call power co. if needed.
Check the cooling fan thermostat. (Thermostat
closes at 120°F and opens at 100°F). With the
cooling fan thermostat pre-heated, check for
continuity. If switch is open, replace cooling fan
thermostat.
No automatic control box
cooling
Incoming power supply
Cooling fan thermostat
Cooling fan
Check for 120VAC at cooling fan. If no voltage is
present, trace wiring back to cooling fan thermostat.
If voltage is present, and motor does not run, check
for opens, shorts or grounds.
WITH POWER OFF: Check for locked rotor.
Check for adequate gas supply to oven.
Check to see that the manual gas shut off valve is
open. Also check flexible gas line connection for any
damage.
Oven will not heat
Gas supply
Manual gas shut off valve.
Main fan
If not operating, refer to “Oven fan will not run”.
Centrifugal switch of main fan
motor
Check for 120VAC at wire #5 (input to centrifugal
switch, located at 6-pin connector in raceway near
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the main fan motor) to neutral. If no voltage is
present, trace wiring back to the main power switch.
If voltage is present, check for 120VAC at wire #22
(output of centrifugal switch) to neutral. If no voltage
is present at #22, and the motor is running, replace
the main fan motor.
Hi-limit thermostat,
oven cavity
Terminals are normally closed. If open, reset
thermostat and retest. If thermostat will not hold for
maximum oven temperature, and oven is not
exceeding temperature setting, check for proper
location of capillary bulb in its spring holder. If the
capillary checks okay, replace the hi-limit thermostat.
Check for 120VAC supplied to burner blower motor
at wire #13 to neutral. If no voltage is present, trace
wiring back to the main power switch. If voltage is
present, and the motor is not running, check for
opens, shorts or grounds.
Burner blower motor
Burner transformer
WITH POWER OFF: Turn motor to check for locked
rotor.
Check for 120VAC supplied to the primary of the
burner transformer. If no voltage is present, trace
wiring back to the oven cavity hi-limit thermostat. If
voltage is present, check for 24VAC at transformer
secondary. If there is primary voltage but no
secondary voltage, replace burner transformer.
Check for 24VAC at motor connector, wire #13 to
neutral. If voltage is not present, trace wiring back to
transformer. If voltage is present, check for voltage at
wire #14 to neutral. If no voltage is present at wire
#14, and motor is running, replace burner blower
motor.
Centrifugal switch of burner
blower motor
Ignition control
Check for 24VAC at ignition control terminals marked
“24V”, if no voltage is present, trace wiring back to
centrifugal switch. Check for 120VAC to ignition
control at terminal “L1” to neutral. If no voltage is
present, trace wiring back to main power switch.
When 24VAC is supplied to the ignition control, the
ignition control switches 120VAC to the hot surface
igniter If 24VAC and 120VAC are supplied to ignition
control, but there is no voltage at the hot surface
igniter, replace the ignition control.
Hot surface igniter
Ignition control
If 120VAC is present at hot surface igniter terminals,
visually check to see that the igniter is heating
(igniter may be viewed through the port in the end of
burner tube). The igniter should glow bright red. If the
igniter does not heat, replace the hot surface igniter.
After 45 seconds of hot surface igniter pre-heat, the
ignition control will switch 24VAC to the gas control
valves. Check for 24VAC output from ignition control
across terminals marked “valve” and “valve gnd”. If
no voltage is present, replace ignition control.
When 24VAC is supplied to the gas control valves,
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 the
gas control valve is energized, but there is no gas
pressure at the burner manifold, replace the gas
control valves.
Gas control valves
Flame will not stay lit
12
Hot surface igniter
Six seconds after the gas valve opens, ignition must
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occur. If flame is not detected, the ignition control will
shut off and lock out. To reset the ignition control,
turn off the power switch for 45 seconds, then turn
the switch on to re-try ignition. The ignition control
requires a minimum of 0.8 DC microamps to prove
flame. To check flame sensing operation, connect a
digital multimeter (capable of measuring DC
microamps) 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 hot
surface igniter.
NOTE: The DC microamp test must be conducted
with the oven in low flame (bypass) operation. Set
the temperature control to the lowest setting.
If there is sufficient microamp current, but the flame
will not stay lit, check for proper polarity of the
120VAC power supply.
If there is sufficient microamp current, and the
120VAC polarity is correct, but the flame will not stay
lit, replace the ignition control.
Power supply
Ignition control
NOTE: Check for proper ground connection on
ignition control.
NOTE: Flame should be on at
this time
Low flame is on,
but no main flame
Control transformer
Check for 120VAC supply to the primary of the
control transformer. If no voltage is present, trace
wiring back to the main power switch. If voltage is
present, check for 24VAC at the transformer
secondary. If there is primary voltage, but no
secondary voltage, replace the control transformer.
Check for 24VAC supply to control. If no voltage is
present, trace wiring back to control transformer. If
24VAC is present, check for a read-out on the
display. If there is 24VAC supplied, but there is no
read-out on the control display, replace the oven
control.
Oven control
If there is a read-out on the control, set the control to
maximum temperature (see installation operations
manual for temperature adjustment). With the control
set at maximum temperature, check for 120VAC at
the temperature regulation valve. If there is voltage at
the temperature regulation valve, proceed to
“Temperature regulation valve” for next check. If
there is no voltage at the temperature regulation
valve, trace wiring back to the oven control. If there is
no voltage output at the oven control, check the read-
out on the control. If the control reads “PROBE
FAIL”, this indicates that the thermocouple has failed
or become disconnected from the oven control.
Check to be sure that the thermocouple is securely
connected to the oven control. If the thermocouple is
connected to the oven control, and the control
indicates “PROBE FAIL”, disconnect the
Thermocouple
thermocouple from the oven control and measure the
resistance of the thermocouple. The thermocouple
should read approx. 11Ω. If these readings are not
achieved, replace the thermocouple. If these
readings are correct, proceed.
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Oven control
If the thermocouple checks good, but the oven
control display indicates that there is a thermocouple
failure, replace the oven control. If the oven control
indicates a temperature reading but the oven won’t
heat, proceed.
Thermocouple
WITH POWER ON AND THERMOCOUPLE
ATTACHED TO THE OVEN CONTROL: Measure
the DC millivolt output of the thermocouple. Refer to
the thermocouple chart (located in the “Removal”
section of the manual) for proper millivolt readings. If
these readings are not achieved, replace
thermocouple.
Oven control
If the thermocouple checks good, but there is no
120VAC output to the temperature regulation valve,
replace the oven control. If there is 120VAC output to
the temperature regulation valve, proceed.
Check for 120VAC supplied to temperature
regulation valve. If voltage is present, listen for valve
to open and close. Also check for opens or shorts in
the operating coil. Replace temperature regulation
valve as needed.
Temperature regulation valve
Intermittent heating
Thermal/overload of main fan
and burner blower motors
The main fan motor and burner blower motor are
equipped with internal thermal protection and will
cease to operate if overheating occurs. As the
motors overheat and then cool, this will cause the
heating system to cycle on and off intermittently.
Improper ventilation or lack of preventive
maintenance may cause this problem. Also, most of
the problems listed under “Oven will not heat” can
cause intermittent failure.
Conveyor will not run
Power supply
Check for incoming voltage at line 1 to neutral. There
should be a reading of 120VAC. If not present, check
circuit breakers.
Fuse, 10 Amp
Fuse holder
Check, replace if necessary.
Check, replace if necessary.
Hi-limit thermostat, control box Check for voltage on both sides of 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°C), replace thermostat.
Power switch
Check continuity between switch terminals. Replace
switch as needed.
Control transformer
Check for 120 VAC supply to the primary of the
control transformer. If no voltage is present, trace
wiring back to the oven power relay. If voltage is
present, check for 24 VAC at the transformer
secondary. If there is primary voltage but no
secondary voltage, replace control transformer.
Check for 120 VAC supply to the conveyor motor at
wire #14 to neutral. If no voltage is present, trace
wiring back to the primary of the control transformer.
If voltage is present and the motor will not run, check
the motor windings for opens or shorts.
WITH POWER OFF: Check the motor windings as
follows:
Conveyor motor
Grey to black - 38Ω approx.
Grey to blue - 38Ω approx.
Blue to black - 75Ω approx.
If any of the above fails, replace conveyor motor.
Check for shorts or grounds. Replace capacitor as
Capacitor, conveyor motor
14
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needed.
WARNING: Capacitor has a stored charge,
discharge before testing.
Switch, conveyor reversing
Oven control
Check continuity between switch terminals. Replace
switch as needed.
If there is 120VAC supplied to the motor, and the
motor, capacitor, and reversing switch check good,
replace the oven control.
Conveyor motor runs, but NOTE: Display will indicate
there is no speed display
“Belt Jam”
Oven control
Check for output voltage from oven control to hall
effect sensor (sensor is located in conveyor motor).
Measure voltage at the motor connector, red wire
and yellow wire. Voltage should be approx. 10VDC. If
no voltage is present, trace wiring back to oven
control. If there is no voltage present at the oven
control, replace the oven control.
Conveyor motor
Oven control
If there is voltage supplied to the hall effect sensor,
check for a frequency output from the hall effect
sensor. Measure frequency across the yellow and
white wires at the motor connector. Frequency
reading should be approx. 25 – 100 Hz. If these
readings are not achieved, replace conveyor motor. If
the readings are achieved, proceed.
If the hall effect sensor readings are correct, but
there is no speed indicated on the display, replace
the oven control.
TROUBLESHOOTING GUIDE
ELECTRIC OVENS
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1130-080-A
1130-080-A1
1130-08H-A
1131-080-A
1131-080-A1
1131-08H-A
1132-080-A
1132-080-A1
1132-08H-A
1133-080-A
1133-080-A1
1133-08H-A
1161-080-A
1162-080-A
120/208VAC
120/208VAC
208 VAC
120/240VAC
120/240VAC
240 VAC
120/208VAC
120/208VAC
208 VAC
120/240VAC
120/240VAC
240 VAC
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
60 HZ.
1 PHASE
1 PHASE
1 PHASE
1 PHASE
1 PHASE
1 PHASE
3 PHASE
3 PHASE
3 PHASE
3 PHASE
3 PHASE
3 PHASE
1 PHASE
3 PHASE
120/240VAC
120/208VAC
SYMPTOM
POSSIBLE CAUSE
EVALUATION
Oven fan will not run
Incoming power supply
Check circuit breakers. Reset if required. Call
power co. if needed.
Fuses, 10 Amp, motor and
controls
Check, replace if necessary.
Fuse holder
Check, replace if necessary.
Hi-limit thermostat,
Oven cavity
Terminals are normally closed. If open, reset
thermostat and retest. If thermostat will not hold
for maximum oven temperature, and oven is not
exceeding temperature setting, check for proper
location of capillary bulb in its spring holder. If the
capillary checks okay, replace the hi-limit
thermostat.
Switch, main power
Relay, oven start
Check continuity between switch terminals.
Replace switch as needed.
Check for 120VAC supplied to coil of relay. If no
voltage is present, trace wiring back to main
power switch. If voltage is present, check for pull
in of relay contacts. Replace relay as needed.
Check for 120VAC at terminal #1 to neutral on
time delay relay. If voltage is not present, trace
wiring back to 10A. fuse. If voltage is present at
terminal #1, check for 120VAC at terminal #2 to
neutral. If no voltage is present, and oven start
relay is closed, replace 20 minute time delay relay.
Check for 120VAC to coil of main fan relay. If no
voltage is present, trace wiring back to 20 minute
time delay relay. If voltage is present, check to
insure that relay contacts are closing. Replace
relay as needed.
20 minute time delay
Relay, main fan
Main fan motor
Check for supply voltage at motor. If no voltage is
present, trace wiring back to main fan relay.
WITH POWER OFF: Check for opens, shorts or
grounds. Turn fan blade to check for locked rotor.
Check for shorts or grounds.
Capacitor
WARNING: Capacitor has a stored charge,
discharge before testing.
No main fan cool down
20 Minute time delay
Check for 120VAC at terminal #2 to neutral while
the oven is ‘on’. Turn off the main fan switch,
120VAC should continue to be present for 20
minutes. If voltage is not present for approx. 20
minutes, replace the 20 minute time delay.
Check for 120VAC to relay coil, if no voltage is
present, trace wiring back to 20 minute time delay.
If voltage is present, be sure that relay contacts
stay closes during the 20 minute cool down.
Oven fan relay
16
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Replace relay as needed.
Main fan runs after
20 minute cool down
Oven start relay
Contacts should open when main power switch is
turned off. Replace relay as needed.
20 Minute time delay
120VAC at terminal #2 should discontinue approx.
20 minutes after main power is switched off. If the
oven start relay contacts are open, and the
voltage continues at terminal #2 of the 20 minute
timer, for more than 20 minutes, replace the 20
minute time delay.
Oven fan relay
Check to insure that the relay contacts are
opening after the relay coil is de-energized.
Replace relay as needed.
20 Minute time delay
NOTE: On/ off operation of the main power switch
will set the timer to 20 minutes. If the timer is
accidentally reset, turn off the main circuit breaker
for 15 seconds to cancel.
No control box cooling
Incoming power
Check circuit breakers, reset if required. Check
power plug to be sure it is firmly in receptacle.
Measure incoming power, call power co. if
needed.
Switch, main power
Cooling fan
Check continuity between switch terminals.
Replace switch as needed.
Check for supply voltage at cooling fan. If no
voltage is present, trace wiring back to power
switch. If voltage is present, and motor does not
run, check for opens, shorts or grounds.
WITH POWER OFF: Check for locked rotor.
Check circuit breakers, reset if required. Check
power plug to be sure it is firmly in receptacle.
Measure incoming power, call power co. if
needed.
Check the cooling fan thermostat. (Thermostat
closes at 120°F and opens at 100°F). With the
cooling fan thermostat pre-heated, check for
continuity. If switch is open, replace cooling fan
thermostat.
No automatic control box
cooling
Incoming power supply
Cooling fan thermostat
Cooling fan
Check for supply voltage at cooling fan. If no
voltage is present, trace wiring back to cooling fan
thermostat. If voltage is present, and motor does
not run, check for opens, shorts or grounds.
WITH POWER OFF: Check for locked rotor.
Check for main fan operation. If it is not operating,
refer to “Oven fan will not run”.
Oven will not heat
Main fan motor
Air pressure switch
This normally open switch should close when the
main fan is activated. Refer to the “Removal and
installation” section for proper adjustment.
Replace as needed.
Control transformer
Check for 120VAC supply to the primary of the
control transformer. If no voltage is present, trace
wiring back to the main power switch. If voltage is
present, check for 24VAC at the transformer
secondary. If there is primary voltage, but no
secondary voltage, replace the control
transformer.
Oven control
Check for 24VAC supply to control. If no voltage is
present, trace wiring back to control transformer. If
24VAC is present, check for a read-out on the
display. If there is 24VAC supplied, but there is no
read-out on the control display, replace the oven
control.
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If there is a read-out on the control, set the control
to maximum temperature (see installation
operations manual for temperature adjustment).
With the control set at maximum temperature,
check for supply voltage at mercury contactor. If
there is voltage at the mercury contactor, proceed
to “mercury contactor” for next check. If there is no
voltage at the mercury contactor, trace wiring back
to the oven control. If there is no voltage output at
the oven control, check the read-out on the
control. If the control reads “PROBE FAIL”, this
indicates that the thermocouple has failed or
become disconnected from the oven control.
Check to be sure that the thermocouple is
securely connected to the oven control. If the
thermocouple is connected to the oven control,
and the control indicates “PROBE FAIL”,
disconnect the thermocouple from the oven
control and measure the resistance of the
thermocouple. The thermocouple should read
approx. 11Ω. If these readings are not achieved,
replace the thermocouple. If these readings are
correct, proceed.
Thermocouple
Oven control
If the thermocouple checks good, but the oven
control display indicates that there is a
thermocouple failure, replace the oven control. If
the oven control indicates a temperature reading
but the oven will not heat, proceed.
Thermocouple
WITH POWER ON AND THERMOCOUPLE
ATTACHED TO THE OVEN CONTROL: Measure
the DC millivolt output of the thermocouple. Refer
to the thermocouple chart (located in the
“Removal” section of the manual) for proper
millivolt readings. If these readings are not
achieved, replace thermocouple.
Oven control
If the thermocouple checks good, but there is no
voltage output to the mercury contactor, replace
the oven control. If there is voltage output to the
mercury contactor, proceed.
Mercury contactor
Check for supply voltage to the contactor coil. If
voltage is present and the contactor will not
activate, replace the mercury contactor. Also
check each contactor for high voltage input and
output.
Heating element(s)
Check the Amp draw on each power leg for proper
load. Check the specification plate for rating
information. If the amp draw is high or low, check
the individual elements for opens, shorts and
proper resistance.
WITH POWER OFF: To check resistance of the
elements, remove all leads from the elements and
use a digital multimeter.
The element resistance is should be as follows:
208V – 27 ohms approx.
240V – 36 ohms approx.
Replace heating elements as needed.
Oven heats with switch off
Intermittent heating
Mercury contactor
The mercury contactor has probably failed in the
closed position. If there is no voltage to the
operating coil, but there is high voltage at the
contactor output, replace the mercury contactor.
The main fan motor is equipped with internal
Thermal/overload of motor
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thermal protection and will cease to operate if
overheating occurs. As the motor overheats and
then cools, this will cause the oven to cycle on and
off intermittently. Improper ventilation or lack of
preventive maintenance may cause this. Also,
most of the problems listed under “Oven will not
heat” can cause intermittent failure.
Conveyor will not run
Power supply
Check circuit breakers, reset if required. Check
power plug to be sure it is firmly in receptacle.
Measure incoming power, call power co. if
needed.
Fuse, 10 Amp
Fuse holder
Check, replace if necessary.
Check, replace if necessary.
Hi-limit thermostat, oven cavity Terminals are normally closed. If open, reset
thermostat and retest. If thermostat will not hold
for maximum oven temperature, and oven is not
exceeding temperature setting, check for proper
location of capillary bulb in its spring holder. If the
capillary checks okay, replace the hi-limit
thermostat.
Power switch
Check continuity between switch terminals.
Replace switch as needed.
Control transformer
Check for supply voltage to the primary of the
control transformer. If no voltage is present, trace
wiring back to the oven power relay. If voltage is
present, check for 24 VAC at the transformer
secondary. If there is primary voltage but no
secondary voltage, replace control transformer.
Check for supply voltage to the conveyor motor. If
no voltage is present, trace wiring back to the
primary of the control transformer. If voltage is
present and the motor will not run, check the
motor windings for opens or shorts.
WITH POWER OFF: Check the motor windings as
follows:
Conveyor motor
Grey to black - 240Ω approx.
Grey to tan - 240Ω approx.
Tan to black - 480Ω approx.
If any of the above fails, replace conveyor motor.
Check for shorts or grounds. Replace capacitor as
needed.
Capacitor, conveyor motor
WARNING: Capacitor has a stored charge,
discharge before testing.
Switch, conveyor reversing
Oven control
Check continuity between switch terminals.
Replace switch as needed.
If there is supply voltage to the motor, and the
motor, capacitor, and reversing switch check
good, replace the oven control.
Conveyor motor runs, but
there is no speed display
NOTE: Display will indicate
“Belt Jam”
Oven control
Check for output voltage from oven control to hall
effect sensor (sensor is located in conveyor
motor). Measure voltage at the motor connector,
red wire and yellow wire. Voltage should be
approx. 10VDC. If no voltage is present, trace
wiring back to oven control. If there is no voltage
present at the oven control, replace the oven
control.
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Conveyor motor
If there is voltage supplied to the hall effect
sensor, check for a frequency output from the hall
effect sensor. Measure frequency across the
yellow and white wires at the motor connector.
Frequency reading should be approx. 25 – 100
Hz. If these readings are not achieved, replace
conveyor motor. If the readings are achieved,
proceed.
Oven control
If the hall effect sensor readings are correct, but
there is no speed indicated on the display, replace
the oven control.
REMOVAL, INSTALLATION AND ADJUSTMENTS
IMPINGER II ADVANTAGE SERIES
CAUTION
BEFORE REMOVING OR INSTALLING ANY COMPONENT IN THE IMPINGER
OVEN BE SURE TO DISCONNECT ELECTRICAL POWER AND GAS SUPPLY.
MAIN FAN – REPLACEMENT
A. Shut off power at main breaker.
B. Remove motor cover from back of oven.
C. Disconnect wiring and mark for reassembly.
D. Remove bolts and slide back straight out of the oven.
E. Loosen the bolt from fan hub and remove fan from motor shaft.
NOTE: Measure distance from fan blade to rear wall assembly before removal to aid in reassembly.
F. Reassemble in reverse order and check system operation.
MOTOR, MAIN FAN – REPLACEMENT
A. Shut off power at main breaker.
B. Remove motor cover from back of oven.
C. Disconnect wiring and mark for reassembly.
D. Remove bolts and slide back straight out of the oven.
E. Loosen the bolt from fan hub and remove fan from motor shaft.
NOTE: Measure distance from the fan blade to rear wall assembly before removal to aid in reassembly.
F. Remove four screws from motor support assembly.
G. Remove motor mount clamp and remove motor from oven back.
H. Remove motor mount from motor.
I. Reassemble in reverse order and check system operation.
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CAPACITOR – REPLACEMENT
A. Shut off power at main breaker.
B. Remove rear control box cover.
C. Discharge capacitor.
D. Remove capacitor.
E. Reassemble in reverse order and check system operation.
ON/OFF SWITCH – REPLACEMENT
A. Shut off power at main breaker.
B. Remove conveyor and front control box cover.
C. Depress spring clips on sides of switch and push out.
D. Remove wires from switch and mark for reassembly.
E. Reassemble in reverse order and check system operation.
NOTE: Make sure switch housing is fully seated in control box housing.
FUSE HOLDER – REPLACEMENT
A. Shut off power at main breaker.
B. Remove rear control box cover.
C. Remove wires from fuse holder and mark for reassembly.
D. Remove mounting screws or mounting nut on fuse holder and remove fuse holder.
E. Reassemble in reverse order and check system operation.
COOLING FAN, CONTROL BOX – REPLACEMENT
A. Shut off power at main breaker.
B. Remove appropriate control box cover and conveyor if necessary.
C. Remove four mounting screws from fan frame.
D. Disconnect power cord and remove fan.
E. Reassemble in reverse order and check system operation. Check for air flow.
THERMOSTAT, COOLING FAN, REPLACEMENT
A. Shut off power at main breaker.
B. Remove conveyor and front control box cover.
C. Remove wires and mark for reassembly.
D. Remove two mounting screws and remove thermostat.
E. Reassemble in reverse order and check system operation.
BURNER BLOWER MOTOR – REPLACEMENT
A. Shut off power at main breaker.
B. Remove rear control box cover.
C. Unplug motor connector.
D. Remove three mounting screws from blower tube at burner housing.
E. Remove air shutter assembly from old motor for assembly on new motor.
F. Reassemble in reverse order and check system operation.
NOTE: Check air shutter at approximately ½ open and adjust to get a blue flame with an occasional
tip of yellow under high flame. A view port in the burner assembly should be used to observe flame.
HI-LIMIT THERMOSTAT, OVEN CAVITY – REPLACEMENT
A. Shut off power at main breaker.
B. Remove conveyor and bottom finger assembly. Remove rear control box cover.
C. Remove capillary bulb from bracket in oven chamber and pull capillary tube through tube into
control box.
D. Remove all wires and mark for reassembly.
E. Remove mounting nut and remove thermostat.
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F. Reassemble in reverse order and check system operation. Be sure capillary tube is securely in
the mount.
NOTE: Push reset button on new thermostat.
TRANSFORMER, BURNER – REPLACEMENT
A. Shut off power at main breaker.
B. Remove conveyor and front control box cover.
C. Remove all wires from transformer and mark for reassembly.
D. Remove two mounting screws from transformer base and remove transformer.
E. Reassemble in reverse order and check system operation.
OVEN CONTROL – REPLACEMENT
A. Shut off power at main breaker.
B. Remove conveyor and front control box cover.
C. Remove all wiring connections and mark for reassembly.
D. Remove oven control by pulling control from the mounting pins. Remove control from oven.
E. Before installing new oven control, set voltage jumper (located at the bottom center of the oven
control) to the proper voltage (120V/240V) position. Set frequency jumper to the proper
frequency (50Hz/60Hz). Install the four pushbutton extensions (included with the oven control)
by pushing the extensions onto the four set buttons on control.
F. Reassemble in reverse order and check system operation.
G. Set the oven control for the proper operating mode. The 1100 series ovens use a single
temperature control system. The oven control must be set to the proper operating mode. Set the
control as follows: With the oven power switch “off”, depress the “time” and “up” buttons and turn
the oven “on”. Control will indicate ”Imp I or Imp II” Release the buttons, The control will indicate
“Temp to store”. Press the “up” or “down” button until “Imp II” appears on the display. Press the
“temp” button. The control is now set for single burner operation.
TRANSFORMER – CONTROL – REPLACEMENT
See “TRANSFORMER –BURNER - REPLACEMENT
THERMOCOUPLE – REPLACEMENT
A. Shut off power at main breaker.
B. Remove conveyor and bottom finger assembly.
C. Remove front control box cover.
D. Remove thermocouple from bracket in oven chamber and pull thermocouple through tube into
control box.
E. Remove two thermocouple wires from temperature control. Note wire color and location for
reassembly
F. Reassemble in reverse order and check system operation
THERMOCOUPLE MEASUREMENT
TEMPERATURE (°F) D.C. MILLIVOLTS
200°
250°
300°
350°
400°
450°
500°
550°
600°
2.8
4.0
5.1
6.0
7.1
8.2
9.3
10.4
11.5
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BURNER CONTROL – REPLACEMENT
A. Shut off power at main breaker.
B. Remove conveyor and front control box cover.
C. Remove wires from control and mark for reassembly.
D. Remove mounting screws from control and remove burner control.
E. Reassemble in reverse order and check system operation.
GAS VALVE – REPLACEMENT
A. Shut off power at main breaker.
B. Shut off gas supply to the oven and disconnect the flexible gas line to oven.
C. Remove rear control box cover.
D. Remove the manual gas shut-off valve.
E. Remove screws from the bulkhead plate on inlet gas pipe and remove inlet gas pipe.
F. Remove pilot tube and wiring from gas valve, Mark all wiring for reassembly.
G. Disconnect pipe union in gas line and remove gas valve and piping assembly.
H. Remove piping from gas valve.
I. Reassemble in reverse order and check system operation.
J. Check all gas line fitting for leaks.
K. Adjust the gas manifold pressure on the gas valve. Refer to the specification plate on the oven
for proper rating.
TEMPERATURE REGULATION VALVE – REPLACEMENT
A. Shut off power at main breaker.
B. Shut off gas supply to the oven and disconnect the flexible gas line to oven.
C. Remove rear control box cover.
D. Remove bypass tube from burner manifold.
E. Remove wiring from valve and mark for reassembly.
F. Remove four mounting nuts from burner manifold and disconnect pipe union.
G. Remove temperature regulation valve and piping from oven.
HOT SURFACE IGNITER – REPLACEMENT
A. Shut off power at main breaker.
B. Shut off gas supply to the oven and disconnect the flexible gas line to oven.
C. Remove conveyor and control box covers.
D. Remove temperature regulation valve. See “TEMPERATURE REGULATION VALVE”.
E. Disconnect wires from burner control.
F. Remove three mounting screws and remove burner venturi.
G. Remove mounting nut and remove hot surface igniter assembly.
H. Reassemble in reverse order and check system operation.
I. Check all gas line fittings for leaks.
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BYPASS ORIFICE – REPLACEMENT
A. Shut off power at main breaker.
B. Shut off gas supply to the oven and disconnect the flexible gas line to oven.
C. Remove rear control box cover.
D. Disconnect bypass tube from gas valve.
E. Remove bypass orifice from gas valve.
F. Reassemble in reverse order and check system operation.
G. Check all gas line fittings for leaks.
MAIN BURNER ORIFICE – REPLACEMENT
A. Shut off power at main breaker.
B. Shut off gas supply to the oven and disconnect the flexible gas line to oven.
C. Remove rear control box cover.
D. Remove burner manifold. See “TEMPERATURE REGULATION VALVE”.
E. Remove main burner orifice from burner manifold.
F. Reassemble in reverse order and check system operation.
G. Check all gas line fittings for leaks.
REVERSING SWITCH – REPLACEMENT
A. Shut off power at main breaker.
B. Remove rear control box cover.
C. Remove wires from reversing switch and mark for reassembly.
D. Remove mounting nut and remove switch.
E. Reassemble in reverse order and check system operation.
CONVEYOR DRIVE MOTOR – REPLACEMENT
A. Shut off power at main breaker.
B. Remove conveyor and both control box covers.
C. Disconnect all wiring from motor and mark for reassembly.
D. Remove coupling from motor drive shaft.
E. Remove four screws and remove conveyor motor and mounting bracket.
F. Remove mounting bracket from conveyor motor.
G. Reassemble in reverse order and check system operation.
REVERSING CONVEYOR DIRECTION
A. Shut off power at oven switch.
B. Set conveyor reversing switch in the other position.
C. Turn oven “on” and check for proper operation.
CAPACITOR, CONVEYOR DRIVE MOTOR – REPLACEMENT
A. Shut off power at main breaker.
B. Remove rear control box cover.
C. Discharge capacitor before removing wires. Mark wires for reassembly.
D. Remove mounting screw and remove capacitor.
E. Reassemble in reverse order and check system operation.
AIR PRESSURE SWITCH – REPLACEMENT
A. Shut off power at main breaker.
B. Remove conveyor and front control box cover.
C. Disconnect wiring from air pressure switch and mark for reassembly.
D. Disconnect air tube from air pressure switch.
E. Remove two mounting screws and remove air pressure switch.
F. Reassemble in reverse order and check system operation. Be sure to calibrate new air pressure
switch. For proper calibration, see below.
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G. Turn adjusting screw on air pressure switch fully counter clockwise.
H. Turn oven “on”.
I. Turn adjusting screw on air pressure switch clockwise until heat shuts off.
J. Turn adjusting screw on air pressure switch counter clockwise ¼ turn.
K. Reassemble control panel top and front cover.
BEARING, CONVEYOR – REPLACEMENT
A. Remove conveyor from oven and place on a flat work surface.
B. Remove connecting links from conveyor belt. See Installation Operations manual for proper
procedure. Remove conveyor belt from conveyor.
C. Move drive shaft or idler shaft toward end of conveyor, and shaft with bearing will now slip out of
conveyor frame.
D. Remove bearing from conveyor shaft.
E. Reassemble in reverse order and check system operation.
MERCURY CONTACTOR – REPLACEMENT
A. Shut off power at main breaker.
B. Remove rear control box cover.
C. Disconnect all wires and mark for reassembly.
D. Remove screws from mounting bracket and remove contactor.
E. Reassemble in reverse order and check system operation.
HEATING ELEMENT – REPLACEMENT
A. Shut off power at main breaker.
B. Remove back cover.
C. Disconnect heating element wires and mark for reassembly.
D. Disconnect motor wiring and mark for reassembly.
E. Remove oven back from oven.
F. Remove fan shroud.
G. Heating element may now be unbolted and removed.
H. Check new heating element for proper voltage. Reassemble in reverse order and check for
proper operation.
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GENERAL VIEW
IMPINGER II ADVANTAGE
MODEL
1116-080-A, 1116-080-A1, 1117-080-A, 1117-080-A1,
1130-080-A, 1130-080-A1, 1131-080-A, 1131-080-A1,
1132-080-A, 1132-080-A1, 1133-080-A, 1132-080-A1,
1130-08H-A, 1131-08H-A, 1132-08H-A, 1133-08H-A,
1161-080-A, 1162-080-A
LETTER
PART NUMBER
370412
DESCRIPTION
Cross support
Stand side
Caster, 4” w/threaded stem
Adjustable leg
Caster, 4” w/mounting plate
Oven door, See page 38/39
Bottom finger housing
A
B
C
D
E
F
G
H
I
370416
369231
369232
369390
370010
369502
369504
370487
369503
370486
370415
369659
370679
369225
369211
Bottom finger cover
Top finger housing (model ending with –080-A)
Top finger housing (model ending with –080-A1)
Top finger cover (model ending with –080-A)
Top finger cover (model ending with –080-A1)
Oven top
Conveyor hole cover (S/N 2052462 & Below)
Conveyor hole cover (S/N 2052463 & Above)
Baffle
J
K
L
M
N
Thumb screw
Columnating plate, see Installation & Operations
manual
Columnating plate, see Installation & Operations
manual
O
P
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GENERAL VIEW
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CONTROL BOX, FRONT
MODEL
1116-080-A, 1116-080-A1,
1117-080-A, 1117-080-A1
LETTER
PART NUMBER
369805
DESCRIPTION
Switch, on/off
Facia, pushbutton
Control board
A
B
C
370408
370417
370409
369531
369507
369124
Display (digital only)
Transformer, 24VAC
Thermostat, cooling fan
Cooling fan
D
E
F
G
H
I
369532
370410
369680
Ignition control
Stand off plate
Front cover assy.
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CONTROL BOX, FRONT VIEW
MODEL
1116-080-A, 1116-080-A1,
1117-080-A, 1117-080-A1
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CONTROL BOX, FRONT
MODEL
1130-080-A, 1130-080-A1, 1131-080-A, 1131-080-A1,
1132-080-A, 1132-080-A1, 1133-080-A, 1133-080-A1,
1130-08H-A, 1131-08H-A, 1132-08H-A, 1133-08H-A,
1161-080-A, 1162-080-A
LETTER
PART NUMBER
369680
369508
369432
370408
370417
370409
369427
369507
369124
369378
369523
369025
370410
DESCRIPTION
A
B
C
D
E
Front cover assy.
Timer, 20 minute
On/off switch
Facia, push button
Control board
Display
F
G
H
Transformer, control
Thermostat, cooling fan
Cooling fan
Cooling Fan 1132 – 1133-08H-A models only
Relay, oven start
Air pressure switch
Stand-off plate assy.
I
J
K
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CONTROL BOX, FRONT VIEW
MODEL
1130-080-A, 1130-080-A1, 1131-080-A, 1131-080-A1,
1132-080-A, 1132-080-A1, 1133-080-A, 1133-080-A1,
1130-08H-A, 1131-08H-A, 1132-08H-A, 1133-08H-A,
1161-080-A, 1162-080-A
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CONTROL BOX, REAR
MODEL
1116-080-A, 1116-080-A1,
1117-080-A, 1117-080-A1
LETTER
PART NUMBER
DESCRIPTION
A
B
369192
370378
370675
369901
369568
369938
369566
369524
369552
369398
370359
369366
369401
369556
369557
369263
357067
370376
370681
369129
370362
369682
369166
369331
369124
370364
369537
Capacitor
Conveyor motor assy. (S/N 2052462 & Below)
Conveyor motor assy. (S/N 2052463 & Above)
Burner manifold
Burner venturi, Nat. gas
Burner venturi, L.P. gas
Orifice, main, Nat. gas
Orifice, main, L.P. gas
Hot surface igniter
C
D
E
F
G
H
I
J
K
Valve, temperature regulation
Reversing switch, conveyor
Burner blower motor
Air shutter assy.
Orifice, bypass, Nat. gas
Orifice, bypass, L.P. gas
Gas valve, Nat./L.P.
Thermostat, oven cavity hi-limit
Capacitor, conveyor motor (S/N 2052462 & Below)
Capacitor, conveyor motor (S/N 2052463 & Above)
Fuse holder
Thermocouple, type ”K”
Control box cover, rear
Fuse, 10A.
L
M
N
O
P
Q
R
S
T
Finger guard
Cooling Fan
Ground lug
Power cord
U
V
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CONTROL BOX, REAR VIEW
MODEL
1116-080-A, 1116-080-A1,
1117-080-A, 1117-080-A1
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CONTROL BOX REAR
MODEL
1130-080-A, 1130-080-A1, 1131-080-A, 1131-080-A1,
1132-080-A, 1132-080-A1, 1133-080-A, 1133-080-A1,
1130-08H-A, 1131-08H-A, 1132-08H-A, 1133-08H-A,
1161-080-A, 1162-080-A
LETTER
PART NUMBER
369192
369200
369124
369378
370362
369185
369187
369186
369188
370067
369479
370485
369682
357067
370359
370302
369129
370383
370382
370384
370676
369331
369166
370364
DESCRIPTION
Capacitor
Relay, main fan
Cooling Fan
Cooling Fan 1132 – 1133-08H-A models
Thermocouple, Type “K”
Terminal block section 1 Phase (2 required)
Terminal block section (3 required)
Terminal block end 1 Phase
Terminal block end 3 Phase
Mercury contactor 2 pole (1 Phase)
Mercury contactor 3 pole (3 Phase)
Mercury contactor 3 pole (3 Phase) – “08H-A” model only
Control box cover, rear
A
B
C
D
E
F
G
H
I
J
K
L
Thermostat, oven cavity hi-limit
Reversing switch, conveyor
Receptacle
Fuse holder
Capacitor, conveyor motor (S/N 2052462 & Below)
Capacitor, conveyor motor (S/N 2052463 & Above)
Conveyor motor (S/N 2052462 & Below)
Conveyor motor (S/N 2052463 & Above)
Finger guard
M
N
O
P
Fuse, 10A.
Ground lug
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CONTROL BOX, REAR VIEW
MODEL
1130-080-A, 1130-080-A1, 1131-080-A, 1131-080-A1,
1132-080-A, 1132-080-A1, 1133-080-A, 1133-080-A1,
1130-08H-A, 1131-08H-A, 1132-08H-A, 1133-08H-A,
1161-080-A, 1162-080-A
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OVEN BACK ASSEMBLY
LETTER
PART NUMBER DESCRIPTION
A
B
C
D
369182
369899
369655
Fan
Fan shroud
Stand off
Heating element
369183
369184
370648
370645
370690**
370689**
208 Volt
240 Volt
208 Volt – Models 1130-08H-A & 1132-08H-A (S/N 10062053640 & below)
240 Volt – Models 1131-08H-A & 1133-08H-A (S/N 10062053640 & below)
208 Volt – Models 1130-08H-A & 1132-08H-A (S/N 10062053641 & above)
240 Volt – Models 1131-08H-A & 1133-08H-A (S/N 10062053641 & above)
Not Shown
Oven Back Assembly
208 Volt – Models 1130-08H-A & 1132-08H-A
(to be used when replacing elements from S/N 10062053640 & below)
240 Volt – Models 1131-08H-A & 1133-08H-A
(to be used when replacing elements from S/N 10062053640 & below)
370687**
370688**
E
Rear wall
369976
369549
369581
Gas ovens
Electric ovens
Motor mount
F
G
Motor
369539
369181
369695
369033
369681
369979
369227
369541
Gas ovens (120VAC)
Electric ovens (208/240VAC)
Bracket, motor
Clamp, motor
Cover, back
Bracket, hi-limit
Spring
Bracket, thermocouple
H
I
J
K
L
M
** High wattage elements for models 1130-08H-A, 1131-08H-A, 1132-08H-A, and 1133-08H-A have been
redesigned – beginning with serial number 10062053641. As a result, service calls related to element
replacements for units with S/N 10062053640 & below will require the installation of a redesigned oven back
assembly. See Service Bulletin 2006-25-A for additional information concerning the redesigned elements.
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OVEN BACK ASSEMBLY VIEW
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CONVEYOR / DOOR
LETTER
A
PART NUMBER
DESCRIPTION
369190
370671
369512
369269
370116
Coupler (S/N 2052462 & below)
Coupler (S/N 2052463 & above)
Coupling center (S/N 2052462 & below)
Ball plunger (S/N 2052462 & below)
Set screw (S/N 2052462 & below)
Crumb pan, right S/N 2045452 & below
Crumb pan, right and left S/N 2045453 & above
Crumb pan, left S/N 2045452 & below
Conveyor frame assembly
Pan stop
Conveyor bearing
Idler shaft
Sprocket (includes set screw), Regular Conveyor
Set screw
Sprocket (includes set screw), Heavy-Duty Conveyor
Drive shaft (S/N 2052462 & below)
Drive shaft (S/N 2052463 & above)
Hinge
Door assembly
Impinger nameplate
Door latch & catch
Door assembly with window
Window frame, top
Glass, access window
Window frame, bottom
Retainer, window
Splice clip, conveyor belt
Conveyor belt (complete), Regular Conveyor
Conveyor belt (1-Foot section), Regular Conveyor
Conveyor Belt (complete), Heavy-Duty Conveyor
Conveyor Belt (1-Foot Section), Heavy-Duty Conveyor
Roll Pin
B
C
D
E
369223
F
G
H
J
369224
369666
369226
369516
369514
369515
369978
370509
369238
370678
369513
370413
370016
369501
370414
369927
369925
369926
369929
369165
369194
369394
370155
370157
369471
K
L
M
N
O
P
Q
R
S
T
U
W
X
Y
Not Shown
38
Impinger II – Advantage Digital Express Service Manual - Domestic
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CONVEYOR / DOOR VIEW
Impinger II – Advantage Digital Express Service Manual - Domestic
39
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40
Impinger II – Advantage Digital Express Service Manual - Domestic
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