Lincoln Convection Oven II Advantage Series 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: (800) 374-3004  
U.S. Fax: (888) 790-8193 • Int’l Fax: (260) 436-0735  
Technical Service Hot Line  
(800) 678-9511  
1100AdvSvc  
REV 3/20/08  
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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  
COOL DOWN  
When the temperature in the control box reaches 120°F ± 3° (48.9°C ± 1.7°C),  
the  
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  
CONVEYOR DRIVE  
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.  
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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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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SCHEMATIC 1116-000-A, 1117-000-A  
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SCHEMATIC 1130-000-A / 1131-000-A  
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SCHEMATIC 1132-000-A / 1133-000-A  
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TROUBLESHOOTING GUIDE / GAS OVENS  
MODEL 1116-000-A  
MODEL 1117-000-A  
NATURAL GAS  
LP GAS  
120 VAC  
120 VAC  
60 HZ  
60 HZ  
1 PHASE  
1 PHASE  
SYMPTOM  
Oven fan will not run  
POSSIBLE CAUSE  
EVALUATION  
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  
Fuse Holder  
Check, replace if necessary.  
Check, replace if necessary.  
Hi Limit Thermostat-Control  
Box  
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.  
Main Fan Switch  
Main Fan Motor  
Capacitor  
Check continuity between switch terminals.  
Check for opens, shorts, or grounds. WITH POWER  
OFF turn fan blade to check for locked rotor.  
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  
Cooling Fan  
Check continuity between switch terminals  
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.  
Check circuit breakers,  
reset if required. Call the power company if needed.  
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.  
No automatic control  
box cooling  
Incoming Power Supply  
Cooling Fan Thermostat  
Cooling Fan  
Gas Supply  
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.  
Check for adequate gas supply and closed manual  
gas shut offs. Also, check flexible gas line  
connection.  
Oven will not heat  
Main Fan  
High Limit Oven Cavity  
Thermostat  
If not operating, refer to "Oven fan will not run".  
Terminals are normally closed. If  
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  
of Main Fan Motor  
Check for 120 VAC at lead #9  
(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.  
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Burner Blower Motor  
Transformer, Burner  
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.  
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.  
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.  
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.  
Hot Surface Ignitor  
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  
Ignition Control  
If there is sufficient micro-amp current, but the flame  
will not stay lit, check for proper polarity of the 120  
VAC power supply.  
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,  
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  
Potentiometer  
Disconnect the potentiometer leads  
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  
Valve  
If 120 VAC is present on the  
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  
Fuseholder  
Fan Switch  
Check and/or replace.  
Check and/or replace.  
See procedure for checking on Page 10.  
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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  
Conveyor Gear Motor  
Conveyor  
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:  
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.  
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.  
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.  
Hall Effect Sensor  
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Temp. display inoperative  
Display Transformer  
Measure the transformer primary for a nominal 120  
VAC input, if voltage is not present, trace wiring back  
to the oven power source. Measure the secondary  
output, which will normally be 12-15 VAC. Voltage  
across terminals 1 and 3 on the time/temp. display  
should read 12-15 VAC. Terminals 1-2 and 2-3  
should be 1/2 the voltage reading to 1-3. If the  
above secondary readings are not achieved, replace  
transformer.  
Temp. Display  
Thermocouple  
If proper voltage is present at terminals 1, 2, and 3  
on temperature display, but the display is not lighted,  
recheck all connections for tightness. If temperature  
display is still not operating, replace the temperature  
display.  
Place the thermocouple of a pyrometer into the  
center of the top finger. Be sure the tip of the  
thermocouple is not touching metal, it must sense air  
temperature only. The pyrometer will indicate oven  
temperature. Measure DC millivolts of thermocouple  
at the temperature display. See thermocouple chart  
on page 19 for proper readings. Replace  
Temp. Display inaccurate,  
erratic or inoperative  
thermocouple if proper readings are not achieved. If  
readings are correct on the thermocouple, replace  
temperature display.  
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TROUBLESHOOTING GUIDE / ELECTRIC OVENS  
MODEL 1130-000-A  
MODEL 1131-000-A  
MODEL 1132-000-A  
MODEL 1133-000-A  
208 VAC  
240 VAC  
208 VAC  
240 VAC  
SINGLE PHASE  
SINGLE PHASE  
THREE PHASE  
THREE PHASE  
60 HZ  
60 HZ  
60 HZ  
60 HZ  
REFER TO PROPER SCHEMATIC FOR IDENTIFIED COMPONENTS  
SYMPTOM  
POSSIBLE CAUSE  
EVALUATION  
Oven fan will not run  
Incoming Power Supply  
Check circuit breakers. Rest if required. Call  
power company in needed.  
Fuses, 10 Amp, Fan and  
Controls  
Check, replace if necessary.  
Fuseholder  
Check, replace if necessary.  
Control Box High Limit  
Thermostat  
Terminals are normally closed, but open at 140°F ±  
5°F (60°C ± 2.8°C). Check for over heating and  
reset thermostat. Test for proper operation. If it will  
not reset and hold, then replace.  
Switch, Main Fan  
Main Fan Motor  
Check for continuity between switch terminals.  
Check for opens, shorts, or grounds. WITH  
POWER OFF: Turn fan blade to check for locked  
rotor.  
Capacitor  
Check for opens, shorts, or grounds.  
No control box cooling  
Check for main fan operation. If not operating, refer  
to "Oven Fan Will Not Run".  
Cooling Fan Motor  
208/240 VAC should be present at the fan motor. If  
voltage is present, check for opens or shorts.  
WITH POWER OFF: Check for locked rotor of the  
fan motor.  
No automatic control  
box cooling  
Incoming Power Supply  
Thermostat, Cooling Fan  
Check circuit breakers. Reset if required. Call  
power company if needed.  
This normally open thermostat should close when  
the temperature in the control box reaches 120°F  
(48.9°C). If thermostat does to close, replace.  
208/240 VAC should be present at the fan motor. If  
voltage is present, check for opens or short. WITH  
POWER OFF: Check for locked rotor of the fan  
motor.  
Cooling Fan Motor  
Control box cooling fan  
continues to run  
Oven will not heat  
Thermostat, Cooling Fan  
Main Fan Motor  
This normally open thermostat should close at  
120°F (48.9°C) and reopen at 100°F (37.8°C).  
Check for main fan operation. If it is not operating,  
refer to "Oven fan will not run".  
Air Pressure Switch  
This normally open switch should close when the  
main fan is activated. Adjust if necessary (Refer to  
page 23). Replace if defective.  
Hi-Limit Thermostat  
Cavity  
Oven  
Terminals are normally closed. If open, reset and  
test oven for proper operation. 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.  
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Temperature Control  
Thermocouple Probe  
Check for supply voltage at temperature control. If  
no voltage is present, trace wiring back to hi-limit  
thermostat. Turn the temperature adjustment knob  
to maximum temperature position and check for  
208/240 VAC at the load terminals 7 and 8. If  
208/240 VAC is present and unit is not heating,  
refer to "Mercury Contactor" for next check. If  
208/240 VAC is not present, proceed.  
WITH POWER ON AND THERMOCOUPLE  
LEADS ATTACHED TO THE TEMPERATURE  
CONTROL BOARD: measure D.C. millivolt output  
of these leads. Refer to thermocouple chart in  
Section D for proper readings. If these readings  
are not achieved, replace thermocouple.  
Temperature Control  
Potentiometer  
Disconnect the potentiometer leads 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.  
Mercury Contactor  
Heater Elements  
Check for supply voltage to the contactor coil. If  
voltage is present and the contactor will not  
activate, replace the contactor. Also, check each  
contactor for proper high voltage input and output.  
Check the amp draw on each hot leg for proper  
load. Check the specifications plate for rating  
information. If the amp draw is low or high, 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 an accurate digital VOM.  
The element resistance should be as follows:  
208V - 27 ohms approximately  
240V - 36 ohms approximately  
Oven heats with switch off  
Intermittent Heating  
Mercury Contactor  
The mercury contactor has probably malfunctioned  
in the closed position. If there is no voltage to the  
operating coil, but there is high voltage at the  
contactor out put, replace the mercury contactor.  
The main fan motor is equipped with internal  
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. 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.  
Thermal/Overload of motor  
Conveyor will not run  
Voltage Supply  
Check incoming voltage supply at line 1 to neutral.  
There should be a voltage reading of 208/240 VAC.  
If not present, check breakers.  
10 Amp Fuse  
Fuseholder  
Fan Switch  
Check and/or replace.  
Check and/or replace.  
See procedure for checking on page 8.  
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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 reading 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 208/240 VAC input to the control board at  
terminals L1 and L2. If not present, check wiring  
back to the oven fan switch. If voltage 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 voltage is present at  
terminals L1 and L2, and DC voltage is present at  
A+ and A-, but 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  
208/240 VAC at board terminals L1 and L2.  
Place the test meter probes on terminals A+ and A-.  
(With speed potentiometer set to maximum speed  
(Approximately 2 minutes), 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.  
Motor Control Board  
DC Gearmotor  
Magnet  
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 14 under "possible  
cause" listing "conveyor gear motor."  
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.  
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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 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.  
Temp. Display inoperative  
Display Transformer  
Measure the transformer primary for input, if  
voltage is not present, trace wiring back to the oven  
power source. Measure the secondary output,  
which will normally by 12-15 VAC. Voltage across  
terminals 1 and 3 on the time/temp. display should  
read 12-15 VAC. Terminals 1-2 and 2-3 should be  
1/2 the voltage reading from 1-3. if the above  
secondary readings are not achieved, replace  
transformer  
Temperature Display  
Thermocouple  
If proper voltage is present at terminals 1, 2, and 3  
on temperature display, but the display is not  
lighted, recheck all connections for tightness.  
Temperature display is still not operating, replace  
the temperature display.  
Place the thermocouple of a pyrometer into the  
center of the top finger. Be sure the tip of the  
thermocouple is not touching metal, it must sense  
air temperature only. The pyrometer will indicate  
oven temperature.  
Temp. Display inaccurate,  
erratic or inoperative  
Measure DC millivolts of thermocouple at the  
temperature display. See thermocouple chart on  
page 19 for proper readings. Replace  
thermocouple if proper readings are not achieved.  
If readings are correct on the thermocouple, replace  
temperature display.  
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REMOVAL, INSTALLATION, AND ADJUSTMENT  
IMPINGER II ADVANTAGE  
CAUTION!  
BEFORE REMOVING OR INSTALLING ANY COMPONENT IN THE IMPINGER OVEN, BE SURE TO DISCONNECT  
ELECTRICAL POWER AND GAS SUPPLY.  
MOTOR, MAIN FAN  
1.  
2.  
3.  
4.  
5.  
Shut off power at main breaker.  
Remove motor cover from back of oven.  
Remove wires for motor and mark for reassembly.  
Remove hex head bolts from the oven back and slide back straight out of the oven.  
Loosen 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.  
6.  
Remove the bolts from the motor mount and remove motor clamp. Slide the motor assembly out of the  
oven back.  
7.  
8.  
Remove motor by removing the four (4) mounting nuts and washers.  
Reassemble in reverse order. When motor mount assembly is set on the oven back, align motor shaft in  
the center of the hole. Set fan assembly on the motor shaft.  
NOTE: It is recommended that an anti-seize compound be brushed on to the bolts around the back and  
motor mount bracket before assembly.  
FAN, MAIN  
1.  
2.  
3.  
Shut off power at main breaker.  
Remove back assembly. (See motor, main fan)  
Reinstall and locate fan so that the bottom of the fan spider is 1 1/2" from the top of the oven back cone.  
(See drawing)  
FAN SPIDER  
NOTE: MEASUREMENT MUST BE  
MADE FROM CONE TO FAN SPIDER  
FAN HUB  
1 1/2 INCH  
CONE  
CAPACITOR, MOTOR  
1.  
2.  
3.  
4.  
Shut off power at main breaker.  
Remove control box cover and front panel.  
Discharge capacitor.  
Remove and replace.  
ON/OFF SWITCH - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
Shut off power at main breaker.  
Remove control box cover.  
Remove front panel.  
Depress spring clips on side of switch and push out.  
Remove wires from back of switch, note wire number and location.  
Reassemble in reverse order and check system operation.  
NOTE: Make sure switch housing is fully seated in control box housing.  
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FUSE HOLDER - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
Shut off power at main breaker.  
Remove control box cover and front panel.  
Remove wires from fuse holder and mark for reassembly.  
Remove mounting screws or mounting nut on fuse holder. Push fuse holder out.  
Reassemble in reverse order.  
THERMOSTAT, CONTROL BOX HI-LIMIT - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
Shut off power at main breaker.  
Remove control box cover and front panel.  
Remove wires from thermostat and mark for reassembly.  
Remove mounting screws and nuts and remove thermostat.  
Reassemble in reverse order.  
NOTE: Push reset button on new thermostat.  
COOLING FAN, CONTROL BOX  
1.  
2.  
3.  
4.  
5.  
Shut off power at main breaker.  
Remove control panel top and front cover.  
Remove four (4) screws from the fan frame.  
Disconnect cord and plug and remove fan.  
Reassemble in reverse order.  
THERMOSTAT, COOLING FAN  
1.  
2.  
3.  
4.  
5.  
Shut off power at main breaker.  
Remove control panel top and front cover.  
Remove lead wires and mark for reassembly.  
Remove two (2) screws and remove thermostat.  
Reassemble in reverse order.  
BURNER BLOWER MOTOR - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
Shut off power at main breaker.  
Remove control panel top and front cover.  
Unplug motor connector.  
Remove three (3) screws from blower tube at burner housing.  
Remove air shutter assembly from old motor for installation on new motor assembly.  
Reassemble in reverse order and check system operation.  
NOTE: Check air shutter at approximately 1/2 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.  
HIGH LIMIT THERMOSTAT - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
Remove control panel top and front cover.  
Remove conveyor and bottom finger assembly.  
Remove capillary bulb from bracket in oven chamber and pull through tube into control box.  
Remove two (2) wires from thermostat, note wire numbers and location for reinstallation.  
Remove mounting nut and remove thermostat.  
Reassemble in reverse order making sure capillary tube is placed securely in the bracket.  
NOTE: Depress reset button to insure thermostat is set for operation.  
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BURNER TRANSFORMER - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
Shut power off at main breaker.  
Remove control panel top and front cover.  
Remove two (2) wires on primary side, note color and location.  
Remove two (2) wires on secondary side, note color and location.  
Remove two (2) screws from transformer base and replace assembly.  
Reinstall in reverse order and check system operation.  
THERMOCOUPLE - REPLACEMENT  
1.  
2.  
3.  
Shut off power at main breaker.  
Remove control panel top and front cover.  
Slide thermocouple out of oven chamber.  
NOTE: Remove conveyor and bottom finger assembly to aid in removal and installation of thermocouple.  
4.  
Remove two (2) wires from temperature control. Make note of wire numbers or color and location for  
reinstallation.  
5.  
Reassemble in reverse order making sure the metal end on the thermocouple is securely held in the wire  
form in the oven chamber.  
THERMOCOUPLE MEASUREMENT CHART:  
INFORMATION:  
When two wires composed of dissimilar metals are joined together and one of the ends is heated, a continuous current  
flow is generated. We use an iron constant (Type J) thermocouple. The iron wire increases the number of dissimilar  
junctions in the circuit.  
It is possible to check a thermocouple with a properly calibrated D.C. millivolt meter. At 32°F, the millivolt reading should  
be 0.00. This can be checked by inserting the thermocouple into an ice bath.  
The millivolt reading at 72°F should be 1.134.  
When using the following chart, the temperature at the terminal connections must be noted. This temperature is called  
the Junction Temperature.  
The following chart lists the thermocouple millivolt readings from 200°F to 600°F.  
EXPLANATION: The junction temperature is the ambient air temperature where the thermocouple fastens to the  
electronic temperature control.  
O
V
E
N
T
E
M
P
200°F 250°F 300°F 325°F 350°F 400°F 425°F 450°F 500°F 550°F 600°F  
90°F  
88°F  
86°F  
84°F  
82°F  
80°F  
78°F  
76°F  
75°F  
74°F  
72°F  
70°F  
68°F  
66°F  
64°F  
62°F  
60°F  
3.26  
3.32  
3.37  
3.43  
3.49  
3.55  
3.60  
3.66  
3.69  
3.72  
3.78  
3.83  
3.89  
3.95  
4.01  
4.06  
4.12  
4.77  
4.83  
4.88  
4.94  
5.00  
5.06  
5.11  
5.17  
5.20  
5.23  
5.29  
5.34  
5.40  
5.46  
5.52  
5.57  
5.63  
6.30  
6.36  
6.41  
6.47  
6.53  
6.59  
6.64  
6.70  
6.73  
6.76  
6.82  
6.87  
6.93  
6.99  
7.05  
7.10  
7.16  
7.06  
7.12  
7.17  
7.23  
7.29  
7.35  
7.40  
7.46  
7.49  
7.52  
7.58  
7.63  
7.69  
7.75  
7.81  
7.86  
7.92  
7.83  
7.89  
7.94  
8.00  
8.06  
8.12  
8.17  
8.23  
5.26  
8.29  
8.35  
8.40  
8.46  
8.52  
8.58  
8.63  
8.69  
9.37 10.14 10.91 12.46 14.00 15.53  
9.43 10.20 10.97 12.51 14.05 15.59  
9.49 10.26 11.03 12.57 14.11 15.65  
9.54 10.31 11.09 12.63 14.19 15.71  
9.60 10.37 11.14 12.69 14.23 15.76  
9.66 10.43 11.20 12.74 14.28 15.82  
9.72 10.49 11.26 12.80 14.34 15.86  
9.77 10.55 11.32 12.86 14.40 15.94  
9.80 10.57 11.35 12.89 14.43 15.97  
9.83 10.60 11.37 12.92 14.46 15.99  
9.89 10.66 11.43 12.97 14.51 16.05  
9.95 10.72 11.49 13.03 14.57 16.11  
10.00 10.78 11.55 13.09 14.63 16.17  
10.06 10.83 11.61 13.15 14.69 16.23  
10.12 10.89 11.66 13.20 14.74 16.28  
10.18 10.95 11.72 13.26 14.80 16.34  
10.24 11.01 11.78 13.32 14.86 16.40  
J
U
N
C
T
I
O
N
T
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ELECTRONIC TEMPERATURE CONTROL BOARD - REPLACEMENT  
1.  
2.  
3.  
4.  
Remove control box cover.  
Disconnect wires and molded connector and mark for reinstallation.  
Depress nylon clips and remove circuit board from mounting bracket.  
Reassemble in reverse order and check operation.  
ELECTRONIC TEMPERATURE CONTROL BOARD - CALIBRATION  
1.  
2.  
Place the thermocouple of your test meter through a finger hole in the top center of the oven.  
With temperature dial fully counter clockwise, align dial red line over "CAL" mark on temperature scale  
and tighten dial knob.  
3.  
Turn temperature dial fully clockwise, adjust pot on temperature control to achieve 575°F on temperature  
meter.  
4.  
5.  
Set dial to 500°F. Adjust dial to match actual temperature.  
Seal adjustment pot with glyptol or nail polish.  
TEMPERATURE CONTROL POTENTIOMETER - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
Shut off power at main breaker.  
Remove control panel top and front cover.  
Loosen two (2) allen screws and remove knob by sliding off shaft.  
Remove mounting nut from potentiometer shaft and push out.  
Unplug wire connector from control board.  
Reassemble in reverse order and check system operation.  
HEAT LIGHT - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
Shut off power at main breaker.  
Remove control panel top and front panel.  
Remove two wires from burner light, note number and location.  
Grasp body of light assembly and slide sideways to remove.  
Reassemble in reverse order and check.  
BURNER CONTROL - HONEYWELL - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
Shut off power at main breaker.  
Remove control panel top and front cover.  
Remove wires from control, note wire numbers and location for reassembly.  
Remove screws from control and replace.  
Reassemble in reverse order and check system operation.  
GAS VALVE - REPLACEMENT  
1.  
Shut off power at main breaker.  
2.  
3.  
Shut off the gas supply in the main line to the oven.  
Disconnect the flexible gas hose.  
4.  
Remove the control panel top and front panel.  
5.  
6.  
7.  
Remove the manual gas shut off valve from piping.  
Remove screws from the bulkhead plate located on rear of oven at the gas pipe.  
Remove the section of gas pipe to gas valve.  
8.  
9.  
10.  
11.  
12.  
13.  
Disconnect the electrical leads from the solenoid valve. Disconnect bypass tube.  
Loosen the gas line union located near the burner and remove the gas valve and piping assembly.  
Finish removal of the gas piping from gas valve.  
Reassemble in reverse order.  
Check all gas fittings for leaks.  
Adjust the gas manifold pressure on the gas valve. "Refer to the specification plate on the oven for  
proper rating."  
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BYPASS ORIFICE  
1.  
2.  
3.  
4.  
5.  
Shut off power at main breaker.  
Shut off gas supply to oven.  
Remove control panel top and front cover.  
Remove pilot tube from bypass orifice and remove orifice.  
Reassemble in reverse order.  
TEMPERATURE REGULATION VALVE - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
7.  
8.  
9.  
Shut off power at main breaker.  
Shut off gas supply.  
Remove control panel top and front cover.  
Remove bypass tube from burner manifold.  
Disconnect wires from valve and mark wires for reassembly.  
Remove (4) nuts from burner manifold and loosen pipe union.  
Remove temperature control valve and piping.  
Remove piping from valve and reassemble in reverse order.  
Check all pipe fittings for leaks.  
HOT SURFACE IGNITOR - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
7.  
8.  
9.  
10.  
Shut off the power at main breaker.  
Shut off the gas supply in the main line to the oven.  
Remove control panel top and front cover.  
Remove Gearmotor, DC, Conveyor.  
Remove electrical plug from the burner cap.  
Remove "Temperature Regulation Valve."  
Remove 3 screws holding burner cap to burner tube.  
Pull out on burner cap removing cap and burner venturi.  
The hot surface ignitor is held in place on the burner venturi by one nut, loosen nut and remove ignitor.  
Replace in reverse order.  
NOTE: Care must be used when handling the hot surface ignitor as they are quite fragile and may be easily  
broken if dropped or bumped.  
MAIN BURNER ORIFICE - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
7.  
Shut off power at main breaker.  
Shut off gas supply.  
Remove control panel top and front cover.  
Remove burner manifold, see "Temperature Regulation Valve."  
Remove main burner orifice from burner manifold.  
Reassemble in reverse order.  
Check all pipe fittings for gas leaks.  
CONVEYOR CONTROL POTENTIOMETER - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
Shut off power at main breaker.  
Remove control panel top and front cover.  
Loosen two (2) allen screws and remove knob by sliding off shaft.  
Remove mounting nut from potentiometer shaft and push out.  
Unplug wire connector from conveyor control board.  
Reassemble in reverse order and check system operation.  
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CONVEYOR CONTROL BOARD - REPLACEMENT  
1.  
2.  
3.  
Shut off power at main breaker.  
Remove control panel top and front cover.  
Disconnect wiring (push on connectors) from control board, note proper location of connectors for  
reinstallation and exchange boards on the mounting bracket before reinstallation.  
Remove mounting screws from control assembly.  
4.  
5.  
Reassemble in reverse order and check system operation.  
NOTE: Be sure that jumper (on conveyor control) is set to the proper (120/240) position.  
CONVEYOR CONTROL BOARD - CALIBRATION  
1.  
2.  
Connect digital volt meter to the hall effect sensor. Black meter lead connected to black hall effect sensor  
lead, red meter lead to white hall effect sensor lead.  
Turn conveyor control knob fully counter clockwise. Loosen knob and align with calibration line and  
tighten knob.  
3.  
4.  
Set knob to one minute setting. Adjust "max" pot on conveyor control to 327.5 Hz.  
Set control knob to 30 minute setting, and adjust "min" pot on conveyor control to 10.9 Hz. Recheck at  
one minute and 30 minutes until proper readings are achieved. Seal pots with glyptol or nail polish.  
CIRCUIT BREAKER  
1.  
2.  
3.  
4.  
5.  
Shut off power at main breaker.  
Remove control panel top and front panel.  
Disconnect two (2) wires from circuit breaker.  
Remove knurled mounting nut and push out.  
Reassemble in reverse order.  
NOTE: Be sure to reset breaker before operating.  
CONVEYOR DRIVE MOTOR - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
7.  
8.  
Shut off power at main breaker.  
Remove conveyor.  
Remove control panel top and front cover.  
Disconnect wiring from motor and mark for reassembly.  
Remove coupling from motor drive shaft.  
Remove 4 screws and remove conveyor motor and mounting bracket.  
Remove mounting bracket from conveyor motor assembly.  
Reassemble in reverse order.  
REVERSING CONVEYOR DIRECTION  
1.  
2.  
3.  
4.  
Shut off power at main breaker.  
Remove control panel top.  
Remove cover from relay box.  
Reverse wires fastened to terminals A+ and A- on conveyor control board. (See schematic diagram for  
wire numbers.)  
5.  
Reassemble in reverse order.  
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HALL EFFECT SENSOR - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
7.  
8.  
9.  
Shut off power at main breaker.  
Remove control panel top and front cover.  
Remove conveyor motor assembly.  
Remove wire connector from hall effect sensor board.  
Remove two (2) screws from conveyor drive motor.  
Remove sensor board from mounting bracket.  
Reassemble in reverse order.  
Reinstall plug on hall effect sensor board and check conveyor system operation.  
Replace control box covers and check system operation.  
TEMPERATURE DISPLAY TRANSFORMER - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
Shut off power at main breaker.  
Remove control panel top and front cover.  
Remove two (2) wires on primary side, note color and location.  
Remove three (3) wires on secondary side, note color and location.  
Remove two (2) screws from transformer base and replace assembly.  
Reinstall in reverse order and check system operation.  
TEMPERATURE DISPLAY - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
Shut off power at main breaker.  
Remove control panel top and front cover.  
Remove all wires from temperature display and mark wires for reassembly.  
Pry temperature display to remove from mounting tabs (this is a pressure fit).  
Reassemble in reverse order.  
CALIBRATION OF TEMPERATURE DISPLAY  
1.  
Place the thermocouple of your test meter through a finger hole in the top center of the oven. Pre-heat  
the oven to 500°F for 30 minutes.  
2.  
3.  
Set switch on back of temperature display to read desired temperature (°F or °C).  
Adjust "Temp. Adj." pot on back of temperature display until display matches actual oven temperature.  
MERCURY CONTACTOR - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
Shut off power at main breaker.  
Remove control panel top and front cover.  
Disconnect all wires and mark for reassembly.  
Remove screws from mounting bracket and remove contactor.  
Reassemble in reverse order.  
AIR PRESSURE SWITCH - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
7.  
Shut off power at main breaker.  
Remove control panel top and front conveyor.  
Disconnect wiring and mark for reassembly.  
Disconnect air tube.  
Remove mounting screws.  
Reassemble in reverse order.  
Turn on power and calibrate air switch as follows:  
Turn adjusting screw counter-clockwise to full out position.  
Turn oven on.  
Turn adjusting screw clockwise until heat shuts off.  
Turn adjusting screw counter-clockwise 1/4 turn and unit should heat.  
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HEATING ELEMENT - REPLACEMENT  
1.  
2.  
3.  
4.  
5.  
6.  
7.  
8.  
9.  
Shut off power at main breaker.  
Remove back cover.  
Disconnect heater element wires and mark for reassembly.  
Disconnect motor wiring and mark for reassembly.  
Remove oven back from oven.  
Remove fan shroud.  
Heater element may now be unbolted and removed.  
Check heater elements to be sure they ar the proper replacement.  
Reassemble in reverse order. Apply anti-seize compound to back bolt threads before reassembly.  
NOTE: Be sure the lead terminals are tight. If the leads are not tight, a loose connection will result, causing  
arcing and lead wire burn off.  
BEARING, CONVEYOR  
1. Remove conveyor from oven and place on a flat work surface.  
2.  
3.  
Remove connecting links from conveyor belting.  
Move drive shaft or idle shaft toward end of conveyor, and shaft with bearing will now slip out of holding  
bracket.  
4.  
Replace bearing and reassemble.  
24  
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Impinger II –Advantage Service Manual - Domestic  
25  
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PARTS / GENERAL  
LETTER  
PART NUMBER  
369390  
DESCRIPTION  
Caster 4” w/ Mounting Plate  
Bottom Finger Cover  
Columnating Panel, see Installation & Operations Manual  
Bottom Finger Housing  
Top Finger Housing  
Columnating Panel, see Installation & Operations Manual  
Top Finger Cover  
Oven Top  
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
369502  
370010  
369504  
369503  
369511  
369659  
369225  
369211  
370118  
369231  
369232  
369919  
370066  
Conveyor Hole Cover  
Baffle  
Thumb Screw  
Cross Support  
Caster 4” w/ Threaded Stem  
Adjustable Leg  
Stand Side  
Plug  
26  
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PARTS / CONTROL BOX 1116-000-A, 1117-000-A  
LETTER  
PART NUMBER  
370108  
369128  
370073  
370107  
370131  
369845  
350224  
369805  
369809  
369449  
369124  
369537  
369131  
370061  
369823  
370065  
369901  
369568  
369938  
369552  
369398  
369366  
369401  
370072  
369263  
369556  
369557  
369531  
370064  
357067  
369192  
369532  
369507  
369431  
369465  
370074  
369856  
369166  
369129  
369331  
369566  
369524  
DESCRIPTION  
Control Box Top  
Pilot Light  
Temperature Display  
Side Panel  
Operations Label  
Knob  
Lens, Yellow  
On/Off Switch  
Conveyor Potentiometer  
Temperature Potentiometer  
Cooling Fan  
Power Cord  
Thermocouple  
Conveyor Motor Assembly (Includes “O’ & “P”  
Hall Effect Sensor  
Magnet 16 Pole  
Manifold Burner  
Venturi, Natural Gas  
Venturi, LP Gas  
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
Hot Surface Ignitor  
Solenoid Valve  
U
V
W
X
Y
Burner Blower Motor  
Air Shutter Assembly  
Transformer, Temperature Display  
Gas Valve Nat/LP  
Bypass Orifice, Nat.  
Bypass Orifice LP  
Transformer 24 VAC, Burner  
Circuit Breaker .4 Amp  
Thermostat, Hi-Limit, Oven Cavity  
Capacitor  
Z
AA  
BB  
CC  
DD  
EE  
FF  
GG  
HH  
II  
Ignition Control  
Thermostat, Cooling Fan  
Thermostat, Control Box Hi Limit  
Electronic Temperature Control  
Conveyor Control  
Stand-Off Support  
Fuse, 10 Amp  
Fuseholder  
Finger Guard  
Main Burner Orifice Nat.  
Main Burner Orifice LP  
JJ  
KK  
LL  
MM  
28  
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BLOW UP / CONTROL BOX – 1116-000-A, 1117-000-A  
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PARTS / CONTROL BOX – 1130-000-A THRU 1133-000-A  
LETTER  
PART NUMBER  
370108  
369467  
370073  
370107  
370132  
369845  
350224  
369432  
369809  
369449  
370065  
369823  
370061  
369131  
369378  
370067  
369479  
370072  
369025  
369431  
369507  
369465  
369856  
370074  
369192  
357067  
370064  
370134  
370133  
353082  
369129  
369166  
369331  
DESCRIPTION  
Control Box Top  
Pilot Light  
Temperature Display  
Side Panel  
Operations Label  
Knob  
Lens, Yellow  
On/Off Switch  
Conveyor Potentiometer  
Temperature Potentiometer  
Magnet 16 Pole  
Hall Effect Sensor  
Conveyor Motor Assembly (Includes “K” &”L”)  
Thermocouple  
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Cooling Fan  
Mercury Contactor 1 Phase  
Mercury Contactor 3 Phase  
Transformer, Temperature Display  
Air Pressure Switch  
Thermostat, Control Box Hi Limit  
Thermostat, Cooling Fan  
Electronic Temperature Control  
Support, Stand Off  
Conveyor Control  
Capacitor  
Thermostat, Oven Cavity Hi Limit  
Circuit Breaker  
Electric Box Cover  
Electric Box  
Ground Lug  
Fuseholder  
Q
R
S
T
U
V
W
X
Y
Z
AA  
BB  
CC  
DD  
EE  
FF  
Fuse 10 Amp  
Finger Guard  
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BLOW UP / CONTROL BOX – 1130-000-A THRU 1133-000-A  
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PARTS / CONVEYOR & DOOR  
LETTER  
PART NUMBER  
DESCRIPTION  
A
B
C
D
E
F
G
H
J
369611  
369664  
369269  
370116  
369223  
369224  
369666  
369226  
369516  
369514  
369515  
370509  
369978  
369238  
369513  
369510  
370016  
369501  
1123D  
369927  
369925  
369926  
369929  
369165  
369194  
363394  
370155  
370157  
Coupler  
Coupling Center  
Ball Plunger  
Set Screw  
Crumb Pan, Right  
Crumb Pan, Left  
Conveyor Frame Assembly  
Pan Stop  
Conveyor Bearing  
K
Idler Shaft  
Sprocket, Regular Conveyor  
Sprocket, Heavy-Duty Conveyor  
Set Screw  
Drive Shaft  
Hinge  
Door Assembly (Includes N, P, and Q)  
Impinger Nameplate  
Door Latch & Catch  
Door With Window (Includes N, P, and Q)  
Window Frame, op  
Glass, Access Window  
Window Frame, Bottom  
Retainer, Window  
L
M
N
O
P
Q
R
S
T
U
W
X
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  
Y
32  
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PARTS / OVEN BACK ASSEMBLY  
LETTER  
PART NUMBER  
DESCRIPTION  
A
B
C
D
369182  
369899  
369655  
369183  
369184  
369976  
369549  
369581  
369539  
369181  
369695  
369033  
369681  
369979  
369227  
369541  
Fan  
Fan Shroud  
Stand Off  
Heating Element 208V  
Heating Element 240V  
Rear Wall, Gas Ovens  
Rear Wall, Electric Ovens  
Motor Mount  
Motor, Gas Ovens, 120V  
Motor, Electric Ovens, 208/240V  
Motor Bracket  
Motor Clamps  
Cover, Back  
Bracket, Hi-Limit Thermostat  
Spring  
Bracket, Thermocouple  
E
F
G
H
I
J
K
L
M
34  
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BLOW UP / OVEN BACK ASSEMBLY  
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36  
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