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SERVICE MANUAL

1. gt PP 13999 Air Shutter 2002 QQ 13640 Plate Air Shutter 0 e Impinger 1400 Series Advantage Service Manual Dom amp Int l CONTROL BOX 1450 1451 1480 BLOW UP Impinger 1400 Series Advantage Service Manual Dom amp Int l 33 34 CONTROL BOX 1452 1453 DESCRIPTION K 13648 Power Terminal Block 12139420 Contactor 60 3905 Control Conveyor 1369858 Thermostat Hi Limit 0 ____ 370112 ____ 853014 Supply Terminal Ground 0 13690171 ________ Thermostat Temperature Conto R 13504 Lens Yellow S 1394544 AMPCicutBreaKer 17 9836090025 X QTeminadBlock ____ 369523 Relay Motor Power V 896950 Thermostat Capillary 3618 Sprocket 10 Tooth ____ __ 3692802 MotorandGearoxAssy 2 DD 3944 4 Cooling Fan Control Impinger 1400 Series Advantage Service Manual Dom amp Int l CONTROL BOX 1452 1453 BLOW UP Impinger 1400 Series Advantage Service Manual Dom amp Int l 35 36 CONTOL BOX 1454 1455 LETTER PART DESCRIPTION ____8 13904 Fuse10AMP ________ _____ 370137 ______ Label Front Panel E 13904 Knob Clear Skirt F 369434 Switch On Off
2. HILIMS 805836 123433 SH 1N34313 9NI1V3H H YOS HILVIH 3503 83 3 y 1 2 3514 24 VOL HOLOW N 4 3SNS 14 1081 02 38018348431 IINOULIITI 213 A18W3S5V 10d 42 1081 02 22 H33v3u8 11 12 82 O34 S Z HOLlI2VdVO 12 H9IH TOYLNOD LYLSOWYSHL E18 LIWIT H9IH LYLSONYIHL 218 9 171002 X08 10 1 0271 160 83 1 118 NES G2 N 69 43 69 09 69 69 G 63 9 6969 3 G3 092 0 09 69 ava 1 09 69 89 49 Gg 1 09 69 89 25 89 084 924 9333953 ord Ed 65 9 ES 9 15 06 ET CU 11 Impinger 1400 Series Advantage Service Manual Dom amp Int l SCHEMATIC 1454 1455 1192086 ZH OS 5 5 5130004 SNAYM 1404 ourejonpouqr sopAlespoay UIODUTT I 19809 I 3NO2 HOLIMS V OE HLIM Y SYM CHOLIMS 30 NO 193810 3583438 01 3LON 31 IHA u12 SYJEWNN 3HIM u3MOd TOYLNOD H3AH0 3S5NYML 80553 4405 3510 f IINCIOWYSHL NJAO uOLOY LNO2 d 80104 N3AO 1 AQv3u HOLIMS 9NIMIM IN34313 9NILV3H 21185 AV 138 AV 138 YO LOK NY4 9NI 7009 40 LOK YO LON INDVN 1 dWY 1 LA W Ed ld 805835 123443 TWH
3. WHY TV u3NungB NIYW dWY1 AQv3H 1 8065836 123433 NLYW 805835 JWY14 10114 HOSN3S 7081802 3603 YOL H0104 3503 1081802 3H lYH3dH31 21 0812113 831113 63 A T WISSY 104 HOA3ANOO 1081 02 u33v3ug 1100412 S Z HOLIOYdYO NIYM 10841802 YINYNE 10114 10H1NOJ H3Nung WEY TY 7 D HAT deo N 4 gt Impinger 1400 Series Advantage Service Manual Dom amp Int l 10 TROUBLESHOOTING GUIDE GAS OVENS IMPINGER ADVANTAGE SERIES SYMPTOM POSSIBLE CAUSE EVALUATION Oven fan will not run ncoming Power Supply Check breakers reset if required Call Power Co if NOTE needed Export Ovens For some export ovens there is a control circuit step down transformer This transformer steps down supply voltage to 120 VAC If main fan will not run the secondary of this transformer must be checked for 120 VAC output Check specific oven model schematic for circuit location Check and or Replace Main Relay Check continuity to 120 VAC coil Check for power to relay coil 120VAC Check for supply voltage to relay contacts Visually check for contact pull in OFF Turn Fan Blade to check for locked rotor No control box Main Fan Relay Check for power to main fan relay Visually check for cooling contact pull in Axial Cooling Fan Check for power 120 VAC or 240 VAC check specific model to
4. 369119 Holder 60AMP ___ 1 369134 Fuse Lb 369576 Fitting M X 869578 Hose gt S 0 ____ 354258 Transformer P 3683 Control Conveyor 0 7 1369988 Thermostat Hilimt 3681 Thermostat Temperature Conto 5 950224 Lens Yellow U 369125 TerminalBlock V 1392 Relay MotorPowr gt Z gt SSS X 369158 Sprocket 10Tooth S DD 369800 Conveyor Control Pot Impinger 1400 Series Advantage Service Manual Dom amp Int l CONTROL BOX 1454 1455 BLOW UP Impinger 1400 Series Advantage Service Manual Dom amp Int l 37 38 CONTROL BOX 1456 1457 1474 1475 1476 LETTER PART DESCRIPTION B 936980 Conveyor Control Pot 13904 Fuse 10 J _____ _ 96980 Knob Clear Skirt 0 542 13907 Cooling Fan Thermostat 0 0 1 3655 Air Pressure Switch J 86976 ____ __ 13923 Transformer 3925 JTeminadBlock 13954 jSpakGeneatr 0 1399 Solid StateAlarm 369331 FingerGuard 04 0 13901 Thermostat Temperature Conto R 369128 pJPiotlght 1 5 950224 Lens Yellow 17 1398 Hose S 0 13650 Gas Valve Multi Block LL
5. 1400 Series Advantage Service Manual Dom amp Int l Temperature Control Board Check for 120 VAC input to temperature control board If not present check wiring from Hi Limit to temperature control board Turn the temperature adjustment dial to the maximum temperature position Check for 120 VAC at coil of mercury contactor s Next short the leads of thermocouple on the temperature control board check for 120 VAC at coil of mercury contactor s If voltage is not present replace temperature control board If voltage is present proceed Thermocouple Probe Remove thermocouple leads from the temperature control board and measure the millivolt output of the leads Refer to chart page 25 in adjustment section for proper millivolt readings Mercury Contactor s Check for 120 VAC to the contactor coil If voltage is present and contactor will not activate replace the contactor s Also check each contactor for proper high voltage input and output 50 Amp Fuses If there is no high voltage input to the mercury contactor s check the 50 amp fuses and replace if necessary Heater Elements Check the Amp draw on each hot leg for proper load Check the specification plate for rating information If the Amp draw is low or high check the individual elements for opens shorts and proper resistance To check resistance of the elements turn off the power Remove all leads from the elements and use an accurate digital VOM The element
6. Electrical power is permanently supplied through three 50A fuses to the normally open contacts of the mercury contactor Power is also supplied through 1 10A fuse to the normally open contacts of the main fan relay to the normally open cooling fan thermostat through a 3A fuse to the normally open single pole main fan switch Closing the main fan switch supplies 220 240 VAC to the primary of the control circuit step down transformer The transformer steps the voltage down to 120 VAC for the control circuit 120 VAC is supplied to the coil of the main fan relay The coil of the relay is energized the normally open contact close energizing the main fan motor and cooling fan Closing the main fan switch also supplies power to heat and conveyor control Upon closure of the on off switch 120 VAC is supplied through the air pressure switch through the normally closed oven cavity and control box hi limit thermostats to the electronic temperature control When 120 VAC is supplied to the temperature controller and the temperature dial is adjusted to the desired temperature the thermocouple will provide varying millivolts to the temperature controller The temperature controller supplies 120 VAC to the contactor coil at intermittent intervals closing the contactor and supplying 220 or 240 VAC to the heating elements to maintain desired temperature Closing the on off switch supplies 120 VAC to the conveyor control board AC volts are converted to D
7. THERMOSTAT COOLING FAN 1 Shut off power at main breaker 2 Remove control panel top and front cover 3 Remove lead wires and mark for reassembly 4 Remove two 2 screws and remove thermostat 5 Reassemble in reverse order MERCURY CONTACTOR 1 Shut off power at main breaker 2 Remove control panel top and front cover 3 Disconnect contactor wires and mark for reinstallation 4 Remove screws from mounting bracket and replace contactor NOTE Be sure contactor is not mounted upside down as this will cause a constant on condition 5 Reassemble in reverse order HEATING ELEMENTS 1 Shut off power at main breaker 2 Remove back cover 3 Disconnect heater element wire and mark for reassembly 4 Disconnect motor wiring and mark for reassembly 5 Remove oven back from oven 6 Remove fan shroud 7 Heater element may now be unbolted and removed 8 Check heater elements to be sure they are the proper voltage replacement 9 Reassemble in reverse order NOTE Be sure the heating element connections are tight 22 Impinger 1400 Series Advantage Service Manual Dom amp Int l BURNER BLOWER MOTOR REPLACEMENT 1 Shut off power at main breaker 2 Remove control panel top and front cover 3 Unplug motor connector 4 Remove three 3 screws from blower tube at burner housing 5 Remove air shutter assembly from old motor for installation on new motor assembly 6 Reassemble in reverse order and check system
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10. Int l GENERAL 1450 SERIES BLOW UP Impinger 1400 Series Advantage Service Manual Dom amp Int l 31 32 CONTROL BOX 1450 1451 1480 LETTER PART DESCRIPTION B 3914 Fuse 10 C E 13905 Switch On Off S O _____ 36980 Conveyor Control Pot O 4 1369507 J CoolingFanThermotat gt 3 1369154 7 AMP Circuit Breaker 202 3 369523 Relay Motor K 13683 Control Conveyor 500 M 93693933 JjlgniionConrolNATLP o N 369125 j TemindBlck 2020 ____ 13931 Thermocouple with Terminals gt P 369366 Burner Blower Motor Kit O Q 369131 Finger Guard Cooling Fan gt R 369801 Thermostat Temperature Control 22 8 1369128 Neon Pilotlight gt 713504 Lens Yelow 11 O JU 369804 JjKnobCOlarSkt gt V 36920 PilotShield Main MW 369144 Pil Shield Extension O X 369263 Gas Valve Body only for 1450 4 1451 3700235 140 O Y 13994 Pilot Shut off Valve O 2 3693988 Solenoid Valve NAT LP for 1450 8 1451 2222 137006 Solenoid Valvefor1480 2 3609 MainBumerOrfice LP gt 222221397013 Main Burner Orifice 1480 2 369100 Pilot Orifice LP gt 370114 Pilot 1480 gt DD ___ 369076 Burner Igniter 00 00 370027
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12. controller supplies 120 VAC to the contactor coils at intermittent intervals closing the contactors and supplying 208 or 240 VAC to the heating elements to maintain desired temperature The ready lamp is energized with the contactors 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 amp 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 SEQUENCE OF OPERATIONS MODEL 1454 380 220 VAC 50 HZ 3 PHASE MODEL 1455 415 240 VAC 50 HZ 3 PHASE Electrical power is to be supplied to the oven by a 5 conductor service Black conductor is hot Red conductor is hot Orange conductor is hot White conductor is dedicated neutral Green conductor is ground When the temperature in the control box reaches 120 F 3 49 C 1 7 C the cooling fan thermostat will switch power to the cooling fan The thermostat will interrupt power to the cooling fan when the temperature falls to 100 F 3 37 1 7
13. 2 Remove control panel top and front cover 3 Loosen set screw on conveyor drive sprocket and slide sprocket off shaft 4 Disconnect motor plug and wiring for hall effect sensor board 5 Remove four 4 screws from motor frame on control box side and remove motor assembly 6 Remove sensor board See Note 7 Reassemble in reverse order making sure to align chain sprockets and adjust motor for proper chain tension 1 2 SAQ NOTE When replacing the drive motor it will be necessary to also install a new magnet on the shaft up against the shoulder and cement in place REVERSING CONVEYOR DIRECTION All ovens leaving our plant are wired to operate conveyors from left to right To reverse conveyor direction use the following procedure 1 Shut off power at main breaker 2 Remove control panel top 3 Remove cover from relay box 4 Reverse wires fastened to terminals and A on conveyor control board 5 Reassemble in reverse order 26 Impinger 1400 Series Advantage Service Manual Dom amp Int l HALL EFFECT SENSOR REPLACEMENT 1 Shut off power at main breaker 2 Remove control box cover 3 Remove three 3 wire connector from hall effect sensor board 4 Remove two 2 screws from conveyor drive motor 5 Remove sensor board from mounting bracket 6 Reassemble in reverse order 7 Reinstall plug on hall effect sensor board 8 Replace control box covers and check system operation CIRCUIT BREAKER REPLA
14. 50 HZ 3 PHASE See 5 MODEL 14557918 240 VAG 3 PHASE sounds er be er eect er e itl het 5 SEQUENCE OPERATIONS Larsen 6 MODEL 1456 220 240 VAC 50 HZ NATURAL 6 MODEL 7457 7220 240 GAS EE A Da vb beta eR Prev aem TEA 6 MODEL 14744 220 240 VAC 7 50 NATURAL QUAS excuses eter tra tens 6 MODEL 1475 1220 240 VAC O0 AZT LP OGAS v ee aat er i En eet ain 6 MODEL 14767 220 240 VAC 7 50 HZ P TOWN GAS cassie iesus apex eth a QS EE AX RR x ada ants EU P ORE ERE RR RN RA Rr 6 SGHEMATIOd450 7 SAS aute 7 SOHE MATIG 4525452 ME 8 jb plat c T 9 SGHENATIOC 14595 TN 10 SETE TALA TATE cede tne aaa awa _ __ 11 ae II ack oem 12 PS o arsit 12 SOUS ESROOSTINOXUIDE yusa en Nea erect isles o uh Boda terns a aya EE 19 zi s OVE N C c P 19 REMOVAL INSTALLATION S ADJDSINPENISQS e 22 CONVEYOR CONTROL BOARD ASSEMBLY 28 GENERALS T450 SERIE s eet 30 GENERAL 1450 SERIES BLOW UP ERR EE sx tp aces Se 31 CONTROL BOX 1450 1951 1480 iim u T e EAR
15. 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 10K 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 Impinger 1400 Series Advantage Service Manual Dom amp Int l 13 DC Motor Control Board Check for 120 VAC input to the control board at terminals L1 and L2 If not present check the oven fan switch and wiring back to 3 amp fuse and then back to power source if necessary If 120 VAC is present at L1 and L2 check both fuses on control board 4A line and 1A armature check the VDC output at terminals A and A If 120 is present at terminals L1 and L2 and DC voltage is present 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 If the motor fails the above tests replace motor 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 the H S board are not damaged Replace as needed Conveyor Check for any mechanical mis alignment Also check f
16. cooling fan If voltage is present at the fan motor and the fan does not run replace fan assembly box cooling power atcooling fan thermostat Cooling Fan Thermostat Check cooling fan thermostat thermostat closes at 120 F and opens at 100 F With cooling fan thermostat pre heated check for continuity switch Is open replace Axial Cooling Fan WITH POWER OFF check for locked rotor Check for proper voltage to the cooling fan if present and fan does not run replace the fan Control box cooling Cooling Fan Thermostat See Cooling Fan Thermostat NOTE Thermostat fan continues to run will remain closed if control box temperature exceeds 120 Oven will not heat Check for adequate gas supply to oven Model 1450 1451 Manual Gas Shut off Valve Check to see that manual shut off valve is open Check if main oven fan is operating If not refer to Oven fan will not run on page 11 For 1456 1457 Centrifugal Switch Check for 120 VAC on both sides of Main Fan 1475 1476 See switch If voltage present on one side only and motor Page 14 is running replace motor Transformer 24 VAC Check for 120 VAC to primary of transformer Check for 24 VAC from secondary of transformer If there is primary voltage but no secondary voltage replace transformer Burner Blower Motor Check for 120 VAC supply to burner blower motor If 120 VAC is present and motor does not run replace motor WITH POWER OFF turn blower wheel to check f
17. energized with the solenoid valve an electronic flame monitor proves main flame operation in the 1474 1475 1476 models CONVEYOR DRIVE Closing the on off switch supplies 120 VAC through the step down transformer to the conveyor control board AC volts are converted to DC volts and are supplied to the conveyor motor at terminals and A Adjustment of the speed control potentiometer will change resistance at terminals P1 amp 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 Impinger 1400 Series Advantage Service Manual Dom amp Int l 5 SCHEMATIC 1450 1451 1480 46052082 ZH 09 1521 0851 S1300A 3NAVM 1804 Du S PMIpoly T SIS S NO 9 62 2 S NJ a lt g 28 fa 00 D Gp LYX dd 311 4 872 SYI3GWNN SHIM XX LIN YW W TOYLNOD YINYNS YSWYOSSNVYL LUX AQv3H dWv1 JOYLNOJ EA HOLIMS dW 1 idl YOSN3S 123443 TH SH 10114 LA HOLINDL XY dS YOSNSS 3WY d
18. operation NOTE Check air shutter adjustment and adjust if necessary Set air shutter at approx 1 4 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 BLOWER WHEEL BURNER This is part of the burner blower motor assembly TO REMOVE THE BLOWER WHEEL FOR PERIODIC CLEANING 1 Shut off power at main breaker 2 Remove control panel top and front cover 3 Remove air shutter held by 3 screws 4 Loosen set screws on blower wheel hub and pull straight out 5 Reassemble in reverse order NOTE There is no critical placement of the blower wheel on the motor shaft Just back as far as it will go and then spin the blower to be sure it is not rubbing BURNER CONTROL HONEYWELL REPLACEMENT 1 Remove control panel top and front cover 2 Remove wires from control note wire numbers and location for reassembly 3 Remove Two 2 screws from control Shut off power at main breaker and replace 4 Reassemble in reverse order and check system operation BURNER ASSEMBLY 1 Shut off power at main breaker 2 Shut off gas supply 3 Remove control panel top and front panel 4 Remove gas control valve See GAS CONTROL VALVE 5 Disconnect pilot tube 6 Remove solenoid valve See SOLENOID VALVE 7 Remove four 4 screws that secure the burner backing plate 8 Remove burner assembly from housing the main and pilot orifice flame target pilot
19. panel Place a temperature sensor in the center of the oven between top two middle fingers and set temperature control to 500 F allow temperature to stabilize approx 30 min and adjust knob to actual temperature Impinger 1400 Series Advantage Service Manual Dom amp Int l BURNER IGNITOR 1 Shut off power at main breaker 2 Remove control panel top and front cover 3 Remove burner assembly SEE BURNER ASSY 4 Remove pilot shield and pilot shield extension 5 Remove burner igniter 6 Reassemble in reverse order Spark gap approx 100 in 2 5 mm NOTE Be sure to reconnect burner igniter cable to ignition control THERMOCOUPLE REPLACEMENT 1 Shut off power at main breaker 2 Remove control panel top and front cover 3 Slide thermocouple out of oven chamber NOTE Remove conveyor and bottom fingers 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 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 thermocoupl
20. pole main fan relay the cooling fan thermostat and through a 3A fuse to the normally open double pole main fan switch Closing the oven fan switch supplies line voltage to the primary of the control circuit step down transformer The transformer steps the voltage down to 120 VAC for the control circuit 120 VAC is supplied to the coil of the double pole main fan relay The coil of the relay is energized The normally open contacts now close energizing the main fan motor through one 10 fuse and the cooling fan motor BURNER CIRCUIT Closing the oven fan switch supplies line voltage through the main fan air pressure switch through the gas pressure proving switch through the normally closed Hi Limit Thermostat to the ignition control The combustion motor is now energized The normally open combustion air switch closes upon sensing air After a pre purge period of between 30 and 60 seconds the spark generator and the main gas valve are energized Ignition should now occur after proving gas control relay is energized TEMPERATURE Closing the oven power switch supplies 120 VAC through the step down transformer to CONTROL the temperature control board The temperature dial is adjusted to desires temperature The thermocouple will provide varying millivolts to the temperature controller The temperature controller supplies120 VAC through contact of gas control relay to the solenoid valve at intervals to maintain desired temperature The ready lamp is
21. 2 Conveyor Belting 1 Foot Section B 395 RetainingRing gt Z o Z o o 6 369813 Conveyor Bearing Block ____ _____ D 1394 Roll Conveyor Notched ___ E _____ 369812 Conveyor Idler Shaft F 1394160 Conveyor Pan Stop 0 369814 ConnectingLink S ____ ______ 36981 Conveyor Drive Shaft _____ 996091601 Roller Chain _____ __ 1396 Crumb Pan L 870050 ConveyorFrame ___ 369162 Drive Chain 12 lt TIG Impinger 1400 Series Advantage Service Manual Dom amp Int l CONVEYOR 1450 SERIES BLOW UP Impinger 1400 Series Advantage Service Manual Dom amp Int l 44 79 Lincoln JE M CERTIFIED SERVICE AND PARTS Impinger 1400 Series Advantage Service Manual Dom amp Int l
22. 20 VAC to the solenoid valve and the yellow cycling lamp on the front panel at intermittent intervals to maintain desired temperatures CONVEYOR DRIVE Closing the on off switch supplies 120 VAC to the conveyor 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 amp 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 SEQUENCE OF OPERATIONS MODEL 1452 120 208 PHASE 60 HZ MODEL 1453 120 240 VAC PHASE 60 HZ POWER SUPPLY Electrical power is to be supplied to the oven by a 5 conductor service Black conductor is hot Red conductor is hot Orange conductor is hot White conductor is dedicated neutral Green conductor is ground CONTROL BOX AUTO When the temperature in the control box reaches 120 F 3 49 C 1 7 C the cooling COOL DOWN fan thermostat will switch power to the cooling fan The thermostat will interrupt power to the cooling fan when the temperature falls to 100 F 3 37 1 7 C MAIN FAN CIRCUIT Electrical power is permanent
23. ATOR REPLACEMENT 1 Remove control panel top and front cover 2 Remove two 2 wires for spark generator 3 Unplug spark lead on bottom of spark generator from ignition control 4 Remove two 2 mounting screws and remove generator assembly 5 Reassemble in reverse order and check system operation SOLENOID VALVE REPLACEMENT 1 Remove control panel top and front cover 2 Disconnect pipe union just above gas valve assembly 3 Disconnect two 2 wires from solenoid note wire number and location for reinstallation 4 Remove four 4 nuts from main orifice burner bracket and remove assembly 5 Replace valve and reassemble in reverse order 6 After assembly check all fittings for leaks and check system operation BURNER ALARM REPLACEMENT 1 Remove control panel top and front cover 2 Remove two 2 wires from alarm note wire numbers and location 3 Remove retainer cover from alarm and remove assembly from mounting bracket 4 Reassemble in reverse order and check LIGHT 220V REPLACEMENT 1 Remove control panel top and front cover 2 Remove two 2 wires from light assembly note wire number and location 3 Grasp body of light assembly and slide sideways to remove 4 Reassemble in reverse order and check TRANSFORMER STEP DOWN 120 VAC 1 Shut off power at main breaker 2 Remove control compartment covers 3 Remove wires from transformer and mark for reassembly 4 Remove 4 mounting screws from transfo
24. C 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 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 Impinger 1400 Series Advantage Service Manual Dom amp Int l SEQUENCE OPERATIONS MODEL 1456 220 240 50 HZ NATURAL GAS MODEL 1457 220 240 VAC 50 HZ L P GAS MODEL 1474 220 240 VAC 50 HZ NATURAL GAS MODEL 1475 220 240 50 HZ L P GAS MODEL 1476 220 240 50 HZ TOWN GAS POWER SUPPLY Electrical power is to be supplied to the oven by a three conductor service Brown conductor is hot Blue conductor is neutral Green conductor is ground CONTROL BOX AUTO When the temperature in the control box reaches 120 F 3 48 9 C 1 7 C the cooling COOL DOWN fan thermostat will switch power to the control box cooling fan The thermostat will interrupt power to the cooling fan when the control box temperature falls to 100 F 3 37 0 1 7 C MAIN FAN CIRCUIT Electrical power is permanently supplied to the normally open contacts of the double
25. CEMENT 1 Shut off power at main breaker 2 Remove control panel top and front panel 3 Disconnect two 2 wires from circuit breaker 4 Remove knurled mounting nut and push out 5 Reassemble in reverse order NOTE Be sure to reset breaker before operating MAIN ORIFICE REPLACEMENT 1 Shut off power at main breaker 2 Remove control panel top and front panel 3 Remove gas valve assy 4 Remove two 2 nuts from burner orifice bracket 5 Disconnect pipe union 6 Remove assembly and replace main orifice 7 Reassemble in reverse order and check system operation NOTE Check all gas line fittings for leaks PILOT ORIFICE BURNER 1 Shut off power at main breaker 2 Shut off gas supply 3 Remove burner assembly See Burner Assembly 4 Remove pilot line from pilot orifice 5 Remove pilot orifice from burner igniter 6 Reassemble in reverse order NOTE Check all gas line fittings for leaks ON OFF SWITCH REPLACEMENT 1 Shut off power at main breaker 2 Remove control box cover 3 Remove the access cover 4 Depress spring clips on side of switch and push out 5 Remove wires from back of switch note wire number and location 6 Reassemble in reverse order and check system operation NOTE Make sure switch housing is fully seated in control box housing Impinger 1400 Series Advantage Service Manual Dom amp Int l THE FOLLOWING ITEMS ARE USED IN THE MODEL 1456 1457 1474 1475 1476 IMPINGER OVENS AI
26. R PRESSURE SWITCHES REPLACEMENT AND ADJUSTMENT 1 Remove control panel top 2 Disconnect wires from switch making note of wire number and location for reinstallation 3 Remove air tube from switch assembly 4 Remove switch from wire hanger 5 Install new switch in reverse order make sure air tube is not blocked or miss aligned Adjust as needed To adjust the air pressure switch remove snap on cover on the side of the switch to expose adjusting screw To increase sensitivity turn screw counter clockwise to decrease sensitivity turn screw clockwise Check for proper line voltage switching from N C to N O as the air pressure switch closes GAS VALVE REPLACEMENT AND ADJUSTMENTS 1 Remove control panel top and front cover 2 Disconnect the gas piping from the back of the unit 3 Remove the four 4 screws from the incoming nipple mounting bracket 4 Remove incoming nipple 5 Disconnect two 2 plugs 1 3 prong and 1 4 prong Note location 6 Disconnect pipe union just above gas valve and remove assembly 7 Reassemble in reverse order check all pipe fittings for leaks After assembled check for proper adjustment of gas pressure switch 8 8 on dial for natural gas 23 for L P Gas and 4 5 for town gas 8 Check and adjust manifold pressure remove pressure tap located in gas piping above the gas valve prior to the burner orifice and install manometer Adjustment screw is located on the front of the valve remove plastic cap and adjust
27. SERVICE MANUAL DOMESTIC AND INTERNATIONAL IMPINGER CONVEYOR OVENS MODEL 1400 SERIES ADVANTAGE gt Lincoln Lincoln Foodservice Products LLC 1111 North Hadley Road Fort Wayne Indiana 46804 United States of America Phone 800 374 3004 U S Fax 888 790 8193 Int l Fax 260 436 0735 Technical Service Hot Line 800 678 9511 www lincolnfp com d _ 7 di STA nodis IAR CERTIFIED SERVICE AND PARTS 1450DomExptSvc REV 1 5 07 TABLE OF CONTENTS TABLE OF CONTENT x E 2 5 4 MODEL 1450 120 60 HZ 7 NATURAL 5 4 MODEL 1451 7 120 60 HZ LP GAS ee ins 4 MODEL 1480 7120 60 HZ TOWN GAS 2203260 tertie tere xx n AR ERN e 4 SFOQUENCE OF OPERA MONG ee 4 MODEL 1452 7120 208 VAC 3 PHASE 60 HZ irte tete Berk Q eat 4 MODEL T453 120240 VAG 3 PHASE iiis t A A en Ney 4 E 5 MODEL 14547390220 VAGT
28. UR 32 CONTROL BOX 1450 14511480 BLOWUP add 33 CONTROLBOX 1452 53 re eda 34 CONTROLBOX 1452 71453 BON UP 35 CONTOL BOX o 1 MS NN 36 CONTROBRBOX 1454 145 UP 37 CONTROL BOX 1456 1457 1474 1475 IME 38 CONTROL BOX 1456 1457 147414751476 BLOW UP ER 39 OVEN BACK GAS SEG UPC uuu u prie aia eed eed teed ct ees ea tag 40 OVEN BACK GAS ELEC TRIG BLOW AP ra be Un eee ee e 41 GONVEYOR SOS ER ES te Dec aa Sa been ea eee eet 42 CONVEYOR 1450 SERIES BELOW UP ua 43 2 Impinger 1400 Series Advantage Service Manual Dom amp Int l MODEL 1450 120 VAC 60 HZ NATURAL GAS MODEL 1451 120 VAC 60 HZ LP GAS MODEL 1480 120 VAC 60 HZ TOWN GAS POWER SUPPLY Electrical power is supplied to the oven by a three conductor cordset Voltage from the black conductor to white conductor is 120 VAC The white conductor is neutral The green conductor is ground AUTO COOL DOWN 48 9 C 1 7 C the cooling fan thermostat will switch power to the control box cooling fan The thermostat will interrupt power to the fan when the control box temperature falls to 100 F 3 37 0 1 7 C MAIN FAN CIRCUIT Electrical power is permanently supplied to the normally open contacts of the double pole main fan relay the cooling fan thermostat and th
29. ____ ______ 369570 Connector Pole 2 213957 4 X 1363998 Solenoid Valve 1456 1457 969869 7 Solenoid Valve 1474 1475 1476 13909 Main Burner Orifice LP 4 870113 Main Burner Orifice Town Gas 96910 Pilot Orifice LP S 370114 Pilot Orifice Town Gas SSS 3906 Burner Igniter 12 3984 Bracket HallEffect 00 369528 Motor Relay 1 10 0 PP 139805 Control Conveyor QQ 369573 jlgniionconro 136959 BlowerMoor Impinger 1400 Series Advantage Service Manual Dom amp Int l CONTROL BOX 1456 1457 1474 1475 1476 BLOW UP fe i Qn ui w 38 5 oo 3 Impinger 1400 Series Advantage Service Manual Dom amp Int l 39 40 Ss 2 B as D p p OVEN BACK GAS ELECTRIC DESCRIPTION 369808 370140 369800 369214 369033 369215 369192 369306 369646 369647 369213 369547 369307 369287 369315 369122 Impinger 1400 Series Advantage Service Manual Dom amp Int l OVEN BACK GAS ELECTRIC BLOW UP 4 FE EM Impinger 1400 Series Advantage Service Manual Dom amp Int l 41 42 CONVEYOR 1450 SERIES LETTER DESCRIPTION 969830 Complete Conveyor 13709
30. as needed 3 5 WC for Natural Gas and 10 WCfor L P 9 Check gas filter by removing cover plate located on either side of valve Remove four 4 screws and slide filter out of valve housing and inspect Reassemble in reverse order and check 10 for leaks around the cover SIDE VIEW TOP VIEW OUTPUT MANIFOLD PRESSURE PRESSURE ADJUSTMENT ADJUSTMENT ELECTRICAL CONNECTOF FILTER FILTER 7 COVER PLATE PLATE ELECTRICAL CONNECTOF 28 Impinger 1400 Series Advantage Service Manual Dom amp Int l IGNITION CONTROL REPLACEMENT 1 Remove control panel top and front cover 2 Depress two 2 locking clips on front cover of relay 3 Remove control portion of relay by pulling straight out rocking motion 4 Remove wires from plug in terminal strip note wire numbers and location 5 Remove two 2 screws from mounting bracket and remove 6 Reassemble in reverse order Check system operation HIGH LIMIT THERMOSTAT REPLACEMENT 1 Remove control panel top and front cover 2 Remove conveyor and fingers 3 Remove capillary bulb from wire form in oven chamber and pull through tube into control box 4 Remove two 2 wires from thermostat note wire numbers and location for reinstallation 5 Remove screws from bracket and remove thermostat 6 Reassemble in reverse order making sure capillary tube is placed securely in the wire form NOTE Depress reset button to insure thermostat is set for operation SPARK GENER
31. be connected in the following manner Light 1 attached in 120 VAC line after oven fan switch Light 2 attached after 120 contacts of oven motor centrifugal switch Light 3 in 24 VAC Burner Transformer Secondary Light 4 in 24 VAC at terminal 6 of Ignition control valve Light 5 in 24 VAC at terminal 3 of Ignition control valve Light 6 in 24 VAC at terminal 1 of Ignition control valve CODE All lights off lights of main power main fan off oven fan switch out 1 on 2 off 3 off 4 off 5 off 6 off Oven Motor Centrifugal Switch open 1 on 2 on 3 on 4 off 5 off 6 off Burner Motor Centrifugal Switch bad 1 2 3 on 4 on 5 Off 6 off Ignition Control bad 1 2 3 on 4 on 5 on 6 off Pilot Shield missing or warped no flame rectification Pilot Orifice plugged or Gas Control Valve bad 1 2 4 5 6 on Unit still not working Main Orifice plugged Gas Valve bad Temperature Control bad However Main Orifice would not be intermittent problem 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 Replace if defective Fuseholder Fan Switch Speed Adjustment This is a0 to 10 K ohm 1 turn potentiometer With Potentiometer power off remove the black and white pot leads from the motor control board at terminals P1 P2 Place the meter leads on the black lead P2
32. blockage to the main orifice check the temperature control Check for 120 VAC across L1 and L2 on temperature Electronic control board Pilot flame but no main flame 12 Impinger 1400 Series Advantage Service Manual Dom amp Int l Thermocouple Probe Remove thermocouple leads from the temperature control board and measure the millivolt output of these leads Refer to charts on page 25 in the adjustment section for proper readings Temperature Control Turn temperature control dial to full on position NOTE Thermocouple must be connected Measure for 120 VAC across terminals N O and Com if voltage is not present replace control Solenoid Valve If voltage is present at terminals N O and Com check for voltage at solenoid valve If voltage is present listen for valve to open and close Also check for opens and shorts in coil If solenoid valve is defective replace Intermittent Heating AS FOLLOWS Both the main fan motor and burner blower motor are equipped with thermo protection and will cease to operate when not cooled properly This can cause the units to cycle on and off intermittently Also most of the problems listed under oven will not heat can cause intermittent failures For continuing intermittent problems a series of test lights may be made and installed in the ovens The lights will allow the customer to advise the service technician a trouble code when the oven fails The lights should
33. e control board at terminals L1 and L2 If not present check back to power source if necessary If 120 VAC is present at L1 and L2 check the VDC output at terminals and A If 120 VAC is present at terminals L1 and L2 but DC voltage 15 not present at A and verify fuses are not blown if fuses check ok replace the board If DC voltage is present at A and A but motor does not run check gear motor as follows Impinger 1400 Series Advantage Service Manual Dom amp Int l 19 Conveyor Gear Motor If DC voltage is present 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 motor brushes for excessive or abnormal wear replace as needed Check the leads to the motor for evidence of any shorts or opens and each lead to ground If the motor fails the above tests replace motor Conveyor Check for any mechanical mis alignment or improper adjustment Also check for worn bearings The Installation and Operations Manual shows proper conveyor belt adjustment A conveyor belt that is over tightened will cause excessive bearing wear and sometimes irregular speed Conveyor speed Power Supply Check power supply at the DC control board for the varying 120 VAC at board terminals L1 and L2 If voltage is not present check main circuit breakers DC Gearmotor If the DC control board is steady then the problem may be the motor or gearbox Check the brus
34. e is present retrace wiring back to power supply Turn the temperature adjustment knob to the maximum temperature position and check for 120 VAC at the load terminal to neutral If 120 VAC is not present proceed as follows If 120 VAC is present and unit is not heating see Solenoid Valve Remove thermocouple leads from the temperature control board and measure the millivolt output of these leads Refer to chart in page 25 for proper readings If the thermocouple probe checks good then the problem is usually with the temperature control board If output voltage is present at temperature control board check for voltage at solenoid valve If voltage is present listen for valve to open and close Also check for opens shorts in coil Replace as needed Check for 120 VAC across L1 and L2 on temperature control board If no voltage is present retrace wiring back to power supply Turn the temperature adjustment knob to the maximum temperature position and check for 220 VAC atthe load terminal to neutral If 220 VAC is not present proceed as follows If 220 VAC is present and unit is not heating see Flame Monitor Check for 220 VAC at terminal COM on temperature control board If no voltage is present trace wiring back to ignition control Impinger 1400 Series Advantage Service Manual Dom amp Int l Thermocouple Probe Flame Monitor Relay Main Burner Valve Temperature Regulation Main Flame will not Fla
35. e normally open switch Closing the on off switch energizes the coil of the relay through the 3A fuse The normally open contacts now close energizing the main fan motor through the 10A fuse and the control box cooling fan Closing the on off switch also supplies 120 VAC to the burner blower motor the conveyor control board and to the normally open centrifugal switch of the main fan motor BURNER CIRCUIT Closing the on off switch supplies 120 VAC to the burner blower motor and the normally open centrifugal switch of the main fan motor As the fan motor reaches approximately 900 RPM the centrifugal switch closes supplying120 VAC to the electronic temperature control board and the primary of the burner control transformer The transformer secondary supplies 24 VAC through the normally open centrifugal switch inside the burner blower motor this switch closes at approximately 1600 RPM to the burner control The igniter circuit is now energized IGNITION CONTROL When the burner control is supplied with 24 VAC the pilot valve and spark igniter is energized Ignition should now occur after the pilot flame is proven the main gas valve is energized TEMPERATURE When the centrifugal switch of the main fan motor closes 120 VAC is applied to the CONTROL temperature controller The temperature dial is adjusted to the desired temperature The thermocouple will provide varying millivolts to the temperature controller The temperature controller supplies 1
36. e with a properly calibrated D C millivolt meter At 32 F the millivolt reading should be 0 00 Inserting the thermocouple into an ice bath can check this 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 The junction temperature is the ambient air temperature where the thermocouple fastens to the electronic temperature control N T 500 1246 125 1257 11 05 520 653 729 960 1057 1114 1269 506 659 725 ate 966 1043 1120 1274 12 80 12 86 12 89 12 92 1257 14 13 03 1457 13 09 1463 545 699 775 8 52 106 1080 1161 1815 1459 13 20 1474 1326 1480 13 32 1456 Impinger 1400 Series Advantage Service Manual Dom amp Int l 25 oom O1 O1 S R U N C T I O N a 9 Cn 0 1 amp ro O gt BURNER CONTROL TRANSFORMER REPLACEMENT 1 Shut power off at main breaker 2 Remove control panel top and front cover 3 Remove two 2 wires on primary side note color and location 4 Remove two 2 wires on secondary side no
37. eration 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 Ignition Control Check for proper line voltage supply to ignition control terminal 1 Check for proper line voltage to the Burner Blower Motor If voltage is present proceed with next step if not wait 30 seconds push reset button and try to restart If this fails check wires from thermostat and burner blower motor to the ignition control If all above fails and wires are okay replace ignition control Burner Blower Motor Check for line voltage to motor WITH POWER OFF turn blower wheel to check for locked rotor or blower wheel slippage If proper line voltage is present at motor connecting plug terminal 2 and 5 and motor does not run replace motor Air Pressure Switch Burner Check for proper line voltage switching from N C to Blower N O as air pressure switch closes Check for air switch adjustment air tube blockage or misalignment and if these fail replace air pressure switch Spark Generator A pre purge time of 30 to 60 seconds occurs after blower motor starts check for proper line voltage at spark generator If voltage is not present check reset button for the Ignition Control If voltage is still not present replace ignition control If voltage is present visually check for spark a
38. gas and start up oven 4 With oven at full fire manifold pressure should be 3 5 W C NAT 10 W C LP If adjustment is needed remove cover screw from valve body and adjust by turning regulator screw C W to increase C C W to decrease 5 Turn off electric power and gas replace cover screw remove manometer and adapter replace pressure tap plug 6 Check pressure tap for gas leaks before closing panel 7 Close control panel and check system operation SOLENOID VALVE 1 Shut off power at main breaker 2 Shut off gas supply 3 Remove control panel top and front cover 4 Remove gas control valve See GAS CONTROL VALVE 5 Disconnect wires from solenoid valve 6 Remove two 2 hex nuts that hold main orifice bracket in place 7 Remove solenoid valve assembly 8 Remove piping from solenoid valve 9 Reassemble in reverse order 10 Check all fittings for leaks ELECTRONIC TEMPERATURE CONTROL REPLACEMENT 24 1 Shut off power at main breaker 2 Remove control panel top and front cover 3 Remove one screw from control knob guard and move guard to one side 4 Remove knob and lock nut on control pot shaft and push out 5 Remove six 6 wires from temperature control Note wire numbers and location 6 Reassemble in reverse order NOTE All electronic temperature controls are preset and calibrated at the factory and no field adjustment is required other than aligning the temperature control knob to the scale on front
39. hes in the motor for excessive arching and or unusual wear Check the motor and gearbox from instruction located on page 20 under possible cause listing Conveyor gear motor Magnet Check to insure that the magnet cemented to shaft of conveyor drive motor has not been damaged or come loose from motor shaft Replace as needed Hall Effect Sensor Check for any physical damage to Hall Effect Sensor mounted on conveyor stepper 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 20 Impinger 1400 Series Advantage Service Manual Dom amp Int l REMOVAL INSTALLATION amp ADJUSTMENTS IMPINGER ADVANTAGE SERIES CAUTION BEFORE REMOVING OR INSTALLING ANY COMPONENT IN THE IMPINGER OVEN BE SURE TO DISCONNECT ELECTRICAL POWER AND GAS SUPPLY MOTOR MAIN FAN 1 Shut off power at main breaker 2 Remove louvered motor cover from back of oven 3 Remove wire way by taking out the 5 five hex screws 4 Disconnect wiring from motor 5 Remove the twelve 12 hex head bolts from the oven back and slide back straight out of the oven 6 Remove two 2 bolts 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 7 Remove the eight 8 hex head bolts from the motor mount and slide the motor assembly out of the oven back 8 Remove mot
40. ly supplied through 6 50A fuses to the normally open contacts of the mercury contactors Power is also supplied through 1 10A fuse to the normally open contacts of the main fan relay to the normally open cooling fan thermostat and through a 3A fuse to the normally open single pole main fan switch Closing the main fan switch supplies 120 VAC to the coil of the main fan relay The coil of the relay is Impinger 1400 Series Advantage Service Manual Dom amp Int l 3 HEAT CIRCUIT TEMPERATURE CONTROL CONVEYOR DRIVE POWER SUPPLY CONTROL BOX AUTO COOL DOWN MAIN FAN CIRCUIT HEAT CIRCUIT TEMPERATURE CONTROL CONVEYOR DRIVE energized the normally open contacts close energizing the main fan motor and cooling fan Closing the main fan switch also supplies power to the conveyor control and the centrifugal switch of the main fan motor Closing the on off switch supplies 120 VAC to the normally open centrifugal switch inside the main fan motor As the motor reaches approximately 900 RPM the centrifugal switch closes supplying 120 VAC through the normally closed oven cavity and control box hi limit thermostats to the electronic temperature control board When the centrifugal switch inside the main fan motor closes 120 VAC is applied to the temperature controller The temperature dial is adjusted to the desired temperature The thermocouple will provide varying millivolts to the temperature controller The temperature
41. m and check for steady operation MODELS 1456 1457 1474 1475 1476 Oven will not heat Gas Supply Check for adequate gas supply to oven Manual Gas Shut Off Valve Check to see that manual shut off valve is open Fan Switch Check to see that the fan switch is on Main Oven Fan Check if main oven fan is operating If not refer to Oven fan will not run Check for supply voltage on both sides of switch If voltage present on one side only check for air tube Air Pressure Switch blockage or misalignment adjust air switch Replace as needed 14 Impinger 1400 Series Advantage Service Manual Dom amp Int l Gas Pressure Switch This switch is located inside the gas valve and should close when gas pressure is present WITH POWER OFF remove 3 prong plug on gas valve and measure continuity between terminals 2 and 3 NOTE Remove insulation pad below plug to read numbers If no continuity check the following 1 Proper gas pressure supply to the gas valve as marked on the oven specification plate 2 Check for proper adjustment of gas pressure switch 8 8 on dial for natural gas 23 for LP and 4 5 for Town Gas 3 Check gas filter in gas valve for blockage or damage See Adjustment Section on page 28 If above checks are okay but pressure switch is still not closed replace gas valve Hi Limit Thermostat Thermostat is normally closed opens at 368 C 695 If open reset and test oven for proper op
42. me Monitor stay lit Intermittent heating As Follows Remove thermocouple leads from the temperature control board and measure the millivolt output of these leads Refer to chart on Page 25 for proper readings If the thermocouple probe checks good replace temperature control Check for 220 at terminal 1 If no voltage is present trace wiring back to temperature control Check for 220 VAC output at terminal 48 NOTE There is a delay of up to 2 seconds for 220 VAC output at terminal 8 If there is no voltage output at terminal 48 check the reset button Replace control as needed Check for 220 VAC at relay coil if no voltage is present trace wiring back to flame monitor Check for 120 VAC to relay contacts If no voltage is present trace wiring back to power supply Check to ensure contacts are closing Replace relay as needed Check for 120 VAC at valve if no voltage is present trace wiring back to relay If voltage is present listen for valve to open and close Check for opens or shorts in coil Replace as needed There should be a visible main flame at this time To check for flame monitor operation connect a digital voltmeter capable of measuring D C microamperes between the flame sensor and terminal 15 on the flame monitor The flame monitor requires a minimum of 4 micro amp D C for proof of flame If these readings are not achieved replace sensor assembly Also check for any type of damage to flame sens
43. n Fan Relay Check for power to main fan relay Visually check for cooling contact pull in Axial Cooling Fan WITH POWER OFF turn fan blade to check for locked rotor Check for power to cooling fan If voltage is present at the fan motor and the fan does not run replace fan assembly No automatic control Check circuit breakers reset if required call Power box cooling Company if needed Thermostat is normally open and closes at 120 F 3 48 9 C 7 and opens at 100 F 3 F 37 8 1 7 C Oven will not heat Check if main oven fan is operating If not refer to Oven fan will not run Page 18 Centrifugal Switch Main Fan Check for 120 VAC on both sides of switch If voltage Model 1452 1453 is present on one side only and motor is running replace motor Air Pressure Switch This normally open switch should close when the 1454 1455 main fan is activated If adjustment is necessary Refer to page 28 Check tube for blockage Replace if defective Hi Limit Thermostat Oven Terminals are normally closed If open reset and test Cavity oven for proper operation If thermostat will not hold for maximum oven temperature and oven is not exceeding temperature dial setting replace thermostat Control Box High Limit Terminals are normally closed but open at 130 F Thermostat 5 F 53 9 C 2 8 C Check for over heating and reset thermostat Test for proper operation If it will not reset and hold then replace 18 Impinger
44. or wire and connections If the reading is above the minimum required and the flame monitor will not supply 220 VAC to the relay coil replace the flame monitor Both the main fan motor and burner blower motor are equipped with thermal protection and will cease to operate if overheating occurs This can cause the units to cycle on and off intermittently This may be caused by improper ventilation Also most of the problems listed under oven will not heat can cause intermittent failure See page 13 for test lights Impinger 1400 Series Advantage Service Manual Dom amp Int l 17 TROUBLESHOOTING GUIDE ELECTRIC OVENS IMPINGER ADVANTAGE SERIES SYMPTOM POSSIBLE CAUSE EVALUATION Oven fan will not run Incoming Power Supply Check breakers Reset if required Call Power Co if needed Check and or Replace Fuse Holder Check and or Replace Fan Switch Check continuity between switch terminals For these oven models there is a control circuit step 1454 1455 down transformer This transformer steps down supply voltage to 120 VAC If main fan will not run the secondary of this transformer must be checked for 120 VAC output Check specific oven model schematic for circuit location Main Relay Check continuity to 120 VAC coil Check for power to the relay coil 120 VAC Check for 120 208 220 240 VAC to relay terminals Visually check for contact pull in OFF Turn Fan Blade to check for locked rotor No control box Mai
45. or by taking off motor clamp and removing the four 4 mounting nuts and washers 9 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 A Torque specs on bolts 150 torque B 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 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 ku i MADE FROM CONE TO FAN SPIDER FAN HUB 1 1 2 INCH CONE y Impinger 1400 Series Advantage Service Manual Dom amp Int l 21 CAPACITOR MOTOR 1 Shut off power at main breaker 2 Remove motor cover from back of oven 3 Discharge capacitor 4 Remove and replace RELAY D P S T 1 Shut off power at main breaker 2 Remove control panel top and front cover 3 Remove cover from relay box 4 Disconnect all wires and mark for replacement 5 Remove relay by removing two 2 mounting screws 6 Reassemble in reverse order COOLING FAN CONTROL BOX 1 Shut off power at main breaker 2 Remove control panel top and front cover 3 Remove four 4 screws from the fan frame 4 Disconnect cord and plug and remove fan 5 Reassemble in reverse order
46. or locked rotor Impinger 1400 Series Advantage Service Manual Dom amp Int l 11 Centrifugal Switch of Burner Check for 24 VAC output from secondary of Blower Motor transformer If voltage is present check for 24 VAC at pin 6 and ground on ignition control If the burner blower motor is running and there is no voltage at pin 6 and the ground on the ignition control replace the burner blower motor Ignition Control Check for 24 VAC supply to the ignition control at pin 6 and the ground If voltage is present check for 24 VAC across pin 3 and ground pilot valve NOTE The Honeywell ignition control has a 30 sec pre purge Time Delay built in If voltage is not present replace electronic control package If the pilot valve is energized check to see that the high voltage igniter circuit is also energized To check disconnect the igniter lead from the ignition control Place female terminal of igniter lead approximately 1 8 from terminal post on ignition control Spark should jump the 1 8 gap If no spark is present replace ignition control NOTE control will try for ignition for 15 seconds only No Pilot If the ignition control is supplied with 24 VAC and the pilot valve internal to valve assembly and igniter circuits are energized visually check for pilot flame This may be done by opening the small inspection door on the end of the burner or by opening the main oven door and looking under the lower finger ho
47. or worn bearings A conveyor belt that is over tightened may cause excessive bearing wear and sometimes irregular speed varying or intermittent 120 VAC at board terminals L1 and L2 D C Motor Control Board Place the test meter probes on terminals A A With speed potentiometer set to maximum speed Approx 2 min The meter reading should be approximately 100 VDC 2390 The board output is steady If the board voltage output is unsteady beyond limits 13 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 14 under possible cause Listing conveyor gear motor Magnet Check to insure that the magnet cemented to shaft of conveyor drive motor has not been damaged or come loose from motor shaft Replace as needed Hall Effect Sensor Check for any physical damage to Hall Effect Sensor mounted on conveyor drive motor Check all wiring and connections for damage Check all connections for tightness or proper location and check all wiring for visible damage Replace as needed Connect new Hall Effect to syste
48. place ignition control flame check for any obstructions in pilot orifice There should be a visible pilot flame at this time To check for flame sensor operation connect a digital multimeter capable of measuring D C micro amperes between the flame sensor wire and the ignition control NOTE this is a current measurement Flame Sensor Pilot flame but burner will not stay ignited Power Supply Ignition Control Gas Control Relay Temperature Control Indicator light is on but no main flame Model 1456 1457 Thermocouple Probe Solenoid Valve Indicator light is on Temperature Control but no main flame 1474 1475 1476 16 and the meter must be connected in series Proper current readings should be minimum of 3 micro AMP D C If these readings are not achieved replace igniter sensor assembly Also check for any type of damage to flame sensor wire and connections If there is sufficient micro amp current but the flame will not stay lit check for proper polarity of the input power supply If there is sufficient flame sensor current but the burner will not remain ignited check reset button on ignition control if all above are okay replace ignition control Check for 220 VAC to relay coil If no voltage is present trace wiring back to ignition control If voltage is present check to insure contacts are closing Check for 120 VAC across L1 and L2 on temperature control board If no voltag
49. resistance should be as follows 208V 9 8 ohms approx 220V 10 5 ohms approx 240V 18 ohms approx If all readings are not correct replace elements as needed Oven heats with Mercury Contactor s The mercury contactor has probably malfunctioned in switch off 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 Conveyor will not run Voltage Supply Export Ovens Check incoming voltage supply check breakers and reset if required For some export ovens there is a control circuit step down transformer This transformer steps down supply voltage to 120 VAC If conveyor will not run the secondary of this transformer must be checked for 120 VAC output Check specific oven model schematic for circuit location Speed Adjustment This is a 0 to 10K ohm 1 turn potentiometer With Potentiometer power off remove the black and white pot leads from the motor control board at terminals P1 and P2 with a digital multimeter check the ohm reading on the black lead P2 and the white lead P1 Rotating the pot slowly from low to high the meter reading should show an even transition from 0 to 10K ohms 596 There should be no dead or open spots through out the 1 turn of the pot Check both leads to ground There should be no continuity to ground If any of the above checks fail replace the pot DC Motor Control Board Check for 120 VAC input to th
50. rmer base and replace 5 Reassemble in reverse order NOTE Voltage output of the secondary is to be 120 1096 Check for this output at the secondary before installing leads to the secondary If voltage above or below is measured recheck the position of the primary leads Impinger 1400 Series Advantage Service Manual Dom amp Int l 29 30 GENERAL 1450 SERIES LETTER PART DESCRIPTION B 310 JAccessWindowAssy 369929 Retainer New Style D 369828 X Handle Spacer 130658 Handle O 1211391 Handle Spacer 2 Required 396 jDoolath o 13906 7 Scew832xDB8 0 32700 Door Assy Solid P 30957 Door Assy WWindow 0 154 FingerSupportAssy R 7 136057 Support Bracket Pins 8 13943 Strike Assy o ____ _____ 369062 Control Panel V 369140 Compression Spring Ww 39023 Washer Flat X 13691441 Conveyor Hold Down Bracket 2 369058 Baffle Inlet and Outlet _____ 369211 Thumb Screw Not Shown 0 0 DD ____ 369373 Receptacle 27 Columnating Panels See Installation Manual 00 39 Window Frame Bottom 13925 9 Glass Access Window ca ___ 369927 Top 4 A n N Impinger 1400 Series Advantage Service Manual Dom amp
51. shield main and extension burner ignitor can now be changed or serviced as needed 9 Reassemble in reverse order GAS CONTROL VALVE 1 Shut off power at main breaker 2 Shut off gas supply 3 Remove control panel top and front cover 4 Disconnect the gas piping from the back of the unit 5 Remove the four 4 screws from the incoming nipple mounting bracket 6 Remove incoming nipple 7 Remove pilot tube assembly from control valve 8 Disconnect pipe union just above solenoid valve 9 Disconnect wiring from control valve making note of wire numbers and location Remove piping from old valve for installation on new valve 10 Reassemble in reverse order after assembly is complete be sure to check manifold pressure 3 5 W C NAT GAS 10 W C LP and adjust if necessary See Section MANIFOLD PRESSURE ADJUSTMENT NOTE Check all gas line fittings for leaks after installation Impinger 1400 Series Advantage Service Manual Dom amp Int l 23 PILOT CONNECTION MANIFOLD ADJUSTMENT 74 SCREW LOCATED UNDER COVER SCREW MANIFOLD PRESSURE ADJUSTMENT CONNECTION LINE LI MANIFOLD ADJUSTMENT C SCREW LOCATED UNDEF COVER SCREW TOP VIEW MANIFOLD PRESSURE ADJUSTMENT 1 Remove control panel top and front cover 2 WITH ELECTRIC POWER AND GAS OFF remove the outlet pressure tap plug from the gas control valve and install the adapter fitting and manometer 3 Turn on electric power and
52. t igniter head located in end of burner Igniter Sensor Assembly Check this assembly for visible damage If there is no damage replace the spark generator If there is damage replace the Igniter Sensor Assembly Also check for frayed or damaged wires in the burner tube Check spark gap should be 100 inch 2 5 mm Replace as needed Gas valve This solenoid is located inside the gas valve and should open when proper line voltage is present If no voltage is present check the reset button on the ignition control and all connections for tightness If there is still no voltage present at gas valve replace ignition control If there is voltage present check for gas pressure at the gas pressure tap located in the gas piping just prior to the burner If there is no gas pressure replace gas valve Impinger 1400 Series Advantage Service Manual Dom amp Int l 15 Flame Sensor Flame will not stay on Ignition Control To check for flame sensor operation connect a digital multimeter capable of measuring D C micro amps between the flame sensor wire and Ignition Control Sensor current from sensor control is 3 micro amps minimum If these readings are not achieved replace igniter sensor assembly Also check for any type of damage to flame sensor wire and connections If there is sufficient flame sensor current but the burner will not remain ignited check the reset button on ignition control If all above are okay re
53. te color and location 5 Remove two 2 screws from transformer base and replace assembly 6 Reinstall in reverse order and check system operation HEAT LIGHT 1 Shut off power at main breaker 2 Remove control panel top and front panel 3 Remove the two wires from burner light note number and location 4 Grasp body of light assembly and slide sideways to remove 5 Reassemble in reverse order and check CONVEYOR CONTROL POTENTIOMETER 10K OHM REPLACEMENT 1 Shut power off at main breaker 2 Remove control panel top and front cover 3 Remove the access cover 4 Loosen two 2 allen screws and remove knob by sliding off shaft 5 Remove mounting nut from potentiometer shaft and push out 6 Unplug wire connector from conveyor control board 7 Reassemble in reverse order and check system operation Recalibrate knob as needed CONVEYOR CONTROL BOARD ASSEMBLY REPLACEMENT 1 Shut power off at main breaker 2 Remove control panel top and front cover 3 Remove two 2 top screws and loosen one 1 bottom screw from control assembly 4 Disconnect wiring Push on connectors from control board note proper location of connectors for reinstallation and exchange boards on the mounting bracket before reinstallation 5 Reassemble in reverse order and check system operation NOTE Control boards are calibrated at the factory and no board adjustment is required CONVEYOR DRIVE MOTOR REPLACEMENT 1 Shut power off at main breaker
54. usings on the right side of the oven If no pilot flame is visible check pilot shut off valve Pilot Shut off Valve Check to see that pilot shut off valve is open shut off valve is located between valve assembly and burner Pilot Tube Check for gas pressure at pilot tube Disconnect pilot tube at burner and connect manometer to pilot tube If no gas pressure is present check for blockage in pilot tube or pilot shut off valve If these are clear and there is gas supplied to the oven replace the gas valve pilot orifice for obstructions Replace as needed Burner Igniter Check the burner igniter head for any obstructions also check for frayed or broken wire spark gap 100 in 2 5 mm If there is visible damage replace igniter assembly Ignition Control If there is a pilot flame check for 24 VAC across terminals 1 and the ground main valve If there is no voltage present replace the ignition control NOTE The Honeywell ignition control has a 15 sec lockout built in If pilot flame is not proven turn off switch wait 30 sec and restart If power is supplied to terminal 1 but there is no main flame verify that the main valve internal to valve assembly has opened Connect a manometer to the manifold gas pressure tap located on the back of the valve assembly If no gas is present replace valve assembly Check for temperature control set above 300 F Main Orifice Check for blockage of main orifice If there is no I ERN

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