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SERVICE MANUAL
(DOMESTIC)
IMPINGER CONVEYOR OVENS
MODEL 1450,1451
WITH PUSH BUTTON CONTROLS
Lincoln Foodservice Products, Inc.
1111 North Hadley Road
P.O. Box 1229
Fort Wayne, Indiana 46801-1229
Phone: (800) 374-3004 • Fax: (260) 436-0735
Technical Service Hot Line
(800) 678-9511
www.lincolnfp.com
1450digservice REV 12/6/05
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SEQUENCE OF OPERATION IMPINGER ADVANTAGE SERIAL NUMBER N28654 AND ABOVE (OVENS WITH PUSH BUTTON CONTROLS) MODEL 1450 120VAC 60 HZ. NAT. GAS MODEL 1451 120VAC 60 HZ. LP GAS POWER SUPPLY Electrical power is supplied to the oven by a three conductor cordset. Voltage from the black conductor to the white conductor is 120VAC. The white conductor is neutral. The green conductor is ground. CONTROL BOX AUTO When the temperature in the control box reaches 120°F ± 3° (48.9
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SCHEMATIC DIAGRAM MODEL 1450, 1451 SERIAL NUMBER N28654 AND ABOVE Impinger I – 1450 Series Service Manual - Domestic 3
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TROUBLESHOOTING GUIDE IMPINGER ADVANTAGE GAS OVENS SERIAL NUMBER N28654 AND ABOVE (OVENS WITH PUSH BUTTON CONTROLS) SYMPTOM POSSIBLE CAUSE EVALUATION Oven fan will not run Incoming power supply Check circuit breaker, reset if required. Check power plug to be sure it is firmly in receptacle. Measure incoming power, call power co. if needed. Fuse, 10 Amp Check, replace if necessary. Fuse holder Check, replace if necessary. Switch, oven power Check for 120VAC supply to switch. If no voltage is pres
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not running, check for opens, shorts or grounds. WITH POWER OFF: Turn motor to check for locked rotor. Replace burner blower motor as needed. Burner transformer Check for 120VAC supplied to primary of burner transformer. If no voltage is present, trace wiring back to centrifugal switch of main fan motor. If voltage is present, check for 24VAC supply at transformer secondary. If there is primary voltage but no secondary voltage, replace burner transformer. Centrifugal switch of burner Check for 2
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the display, replace oven control. If there is a read-out on the control, set the control to maximum temperature (see Installation operations manual for temperature adjustment). With the control set at maximum temperature, check for 120VAC at the temperature regulation valve. If there is voltage at the temperature regulation valve, proceed to “Temperature regulation valve” for next check. If there is no voltage at the temperature regulation valve, trace wiring back to the oven control. If there
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Control transformer Check for 120VAC supply to the primary of the control transformer. If no voltage is present, trace wiring back to the oven power switch. If voltage is present, check foe 24VAC at the transformer secondary. If there is primary voltage, but no secondary voltage, replace control transformer. Conveyor motor Check for 120VAC supply to conveyor motor at wire #6 to neutral. If no voltage is present, trace wiring back to oven power switch. If voltage is present and motor will not run
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REMOVAL, INSTALLATION & 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 - REPLACEMENT 1. Shut off power at main breaker. 2. Remove louvered motor cover from back of oven. 3. Remove wireway 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.
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THERMOSTAT, COOLING FAN - REPLACEMENT 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. 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 in
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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 f
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BURNER IGNITOR - REPLACEMENT 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 ignitor. 6. Reassemble in reverse order (spark gap approx. .100 in. or 2.5 mm) NOTE: Be sure to reconnect burner ignitor cable to ignition control. THERMOCOUPLE - REPLACEMENT 1. Shut off power at main breaker. 2. Remove control panel top and front cover. 3. Slide thermocoupl
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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 oven switch. 2. Set conveyor reversing switch in the other position. 3. Turn oven “on” and check for proper operation. MAIN ORIFICE - REPLACEMENT 1. Shut off power at main breaker. 2. Remove control panel top and front panel. 3. Remove gas control valve assy. 4. Remove two (2) nuts from burner orifice bracket
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GENERAL VIEW ADVANTAGE SERIES LETTER PART NUMBER DESCRIPTION A 369003 Door hinge B 369110 Access window assembly C 369337 Retainer (old style) 369929 Retainer (new style) D 369828 Handle spacer E 369209 Latch & strike F 369310 Screw, 6-32 x 3/16” G 369308 Bottom, access window H 369334 Access door glass J 369309 Top, access window K 350638 Handle L 369311 Handle spacer (2 req.) M 369336 Door latch N 369906 Screw, 8-32 x 5/8” O 370110 Door assembly (solid) P 369157 Door assembly (with window) Q 1
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CONTROL BOX – 1450, 1451 S/N N28654 and ABOVE LETTER PART # DESCRIPTION A 369263 Gas Valve B 369344 Pilot Shut Off Valve C 369398 Solenoid Valve Nat/LP D 370059 Manifold, Burner E 369072 Main Orifice, Nat. 369099 Main Orifice, L.P. F 369144 Pilot Shield Extension G 369202 Pilot Shield, Main H 369076 Burner Igniter I 369075 Flame Sensor J 369142 Flame Target K 369366 Burner Blower Motor L 369399 Air Shutter M 369400 Plate, Air Shutter N 370362 Thermocouple, Type K O 370368 Conveyor Motor P 369158
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OVEN BACK ADVANTAGE SERIES GAS AND ELECTRIC LETTER PART NUMBER DESCRIPTION A 369808 Cover, motor (gas ovens) 370140 Cover, motor (electric ovens) B 369800 Motor, main fan (60 Hz.) 369214 Motor, main fan (50 Hz.) C 369033 Motor clamp D 369215 Motor support assembly E 369192 Capacitor, 7.5 MFD F 369306 Oven back assembly, gas oven G 369646 Stand-off H 369647 Inlet panel J 369213 Main fan K 369547 Bracket, thermostat M 369287 Heating element, 208V 369315 Heating element, 220V 369122 Heating element
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CONVEYOR 1450 SERIES LETTER PART NUMBER DESCRIPTION 369830 Complete conveyor assembly A 369816 Conveyor belt 370092 Conveyor belt, 1 foot section B 369825 Retaining ring C 369813 Conveyor bearing block D 369314 Roll, conveyor, notched E 369812 Conveyor idler shaft F 369160 Conveyor pan stop G 369814 Connecting link H 369811 Conveyor drive shaft J 369161 Roller chain sprocket K 369806 Crumb pan L 370050 Conveyor frame M 369162 Drive chain 20 Impinger I – 1450 Series Service Manual - Domestic
