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SERVICE MANUAL
(INTERNATIONAL)
IMPINGER CONVEYOR OVENS
LOW PROFILE 1600 INTERNATIONAL ADVANTAGE
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
1600expadv REV: 1/8/07
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SERVICE AND PARTS MANUAL 1600 INTERNATIONAL ADVANTAGE SEQUENCE OF OPERATIONS .............................................................................................. 3 SCHEMATIC............................................................................................................................ 5 TROUBLESHOOTING GUIDE ................................................................................................ 6 REMOVAL, INSTALLATION & ADJUSTMENTS.........................
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SEQUENCE OF OPERATIONS MODEL 1633-000-EA 230 VAC 50HZ NATURAL GAS MODEL 1634-000-EA 230 VAC 50HZ L.P. GAS POWER SUPPLY Electrical power 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 COOL DOWN When the temperature in either one of the control boxes reaches 120°F ±3° (49°C ± 1.7° ) , the cooling fan thermostats will switch power to the cooling fans
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Adjustments 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 motor speed. Any change in motor load ( ± RPM ) is detected by the sensor and the voltage to the motor is adjusted accordingly. TEMPERA
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SCHEMATIC MODELS 1633-000-EA AND 1634-000-EA Low Profile – 1600 Advantage Series Service Manual – International 5
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TROUBLESHOOTING GUIDE MODEL 1633-000 EA NATURAL GAS 230 VAC 50 HZ 1 PHASE MODEL 1634-000-EA L.P. GAS 230 VAC 50 HZ 1 PHASE NOTE: When checking components on left side of unit, be sure to check for proper connections in power connector, ( marked P. C. on schematic diagram ) located inside motor cover. SYMPTOM POSSIBLE CAUSE EVALUATION Oven fan will Incoming power supply Check
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Fuse holder Check, replace if necessary. Gas pressure switch Check for supply voltage to neutral (internal to gas valve) on both sides of switch. If voltage is present on one side of switch only, check the following. Check for proper gas pressure supply to gas valve.(Marked on oven spec. plate.) Check for proper adjustment of gas pressure switch. should be set at 10 Nat., 27 for L.P. or 4.5 for town gas. Check
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replace the spark generator. If there is visible damage to the igniter/sensor assembly, replace. Also check for frayed or damaged wires in burner tube. Gas valve Check for supply voltage to gas valve. If there is no voltage present, check reset button, check all connections for tightness. If there still is no voltage at gas valve, replace ignition control. If there is voltage present, check for ga
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as needed. Temperature regulation If supply voltage is present on the valve temperature control board at the load terminals #7 and #8, 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 if required. Intermittent heating Thermal overload of The main fan motors and the burner main fan and burner blower motor
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gear motor 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 gearbox (use care so magnet and Hall Effect sensor board are not
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secondary readings are not achieved, replace transformer. Temperature display If proper voltage is present at terminals 1,2, and 3 on temperature display, but but the display is not lighted, recheck all connections for tightness. If temperature display is still not operating, replace the temperature display. Temperature display Thermocouple Connect the thermocouple of a Inaccurate, erratic pyrometer to the thermocoup
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REMOVAL, INSTALLATION & ADJUSTMENTS MODEL SERIES 1633-000-EA, 1634-000-EA CAUTION ! BEFORE REMOVING OR INSTALLING ANY COMPONENT IN THE IMPINGER OVEN BE SURE TO DISCONNECT ELECTRICAL POWER AND GAS SUPPLY. IGNITION CONTROL – REPLACEMENT A. Remove appropriate control box cover. B. Remove front portion of relay by releasing tabs on side pulling straight out (rocking motion). C. Remove wires from plug-in terminal strip, note wire numbers and location. D. Remove two screws from mount
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CONVEYOR CONTROL BOARD – CALIBRATION A. 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 affect sensor lead. B. Turn conveyor control knob fully counter clockwise. Loosen knob and align with calibration line and tighten knob. C. Set knob to 2 minute setting. Adjust “max” pot. On conveyor control to 219 Hz. D. Set control knob to 20 minute setting, and adjust “min” pot. On conveyor control to 21.9
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F. Disconnect pipe union just above gas valve and remove assembly. G. Reassemble in reverse order (check all pipe fittings for leaks ). After assembled check for proper adjustment of gas pressure switch, 10 on dial for natural gas, 27 for L.P. gas, and 4.5 for town gas. H. 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 c
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E. Remove assembly and replace main orifice. F. Reassemble in reverse order and check system operation. NOTE: Check all gas line fittings for leaks. TEMPERATURE CONTROL POTENTIOMETER – REPLACEMENT A. Remove control box cover. B. Loosen screw and slide knob off potentiometer shaft. C. Remove lock nut and push out. D. Remove 3 wires from electronic temperature control, note wire color and location for reinstallation. E. Reassemble in reverse order and check system operation. THE
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CAPACITOR, MAIN FAN MOTOR – REPLACEMENT A. Remove appropriate control box cover. B. Remove 2 wires from capacitor, note wire number and location. C. WARNING: Capacitor has a stored charge, discharge before handling or testing. D. Cut 2 tyraps securing capacitor to base and replace. E. Reinstall in reverse order and check system operation. RELAY – REPLACEMENT A. Remove control box cover. B. Remove wires from relay, note wire numbers and location for reinstallation. C.
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H. ( note location of fan blade for reinstallation ) I. Loosen lock nuts on cone. Remove 2 mounting bolts and remove motor from J. back assembly. K. Remove 4 hex head screws from motor mount bracket. Remove motor mount from motor and reinstall on new motor. L. Reassemble in reverse order. M. NOTE: 1. Make sure motor is centered in back housing. N. 2. Verify c
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The following chart lists the thermocouple millivolt readings from 200°F to 600°F. 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 3.26 4.77 6.30 7.06 7.83 9.37 10.14 10.91 12.46 14.00 15.53 J U 88°F 3.32 4.83 6.36 7.12 7.89 9.43 10.20 10.97 12.51 14.05 15.59 86°F 3.37 4.88 6.41 7.17 7.94 9.49 10.26 11.03 12.57 14.11 15.65 N 84°F 3.43 4.94 6.47 7.23 8.00 9.54 10.31 11.09 12.63 14.19 15.71 C 82°F 3.49 5.00 6.53 7.29 8.06 9.60 10.37
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GENERAL PARTS ADVANTAGE SERIES LETTER PART # DESCRIPTION A 369110 Access window assembly B 369929 Window retainer C 369926 Window frame bottom D 369925 Glass, access window E 369927 Window frame, top F 369930 Screw, 10-32x1/4 G 369211 Thumb screw H 369058 Baffle I 370253 Drive cover, L.H. J 1609 Oven top K 370252 Drive cover, R.H. L 369745 Hinge assy., right M 369723 Door assy., small N 369783 Latch, spring O 369717 Fi
