Lincoln Dual Technology Finisher 1921 Service Manual
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Lincoln Dual Technology Finisher 1921 Service Manual

Lincoln Dual Technology Finisher 1921 Service Manual

1920 series dual technology finisher 208vac 60 hz. 3 phase & 240vac 60 hz. 3 phase
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SERVICE MANUAL
DUAL TECHNOLOGY FINISHER
MODEL 1920 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
www.lincolnfp.com
DTFsvcman
REV 1/5/07

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Summary of Contents for Lincoln Dual Technology Finisher 1921

  • Page 1 SERVICE MANUAL DUAL TECHNOLOGY FINISHER MODEL 1920 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 www.lincolnfp.com...

  • Page 2: Sequence Of Operation

    SEQUENCE OF OPERATION 208VAC 60 HZ. 240VAC 60 HZ. Electrical power to be supplied to the oven by a four conductor service for three phase. Black conductor is hot. Red conductor is hot. Orange conductor is hot Green conductor is ground.
  • Page 3 SCHEMATIC DIAGRAM MODEL 1921 S/N 8001207 and Below DTF – 1920 Series Service Manual...
  • Page 4 SCHEMATIC DIAGRAM MODEL 1922 S/N 8001207 and Below DTF – 1920 Series Service Manual...
  • Page 5 SCHEMATIC DIAGRAM MODEL 1921 / 1922 S/N 8001208 and Above DTF – 1920 Series Service Manual...

  • Page 6: Troubleshooting Guide

    Terminals are normally closed. If open, reset Oven cavity thermostat and retest. If thermostat will not hold for maximum oven temperature, and oven is not exceeding temperature setting, check for proper location of capillary bulb in its spring holder. If the capillary checks okay, replace the hi-limit thermostat.
  • Page 7 With the control set at maximum temperature, check for supply voltage to the oven control at terminals J3-12 and J3-3. If there is no voltage present, trace wiring back to the air pressure switch. If there is voltage present, check for output voltage at the Main heater relay (R1).
  • Page 8 Check, replace if necessary. Fuse holder Check, replace if necessary. Hi-limit thermostat, oven cavity Terminals are normally closed. If open, reset thermostat and retest. If thermostat will not hold for maximum oven temperature, and oven is not exceeding temperature setting, check for proper location of capillary bulb in its spring holder.
  • Page 9 Check for supply voltage to the primary of the control transformer. If no voltage is present, trace wiring back to the oven power relay. If voltage is present, check for 24 VAC at the transformer secondary. If there is primary voltage but no secondary voltage, replace control transformer.

  • Page 10: Removal, Installation And Adjustment

    Remove front plenum assembly. Measure location of main fan on motor shaft for reassembly. Loosen two set screws and remove main fan from motor shaft. Remove oven top and rear cover. Disconnect wiring from motor. Remove motor and motor mount assembly from back of oven.
  • Page 11 CIRCUIT BREAKER, MAIN MOTOR - REPLACEMENT Shut off power at main breaker. Remove rear cover. Remove wires from appropriate circuit breaker and mark wires for reassembly. Remove mounting nut from circuit breaker and remove circuit breaker. Reassemble in reverse order and check system operation. Be sure to reset circuit breaker before operation.

  • Page 12: Air Pressure Switch - Replacement

    Shut off power at main breaker. Remove control box top. Remove rear cover. Remove right side heating element cover. Remove mounting screws and remove thermocouple from oven cavity. Disconnect thermocouple from main control, remove thermocouple. Remove connector plug from new thermocouple and mark wires for reassembly. Install thermocouple and reassemble plug connector.
  • Page 13 HEATING ELEMENT, INFRARED – REPLACEMENT Shut off power at main breaker. Remove conveyor and lower finger assemblies. Remove front conveyor support from oven cavity. Remove front cover and heating element cover. Disconnect wiring from heating element and mark wires for reassembly.
  • Page 14 To initialize the new control, press and hold the two center buttons on the front control panel. After the oven starts, release the buttons, the control is now initialized. Reassemble in reverse order and check system operation.
  • Page 15 This page intentionally left blank. DTF – 1920 Series Service Manual...

  • Page 16: General View

    GENERAL VIEW MODEL 1921, 1922 370438 Finger housing, lower 370441 Columnating plate, lower 370443 Finger cover, lower left. Marked ‘LS’ 370444 Finger cover, lower right. Marked ’RS’ 370445 Front element cover 370446 Front cover 370447 Finger cover, upper 370442 Columnating plate, upper 370439 Finger housing, upper 370448...
  • Page 17 DTF – 1920 Series Service Manual...
  • Page 18 CONTROL BOX VIEW MODEL 1921, 1922 369432 Switch, on/off 370456 Label, control panel 370457 Front panel 369460 Spring, compression 369413 Drive key 369410 Coupling sleeve 370106 Washer 350259 Screw 370458 Heating element, Infrared – 208VAC 370460 Heating element, Infrared – 240VAC 370462 Motor, conveyor 370383...
  • Page 19 DTF – 1920 Series Service Manual...
  • Page 20 Not shown REAR VIEW MODEL 1921, 1922 370466 Timer, cool down, 30 minute 369422 Relay, main fan 370467 Thermocouple 370468 Cover, heating element 370469 Motor mount 370470 Motor, main fan S/N 8001207 and Below 4060485 Motor, main fan S/N 8001208 and Above 370468 Cover, heating element 370471...
  • Page 21 DTF – 1920 Series Service Manual...
  • Page 22 Not shown CONVEYOR MODEL 1921, 1922 S/N 8001199 and Below 370477 Crumb pan, right 370478 Crumb pan, left 370440 Frame, conveyor 370479 Belt, conveyor 370480 Bracket, conveyor bearing 370481 Flanged bearing, conveyor 370482 Shaft, idler 369515 Drive sprocket 369952 Connecting link, conveyor (three required) 370483 Shaft, drive 369471...
  • Page 23 Not shown DTF – 1920 Series Service Manual CONVEYOR MODEL 1921, 1922 S/N 8001200 and Above 370477 Crumb pan, right 370478 Crumb pan, left 370529 Frame, conveyor 370479 Belt, conveyor 370480 Bracket, conveyor bearing 370481 Flanged bearing, conveyor 370482 Shaft, idler 369515 Drive sprocket 369952...
  • Page 24 DTF – 1920 Series Service Manual...

This manual is also suitable for:

1922

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