Lincoln Dual Technology Finisher 1921 Service Manual Download

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DTFsvcman

REV 1/5/07

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

Summary of Contents for Dual Technology Finisher 1921

Page 1: ...INISHER 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 Techn...

Page 2: ...The thermocouple will provide varying millivolts to the oven control The oven control supplies 208 240VAC to the coil of the heater relay at intermittent intervals to maintain the desired temperature...

Page 3: ...DTF 1920 Series Service Manual 3 SCHEMATIC DIAGRAM MODEL 1921 S N 8001207 and Below...

Page 4: ...DTF 1920 Series Service Manual 4 SCHEMATIC DIAGRAM MODEL 1922 S N 8001207 and Below...

Page 5: ...DTF 1920 Series Service Manual 5 SCHEMATIC DIAGRAM MODEL 1921 1922 S N 8001208 and Above...

Page 6: ...for supply voltage to the coil of the main fan relay If no voltage is present trace wiring back to the 30 minute time delay relay If voltage is present check to insure contacts are closing Replace as...

Page 7: ...be sure that the thermocouple is securely connected to the oven control If the thermocouple is connected to the oven control and the control indicates PROBE FAIL disconnect the thermocouple from the...

Page 8: ...OFF To check resistance of the elements remove all leads from the elements and use a digital multimeter The element resistance should be as follows 208V 45 ohms approx 240V 58 ohms approx Replace hea...

Page 9: ...he motor windings as follows Grey to black 236 ohms approx Grey to brown 236 ohms approx Brown to black 472 ohms approx If any of the above fails replace conveyor motor Capacitor conveyor motor Check...

Page 10: ...motor from motor mount 6 Reassemble in reverse order and test for proper operation MAIN FAN REPLACEMENT See MOTOR MAIN FAN above SWITCH ON OFF SWITCH STANDBY REPLACEMENT 1 Shut off power at main break...

Page 11: ...in breaker 2 Remove rear cover 3 Remove wires from appropriate heater relay and mark wires for reassembly 4 Remove mounting screws from heater relay and remove heater relay 5 Reassemble in reverse ord...

Page 12: ...r at main breaker 2 Remove control box top Remove tube from air pressure switch 3 Remove wiring from air pressure switch and conveyor motor capacitor and mark all wiring for reassembly 4 Remove two sc...

Page 13: ...ews and remove heating element 5 Reassemble in reverse order and check system operation HEATING ELEMENT INFRARED REPLACEMENT 1 Shut off power at main breaker 2 Remove conveyor and lower finger assembl...

Page 14: ...w control is installed the control will need to be initialized To initialize the new control press and hold the two center buttons on the front control panel After the oven starts release the buttons...

Page 15: ...DTF 1920 Series Service Manual 15 This page intentionally left blank...

Page 16: ...r right Marked RS E 370445 Front element cover F 370446 Front cover G 370447 Finger cover upper H 370442 Columnating plate upper I 370439 Finger housing upper J 370448 Air wash panel upper K 370449 Ai...

Page 17: ...DTF 1920 Series Service Manual 17...

Page 18: ...pring compression E 369413 Drive key F 369410 Coupling sleeve G 370106 Washer H 350259 Screw I 370458 Heating element Infrared 208VAC 370460 Heating element Infrared 240VAC J 370462 Motor conveyor K 3...

Page 19: ...DTF 1920 Series Service Manual 19...

Page 20: ...nd Above G 370468 Cover heating element H 370471 Cooling fan I 370472 Air switch tube assy J 369427 Transformer control K 370459 Heating element 208VAC 370461 Heating element 240VAC L 369479 Relay Hea...

Page 21: ...DTF 1920 Series Service Manual 21...

Page 22: ...370478 Crumb pan left C 370440 Frame conveyor D 370479 Belt conveyor E 370480 Bracket conveyor bearing F 370481 Flanged bearing conveyor G 370482 Shaft idler H 369515 Drive sprocket I 369952 Connectin...

Page 23: ...veyor D 370479 Belt conveyor E 370480 Bracket conveyor bearing F 370481 Flanged bearing conveyor G 370482 Shaft idler H 369515 Drive sprocket I 369952 Connecting link conveyor three required J 370483...

Page 24: ...DTF 1920 Series Service Manual 24...

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