Lincoln 1628-000-A Convection Oven User Manual
Contents
1. 1 PP Pd m 1 ee lt 105102 NIAC Av138 E 1 HOLIAS 34188334 2S4V SdN Gd Sf AE ad 9f m 7 as ugar es il 1 es ee ale i oe ae wv 05 m e x lt rn lt gt 4 ari E arcs Qf 2734 Q3431A Pr 3015 1H9I3 vay 03H31A 3015 1431 NOILISOd 1 3 OL I 2 HOLIMS rif zzi we td 40 oU Mi j is 3933A38 Ol 310N Ele a 1 2 45 1 9g ref ze Ss un i We X X ob e e L 0l zuos 621 su ezi Ili pi Kil OL zarfe S E W3dH f 39Y110A ZHOS uas MS HOON 13 JION 0 d 4 4 i Or ord d 1081909 19211910 E sey au ot Low Profile 1600 Series Adv Dig Electric S M Int l TROUBLESHOOTING GUIDE MODEL 1621 000 EA 230 400 VAC 50HZ 3 PHASE MODEL 1628 000 A 220 380 50HZ PHASE MODEL 1629 000 A 240 415 50HZ 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 CAU2. ACC gt PART 369830 369002 369362 369314 2114003 369812 369160 369641 369220 369005 369811 369161 369813 369825 3 0247 3 0050 369806 369163 CONVEYOR 1621 000 EA 1628 000 A 1629 000 A DESCRIPTION Complete conveyor Knob conveyor tension Belt 1ft section 32 inch wide belt Roll conveyor notched nut hex Conveyor idler shaft Conveyor pan stop Bracket idle bearing Bearing idle Connecting link 32 inch wide belt Conveyor drive shaft Roller chain sprocket Conveyor bearing block Retaining ring Drive chain Conveyor frame Crumb pan Conveyor belt complete 32 inch wide belt Low Profile 1600 Series Adv Dig Electric S M Int l CONVEYOR VIEW Low Profile 1600 Series Adv Dig Electric S M Int l 23 24 pU S Lincoln A XA SERVICE AND PARTS Low Profile 1600 Series Adv Dig Electric S M Int l
3. Q 369501 Latch R 369328 Leg S 369030 Caster High stand 369390 Caster Low stand T 370167 Baffle air return U L L R S N 35950 amp below 370663 Baffle air return U L S N 35951 amp above U 370166 Baffle air return U R L L S N 35950 amp below 370662 Baffle air return U R S N 35951 amp above V 370168 Finger housing T 1 T 3 B 2 B 4 S N 35950 amp below 370665 Finger housing T 1 T 3 B 2 B 4 S N 35951 amp above 370169 Finger housing T 2 T 4 B 1 B 3 S N 35950 amp below 370664 Finger housing T 2 T 4 B 1 B 3 S N 35951 amp above W Columnating plates see Installation Operations manual X 369707 Finger cover Y 369740 Handle assy Z 369718 Door assy large AA 369931 Screw 8 32x3 8 BB 369746 Hinge assy Units from S N 35951 and above DO NOT contain lower Air Return Baffles These units only contain a total of two 2 Air Return baffles which are placed above the top finger assemblies These parts have minor changes not shown in the exploded view drawing on page 15 Low Profile 1600 Series Adv Dig Electric S M Int l GENERAL VIEW Low Profile 1600 Series Adv Dig Electric S M Int l T Lo mm Lo ro n og a om CONTROL BOX RIGHT 1621 000 EA 1628 000 A 1629 000 A LETTER PART A 9004646 B 369767 369792 369769 C 7004973 D 369025 E 3 0361 F 369119 G 369134 H 370117 369378 J 369766 369793
4. there is primary voltage but no secondary voltage replace control transformer Oven control Check for 24VAC supply to control If no voltage is present trace wiring back to control transformer If 24VAC is present check for a read out on the control display If there is 24VAC supplied but there is no read out on the control display replace the 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 line voltage at the heat relay mercury contactor If there is voltage at the heat relay proceed to Heat relay for next check If there is no voltage at the heat relay trace wiring back to the oven control If there is no voltage output at the oven control check the read out on the control If the control reads LP FAIL or RP FAIL this indicates that the thermocouple has failed or has become disconnected from the control LP FAIL indicates a problem with the left thermocouple probe and RP FAIL indicates a problem with the right thermocouple probe Low Profile 1600 Series Adv Dig Electric S M Int l 5 Thermocouple probe Oven control Thermocouple Oven control Oven air pressure switch Heat relay Heating elements OD Check to be sure that the thermocouple is securely connected to the oven control If the thermocouple is connecte
5. trace wiring back to the air pressure switch If voltage is present check to be certain that all of the contacts are closing when the relay is energized Also check for opens or shorts in the operating coil Replace temperature regulation valve as needed Check the Amp draw on each power lead for proper load Check the specification plate for proper rating information If the Amp draw is high or low check the individual heating elements for opens shorts and proper resistance To check the resistance of the elements TURN OFF THE POWER Remove all wiring from the heating elements and use an accurate digital meter The element resistance should be as follows 220V 29 ohms approx 230V 320hms approx 240V 34 ohms approx If all readings are not correct replace heating elements as needed Low Profile 1600 Series Adv Dig Electric S M Int l Intermittent heating Thermal overload of main fan motor s The main fan motors are equipped with internal thermal protection and will cease to operate if overheating occurs As the motors overheat and then cool this will cause the units to cycle on and off intermittently Improper ventilation or lack of preventive maintenance may cause this problem Also most of the problems listed under Oven will not heat can cause intermittent failure run voltage is not present check breakers switch as needed Hi limit thermostat s Check for voltage on both si
6. motor cover and remove oven back to access thermocouple NOTE Removal of oven back assy Is required to replace thermocouples C Remove thermocouple from wire form in oven chamber and remove from chamber NOTE R H thermocouple viewed from front is connected directly to the temperature control board remove 2 wires make note of wire colors and location When changing L H thermocouple viewed from front the back motor cover must also be removed to gain access to the thermocouple connector plug D Reassemble in reverse order making sure bulb is placed securely in the wire form in the oven chamber E Check system operation recalibrate as needed NOTE The R H and L H thermocouples have different connectors on the wire ends and must be ordered accordingly THERMOCOUPLE MEASUREMENT TEMPERATURE F D C MILLIVOLTS 200 2 8 250 4 0 300 5 1 350 6 0 400 7 1 450 8 2 900 9 3 950 10 4 600 11 5 Low Profile 1600 Series Adv Dig Electric S M Int l 11 12 TIME DELAY RELAY REPLACEMENT Shut off power at main breaker Remove control box cover Remove all wires from time delay relay note wire numbers and location for reinstallation Remove mounting screw and remove time delay relay Reassemble in reverse order and check system operation MOO gt HEATING ELEMENT REPLACEMENT A Shut off power at main breaker B Remove appropriate control box cover C Remove wires from heating elemen
7. will toggle choices between F or C After desired scale is selected allow control to go into normal run mode These special promps are for Prom chips 007 and above Prom chips 006 and below the Sub Level program can be entered by pressing the two right buttons only 5 Set bake time and oven temperature Set Point Menu B A Press and hold the 2 LH buttons to enter Set Point program set point program press temp button and adjust temperature using up or down arrows Press time button while still in set point program and adjust time using up or down buttons Pressing time or temp button will show what that respective setting is Once desired settings are programmed allow control to go into normal running mode B For normal calibration set bake time to 10 00 and temperature to 500 F 260 C Bake time can be checked using standard QA procedures Install cavity temperature probes per standard QA procedures 6 Adjusting temperature offset Sub Set Point Menu A Follow the instructions in Step 4 to enter the Sub level program After Sub Set Point is displayed pressing the temp button will access the following temperature features SCALE F or C HI TEMP LOW TEMP OFFSET or MANUFACTURE MODE Clear or Active not change SCALE after it was set in step 4A or settings will reset to default values B To adjust the temperature offset access the OFFSET display in the Sub Set Point Menu If cavity tem
8. 369768 K 7004970 L 370251 M 7002976 N 369192 O 370485 P 369368 R 357107 S 369013 369014 357107 T 369431 U 369507 V 3 0241 X 3 0360 Z 7005624 AA 370256 AB 369125 AC 369422 AD 370180 AE 370354 AF 370355 AG 369432 AH 370257 AJ 369158 Not shown 370357 Not shown 370466 16 DESCRIPTION Control Box Front RH Firebar Element Bottom 220V Firebar Element Bottom 230V Firebar Element Bottom 240V Mounting Plate Bottom Switch Blower Air Motor Assembly L P CE ADV Fuse holder 3 Pole Fuse 50 A Terminal Block 5 Pole Cooling Fan Motor 230VAC Firebar Element Top 220V Firebar Element Top 230V Firebar Element Top 240V Mounting Plate Top Top Assembly RH Capacitor Bracket Capacitor Contactor Mercury 3P Thermostat oven cavity hi limit Fuse Holder Fuse 3 Amp Fuse 10 Amp Fuse holder Thermostat control box hi limit Thermostat cooling fan Transformer 240V 24V Capacitor 230V Digit Bracket Component Assembly Panel Side Control RH Terminal Block 2 Pole Relay Fan 240V Filter EMI Bush Button Facia Digital Control Board Switch Rocker Lighted Bracket Gearmotor Mount Sprocket 10 Tooth Thermocouple right Timer cool down 20 minute Low Profile 1600 Series Adv Dig Electric S M Int l CONTROL BOX RIGHT VIEW Low Profile 1600 Series Adv Dig Electric S M Int l 18 CONTROL BOX LEFT 1621 000 EA 1628 000 A 1629 000 A LETTER PART DESCRIPTION A 7006233 Control Box B
9. SE EVALUATION o Oven fan will not Incoming power supply Check breakers reset if required call Power company run if needed Filter Power Check for supply voltage to filter If there is no voltage trace wiring back to fuse holder If there is power in to the filter but no power out replace the filter 20 minute time delay relay Check for supply voltage to terminal 1 and 3 if there is no voltage trace wiring back to the power filter If voltage is present check for supply voltage at terminals 3 to 6 if no voltage is present trace wiring back to on off switch If there is voltage at 3 and 6 check for voltage at terminals 1 and 2 of there is no voltage at Terminals 1 and 2 replace the 20 minute time delay relay Relay main fan motors Check for power to coil of motor relay If no voltage is present trace wiring back to 20 minute time delay relay Check for supply voltage to the contact of the relay If no voltage is present trace wiring back to power filter If voltage is present at the relay coil check to insure the contacts are closing Replace relay as needed Hi limit thermostat s control Terminals are normally closed if open reset box thermostat and test oven for proper operation If it will not reset replace thermostat No main fan cool down 20 minute time delay relay Check for supply voltage at terminals 1 and 2 while is ON Turn OFF the main fan switch supply voltage sho
10. SERVICE MANUAL INTERNATIONAL IMPINGER CONVEYOR OVENS MODEL 1621 000 EA 1628 000 A 1629 000 A WITH PUSH BUTTON CONTROLS JD 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 Intl Fax 260 436 0735 Technical Service Hot Line 800 678 951 1 www lincolnfp com C STAR CERTIFIED SERVICE AND PARTS 1600AdDgElecExp REV 1 8 07 SEQUENCE OF OPERATIONS IMPINGER ELECTRIC LOW PROFILE ADVANTAGE WITH PUSH BUTTON CONTROL MODEL 1621 000 EA 230 400 VAC 50HZ MODEL 1628 000 A 220 380 VAC 50HZ MODEL 1629 000 A 224 415 VAC 50HZ POWER SUPPLY Electrical power to be supplied to the oven by a five conductor service Brown conductor is hot Black conductor is hot Black conductor is hot Blue conductor is neutral Green conductor is ground CONTROL BOX When the temperature in either one of the control boxes reaches 120 F 3 49 C AUTO COOL DOWN 1 75 the cooling fan thermostats will switch power to the cooling fans The thermostats will interrupt power to the cooling fans when the temperature falls to 100 F 3 37 MAIN FAN CIRCUIT Line voltage is permanently supplied through a power filter to a normally open contact of the oven power switch Line voltage is permanently supplied to the two normally open cooling fan thermostats Closing the oven power switch supplies line voltage th
11. UMPER SETTING FOR 120V or 240V AND THE 50 HZ 60HZ JUMPER SETTING IS CORRECT JUMPERS ARE LOCATED AT BOTTOM CENTER OF CONTROL BOARD 3 Set digital control for proper oven cavity and conveyor belt during power up A Single Cavity Ovens Impinger or 11 Press and hold the 2 inside buttons while turning the power switch on After Imp or Il is displayed release the buttons and control will request the conveyor belt setting Imp or Lo Pro or Imp Il The up or down button will toggle between these choises When desired conveyor belt is selected press the temp button to store settings B Dual Cavity Ovens Impinger Low Profile Press and hold the 2 outside buttons while turning the power switch on After Imp Lo Pro is displayed release the buttons and control will request the conveyor belt setting Imp or Lo Pro or Imp Il The up or down button will toggle between these choises After the Imp or Lo Pro conveyor belt is selected press the temperature button to store settings 4 Set digital control for proper temperature scale F or C A Press and hold the 2 RH buttons to enter Sub Level program A prompt will be displayed Technicians Only After a couple seconds a second prompt will say Please Release Buttons After releasing the buttons quickly press the TIME button and the UP button to enter the program After Sub Set Point is displayed press temp button to indicate Scale The up or down buttons
12. ack LH B 370250 Top Assembly LH C 369378 Cooling Fan Motor 280VAC D 3 0495 Bracket Fan RH E 369766 Firebar Element Top 220V 369793 Firebar Element Top 230V 369768 Firebar Element Top 240V F 7004970 Mounting Plate Top G 369767 Firebar Element Bottom 220V 369792 Firebar Element Bottom 230V 369769 Firebar Element Bottom 240V H 7004973 Mounting Plate Bottom 7006234 Control Box Front LH J 369025 Air Switch Blower L 370272 Panel Control Box Side LH M 369507 Thermostat cooling fan N 369431 Thermostat control box hi limit O 7005624 Bracket Component P 370485 Contactor Mercury 3P R 369368 Thermostat oven cavity hi Limit S 7002976 Bracket Capacitor T 369192 Capacitor 7 5 MFD Not shown 370358 Thermocouple left Low Profile 1600 Series Adv Dig Electric S M Int l CONTROL BOX LEFT VIEW Low Profile 1600 Series Adv Dig Electric S M Int l 19 20 OVEN BACK 1621 000 EA 1628 000 A 1629 000 A LETTER PART 369547 369725 369776 Go cO N N 369724 DESCRIPTION Wire form thermostat bulb Fan clockwise rotation Fan shroud Stand off Rear wall assy Motor mount Motor main fan 220 240V 50 Hz Duct cap Motor clamp Rear duct Fan counter clockwise rotation Low Profile 1600 Series Adv Dig Electric S M Int l OVEN BACK VIEW Low Profile 1600 Series Adv Dig Electric S M Int l 21 22 LETTER 2
13. apacitor and reversing switch check good replace Conveyor motor NOTE Display will indicate runs but there is Belt jam the oven control no speed display Oven control Check for output voltage from the oven control to hall effect sensor sensor is located in conveyor motor Measure voltage at the motor connector red wire and yellow wire Voltage should be approx 10VDC If no voltage is present trace wiring back to oven control If there is no voltage present at the oven control replace the oven control Low Profile 1600 Series Adv Dig Electric S M Int l 7 Conveyor motor If there is voltage supplied to the hall effect sensor check for a frequency output from the hall effect sensor Measure frequency across the yellow and white wires at the motor connector Frequency readings should be approx 20 525 Hz If these readings are not achieved replace the conveyor motor If the readings are achieved proceed Oven control If the hall effect sensor readings are correct but there is no speed indicated on the display replace the oven control 8 Low Profile 1600 Series Adv Dig Electric S M Int l REMOVAL INSTALLATION amp ADJUSTMENTS MODEL SERIES 1621 000 EA 1628 000 A 1629 000 A CAUTION BEFORE REMOVING OR INSTALLING ANY COMPONENT IN THE IMPINGER OVEN BE SURE TO DISCONNECT ELECTRICAL POWER AND GAS SUPPLY AIR PRESSURE SWITCH REPLACEMENT Remove control panel top Disconnect wires f
14. assemble in reverse order and check system operation OVEN CONTROL REPLACEMENT A Shut off power at main breaker B Remove control box cover and front panel C Remove all wiring connections and mark for reassembly D Remove oven control by pulling control from mounting pins Remove control from oven E Before installing new control set voltage jumper located at the bottom center of the oven control to the proper 120 240V position Install the four push button extensions included with the oven control by pushing the extensions onto the four set buttons on control Reassemble in reverse order and check system operation oet the oven control for the proper operating mode The 1600 series ovens have dual burner systems The oven control must be set to the Dual oven mode Set control as follows With the oven power switch off depress the temp and down buttons and turn the oven on Control will indicate Low Pro Release the buttons the control will indicate Temp to store Press the temp button The control is now set for dual burner operation Low Profile 1600 Series Adv Dig Electric S M Int l NOTES All bake times should be within 10 seconds of set bake time cavity temperature should be calibrated to within 5 of set temperature For temperature calibration allow oven temperature to stabilize at least for 30 minutes 2 BEFORE APPLYING POWER TO OVEN ENSURE PROPER VOLTAGE J
15. charge before handling or testing Cut 2 tyraps securing capacitor to base and replace Reinstall in reverse order and check system operation RELAY REPLACEMENT TUERI CO AD gt Shut off power at main breaker Remove control box cover Remove wires from relay note wire numbers and location for reinstallation Hemove 2 screws from relay base and replace relay Reassemble in reverse order making sure wire connections are properly seated Check system operation THERMOSTAT COOLING FAN REPLACEMENT EA OI Shut off power at main breaker Remove appropriate control box cover remove rear cover Remove 2 wires from thermostat note wire number and location Remove 2 mounting screws and replace thermostat Reassemble in reverse order and check system operation HIGH LIMIT THERMOSTAT CONTROL BOX REPLACEMENT A B C D E N Shut off power at main breaker Remove appropriate control box cover Remove 2 wires from thermostat note wire numbers and location for reinstallation Remove screws from bracket and remove thermostat Reassemble in reverse order and check system operation OTE Depress reset button to insure thermostat is set for operation Low Profile 1600 Series Adv Dig Electric S M Int l COOLING FAN MOTOR REPLACEMENT Shut off power at main breaker Remove appropriate control box cover Remove 4 mounting screws Unplug electrical connector and remove fan motor Reassemble in reverse
16. d to the oven control and the control indicates LP FAIL or RP FAIL disconnect the thermocouple from the oven control and measure the resistance of the thermocouple The left thermocouple should read approx 21 The right thermocouple should read approx 110 If these readings are not achieved replace the thermocouple If these readings are correct proceed If the thermocouple checks good but the oven control display indicates that there is a thermocouple failure replace the oven control If the oven control indicates a temperature reading but the oven will not heat proceed WITH POWER ON AND THERMOCOUPLE ATTACHED TO THE OVEN CONTROL Measure the DC millivolt output of the thermocouple Refer to the thermocouple chart located in the Removal section of the manual for proper millivolt readings If these readings are not achieved replace thermocouple If the thermocouple checks good but there is no voltage output to the temperature regulation valve replace the oven control If there is voltage output to the heat relay proceed Check for supply voltage at the air pressure switch if no voltage is present trace wiring back to the oven control Check for supply voltage on both sides of switch If voltage is present on one side only check for air tube blockage Adjust air pressure switch If the above fails replace air pressure switch Check for line voltage supplied to the coil of the heat relay If no voltage is present
17. des of the switch control box Terminals are normally closed If open reset and test for proper operation If thermostat will not hold and the control box temperature is not exceeding 140 F replace thermostat Relay oven control Check for line voltage to the relay coil If voltage is not present trace wiring back to the hi limit thermostat If voltage is present check to insure contacts are closing Replace relay as needed Control transformer Check for line voltage supply 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 24VAC at the transformer secondary If there is primary voltage but no secondary voltage replace control transformer Conveyor motor Check for line voltage supply to the conveyor motor at wire 28 to neutral If no voltage is present trace wiring back to the oven power relay If voltage is present and the motor will not run check the motor windings for opens or shorts WITH POWER OFF Check the motor windings as follows Grey to black 116 ohms Grey to brown 116 ohms Brown to black 230 ohms Capacitor conveyor motor Check for shorts or grounds Replace capacitor as needed WARNING Capacitor has a stored charge discharge before testing owitch conveyor reversing Check continuity between switch terminals Replace switch as needed Oven control If there is supply voltage to the motor And the motor c
18. ds WITH POWER OFF Check for locked rotor Oven will not heat 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 NOTE These ovens utilize 2 complete Temperature control systems Each system will Follow the same troubleshooting sequence Oven control relay Check for line voltage to the relay coil If no voltage is present trace wiring back to the control box hi limit thermostat s If voltage is present check to insure contacts are closing Replace relay as needed Thermostat oven cavity hi limit Terminals are normally closed If open reset and test oven for proper operation If thermostat will not hold for maximum oven temperature and oven is not exceeding maximum temperature dial setting check for proper location of capillary bulb in its spring holder If above checks OK replace hi limit Contactor hi limit Check for line voltage to the contactor coil If no voltage is present trace wiring back to the oven cavity hi limit thermostat s If voltage is present check to insure contacts are closing Replace contactor as needed Fuse heater 50A Check replace if necessary Fuseholder Check replace if necessary Control transformer Check for supply voltage to the primary of the control transformer If no voltage is present trace wiring back to the oven control relay If primary voltage is present check for 24VAC at the transformer secondary If
19. eversing switch in the other position C Turn oven on and check for proper operation FUSEHOLDER REPLACEMENT A Shut off power at main breaker B Remove appropriate control box cover Low Profile 1600 Series Adv Dig Electric S M Int l 10 C D E Remove 2 wires note wire number and location Remove locknut on backside of fuse holder and push out Reinstall in reverse order and check system operation THERMOSTAT HIGH LIMIT OVEN CAVITY REPLACEMENT WP Shut off power at main breaker Remove appropriate control box cover Remove motor cover and remove oven back to access high limit thermostat sensing bulb Hemove wires from thermostat note wire numbers for reinstallation Hemove mounting nut from high limit thermostat and remove high limit from oven Heassemble in reverse order Check system operation ON OFF SWITCH POWER REPLACEMENT muUo OO Shut off power at main breaker Remove control box cover Depress spring clips on side of switch and push out Remove wires from back of switch note wire number and location Reassemble in reverse order and check system operation NOTE Make sure switch housing is fully seated in control box housing CAPACITOR MAIN FAN MOTOR REPLACEMENT 25 Shut off power at main breaker Remove appropriate control box cover Remove 2 wires from capacitor note wire number and location WARNING Capacitor has a stored charge dis
20. order and check system operation MAIN FAN MOTOR REPLACEMENT A Shut off power at main breaker B Shut off gas supply and remove gas line and manifold lines from back of oven C Remove screws from motor cover housing and lift off NOTE When ovens are stacked all motor cover housings are fastened together D Unplug power connector E Unplug thermocouple F Unplug 2 motor connectors G Remove 8 bolts from oven back 4 left 4 right and lift out H Remove 1 screw from fan hub and slide fan blade off of motor shaft note location of fan blade for reinstallation Loosen locknuts on cone Remove 2 mounting bolts and remove motor from back assembly J Remove 4 hex head screws from motor mount bracket Remove motor mount from motor and reinstall on new motor K Reassemble in reverse order NOTE 1 Make sure motor is centered in back housing 2 Verify correct location of fan blade and that it is not hitting fan shroud 3 Make sure all connectors are properly seated and making good contact 4 When reinstalling gas manifold across back of oven check all fittings for leaks L Check system operation allow 30 minute preheat for all checks NOTE Position of the fan on the motor shaft will be 1 875 from the top of the oven back cone to the blade spider assembly on the fan hub see drawing below THERMOCOUPLE TYPE K REPLACEMENT A Shut off power at main breaker B Remove control box covers Remove
21. perature is above the set temperature decrease down button the offset value If cavity temperature is below the set temperature increase up button the offset value The amount of offset needed should be the difference between the cavity temp and the set temp Allow oven to reach set temp and verify cavity temperature Readjust offset as necessary C HI TEMP and LOW TEMP are not normally changed unless requested by the customer Accessing these displays and pressing the up or down buttons will change each indicated setting accordingly D MANUFACTURE MODE is not normally used so this feature should be set to clear E While in Sub Set Point Menu pressing the time button will access the following time features HI TIME and LOW TIME These are not normally changed unless requested by the customer Accessing these displays and pressing the up or down buttons will change each indicated setting accordingly Low Profile 1600 Series Adv Dig Electric S M Int l 13 GENERAL 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 36921 1 Thumb screw H 369058 Baffle J 1609 Oven top K 3 0252 Drive cover R H L 369745 Hinge assy right M 369723 Door assy small N 369783 Latch spring O 369717 Finger retaining bracket P 369057 screw finger retaining bracket
22. rom switch making note of wire number and location for reinstallation Remove air tube from switch assembly Remove switch from control box Install new switch in reverse make sure air tube is not blocked or misaligned 0 63 62 19 do To adjust air pressure switch remove cover from the switch to expose adjusting screw To increase sensitivity turn screw counter clockwise to decrease sensitivity turn screw clockwise CONVEYOR DRIVE MOTOR REPLACEMENT Shut off power at main breaker Hemove conveyor Remove control panel top and front cover Disconnect wiring from motor and mark for reassembly Remove sprocket from motor shaft Remove 4 screws and remove conveyor motor and mounting bracket Remove mounting bracket from conveyor motor assembly Reassemble in reverse order IQ MMO gt CAPACITOR CONVEYOR MOTOR REPLACEMENT Shut off power at main breaker Remove control box cover and front panel Discharge capacitor before removing wires Mark wires for reassembly Remove mounting screw and remove capacitor Reassemble in reverse order Oo REVERSING SWITCH REPLACEMENT Shut off power at main breaker Remove control box cover and front panel Disconnect wiring from reversing switch and mark for reassembly Remove mounting nut and remove reversing switch Reassemble in reverse order and check system operation EJ CY T0 22 REVERSING CONVEYOR DIRECTION A Shut off power at oven switch B Setr
23. rough both normally closed control box hi limit thermostats to the oven power relay Its contacts now close supplying line voltage to the two main fan motors Closing the oven power switch also supplies line voltage to the control box cooling fans the oven control the control transformer and the conveyor motor TEMPERATURE Closing the oven power switch supplies line voltage through the 10 amp fuse through the CONTROL oven power relay to the primary of the control transformer 24VAC is supplied to the oven control The oven control is set to desired temperature The thermocouple will provide varying millivolts to the oven control The oven control supplies line voltage to the contactor at intermittent intervals to maintain desired temperature The display on the oven control will indicate when the contactor is energized NOTE The display also indicates oven temperature CONVEYOR DRIVE Closing the oven power switch supplies line voltage through the 10 Amp fuse through the oven power relay to the conveyor motor and to the primary of the control transformer oecondary voltage 24VAC is supplied to the oven control Setting the oven control to the desired time outputs voltage through a reversing switch to the conveyor motor NOTE The conveyor system uses a magnet and hall effect sensor to prove operation of the conveyor motor If the conveyor motor is not running BELT JAM is indicated on the display AUTOMATIC COOL When the oven is star
24. t note all wire numbers for reinstallation D Reassemble in reverse order and check system operation NOTE Be sure that leading edge of heating element is located in heating element mounting bracket located in oven cavity CONTACTOR REPLACEMENT Shut off power at main breaker Remove appropriate control box cover Remove all wires from contactor note all wire numbers for reinstallation Remove mounting screws and remove contactor Reassemble in reverse order and check system operation gt POWER FILTER REPLACEMENT Shut off power at main breaker B Remove control box cover C Remove all wires from the power filter note all wire numbers for reinstallation D Reassemble in reverse order and check system operation gt BEARING CONVEYOR REPLACEMENT A Remove conveyor from oven and place on a flat work surface B Remove connecting links from conveyor belting See Installation and Operating Instructions Manual C Remove conveyor belting from conveyor Remove drive sprocket from drive shaft D Move drive shaft or idle shaft toward end of conveyor and shaft with bearings will now slip out of holding bracket E Replace bearing and reassemble in reverse order CONTROL TRANSFORMER REPLACEMENT Shut off power at main breaker Remove wires from primary side note color and location Remove wires from secondary side note color and location Remove two mounting screws and remove transformer Re
25. ted the time delay relay timing circuit is enabled permitting the oven DOWN fans to operate for approximately 20 minutes after the oven is shut off to cool the oven The time delay relay will keep the coil of the motor relay closed maintaining operation of main fan and cooling motors 2 Low Profile 1600 Series Adv Dig Electric S M Int l SCHEMATIC MODEL 1621 000 EA 1628 000 A 1629 000 A 3802 ONIWIL 21 HOLON LW 60110001 7 778m ou eu GIA 3909 5NIMIL 59 911009 NOION SH 2H 4 eee T Pardi HANHOISNVHL IX NIVN HOLON 9H IH YNVIONI 3NAVM 3dAL 3 dn02ONN3HL ZOL I2L l13NOYH M 4 GEL ES ee ee GERE 5 oe acu NOVE NAA eae ae ea HOSNIS 123443 TlYH SH On Spp exi ees moxo T PCI V GST Sm FA SH mo 0091 YAYAH 81 1 LIMIT NJAO LVISOWHJHL 9151 Eimer eM Seo Jen LIWI1 HOH 1OHINOO LVISOHN3HL 1 1 RA 94 oe aoe ei Ghz GOES GOES NYJ 9N11002 1VISONJ3HI 21 11 Vet 3 1 STH ZTH ITH 0TH GH FH cH 2H Wo IS E 9N1S83A3H 3013ANO2 HOLIMS ZS 1 d rr Ar 9r sr NJAO 109109 NOD H3INOd N3AO HOLIMS IS SNOI Lv3I91JNO2 YILYIH 3104 ANNDYIN LIMIT HOIH NOLOVINOO PH 30A3ANOQ YOLIOWdYO L E 3104 lt 3OlOVINOO 929 YOLOW NVA NIYH gOLIQVqVO 1992
26. uld continue to be present for 20 minutes If voltage is not present for 20 minutes replace 20 minute time delay relay No control box SEE OVEN FAN WILL NOT RUN cooling Hi limit thermostat s Terminals are normally closed if open reset thermostat and test oven for proper operation If it will not reset replace thermostat Relay main fan motors Check for power to coil of oven fan relay If no voltage is present trace wiring back to hi limit thermostat Check for supply voltage to the contact of the relay If no voltage is present trace wiring back to fuse holder If voltage is present at the relay coil check to insure the contacts are closing Replace relay as needed Cooling fan s Supply voltage should now be at these motors If voltage is present check motor for open shorts or grounds WITH POWER OFF check for locked rotor Incoming power supply Check circuit breakers reset if needed Call power control box cooling company if needed Low Profile 1600 Series Adv Dig Electric S M Int l Cooling fan thermostat s Check the cooling fan thermostat Thermostat closes at 49 C and opens at 38 C With the cooling fan thermostat preheated check for continuity If switch is open replace Fuse 3 A cooling fan Check replace if necessary Fuse holder Check replace if necessary Cooling fan s Supply voltage should now be at these motors If voltage is present check motor for opens shorts or groun
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