Lincoln 1633-000-EA Convection Oven User Manual
Contents
1. 24 14 0 O SNOT IYOOO OD 1 9 MUVdS 295195 TOHINO 4 1 YI 2111 TOUINOD daNdng zog log PE 5344 334078 u3Nung HOLIMS 65 85 d 598 15 ge gi im RU el A peces Di cs LORS NIS See HEE Kn T TANDO DDN in 438 Q3M31A 3015 9 Low Profile 1600 Advantage Series Service Manual International TROUBLESHOOTING GUIDE MODEL 1633 000 EA NATURAL GAS 230 50 HZ 1 PHASE MODEL 1634 000 EA L P GAS 230 50HZ 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 Oven fan will not run No control box cooling No automatic control box cooling Oven will not heat POSSIBLE CAUSE Incoming power supply Oven fan switch Thermostat hi limit Fan fuse Fuse holder Oven fan relay Capacitor s Motor Fan switch Hi limit Oven fan relay Cooling fan s Incoming power supply Cooling fan thermostats Cooling fan s Gas supply Manual gas shut off valve Fan switch Main oven fan EVALUATION Check breakers reset if required call Power company if needed Check continuity between switch terminals Terminals are normally closed if open reset thermostat and test oven2. 369211 369058 370253 1609 370252 369745 369723 369783 369717 369057 369501 369238 369030 369390 370167 370663 370166 370662 370168 370665 370169 370664 369707 369740 369718 369931 369746 GENERAL PARTS ADVANTAGE SERIES DESCRIPTION Access window assembly Window retainer Window frame bottom Glass access window Window frame top Screw 10 32 1 4 Thumb screw Baffle Drive cover L H Oven top Drive cover R H Hinge assy right Door assy small Latch spring Finger retaining bracket Screw finger retaining bracket Latch Leg Caster High stand Caster Low stand Baffle air return U L L R S N 35950 amp Below Baffle air return U L S N 35951 amp Above Baffle air return U R L L S N 35950 amp Below Baffle air return U R S N 35951 amp Above Finger housing T 1 T 3 B 2 B 4 S N 35950 amp Below Finger housing T 1 T 3 B 2 B 4 S N 35951 amp Above Finger housing T 2 T 4 B 1 B 3 S N 35950 amp Below Finger housing T 2 T 4 B 1 B 3 S N 35951 amp Above Columnating plates see Installation Operations manual Finger cover Handle assy Door assy large Screw 8 32x3 8 Hinge assy left 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
3. Remove appropriate control box cover B Remove 4 mounting screws C Unplug electrical connector and remove fan motor D Reassemble in reverse order and check system operation MAIN FAN MOTOR REPLACEMENT Shut off gas supply and remove gas line and manifold lines from back of oven Remove screws from motor cover housing and lift off NOTE When ovens are stacked all motor cover housings are fastened together Unplug power connector Unplug thermocouple Unplug 2 motor connectors Remove 8 bolts from oven back 4 left 4 right and lift out Remove 1 screw from fan hub and slide fan blade off of motor shaft m Low Profile 1600 Advantage Series Service Manual International note location of fan blade for reinstallation Loosen lock nuts on cone Remove 2 mounting bolts and remove motor from back assembly Remove 4 hex head screws from motor mount bracket Remove motor mount from motor and reinstall on new motor 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 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
4. with speed potentiometer set to maximum speed approximately 2 min The meter reading should be approximately 100VDC 3 if voltage is not steady within limits then the board is usually bad Always check the speed potentiometer be sure it is OK before changing a control board This test is not always 100 accurate as this test is not performed at operating speeds However this test is the best method currently available If the D C control board is steady then the problem may be the motor or gearbox Check the brushes in the motor for excessive arching or unusual wear Check the motor and gearbox from instructions located on page 9 under possible cause listing conveyor gear motor Check to insure that the magnet cemented to shaft of conveyor drive motor has not been damaged or come loose from the motor shaft Replace as needed Check for any physical damage to hall effect sensor mounted on conveyor drive motor Check all wiring and connections for tightness and proper location Replace as needed Connect new hall effect to system and check for steady operation Measure the transformer primary for supply voltage input If voltage is not present trace wiring back to the fan relay If voltage is present measure the secondary output of the transformer Voltage across terminals 1 3 should be 12 15VAC Terminals 1 2 and 2 3 should be 1 2 the voltage reading from terminals 1 3 If the above 10
5. Low Profile 1600 Advantage Series Service Manual International Fuse holder Gas pressure switch internal to gas valve Check replace if necessary Check for supply voltage to neutral 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 gas filter in Oven air pressure switch Hi limit thermostat Ignition control Burner reset switch Burner blower motor Burner blower motor Air pressure switch Spark generator Igniter sensor assembly gas valve for blockage or damage See Adjustment section for location If the above checks OK but switch is still not closed replace gas valve 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 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 Check for supply voltage to ignition control at terminal 1 and neutral If voltage is not presen
6. from mounting tabs this is a pressure fit Reassemble in reverse order CALIBRATE TEMPERATURE A B see page 16 for connection of temperature sensor Set temp control to 500 Allow temperature to stabilize Fine tune temperature setting to achieve measured temperature swings from 497 F to 503 F When actual temperature falls between 497 F and 503 F the display must show 500 F Adjust temp adj Pot on temp display to achieve a display reading of 500 F TRANSFORMER TEMPERATURE DISPLAY REPLACEMENT A B C D Remove control box cover and front panel Remove 5 wires 2 primary side 3 secondary side note color and location of wires for reinstallation Remove 2 screws from transformer base and replace assembly Reassemble in reverse order and check system operation Low Profile 1600 Advantage Series Service Manual International 15 16 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 Remove 2 screws from relay base and replace relay D Reassemble in reverse ord
7. sensor Magnet 8 pole Conveyor motor assy includes BB CC DD Control box top R H Jumper thermocouple Temperature display dual Side panel R H Pilot light 250V Temperature control pot assy Conveyor pot assy Knob guard Switch on off Knob 22 Low Profile 1600 Advantage Series Service Manual International Low Profile 1600 Advantage Series Service Manual International CONTROL PANEL 23 24 CONTROL BOX LEFT PARTS 1633 000 EA 1634 000 EA LETTER PART 369706 369507 369431 369573 369771 357107 369014 369368 369378 369192 3 0296 369575 369025 369580 369571 369589 369590 369937 369773 369757 369758 369689 3 0186 3 0031 369557 369574 370272 370250 369579 N lt XxXE lt C A x JO UOZ lt SAC Low Profile 1600 Advantage Series Service Manual International DESCRIPTION Thermocouple with extension Thermostat cooling fan Thermostat control box hi limit Ignition control Reset switch ignition control Fuse holder Fuse 10A Thermostat hi limit cooling fan Capacitor Wire hanger Air pressure switch Air pressure switch Gas valve Connector Burner blower motor Igniter sensor assy Venturi Nat Venturi L P Main orifice Nat main orifice L P Pressure tap fitting Solenoid valve By pass orifice Nat By pass orifice L P Spark generator Side panel L H Control box top L H Alarm Low Profile 1600 Adv
8. spider assembly on the fan hub see drawing below ee amp THERMOCOUPLE TYPE J REPLACEMENT A Remove control box covers Remove motor cover and remove oven back to access thermocouple NOTE Removal of oven back assy Is required to replace thermocouples B 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 C Reassemble in reverse order making sure bulb is placed securely in the wire form in the oven chamber D 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 INFORMATION When two wires composed of dissimilar metals are joined together and one of the ends is heated a continuous current flow as generated We use an iron constant type J thermocouple The iron wire increases the number of dissimilar junctions It is possible to check a thermocouple with a properly calibrated D C millivolt meter At 32 F the millivolt reading should be 0 00 This can be checked by inserting the thermocouple into an ice bath The millivolt reading at 72 F should be 1 134 When using
9. the following chart the temperature at the terminal connections must be noted This temperature is called the junction temperature Low Profile 1600 Advantage Series Service Manual International 17 18 The following chart lists the thermocouple millivolt readings from 200 F to 600 F 899 250 V 4 77 6 30 4 83 6 36 4 88 6 41 4 94 6 47 5 00 6 53 5 06 6 59 5 11 6 64 5 17 6 70 5 20 6 73 5 28 6 76 5 29 6 82 5 34 6 87 5 40 6 93 5 46 6 99 5 52 7 05 5 57 7 10 5 63 7 16 E N 3007 729 8 06 9 60 10337 11 14 12 69 1423 15 76 735 812 9 66 10 43 1120 1274 1428 15 82 BEARING CONVEYOR REPLACEMENT m Hemove conveyor from oven and place on a flat work surface Remove connecting links from conveyor belting See Installation and Operating Instructions Manual Hemove conveyor belting from conveyor Remove drive sprocket from drive shaft Move drive shaft or idle shaft toward end of conveyor and shaft with bearings will now slip out of holding bracket Replace bearing and reassemble in reverse order Low Profile 1600 Advantage Series Service Manual International This page intentionally left blank Low Profile 1600 Advantage Series Service Manual International LETTER C NV CO UOZST SCT TILTOTMOOUW gt S lt Xx PART 369110 369929 369926 369925 369927 369930
10. voltage is present check both fuses on the control board 8 Amp line and 1Amp armature Check the D C voltage output at terminals A and A If A C voltage is at terminals L1 and L2 and no D C voltage is present at and A replace control board If A C voltage is present and D C voltage is present but Conveyor the motor will not run check gear motor as follows If D C voltage is present at A and A Low Profile 1600 Advantage Series Service Manual International gear motor Conveyor Conveyor speed varying Power supply or intermittent Motor control board D C Gearmotor Magnet Hall Effect Sensor Temperature display Display transformer inoperative 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 damaged Replace motor as needed Check for any mechanical misalignment Also check for worn bearings A conveyor belt that is over tightened will cause excessive bearing wear and sometimes irregular speed Check power supply at the D C control board for supply voltage at board terminals L1 and L2 Place the test meter probes on terminals A and A
11. Low Profile 1600 Advantage Series Service Manual International Temperature display Inaccurate erratic Or inoperative Temperature display Thermocouple secondary readings are not achieved replace transformer 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 Connect the thermocouple of a pyrometer to the thermocouple on the temperature control board be sure to maintain proper polarity of thermocouple leads see adjustment section for proper procedure The pyrometer will indicate oven temperature display Measure D C millivolts of thermocouple at the temperature display See thermocouple chart in section D for proper readings Replace thermocouple if proper readings are not achieved If readings are correct on the thermocouple replace temperature display Low Profile 1600 Advantage Series Service Manual International 12 REMOVAL INSTALLATION amp 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 Remove appropriate control box cover Remove front portion of relay by releasing tabs on side pulling straight out rocking motion Remove wires from plug in termin
12. SERVICE MANUAL INTERNATIONAL IMPINGER CONVEYOR OVENS LOW PROFILE 1600 INTERNATIONAL ADVANTAGE 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 Int l Fax 260 436 0735 Technical Service Hot Line 800 678 951 1 www lincolnfp com AV Da STAR CERTIFIED SERVICE AND PARTS 1600expadv HEV 1 8 07 SERVICE AND PARTS MANUAL 1600 INTERNATIONAL ADVANTAGE SEQUE NGE OF OPIERATIOINS Gs dt A ikindi alsa aa a Ssh 3 SORE NATION us heehee Rk e 5 TROUBLESHOOTING GUIDE EE ola aa ea ama 6 REMOVAL INSTALLATION amp ADJUSTMENT St 12 GENERAL tape 20 ADVANTAGE N P C 20 CONTROL BOX RIGH IMPAIR T Orci dite pi tM ux tei A EE 22 CONTROL BOX LEFT PARIS 24 OVEN BAGR PAR S reee nesses den sl 26 CONVEYOR PARTS dips ERU EE GI t pr e mera PER ones SE D e up M Neu Stee 28 Low Profile 1600 Advantage Series Service Manual International 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 groun
13. al strip note wire numbers and location Hemove two screws from mounting bracket and remove Reassemble in reverse order Check system operation m oou BURNER BLOWER MOTOR REPLACEMENT Remove appropriate control box cover Unplug motor connector Remove three screws from blower tube at burner housing Remove air shutter assy From old motor for installation on new motor assy Reassemble in reverse order and check system operation NOTE CHECK AIR SHUTTER ADJUSTMENT should be set at 1 2 open gt BURNER INDICATOR LIGHT REPLACEMENT A Remove control box cover B Remove two wires from light housing C Slide light housing sideways to remove D Reassemble in reverse order and check system operation AIR PRESSURE SWITCH REPLACEMENT Remove control panel top Disconnect wires from switch making note of wire number and location for reinstallation Remove air tube from switch assembly Remove switch from wire hanger Install new switch in reverse make sure air tube is not blocked or misaligned mootuug 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 Check for proper line voltage switching from N C to N O as the air pressure switch closes CONVEYOR CONTROL POTENTIOMETER 10 K OHM REPLACEMENT Remove control box cover Loosen two allen screws and rem
14. antage Series Service Manual International CONTROL PANEL 25 26 OVEN BACK PARTS 1633 000 EA 1634 000 EA LETTER PART 369547 369724 369776 369777 369778 369761 369759 1627 369033 3 0245 3 0246 368725 369085 369376 353082 369698 3 0184 OUOZzlAc rgomnmoououo Low Profile 1600 Advantage Series Service Manual International 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 Manifold assy Fan counter clockwise rotation Junction box Terminal block 3 pole Ground lug Cover junction box Filter RFI Low Profile 1600 Advantage Series Service Manual International 27 28 LETTER gt CONVEYOR PARTS PART 369830 369816 369825 369813 369314 369812 369160 369814 369811 369161 369806 3 0050 369162 Low Profile 1600 Advantage Series Service Manual International 1633 000 EA 1634 000 EA DESCRIPTION Complete conveyor Conveyor belting Belt 1ft section Conveyor bearing block Roll conveyor notched Conveyor idler shaft Conveyor pan stop Connecting link Conveyor drive shaft Roller chain sprocket Crumb pan Conveyor frame Drive chain Low Profile 1600 Advantage Series Service Manual International 29 30 This page intentionally left blank Low Profile 1600 A
15. assemble in reverse order NOTE Be sure to reset breaker before operation moop CONVEYOR DRIVE MOTOR REPLACEMENT Shut off power at main breaker Remove 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 LOommuooumre REVERSING CONVEYOR DIRECTION Shut off power at main breaker Remove control panel top Reverse wires fastened to terminals A and A on conveyor control board See schematic diagram for wire numbers Reassemble in reverse order om HALL EFFECT SENSOR REPLACEMENT Shut off power at main breaker Remove control panel top and front cover Remove conveyor motor assembly Remove wire connector from hall affect sensor board Remove 2 screws from conveyor drive motor Remove sensor board from mounting bracket Reassemble in reverse order W gt FUSEHOLDER REPLACEMENT A Remove appropriate control box cover B Remove 2 wires note wire number and location C Remove lock nut on back side of fuse holder and push out D Reinstall in reverse order and check system operation GAS VALVE REPLACEMENT AND ADJUSTMENT Remove appropriate control box cover Disconnect the gas piping from the back of the unit Remove the 4 screws from the incoming
16. d CONTROL BOX AUTO COOL DOWN When the temperature in either one of the control boxes reaches 120 F 3 49 C 1 79 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 1 7 MAIN FAN CIRCUIT Line voltage is permanently supplied to a normally open contact of the oven power switch Line voltage is permanently supplied to the two normally open cooling fan thermostats a normally open contact of the oven power relay Closing the oven power switch supplies line voltage to oven power relay its contacts now close supplying line voltage to the two main fan motors and the two burner circuits Closing the oven power switch also supplies line voltage to the control box cooling fans the temp display and the conveyor circuit BURNER CIRCUIT NOTE This oven utilizes two complete burner temperature control systems The sequence of operations is the same for each system Closing the main fan switch supplies line voltage through the oven power relay through a three amp fuse through the gas pressure switch through the main fan air pressure switch through the oven cavity hi limit thermostat to the ignition control The combustion motor is energized The normally open combustion air switch closes upon sensing air pressure After a pre purge period of between 30 and 60 seconds the ignition transformer and the main gas va
17. dvantage Series Service Manual International This page intentionally left blank Low Profile 1600 Advantage Series Service Manual International 31 32 Lincoln l nodis TAR CERTIFIED SERVICE AND PARTS Low Profile 1600 Advantage Series Service Manual International
18. e to the igniter sensor assembly replace Also check for frayed or damaged wires in burner tube 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 gas pressure at gas pressure tap located in gas piping at burner manifold If there is no gas pressure replace gas valve To check for flame sensor operation connect a digital multimeter capable of measuring D C micro amps in series with the flame sensor wire and ignition control Sensor current is 3 micro amps D C minimum NOTE The D C micro amp test must be conducted with the oven in low flame bypass operation Turn the temperature control to its lowest setting If these readings are not achieved replace igniter sensor assy Also check for any type of damage to flame sensor wire and connections If there is sufficient flame sensor current but the burner will not remain ignited check the reset button on ignition control NOTE Check for proper polarity of the power supply If all of the above are OK replace ignition control Check for supply voltage across terminals L2 and 240 on temperature control board If no voltage is present check wiring back to hi limit thermostat Turn the temperature adjustment knob to the maximum temperature position and check for supply voltage at
19. e to the primary of the temperature display transformer The secondary of this transformer supplies 12 VAC to the temperature display The thermocouple supplies DC millivolts to the temperature display The display converts this millivolt reading to a temperature reading 4 Low Profile 1600 Advantage Series Service Manual International SCHEMATIC MODELS 1633 000 EA AND 1634 000 EA SUNN G3 13534 d3Nng HOLIMS 25 95 d0SN35 123443 TIYH SH WaWHOJSNVHL 65384 NJAO HOLIMS SSS YOSNAS 34Y1J 254 164 39VINVAQY 3114084 MOT Y39NIdMI NOILIY In93 3uflVu3dW3l JAWA PA EA 35065338 LINI 59 HOLIMS CG eG 831113 INIT 174 P 10714 3 BATMA ZA LA W3MOd HOLIMS 1S VE HNN ISNA Ed VNVIONI 3NAVM 1804 AYWMSIQ 3dnlydadh3l 1 d3MOd NJAO AY SN YOL SYOLOW NIYN 3503 14 2 060 9060 pan een 91 191 14918 OL 1397 dan0d 94 1041409 dl 310419373 291391913 eof poo dAL 31dn00Md3HL Z01 101 YOABANOD 10 tH 331713 Ol LN3OYKONLIINI ET ET 00 000 39078 TYNIN31 281 181 UNO YANYANA dOLON SH EH MOL 104 TOHLNO YOA3ANOD dd LIWIT IH N3AO 1VISOMUSHI 91 61 3 9411009 UOLOW GH GH SH ZH JOMINO YOASANOD IO on 101 QUT SER LIKIT IH X08 TINO LYISOHYJHL HOLOW W IN VL O HIV 1100410 B2 9NI1002 LVLSOMMHI 1 11 13N9YW W OH S Z
20. enerator assembly Reassemble in reverse order and check system operation mootump IGNITER SENSOR REPLACEMENT A Remove appropriate control box cover Remove gas valve assembly see gas valve C Remove screws from burner tube and pull burner assembly out D Remove wire connectors from igniter sensor assembly E Remove screws from mounting bracket and remove assembly Reassemble in reverse order and check system operation NOTE After installation check all pipe fittings for leaks SWITCH BURNER RESET REPLACEMENT A Remove appropriate control box cover B Disconnect wires from ignition control see ignition control Note wire number and location for reassembly C Pull off black operating knob and remove hex mounting nut D Reassemble in reverse order TEMPERATURE REGULATING VALVE REPLACEMENT Remove appropriate control box cover Remove bypass tube assembly Remove 4 nuts from burner orifice bracket Disconnect pipe union Disconnect 2 wires from valve and remove assembly Remove gas piping from old valve and install on new valve Reassemble in reverse order and check system operation NOTE Check all gas line fittings for leaks and insure valve gas flow is in proper direction ommoomgm MAIN ORIFICE REPLACEMENT A Remove appropriate control box cover B Remove bypass tube assembly C Remove 4 nuts from burner orifice bracket D Disconnect pipe union Low Profile 1600 Advantage Seri
21. er making sure wire connections are properly seated E Check system operation THERMOSTAT COOLING FAN REPLACEMENT A Remove appropriate control box cover B Remove 2 wires from thermostat note wire number and location C Remove 2 mounting screws and replace thermostat D Reassemble in reverse order and check system operation ELECTRONIC TEMPERATURE CONTROL REPLACEMENT Remove control box cover and front panel Identify correct control and remove wires from control Note wire number and location for reinstallation Hemove temperature control from mounting tabs Reassemble in reverse order and check system operation mootuugd TEMPERATURE SETTING FOR NEW TEMPERATURE CONTROL BOARD PROCEDURE FOR SETTING MAXIMUM TEMPERATURE POTENTIOMETER NOTE When replacing temp control turn oven temperature control to its maximum heat position and allow 30 minute preheat before calibrating Connect temperature probe to the oven thermocouple leads at the temperature control board and adjust potentiometer to a maximum temperature of 600 F see diagram above HIGH LIMIT THERMOSTAT REPLACEMENT A Remove appropriate control box cover B Remove 2 wires from thermostat note wire numbers and location for reinstallation C Remove screws from bracket and remove thermostat D Reassemble in reverse order and check system operation NOTE Depress reset button to insure thermostat is set for operation COOLING FAN MOTOR REPLACEMENT A
22. es Service Manual International E Remove assembly and replace main orifice Reassemble in reverse order and check system operation NOTE Check all gas line fittings for leaks TEMPERATURE CONTROL POTENTIOMETER REPLACEMENT OO m Remove control box cover Loosen screw and slide knob off potentiometer shaft Remove lock nut and push out Remove 3 wires from electronic temperature control note wire color and location for reinstallation Reassemble in reverse order and check system operation THERMOSTAT HIGH LIMIT OVEN CAVITY REPLACEMENT A B C D Remove appropriate control box cover Remove motor cover and remove oven back to access high limit thermostat Hemove wires from thermostat note wire numbers for reinstallation Remove mounting nut from high limit thermostat and remove high limit from oven Reassemble in reverse order Check system operation ON OFF SWITCH REPLACEMENT com Remove control box cover Depress spring clips on side of switch and push out Hemove 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 DUAL TEMPERATURE DISPLAY REPLACEMENT mere mage Shut off power at main breaker Remove control panel top and front cover Remove all wires from temperature display and mark wires for reassembly Pry temperature display to remove
23. for proper operation If it will not reset replace thermostat Check replace if necessary Check replace if necessary 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 at terminal 6 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 Check for opens shorts or grounds Check for opens shorts or grounds SEE OVEN FAN WILL NOT RUN 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 Check circuit breakers reset if needed Call power company if needed Thermostat closes at 120 F and opens at 100 F With the cooling fan thermostat preheated check for continuity If switch is open replace Supply voltage should now be at these motors If voltage is present check motor for opens shorts or grounds WITH POWER OFF Check for locked rotor Check for adequate gas supply to oven Check to see that the manual gas shut off valve is open Check to see that the fan switch is on Check if main oven fan is operating if not refer to oven fan will not run NOTE These ovens utilize 2 complete Burner Temperature control systems Each system will Follow the same troubleshooting sequence Fuse burner 3A Check replace if necessary
24. have minor design changes not shown in the exploded view drawing on page 21 Low Profile 1600 Advantage Series Service Manual International Low Profile 1600 Advantage Series Service Manual International n Te uw m rH c gt L D m i m 21 CONTROL BOX RIGHT PARTS 1633 000 EA 1634 000 EA LETTER PART 369158 369705 369757 369758 3 0186 369590 369937 369773 369401 369589 369580 3 0031 369557 369173 369571 3 0296 367378 369575 369154 369192 357107 369013 369014 369507 369431 370177 369465 369573 369856 369422 AA 369810 BB 369823 CC 369824 DD 369822 EE 370244 FF 370251 GG 3 0058 HH 3 0249 370256 JJ 369467 KK 369449 LL 369809 MM 370277 NN 369432 OO 369316 T Im OU _ TO lt lt om3ovozzr m DESCRIPTION Sprocket 10 tooth Thermocouple Main orifice Nat Main orifice L P Solenoid valve Igniter sensor assy Venturi Nat Venturi L P Air shutter assy Burner blower motor Gas valve By pass orifice Nat By pass orifice L P Transformer temp display Connector Wire hanger Cooling fan Air pressure switch Circuit breaker 7A Capacitor Fuse holder Fuse 3A Fuse 10A Thermostat cooling fan Thermostat control box hi limit Conveyor control Temperature control Ignition control Support stand off Relay Cable hall effect sensor Hall effect sensor Bracket hall effect
25. his will cause the units to cycle on and off intermittently This may be caused by improper ventilation or lack of preventive maintenance Also most of the problems listed under Oven Conveyor will not run Power supply Fan switch Fuse 10 Amp Fuse holder Filter E M I Speed adjustment potentiometer D C motor control board will not heat can cause intermittent failure Check for supply voltage at terminals L1 and L2 If voltage is not present check breakers See procedure for checking on page 6 Check and or replace Check and or replace Check for supply voltage input to filter If there is no voltage trace wiring back to relay If there is input voltage check for output voltage If there is input voltage but no output voltage replace filter This is a O to 10K ohm 1 turn potentiometer With power off remove the black and white pot leads from the conveyor control board at terminals P1 and P2 Place the meter leads on black lead P2 and the white lead P1 Rotating the pot slowly from low to high the meter reading should show an even transition from 0 to 10K ohms t 596 There should be no dead or open spots through the one turn of the pot Check both leads to ground There should be no continuity to ground If any of the above fail replace the potentiometer Check for supply voltage input to the control board at terminals L1 and L2 If not present check wiring back to the filter If supply
26. lve are energized Ignition should now occur TEMPERATURE CONTROL Closing the oven power switch supplies line voltage through the oven power relay through a three amp fuse through the gas pressure switch through the main fan air pressure switch through the oven cavity hi limit thermostat to the temperature control board The 1 0K temperature pot is adjusted to desired temperature The thermocouple will provide varying millivolts to the temperature control The temperature control supplies line voltage to the solenoid valve at intermittent intervals to maintain desired temperature CONVEYOR DRIVE Closing the oven power switch supplies line voltage through the oven power relay through the electromagnetic filter to the conveyor control AC volts are converted to DC volts and are supplied to the conveyor motor at terminals A and A Low Profile 1600 Advantage Series Service Manual International 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 TEMPERATURE DISPLAY Closing the power switch supplies line voltag
27. nipple mounting bracket Remove incoming nipple Disconnect 2 plugs 1 3prong and 1 4 prong note location mootug Low Profile 1600 Advantage Series Service Manual International 13 14 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 cap and adjust as needed 3 5 W C for natural gas 10 W C for L P and 2 0 W C for town gas Check gas filter by removing cover plate located on either side of valve Remove 4 screws and slide filter out of valve housing and inspect Reassemble in reverse order and check for leaks around cover BURNER ALARM REPLACEMENT A Remove appropriate control box cover B Remove 2 wires from alarm note wire numbers and location C Remove retainer cover from alarm and remove assembly from control box D Reassemble in reverse order and check system operation SPARK GENERATOR REPLACEMENT Remove appropriate control box cover Remove 2 wires for spark generator Unplug connector on bottom of spark generator Remove 2 mounting screws and remove g
28. ove knob by sliding off shaft Remove nut from potentiometer shaft and push out Unplug wire connector from conveyor control board Reassemble in reverse order and check system operation Recalibrate conveyor control board MIMI O 927 e CONTROL BOARD REPLACEMENT A Shut off power at main breaker B Remove control panel top and front cover C Disconnect wiring push on connectors from control board note proper location of connectors for reinstallation and exchange boards on the mounting bracket before reinstallation D Reassemble in reverse order and check system operation Low Profile 1600 Advantage Series Service Manual International 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 Hz Recheck at 2 minute and 20 minutes until proper readings are achieved seal pots with glyptol or nail polish CIRCUIT BREAKER Shut off power at main breaker Remove control top and front panel Disconnect 2 wires from circuit breaker Remove knurled mounting nut and push out Re
29. t trace wiring back to hi limit thermostat Check for supply voltage at terminal 6 to neutral If no voltage is present wait 30 seconds and check reset button If above fails replace ignition control Switch is normally open Check to see that the switch closes when reset button is pushed Replace as needed Check for supply voltage to burner blower motor WITH POWER OFF Turn blower wheel to check for locked rotor If supply voltage is present and motor does not run replace motor Check for supply voltage switching to terminal N O as the air pressure switch closes Check for air tube blockage or misalignment adjust air pressure switch If the above fails replace air pressure switch After a pre purge time of 30 to 60 seconds after blower motor starts check for supply voltage to spark generator If voltage is not present Check reset button located on rear of control box If voltage is still not present replace ignition control If voltage is present visually check for spark at igniter head Check for visible damage to igniter sensor assembly If there is no visible damage to the components and no spark Low Profile 1600 Advantage Series Service Manual International Gas valve Flame will not stay on Flame sensor Ignition control Pilot lamp is on Temperature control But no main flame Thermocouple probe Temperature control Potentiometer replace the spark generator If there is visible damag
30. the load terminal 7 and 8 If voltage is present and unit is not heating refer to temperature regulation valve for next check If voltage is not present proceed With power on and thermocouple leads attached to board measure the millivolt out put of the thermocouple Refer to the thermocouple chart in section D for proper readings WITH POWER OFF Remove the potentiometer leads from the temperature control board Place ohm meter test leads on the blue and green pot leads Reading should be 1 K ohms Place meter leads across the blue and purple pot leads and rotate knob from high to low Repeat on green and purple leads Check for even rise and fall of ohms reading to insure that there are no open or dead spots in the potentiometer Check each lead to ground for shorts Replace potentiometer 8 Low Profile 1600 Advantage Series Service Manual International Temperature regulation valve Intermittent heating Thermal overload of main fan and burner blower motors as needed If supply voltage is present on the 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 The main fan motors and the burner blower motors are equipped with internal thermal protection and will cease to operate if overheating occurs As the motors overheat and then cool t
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