FIELD SERVICE MANUAL CONVEYOR OVEN MODEL
Contents
1. ON OFF i REVISION REV DATE DESCRIPTION ECN D 7 22 13 chg probe positions on drawing MJC block 4 whit 7 z 5 B 6 6 le kd 6 5 24 VDC 2 POWER 8 SUPPLY 5 E E 3g E n a a E il i 8 L amp X T 5 D zone 4 zone3 zone2 zone1 1 blue x 8 c blue 2 2 amp d 58 2 gt 0 zone Drive X a 8 az y 8s sl la E 5 3 zone2 G 9 Ole m CONTROL ORIENTATION BEGIN HEATER TUBE WIRING AT ZONE 2 bioak s MOTOR DRIVE j CORD SIDE BOARD nt bis ELS POSITION All B E X fuse 35 AMP OTHERS OFF SS N MASTER MASTER ON OFF ati ON OFF fan switch USE TERMINALS Em RN as Cy z3959899002r fan motor block 2 i L3 8 capped L2 a EN oyen 13 Treset ot yellow reen o fi i E ellow an swit 5 E y reen 11 block 1 fan motor L2 to L1 side of main terminal blogk WD0037 D BELLECO INC DRAWN BY MICHAEL CLAVET HEATER TUBE WIRE DIAGRAM FOOD EQUIPMENT SPECIALISTS MDG 18 OVEN P O BOX 880 208 240 VOLT SACO ME 04072 DATE 07 16 2013 SINGLE PHASE z warranty mclavet wirediagram mgdov wirdiag6 ds Page 14 of 18 FIELD SERVICE MANUAL CON2. to L1 side of main terminal blog W D 004 3 BELLECO INC DRAWN BY MICHAEL CLAVET DRIVE SYSTEM DIAGRAM FOOD EQUIPMENT SPECIALISTS MDG 18 OVEN P O BOX 880 208 240 VOLT DATE 08 23 2013 SINGLE PHASE SACO ME 04072 z warranty mclavet wirediagram mgdov drivewd ds4 Page 15 of 18 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 HEAT SYSTEM WIRE DIAGRAM oan probe zone 1 probe zone 3 probe zone2 probe zone 4 Power 2 REVISION ON OFF x x x REV DATE DESCRIPTION ECN CONTROL SIDE OF UNIT white me a red CONTROL SIDE TUBE WIRING AT ZONE 2 WITH RIGHT TO LEFT BELT TRAVEL fan switch fan motor ORIENTATION BEGIN HEATE ji j CORD SIDE fuse 35 AMP MASTER ON OFF MASTER ON OFF USE TERMINALS block 2 fan swi A 8 230 Vac IN Y yellow 24VACOUTI yellow 24 VAC TRANSFORMER L1 block 1 fan
3. 3ELLECO Foodservice Equipment Specialists P O Box 880 Saco ME U S A 04072 877 854 8006 FAX 207 283 8080 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 Page 1 of 18 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL UNCRATNG AND INSPECTION ASSEMBLY AND INSTALLATION ELECTRICAL INSTALLATION OPERATIONAL SEQUENCE TROUBLESHOOTING GUIDE DRIVE SYSTEM COMPONENTS DIGITAL DISPLAY CONTROL WIRE DIAGRAMS HEATER ELEMENTS PARTS BREAK DOWN EXPLODED VIEWS MDG 18 PAGE 2 PAGE 2 PAGE 2 PAGE 3 PAGE 4 5 6 7 8 PAGE 9 10 PAGE 11 PAGE 12 13 14 PAGE15 PAGE 15 PAGE 16 Page 2 of 18 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 UNCRATING AND INSPECTION Unpack the unit and components from the shipping container Remove all visible packing materials including those that may be inside the baking chamber If damage is discovered file a claim immediately with the carrier that handled the shipment ASSEMBLY AND INSTALLATION The equipment is shipped fully assembled and ready to plug into a matching outlet specified for its specific voltage and amperage rating Removal or replacement of the power cord and plug will VOID the warranty For assistance contact the Belleco Inc Service Team at 1 877 854 8006 Please refer to the appropriate schematic at the rear of this manual for plug configurations Consult with a licensed electrician prior to installation Do not operate this equipment
4. of 18 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 SECONDARY PANEL COMPONENT LAYOUT G Contactor Relay H Terminal Block 6 Terminal Block 7 J Fan Switch Page 11 of 18 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 BACK SIDE VIEW OF CONTROL PANEL BACK VIEW OF DIGITAL DISPLAY CONTROL A ON OFF Switch Push Button B Connector J12 Wires to Speed Board C Connector J7 Heat Probes Zone 3 amp 4 D Connector J1 Heat Probes Zone 1 amp 2 E Connector J37 ON OFF Switch Soft Power F Connector J13 24 VDC Out To Heat and Drive Relays G Connector J38 Incoming 24 VAC power Page 12 of 18 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 MOTOR DRIVE BOARD 1 EMILE 5 2 11 IMPORTANT 2 SET JUMPERS 2 9 L2 4 amp 8IN THE
5. wire diagram trace wires leading from terminal number 3 on relay basesto terminal block number 8 on side of unit Check for proper connection of all wires to the terminal blocks on both sides of the unit CONECTOR J131S CONNECTIONS TO eiit TERMINAL 7 ARE CORRECT SEATED Check green blue Inspect remaining wire black and white wire connections to relay connections ftom bases to make sure they conector J13 to terminal are on the correct number 7 at heat relay terminals refer to wire bases for proper diagram connection ALL CONNECTIONS TO TERMINAL BLOCK NUMBER 8 AND HEATER TUBES ARE CORRECT Digital Display Control Boardmay needto be replaced NOTE Theelements in each zone are wired three in series If one elementis buirned out the remaining two will turn off If glass is broken replace heater tube and test operation If coil is burnt replace element and test operation ELEMENT COIL AND GLASS ARE INTACT Check connector J13 at rear of Digital Display Control Board to be sure it is seated correctly If connector is loose unplug connector form board and reconnect Note refer to page 9 for component layout Page 9 of 18 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 MAIN PANEL COMPONENT LAYOUT A Conveyor Speed Board B Power Supply 24V DC C Motor Driver Board D Transformer 24V AC E Heat Relay Bases 4 ea F DPDT Drive Relay 1 ea Page 10
6. without the crumb trays properly installed as this may cause overheating and loss of productivity CAUTION During installation Do not place on surfaces or near walls partitions or kitchen furniture and the like unless they are made of non combustible material or clad with non combustible heat insulating material and pay attention to fire prevention regulations CAUTION To reduce the risk of fire the appliance is to be installed in non combustible surroundings only with no combustible material within 18 inches of the sides front or rear of the appliance or within 40 inches above the appliance Food may burn Therefore equipment must not be used near or below curtains and other combustible materials They must be watched ELECTRICAL INSTALLATION AN N WARNING Disconnect the unit from its power source before installing or removing any parts WARNING Check with your local power company or licensed electrician before installation to determine the actual voltage at the outlet For a unit rated 208 volts never plug it into 240 volts as serious overheating and damage could occur For a unit rated 240 volts never plug it into 208 volts as the lower voltage will greatly reduce the productivity of the unit WARNING NEVER operate any piece of equipment without proper GROUND connection Improper grounding may result in serious personal injury or could be fatal Page 3 of 18 FIELD SERVICE MANUAL CONVEYOR OVEN
7. MODEL MDG 18 OPERATIONAL SEQUENCING POWER SUPPLY Power is supplied to the oven through a 10 gauge cord with a 6 30P plug Depending on voltage of oven ordered power supply is to be either 208 or 240 volts single phase at the outlet MAIN POWER Toggle located at the rear of the unit When in the ON position the main relay is energized Power is supplied through a 30 AMP fuse to the A C transformer and the DC power supply AUTO COOING FEATURE Power is permanently supplied to the normally open thermostat fan switch When temperatures reach 120 F 3 F 48 9 C 3 C the switch closes energizing the cooling fans The switch will open when the control box temperature is reduced to 90 F 3 F 32 2 C 3 C interrupting power to the cooling fans OVER TEMP HI LIMIT RESET In the event of an over heat situation causing the temperature in the control box to exceed 190 F 3 F 87 7 C 3 C the hi limit reset switch will open interrupting power to the heat and drive systems Once the unit has cooled down the hi limit reset may be manually reset energizing the controls HEAT CIRCUIT RELAYS The four heat relay coils are energized through connection J13 on the on the digital control panel CONVEYOR DRIVE CURCUIT The DPDT relay for the drive motor is energized when the Soft Power Button on the control panel is pressed DIGITAL DISPLAY TEMP SPEED CONTROLLER The digital display controller receives 24 VAC power at bo
8. ON 53 POSITION ALL mi OTHERS OFF S2 S1 H2 ON H E OFF H1 Y 42345678 A mint TORQ A 4 320 50 z warranty mclavet wirediagram mgdov bodine ds4 REMOVING NON WORKING BOARD 1 DISCONNECT UNIT FROM POWER SUPPLY 2 Tag each wire connecting to terminals on board before removing wires 3 Carefully disconnect wires from terminal 4 Remove four 4 Philips head mounting screws and remove board INSTALLING NEW BOARD WARNING THIS COMPONNET IS STATIC SENSITIVE DO NOT SET ON METAL SURFACE WHILE HANDLING BOARD 1 IMPORTANT SET JUMPERS ON NEW BOARD BEFORE INSTALLING AS SHOWN ABOVE 2 DO NOT TOUCH BLUE TRIM POTS ON BOARD 3 Install new board and secure using 4 Philips head screws removed in step 4 above 4 Connect wires to board and test Page 13 of 18 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 WIRE DIAGRAM probe zone 1 probe zone 3 probe zone 2 probe zone 4 gt Soft Power
9. VEYOR OVEN MODEL MDG 18 DRIVE SYSTEM WIRE DIAGRAM Soft Power ON OFF REVISION REV DATE DESCRIPTION ECN 9 2 S E 24 VDC 5 POWER ME SUPPLY gt 3 al L drive So g o z S8 cS ES 8 O El s TE 2l 1 Fig blue amp 8 pi bluel2 L2 2 D 82 i 50 Drive Motor Y e me i 2 gt p oo G oo 8 block 3 m gt o T1 T2 block 5 MOTOR DRIVE 166155 CORD SIDE BOARD IMPORTANT m ai SET JUMPERS ES 4 amp 8 IN THE 4 POSITION ALL BE J fuse 35 AMP use OTHERSOFF BEY MASTER 3 MASTER ON OFF ON OFF USE TERMINALS lt block 2 Hne ae L2 ui z amp psovaciN oy yellow reen 52 24 VAC ze yello 5 block 1 fan motor
10. al block 3 see wire diagram CORRECT VOLTAGE FROM DC Power Supply TOL1 AND L2 ON MOTOR CONTROL BOARD Green LEDis Lit Check output voltage at terminals A1 and A2 from Motor Control Board If no output voltage is detected then Motor Drive Board needs to be replaced CORRECT OUTPUT VOLTAGE TO 1 AND 2 ON MOTORDRIVE BOARD Check incoming power 24VDC from DC transformer to L1 and L2 on Motor Drive Board green power LED should be lit If no voltage found check DC Power Supply for incoming power 24VAC from AC transformer to terminals L on DC Power Supply Ifno voltage to DC Power Supply is detected check wire connections to terminals L and N as well as connections to terminal block 2 see wire diagram SPEED BOARD RECIEVING CORRECT POWER Check for output voltage from terminals T1 and T2 on Speed Control Board then check voltage at terminals 1 and S2 on the Motor Drive Board to verify current is reaching terminal 51 and S2 on the Board If no output voltage is found at T1 and T2 on the Speed Board then Conveyor Speed Board needs replacing Note refer to page 9 for component layout Continued page 7 Page 7 of 18 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 HEAT SYSTEM FLOW CHART 55 212 DIGITAL From connection J13 on the CONTROL PANEL digital control panel 24 volts Return power through the AC is supplied to the input relay coils exits through Recives 24 VAC f
11. ard connection J38 from the A C transformer when the Soft Power Switch is in the ON position Page 4 of 18 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 MGD 18 Troubleshooting Guide Symptom Cause Solution Oven will not turn on display is blank No power at outlet Master On Off switch at rear of unit in the Off position 30 amp fuse is blown Verify voltage at outlet Check breaker in wall panel to make sure it is not tripped Put Master On Off in the ON position Check for broken element and Identify potential short to ground Replace fuse after issue is resolved Display shows Probe Alarm prb1 prb2 prb3 prb4 Control emits a continuous beep Temperature probe in zone is not responding Press any key to turn off the beep Check for loose connections to probes at terminal block and control board One heat zone will not turn on Possible burned out heater tube in zone Loose connection at terminal block see wire diagram Loose connection at heat relay or defective relay Examine all heater tubes in heat zone Check for physically broken heater tube or burned coil inside glass covering Inspect connections at terminal block and heat relays If possible swap heat relay with a working relay to see 1f heat comes on If heat comes on replace defective relay Display will not change from WARMING to REDY One heat zone may not be on Supplied voltage to oven may be too
12. b Heat Shutter 4 401188 Fuse 1 Amp 4XH40 1 401167 Tray Load Up 1 305774 Fuse Holder 1 Amp 1 401148 Tray Unload 1 100206 Socket Motor Relay 1 401170 Crumb Tray Assembly 2 100212 Relay Motor 24VDC DPDT 1 401157 Heat Shutter 2 305755 Digital Display Control 1 401152 Heater Tube 208V 546W 12 204246 Probe Temperature 4 401154 Heater Tube 240V 546W 12 204247 Retainer Plate Heater Tube 4 305749 Page 17 of 18 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 ASSEMBLY EXPLODED VIEW
13. er board or drive motor Drive motor defective Check for and clear any obstructions in conveyor belt Verify there is 24 volts AC from controller to speed board Verify voltage signal from speed board to driver board Verify DC voltage to drive motor from drive board Check 1 amp fuse at rear of oven to make sure it is not blown Check DC power supply to make sure it is providing 24 VDC to drive board For additional assistance contact Belleco s Factory Service Team at 877 854 8006 Continued page 5 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 TROUBLE SHOOTING CONTINUED Page 5 of 18 CONVEYOR DRIVE SYSTEM FLOW CHART RSS 212 MAIN CONTROL PANEL Recives 24 VAC from the AC transformer through the two blue wires at connection J38 on the board Motor drive board receiveds 24 VDC at terminals L1 and L2 from the DC power supply The Current is sent to the DPDT voltage signal received from the relay fromthe main control Speed Board is transmited to board to determin conveyor belt the conveyor drive motor from travel direction termonals A1 amp A2 Conveyor speed is determined by the amount of voltage recieved from the motor Drive Board From connectioin J12 on RSS 212 black and white wires carry a pulse signal to the Conveyor Speed Board 80144 24 VAC is supplied from the AC transformer to the board through the green wires The pulse signal is converted to a voltage signal and is carried
14. from Conveyor Speed Board 80144 to terminals 51 amp 52 on Motor Drive Board through the black and white wires Note refer to page 9 for component layout Continued page 6 DISCONNECT UNIT FROM POWER SUPPLY Check to see if conveyor belt can be moved by hand If conveyor can be moved remove small side panel at rear of unit apposite digital display control Check forloase drive chain or loose sprocket on motor or conveyor drive shaft Tighten loose sprocket or replace drive chain if necessary FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 CONVEYOR WILL NOT TURN If conveyor belt cannotbe moved check for obstructions and remove them If no obstructions are found proceedto next step Check 1 amp fuse next to power cord at back of oven to seeif it is electrically open If fuseis open call Bellecoas one or more drive components may require servicing If fuseis not electrically open remove bottom right control box cover to access the drive componnents and proceed to next steps Page 6 of 18 Check incoming power to the Conveyor Speed Board through the two green wires Board should be receiving 24 VAC from the AC transformer If no power verify connections at the terminal block and connector on board POWER TO DRIVE MOTOR CONNECTIONS AT TERMINAL BLOCK3 DETECTED Replace drive motor ALL ELECTICAL BOARDS OPERATING CORRECTLY Check connections for drive motor lead at termin
15. low i e 240 volt oven running on 208 volts Examine heat zones to be sure all elements are working Factory default temperatures are set at 350 F Verify voltage at the outlet Supplied voltage must match rating on data label Display changes from WARMING to HEATING and does not read REDY Temperature threshold has been reached Reduce zone temperatures to allow the elements to cycle If zone temperatures are set above 455 F the oven changes to heating mode as the elements are now at full intensity and will not cycle on and off Due to airflow and heat zones most products can be cooked at lower temperatures Conveyor will not reverse direction Obstruction in conveyor belt Speed button has not been pressed Relay for drive system is not engaging Check for and clear obstructions in conveyor belt Press and hold speed button until unit beeps once then release button Conveyor will stop and after approximately 10 seconds conveyor will reverse direction Replace relay Conveyor speed will not change Set button not pressed after setting new speed Driver board defective Once new conveyor speed has been entered press the set key to save changes Verify signal to the driver board and replace board if necessary see troubleshooting on page 6 Conveyor will not turn heat works Obstruction in conveyor belt No power to speed board from control No voltage signal to driv
16. motor WD042 BELLECO INC DRAWN BY MICHAEL CLAVET SYSTEM WIRE DIAGRAM FOOD EQUIPMENT SPECIALISTS MDG 18 OVEN P O BOX 880 208 240 VOLT SACO ME 04072 DATE 08 23 2013 SINGLE PHASE z warranty mclavet wirediagram mgdov htdiag ds4 Page 16 of 18 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 PARTS LIST DESCRIPTION QTY PART No DESCRIPTION QTY PART No Drive Motor 1 401215 Relay Heaters 24VDC SPDT 4 401156 Sprocket Driven 25B 24 x 3 8 1 401304 Socket Heat Relay 4 401171 Sprocket Drive 25B11 x 5 16 1 401301 Clip Heater Relay 8 401172 Chain Ladder Drive 21 4 1 401399 Fuse 30 Amp KTK R 30 600V 1 401169 Conveyor Drive Shaft 1 201987 Fuse Holder w Wires 1 202051 Conveyor Idler Shaft 1 201986 Power Switch Push Button Red 1 202052 Conveyor Belt 82 5 1 201987 Toggle Main Power Switch 1 401116 Support Conveyor Belt 1 401370 Switch Hi Limit Reset 1 401100 Quick Clips Master Links 4 401337 Switch Fan Motor 1 401107 Bushing Spring Loaded 2 401353 Motor Fan 2 401211 Conveyor Speed Board 24V 1 401153 Guard Fan Motor 2 401220 Spring Front Busing Idler Shaft 2 400263 Cord Fan Motor 1 401060 Motor Control Board 24VDC 1 401163 Cord Power 10 3 6 30P 1 401059 Rear Bushing Assembly 3 8 2 201101 Contactor 6X566 1 401136 Power Supply 24VDC 1 401164 Leg 4 Metal 4 400301 Transformer 24VAC 1 401155 Kno
17. rom side of the heat relay coils for the AC transformer each heat zone through the relay bases to terminal block through the two blue white black blue and green number 3 then back to wires at connection pies ps connection J13 through the rown wire J38 on the board energizing the coil and closing the open relay contacts 208 or 240 volt current from Current passes through the closed relay contacts om deu Current exits each heat zone terminal number six to terminal at terminal block number one back to the Main Relay number three on each relay to terminal number six on the through terminal block base and energizes each heat Wei number five zone though terminal block y number 8 Note refer to page 9 for component layout Continued page 8 Page 8 of 18 FIELD SERVICE MANUAL CONVEYOR OVEN MODEL MDG 18 ONE OR MORE HEAT ZONES WILL NOT WORK MAIN POWER RELAY WILL NOT ENGAGE DISCONNECT UNIT FROM POWER SUPPLY Using wire diagram check connections to relay coil and terminal block number 6 and 7 Check Main Power Relay to make sureit is engaging when Main Power Switch is turned on MAIN POWER RELAY ENGAGES DISCONNECT UNIT FROM POWER SUPPLY INSPECT ELEMENTS IN AFFECTED ZONES FOR BREAKAGE OR BURNED COILIN GLASS ALL CONNECTIONS TORELAY BASES ARE GOOD Inspectrelay s for signs of arcing at the contacts and replace relay s if necessary RELAYS DO NOTNEED REPLACING Using
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