Specifications

ManualsBrandsWells ManualsConvection OvenM4200

CONVECTION OVEN

WELLS MODELS WITH TOUCHPAD TEMPERATURE CONTROLLER/TIMERS

M4200-3, M4200-3S

This equipment chapter is to be inserted in the Oven section of the Equipment Manual.

MANUFACTURED EXCLUSIVELY FOR

McDONALD'S BY

WELLS MANUFACTURING COMPANY

2 ERIK CIRCLE VERDI, NEVADA 89439

PHONE: (702) 345-0444 TOLL FREE: (800) 777-0450

FAX: (702) 345-0569

FAX: (800) 356-5142 (FOR ORDERS ONLY)

TABLE OF CONTENTS ............................................................................................................Page 1

WARRANTY .............................................................................................................................Page 2

INTRODUCTION SAFETY........................................................................................................ Page 2

PARTS IDENTIFICATION/FUNCTION/PHOTOS........................................................................ Page 3

HARDWARE IDENTIFICATION .............................................................................................. Page 15

EQUIPMENT SET UP AND CLOSE PROCEDURES ................................................................ Page 16

TROUBLESHOOTING ............................................................................................................ Page 19

ORDERING/SERVICE INFORMATION.................................................................................... Page 20

NON-SCHEDULED MAINTENANCE ....................................................................................... Page 20

WIRING PICTORIAL/WIRING DIAGRAM ................................................................................ Page 31

WARRANTY STATEMENT..................................................................................................... Page 32

The M4200-3 and M4200-3S Convection Ovens manufactured by Wells Manufacturing are warranted to be free

from defects in materials and workmanship for a period of one year from the date of original installation and is for

the benefit of the original purchaser only, BUT NOT AGAINST DAMAGE CAUSED BY ABUSE, FAULTY

INSTALLATION, INCLUDING IMPROPER ELECTRICAL CURRENT. THIS WARRANTY IS THE COMPLETE

AND ONLY WARRANTY, THERE BEING NO OTHER WARRANTY, EXPRESSED OR IMPLIED IN LAW OR IN

FACT, INCLUDING BUT NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY

PARTICULAR PURPOSE, AND/OR FOR DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES IN

CONNECTION WITH WELLS PRODUCTS.

Wells' obligation under this warranty is limited to the repair of defects or replacement without charge by a WELLS

factory authorized service agency or one of its sub-service agencies. This service will be provided on customer's

request. Please contact the Service Department: Wells Manufacturing Company, P.O. Box 280, Verdi, Nevada,

89439; to arrange service or additional information and other details concerning the product and/or this warranty.

This manual is for the exclusive use of licensees and employees of McDonald's Systems, Inc.

Printed in July EM 05

Printed In The United States of America

Summary of content (36 pages)

PAGE 1
CONVECTION OVEN WELLS MODELS WITH TOUCHPAD TEMPERATURE CONTROLLER/TIMERS M4200-3, M4200-3S This equipment chapter is to be inserted in the Oven section of the Equipment Manual. MANUFACTURED EXCLUSIVELY FOR McDONALD'S BY WELLS MANUFACTURING COMPANY 2 ERIK CIRCLE VERDI, NEVADA 89439 PHONE: (702) 345-0444 TOLL FREE: (800) 777-0450 FAX: (702) 345-0569 FAX: (800) 356-5142 (FOR ORDERS ONLY) TABLE OF CONTENTS .......................................................................................................
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CONVECTION OVEN Model M4200-3S ELECTRICAL INFORMATION Voltage: 208V OR 240V, three phase. Power: 208V: 7.5 KW, 21.8 amps per line maximum. 204V: 8.4 KW, 21.2 amps per line maximum. Oven is provided with a low profile pin-and-sleeve plug (L43-30P9). PRODUCT FEATURES • Six-channel built-in timer. • Solid-state temperature controller with on-demand digital temperature display maintains accurate temperature. • Stainless steel interior and exterior for durability and easy cleaning.
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ELECTRICAL SPECIFICATIONS: VOLTS KW AMPS PER LINE THREE PHASE L1 L2 L3 208 7.5 20.8 21.8 21.8 M-4200-3 240 8.4 20.2 21.2 21.2 M4200-3S 208 7.5 20.8 21.8 21.8 240 8.4 20.2 21.2 21.2 NEMA PLUG CONFIGURATION Wells Manufacturing Company 2 Erik Circle, P.O. Box 280 • Verdi, NV 89439 (702) 345-0444 FAX: 702-345-0569 TOLL-FREE FAX: 800-356-5142, for orders only 1994 Wells Manufacturing Company Printed in U.S.A. 1a Item No.
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INTRODUCTION These commercial Convection Oven Models M42003 and M4200-3S are designed to bake food products uniformly and economically. They incorporate stateof-the-art, solid-state electronic controls for controlling the cooking temperature and time. The M4200-3 and M4200-3S are 7.5 KW ovens. The M4200-3S is the stackable model of the oven. equipment is properly grounded. • If you find that the power cord is frayed, do not plug it into the power receptacle.
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ITEM PART NO. 1 21445 Prep-top Assembly 1 Pre-assembled parts no. 1A, 2, 3. 1A 63952 Prep-top (TOP) 1 Provides working surface. *2 63953 Prep-top insulation 2 Thermal Barrier for the prep-top. *3 63950 Prep-top (Bottom) Cover 1 Protects prep-top insulation. 4 63788 Oven top 1 Covers and protects top insulation. 5 65145 Heat ON Light (amber) 1 Indicates oven is heating. 6 63918 ON/OFF/FAN Switch 1 Turns the electrical power ON, OFF, or FAN only.
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ITEM PART NO. 11 63828 Prep-top mounting bracket (not on M4200-3S) 4 Brackets securing prep-top to the oven. 12 63913 Door Pin Cover 2 Allows access to the door hinge pin. 13 63790 Side panel (left & right) 2 Covers and protects oven sides. 14 65156 Door Assembly 1 Covers and provides access to oven cavity. 15 63946 Door Handle and Latch Assembly 1 Provides access to the oven cavity and secures the door closed.
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ITEM PART NO. 19 63827 Cord Hanger 1 Bracket for Power Cord storage. 20 63766 Rear Access Cover 1 Allows access to main power supply connection and high voltage components. 21 21486 Power Cord Assembly 1 Pre-assembled parts no. 22, 23, 25. 22 56324 Power Cord 10/4, Type 50 1 Transfers electric power to the unit. 23 65501 Plug LP-430P9 1 Connects oven to the electrical power supply. 24 65583 Right Rear Panel 1 Covers high voltage components from the rear.
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ITEM PART NO. 30 63817 Top and Bottom Door Gasket 2 Seal to retain the interior oven environment. 31 64504 Interior Air Baffle 1 Uniformly dispenses heated air throughout the oven. 32 63820 Side Door Gasket 2 Seal to retain the interior oven environment. 33 21375 Oven Rack Supports 2 Supports oven racks. 34 21376 Oven Rack 3 Supports product pans. DESCRIPTION QTY.
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ITEM PART NO. DESCRIPTION 35 63829 Heating Element Bracket 6 Holds the heating elements to the inner cavity. 36 63836 Inner Heat Gasket Cover 1 Protects and secures the heating element gasket. *37 63834 Heating Element Gasket 2 Element thermal seal to retain the inner cavity environment. 38 63881 High-Limit Top Clip 1 Secures the high-limit thermostat bulb in place. 39 63883 High-Limit Bottom Clip 1 Secures the high-limit thermostat bulb in place.
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ITEM PART NO. 44 63873 Outer Heating Element (208 Volt Oven) 1 63949 (240 Volt Oven) 1 63866 Center Heating Element (208 Volt Oven) 1 63800 (240 Volt Oven) 1 63872 Inner Heating Element (208 Volt Oven) 1 63783 (240 Volt Oven) 1 47 63797 Blower Wheel 1 Circulates heated air throughout the oven cavity. 48 51040 Bushing 1 Protects electrical wiring to the door ajar switch. 49 65647 Ajar Switch Shield 1 Protects the switch from interior oven heat.
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ITEM PART NO. DESCRIPTION QTY. 53 65211 High-Limit Thermostat 1 Safety device which prevents excessive oven temperatures. 54 63840 High-Limit Bracket 1 Supports the high-limit thermostat. 55 63898 Control Panel Hinge Bracket Assembly 2 Provides pivot shaft to the control panel. 56 63897 Angle Frame Pin Hinge 2 Secures the control panel to the oven and allows it to pivot open. *57 63907 Wire Harness Stand-Off 1 Secures wire harness at the front of the unit.
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ITEM PART NO. 58 63880 Relay 1 Turns the fan and heat OFF when the door is ajar. 59 63929 Transformer 1 Provides low voltage power to the electronic controls. 60 63849 Insulation Cavity Wrap 1 Thermal barrier for interior cavity. 61 63755 Frame Assembly 1 Substructure of oven. 62 57465 Power Terminal Block 1 Connection block for the main power supply to the unit. 63 61439 Ground Connection Lug 1 Connection for the external unit ground from the main power supply.
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ITEM PART NO. 66 63837 Outer Heater Gasket Cover 1 Protects and secures the heating element gasket in place. 67 64957 7.5 KW Heater Harness (M4200-3 and -3S) 1 Transfers electrical power to the heating elements. 68 51040 Bushing 1 Protects wiring to the motor, 69 63932 Fan Motor 208/240V 1/4 H.P., 1800 RPM 1 Rotates air movement fan. 70 63811 Motor Mount 1 Used to hold motor in position. 71 65166 Main Wire Harness 1 Provides electrical connection to control components.
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ITEM PART NO. DESCRIPTION 73 63860 Door Top Hinge Bracket 1 Attaches the door to the oven and is used for door adjustment. 74 63887 Door Top Hinge Pin 1 Holds the door to the upper hinge bracket. QTY.
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ITEM PART NO. *75 63912 Bottom Door Hinge Pin 1 Holds the door to the bottom hinge bracket assembly. 76 63900 Bottom Hinge Sleeve 1 Door alignment adjustment sleeve. 77 63899 Hinge Pivot Cover 1 Covers the frame around the bottom door hinge. 78 63896 Door Bottom Hinge Bracket Assembly 1 Attaches the door to the oven and allows it to open. DESCRIPTION QTY.
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ITEM PART NO. DESCRIPTION QTY. 79 65238 Air Duct Assembly 1 Thermal barrier to the rear exhaust vent. 80 63927 Thermocouple 1 Sensor for interior oven temperature. 81 65127 24" (61 cm) Sleeving 1 Protects thermocouple wire. *82 21342 Oven Stacking Kit (M4200-3S only) 1 Used to secure the oven on top of another oven. *83 21330 Caster Kit (For M4200-3S ovens only) 1 Kit of parts to provide mobility to the M4200-3S oven.
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HARDWARE IDENTIFICATION ITEM PART NO.
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EQUIPMENT SET-UP AND CLOSE PROCEDURES Set-up 1. Make sure the power cord is plugged into the appropriate receptacle. 2. Place the 3 product racks in the 2, 5, and 8 rack support positions. 3. Place the ON/OFF/FAN switch in the ON position. The red power ON light will come ON. 4. Check oven set temperature. Press and hold the temp button for 5 seconds or until the screen flashes the current set temperature in degrees.
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2. Place the ON/OFF/FAN switch in the ON or FAN position. 7. The maximum temperature the controller can be programmed for i s 500° F (260 °C), although the actual oven temperature displayed may read as high as 600° F (316 °C). If an attempt is made to program the controller for temperatures higher than 500° F (260 °C), the controller will automatically adjust the oven set temperature to 500 °F (260°C). 3.
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CALIBRATION 12. Press the temp button to record the new setting and to exit the calibration mode. Tools: Digital Thermometer with Oven Probe; Oven Mitt. 1. Be sure the oven is plugged into the appropriate power supply receptacle. 13. Place the ON/OFF/FAN switch to the OFF position. 2. Open the oven door and clamp the oven probe in the center of the middle rack. A. Pass the oven probe wire between the door and the door gasket. Close the door. B. Plug the oven probe wire into the digital thermometer. 3.
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PROBLEM TROUBLESHOOTING PROBABLE CAUSE ON/OFF/FAN switch is in No power to the unit. the ON or FAN position and oven fails to operate. (No Red Power ON Light operating) Faulty ON/OFF/FAN switch. CORRECTIVE ACTION Verify power connection, check circuit breaker. Call service agency. Oven temperature too high, high-limit thermostat has tripped. Faulty high-limit thermostat. Check setting and calibration or the temperature controller, allow oven to cool and reset the high-limit thermostat.
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PROBLEM Product is burning. Product is not cooked. Time display readout does not work. Time program cannot be changed. PROBABLE CAUSE CORRECTIVE ACTION Temperature set too high. Check temperature setting. Temperature controller out of calibration. Check temperature controller calibration. Timer set to the wrong time for the product. Temperature set too low. Check timer setting. Temperature controller out of calibration. Check temperature controller calibration. Oven not operating.
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NOTE: The wiring diagram is located on the inside of the right side panel of the oven. In order to use it, the right side panel must be removed, but only after the unit has been unplugged from the power supply receptacle. NOTE: Loctite #242 should be applied to all threaded hardware parts before reassembly (except electrical wire connection terminals). NOTE: Extra care is required when reinstalling selftapping screws to avoid stripping of the threads. 11.
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2. Using the phillips screwdriver, turn the 2 captive screws at the upper and lower left-hand side of the control panel until the panel is released. Then swing the panel open. NOTE: The screws will remain with the panel. 3. Disconnect the wire leads from the rear of the ON/OFF/FAN switch. by lifting it at the bottom and pulling it up and out. 3. Remove the top high-limit thermostat clip by removing the 2 screws holding it in place. (See Figure 4) TOP HIGH-LIMIT THERMOSTAT CLIP 4.
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6. Remove the thermostat capillary and bulb from the inside of the oven and remove the high-limit thermostat from the oven. (See Figure 5) ADJUSTMENT/REPLACEMENT OF THE DOOR AJAR SWITCH (Should be done by a qualified service person) Tools: Phillips Head Screwdriver, 1/16^ (2 mm) Flatblade Screwdriver. NOTE: Adjust the thermostat body on the support bracket so that the red trip-plunger is centered and extends 1/8" (3 mm) through the hole in the front control panel. Parts: Door Ajar Switch. 1.
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(See Figure 8) C. Repeat until the door ajar switch functions properly. NOTE: It is possible to adjust the door ajar switch such that it will interfere with the reinstallation of the lower front trim piece. WARNING: Make sure that the door ajar switch shield is in place prior to reinstalling the lower front trim piece. Failure to do so may cause the switch to malfunction. To Decrease the Switch Sensitivity: B. Disconnect the switch leads from the wire harness and remove the switch from the oven. C.
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REPLACEMENT OF THE FAN MOTOR (Should be done by a qualified service person) Tools: Phillips Head Screwdriver, 5/32" (3 mm) Hex-Key Wrench, 8" (20,3 cm) Adjustable Wrench, Short Handle Flatblade Screwdriver. Parts: Fan Motor. 1. Unplug the power cord. WARNING: Failure to do so will result in electrical shock. 2. Remove the racks, rack supports, and interior air baffle from the oven interior. 3. Loosen the 2 hex-key set screws on the blower wheel and remove the wheel from the motor shaft.
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2, Using the phillips screwdriver, turn the 2 captive screws at the upper and lower left-hand side of the control panel until the panel is released. Swing the panel open. 2. Remove the rear access cover by removing 6 screws. NOTE: The screws will remain with the panel. 3. Using the long nose pliers, disconnect the electrical wire connections, and unscrew the thermocouple wires. (See Figure 13) 4. Using the nut driver, remove 4 hex-nuts and remove the oven controller. (See Figure 13) 5.
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REPLACEMENT OF THE HEATING ELEMENT(S) (Should be done by a qualified service person) 5. Disconnect the wires from the element(s) that are to be removed. (See Figure 17) Tools: Phillips Head Screwdriver, 3/8" (10mm) Open End Wrench, 11/32" (8 mm) Nut-driver. NOTE: The inner 2 connections are for the outer heating element, the center 2 connections are for the center heating element and the outer 2 connections are for the inner heating element. Parts: Heating Element (outer). Heating Element (center).
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REPLACEMENT OF THE LOW VOLTAGE POWER TRANSFORMER (Should be done by a qualified service person) 8. Remove the heating element(s) by pulling it straight out from the side of the cavity. 9. Reverse the procedure and use the wiring diagram to install the new heating elements). Tools: Phillips Head Screwdriver, Needle Nose Pliers. Parts: Transformer. REPLACEMENT OF THE POWER AND HEAT ON LIGHTS 1. Unplug the power cord. Tools: Phillips Head Screwdriver, Needle Nose Pliers.
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ADJUSTMENT OF THE DOOR (TOP TO BOTTOM) 5. Once the proper adjustment has been made replace the lower front trim. Tools: Phillips Head Screwdriver, 10" (25 cm) . adjustable wrench. Parts: None. 1. Unplug the power cord. WARNING: Failure to do so will result in electrical shock. 2. Remove the lower front trim by removing the 4 screws located on the sides of the trim piece. 3. TO RAISE THE DOOR A.
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DOOR TOO CLOSE TO THE GASKET Loosen the 2 outer bolts and turn the center bolt COUNTERCLOCKWISE to bring the door away from the door gasket. Secure it in place by tightening the 2 outer bolts. (See Figures 23 & 24) 5. Once the proper adjustment has been made, replace the lower front trim and the oven top.
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INSTALLATION INSTRUCTIONS For Converting an M4200 From 1 to 3 Phase 1. Warning: Be sure that all electrical power to the convection oven has been disconnected before proceeding. 2. Remove the right side panel as illustrated. This procedure may require the removal of either two 8-32 x 5/8" screws or four 8-32 x 5/8" screws depending on the model. To remove the side panel that has two screws requires the operator to lift it up and pull it out.
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Installation Instructions For Converting an M4200 From I to 3 Phase 4. With step 3 completed, remove the existing plug and strip the black cord jacket back to expose the red wire approximately 2". Slide the 90° adaptor (P/N 44256) over the cord. Be sure that all four wires are of the same length and strip the wire insulation back 1/2". Now connect the plug (P/N 43924) to the four wires. Be sure to place the green wire into the green lug of the plug. The remaining wires have no designated location.