Wells MDBC-1 Service Manual
Printed In All Rights Reserved
BISCUIT CABINET
WELLS MODEL MDBC-1
Place this chapter in the Cabinets Section of the Equipment
Manual.
MANUFACTURED EXCLUSIVELY FOR
McDONALD'S®
BY
WELLS MANUFACTURING 2 ERIK CIRCLE VERDI,
NEVADA 89439 PHONE: 1 (702) 345-0444 1 (800) 777-0450
TELEX: 170074
TABLE OF CONTENTS
WARRANTY................................................................................................................. Page 2
INTRODUCTION........................................................................................................... Page 2
SAFETY....................................................................................................................... Page 2
PARTS /IDENTIFICATION/PHOTO/FUNCTION ............................................................. Page 3
HARDWARE IDENTIFICATION....................................................................................Page 12
EQUIPMENT SET UP AND CLOSE PROCEDURES .....................................................Page 12
TROUBLESHOOTING .................................................................................................Page 12
ORDERING/SERVICE INFORMATION.........................................................................Page 15
NON-SCHEDULED MAINTENANCE ............................................................................Page 15
WIRING DIAGRAM......................................................................................................Page 20
WIRING PICTORIAL ....................................................................................................Page 21
This manual is for the exclusive use of licensees and employees of McDonald's Systems, Inc.
© 1985 McDonald's Corporation
Printed in September The United States of America
WARRANTY STATEMENT
This MDBC-1 Biscuit Cabinet Manufactured by
Wells is 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 (125 VOLTS,
AC). THIS WARRANTY IS THE COMPLETE AND
ONLY WARRANTY, THERE BEING NO OTHER
WARRANTIES, 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 or 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 for additional
information and other details concerning the
product and/or this warranty.
INTRODUCTION
This Commercial Biscuit Cabinet Model MDBC-1
is designed to hold food at the desired serving
temperature and moistness.
SAFETY
Knowledge of proper installation, operation and
maintenance procedures is essential to ensure
safe operation of any equipment. The instructions
in this chapter are meant as guidelines; major
considerations to be kept always in mind are:
1. Always have dry hands prior to turning
power switch on or off.
2. Turn off power switch anytime cabinet is not
in use.
3. If an electric shock is felt when touching the
cabinet, disconnect immediately. Call Wells
Service Department for repair.
4. Have electrical supply outlet installed by a
licensed electrician. Make sure that equipment is properly grounded.
5. If you find that the electrical cord is frayed,
DO NOT PLUG INTO A RECEPTACLE.
If it is already plugged in, disconnect the plug after
shutting off the circuit breaker.
6. DISCONNECT POWER CORD BEFORE
ATTEMPTING ANY REPAIRS AND/OR
CLEANING THE UNIT WITH WATER.
7. Allow unit to cool before cleaning.
8. DON'T EVER SPLASH WATER WITH A
HOSE OR OTHERWISE ONTO THE UNIT.
WET ELECTRICAL COMPONENTS AND
WIRING WILL PRESENT A SHOCK
HAZARD.
9. Follow cleaning procedures described on
the Planned Maintenance System, Card
#64.
10. CAUTION: Do not operate unit until the legs
are installed. Four (4) legs are provided and
can be installed by screwing into bottom of
unit as shown on page 10.
11. For biscuit table installation: Bolt unit legs to
table using four (4) 1/4-20 UNC x 1 1/4" long
bolts and four (4) 1 1/4" O. D. flat washers.
Apply Loctite #242 to the leg bolt threads
upon installation of the unit on to the table.
2
PARTS IDENTIFICATION/PHOTO/FUNCTION
ITEM PART NO. DESCRIPTION QTY. FUNCTION
1 60755 Cavity 1 Provides the Interior Surface of this Unit
2 61044 Right Side Panel 1 Outer Side of Unit
3 61043 Left Side Panel 1 Outer Side of Unit
4 60794 Crumb Shield 1 Prevents Crumbs From Falling into the water pan
5 60756 Air Heating Element 2 Heats the Air Inside of the Unit
6 60783 Cabinet Top 1 Covers and Protects Controls and Components
7 60786 Door Handle and Plate Assy 1
8 60804 Door Interior Panel 1 Secures the Door Gasket and Protects Insulation
9 60820 Door Gasket 1 Seal to Retain the Interior Environment
10 60790 Door 1 Allows Access to the Interior Cavity
Provides Access to Unit and Secures the Door when
Closed
3
ITEM
11 60779 Front Bottom Panel 1 Protective Front Cover
12 60752 Element Clip 2 Holds Element in Place
13 60789 Thermo Bracket 1 Protective Guard for the Air Sensor
14 60760 Right Tray Rack 1 Holds Right Side of Biscuit Tray
15 60760 Left Tray Rack 1 Holds Left Side of Biscuit Tray
16 60784 Bottom Cover 1 Protective Bottom Cover
17 61105 Air Probe Bracket 1 To Hold the Biscuit Oven Probe
PART
NO.
DESCRIPTION QTY. FUNCTION
4
ITEM PART NO. DESCRIPTION QTY. FUNCTION
18 60771 Rear Panel 1 Protective Rear Cover
19 61735 Lower Back Panel 1
20 60589 Strain Relief 1 Attaches Cord to Unit
21 61050 Cord Set 1 Transfer Electric Power to Unit
22 60809 Specification Plate 1
23 60590 Convenience Outlet 1
24 53068 Terminal Block 1 Distribute Power to Components
Electrical Components Mounting and Protective Lower
Back Cover.
Indicates Model Number, Serial Number and Electrical
Rating of the Unit
120V, 4 Amp, 500 Watt max. Outlet for limited Usage
Device. Electrically "hot" when cabinet cord is plugged
in.
5
ITEM PART NO. DESCRIPTION QTY. FUNCTION
25 60830 Plug 1
26 50169 Power Switch 1 Turns Electric Power On or Off to the Unit
27 60825 Water Telite (Amber) 1 Low Water Warning Light
28 60758 Power Telite (Red) 1 When Lit, Indicates the Power is On to the Unit
29 60763 Air/Water (Rocker) Switch 1
30 60563 Thermostat Telite (White) 2 Indicates Heater is On
31 60763 Mode (Rocker) Switch 1
Provides Access to Controls for Adjusting and Setting
the Temperatures
To Select Which System the Temperature Readout
Indicates. (Air or Water)
Set Temperature Displays in a Flashing Manner, the
Temperature at Which the Control is Set to Operate:
OR Displays the Actual Temperature
6
ITEM
PART
NO.
DESCRIPTION QTY. FUNCTION
32 60787 Door Hinge 2
33 60795 Control Panel 1 Used to Mount Electrical Control Components
34 50252 Terminal Block 1 To Distribute Power to the Components
35 54005 Jumper Strap 1 The Electrical Supply Neutral Terminal
36 60818 Transformer 1 Provides Low Voltage to the Printed Circuit Board
37 60964 Water Relay 1 Turns the Water Heater On and Off
38 60870 Air Relay 1 Turns the Air Heaters On and Off
Mounts Door to Cabinet and Allows the Door to Open
and Close
(2) (2X2)
33 / h. p, j
7
ITEM
39 60863 Wire Harness 1 Permits Connection of All Electrical Parts
40 60778 Rear Top Panel 1
41 60565 Label 1 Rating Size for Convenience Outlet (500 Watts max.)
42 60824 Top Insulation 1 Insulates Controls From the Heated Cavity
43 60816 Printed Circuit Board 1 Solid State Device. Controls All Functions
PART
NO.
DESCRIPTION QTY. FUNCTION
Electrical Components Mounting and Protective Upper
Rear Cover
44 60813 Spacer 4
Provides Required Spacing for Printed Circuit Board to
the Control Panel
8
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