Wells M4200-4 Service Manual

Place this chapter in the OVEN section of the equipment manual.

WELLS MANUFACTURING

10 Sunnen Dr., St. Louis, MO 63143

telephone: [phone]

fax: [phone]

www.wellsbloomfield.com

OWNERS MANUAL

VENTED

CONVECTION OVEN

MODEL

M4200-4

Includes
Installation
Use & Care

Programming

Exploded View

Parts List

Wiring Diagram

903

M4200 Convection Oven

This instruction is for the exclusive use of licensees

and employees of McDonalds Systems, Inc.

IMPORTANT: DO NOT DISCARD THIS MANUAL

This manual is considered to be part of the appliance and is to be given to the OWNER or
MANAGER of the restaurant, or to the person responsible for TRAINING OPERATORS of

this appliance. Additional manuals are available from your WELLS DEALER.

THIS MANUAL MUST BE READ AND UNDERSTOOD BY ALL PERSONS U S ING OR

INSTALLING THIS APPLIANCE. Contact your WELLS DEALER if you have any

questions concerning installation, operation or maintenance of this equipment.

p/n 2M-Z19624 Rev. B M903 150731

INTRODUCTION

IMPORTANT: Use only factory
authorized service parts.

For factory authorized service,
or to order factory authorized
replacement parts, contact your
Wells authorized service agency,
or call:

Wells Manufacturing

10 Sunnen Dr.,
St. Louis MO 63143 USA

Service Dept.

phone: [phone]
fax: [phone]

Thank You for purchasing this Wells Manufacturing appliance.

Proper installation, professional operation and consistent
maintenance of this appliance will ensure that it gives you the very
best performance and a long, economical service life.

This manual contains the information needed to properly install this
appliance, and to use and care for the appliance in a manner that
will ensure its optimum performance.

xi

M903 2M-Z19624 Owners Manual M4200-4

TABLE OF CONTENTS

GENERAL

OPERATION

PROGRAMMING

MAINTENANCE

SERVICE

AGENCY LISTING INFORMATION 1
WARRANTY 2
PRECAUTIONS & GENERAL INFORMATION 3
SPECIFICATIONS 4
INSTALLATION 5

FEATURES & OPERATING CONTROLS
OVEN FEATURES 8
SMART CONTROLLER 10
OPERATION
QUICK-GLANCE OPERATING GUIDE 12
DAILY SET-UP 13
COOK CYCLE OPERATION 14

PROGRAMMING

IMPORTANT:

Programming to be performed by Qualified Personnel ONLY!

ENTER PROGRAMMING MODE 15
CHANGE PROGRAMMED SETTINGS 16
INSTALL OPERATING SYSTEMS SOFTWARE 18
TRANSFER MENUS FROM CARD TO OVEN 19
TRANSFER MENUS FROM OVEN TO CARD 19
DEFAULT SETTINGS 20

CLEANING INSTRUCTIONS 21
TROUBLESHOOTING SUGGESTIONS 23
PREVENTATIVE MAINTENANCE 24
TEMPERATURE CALIBRATION 25
HINGE ADJUSTMENT

EXPLODED VIEW and PARTS LIST 26
WIRING DIAGRAM M4200-4, 1 PHASE 30
M4200-4, 3 PHASE 31
M4200-4, 380/415 32
PARTS & SERVICE 33
CUSTOMER SERVICE DATA FORM 33

This appliance conforms to NSF Standard 4 for sanitation only if

installed in accordance with the supplied Installation Instructions and

maintained according to the instructions in this manual.

M4200 (domestic) ovens are and listed under UL File E6070

M903 2M-Z19624 Owners Manual M4200-4

for 208V and 240V.

M4200EU (European) ovens comply with standards

for 380-415V 3NAC

1

AGENCY LISTING INFORMATION

STD 4

E6070

E6070

LIMITED WARRANTY STATEMENT

The

M4200 Convection Oven
to McDonald's, Inc. is warranted against defects in materials
and workmanship for a period of three years parts & one
year labor from the date of installation (
installation punch-tag on the equipment
the original purchaser:

All other equipment manufactured by WELLS for sale to
McDonald's, Inc. is warranted against defects in materials
and workmanship for a period of one year from the date of
installation (
equipment

as indicated by the installation punch-tag on the

),

and is for the benefit of the original purchaser:

THE FOREGOING OBLIGATION IS EXPRESSLY GIVEN
IN LIEU OF ANY OTHER WARRANTIES, EXPRESSED OR
IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE, WHICH ARE HEREBY EXCLUDED.

WELLS SHALL NOT BE LIABLE FOR INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES OR LOSSES FROM ANY
CAUSE WHATSOEVER.

This warranty is void if it is determined that upon inspection
by an Authorized Service Agency that the equipment has

manufactured by WELLS for

as indicated by the

), and is for the benefit of

sale

The prices charged by Wells for its products are based upon
the limitations in this warranty. Seller’s obligation under this
warranty is limited to the repair of defects without charge by
a Wells Authorized Service Agency or one of its sub­agencies. This service will be provided on customer’s prem­ises for non-portable models. Portable models (a device
with a cord and plug) must be taken or shipped to the
closest Authorized Service Agency, transportation charges
prepaid, for services.

In addition to restrictions contained in this warranty, specific
limitations are shown below (Additional Warranty
Exclusions). Authorized Service Agencies are located in
principal cities.

This warranty is valid in the United States & Canada and
void elsewhere. Please consult your classified telephone
directory or your food service equipment dealer; or, for infor­mation and other details concerning warranty, write to:

Wells Manufacturing

10 Sunnen Dr., St. Louis MO 63143 USA

phone [phone] or fax [phone]

for information and other details concerning warranty.
been modified, misused, misapplied, improperly installed, or
damaged in transit or by fire, flood or act of God.
It also does not apply if the serial nameplate has been
removed or unauthorized service personnel perform service.

SERVICE POLICY AND PROCEDURE GUIDE and ADDITIONAL WARRANTY EXCLUSIONS

1. Resetting of safety thermostats, circuit breakers, over
load protectors, and/or fuse replacements are not
covered by this warranty unless warranted conditions
are the cause.

2. All problems due to operation at voltages or phase
other than specified on equipment nameplates are
not covered by this warranty.
Conversion to correct voltage and/or phase must be
the customer’s responsibility.

3. All problems due to electrical connections not made

in accordance with electrical code requirements
and wiring diagrams supplied with the equipment are

not covered by this warranty.

4. Replacement of items subject to normal wear, to
include such items as knobs, light bulbs; and, normal
maintenance functions including adjustments of
thermostats, adjustment of micro switches and
replacement of fuses and indicating lights are not
covered by warranty.

5. Damage to electrical cords and/or plug due to exposure

to excessive heat are not covered by this warranty.

6. Full use, care, and maintenance instructions supplied
with each machine. Noted maintenance and

preventative maintenance items, such as servicing and

SHIPPING DAMAGE CLAIM PROCEDURE

NOTE: For your protection, please note that equipment in

this shipment was carefully inspected and packaged by
skilled personnel before leaving the factory. Upon
acceptance of this shipment, the transportation company
assumes full responsibility for its safe delivery.
IF SHIPMENT ARRIVES DAMAGED:

1. VISIBLE LOSS OR DAMAGE: Be certain that any

visible loss or damage is noted on the freight bill or
express receipt, and that the note of loss or damage is
signed by the delivery person.

2. FILE CLAIM FOR DAMAGE IMMEDIATELY:
Regardless of the extent of the damage.

cleaning schedules, are customer responsibility. Those
miscellaneous adjustments noted are customer
responsibility. Proper attention to preventative
maintenance and scheduled maintenance procedures
will prolong the life of the appliance.

7. Travel mileage is limited to fifty (50) miles from an
Authorized Service Agency or one of its sub-service
agencies.

8. All labor shall be performed during regular working
hours. Overtime premium will be charged to the buyer.

9. All genuine Wells replacement parts are warranted for
ninety (90) days from date of purchase on non­warranty equipment. This parts warranty is limited only
to replacement of the defective part(s). Any use of

non-genuine Wells parts completely voids any

warranty.

10. Installation, labor, and job check-outs are not

considered warranty and are thus not covered by this
warranty.

11. Charges incurred by delays, waiting time or operating

restrictions that hinder the service technician’s ability to
perform service are not covered by warranty. This
includes institutional and correctional facilities.

3. CONCEALED LOSS OR DAMAGE: if damage is
unnoticed until the merchandise is unpacked, notify the
transportation company or carrier immediately, and file
“CONCEALED DAMAGE” claim with them. This
should be done within fifteen (15) days from the date
the delivery was made to you. Be sure to retain the
container for inspection.

Wells cannot assume liability for damage or loss incurred in
transit. We will, however, at your request, supply you with
the necessary documents to support your claim.

M903 2M-Z19624 Owners Manual M4200-4

2

PRECAUTIONS AND GENERAL INFORMATION

This appliance is intended for use in commercial establishments
only.

This appliance is intended
No other use is
agents.

Operators of this appliance must be familiar with the appliance use,
limitations and associated restrictions. Operating instructions must be
read and understood by all persons using or installing this appliance.

Cleanliness of this appliance is essential to good sanitation. Read and
follow all included cleaning instructions and schedules to ensure the
safety of the food product.

Disconnect this appliance from electrical power before performing any
maintenance or servicing.

DO NOT submerge this appliance in water. This appliance is not jet
stream approved. Do not direct water jet or steam jet at this appliance,
or at any control panel or wiring. Do not splash or pour water on, in or
over any controls, control panel or wiring. Do not wash floor around
this appliance with water or steam jet.

Exposed surfaces of this appliance can be hot to the touch and may
cause burns.

Do not operate this appliance if the control panel is damaged. Do not
operate this appliance if the keypad section of the control panel is torn
or broken. Call your Authorized Wells Service Agent for service.

The technical content of this manual, including any wiring diagrams,
schematics, parts breakdown illustrations and/or adjustment
procedures, is intended for use by qualified technical personnel.

Any procedure which requires the use of tools must be performed by a
qualified technician.

This manual is considered to be a permanent part of the appliance.
This manual and all supplied instructions, diagrams, schematics, parts
breakdown illustrations, notices and labels must remain with the
appliance if it is sold or moved to another location.

This appliance is made in the USA. Unless otherwise noted, this
appliance has American sizes on all hardware.

recommended or authorized by the manufacturer or its

to prepare food for human consumption.

WARNING:

SHOCK HAZARD

All servicing requiring
access to non-insulated
electrical components
must be performed by a
factory authorized
technician.
DO NOT open any access
panel which requires the
use of tools. Failure to
follow this warning can
result in severe electrical

shock.

CAUTION:

RISK OF
DAMAGE

DO NOT connect or
energize this appliance
until all installation
instructions are read and
followed. Damage to the
appliance will result if
these instructions are not
followed.

CAUTION:

HOT SURFACE

Exposed surfaces can be hot
to the touch and may cause
burns.

M903 2M-Z19624 Owners Manual M4200-4

3

SPECIFICATIONS

25 1/8”

638 mm

20”

508 mm

DOOR SWING

MAX

30 1/8”

765.2 mm

2 5/8”

67 mm

OVEN CAVITY

Wide: 14-3/8” (365 mm)

Deep: 21” (533 mm)

High: 20” (508 mm)

25 1/4”

641 mm

2”

51 mm

Cord

Hanger

Power

Supply

Cord

6 3/16”

157 mm

OVEN GUIDE HOLDER

SPOTWELDED TO THE

OVEN DOOR

IL2956a

ELECTRICALSPECIFICATION

kW

Model Voltage Phase Hz

1 Ph 60 7.5 38
3 Ph 60 8.75 21.0 21.0 21.0
1 Ph 60 8.4 37
3 Ph 60 8.75 21.0 21.0 21.0

M4200-4

208V

240V

Total

Amps

1 Ph.

L1 L2 L3 N

380-415V 3NAC 50/60 8.75 11.7 11.7 11.7 1.0

Note: The unit is shipped from the factory wired for the voltage and phase on the nameplate,

It is not approved for field conversion.

4

M903 2M-Z19624 Owners Manual M4200-4

INSTALLATION

UNPACKING & INSPECTION

Carefully remove the appliance from the carton. Remove all
protective plastic film, packing materials and accessories from the
Appliance before connecting electrical power or otherwise performing
any installation procedure.

Carefully read all instructions in this manual before starting any
installation.

Read and understand all labels and diagrams attached to the
appliance.

Carefully account for all components and accessories before
discarding packing materials. Store all accessories in a convenient
place for later use.

COMPONENTS

3 ea. OVEN RACKS
2 ea. RACK SUPPORTS
1 ea. FAN BAFFLE

ACCESSORIES

1 ea. LITERATURE PACKAGE

OPTIONAL ACCESSORIES

21330 Caster Set
21445 Prep Top Kit
23035 Venting Duct Assembly Kit (single oven)
21342 Stacking kit for double ovens

SERVICE TECHNICIAN INSTALLATION NOTES

1. Installation and start up should be performed by an authorized
installation company. Installer must record installation particulars

on the CUSTOMER SERVICE DATA form on page 33 of this

manual.

2. Verify that this equipment installation is in compliance with the
specifications listed in this manual and with local code
requirements.

NOTE: DO NOT discard

the carton or other packing
materials until you have
inspected the appliance for
hidden damage and tested it
for proper operation.

Refer to SHIPPING DAMAGE
CLAIM PROCEDURE on the

inside front cover of this
manual.

WARNING:

RISK OF
INJURY

Installation procedures must
be performed by a qualified
technician with full knowledge
of all applicable electrical and
plumbing codes. Failure can
result in personal injury and
property damage.

IMPORTANT:
It is the RESPONSIBILITY
OF THE INSTALLER to
check with the AUTHORITY
HAVING JURISDICTION, in
order to verify compliance
with local codes and
ordinances for THIS
SPECIFIC EQUIPMENT
INSTALLATION.

M903 2M-Z19624 Owners Manual M4200-4

5

INSTALLATION (continued)

WARNING:

SHOCK HAZARD

All servicing requiring
access to non-insulated
electrical components must be
performed by a factory
authorized technician.
DO NOT open any access pan­el which requires the use of
tools. Failure to follow this
warning can result in severe
electrical shock.

NOTE: Oven is shipped with
biscuit baking adapter plate
attached to rear panel.
If oven is used exclusively for
bread products (bread, pies,
etc.), DO NOT remove adapter.

If oven is used for proteins,
install optional external vent
kit # WS-505504. Protein
requires additional venting to
decrease release of cooking
vapors when opening the door.

Vent Duct Installation

EQUIPMENT SET-UP

1. IF CONVECTION OVEN IS TO BE USED FOR PROTEINS,
INSTALL EXTERNAL DUCT
a. Remove 2 screws at each end of adapter plate on back of
oven.
b. Loosen 2 screws at bottom of adapter plate. Remove
adapter plate.
c. Slide bottom flange of vent duct over the two loosened screws.
d. Install four and tighten screws at ends of vent duct, then
tighten bottom screws.

2. CURB or COUNTER MOUNTING
a. Setup the appliance only on a firm, level, non-combustible
surface. Verify local codes for requirements. Concrete, tile,
terrazzo or metal surfaces are recommended. Metal over
combustible material may not meet code for non-combustible
surfaces.
b. Appliance is approved for installation with zero clearance at
bottom.
c. Recommend at least 3” clearance on sides and back to allow
adequate air flow.

3. INSTALLING OPTIONAL CASTERS (NOTE: casters are not
provided and must be purchased separately:
kits WS-21372 & WS-21373.)
a. Install casters, one on each corner of the appliance, in the
holes provided. Locking casters must be installed on the
FRONT of the appliance.
b. Set up the appliance only on a firm, level, non-combustible
surface. Verify local codes for requirements. Concrete, tile,
terrazzo or metal surfaces are recommended. Metal over
combustible material may not meet code for non-combustible
surfaces.
c. LEVELING: Verify that the appliance sits firmly on all four
casters when in its normal operational position. With a level,
check that the appliance is level front-to-back and side-to-side.

4. INSTALLING OPTIONAL LEGS (NOTE: Legs are not provided
and must be purchased separately: (Kit: WS-22829, set of 2)
a. Install adjustable legs, one on each corner of the appliance, in
the holes provided.
b. Set up the appliance only on a firm, level, non-combustible
surface. Verify local codes for requirements. Concrete, tile,
terrazzo or metal surfaces are recommended. Metal over
combustible material may not meet code for non-combustible
surfaces.
c. LEVELING: Verify that the appliance sits firmly ON ALL FOUR
LEGS. With a spirit level, check that the appliance is level
front-to-back and side-to-side.

5. OTHER OPTIONAL KITS
a. Kit 5F-21445 Prep Top allows the top of the M4200 to be used
as an NSF 4-compliant work surface.
b. Kit WS-21342 Oven Stacking Kit allows M4200 units to be
stacked 2-high.
c. Kit WS-505504 - Convert to protein oven.

M903 2M-Z19624 Owners Manual M4200-4

6

INSTALLATION (continued)

!

DANGER: SHOCK HAZARD

ELECTRICAL CONNECTIONS MUST BE MADE BY A

LICENSED ELECTRICIAN

Electrical shock will cause death or serious injury.

Refer to the nameplate on the front of the appliance.

• Verify the ELECTRICAL SERVICE POWER.

• Voltage and phase must match the nameplate specifications, and electrical

service amps must meet or exceed the specifications listed on page 1.

M4200 (domestic) field wiring must be no less than 10 AWG 4 conductor solid

copper wire, rated for at least 90ºC.

NOTE: Wire gauge, insulation type and temperature rating , as well as type,

size and construction of conduit, must meet or exceed applicable specifications
of local codes and of the National Electrical Code.

This appliance is equipped with a Hubbell L430P9 plug, which must be
plugged into a matching Hubbell L430R9 receptacle. The ground lug of the

receptacle must be connected to a suitable building ground.

M4200-EU (European) field wiring must have a minimum cross-sectional area of

1.5mm2.

IMPORTANT: An approved all pole power disconnect switch,

With at least 3 mm contact gap, must be supplied and installed in the fixed wir­ing in an accessible location (close proximity to the appliance) by a licensed
electrician.

EU INSTALLATION INSTRUCTIONS:

1. Using a screwdriver, remove terminal access panel located behind front

door marked: NOTICE - REMOVE THIS PANEL FOR TERMINAL BLOCK

2. Knock out the appropriate hole plug located on enclosure panel and

3. Thread supply leads through strain relief

4. Secure all connections and reinstall terminal access cover.

M903 2M-Z19624 Owners Manual M4200-4

5. “Equal Potential” grounding screw is located at rear of frame,

Remove screw and secure an appropriate grounding wire with
terminal.

NOTE: Strain relief supplied loose is for metal conduit connection.

For flexible power cords an approved strain relief fitting must be sup­plied by others.

connect conduit strain relief.

• Connect supply power lines to terminals marked: L1, L2, L3

• Connect the neutral line terminal marked: N

• Connect green-with-yellow-stripe lead to ground lug marked

marked

CAUTION:

RISK OF

DO NOT connect or energize
this appliance until all
installation instructions are
read and followed. Damage
to the appliance will result if
these instructions are not
followed.

DAMAGE

CAUTION:

SHOCK HAZARD

The ground lug of this
appliance must be connected
to a suitable building ground.

IMPORTANT:

Contact a licensed electrician to
install and connect electrical
power to the appliance.

IMPORTANT:

Damage due to being connected
to the wrong voltage or phase is
NOT covered by warranty.

IMPORTANT
PROGRAMMING NOTE:

This oven is pre-programmed
from the factory and normally
does not require programming
adjustments.

EU Connections

SUPPLY LINE 2

SUPPLY LINE 1

NEUTRAL

GROUND

L3SUPPLY LINE 3

L2

L1

N

IL2357

7

FEATURES & OPERATING CONTROLS

M4200 CONVECTION OVEN FEATURES

8

M903 2M-Z19624 Owners Manual M4200-4

FEATURES & OPERATING CONTROLS (continued)

ITEM DESCRIPTION FUNCTION

A. OPTIONAL PREP TOP Allows top of oven to be used as a work surface

B. OVEN TOP Covers and protects top insulation

C. OVEN DOOR Covers and provides access to oven cavity

D1. DOOR HANDLE Safe hand hold to open or close oven.
D2. DOOR STRIKER & LATCH Striker and door- mounted latch hold oven door closed

E. ACCESS PANEL Covers and provides access to fan motor and electric
connections and controls

F1. COOLING FAN INLET Provides air circulation for cooling. DO NOT spray or pour
F2. COOLING LOUVERS water into cooling fan inlet or louvers

G. POWER CORD
(not provided on EU models) Supplies power from receptacle to oven

H. CORD HANGER Provides storage for cord when moving oven

I. EXTERNAL CAVITY VENT Cooking fumes are vented here

J. OPTIONAL FRONT CASTERS Allow oven to be easily moved; locking to stabilize oven
when in position

K. OPTIONAL REAR CASTERS Allow oven to be easily moved.

L. POWER FUSES Protect electrical circuits from overload

M. DATA PLATE Provides manufacturer, model and serial number information.
Also, provides electrical specifications and requirements

N. POWER PLUG
(not provided on EU models) Plugs into power receptacle

P. CARD READER Reads menu card

Q. MENU CARD Contains default information; used to reprogram smart
controller with default settings in the event of program errors

R. ON/OFF SWITCH Energizes appliance

S. SMART CONTROLLER Controls cooking times and temperatures; selectable
pre-programmed settings.
DO NOT spray or pour water into controller

T. BEEPER Audible indicator for alarms, end-of-cycle, etc.

U. RACK SUPPORTS Hold cooking racks

M903 2M-Z19624 Owners Manual M4200-4

V. PRODUCT RACK Holds product to be cooked

W. HEATING ELEMENTS Provide cooking heat when energized

X. FAN Circulates heated air during cooking

Y. FAN BAFFLE Covers fan, also provides mounting for right rack support

9