Wells M4200 User manual

WELLS MANUFACTURING COMPANY
2 ERIK CIRCLE, P. O. Box 280
Verdi, NV 89439
Customer Service [phone] Ext.502
fax: [phone]
www.wellsbloomfield.com
903
p/n 45633 Rev.A M903 081100 cps
M4200
CONVECTION
OVEN
OWNER’S
MANUAL
OPERATING
INSTRUCTIONS
***
MAINTENANCE
INSTRUCTIONS
***
PARTS LIST
IMPORTANT: DO NOT DISCARD THIS MANUAL
This manual is considered to be part of the oven and is to be given to the owner or
manager of the restaurant, or to the person responsible for training operators of the
oven. Additional manuals are available from your Wells Dealer.
THIS MANUAL MUST BE READ AND UNDERSTOOD BY ALL
PERSONS USING OR INSTALLING THIS OVEN.
Contact your Wells Dealer if you have any questions concerning installation, operation
maintenance or servicing of this equipment.
This manual is for the exclusive use of licensees and employees of McDonalds Systems, Inc.

Allcommercialcookingequipmentmanufacturedby
WELLS MFG. CO. is warranted against defects in
materials and workmanship for a period of one year
from the date of original installation or 18 months
from the date of shipment from our factory, which-
ever comes first, and is for the benefit of the origi-
nal purchaser only.
THIS WARRANTY ISTHE COMPLETEAND ONLY
WARRANTY, EXPRESSED OR IMPLIED IN LAW
OR IN FACT, INCLUDING BUT NOT LIMITED TO,
WARRANTIES OF MERCHANTABILITY OR FIT-
NESSFORANYPARTICULARPURPOSE,AND/OR
FOR DIRECT, INDIRECT OR CONSEQUENTIAL
DAMAGESINCONNECTIONWITH WELLS MFG.
CO. PRODUCTS. This warranty is void if it is deter-
mined that, upon inspection by an authorized ser-
viceagency,theequipment has been modified, mis-
used, 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 if service is performed by unauthorized person-
nel.
The prices charged by Wells Mfg. Co.for its prod-
ucts 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 Mfg.
Co. factory authorized service agency or one of its
sub-service agencies. This service will be provided
on customer’s premises for non-portable models.
Portablemodels (adevicewithacord and plug)must
be taken or shipped to the closest authorized ser-
viceagency,transportationchargesprepaid,for ser-
vice. Inadditiontorestrictionscontainedinthiswar-
ranty, specific limitations are shown in the Service
Policy and Procedure Guide. Wells Mfg. Co. autho-
rized service agencies are located in principal cit-
ies. This warranty is valid in the United States and
Canada and void elsewhere. Please consult your
classified telephone directory, your foodservice
equipment dealer or write the Factory Service De-
partment, Wells Manufacturing Company, P.O. Box
280, Verdi, Nevada 89439, phone [phone]
or [phone], for information and other details
concerning warranty.
LIMITED WARRANTY STATEMENT
SERVICE POLICY AND PROCEDURE GUIDE
ADDITIONAL WARRANTY EXCLUSIONS
1. Resettingof safety thermostats,circuit breakers, overloadprotectors,and/orfuse replacementsarenot coveredbythis warranty unless
warrantedconditionsarethecause.
2. Allproblems due to operation at voltages or phase other than specified on equipment nameplates are not coveredbythiswarranty.
Conversiontocorrectvoltageand/or phase must be the customers responsibility.
3. All problems due to electrical connections not made in accordance with electrical code requirements and wiring diagrams
suppliedwiththeequipmentarenotcoveredbythiswarranty.
4. Replacementof itemssubject to normal wear,toinclude such itemsasknobs,light bulbs; and, normalmaintenancefunctionsincluding
adjustments of thermostats, adjustment of micro switches and replacement of fuses and indicating lights are not covered by warranty.
5. Fulluse,care,andmaintenanceinstructionsaresuppliedwitheachmachine. Notedmaintenanceandpreventativemaintenanceitems,
suchasservicingandcleaningschedules,arecustomerresponsibility. Those miscellaneousadjustmentsnoted are customer
responsibility. Proper attention to preventatve maintenance and scheduled maintenanceprocedures will prolong the life of the machine.
6. Travel mileage is limited to sixty (60) miles from an Authorized ServiceAgency or one of its sub-service agencies.
7. All labor shall be performed during regular working hours. Overtime premium will be charged to the buyer.
8. All genuine Wells replacement parts are warranted for ninety (90) days from date of purchase on non-warranty 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.
9. Installation, labor, and job check-outs are not considered warranty and are thus not covered by this warranty.
10. Chargesincurredbydelays,waitingtimeoroperatingrestrictionsthathindertheservicetechnician’sability to perform service are not
coveredbywarranty. This includes institutional andcorrectionalfacilities.
SHIPPING DAMAGE CLAIM PROCEDURE
NOTE: For your protection, please note that equipment in this shipment was carefully inspected and packaged by skilled personnel before
leavingthefactory. Upon acceptance of this shipment, the transportationcompanyassumes full responsibility for its safe delivery.
IF SHIPMENTARRIVES 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.
3. CONCEALED LOSS OR DAMAGE: ifdamageisunnoticeduntilthemerchandiseisunpacked,notifythe transportationcompany
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 Manufacturing cannot assume liability for damage or loss incurred in transit. We will, however, at your request, supply you with the
necessarydocumentstosupportyour claim.
xi

1
GENERALSPECIFICATIONS
DIMENSIONS APPLIANCE OVEN CAVITY
Wide 30-1/8”(765mm) 14-3/8”(365mm)
Deep 25-1/4” (641mm) oven only 21” (533mm)
26-7/8” (682mm) incl. handle
High 25-1/8” (638mm) oven only 20” (508mm)
34” (863mm) incl. prep-top\
and casters
Door Swing 20" (508mm )radius
ELECTRICAL
208 VAC 3∅ 60Hz 21Amps per leg
240 VAC 3∅ 60Hz 21Amps per leg
Note: Shipped from the factory 3 phase.
Unit is NOT approved for conversion to single phase
TABLE OF CONTENTS
Warranty ..................................................... Inside Cover
Specifications .......................................................... 1
Features & Operating Controls ............................... 2
SafetyProcedures .................................................. 4
Installation ............................................................... 5
Operation ................................................................ 8
Preventative Maintenance
Cleaning Instructions ......................................... 11
Latch Adjustment .............................................. 13
Hinge Adjustment .............................................. 15
Troubles ShootingSuggestions .............................. 17
Exploded View / Parts List ...................................... 18
WiringDiagram ....................................................... 22
Parts & Service ....................................................... 23

2
FEATURES AND OPERATING CONTROLS
FRONT REAR
RIGHT
SIDE
INSIDE
OVEN
ABCDEF G F H
KLMN
PQR
S
T
U
V
WX
Y
J

3
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
D. LATCH Holds oven door closed
E. ACCESS PANEL Covers and provides access to fan motor and electric
connections and controls
F. COOLING LOUVERS Provides air circulation for cooling. DO NOT spray or pour
water into cooling louvers
G. POWER CORD Supplies power from receptacle to oven
H. CORD HANGER Provides storage for cord when moving oven
J. OPTIONAL FRONT CASTERS Allow oven to be easily moved; locking to stabilize oven
when in position
K. OPTIONALREAR CASTERS Allow oven to be easily moved.
L. POWER FUSES Protect electrical circuits from overload
M. DATAPLATE Provides manufacturer, model and serial number information.
Also, provides electrical specifications and requirements
N. POWER PLUG Plugs into power receptacle
P. HEAT ON LIGHT Glows amber when heating elements are energized
Q. ON/OFF/FAN SWITCH Turns oven and fan, or fan only, on or off
R. POWER ON LIGHT Glows red when power is turned on
S. SOLID STATE CONTROL Controls cooking times and temperatures; programmable.
DO NOT spray or pour water into controller
T. BEEPER Audible indicator for alarms, end-of-cycle, etc.
U. RACK SUPPORTS Hold cooking racks
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

4
SAFETY PROCEDURES
Knowledge of proper procedures is essential to the safe operation of electrically energized equipment. In
accordance with generally accepted product safety labeling guidelines for potential hazards, the following
signal words and symbols are used throughout this manual.
DANGER - Danger is used to indicate the presence of a hazard which will cause
severe personal injury, death, or substantial property damage in the event the state-
ment is ignored.
WARNING - Warning is used to indicate the presence of a hazard which can cause
personal injury, possible death or major property damage in the event the statement is
ignored.
CAUTION - Caution is used to indicate the presence of a hazard which will or can
cause minor personal injury, or property damage in the event the statement is
ignored.
NOTE - Note is used to notify personnel of installation, operation or maintenance information
which is important, but not hazard related.
DANGER
PRECAUTIONS AND GENERAL INFORMATION
1. This appliance is intended for use only in commercial establishments to cook food products for
human consumption. No other use is recommended or authorized by the manufacturer or its
agents.
2. This appliance is intended for use only in commercial establishments, where all operators are
familiarwith the appliance use, limitations and associated hazards.
3. Operating instructions and warnings must be read and understood by all operators and users.
4. All servicing (other than setting temperature and timing controls) must be performed by an
authorized service agent.
5. Appliance power supply must be unplugged from electrical power when not in use for extended
periods of time. Power cord must not be draped across other appliances, nor across the gas flue of
any gas-fired equipment.
6. Unless otherwise noted, this piece of equipment is made in the USA and has American sizes on
hardware.
7. Any trouble shooting guides, component views or parts lists included in this manual are for general
reference only, and are intended for use by qualified technical personnel.
8. This manual should be considered a permanent part of this appliance. This manual and all
supplied instructions, diagrams, schematics, parts break downs, notices and labels must remain
with the appliance if it is sold or moved to another location.

5
INSTALLATION INSTRUCTIONS
A. UNPACKING AND INSPECTION
1. Carefully remove equipment from the carton. Remove all protective plastic film and
packaging materials. Remove accessories from the OVEN CAVITY before connecting
electrical power or otherwise performing any installation procedures.
NOTE: DO NOT discard the CARTON and other PACKAGING MATERIAL 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.
2. Read all instructions in this manual carefully before starting installation . READ AND
UNDERSTAND ALL LABELS AND DIAGRAMS ATTACHED TO THEAPPLIANCE.
3. Carefully account for all components and accessories before discarding packing materials.
Components and accessories are shipped in the oven cavity . Store the accessories in a
convenient place for later use:
COMPONENTS
3 ea. OVEN RACKS
1 ea. RACK SUPPORT
1 ea. FAN BAFFLE
ACCESSORIES
1 ea. LITERATURE PACKAGE
B. SERVICE TECHNICIAN INSTALLATION NOTES
1. Installation and start up should be performed by an authorized installation company.
Installermustrecord installation particulars on the CUSTOMER SERVICE DATA form
on page 23 of this manual.
2. Verify that this equipment installation is in compliance with the specifications listed in this
manual and with local code requirements.
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.

6
C. EQUIPMENT SET-UP
1. CURB or COUNTER MOUNTING
a. Setup the appliance only on a firm, level, non-combustable 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.
2. INSTALLING OPTIONAL CASTERS
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-combustable 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 spirit level, check that the appliance is level front-to-back and
side-to-side.
3. INSTALLING OPTIONAL LEGS (NOTE: Legs are not provided and must be purchased seprately.)
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-combustable 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 ONALLFOUR LEGS. With a spirit
level, check that the appliance is level front-to-back and side-to-side.
4. INSTALLING ON FABRICATED MOUNTING
a. Mounting must be capable of safely supporting 350 pounds (165 Kg.), and must be
fabricated to the following dimensions:
b. Attach the appliance securely to the mounting with four 3/4”-10 x 1” bolts.
1 (25mm) dia.
4 places
”
”
2
0-1/8
(
511mm)
” 25-15/16 (659mm)
FRONT

D. ELECTRICAL INSTALLATION
1. Refer to the nameplate on the front of the appliance. Verify the ELECTRICAL SERVICE
POWER. Voltage and phase must match the nameplate specifications, and available electrical
service amperage must meet or exceed the specifications listed on page 1.
Wiring must be no less than 4 AWG 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.
2. This appliance is equipped with a Hubble™ L430P9 plug, which must be plugged into a matching
Hubble™ L430R9 receptacle. The ground lug of the receptacle must be connected to a suitable
building ground.
4. The appliance is shipped from the factory wired for 3-phase (3ø) electrical service.
IMPORTANT: This appliance is not approved for 1ø operation. Conversion of this appliance to
single-phase operation will void the warranty.
ELECTRICAL SHOCK HAZARD
ELECTRICAL CONNECTIONS MUST BE MADE BYA
LICENSEDELECTRICIAN
Electrical shock will cause death or serious injury.
DANGER
7

OPERATION
A. SET TEMPERATURE
1. Make sure the power cord is plugged into the appropriate power
supply receptacle.
2. Place the ON/OFF/FAN switch in the ON position.
NOTE: No display will be present until the TEMPbutton is pressed.
3. Press the the TEMP button momentarily to display the current oven
temperature. The display will hold for 5 seconds.
4. Press the TEMP button and hold for 3 seconds. The current set
temperature will display and flash. The controller is now in the
programming mode.
5. Use the 3 SET buttons to set hundreds, tens and ones for the
desired oven set temperature. The corresponding digit on the digital
readout will increase from 0 to 9. Release the SET button when the
desired digit is displayed.
6. Press the TEMP button to exit the programming mode. The new set temperature will automatically be
stored in memory.
IMPORTANT: Failure to press the TEMP button within 30 seconds of programming the new oven set
temperature will cause the controller to revert to original temperature setting and delete latest changes.
7. The maximum temperature to which the controller can be programmed is 500ºF (260ºC). Any attempt
to set the oven temperature higher than 500ºF (260ºC) will cause the controller to reset the temperature
to 500ºF (260ºC).
NOTE: The actual temperature displayed may read as high as 600ºF (316ºC)
A. SET TIMER
1. Make sure the power cord is plugged into the appropriate power
supply receptacle.
2. Place the ON/OFF/FAN switch in the ON position.
3. In the IDLE mode, the digital displays will be at “low” intensity, and will
brighten while active and counting down. Verify that the time being
displayed on each of the timer digital displays is correct.
If not, proceed as follows:
4. Example: Set TIMER 1
With the timer in IDLE mode (low intensity, not counting down)
a. Press and hold TIMER button 1 and SET BUTTON for ONES.
The right digit of timer display 1 will brighten and begin to cycle
through 0 to 9. Release both buttons when the desired digit is
reached.
b. Press and hold TIMER BUTTON 1 and SET BUTTON for TENS.
The left digit of timer display 1 will brighten and begin to cycle
through 0 to 9. Release both buttons when the desired digit is
reached. When the buttons are released, the display will return
to IDLE mode and the new settings will be retained in memory.
5. TIMER buttons 2 through 6 may be set in the same manner.
8

9
C. DAILY SET-UP PROCEDURES
1. Make sure the power cord is plugged into the appropriate
power supply receptacle.
2. Recommended shelf positions for quality baked products:
NO. OF PANS RACK POSITION
OF PRODUCT UTILIZED
1 5
2 2 & 8
3 2, 5 & 8
3. Place the ON/OFF/FAN switch in the ON position. The green POWER
ON light will glow.
4. Check oven set temperature. Press and hold the TEMP button for 5
seconds or until the screen flashes the current set temperature.
If this is not right, refer to and follow the step-by-step procedure
for ”Set Temperature”, page 7.
5. If the oven set temperature is correct, press the button again to clear the
display.
6. Ensure that the door is closed. The amber HEAT light will glow, indicating that
the heaters are on.
7. Allow the oven to preheat for 30 minutes.
HINT: The product timer can be used for timing the preheat time.
8. When the amber HEAT light goes out, the oven is ready to use. From then on the amber HEAT light will
cycle on and off with the heaters (i.e. light will glow when the heaters are on).
9. Check to see that the timers are set for the correct times. If not, see “Set Timer”, page 7.
D. OVEN OPERATION
1. Make sure the power cord is plugged into the appropriate power supply receptacle.
2. Place the ON/OFF/FAN switch in the ON position.
3. Verify that the time being displayed on each of the timer digital displays is correct. If not, see “Set
Timer”, page 7.
4. To start a product cook timer, press the corresponding PRODUCT COOKING TIMER button once.
The digital display will brighten and a timing dot will appear in the lower right-hand corner of the display.
The timer will automatically begin to countdown. The timer display will show the time remaining in the
cook cycle.
5. When the timer reaches “00”, a three-tone audible alarm will sound, and the display will blink.
6. To stop the audible alarm, or to cancel a timer operation, press the corresponding PRODUCT
COOKING TIMER button once.
The display will change to IDLE mode (low intensity), the timing indicator dot will turn off, and the audible
tone will be cancelled.
USE THESE
RACK
POSITIONS

10
SUGGESTED COOKING TIMES
PRODUCT TEMP TIME NUMBER
ºF MINUTES OF RACKS
BREAD PRODUCTS
Hamburger Roll 300 15 5
Bread (1 lb loaves) 325 34 3 (12 loaves)
Roll 300 16 5 (60 rolls)
Baking Soda Biscuit 400 7 3
For best baking results, use rack positions 2, 5 & 8 ( where rack position 1 is the top rack)
Baking one pan: use rack 5; baking 2 pans: use racks 2 & 8.
PASTRIES
Sheet Cake (2½ lbs. per pan) 300 17 5
Frozen Fruit Pie (46oz.) 350 50 5 (10 pies)
Frozen Fruit Pie (26oz. - 8" dia.) 350 40 5 (15 pies)
Sugar Cookie 300 15 5
Danish Roll 350 12 5
Fruit Cake 275 75 3
Cake (1 lb.) 300 19 5 (10 cakes)
FISH
Fish Stick 350 15 5
Halibut Steak (Frozen 5 oz.) 350 20 5
FOWL
Turkey, Rolled (18 lb. roll) 310 3¾ hr 1
Chicken (2½ lb. quartered) 350 30-35 5
Chicken (Breast) 350 30 5
OTHER
Melted Cheese Sandwich 400 8 5
Idaho Potato (120 potatoes) 450 40 5
Beef Pot Pie 400 30-35 5
Macaroni & Cheese 350 30 5
Turkey Pot Pie 400 30-35 5
NOTE: The above times and temperatures are recommendations only. Your experience with your
operation and equipment will be your best guide. Record your information here:
PRODUCT TEMP TIME NUMBER
ºF MINUTES OF RACKS

11
PREVENTATIVE MAINTENANCE
CLEANING INSTRUCTIONS
CONVECTION OVEN M4200
PREPARATIONS: Allow oven to cool to 150ºF or less
FREQUENCY: Daily
TOOLS: Fiber Brush
Plastic Scouring Pad, Plastic Scraper
Mild Detergent, Conventional Oven Cleaner, Non-Abrasive Cleanser
Clean Soft Cloth / Sponge
Solution: 4 parts vinegar to 10 parts warm water
CAUTION: BURN HAZARD
Do not attempt to clean the oven until it has cooled to 150ºF or less
It can burn you. Hand protection is required.
1. Turn POWER SWITCH to FAN. With the door held open, allow the oven to cool. When
the oven interior has cooled to 150ºFor less, turn the OVEN POWER SWITCH to OFF.
2. Remove racks and rack suports. Remove fan baffle.
CAUTION: CUT HAZARD
FAN BLADES ARE SHARP. Use due care when cleaning and/or wiping.
3. Brush the fan wheel and wipe it with a moist cloth. Sponge out all loose particles.
4. Scrub entire interior of convection oven with a plastic scouring pad and non-abrasive
cleanser.
5. For baked-on food spills, sparingly use a conventional oven cleaner. Close the oven door,
place the ON/OFF/FAN switch in the OFF position. Let stand for 10 minutes.
Carefully wipe all cleaner and food residue from all interior surfaces.
Wipe the area with vinegar solution to neutralize the oven cleaner.
6. Wipe down the entire interior using a clean cloth or sponge, with hot water and a mild
detergent. Rinse by wiping with a cloth or sponge dampened with clean water.
IMPORTANT: Always wipe or rub in the direction of the polish lines or grain of the metal.
8. Clean oven racks and rack supports in a sink or dishwasher.
PM 903.1
DO NOT REMOVE FROM MANUAL- PHOTOCOPY FOR DISTRIBUTION
page 1 of 2

12
DO NOT REMOVE FROM MANUAL- PHOTOCOPY FOR DISTRIBUTION
PREVENTATIVE MAINTENANCE
CLEANING INSTRUCTIONS
CONVECTION OVEN M4200
PM 903.1
page 2 of 2
9. Reinstall the fan baffle, paying
particular attention that
the lip on the right side of the fan
baffle is fully seated in the slot in
the edge of the oven cavity.
Reinstall rack supports and racks.
10. Turn power switch to FAN . Verify
that fan runs smoothly and does
not contact fan baffle.
Turn power switch to OFF.
Reposition fan baffle if necessary.
11. Wipe down the prep top and
exterior of the oven using a
soft cloth dampened with clean
water and a mild detergent.
A nylon scouring pad may be used
to removed baked-on food debris.
Rinse by wiping with a cloth or
sponge dampened with clean water.
IMPORTANT: Always wipe or rub in the direction of the polish lines or grain of the
metal.
12. Replace oven rack supports. Install product racks in positions 2, 3 & 8. Leave the
door open overnight.
PROCEDURE IS COMPLETE
WELLS MANUFACTURING COMPANY
2 ERIK CIRCLE, P. O. Box 280
Verdi, NV 89439
Customer Service [phone] Ext.502
fax: [phone]
www.wellsbloomfield.co
m

13
BACK PLATE
STRIKER
FRONT PLATE
PREVENTATIVE MAINTENANCE
LATCH ADJUSTMENT
CONVECTION OVEN M4200
PRECAUTIONS: None
FREQUENCY: Monthly, at a Minimum; or, As Needed
TOOLS: Phillips (+) Screwdriver, 4"x2" Strip of 20# Paper
1. The door latch must be adjusted such that the door
will latch easily, yet remain closed and latched throughout
the cook cycle.
If the door is too tight when the oven is cold, it may pop
open as the oven reaches temperature.
2. Check adjustment in two places on the latch-side of the
door.
Use a piece of paper (such as a dollar bill) between the
inner surface of the door and the door gasket, just above
and just below the latch. The paper should be definitely
held, but should be able to be pulled out with just a slight
drag.
3. To adjust the vertical alignment, hold the striker assembly
while loosening the two screws. Move the striker assembly
as needed, but do not allow the parts of the striker to move
in relation to each other. Retighten the screws and re-check
the alignment.
4. To adjust the fore-and-aft alignment, the back plate acts as a tapered shim. Moving
the back plate vertically, in relation to the striker, will adjust the thickness of the striker
assembly. When properly adjusted for thickness, verify the vertical alignment and
tighten the screws.
5. Recheck the alignment. Recheck the tightness of the screw.
PROCEEDURE IS COMPLETE
TO BE PERFORMED BY QUALIFIED PERSONEL ONLY
DO NOT REMOVE FROM MANUAL- PHOTOCOPY FOR DISTRIBUTION
WELLS MANUFACTURING COMPAN
Y
2 ERIK CIRCLE, P. O. Box 280
Verdi, NV 89439
Customer Service [phone] Ext.502
fax: [phone]
www.wellsbloomfield.co
m
CHECK ALIGNMENT
LATCH
PM 903.2
page 1 of 1

14
PM 903.2

15
PREVENTATIVE MAINTENANCE
HINGE ADJUSTMENT
CONVECTION OVEN M4200
page 1 of 2
PRECAUTIONS: None
FREQUENCY: Monthly, at a Minimum; or, As Needed
TOOLS: Phillips (+) Screwdriver, 4"x2" Strip of 20# Paper
7/16" Nut Driver, 7/8" and 1-1/8" Wrenches
CAUTION: Exposed Electrical Circuits
Use care to avoid wiring for hotplate section during this procedure
1. The hinges provide the pivot for the door, allow for height adjustment and alignment so that
the door closes properly on the gasket.
2. To access the hinge adjustments:
a. Remove the prep top and oven top panel
b. Remove the bottom trim panel by removing the four screws at the ends of the panel, and
by loosening the two screws holding the bottom door gasket. The panel will then pull
straight out.
TO BE PERFORMED BY QUALIFIED PERSONEL ONLY
DO NOT REMOVE FROM MANUAL- PHOTOCOPY FOR DISTRIBUTION
PM 903.3

16
page 2 of 2
PM 903.3
PREVENTATIVE MAINTENANCE CARD
HINGE ADJUSTMENT
CONVECTION OVEN M4200
3. The door should be approximately centered between the upper and lower lips of the cabinet.
Adjust the door for height:
a. The hinge sleeve acts as a jam nut for the height adjuster.
b. The top and bottom clearances should be approximately equal. If necessary, loosen the
hinge sleeve and turn the height adjustment nut until the required clearances are
achieved.
c. Retighten the hinge sleeve.
4. Check fore-and-aft adjustment in two places on the hinge-side of the door. Use a piece of
paper (such as a dollar bill) between the inner surface of the door and the door gasket. The
paper should be definitely held, but should be able to be pulled out with just a slight drag.
5. To adjust a top or bottom hinge:
a. Loosen the holding bolts.
b. Tighten or loosen the adjusting bolt as needed to achieve the proper vertical clearance(s).
c. Retighten the holding bolts.
d. Recheck the clearances. Recheck the tightness of the bolts.
6. Reassemble the oven top, prep top and bottom trim panel. Remember to retighten the
screws for the lower gasket.
PROCEDURE IS COMPLETE
DO NOT REMOVE FROM MANUAL- PHOTOCOPY FOR DISTRIBUTION
HINGE BRACKET
HOLDING
BOLTS
DOOR PIVOT
ADJUSTING
BOLT
HINGE BRACKET
HOLDING
BOLTS
ADJUSTING
BOLT
HEIGHT
ADJUSTMENT
HINGE SLEEVE
WELLS MANUFACTURING COMPAN
Y
2 ERIK CIRCLE, P. O. Box 280
Verdi, NV 89439
Customer Service [phone] Ext.502
fax: [phone]
www.wellsbloomfield.co
m

17
TROUBLESHOOTING SUGGESTIONS
A. NO POWER TO APPLIANCE
1. Check electrical supply. Make sure service breaker is ON.
2. Possible improper service wiring: Have a licensed electrician verify that all three legs of the 3∅
service and the neutral leg are properly connected (i.e. Leg 1 to L1, Leg 2 to L2, Leg 3 to L3), and
that all three legs are of the proper voltage and phase.
B. CONVECTION OVEN WILL NOT HEAT
1. Verify that the oven switch is ON and that the temperature control is set to the desired temperature.
2. Verify that the door is closed.
3. Hi-Limit control may have tripped: Allow unit to cool; Hi-Limit will reset automatically.
4. Blown fuse(s) (item L): Correct cause of over-current and replace fuses with fuses having the same
configuration and ratings.
5. Possible internal component damage: Have unit serviced by an Authorized Wells Service Agency.
C. CONVECTION OVEN FAN WILL NOT RUN
1. Verify that the oven switch is set to ON or FAN.
2. Hi-Limit control may have tripped: Allow unit to cool; Hi-Limit will reset automatically.
3. Blown fuse(s) (item L): Correct cause of over-current and replace fuses with fuses having the same
configuration and ratings.
4. Possible internal component damage: Have unit serviced by an Authorized Wells Service Agency.
CAUTION: ELECTRICAL SHOCK HAZARD
Fuse replacement may expose dangerous voltages.
Fuse replacement must be performed by a qualified technician.
CAUTION: ELECTRICAL SHOCK HAZARD
Removal of any cabinet panel will result in exposed electrical circuits.
Any procedure requiring the removal of any cabinet panel must be performed
by a qualified technician only.
CAUTION: ELECTRICAL SHOCK HAZARD
Fuse replacement may expose dangerous voltages.
Fuse replacement must be performed by a qualified technician.

18
EXPLODED VIEW
1
10
13
15
15
16
17
19
21
21
24
29
30
30
35
35
36
38
14
39
39
40
6
42
44
80
55
60
54
68
68 53
52
50
51
22
56
59
57
58
47
32
A
B
C
C
20
101
102
103 g
g
mn s
k
k
mns
g
j
j
q
r
p
t
g
g
ag
g
q
g
p
4 pl.
p
hcc
q
q
q
q
q
4 pl.
2
pl.
2
pl.
4pl.
z
a
69 g
pv
g
M4200
Cabinet & Related Components
ref.
90
92
ref.
ref.
cc