Wells MOD-400TAF Installation Manual

WELLS BLOOMFIELD, LLC

10 Sunnen Drive P.O.Box 430195

St. Louis, MO 63143 USA

telephone: [phone]

fax: [phone]

www.wellsbloomfield.com

MODULAR AUTO-FILL

MOD-400TDM/AF
MOD-427TDM/AF

011C

OWNERS MANUAL

BUILT-IN

FOUR-WELL

WARMERS

MODELS

Includes

INSTALLATION

USE & CARE

EXPLODED VIEW

PARTS LIST

MOD-427TDM/AF

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 USING OR

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

questions concerning installation, operation or maintenance of this equipment.

WIRING DIAGRAM

PRINTED IN UNITED STATES OF AMERICA

p/n 2M-308025 Rev. (-) M011C.14 100420

LIMITED WARRANTY STATEMENT

Unless otherwise specified, all commercial cooking
equipment manufactured by WELLS BLOOMFIELD, LLC 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,
whichever comes first, and is for the benefit of the original
purchaser only.
THIS WARRANTY IS THE COMPLETE AND ONLY
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 BLOOMFIELD PRODUCTS.
This warranty is void if it is determined that, upon inspection
by an authorized service agency, the equipment has 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
if service is performed by unauthorized personnel. The
prices charged by Wells Bloomfield 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 Bloomfield factory
authorized service agency or one of its sub-service
agencies. 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 service. In addition to restrictions
contained in this warranty, specific limitations are shown in
the Service Policy and Procedure Guide. Wells Bloomfield
authorized service agencies are located in principal cities.
This warranty is valid in the United States and Canada and
void elsewhere. Please consult your classified telephone
directory, your foodservice equipment dealer or contact:

10 Sunnen Dr., P.O.Box 430129 St. Louis MO 63143 USA

phone [phone] or fax [phone]

for information and other details concerning warranty.

Wells Bloomfield, LLC

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

cleaning schedules, are customer responsibility.
Thos 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.

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.

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.

xi

TABLE OF CONTENTS

WARRANTY xi
FEATURES & OPERATING CONTROLS 2
PRECAUTIONS & GENERAL INFORMATION 3
AGENCY LISTING INFORMATION 3
INSTALLATION 4
OPERATION 6
MAINTENANCE INSTRUCTIONS 7
CLEANING INSTRUCTIONS 8
TROUBLESHOOTING SUGGESTIONS 10
WIRING DIAGRAM 11
EXPLODED VIEW & PARTS LIST 12
PARTS & SERVICE 16
CUSTOMER SERVICE DATA 17

INTRODUCTION

Thank You for purchasing this Wells Bloomfield 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 which will ensure its optimum performance.

SPECIFICATIONS

MODEL VOLTS WATTS

L1 L2 L3 N

208 VAC 4960W 14.5A 14.5A 9.8A 0.0A 23.8A

MOD-400TDM/AF

240 VAC 6600W 17.8A 17.8A 11.3A 0.0A 27.5A
208 VAC 4960W 14.5A 14.5A 9.8A 0.0A 23.8A

MOD-427TDM/AF

240 VAC 6600W 17.8A 17.8A 11.3A 0.0A 27.5A

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

1

AMPS 3ø

AMPS1ø

FEATURES & OPERATING CONTROLS

A. THERMOSTAT

1. On THERMOSTATICALLY CONTROLLED warmers, power is
applied to the heating element according to the control knob
position and the actual temperature at the temperature sensing
thermobulb.

2. The desired temperature is controlled by rotating the
TEMPERATURE CONTROL KNOB. The knob has a numeric
scale, where higher numbers correspond to higher temperature.

3. On warmers equipped with an INDICATOR LIGHT, the light will
glow when the thermostat is calling for heat (i.e. the element is
energized).

4. The TEMPERATURE CONTROL KNOB will rotate
approximately 300º, and will reach a “stop” at both ends.
The OFF position is marked.

NOTE: The dial position is an indication of the temperature
setting. Actual temperature will vary depending upon the type of
product and food consistency.

B. MOUNTING

1. Top-mounted built-in warmers may be equipped with
WELLSLOKS, uniquely designed turnout tabs which help
secure the warmer top flange to the countertop.

2. Bottom-mounted warmers require that the cutout be flanged to
provide a mounting means.

3. See the Installation Instructions, supplied with the particular
appliance, for details.

C. DRAINS

1. AUTOFILL units (e.g. MOD-400TDM/AF) have their individual
drain fittings manifolded together, with a single drain valve for
the entire manifold.

D. AUTOFILL

1. On AUTOFILL units, water level is automatically fed into the
"master" pan whenever that pan's thermostat is ON .

2. Water level is sensed by a WATER LEVEL PROBE in the
"master" pan.

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

2

PRECAUTIONS AND GENERAL INFORMATION

This appliance is intended for use in commercial establishments
only.

This appliance is intended
consumption. No other use is
manufacturer or its 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.

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.

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. 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.

to hold pre-heated food for human

recommended or authorized by the

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

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

DAMAGE

CAUTION:

HOT SURFACE

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

Refer to the product nameplate for the specific appliance for agency
listings. In general:

This appliance conforms to NSF Standard 4 for sanitation only if
installed in accordance with the supplied Installation Instructions.

UL Listed warmers are

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

U Listed under UL File E6070.

3

AGENCY LISTING INFORMATION

STD 4

E6070

UL Listed Warmers

INSTALLATION

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.

CAUTION

FIRE HAZARD

Avoid storing flammable or
combustible materials in, on
or near the appliance.

IMPORTANT: For warmers
installed in plastic counter
tops, the counter material
must be protected from the
heat of the warmer in order to
prevent discoloration and/or
deterioration. Wellsloks are
not suitable for this purpose.
The installer should contact
the manufacturer or distributor
of the countertop material for
specific instructions.

IMPORTANT: Wellslok
Extension Kits must be used
ONLY with UL Listed
warmers approved for
installation in wood counter
tops. Refer to the Installation
Instructions provided with the
warmer.

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 and the Installation
Instruction Sheet packed with the appliance 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.

INSTALLATION NOTES

1. Installation and start up of built-in warmers MUST be performed
by an authorized installation company.

2. It is the RESPONSIBILITY OF THE INSTALLER to verify that
this warmer installation is in compliance with the specifications
listed in this manual and on the specification sheet provided.

3. It is the RESPONSIBILITY OF THE INSTALLER to check with
the AUTHORITY HAVING JURISDICTION, in order to verify
that this warmer installation is in compliance with local code
requirements.

4. Water supply and drain installation must meet all appli cable
local, state and federal plumbing codes and ordinances.

5. Refer to Installation Instructions included with the warmer for
Underwriters Laboratories conditions of acceptability, electrical
requirements and other installation concerns.

BUILT-IN WARMERS

1. This is a GENERAL GUIDE. For specific cutout dimensions
and other installation details, refer to the Installation
Instructions supplied with the warmer.

2. Cutout dimensions for warmer units and control panels are
listed on the Installation Instructions provided with the warmer.

NOTE: Cutout dimensions are different for auto-fill and non-auto-fill
control panels, for single and split control panels and for wood and
metal counters. Verify the dimensions are correct for the
installation before making the cutout.

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

4

3. For “top-mounted” warmers (i.e. warmers mounted from above
the counter top):
a. Verify that provided sealants are applied to the underside
of the warmer top flange prior to setting the unit into the
cutout.
b. After installation, verify that the tabs on the Wellsloks are
turned out to lock the warmer into the counter
c. Apply a thin bead of food-grade silicone sealant around the
flange to seal it to the counter.
d. Wellslok extension kits are available for installing warmers
in counter tops where the standard Wellslok would not
normally reach. The extension kit will adapt to counter
tops up to 1¾” thick.

ELECTRICAL INSTALLATION

1. Refer to the product nameplate. Verify the electrical service
power. Voltage and phase must match the nameplate
specifications. Wiring the warmer to the wrong voltage can
severely damage the unit or cause noticeably decreased
performance.

2. Available electrical service amperage must meet or exceed the
specifications listed on the specification sheet provided with the
warmer.

3. Warmer and control unit must be connected to an appropriate
building ground. Ground connection will be marked “GND” or
” " .

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.

E. PLUMBING INSTALLATION

For use in the State of Massachusetts, this appliance must be
installed in compliance with Massachusetts Fuel Gas and

Plumbing Code CMR 248.

1. IMPORTANT: All plumbing installations must be performed by
a qualified plumber.

2. AUTOFILL units are equipped with a DRAIN LINE: Some
jurisdictions may require an approved air gap or other
back-flow prevention device in the drain. It is the responsibility
of the plumber to determine such requirement, to provide and
properly install the required device.

3. For AUTOFILL units: Some jurisdictions may require an
approved back-flow preventer in the water supply line. It is the
responsibility of the plumber to determine such requirement,
and to provide and properly install the required device.
Autofill supply must be connected to a COLD WATER line only.

INSTALLATION

NOTE: Damage caused by

leaks due to improper
installation is NOT covered by
warranty.

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: Electrical
installation other than as
specified on the specification
sheet will void the UL listing,
and may void the warranty.

NOTE: Plumb connections
must be made in compliance
with all Federal, State and
Local Plumbing Codes and
Ordinances.

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

5

OPERATION

CAUTION:

HOT SURFACE

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

CAUTION:

SHOCK HAZARD

DO NOT splash or pour water
onto control panel or wiring.

Always use an inset.
DO NOT place food directly
into the warmer.

Always pour hot water into the
warmer before it is
preheated. DO NOT pour
water into a dry, heated
warmer. This may damage
the unit.

DO NOT put ice into a
warmer pan. This will cause
condensation on the inside of
the warmer. Damage caused
by condensation is NOT
covered by warranty.

Stir thick food items frequently
to keep food heated uniformly.
Keep insets covered to
maintain food quality and
temperature.

DO NOT use autofill
warmers in the dry mode.
This may damage the water
level sensor. NEVER turn the
thermostat ON for the pan
with the sensor and fill tube
unless the entire warmer unit
is to be used in the wet mode.

AUTOFILL WARMERS

1. Autofill warmers sense water level by a sensor placed at the
proper level. For manifolded autofill warmers, the water level
sensor / fill tube is in one pan only, normally in the far left pan.

2. Water fills the pan through an inlet tube. For manifolded
autofill warmers, the fill tube is normally in the far left pan. All
other sections fill at the same time through the drain manifold.

3. The autofill function is active only when the thermostat for the
pan with the water level sensor is turned ON .

4. Make sure the drain valve is fully closed before turning any
thermostats ON.

5. The autofill function is only activated when the far left
thermostat is turned ON. For manifolded autofill warmers, be
sure to turn far left thermostats ON before turning any other
control ON, to avoid heating a dry pan.

6. DO NOT use autofill warmers in the dry mode. This may
damage the water level sensor probe. NEVER turn the
thermostat ON for the pan with the probe and fill tube unless
the entire warmer unit is to be used in the wet mode.

7. Clean water level sensor daily to maintain water level in
warmer.

WARMERS WITH MANIFOLDED DRAIN

1. Manifolded warmers have a single drain valve.

2. Water poured into any one section will seek the same water
level with all sections on the manifold.

3. Make sure the drain valve is fully closed before filling warmer.

PRE-HEATING THE WARMER

1. Place desired pan(s) or inset(s) with appropriate adapter top on
warmer.
a. Insets are available as accessories in 2½ qt., 4qt., 7 qt.,
and 11 qt. sizes with lids and adapter tops.
b. For dry operation, a 6” deep pan or inset is recommended.

2. Turn temperature control to HI or highest temperature setting.

3. Allow warmer to preheat for approximately 30 minutes, then set
the control for the desired temperature. Be sure to keep the
warmer covered during preheat and operation.

OPERATION

1. Always use an inset. DO NOT place food directly into the
warmer.

2. Check water level in wet-operation warmer frequently during
use. Running warmers dry will lower the temperature of the
food in the insert pan, and may damage the warmer.

3. Alternating between wet and dry operation in any individual
warmer is NOT recommended.

4. DO NOT use metal tools, steel wool, or caustic or abrasive
cleanser to clean warmer pan.

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

6

MAINTENANCE INSTRUCTIONS

CARE OF STAINLESS STEEL

Stainless steel is a marvelous material: strong, lustrous and low maintenance. With a
minimum of care, it will normally retain its beauty and durability for the life of the
equipment. In some applications, however, special care is required in order to maintain
stainless steel’s special properties.

External components, such as cabinets and control panels, are finished with a grain
pattern. This pleasing finish is best maintained by cleaning with a non-abrasive
cleanser applied with a soft cloth. Rub only in the direction of the grain. In the absence
of visible grain, rub only along the longest axis of the appliance.

Restore stainless steel’s luster by applying a polish specifically made for stainless steel.
Spray on, wipe off with a soft cloth, rubbing in the direction of the grain.

Never use metal implements, wire brushes, abrasive scratch pads or steel
wool to clean stainless steel.

Warmer pans, insets and other vessels are subject to a harsher environment. Wells
Manufacturing uses an very high quality stainless steel (#304DDQ) for our food warmer
pans. Even the highest quality stainless steel, however, is mostly iron, and will rust, pit
and corrode under the following conditions:

• Poor Water Quality: Hard water (water with a high content of dissolved minerals)

will leave mineral deposits when allowed to dry. Calcium (lime) can buildup on
heated surfaces, even under water. If left unattended, hard water spots and lime
buildup can lead to rusting, corrosion and pitting.

• Contact with Chlorides: Chlorides (specific compounds of chlorine) are found in

food, table salt and many cleansers. Chlorides can attack the surface of stainless
steel, resulting in corrosion and pitting.

Keep your stainless steel warmers clean and free from calcium buildup.
Use alkaline, alkaline chlorinated or non-chloride cleanser.
Use citric acid-based cleaners to remove calcium deposits.

For additional information, please read the NAFEM Stainless Steel Equipment and
Cleaning Guide. Contact NAFEM at :
North American Association of Food Equipment Manufacturers
401 N. Michigan Avenue
Chicago, Illinois 60611-4267
[phone]

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

7

CLEANING INSTRUCTIONS

CAUTION:

SHOCK HAZARD

Do NOT splash or pour water
into or over any control panel
or wiring.

CAUTION:

SHOCK HAZARD

Disconnect warmer from
electric power before cleaning

CAUTION:

BURN HAZARD

Allow warmer to cool
completely before cleaning.

DAILY CLEANING INSTRUCTIONS
PREPARATIONS: Turn control knob(s) to OFF. Allow warmer to cool

before proceeding.
Remove any insets, pans and/or adapter tops.
Drain or remove water from well if used for
wet operation.

FREQUENCY: Minimum - daily.
TOOLS: Mild Detergent

Solution: 10 Parts Warm Water to 4 Parts Vinegar
Plastic Scouring Pad
Clean Cloth or Sponge
Food-Grade Silicone Sealant

1. Wipe entire unit down using a clean cloth or sponge and mild
detergent. Carefully wipe any debris and residue from the water
level sensor (auto-fill units).

2. Use a plastic scouring pad to remove any hardened food particles
or mineral deposits. IMPORTANT: Do NOT use steel wool for
cleaning.

3. Rinse warmer thoroughly with a vinegar and water solution to
neutralize all detergent cleanser residue.

4. Inspect warmer flange-to-counter seal. Reseal with food-grade
silicone sealant if necessary. Failure to do so may allow grease and
water to leak into insulation and heating element, causing a potential
fire and/or electric shock hazard.

5. Inspect warmer tank for damage. Damage to the outer body may
allow grease and water to leak into insulation and heating element,
causing a potential fire and/or electric shock hazard. Contact your
Authorized Wells Service Agency to inspect warmer if water or
grease contamination is suspected.

6. Close drain valve. Add proper amount of warm water. Turn control
knob(s) ON and check for proper operation.

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

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CLEANING INSTRUCTIONS

WEEKLY CLEANING INSTRUCTIONS
PREPARATIONS: Remove any insets, pans and/or adapter tops.

Drain or remove water from well if used for wet
operation.

FREQUENCY: Weekly, or whenever lime or scale is seen
accumulating on the sides of the warmer pans.

TOOLS: Commercial Delime Cleaner
Plastic Scouring Pad
Clean Cloth or Sponge

1. Add water to pans until water is at normal operating level
(1” - 1 1/2” deep) or covers accumulated scale.

2. Heat water to maximum temperature (190ºF or higher).

3. Pour contents of one package of commercial delime cleaner
into each warmer pan. Stir to dissolve cleaner. Turn heat
control OFF. Cover pans.

4. Allow solution to soak at least one hour, or overnight for heavy
scale buildup.

5. Drain hot water from pans. Scrub with a plastic scouring pad.
Rinse thoroughly with hot water, then dry.

6. Refill pans with hot tap water and resume operation.

7. Heavy scale buildup may require additional treatments.

CAUTION:

CHEMICAL BURN

Deilimng chemicals may be
caustic. Wear appropriate
personal protective equipment.
Follow cleaner manufacturer's
instructions for safest use.

HAZARD

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

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TROUBLESHOOTING SUGGESTIONS

SYMPTOM POSSIBLE CAUSE SUGGESTED REMEDY

No power to warmer Circuit breaker off or tripped Reset circuit breaker

Warmer will not heat Temperature control not set

Wet insulation

Warmer trips circuit breaker

Pan leaking or other internal
damage

Internal damage
Mineral deposits on pan acting

as a insulator

Warmer slow to heat

Wired to wrong voltage

Drain valve not fully closed

Drain-equipped unit will not hold
water

Drain valve damaged or pan(s)
leaking

Water level sensor dirty Clean water level sensor

Auto-fill unit overflows

Internal damage

Set control to desired
temperature

Verify flange-to counter seal is
sound, or reseal with food-grade
silicone sealant

Contact your Authorized Wells
Service Agency for repairs

Contact your Authorized Wells
Service Agency for repairs

Clean pan(s) with delime cleaner
Verify supply voltage - must

match voltage on warmer
nameplate

Check drain valve for debris and
close fully

Contact your Authorized Wells
Service Agency for repairs

Contact your Authorized Wells
Service Agency for repairs

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

Be sure water supply is turned
on and water supply hose is not
pinched or twisted

Contact your Authorized Wells
Service Agency for repairs

Auto-fill unit does not fill

One or more pans of an auto-fill
unit do not fill

Water supply turned off or
restricted

Bad Probe or other Internal
Damage

Blocked drain manifold Clean drain manifold

There are no user-serviceable components in this appliance.
In all instances of damage or malfunction, contact your Authorized Wells Service Agency for repairs.

10

WIRING DIAGRAM FOR MOD400TDM & 427TDM WARMER W/AUTO WATER FILL

208/240V, SINGLE & THREE PHASE

HEATING ELEMENT (4)

WIRING DIAGRAM

PROBE

MALE/FEMALE
CONNECTOR

WATER FILL VALVE

27

L1

L3

L2

SINGLE PHASE

38

15

29

WATER PAN

50

36

28

32

12

13

10

30

51

19

35

GRN

37

LOW WATER CONTROL

19

4
3
2
1

PROBE

4

THERMOSTAT

34

COM

22

L1

L3

L2

SINGLE PHASE

56

28

6

29

30

PILOT LIGHT

89

7

WIRE
CONNECTOR

22

33

28

9

22

6

7

29

4

35

33

9

7

4

35

VOLTS

208
240

THREE PHASE

14.5

17.8

30

14.5

17.8

L1

L2

L3L2L1

9.8

11.3

10

11

THERMOSTAT

SINGLE

PHASE

23.8

27.5

12

50

60

14

13

15

27

28

13

32

29

12

10

34

HZ

L1

L3L3

L2

TERM. BLOCK

30

COMMON

INPUT

37

MAX

NO

ALTERNATE LOW
WATER CONTROL

35

19

38

36

48111 (J)

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

11

EXPLODED VIEW & PARTS LIST

MOD-400TDM A/F (SPLIT CONTROL BOX)

5P-21709

WS-55742

2K-48198

WS-503893

2V-35609

WS-503713

2K-48197

2V-47650

2K-47662

2C-46591

ELEMENT PAN
KIT WS-503842

THERMOBULB

(ref.)

D8-303352

ELEMENT ONLY
2N-303375UL, (208/240V)

ELEMENT & PAN ASSY
WS-503843 (208/240V)

made from 2H-36196

(150' roll)

2K-34136X

2I-Z12311

2T-45917

2I-40034

2E-306865

make from

2H-36050

(150' roll)

2E-46529

2C-46591

P2-4 6587

2K-31040

2R-40498

2I-Z12311

2K-34136X

WS-50131

WS-61974

2J-35687

P2-Z12289

2T-45917

P2-40843

P2-Z12288

LO

2

3

E7-49046

0

OFF

WELLS

WELLS

4

5

HI

6

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

P2-35004

P2-35004

2K-31040

WS-50131

2C-41974

2J-35687

2R-40498

8

7

IL2013, Rev. -

12

MOD-400TDM A/F (SINGLE CONTROL BOX)

5P-21709

WS-55742

ELEMENT PAN KIT

2K-48198

WS-503893

2V-35609

WS-503713

2K-48197

2V-47650

2K-47662

2C-46591

WS-503842

THERMOBULB

(ref.)

D8-303352

EXPLODED VIEW & PARTS LIST

ELEMENT ONLY
2N-303375UL (208/240V)

ELEMENT & PAN ASSY
WS-503843 (208/240V)

make from 2H-36196

(150' roll)

2K-34136X

2I-Z12311

2I-40034

2E-306865

make from

(150' roll)

2T-45917

2E-46529

56050

2K-31040

WS-50131

2C-41974

2J-35687

2R-40498

P2-Z12584

2

LO

3

WELLS

WELLS

4

P2-35004

P2-35004

0

OFF

HI

8

7

6

5

2C-46591

P2-46587

IL2014

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

13

EXPLODED VIEW & PARTS LIST

WELLS

MOD-427TDM A/F (SPLIT CONTROL BOX)

21709

ELEMENT ONLY
503375 (208/240V)

504101

55609

54136

50177

503713

make from

(150' roll)

65917

60034

56050

67662

66591

68198

68197

67650

51040

61974

55687

500700

50131

ELEMENT

PAN KIT

503842

THERMOBULB

(ref.)

503352

53859

ELEMENT & PAN
ASSEMBLY
503843 (208/240V)

51040

50131

61974

make from 56196

(150' roll)

500712

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

500712

503141

66529

66591

66587

60498

50177

54136

14

65917

60843

54015

LO

2

3

55687

0

OFF

4

60498

HI

8

7

6

5

MOD-427TDM A/F (SINGLE CONTROL BOX)

WELLS

21709

EXPLODED VIEW & PARTS LIST

ELEMENT ONLY
503375 (208/240V)

504101

55609

50177

503713

make from

56050

(150' roll)

65917

67662

66591

68198

68197

67650

500700

ELEMENT

THERMOBULB

50131

PAN KIT

503842

51040

(ref.)

503352

ELEMENT & PAN
ASSEMBLY
503843 (208/240V)

make from 56196

500712

(150' roll)

500712

54136

60034

503141

66529

61974

55687

60498

0

OFF

HI

LO

2

3

8

7

6

4

5

66591

66587

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

15

PARTS & SERVICE

Always use an inset.
DO NOT place food directly

into the warmer pan.

DESCRIPTION PART NO.
ADAPTERS & INSETS

ADAPTER TOP, convert 12” x 20” warmer to
hold two 7 qt. insets 21502

ADAPTER TOP, convert 12” x 20” warmer to
hold two 4 qt. and two 2½ qt 21503

ADAPTER TOP, convert 12” x 20” warmer to
hold three 4 qt. insets 21616

ADAPTER TOP, convert 12” x 20” warmer to
hold one 7qt. and one 4 qt. 21618

ADAPTER TOP, convert 12” x 20” warmer to
hold four 2½ qt. insets 21623

ADAPTER TOP, convert 12” x 27” SMPT-27
to hold three 7 qt. insets 21503

2½ QT. ROUND INSET w/ lid 20773
4 QT. ROUND INSET w/ lid 20774
7 QT. ROUND INSET w/ lid 20587
11 QT. ROUND INSET w/ lid 20908
11 QT. ROUND INSET w/ hinged lid 21057

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

16

PARTS & SERVICE

DESCRIPTION PART NO.
ACCESSORIES

6 oz. SOUP LADLE 21764
WELLSLOK EXTENSION KIT, for UL LISTED

circular warmers only, adapt to wood counter
up to 1¾” thick 22592*

WELLSLOK EXTENSION KIT, for UL LISTED
12” x 20” warmers only, adapt to wood counter
up to 1¾” thick 22593*

* Wellslok Extension Kits for UL Listed units approved for
installation in wood counter tops
One well units require one kit / Two and three well units require
two kits / four and five well units require three kits

DRAIN VALVE EXTENSION KIT, extension from
drain to counter front with remote handle, for use
with “D” models only, excluding “DM” models 20385

DRAIN SCREEN 21709
OPTIONAL 72” WIRING, thermostatically controlled

warmers **
** contact factory customer service for availability

IMPORTANT: Use only
factory authorized service
parts and replacement
filters.

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

Wells Bloomfield, LLC

10 Sunnen Dr., P.O.Box 430129
St. Louis MO 63143 USA

Service Dept.

phone: [phone]
fax: [phone]

Service Parts Department can
supply you with the name and
telephone number of the
WELLS AUTHORIZED
SERVICE AGENCY
nearest you.

CUSTOMER SERVICE DATA

RESTAURANT _____________________________ LOCATION _____________
INSTALLATION DATE ________________________ TECHNICIAN ___________
SERVICE COMPANY ________________________________________________
ADDRESS ___________________________ STATE ______ ZIP__________
TELEPHONE NUMBER (_____)_____-_________

EQUIPMENT MODEL NO. _______________
EQUIPMENT SERIAL NO. _______________

VOLTAGE: (check one) 120 208 240

M011C.14 2M-308025 Owners Manual for Built-In Four-Well Auto-Fill Modular Warmers

please have this information available if calling for service

17

Genuine Parts

Protect - YOU - All - Ways

SERVICE TRAINING - QUALITY SERVICE

CUSTOMER SATISFACTION

Commercial Food Equipment Service Association

Wells Bloomfield proudly supports CFESA

Commercial Food Equipment Service Association

SERVICE TRAINING - QUALITY SERVICE

CUSTOMER SATISFACTION

WELLS BLOOMFIELD, LLC

10 Sunnen Drive P.O.Box 430195

St. Louis, MO 63143 USA

telephone: [phone]

fax: [phone]

www.wellsbloomfield.com

PRINTED IN UNITED STATES OF AMERICA