IMPORTANT: WELLS BLOOMFIELD PROPRIETARY INFORMATION.
DISSEMINATION OF THIS INFORMATION TO ANYONE OTHER THAN
WELLS AUTHORIZED SERVICE AGENTS IS STRICTLY PROHIBITED.
TECHNICAL CONTENT OF THIS MANUAL IS DESIGNED FOR
USE BY QUALIFIED PROFESSIONAL TECHNICIANS ONLY.
PRINTED IN UNITED STATES OF AMERICA
WELLS BLOOMFIELD, LLC
2 ERIK CIRCLE, P. O. Box 280 Verdi, NV 89439
www.wellsbloomfield.com
telephone: 775-689-5703
fax: 775-689-5976
p/n 507573 Rev. (-) ECN-13404 S211 080124 cps
SUPPLEMENTAL
SERVICE
INSTRUCTIONS
for
WAFFLE BAKERS
with
ELECTRONIC
TEMPERATURE
CONTROL
Model
WB-1
WB-2
212
11
22
00
11
22
00
W
E
L
L
S
WELLS
WELLS
This manual is considered to be Wells Bloomfield, LLC proprietary
information. Dissemination of this information to anyone other than
Wells Bloomfield authorized service agents is strictly prohibited.
Technical content of this manual, including any wiring diagrams,
schematics, parts breakdown illustrations and/or adjustment
procedures, is intended for use by qualified professional technicians
only.
This appliance is intended for use in commercial establishments
only.
This appliance is intended
to prepare food for human consumption.
No other use is
recommended or authorized by the 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.
DO NOT submerge this appliance in water. Do not splash or pour
water on, in or over any controls, control panel or wiring.
Never use a wire brush or metal scraper on aluminum components.
Use bristle or fiber brush to clean grids.
Any procedure which requires the use of tools must be performed by a
qualified technician.
This appliance is made in the USA. Unless otherwise noted, this
appliance has American sizes on all hardware. Any conversion to
metric measurements are approximate and may vary.
Information in this manual reflects current production models as of
January 1, 2008. Specifications, model numbers, product numbers
and data subject to change without notice.
WARNING:
RISK OF
PERSONAL 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.
WARNING:
ELECTRIC
SHOCK HAZARD
All servicing requiring
access to non-insulated
electrical components must
be performed by a qualified
technician.
Only qualified technicians are
authorized to 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.
PRECAUTIONS AND GENERAL INFORMATION
xi
212 507573 SvcManual for WB-1, -2 Waffle Bakers
Precautions & General Information …………………………… xi
Electrical Specifications ..……………………………………….. 1
Features & Operating Controls …………………………………. 2
Operational Checks …..…………………………………...……. 3
Servicing Instructions
Troubleshooting Guide ...................................................... 5
Top Grid Assembly ............................................................ 6
Bottom Grid Assembly ....................................................... 7
Exploded Views …….....................…………………………….. 8
Wiring Diagrams ..................................................................... 10
This manual contains information needed to properly service and repair Wells Waffle Bakers.
This manual applies to the following Wells Bloomfield models manufactured after Jan. 1, 2008:
WB-1
WB-2
For installation, operation and maintenance instructions, refer to Operation Manual p/n 37055.
For specifications, general arrangement and dimensions, refer to General Layout Data p/n 37093.
For units built prior to Jan 1, 2008, refer to Supplemental Service Instructions p/n 502973.
General Dimensions:
TABLE OF CONTENTS
INTRODUCTION
1
SPECIFICATIONS
WB-1 WB-2
10-1/8” Wide x 16” Deep x 8-3/4” High
Appliance is 18-3/4” High with grid open.
19-13/16” Wide x 16” Deep x 8-3/4” High
Appliance is 18-3/4” High with grid open.
MODEL STYLE
VOLTAGE
1ø
WATTS AMPS
POWER SUPPLY
CORD
WB-1
Single
Waffle Baker
120 VAC 900 W 7.5 A NEMA 5-15P
208 VAC 676 W 3.25 A NEMA 6-15P
240 VAC 900 W 3.75 A NEMA 6-15P
WB-2
120 VAC 1800 W 15 A NEMA 5-20P
208 VAC 1352 W 6.5 A NEMA 6-15P
240 VAC 1800 W 7.5 A NEMA 6-15P
Double
Waffle Baker
212 507573 SvcManual for WB-1, -2 Waffle Bakers
FEATURES & OPERATING CONTROLS
2
ITEM COMMENTS
TEMPERATURE ADJUSTMENT Dial adjustment of temperature control
LOWER GRID ASSEMBLY Lower cooking element; contains temperature sensor
UPPER GRID ASSEMBLY Upper cooking element
GRID HANDLE Used to safely raise / lower grid
DRIP TRAY Catches excess waffle batter; removable for easier cleaning
POWER SWITCH Energize / de-energize waffle baker
HINGE ASSEMBLY Supports upper grid; allows grid to be raised/lowered for baking
DATA PLATE Lists manufacturer information, agency approvals and electrical specifications
TIMER Mechanical “bell” timer; rings to indicated end of cook cycle
RUBBER FEET Provide means of leveling waffle baker; provide non-slip support
POWER CORD 115VAC NEMA 5-15P or 5-20P / 208-240VAC NEMA 6-15P
BACK VIEW
UPPER GRID
(RAISED POSITION)
POWER
SWITCH
UPPER GRID
(LOWERED
POSITION)
HANDLE
DRIP TRAY
TIMER
LOWER GRID
ADJUSTABLE NON-SLIP FEET
TEMPERATURE
CONTROL
POWER
CORD
NAME
PLATE
212 507573 SvcManual for WB-1, -2 Waffle Bakers
OPERATIONAL CHECKS
3
A. AMPERAGE CHECKS
1. Waffle Baker sections are tested separately. Use WB-1 amperage
rating when testing an individual Waffle Baker section.
2. Total amperage may be checked with an inductive amperage tester
(Amprobe™ or similar) by encircling a single wire at the power
switch.
3. Make all testing hookups with the Waffle Baker unplugged and
when the cooking surfaces are cold
.
B. TEMPERATURE CHECKS
1. Desired baking temperature is 390ºF ±5ºF (200ºC ±3ºC).
2. Turn the power switch ON and allow Waffle Baker to heat for a
minimum of 30 minutes. Insert a pyrometer of known accuracy
between the closed grids and allow the readings to stabilize.
3. Temperature may be adjusted turning the controller dial adjustment
(item 6).
C. VOLTAGE AND RESISTANCE TEST POINTS
D. VOLTAGE AND RESISTANCE CHECKS
1. Voltage between TP 1 and TP 2 (upper grid) will be
120V when unit is energized and controller is calling
for heat.
2. Voltage between TP 3 and TP 4 (lower grid) will be
120V when unit is energized and controller is calling
for heat.
3. IMPORTANT:
Always unplug appliance from electric power and
momentarily ground all three prongs of the power
cord before attempting resistance checks.
Resistance between TP 5 and TP 6 (with red and
white sensor leads disconnected from temperature
controller)
At room temperature ............... 100,000 ohms
At baking temperature .................. 600 ohms
CAUTION:
ELECTRIC SHOCK
HAZARD
Live electric circuits may
be exposed during these
procedures. Take necessary
precautions to avoid electric
shock.
CAUTION:
BURN HAZARD
HOT SURFACES
Equipment surfaces may be
hot during these procedures.
Take necessary precautions
to avoid burns.
AMPERAGE
WB-1 WB-2
120 7.5 15.0
208 3.3 6.5
240 3.8 7.5
VOLTAGE
212 507573 SvcManual for WB-1, -2 Waffle Bakers
TOP GRID ASSEMBLY
BOTTOM GRID ASSEMBLY
TP 1
TP 3
TP 4
TP 2
TP 5
TP 6
TEMP
SENSOR
GROUND
CONNECTION
100Ω
1KΩ
10KΩ
100KΩ
1MΩ
0
25
50
75
100
125
150
175
200
(ºC)
(ºF)
32
77
122
167
212
257
302
347
392
THERMAL RESPONSE CURVE
SENSOR P/N 507279
TYP. ROOM TEMP
77ºF (25ºC) 100,000≈ Ω
NORMAL BAKING TEMP
392ºF (200ºC) 600≈ Ω
OPERATIONAL CHECKS (continued)
4
E. EVALUATING THE RESULTS
1. Presence of 120V in Test #1 or Test #2 (calling for heat but
element not heating) indicates a damaged heating element.
2. Absence of 120V in Test #1 or Test #2 when calling for heat
indicates:
a.) power switch
OFF or damaged; or,
b.) temperature control is set too low; or,
c.) damaged temperature controller; or,
d.) a wiring or connector problem
3. Open or shorted temperature sensor in Test #3 indicates:
a.) damaged temperature sensor
b.) a wiring or connector problem
F. TROUBLESHOOTING SUGGESTIONS
1. In 208/240V units, the elements are wired in series: in 120V units,
the elements are wired in parallel.
Amperage readings 1/2 of normal indicate a 208/240V unit
operating on 120V, or possible electrical problems in either the top
or bottom grid assembly. Wiring investigation, as well as voltage
and resistance measurements, may be required to isolate the
exact problem.
2. Amperage readings significantly above normal indicate either a unit
operating on the wrong voltage, a partial short, or a deteriorated
heating element. Again, voltage and resistance measurements will
be required to pinpoint the problem.
3. Failure of an individual grid assembly to heat indicates electrical
or component problems in that area. Voltage measurements will
be required to isolate the exact problem.
4. Grids which heat, but do not come up to temperature, indicate a
possible temperature adjustment problem, a damaged element or
a problem with the controller or sensor. Also note that heavily
carboned grids will exhibit this symptom.
5. Grids which overheat uncontrollably indicate either a temperature
sensor that is not firmly attached to the lower grid, a damaged
temperature controller or (rarely) an electrical short.
CAUTION:
ELECTRIC SHOCK
HAZARD
Live electric circuits may
be exposed during these
procedures. Take necessary
precautions to avoid electric
shock.
CAUTION:
BURN HAZARD
HOT SURFACES
Equipment surfaces may be hot
during these procedures. Take
necessary precautions to
avoid burns.
212 507573 SvcManual for WB-1, -2 Waffle Bakers
SERVICING INSTRUCTIONS
5
212 507573 SvcManual for WB-1, -2 Waffle Bakers
SYMPTOM POSSIBLE CAUSE SUGGESTED REMEDY
Unit does not heat Power switch OFF Press switch to ON
Unit not plugged in or circuit not
energized
Check/reset circuit breaker
Be sure unit is plugged into an
energized outlet
Temperature controller not set Adjust controller for desired
temperature
Damaged power cord, power
switch or internal wiring
Use wiring diagram and voltage
checks to diagnose
One side does not heat Power switch OFF Press switch to ON
Temperature controller for that
side not set
Adjust controller for desired
temperature
Damaged power switch or
internal wiring
Use wiring diagram and voltage
checks to diagnose
Damaged controller Replace controller
Damaged temp sensor or sensor
disconnected from controller
Check sensor (should be 10K to
100K ohms)
Verify connections
One element does not heat Damaged heating element Replace heating element
One side gets too hot Temperature controller not set Adjust controller for desired
temperature
Temp sensor not firmly attached
to lower grid
Be sure sensor is securely
attached to mounting boss
One side does not get hot
enough
Temperature controller not set Adjust controller for desired
temperature
Grids need to be de-carbonized Refer to Operation Manual for
de-carbonization instructions
Grid smokes excessively Grid not properly prepared prior
to baking
Brush grids with clean vegetable
oil or apply an appropriate
commercial cooking spray
Operated at too high a
temperature
Adjust controller for desired
temperature
Interior of grid contaminated with
batter
Clean components. Be sure grid
gasket is properly in place and
that grid is properly assembled
Timer does not shut off heating
elements
Proper operation. Timer is a
signalling device only
Refer to Operation Manual for
proper use of the timer
A. TROUBLESHOOTING GUIDE
SERVICING INSTRUCTIONS (continued)
6
212 507573 SvcManual for WB-1, -2 Waffle Bakers
CAUTION:
ELECTRIC SHOCK
HAZARD
Unplug appliance from
electric power before
removing any panel or
access cover.
SERVICE INSTRUCTION - COMPONENT REPLACEMENT
WAFFLE BAKER TOP GRID ASSEMBLY
3
4
5
1
2
3032730327
CONDUIT, CAST
P/N 50329
Insert small diameter end
into hinge
SOLID CONDUIT
P/N 55552 (90º for WB-1)
P/N 55547 (45º for WB-2)
PLUG,
P/N 50328
HINGE PIVOT
HINGE
P/N 50322
SCREW 8-32
P/N 51715 (pk 100)
Ground wire gets 4“ of
FIBERGLASS SLEEVE
P/N 54573 (rl 100ft)
after it is pulled into casting
Ground wire
Power wires
CASTING, TOP
P/N 50327
GRID, UPPER P/N 58919
Be sure pattern of grids is
properly aligned.
GASKET, GRID P/N 50337
Check to insure gasket is
installed flush around casting
9
CLAMP PLATE, TOP
P/N 50431
INSULATION PAD,
WB ELEMENT TOP
P/N 50430
Between clamp plate
and element
ELEMENT, HEATING
120V 450W P/N 507277
Assemble so that terminals
are at the 9:00 position
(when grid detail faces away,
and handle is at 6:00).
SCREW, 8-32 x 5/16“
P/N 51715 (pk 100)
Do not tighten until all
screws are in place.
Ensure that
element terminals are
centered in opening of
clamping plate before
tightening screws.
Trap ground wire under
this screw.
NOTES:
The drawings shows the right side top baking
assembly for a WB-2.
The left side assembly is similar, with the hinge
pivot components reversed.
The top baking assembly for a WB-1 is identical
to this drawing, with the exception of the conduit,
which is 90º, rather than the 45º conduit shown.
Power wires get 9“ of
RUBBERIZED SLEEVE
P/N 50284 (rl 10 ft) after
they are pulled into casting
7
6
10
8
HANDLE (ref.)
8-32 KEPS NUT 51053 (pk 100)
PLUG, TOP CASTING P/N 58628
Insert stud on clamping plate of Grid &
Element Assembly into hole of Casting &
Hinge Assembly. Ensure that grid gasket is
evenly seated. Secure assemblies with nut
and insert plug.
14
Pull power wires
through hinge to
this point
Pull ground wire
through hinge to
this point
12
13
11
B. TOP GRID ASSEMBLY
SERVICING INSTRUCTIONS (continued)
C. BOTTOM GRID ASSEMBLY
CAUTION:
ELECTRIC SHOCK
HAZARD
Unplug appliance from
electric power before
removing any panel or
access cover.
7
10
Rotate grid assembly to
ensure wires and mounting
studs align with bottom
casting
11
Route wires through LARGE
hole in bottom of casting.
Be sure wires cannot chafe
or rub on sharp edges of
cabinet or bottom casting
12
Check to ensure gasket is installed
flush around casting
13
CASTING, BOTTOM P/N 50326
Apply a small amount of grease
to top of casting, then assemble
grid to casting
14
GASKET, BOTTOM GRID P/N 50338
Route wires through FRONT holes in
gasket and cabinet.
15
NUT, ACR 8-32 P/N 58627 (pk 10)
Insert mounting studs into holes in
upper ledge of casting. Assemble
using cap nuts
PROBE, TEMP SENSOR
P/N 507279
CASTING, GRID BOTTOM
P/N 58920
Check for chips or
other blemishes
1
GASKET, GRID
P/N 50337
Check to insure
gasket is installed
flush around casting
2
ELEMENT, 120V 450W
P/N 507277
Apply graphite to
mounting holes
PLATE, CLAMPING
P/N 50445
Verify mounting
studs pointing away
from grid
5
4
SCREW, 8-32 x 5/16“ P/N 51715 (pk 100) Do not tighten
until all screws are in place. Ensure that element
terminals are centered in opening before tightening.
Base and temperature
control bracket mount
to cabinet at these
threaded holes
(4 per base)
Grid studs pass
thru these holes
in base to mount
NOTE: Grid assembly
shown inverted
BASE CASTING
(shown for reference)
SERVICE INSTRUCTION - COMPONENT REPLACEMENT
WAFFLE BAKER BOTTOM GRID ASSEMBLY
3
7
6
212 507573 SvcManual for WB-1, -2 Waffle Bakers
EXPLODED VIEW
8
212 507573 SvcManual for WB-1, -2 Waffle Bakers
SWITCH, LIGHTED
55127
MOUNTING, HINGE
60332
PIN, HINGE
50333
PLUG, HINGE PIVOT
50328
HINGE, 50322
E-CLIP 50222
(pk 10)
FITTING, CONDUIT
50329
CONDUIT 55547
MOUNTING, CONDUIT
52101
ASSY, TIMER & KNOB
50446
BELL TIMER (ONLY)
51549
KNOB (ONLY) 50447
DRIP TRAY
21489
ASSY, HOLE PLUG
61064
ASSY, SHELL WB-2
51551
ASSY, SHELL WB-1
53653
STRAIN RELIEF
51217
GASKET, BOTTOM
50338
CONTROLLER,
TEMPERATURE
507278
PANEL, BOTTOM
WB-2
51856
FOOT, RUBBER
65724
(pk 4)
CABINET WB-2
CABINET WB-1
GASKET, BOTTOM
50338
ASSY, TIMER & KNOB
50446
BELL TIMER (ONLY)
51549
KNOB (ONLY)
50447
DRIP TRAY
21489
SWITCH, LIGHTED
55127
STRAIN RELIEF
51217
FOOT, RUBBER
65724
(pk 4)
CONTROLLER,
TEMPERATURE
507278
ASSY, HOLE PLUG
61064
MOUNTING, HINGE
60332
PIN, HINGE
50333
PLUG, HINGE PIVOT
50328
HINGE, 50322
E-CLIP 50222
(pk 10)
FITTING, CONDUIT
50329
CONDUIT 55552
BUSHING, CONDUIT
REAR PANEL,
WB-1
507478
REAR PANEL,
WB-2
507479
BRACKET,
CONTROL MOUNT
507482
BRACKET,
CONTROL MOUNT
507482
EXPLODED VIEW (continued)
9
212 507573 SvcManual for WB-1, -2 Waffle Bakers
UPPER GRID
LOWER GRID
PLUG, HINGE
50328
CLAMPING PLATE
UPPER 50431
INSULATION, TOP
ELEMENT
50430
GASKET, GRID
50337
GASKET, GRID
50337
ELEMENT, HEATING
120V 450W
(INCL. INSULATORS)
507277
ELEMENT, HEATING
120V 450W
(INCL. INSULATORS)
507277
GRID, UPPER
58919
GRID, BOTTOM
58920
HANDLE, WIRE
50335
CASTING, UPPER
50327
HOLE PLUG 5/8 DIA
58628
HINGE 50322
FITTING, CONDUIT
50329
SLEEVING, RUBBER
50284 (pk 10 ft. rl.)
SLEEVING, GLASS
54573 (pk 250 ft. rl.)
CLAMPING PLATE
LOWER 50445
CASTING, LOWER
50326
GASKET, BOTTOM
50338
NUT, 8-32 ACORN
58627 (pk 10)
PROBE, TEMPERATURE
507279
ASSY, UPPER GRID
120V 58881
240/208 58880
ASSY, LOWER GRID
120V 61743
240/208 61742
10
WIRING DIAGRAMS
212 507573 SvcManual for WB-1, -2 Waffle Bakers
230
230
110
110
COMM
COMM
SENSOR
SENSOR
OUTPUT
OUTPUT
BLACK
BLACK
WHITE
WHITE
RED
RED
WHITE
WHITE
UPPER
HEATING
ELEMENT
120V 450W
UPPER
HEATING
ELEMENT
120V 450W
LOWER
HEATING
ELEMENT
120V 450W
LOWER
HEATING
ELEMENT
120V 450W
LIGHTED
POWER
SWITCH
LIGHTED
POWER
SWITCH
POWER
CORD
POWER
CORD
TEMPERATURE
CONTROL
BOARD
TEMPERATURE
CONTROL
BOARD
TEMPERATURE
SENSOR
TEMPERATURE
SENSOR
1
1
2
2
6
6
7
7
5
5
3
3
4
4
10
10
VOLTS
VOLTS
NOM. AMPS
NOM. AMPS
120
208
240
220
7.5
3.3
3.8
3.6
MODEL WB-1 SINGLE WAFFLE BAKER 120V SINGLE PHASE
MODEL WB-1 SINGLE WAFFLE BAKER 208-240V SINGLE PHASE
WIRE
COUPLER
307434 ISSUE (-)
307434 ISSUE (-)
WAFFLE BAKER WB-1
WAFFLE BAKER WB-1
11
WIRING DIAGRAMS (continued)
212 507573 SvcManual for WB-1, -2 Waffle Bakers
230 230
230 230
110 110
110 110
COMM COMM
COMM COMM
SENSOR SENSOR
SENSOR SENSOR
OUTPUT OUTPUT
OUTPUT OUTPUT
BLACK
BLACK
WHITE
WHITE
RED RED
RED RED
WHITE WHITE
WHITE WHITE
UPPER
HEATING
ELEMENT
120V 450W
UPPER
HEATING
ELEMENT
120V 450W
LEFT UPPER
HEATING ELEMENT
120V 450W
RIGHT UPPER
HEATING ELEMENT
120V 450W
LOWER
HEATING
ELEMENT
120V 450W
LOWER
HEATING
ELEMENT
120V 450W
LEFT LOWER
HEATING ELEMENT
120V 450W
RIGHT LOWER
HEATING ELEMENT
120V 450W
LIGHTED
POWER
SWITCH
LIGHTED
POWER
SWITCH
LIGHTED
POWER
SWITCH
LIGHTED
POWER
SWITCH
POWER
CORD
POWER
CORD
TEMPERATURE
CONTROL
BOARD
TEMPERATURE
CONTROL
BOARD
TEMPERATURE
CONTROL
BOARD
TEMPERATURE
CONTROL
BOARD
TEMPERATURE
SENSOR
TEMPERATURE
SENSOR
TEMPERATURE
SENSOR
TEMPERATURE
SENSOR
11
1
1
22
22
66
66
77
77
55
55
33
33
44
44
10 10
10 10
VOLTS NOM. AMPS
208
240
220
6.5
7.5
7.2
MODEL WB-2 DUAL WAFFLE BAKER 120V SINGLE PHASE
MODEL WB-2 DUAL WAFFLE BAKER 208-240V SINGLE PHASE
WIRE
COUPLER
WIRE
COUPLER
VOLTS
120
NOM. AMPS
15.0
9
9
8
8
307434 ISSUE (-)
307434 ISSUE (-)
WAFFLE BAKER WB-2
WAFFLE BAKER WB-2
/
