Wells WVG-136 SERIES Operating instructions

IMPORTANT: WELLS BLOOMFIELD, LLC 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 PROFESSIONALTECHNICIANS ONLY.
PRINTED IN UNITED STATES OF AMERICA
WELLS BLOOMFIELD, LLC
2 ERIK CIRCLE, P. O. Box 280 Verdi, NV 89439
telephone: [phone]
fax: [phone]
www.wellsbloomfield.com
p/n SV502 Rev.(-) S502 080516 cps
502
SUPPLEMENTAL
SERVICE
INSTRUCTIONS
WVG-136
WVG-136RW
and
WVG-136RWT
ELECTRIC
GRIDDLE
with
VENTLESS
HOOD
SYSTEM

GENERAL
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 splash or pour water on, in or over any controls, control
panel or wiring.
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. All service to the fire suppression system must be
performed by an authorized Ansul® agency.
This appliance is made in the USA. Unless otherwise noted, this
appliance has American sizes on all hardware.
IMPORTANT INSTALLATION NOTE:
6” clearance is required from back and sides of the appliance to any
combustible or non-combustible surface.
This installation requires a minimum ceiling height of 96" in order to
maintain adequate airflow.
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.
WARNING:
ELECTRIC
SHOCK HAZARD
All servicing requiring access
to non-insulated electrical
components must be
performed by a qualified
technician.
Some procedures involve
exposed live circuits. Use all
due caution to avoid contact
with live electric circuits.
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
SV502 SvcManual WVG-136(RW)

GENERAL
GENERAL
Precautions & General Information …………….………… xi
Specifications ..……………………………...................….. 1
Features & Operating Controls ……………………………. 2
VENTILATOR HOOD SECTION
Operational Notes ........................................................... 8
Filter System ................................................................... 10
Vacuum System .............................................................. 11
Ansul® System ............................................................... 12
Troubleshooting Suggestions ……………………………… 14
GRIDDLE SECTION
Operational Notes .............................................................. 16
Element Clamping Diagram .............................................. 19
Troubleshooting Suggestions ........................................... 19
DRAWER WARMER SECTION
Operational Notes .............................................................. 20
RWT-Style Controller ........................................................ 21
Troubleshooting Suggestions ........................................... 22
EXPLODED VIEWS AND PARTS LISTS
Ansul® Components ......................................................... 23
Hood Section .................................................................... 24
Griddle Section ................................................................ 26
Drawer Warmer Section ................................................... 28
WIRING SCHEMATICS & DIAGRAMS ................................. 30
OTHER DOCUMENTS
Material Safety Data Sheet—Ansulex Low pH ................. 36
Maintenance Logs ............................................................ 38
This manual contains information needed to properly service and repair Wells Bloomfield free-standing
electric griddle with ventless hood system.
This manual applies to the following Wells Manufacturing models:
WVG-136
WVG-136RW
WVG-136RWT
For installation, operation and maintenance instructions, refer to Operation Manual p/n 304986.
TABLE OF CONTENTS
INTRODUCTION
1
SPECIFICATIONS
MODEL DRAWER
WARMER VOLTS 60Hz 3ø AMPS 1ø AMPS WATTS DIMENSIONS
L1 L2 L3
WVG-136 NO 208V 17 29 17 35 7300
30-3/8" Wide
(42-3/8" incl. spacers)
77-1/4" High
35-1/2" Deep
240V 20 33 20 40 9500
WVG-136RW
WVG-136RWT 208V 20 28 20 38 7900
240V 24 33 24 43 10400
YES
SV502 SvcManual WVG-136(RW)

GENERAL
SV502 SvcManual WVG-136(RW)
FEATURES & OPERATING CONTROLS
Fig. 1 Ventilator Section Operating Features & Controls
2
28 28
19
16
23
a15
a11
53
56
18
9
838
VENTILATOR CONTROL PANEL
see pages 4 & 5
GRIDDLE CONTROL PANEL
see pages 4 & 5
18 16
23
WARMER CONTROLS
see pages 4 & 5
PULL
HANDLE
TO ACTI V ATE
FIRE SUPPRESSION
SYSTEM
INC ASEOF
FIRE
ANSUL ®
22
a10
12 41
4243
40
a6
a31
38
44
28
1

GENERAL
SV502 SvcManual WVG-136(RW)
ITEM
1.
a6.
8.
9.
a10.
a11.
12.
a15.
16.
18.
19.
22.
23.
28.
a31.
38.
40.
41.
42.
43.
44.
53.
56.
DESCRIPTION
NAMEPLATE
FIRE SUPPRESSION
AGENT TANK (1.5 gal.)
ADJUSTABLE (FRONT) LEG
RIGID (REAR) CASTER
MANUAL PULL STATION
FUSIBLE LINKS
LOWER REAR ACCESS
PANEL
DISCHARGE NOZZLE
GREASE BAFFLE
PRE-FILTER ASSEMBLY
HEPA/CHARCOAL FILTER
PACK
GREASE CUP
GREASE TROUGH
VENTILATOR EXHAUST
DUCT
STATUS INDICATOR
POWER CORD
WARMER RELAY
POWER CONTACTOR
BUILDING FIRE ALARM
RELAY
GROUND LUG
INTERLOCK TERMINAL
FILTER INTERLOCK
SWITCHES
VENTILATOR FAN
COMMENT
Lists Manufacturer, Model and Serial Number information.
Also lists electrical specifications.
Container for Ansulex™ Low-pH liquid fire suppression liquid.
Allows the unit to be leveled.
Allows the unit to be easily positioned by lifting the front of the unit
slightly.
Provides a means of manual activation of the fire suppression system.
PULL ONLY IN CASE OF FIRE!
Automatically activates fire suppression system in the event of fire on
the griddle.
Allows access to Ansul® fire suppression agent tank (a6) and controls
also access to main power contactor (41).
Fire suppression media discharges here (2 places).
Extracts and drains most grease and moisture from the air flow.
Comprises the PRE-FILTER FRAME and a replaceable
PRE-FILTER. Stops larger particles of grease from reaching the
FILTER PACK for reduced maintenance costs.
Stops most grease and smoke particles. Also assists in some cooking
odor removal.
Collects grease/moisture drained from grease trough (23).
Directs grease/moisture removed by grease baffle to grease cup.
Exit point for ventilator airflow - on top left rear of unit.
DO NOT BLOCK
Displays status of fire suppression system (COCKED - FIRED) If
FIRED, a buzzer will sound continuously.
6’ cord and cap. Plug for NEMA 15-60R (receptacle by user).
Provides power to roll warmer section. Energized at all times except
during fire safety shut-down.
Energizes griddle only while ventilator section is sensed as
operational.
Reports fire alarm condition to building fire management system.
Ground wire of power cord connects here.
Provides connection for shut-down control by building fire
management system.
Proper installation of grease baffle and filter pack close these switches
in ventilator sensor circuit.
Provides air movement for ventilation.
FEATURES & OPERATING CONTROLS (continued)
VENTILATOR SECTION
3

GENERAL
FEATURES & OPERATING CONTROLS (continued)
Fig. 2 Ventilator Section Controls & Indicator Lights
Fig. 3 Griddle & Warmer Drawer Operating Features & Controls
4
SV502 SvcManual WVG-136(RW)
V.01 V.02 V.03 V.04 V.05 V.06
GRIDDLE
GREASE
TROUGH
GRIDDL
E
SURFACE
GREASE
DRAWER
OPTIONAL ROLLWARMER
HUMITROL
RACK
DRAWER
INSERT
PAN
W.04 W.01
W.05
W.03
W.02
W.06
G.02 G.01
RWT-STYLE
RW-STYLE

GENERAL
ITEM
V.01
V.02
V.03
V.04*
V.05*
V.06*
G.01
G.02
W.01
W.02
W.03
W.04
W.05
W.06
DESCRIPTION
POWER SWITCH
POWER ON INDICATOR
CHECK FILTERS ALARM
INDICATOR
REPLACE PREFILTER
ALARM INDICATOR
REPLACE FILTER PACK
ALARM INDICATOR
SERVICE REQUIRED
ALARM INDICATOR
GRIDDLE TEMPERATURE
CONTROL
INDICATOR LIGHT
WARMER TEMPERATURE
CONTROL
POWER ON INDICATOR
THERMOMETER
(OPTIONAL )
HUMIDITY CONTROL
CONTROL MODULE
WARMER POWER
SWITCH
COMMENT
Energizes blower motor. If, after 10 seconds, proper conditions
are met, appliance is energized.
GREEN. Glows when POWER switch is ON.
AMBER. Glows if one or more filters are out of position. Check
all filters and baffles for proper installation.
AMBER. Glows when PREFILTER is approaching the end of its
service life and must soon be replaced.
AMBER. Glows when FILTER PACK is approaching the end of
its service life and must soon be replaced.
RED. Glows when PREFILTER and/or FILTER PACK has
reached the end of its service life and is too loaded to allow
sufficient air flow. Filter MUST be replaced. Appliance is SHUT
DOWN until expended filters are replaced.
Thermostat control of temperature of one griddle half.
AMBER. Glows when heating element is energized.
Infinite switch control of one warmer drawer.
AMBER. Glows when associated control is turned ON.
Shows temperature in warmer drawer. Must be ordered at time
of initial equipment build.
Slide control of shutters to control air circulation within the
warmer drawer.
Adjust setpoint, view setpoint and actual temperatures.
Energize individual drawer warmer.
FEATURES & OPERATING CONTROLS (continued)
GRIDDLE SECTION CONTROLS
OPTIONAL WARMER SECTION CONTROLS
* See PRECAUTIONS & GENERAL INFORMATION, pages 6 - 8 for special procedures regarding
prefilters and filter packs.
VENTILATOR SECTION CONTROLS
5
SV502 SvcManual WVG-136(RW)
RW-STYLE
RWT-STYLE

VENTILATOR HOOD
HOOD SECTION - OPERATIONAL NOTES
6
SV502 SvcManual WVG-136(RW)
FILTER
RAIL
FILTER
HOOK
FILTER PACK
PRE-FILTER
ASSEMBLY
GREASE
BAFFLE
GREASE
TROUGH
AIR FLOW
HOLDER CLIP
FILTER PACK
POSITION
SWITCH
GREASE BAFFLE
POSITION
SWITCH
FILTER PACK
SEAL
PRE-FILTER
NOTE: AIR FLOW ARROW
POINTS AWAY FROM
INSTALLER WHEN
PROPERLY INSTALLED
FILTER
FRAME
NOTE: PRE-FILTER IS SENSED
AS BEING IN POSITION BY THE
PRESSURE DROP ACROSS IT.
FILTER HOOK
FILTER
HANDLE
FILTER PACK
HOLDERCLIP
CLIPS ONTO
LEDGE
WALL OF UNIT
PRE-FILTER
FAN

VENTILATOR HOOD
HOOD SECTION - OPERATIONAL NOTES (continued)
SV502 SvcManual WVG-136(RW)
7
POWER SWITCH
Energizes the ventilator section. When all three
filters are sensed as being in their proper position,
and sufficient airflow is proven, the cooking
appliance contactor is energized.
INDICATOR LIGHT
(GREEN) VENTILATOR
POWER ON
When lit, indicates that electrical power is available,
and that the power switch (V.01) is turned ON.
INDICATOR LIGHT (AMBER) CHECK
FILTERS (POSITION)
When lit, indicates that the BAFFLE, PRE-FILTER
and/or FILTER PACK is not in its proper position,
or that an interlock switch is out of adjustment.
Controlled by: Plunger switches position monitors
for Filter Pack and Grease Baffle; and, vacuum
switch S3 for Pre-Filter.
INDICATOR LIGHT (AMBER) REPLACE
PREFILTER
When lit, indicates that the pre-filter is approaching
the end of its service life.
ALWAYS HAVE A SPARE PRE-FILTER ON
HAND FOR QUICK REPLACEMENT.
Controlled by vacuum switch S1.
INDICATOR LIGHT (AMBER) REPLACE
FILTER PACK
When lit, indicates that the filter pack is approaching
the end of its service life.
REPLACE FILTER PACK PROMPTLY!
Controlled by vacuum switch S2.
INDICATOR LIGHT (RED) SERVICE
REQUIRED
Indicates that either the pre-filter or the filter pack is
individually clogged (the individual indicator light
may be lit), or that the the airflow drop across both
filters is critical. As a cost saving measure, always
change a dirty pre-filter first (when lights V.04 &
V.05 are not lit, and red light V.06 is on).
Note: Power to the cooking appliance will be
de-energized whenever this RED “SERVICE
REQUIRED” indicator light is lit. When lit, the air
flow is insufficient to meet appliance vapor capture
levels requirements.
Controlled by vacuum switch S4.

VENTILATOR HOOD
REPLACE PREFILTER and REPLACE FILTER PACK indicator lights
provide a timely warning that a system shut-down is imminent. The
actual time between the indicator light coming on and the loss of
cooking appliance power will depend upon the cooking conditions.
Anytime a dirty PRE-FILTER is replaced, the system airflow will
increase. If the condition of the FILTER PACK is marginal, the
REPLACE FILTER PACK light could then come on. If this happens, a
fresh FILTER PACK must be installed within a reasonably short time.
Loss of airflow through the old filter pack will soon cause a system
shut-down when the airflow falls below minimum vapor capture levels.
KEEP SPARE FILTER PACKS ON HAND.
IMPORTANT: If you decide to “get the most” out of the old filter pack,
and continue to use it until a system shut-down happens, it is advisable
to have a fresh filter pack readily at hand, and have someone available
who is capable of replacing it. Otherwise, you may experience an
extended down time, with consequent associated loss of business.
The manufacturer assumes no liability for loss of business due to
a system shutdown caused by a dirty pre-filter and/or filter pack
(i.e. red SERVICE REQUIRED light is on), when the user fails to
have the proper replacement pre-filter and/or filter pack on hand.
WARNING:
FIRE AND HEALTH
HAZARDS
DO NOT bypass or attempt to
bypass the filter placement
interlocks. Operating the
appliance without filters properly
in place will compromise the fire
protection and air filtration
capabilities of this unit.
Serious personal injury and/or
substantial property damage may
result.
NOTICE:
Operating without all filters
properly in place, and/or
operating with filter placement
interlocks defeated will void the
manufacturer’s warranty.
IMPORTANT:
NEVER wash the PREFILTER or
FILTER PACK.This will shut
down the cooking appliance.
(Red “SERVICE REQUIRED”
light will turn ON).
HOOD SECTION - OPERATIONAL NOTES (continued)
8
SV502 SvcManual WVG-136(RW)

VENTILATOR HOOD
HOOD SECTION - OPERATIONAL NOTES (continued)
9
SV502 SvcManual WVG-136(RW)
FIRE DAMPER INSTRUCTIONS
1. The FIRE DAMPER is accessible by removing the TOP PANEL
The FIRE DAMPER sets in the DAMPER SUPPORT and may be
removed by lifting straight up.
2. The FIRE DAMPER normally needs no maintenance. If it
becomes heavily contaminated with dust and/or grease, it must
be replaced.
3. If the FIRE DAMPER malfunctions or if the fusible link releases,
the manufacturer recommends that the entire FIRE DAMPER
ASSEMBLY be replaced.
4. Reinstall the FIRE DAMPER with the “THIS SIDE UP FOR
HORIZONTAL MOUNTING” arrow pointing away from the
BLOWER.
IMPORTANT:
Replace the entire fire damper
assembly if the link trips, or if the
damper mechanism becomes
heavily contaminated with dust
and/or grease.
While the fusible link alone may be
replaced, once the damper has
tripped it may no longer function
reliably.
Contact factory for pricing and
availability.
LABEL
SHUTTER
FUSIBLE LINK
280ºF
ACCESS DOOR
THIS SIDE
THIS SIDE UP
FOR HORIZONTAL
MOUNTING
¬ ®
AIR FLOW
THIS
SIDE UP
FOR VERTICAL
MOUNTING
FIRE
DAMPER
DAMPER
SUPPORT

VENTILATOR HOOD
HOOD SECTION - FILTER SYSTEM
10
SV502 SvcManual WVG-136(RW)
NOTE:
Change the pre-filter as
soon as the "REPLACE
PRE-FILTER" indicator
glows in order to extend the
service life of the filter pack.
NOTE:
The charcoal portion of the
filter pack is an aid in
controlling cooking odors
only. It will not completely
eliminate such odors.
1. The GREASE BAFFLE separates grease particles and water vapor
from the air stream by the centrifugal force of the air moving through
its inter-leaved baffle plates. Ejecta is collected in the GREASE CUP
through drain holes in the baffle frame and cabinet.
The GREASE BAFFLE POSITION MONITOR plunger switch controls
electric power to the ventilator fan.
2. The PRE-FILTER is composed of a replaceable media filter and a
filter-retaining gage. The pre-filter captures the bulk of grease vapors.
Pre-filter position is monitored by a vacuum switch, which is in the
control circuit of the cooking appliance contactor.
3. The FILTER PACK is composed of a high-efficiency filter to capture
grease vapors down to a very small particle size; and, an activated
charcoal filter to help control cooking odors.
The FILTER PACK POSITION MONITOR plunger switch is in the
control circuit of the cooking appliance contactor.
FILTER PACK
POSITION MONITOR
GREASE BAFFLE
POSITION MONITOR
HOOD ASSEMBLY
(LOOKING UP)
NOTE AIR FLOW ARROWS ON
GREASE BAFFLE, PRE-FILTER
AND FILTER PACK. INSTALL
THESE COMPONENTS SUCH
THAT ARROWS POINT
TOWARD FAN
FILTER
PACK
PRE-FILTER
ASSEMBLY
GREASE
BAFFLE

VENTILATOR HOOD
HOOD SECTION - VACUUM SYSTEM
11
SV502 SvcManual WVG-136(RW)
SWITCH FUNCTION
VS1 PRE-FILTER POSITION MONITOR
Unit will not function unless a pre-filter
is properly installed, as sensed by the
pressure drop across it. Pressure drop
across the pre-filter must exceed setting
before cooking appliance is energized.
Insufficient pressure drop will illuminate
"CHECK FILTER" indicator.
VS2 FILTER PACK ALERT
Will illuminate "REPLACE FILTER PACK"
indicator if pressure drop across the filter
pack exceeds setting.
VS3 PRE-FILTER ALERT
Will illuminate "REPLACE PRE-FILTER"
indicator if pressure drop across the pre-
filter exceeds setting.
VS4 AIR FLOW MONITOR
Pressure drop must exceed setting before
cooking appliance is energized. As filters
become plugged, airflow decreases.
Beyond the useful life of the filters, air flow
will be insufficient to maintain the required
pressure drop, which will shut-down
ventilator fan and cooking appliance and
illuminate "SERVICE REQUIRED"
indicator.
IMPORTANT:
Vacuum switch settings are factory set, and are not
adjustable.
PLENUM PORT
(AFTER FILTER PACK)
CABINET PORT
(BEFORE FILTER PACK)
FAN
PORT A
PORT B
PORT B
PORT C
PORT C
PORT C
PORT A
VS1
VS2
VS4
VS3
FAN
GREASE
BAFFLE
PRE-
FILTER
FILTER
PACK FAN
AMBIENT
PRESSURE
PRESSURE
DROP ACROSS
BAFFLE
PRESSURE
DROP ACROSS
PRE-FILTER
PRESSURE
DROP ACROSS
FILTER PACK
PRESSURE
RISE FROM
FAN
AIR FLOW
SWITCH
VS1
SWITCH
VS2
SWITCH
VS4
SWITCH
VS3

VENTILATOR HOOD
HOOD SECTION - ANSUL® FIRE DETECTION SYSTEM
12
SV502 SvcManual WVG-136(RW)
IMPORTANT:
All servicing of the fire
detection system to be
performed by an
authorized Ansul® agent
only.
1. Cooking appliance protected by two series detectors with 212ºF
fusible links.
2. Fire suppression system may be activated by the manual pull station
on the front of the unit, or by a remote manual pull station if installed.
3. A microswitch in the Ansul® Automan assembly allows connection to
a building fire alarm system.
A
N
S
UL
PULL
HANDLE
INCASEOF
FIRE
THREADED
THRUHOLE
BLIND
HOLE
CABLE SITS IN
GROOVE IN
PULLEY
HOOD ASSEMBLY
VIEWED FROM REAR
FUSE LINK
212ºF
FUSE LINK
212ºF
SER IES
DETECTOR
MANUAL
PU LL STATION
PULLEY
ELBOW
MICROSWITCH

VENTILATOR HOOD
HOOD SECTION - ANSUL® FIRE SUPPRESSION SYSTEM
13
SV502 SvcManual WVG-136(RW)
IMPORTANT:
All servicing of the fire
suppression system to be
performed by an
authorized Ansul® agent
only.
1. Actuation of the Ansul® system will cause the pressure cartridge seal
to be punctured, which will pressurize the 1.5 gallon media tank. Fire
suppression media will be forced through the piping where it will spray
from the various nozzles.
2. The cooking appliance surface is protected by two type 290 nozzles.
3. The plenum area between the filters and the fan is protected by a
single type 1W nozzle.
4. The pressure integrity of the plenum bulkheads is maintained by the
use of compression fittings at the piping penetrations.
5. Nozzles are protected from grease contamination by press-on silicone
rubber caps.
HOODASSEMBLY
VIEWED FROM REAR PLENUM
NOZZLE ASSY
APPLY SEALANTTAPE
APPLY SEALANTTAPE
UNDER-HOOD
MANIFOLD
FLEX
HOSE
INSIDE
OUTSIDE
CABINET WALL SEAL WITH
TEFLON TAPE
SEAL WITH
TEFLON TAPE
FIBER
WASHER
IS ALWAYS
ONTHE INSIDE
TYPICAL BULKHEAD
FITTING
PRESSURE
CARTRIDGE
FIRE SUPPRESSION
MEDIA TANK
NOZZLE 1W
NOZZLE 290

VENTILATOR HOOD
14
SV502 SvcManual WVG-136(RW)
SYMPTOM POSSIBLE CAUSE SUGGESTED REMEDY
Entire unit inoperative
No lights glow
No buzzer sounds
Unit unplugged. Plug power cord into receptacle
Circuit breaker off or tripped Reset circuit breaker
Damaged power cord Replace power cord
Damaged power switch Check switch. Replace as req’d.
External interlock jumper loose or
damaged (unit is not connected to
building fire control system)
Check jumper. Repair or replace
as required
External interlock open (unit
connected to building fire control
system)
Locate and rectify open circuit
condition in building fire control
system.
Cooking appliance inoperative
“POWER” light on hood ON. Vent
fan working ok with no service
Contactor, wiring or connectors
damaged Replace contactor Repair wiring
Cooking appliance inoperative
“POWER” light on hood ON.
Vent fan working OK.
"SERVICE REQUIRED" light ON
Vacuum line to switch VS4
restricted Check for restriction in vacuum line to switch.
Vacuum switch VS4 open or
defective Check vacuum switch VS4. Replace as req’d.
Vacuum pickup port in plenum, or
vacuum port on blower plugged
Clean vacuum ports
NOTE: Vacuum port in plenum
may appear as a place to attach
a nozzle. Do not attach a nozzle
here. It will block the vacuum
signal (see pg 11).
Fire damper tripped
Replace fire damper
NOTE: While the fusible link alone
may be replaced, once the
damper has tripped it may no
longer function reliably.
Grease baffle and/or filter pack
position switch(es) open
Missing or un-seated filter assy.
Reseat filter or adjust interlock
switch.
Vacuum switch VS1 open or
damaged
Be sure pre-filter is hooked in
position. Check for damaged
vacuum line, or one that is
disconnected at the vacuum
switch or pick-up port. Also check
port for grease contamination.
Vent fan working OK, but amber
“CHECK FILTERS” light stays ON
HOOD SECTION - TROUBLESHOOTING SUGGESTIONS

VENTILATOR HOOD
15
SV502 SvcManual WVG-136(RW)
HOOD SECTION - TROUBLESHOOTING SUGGESTIONS (continued)
SYMPTOM POSSIBLE CAUSE SUGGESTED REMEDY
Vent fan working OK, but amber
“REPLACE PREFILTER” light ON. Prefilter is at end of service life Replace prefilter
Vacuum Switch VS3 damaged Replace vacuum switch VS3
“REPLACE PREFILTER” light
turns on some of the time.
Pre-filter frame not hooked in
position at top Hook metal pre-filterframe at top to prevent air blowing around filter
Pre-filter position switch SW1
misadjusted or damaged. Check switch SW1, adjust or replace
Prefilter is nearing end of service
life Replace prefilter
Filter pack nearing end of its
service life Replace filter pack
Filter pack vacuum switch VS2
lines restricted or switch damaged. Check switch VS2, repair vacuum lines or replace switch.
Vent fan not operating and buzzer
is sounding.
Appliance newly installed and
Ansul® system not yet charged.
Check status of Ansul® system at
rear of unit, if fired, call Ansul®
Service Distributor for set-up.
Ansul® system has been set off by
overtemp condition, or manual pull
station has been activated.
Check status of Ansul® system at
rear of unit, if fired, call Ansul®
Service Distributor for
replacement of fire suppression
agent and propellant. If fuse link
has been activated, it must be
replaced prior to re-cocking the
Ansul® system.
Vent fan not operating.
Buzzer silent.
Green “POWER” light ON.
Amber “CHECK FILTER” light and
red “SERVICE REQUIRED” light
ON.
Grease baffle not installed Install grease baffle.
Grease baffle position switch SW2
misadjusted or damaged. Check switch SW2, adjust or replace
“REPLACE FILTER PACK” light
ON.

GRIDDLE
GRIDDLE UNIT - OPERATIONAL NOTES
16
SV502 SvcManual WVG-136(RW)
CAUTION:
BURN HAZARD
Griddle surfaces are very hot during
operation. Allow unit to cool before
performing any service.
1. The main cooking appliance is a Wells G-136 Griddle.
2. The griddle has two individually controllable sections. Control
is via capillary and bulb thermostat with DPST switch.
3. Each section is heated by two identical elements, wired in
parallel.
4. Griddle is powered by the cooking appliance contactor.
IMPORTANT:
The griddle surface must be seasoned prior to use, and after each
cleaning. Refer to Operation Manual for WVG-136 p/n 304986.
REMOVABLE SPLASH GUARD
PULL
HANDLE
IN CASE OF
FIRE
ANSUL
G-136 GRIDDLE UNIT
THERMOSTAT (typical)
CONTROL
PANEL
GREASE
DRAWER
CONTROL
KNOB
(typical)

GRIDDLE
17
SV502 SvcManual WVG-136(RW)
GRIDDLE UNIT - SERVICING INSTRUCTIONS
REPLACE THERMOSTAT
1. Disconnect unit from electric power and allow to cool before
servicing.
2. Withdraw grease tray from unit. Empty grease into an appropriate
container.
3. Remove six screws from recessed lip of control panel. Remove
control panel from unit.
4. Remove griddle control knob by pulling straight off.
5. Note position of wires on thermostat. Disconnect wires, then
remove thermostat from control panel. Withdraw thermobulb from
thermowell in griddle element assembly.
IMPORTANT: Do not damage capilary tubes.
6. Insert thermobulb of new thermostat fully into thermowell. Be
careful that capillary tube is not damaged.
7. Verify that fishpaper insulator is properly in place, then attach new
thermostat to control panel. Reconnect wiring.
8. Reinstall control panel and grease tray.
9. Reconnect unit to electric power and test for proper operation.
REPLACE INDICATOR LIGHT
1. Remove control panel from unit as detailed above.
2. Disconnect wires from indicator. Remove indicator by collapsing
retaining ears with a flat-blade screwdriver. Withdraw indicator
from control panel.
3. Push new indicator into mounting hole until both retaining ears
snap into place. Reconnect wires.
4. Reassemble unit. reconnect to electric power and test for proper
operation.
WARNING
HOT SURFACES
Griddle surface can be VERY
HOT and may cause severe
burns on contact.
CAUTION:
SHOCK HAZARD
Disconnect electric power before
servicing.
IMPORTANT:
Do not cut, pinch, twist or kink
thermostat capillary tube. This
will render the thermostat
inoperable, and cannot be
repaired.

GRIDDLE
18
GRIDDLE UNIT - SERVICING INSTRUCTIONS (continued)
REPLACE HEATING ELEMENT(S)
1. Disconnect unit from electric power and allow to cool before
servicing.
2. Withdraw grease tray from unit. Empty grease into an appropriate
container.
3. Remove six screws from recessed lip of control panel. Remove
control panel from unit (including grease tray sleeve). Withdraw
thermostat bulbs from griddle plate.
IMPORTANT: Do not damage capilary tubes.
4. Griddle assembly is held in place by Wellslok fasteners. Twist
Wellsloks inward to release. Cut seal at top panel, then lift griddle
assembly from top of unit.
5. Remove bottom panel from griddle plate assembly.
6. Note and mark position of wiring on elements. Disconnect wiring
from elements.
7. Mark insulation for orientation. Fold insulation retainers to allow
insulation to be removed. Carefully lift insulation from griddle.
8. Remove element clamps as necessary. Replace element(s), then
reinstall clamps (refer to Clamping Diagram on page 19). Be sure
to use anti-sieze on element clamp studs.
9. Reinstall insulation. Reconnect wiring.
10. Apply fresh sealant to bottonedge of griddle assembly. Lower
assembly into unit, then secure by turning out Wellsloks. Apply a
thin bead of food-grade silicone completely around edge of
assembly to seal it to the top panel.
11. Reinsert thermobulbs, then reinstall control panel.
12, Reconnect unit to electric power and test for proper operation.
WARNING
HOT SURFACES
Griddle surface can be VERY
HOT and may cause severe
burns on contact.
CAUTION:
SHOCK HAZARD
Disconnect electric power before
servicing.
Wellslok Fastener
Power Lead Connection
NOTE:
Examine connectors for
condition. Replace any that are
burned, distorted or excessively
discolored.
IMPORTANT:
Do not cut, pinch, twist or kink
thermostat capillary tube. This
will render the thermostat
inoperable, and cannot be
repaired.
NUT
LEAD
JUMPER
(WHEN USED)
NUT
ELEMENT
BOTTOM OF TOP PANEL
SV502 SvcManual WVG-136(RW)