Wells WVU96 User manual

WELLS BLOOMFIELD, LLC
265 Hobson St. • Smithville, TN 37166
telephone: [phone]
wells-mfg.com
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.
OWNERS MANUAL
VENTLESS UNIVERSAL
HOOD SYSTEM
for
ELECTRIC
COOKING
APPLIANCES
MODEL
WVU96
Manual Includes
INSTALLATION
USE & CARE
EXPLODED VIEW
PARTS LIST
WIRING DIAGRAM
522-2
2M-Z23216 REV C (08-22)
Model WVU-96

LIMITED EQUIPMENT WARRANTY
Wells Manufacturing warrants to the original purchaser of new Wells
products to be free from defects in material or workmanship, under normal
and proper use and maintenance service as specified by Wells and upon
proper installation and start-up in accordance with the instructions
supplied with each Wells unit. Wells’ obligation under this warranty is
limited to a period of one [1] year from the date of original installation, or
eighteen [18] months from original invoice date, whichever occurs first.
Defects that occur as a result of normal use, within the time period and
limitations defined in this warranty, will at Wells’ discretion have the parts
replaced or repaired by Wells or a Wells-authorized service agency.
THIS WARRANTY IS SUBJECT TO ALL LISTED CONDITIONS
Repairs performed under this warranty are to be performed by a Wells
authorized service agency. Wells will not be responsible for charges
incurred or service performed by non-authorized repair agencies. In all
cases, the nearest Wells-authorized service agency must be used. Wells will
be responsible for normal labor charges incurred in the repair or
replacement of a warrantied product within 50 miles (80.5 km) of an
authorized service agency. Time and expense charges for anything beyond
that distance will be the responsibility of the owner. All labor will need to
be performed during regular service hours. Any overtime premium will be
charged to the owner. For all shipments outside the U.S.A. and Canada,
please see the International Warranty for specific details. It is the
responsibility of the owner to inspect and report any shipping damage
claims, hidden or otherwise, promptly following delivery. No mileage or
travel charges will be honored on any equipment that is deemed portable.
In general, equipment with a cord and plug weighing less than 50 lb. (22.7
kg) is considered portable and should be taken or shipped to the closest
authorized service agency, transportation prepaid.
CONTACT
Should you require any assistance regarding the operation or maintenance
of any Wells Manufacturing; phone or email our service department. In all
correspondence provide the model number and serial number of the unit
needing service; include the voltage or gas type.
Normal Business Hours: 8:00 a.m. to 4:30 p.m. Central
Telephone: [phone] Tech Service Option 2
Email: [e-mail]
www.Wells-Mfg.com
WARRANTY EXCLUSIONS
THE FOLLOWING WILL NOT BE COVERED UNDER WARRANTY.
Wells’ sole obligation under this warranty is limited to either repair or
replacement parts, subject to the additional limitations detailed
below. This warranty neither assumes nor authorizes any person to
assume obligations other than those expressly covered by this
warranty.
• Any product which has not been used, maintained, or installed in
accordance with the directions published in the appropriate
installation sheet and/or owner’s manual, including incorrect gas or
electrical connection. Wells is not liable for any unit which has been
mishandled, abused, misapplied, subjected to harsh chemicals,
modified by unauthorized personnel, damaged by flood, fire, or other
acts of nature [or God], or which have an altered or missing serial
number.
• Installation, labor, and job checkouts, calibration of heat controls,
air and gas burner/bypass/pilot adjustments, gas or electrical system
checks, voltage and phase conversions, cleaning of equipment, or
seasoning of griddle surface.
• Replacement of fuses or resetting of circuit breakers, safety
controls, or reset buttons.
• Replacement of broken or damaged glass components, quartz
heating elements, and light bulbs.
• Labor charges for all removable and consumable parts in gas
charbroilers and hotplates, including but not limited to burners,
grates, and radiants.
• Any labor charges incurred by delays, waiting time, or operating
restrictions that hinder a service technician’s ability to perform
service.
• Replacement of parts that fail or are damaged due to normal wear
or labor for replacement of parts that can be replaced during a daily
cleaning routine, such as but not limited to silicone belts, PTFE non-
stick sheets, control labels, knobs, bulbs, fuses, quartz heating
elements, baskets, racks, and grease drawers.
• Any economic loss of business or profits.
• Non-OEM parts. Use of non-OEM parts without Wells’ approval will
void the warranty.
• Units exceeding one [1] year from original installation date, or more
than eighteen [18] months from original invoice date, whichever
comes first.
ADDITIONAL WARRANTIES
• Specific/chain-specific equipment may have additional and/or
extended warranties.
The foregoing warranty is in lieu of any and all other warran�es
expressed or implied and cons�tutes the en�re warranty.
xi

M522 p/n 2M-Z23216 OpM WVU- Universal Hood
1
Thank You for purchasing this Wells Manufacturing appliance.
Proper installation, professional operation and consistent maintenance of this appliance will ensure
that it gives you the very best performance and a long, economical service life.
This manual contains information and instructions for the ventless ventilation hood, its use and care.
For information regarding cooking appliance(s), please refer to the manufacturer’s operation manual.
Note: Wells Ventless does not qualify for free prepaid freight. Wells Ventless is made to order and is
non-refundable.
TABLE OF CONTENTS
ELECTRICAL SPECIFICATIONS
INTRODUCTION
Model Volts Amps Power Supply
WVU96 208/240V 8.0 For supply connection use #12 AWG copper wire only.
WARRANTY xi
ELECTRICAL SPECIFICATIONS 1
FEATURES & OPERATING CONTROLS 2-3
PRECAUTIONS & GENERAL INFORMATION 4
INSTALLATION 5
Unpacking & Inspection 5
Components 5
Under-Hood Appliance Limitations 6-7
Service Technician Installation Notes 8-9
Base Assembly 10-11
Electrical Installation 12-13
ANSUL® INSTALLATION & SETUP 14-15
Filter Installation 16
OPERATION 17
Operation Lights 17
CLEANING INSTRUCTIONS 18-19
DISCHARGE DIRECTION CHANGE 20
REQUIRED MAINTENANCE & MAINTENANCE LOGS 21-25
TROUBLESHOOTING SUGGESTIONS 26
WIRING DIAGRAM 27
EXPLODED VIEW & PARTS LIST 28-37
PARTS & SERVICE 38
CUSTOMER SERVICE DATA 38
APPLICATION FOR VENTLESS APPROVALS 39-40

2
M522 p/n 2M-Z23216 OpM WVU- Universal Hood
FEATURES & OPERATING CONTROLS
IL2391a
12 11
13
14
20
19
15
24
10
9
43 5 6
7
8
16
17
2
22
23
21
1
18
Ventilator Section Operating Features & Controls

M522 p/n 2M-Z23216 OpM WVU- Universal Hood
3
FEATURES & OPERATING CONTROLS continued
FEATURES & OPERATION CONTROLS
ITEM
NO DESCRIPTION COMMENT
1VENTILATOR EXHAUST DUCT,
TOP Exit point for ventilator airow - on top of unit. DO NOT BLOCK
2VENTILATOR EXHAUST DUCT,
FRONT
Exit point for ventilator airow - on front of unit. DO NOT
BLOCK
3 VENTILATOR FAN Provides air movement for ventilation
4HI-EFFICIENCY/CHARCOAL
FILTER PACK
Removes grease and smoke particles. Also assists in cooking
odor removal.
5 NAMEPLATE Gives manufacturer, make and model description. Also list
voltage and amperage data.
6FIRE SUPPRESSION TANK Container for ANSUL® Low-pH Liquid re suppression uid.
7ACTUATOR ASSY Triggers deployment of suppression uid through manual pull
station or electric detection.
8 ANSUL® CARTRIDGE Propels suppression liquid through suppression manifold and
nozzles.
9 MANUAL PULL STATION Provides a means of manual activation of the re suppression
system. PULL ONLY IN CASE OF FIRE!
10 ADJUSTABLE LEGS Allows the unit to be leveled.
11 AIR WALL A wall of air that moves the grease and smoke particles into the
lter system.
12 DISCHARGE NOZZLES Fire suppression media discharges here, (6 places 48”, 12
places 96”)
13 ELECTRICAL DETECTORS
Designed to activate at certain temperature. Activates (i.e. re
on the cooktop) activates re suppression system. Should be
checked every 6 months during ANSUL® Service Inspection
14 APPLIANCE LIGHT ON when hood power switch is ON. Illuminates cooking area.
15 GREASE DRIP TRAY Collects grease/moisture dripping from ba󰀪e lter (16)
16 BAFFLE FILTER Extracts and drains most greases and moisture from the air
ow.
17 PRE-FILTER ASSEMBLY
Comprises the PRE-FILTER FRAME and a replaceable PRE-
FILTER. Stops large particles of grease from reaching the
FILTER PACK for reduced maintenance costs.
18 ELECTRICAL CONNECTION BOX Houses electrical components
19 GROUND LUG Ground wire of power connection connects here.
20 EQUIPMENT INTERFACE
CONTACTOR
Energizes cooking appliances only while ventilator section is
sensed as operational.
21 BUILDING FIRE ALARM RELAY Reports re alarm condition to building re management
system.
22 DETECTION END OF LINE
RELAY
Prevents appliance operation if a fault is found in detection
circuit.
23 SUPPLY CONNECTION
TERMINAL BLOCK Provides connection point for electrical circuitry
24 FILTER INTERLOCK SWITCHES Proper installation of ba󰀪e lter and lter pack closes these
switches in ventilator sensor circuit

4
M522 p/n 2M-Z23216 OpM WVU- Universal Hood
PRECAUTIONS AND GENERAL INFORMATION
This ventilator hood is part of an engineered system and is intended for
use in commercial establishments only.
This ventilator is intended for commercial establishments for use
in the preparation of 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.
This ventilator hood system is designed to reduce odor emissions,
but will not completely eliminate all cooking odors. Air exchange
rates at the installation site must comply with the requirements of the
local jurisdictional authority. To ensure that odors do not accumulate,
recommended minimum air exchange is 200 cfm per linear foot of hood
into and out of the site.
This unit is intended for use with light- and medium duty electric
cooking appliances only. Cooking appliances placed under this
ventilator must comply with the restrictions set forth in the Installation
section of this manual.
Do not connect or energize this appliance until all installation
instructions are read and understood. Property damage or bodily
injury may result if these instructions are not followed. Disconnect this
appliance from electrical power before performing any maintenance or
servicing.
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.
This appliance is not jet steam approved. Do not direct water jet or
steam jet at this appliance, or at any control panel or wiring.
Do not splash or pour water on, in or over any controls, control panel or
wiring. Do not attempt to wash lter packs. Water will cause their
immediate failure and disable the ventilator.
Exposed surfaces of this appliance can be hot to the touch and may
cause burns.
Avoid storing ammable or combustible materials in, on or near the
ventilator or associated cooking appliance.
The technical content of this manual, including any wiring diagrams,
schematics, parts breakdown illustrations and/or adjustment
procedures, is intended for use by qualied technical personnel.
Any procedure which requires the use of tools must be performed by a
qualied technician.
All supplied instructions, diagrams, schematics, parts breakdown
illustrations, notices and labels must remain with the appliance if the
unit is sold or moved to another location.
This appliance is made in the USA. Unless otherwise noted, this
appliance has American (SAE) sizes on all hardware.
DANGER:
SUFFOCATION HAZARD
Do not attempt to use this
ventilator with gas-red units.
This ventilator will not remove
products of combustion.
Unvented exhaust gasses
can be deadly.
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.
IMPORTANT:
The ventilator is disabled
when the lters are plugged
to the point of insu󰀩cient
airow for proper operation.
Also, power to the cooking
appliances is interrupted if
any lters or service panel
are removed.
It is the responsibility of
the store management to
maintain su󰀩cient spares
of lter packs to avoid
prolonged shutdown due
to a dirty or clogged lter
pack. Filter packs cannot be
cleaned.
Wells Manufacturing
assumes no liability for loss
of business due to a lter
related shutdown. Spare
lters can be purchased
from any authorized Wells
servicer or calling Wells.

M522 p/n 2M-Z23216 OpM WVU- Universal Hood
5
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 qualied
technician with full knowledge
of all applicable electrical
codes. Failure can result in
personal injury and property
damage.
IMPORTANT:
Fire suppression system must
be charged and certied by an
authorized Ansul® distributor.
Ventilator will not operate and
cooking appliance will not be
energized until the Ansul® re
suppression system has been
charged.
IMPORTANT:
After cooking appliances
are positioned under the
hood, swivel nozzles must
be positioned per Ansul®
recommendations.
UNPACKING & INSPECTION
Carefully remove the appliance from the carton. Remove all
protective plastic lm, 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 any other docments
packed with the appliance before starting any installation.
All documentation should remain with the equipment operator for future
reference.
Read and understand all labels and diagrams attached to the
ventilator.
Carefully account for all components and accessories before
discarding packing materials.
COMPONENTS
4 ft
Pre-Filter 2 ea.
Ba󰀪e Filter 2 ea.
Filter pack 1 ea.
Grease cup 1 ea.
Ansul® components - must be installed by an authorized Ansul®
distributor only:
4 ft
2 ea. Fire suppression agent tank
2 ea. Fire suppression agent (Ansulex® Low pH) 1.5 gal.
1 ea. Fire suppression system charging cartridge
Store these components in a convenient place for later use.
The unit is shipped congured for horizontal discharge of the exhaust.
To convert to vertical discharge:
1. Remove top access cover.
2. Remove internal turning vane.
3. Insert top discharge scoop assy and fasten w/hardware from cover.
4. Remove front dischage vent panel and damper assy.
5. Assemble damper in Top discharge scoop assy.
6. Replace front discharge vent panel.

6
M522 p/n 2M-Z23216 OpM WVU- Universal Hood
INSTALLATION (continued)
UNDER-HOOD APPLIANCE LIMITATIONS:
WELLS MANUFACTURING
265 HOBSON STREET
SMITHVILLE, TN 37166, USA
36.0 IN
THE ENTIRE CEILING
(INCLUDING DROP CEILINGS)
SHALL BE NO LESS THAN 108 IN
(274.3 CM) WHEN UTILIZING
HORIZONTAL (FRONT)
DISCHARGE OPTION.
THE ENTIRE CEILING
(INCLUDING DROP CEILINGS)
SHALL BE NO LESS THAN 120 IN
(304.8 CM) WHEN UTILIZING
VERTIC AL (T OP) DISCHARGE
OPTION.
J (08-22)

M522 p/n 2M-Z23216 OpM WVU- Universal Hood
7
INSTALLATION (continued)
UNDER-HOOD APPLIANCE LIMITATIONS:
(1) LID OF THE APPLIANCE MUST NOT INTERFERE WITH SUPPRESSION NOZZLE DISCHARGE PATTERN.
(2) PLUS OVEN KW IF AVAILABLE
Special Instruction: Any Oven or Combi with a vertical exhaust will need to have a diverter or diffuser to redirect away from thermal detectors.
* Charbroilers and Smokers are not allowed under Wells ventless
2M-Z24736_G_(08-22)

8
M522 p/n 2M-Z23216 OpM WVU- Universal Hood
INSTALLATION (continued)
SERVICE TECHNICIAN INSTALLATION NOTES
This ventilator hood is to be used with light-duty and medium-duty
electrically powered cooking appliances only.
•DO NOT attempt to use this ventilator hood with gas-red units.
•DO NOT use this ventilator hood with electrical appliances whose
dimensions or wattage characteristics exceed those dened in the
Under Hood Cooking Appliance Limitations, pages above.
Installation and demonstration must be performed by an Authorized
Installation Company.
Ansul® Installer must complete the WARRANTY INITIATION form
(2M-303912) included with the unit for the warranty to begin, and record
installation particulars on the CUSTOMER SERVICE DATA form
located at the end of this manual.
IT IS THE RESPONSIBILITY OF THE INSTALLER TO verify that this
VENTILATOR installation is in compliance with the specications listed
in this manual, with local code requirements, and in accordance with
N.F.P.A 96 the STANDARD FOR VENTILATON CONTROL AND FIRE
PROTECTION OF COMMERCIAL COOKING OPERATIONS.
NOTE: Certain codes require FRYERS to be restrained with a
TETHER or other RESTRAINT DEVICE. If this ventilator is to be used
with a fryer, it is the RESPONSIBILITY OF THE INSTALLER to check
with the AUTHORITY HAVING JURISDICTION, in order to ascertain
the applicability of this requirement to this specic installation .
SETUP
Setup the appliance only on a rm, level, non-combustible surface.
Verify local codes for requirements. Concrete, tile, terrazzo or metal
surfaces are recommended. Metal over combustible material may not
meet code for non-combustible surfaces.
Verify vertical clearances. The entire ceiling (including drop ceilings)
shall be no less than 108 in (274.3 cm) when utilizing horizontal (front)
discharge option. The entire ceiling (including drop ceilings) shall be
no less than 120 in (304.8 cm) when utilizing vertical (top) discharge
option.
Verify that the unit sits rmly on ALL LEGS. With a spirit level, check
that the appliance is level front-to-back and side-to-side. With the
adjustable legs, adjust as required to level the appliance. In order to
prevent tipping or deection, legs must be adjusted such that all legs
are in rm contact with the oor.
DANGER:
SUFFOCATION HAZARD
Do not attempt to use this
ventilator with gas-red units.
This ventilator will not remove
products of combustion.
Unvented exhaust gasses
can be deadly.
WARNING:
SHOCK HAZARD
All servicing requiring
access to non-insulated
electrical components must
be performed by a factory
authorized technician.
DO NOT open any access
panel which requires the use
of tools. Failure to follow this
warning can result in severe
electrical shock.
CAUTION:
RISK OF
DAMAGE
DO NOT connect or energize
this appliance until all
installation instructions are
read and followed. Property
damage or bodily injury could
result if these instructions are
not followed.
IMPORTANT:
If a remote pull station is to
be used, ventilator cannot be
moved without rst disabling
the remote pull station.
Contact your Ansul® agent
for details.
TOOLS REQUIRED
RATCHET
3/4” SOCKET
3/4” OPEN END WRENCH
7/16” DEEPWELL SOCKET
7/16” OPEN END WRENCH
PROCEDURE & PARTSPROCEDURE & PARTS
TOOLS REQUIRED
2”X4”X(LENGTH OF HOOD OR MORE)
WOOD BRACE
CRESCENT WRENCH
#2 PHILIPS SCREWDRIVER
FLAT HEAD SCREWDRIVER
FOOD GRADE NSF APPROVED SILICONE

M522 p/n 2M-Z23216 OpM WVU- Universal Hood
9
Plan the installation area for the hood. The following diagram includes the required clearances for the
hood installation, this is regardless of the type of hood mount, and equipment underneath that is to be used
under the hood.
THE ENTIRE CEILING
(INCLUDING DROP CEILINGS) SHALL BE NO LESS THAN 108 IN (274.3 CM) WHEN UTILIZING HORIZONTAL
(FRONT) DISCHARGE OPTION.
THE ENTIRE CEILING
(INCLUDING DROP CEILINGS) SHALL BE NO LESS THAN 120 IN (304.8 CM) WHEN UTILIZING VERTICAL (TOP)
DISCHARGE OPTION.
Wall clearances specified per NFPA 96, clause 4.2 must be maintained between the hood and combustible,
limited-combustible, and noncombustible materials. For reference, these clearances are 18 in. (457mm)
to combustible material, 3 in. (76 mm) to limited-combustible material, and 0 in. (0mm) to noncombustible
material.
Allow 6” of clearance on the right side of the hood for installation of the remote pull station.
!CRITICAL!
Table: Hood weights.
Model(S) Weight (lb. / kg)
WVU-96 1366 lb. (531 kg.)
There are floor mounted bases available and these can be ordered as a separate kit.
The installation will require lifting equipment to raise the hood to the installed height.
SUMMARYSUMMARY
36.0 IN
THE ENT IRE CEILING
(INCLUDING DROP CEILINGS)
SHALL BE NO LESS THAN 108 IN
(274 .3 CM) WHEN UTILIZING
HORIZONTAL (F RONT )
DISCHARGE OPTION.
THE ENT IRE CEILING
(INCLUDING DROP CEILINGS)
SHALL BE NO LESS THAN 120 IN
(304.8 CM) WHEN UTILIZING
VERTICAL (TOP) DISCH ARGE
OPTION.

10
M522 p/n 2M-Z23216 OpM WVU- Universal Hood
INSTALLATION (continued)
Front
Bottom Stiffener
IL2387
Figure 1
Front
IL2388
Figure 2
Corner Bracket
6” Adj. Legs
IL2389
p/n: N1-Z14159
p/n: N1-Z14158
Figure 3
BASE ASSEMBLY
Prior to assembling the base, locate it as close to the
nial position as possible. Then follow these steps.
1. Align the two rear panels (Fig 1) and secure with a
bolt, washer and nut (8 places).
2. Place the Base Bottom Sti󰀨ener (N1-Z15330) to the
bottom of the two rear panels and secure with bolt,
washer and nut (8 places).
3. Align the left and right side of the base to the rear
panel (Fig 2) and secure with bolt, washer and nut
(8 places each side).
4. Align the rear corner brackets in place (Fig 3) and
secure with bolt, washer and nut
(4 places each bracket).
5. Install the 6” adjustable legs and secure in place with
the bolt provided.
Hardware Provided
IL2977
Nut; 2C-6517
Washer; 2C-A27469
Bolt; 2C-Z5555

M522 p/n 2M-Z23216 OpM WVU- Universal Hood
11
INSTALLATION (continued)
Base Deflectors
Figure 4
IL2390b
High Temp 350°F
RTV Sealant
Figure 5
6. Align the two base deectors (Fig 4) in place and
secure with screws (8 per deector)
7. Move the base into position, and using a level,
adjust the legs until level.
8. Remove the side panels of the hood assembly so
when lowered onto the base assembly it will be
easier to secure in place.
9. Apply a bead of RTV Sealant with a temperature
rating of 375°F on the base (between the base
and hood, once hood is lowered) as shown in
(Fig 5). Follow the warning that come with the
sealant. DO NOT allow a lm to form on the
bead before lowering the hood down on the
base. If a lm forms, remove the bead and re-
apply a new bead.
IMPORTANT: BEFORE APPLYING RTV
SEALANT, CLEAN ALL RECIEVING
SURFACES OF ANY DIRT, GREASE OR
FORGIEN MATERIAL.
10. Using the upper supporting brackets on the hood,
lower the hood on top of the base (Fig 5) so the
mounting holes line up. Secure with bolt, washer
and nut (7 places each side).
11. Contact your electrical & Ansul® contractors
to provide service to the system. Refer to
the ELECTRICAL INSTALLATION & FIRE
SUPPRESSION SYSTEM INSTALLATION
sections in this manual.
12. Once complete the side panels can be installed
using hardware provided.

12
M522 p/n 2M-Z23216 OpM WVU- Universal Hood
ELECTRICAL INSTALLATION
Refer to the nameplate on the ventilator. Verify ELECTRICAL
SERVICE POWER. Voltage and phase must match the nameplate
specications, and available electrical service amperage must meet or
exceed the listed amperage. Refer to specications listed on page 1 of
this manual.
The ground lug of this ventilator must be connected to a suitable
building ground.
Open the front acces panel to access the terminal blcok and building
alarm relay. Remove the appropriate knockout, then wire the cooking
appliance control circuit to the terminal block per Fig below.
NOTE: It is the responsibility of the electrical contractor to provide
suitable wiring, exible or rigid conduit, and an appropriate strain relief.
Electrical Connection
NOTE: The hood requires a single phase (1ph), 208 or 240 volt, 20
amp supply at 60 Hz. When connecting line voltage to the unit’s
terminal block, use a minimum of #12 gage copper wire only, suitable
for 167°F (76°C) ambient temperature.
Appliance Connections
All under hood appliances are required to be interlocked with the hood’s
equipment cut-o󰀨 circuit, through a customer supplied contactor. Shunt trip
breakers are not authorized. This contactor must be a UL listed, denite
purpose AC resistive air heating type, suitable for the appliance load.
Installation and connections shall be in accordance with the National Electric
Code NFPA 70. These connections provide an automatic shutdown of the
appliance when the hood is OFF, or in the event of a malfunction or appliance
re.
Equipment Cuto󰀨 Connections
Opt 1: Use TB#3 & TB#4 for 208 or 240 volt control circuit. These contacts will be
de-energized when the hood is OFF or in the event of a malfunction
Opt 2: Use TB#5 & TB#6 as a Normally Closed SPST relay connection for equipment
control circuits with voltages other than 208 or 240 AC. These contacts will be
open when hood is OFF or in the event of a malfunction.
INSTALLATION
DANGER:
SUFFOCATION HAZARD
Do not attempt to use this
ventilator with gas-red units.
This ventilator will not remove
products of combustion.
Unvented exhaust gasses
can be deadly.
WARNING
SHOCK HAZARD
Electrical connections must
be made by a licensed
electrician.
CAUTION:
FIRE HAZARD
HEALTH HAZARD
All cooking appliance must
be connected to the cooking
appliance contactor, the
control circuit of which is
controlled by the ventilator.
Note: Shunt trip breakers
are not an authorized control
circuit.
TB1 TB6 TB7 TB8 TB2 TB3 TB4 TB5
LINE INPUT
208-240VAC
50/60HZ
BUILDING
ALARM
INTERFACE
TO CUSTOMER
SUPPLIED
SWITCHING
DEVICE (SPST)
OPTION 2
TO CUSTOMER
SUPPLIED APPLIANCE
CONTACTOR
(240V CNTR CIRCUIT)
OPTION 1
L1 L2
IL2376a
TB3
TB4
208/240V
APPLIANCE
CONTROL
EQUIPMENT
CUTOFF
TERMINALS
CUSTOMER
SUPPLIED
CONTACTOR(S)
TO APPLIANCE
OVER CURRENT
PROTECTED
SUPPLY
EQUIPMENT INTERFACE OPTION 1
SPST
SWITCHED
EQUIPMENT
CUTOFF
TERMINALS
TB5
TB6
CUSTOMER
SUPPLIED
CONTACTOR(S)
CUSTOMER
SUPPLIED
SOURCE CIRCUIT
TO APPLIANCE
OVER CURRENT
PROTECTED
SUPPLY
L3
T3
EQUIPMENT INTERFACE OPTION 2

M522 p/n 2M-Z23216 OpM WVU- Universal Hood
13
DANGER:
SHOCK HAZARD
Turn power o󰀨 to the unit
before removing the side
electrical box cover.
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.
CAUTION:
FIRE HAZARD
HEALTH HAZARD
Failure to control cooking
appliances will provide no
protection in the event of a
re, nor will cooking vapors
and odors be contained in
the event of ventilator hood
malfunction.
INSTALLATION continued
SUPPLY POWER INSTALLATION
IL2392
FIRE
ALARM
SYSTEM
SUPPLY
POWER
TO HOOD
APPLIANCE(S)
POWER
SUPPLY
HOOD
INTERFACE
CONTACTOR(S)
POWER
TO
APPLIANCE(S)
Shunt trip
breakers are
not authorized

14
M522 p/n 2M-Z23216 OpM WVU- Universal Hood
INSTALLATION continued
DANGER
FIRE HAZARD
Fire suppression system
must be charged and certied
by an authorized Ansul®
distributor.
DO NOT attempt to modify or
bypass the re suppression
system.
An uncontrolled re can
cause serious injury or death.
NOTE:
Ansul Deployments are not
covered under warranty.
Technical service needs to
be contacted immediately
and a deployment kit of parts
needs to be replaced before
unit is put back in service. If
the re suppression system
is discharged, a buzzer will
sound continuously. The
unit will remain inoperable
until the re suppression
system is serviced, recharged
and reset by an authorized
Ansul® distributor.
Charging of the Ansul®
Fire Suppression system
must be in accordance with
Ansul® Design, Installation,
Recharge and Maintenance
Manual, #418087.
NOTE:
If a REMOTE MANUAL PULL
STATION is installed, moving
the ventilator for any reason
may cause the Ansul®
system to discharge.
IMPORTANT:
Should the re suppression
system discharge: all
nozzles must be replaced,
and all lines thoroughly
cleaned, prior to recharging
the system. Residual re
suppression media may
compromise the ow and
dispersion of re suppression
media in any subsequent
activation.
The alarm relay is activated by the Ansul® re detection system. If the
installation includes a building alarm system, connect to terminals T7 &
T8 of the terminal block in supply connection box. These terminals are
congured from the factory for normally open operation.
The ventilator will operate properly, and the appliance control relay will
be energized, only when:
1. The VENTILATOR POWER SWITCH is “ON”.
2. The Ansul® Fire Suppression System is charged and armed.
3. All lters are in position and serviceable, and the ventilator air ow
system is satised.
FIRE SUPPRESSION SYSTEM INSTALLATION
EACH 4’ FOOT SECTION OF THE FIRE SUPPRESSION SYSTEM
is comprised of two containers of Ansulex® Low pH liquid re
suppression media and a system pressurization canister, plus
associated plumbing. Actuation controls are contained in the Automan
enclosure.
The hood is supplied with a eld installed MANUAL PULL STATION,
which must be set-up at the time of installation by an authorized Ansul®
distributor.
The MANUAL PULL STATION allows for for manual emergency
shutdown of cooking appliance power, and actuation of the re
suppression system.
Twelve (WVU96) NOZZLES disperse the re suppression media. Two
inner nozzles protect the fan and plenum.
The appliance nozzles are swivel mounted, and must be directed
toward the cooking surface of the installed cooking appliance.
If the ventilator is situated such that the supplied manual pull
station cannot be installed or is not readily accessible, a REMOTE
MANUAL PULL STATION may be required by local codes. Any
such remote manual pull station must be installed by an authorized
Ansul® distributor in accordance with the AUTHORITY HAVING
JURISDICTION.
The re detection system utilizes twelve (WVU96) electronic thermal
detectors with an actuation set point of 325°F (163°C) in the upper
hood locations and 325°F (163°C) detectors in the lower wall locations.
The signaling from any of these detection devices will automatically
discharge the re suppression media through all nozzles, disable the
cooking appliances and cause the alarm to sound.
Fire suppression media will form an emulsion designed to both smother
and cool the fuels in/on the cooking appliance.
Ansul® Deployments are not covered under warranty. Technical service
needs to be contacted immediately and a deployment kit of parts needs
to be replaced before unit is put back in service. Any Ansul® media
must be throughly cleaned from every area of the unit before it can be
put back into service.

M522 p/n 2M-Z23216 OpM WVU- Universal Hood
15
INSTALLATION
DANGER
BURN HAZARD
Any additional remote pull
station must NOT be installed
on the front of the cooking
appliances,
Discharge of the re
extinguishing system into hot
grease or oil may cause hot
foam to spill over from the
cooking surface or frypot.
Serious burns and other injuries
can result from contact with hot
oil and from slipping in spilled
oil.
The manual pull station is
installed on the right side (facing
the unit. It may, however, be
relocated to the left side of the
ventilator hood by an authorized
Ansul® agent.
FIRE SUPPRESSION SYSTEM INSTALLATION (continued)
The MANUAL PULL STATION and any similar REMOTE MANUAL
PULL STATION will activate the re suppression system when the
ring on the pull station is pulled to its full extent.

16
M522 p/n 2M-Z23216 OpM WVU- Universal Hood
INSTALLATION
NOTE:
The BAFFLE FILTERS,
PRE-FILTERS and FILTER
PACK actuate position
switches when they are
properly positioned. They
must be properly installed
for the under hood cooking
appliance contactor to be
energized.
WARNING
SLIP AND FALL
HAZARD
DO NOT operate any
grease-producing cooking
appliance
(e.g. fryer or griddle) unless
the grease cup is properly
installed. Oil will drip onto oor
creating a slipping hazard.
CAUTION
BURN HAZARD
DO NOT operate any
cooking appliance unless the
grease cup is installed.
Moisture dripping onto hot
surfaces, oil or grease can
cause splattering.
WARNINIG: Do not add
moisture during cooking.
Note: Adding moisture
during the cooking process
may cause pre-lter to lose
structural integrity.
FILTER INSTALLATION
Note air ow direction arrow on lter pack. Remove old lter pack
and slide new lter pack fully into the appropriate slot. Verify that
the airow arrow points toward the fan.
Ba󰀪e lters are reusable and should be cleaned at least weekly.
Change pre-lters and smoke/odor lter pack as indicated on the front
panel. These lters are disposable and cannot be reused. The smoke
/ odor lter pack is accessed thru the front service door.
Pre-lters are located behind the ba󰀪e lters, when installing pre-lters
engage top retaining ange prior to seating pre-lter housing in lower
chamber.
Use only genuine Wells replacement parts and lters,
call [phone] your authorized Wells service agent or our
authorized parts supplier Partstown. Parts supplied by others will void
your warranty and may not provide safe operation.
BAFFLE FILTER and GREASE CUP INSTALLATION
1. Install ba󰀪e lter from front. Engage the ba󰀪e lter in the retainer
slot. Push up until the ba󰀪e lter bottom clears the lower lip of the
retainer, then lower the ba󰀪e lter into the bottom retainer
2. Install GREASE CUP into brackets below the ba󰀪e lter.
Note: Failure to install the GREASE CUP will allow grease and
moisture from the BAFFLE FILTER to drop into hot cooking surfaces,
creating both a SAFETY HAZARD (hot oil splatter) and a HEALTH
HAZARD (contamination of the cooking surface or cooking oil).
SIDE VIEW
SMOKE & ODOR
FILTER PACK
PART NO. WL0171
AIRFLOW
AIRFLOW
IL2377b
25.9 Min
Clearance
PREFILTER HOUSING MUST
HOOK IN FLANGE AT TOP.
CHECK TO MAKE SURE YOU
CANNOT PUSH IT BACK
AFTER INSTALLATION
BAFFLE FILTER
PART NO. 2I-Z14670
PREFILTER
PART NO. 2I-302579

M522 p/n 2M-Z23216 OpM WVU- Universal Hood
17
Control Panel
NOTE: Cooking appliances must be operated in accordance with the
manufacturer’s instructions.
During normal operation, the illuminated power switch will be the only
light on the control panel that will be ON.
If the CHECK FILTERS light illuminates, check BAFFLE FILTERS,
PREFILTERS, and the HEPA AIR FILTERS for proper installation.
If the REPLACE PRE-FILTERS light illuminates .. Replace the Pre-lters.
If the REPLACE FILTER light illuminates, replace the FILTER PACK.
NOTE: the REPLACE FILTERS light is a warning that lter pack is
nearing the end of its service life. The ventilator will continue to operate
for a period of time after the REPLACE FILTER LIGHT turns ON to allow
continued operation through a peak period. However, lter pack must be
replaced within a short time period or it will clog, disabling the ventilator
and appliances.
If the SERVICE REQUIRED light illuminates, the lter pack is restricted
to the point of insu󰀩cient airow for proper operation and the Ventilator
will shut down until the underlying clogged lter situation has been
corrected. Replace clogged item with a fresh lter to correct the
condition. Reset the unit by turning VENTILATOR POWER SWITCH to
OFF, then back to ON.
If the air curtain service required lights illuminate, there is insu󰀩cient
airow for proper operation. Call an authorized Wells Service Agent.
A failure of incoming electric power will cause a shut down of the unit.
Reset the unit by turning VENTILATOR POWER SWITCH to OFF, then
back to ON.
Operation Lights
There are three (WVU48) that provide illumination of the working area.
These lights are controlled by the main power switch.
CAUTION:
HOT SURFACE
Exposed surfaces can be hot
to the touch and may cause
burns.
CAUTION:
SHOCK HAZARD
DO NOT splash or pour water
or grease onto control panel
or wiring.
IMPORTANT:
The ventilator cannot operate
if the lter pack is removed or
clogged.
It is the responsibility of
the store management to
maintain su󰀩cient spares
of lter packs to avoid
prolonged shutdown of the
ventilator when this lter is
expended.
Filter packs cannot be
cleaned.
Wells Manufacturing assumes
no liability for loss of business
due to lter related shutdown.
Filters that are not genuine
Wells Replacement Parts
may cause your unit to
operate incorrectly and you
will risk the possibility of
voiding your warranty.
OPERATION
IL2374
ON
CHECK
FILTERS
REPLACE
PREFILTERS
REPLACE
FILTER PACK
AIR CURTAIN
SERVICE REQUIRED
SERVICE
REQUIRED
POWER
OFF

18
M522 p/n 2M-Z23216 OpM WVU- Universal Hood
CLEANING INSTRUCTIONS
PRECAUTIONS: Disconnect unit from electric power and allow to cool
Cover frypot to prevent oil contamination
FREQUENCY: Daily
TOOLS: Mild detergent, clean non-abrasive towels, 3M Scotch
brite for griddles
NOTE: Ventilator section to be cleaned in conjunction with cooking
appliance. Refer to appliance user instructions for cleaning procedure.
1. TURN HOOD POWER SWITCH TO OFF.
Cover cooking appliance to prevent oil contamination.
2. Remove BAFFLE FILTERS and GREASE CUP(s).
3. Empty GREASE CUP(s) into an appropriate grease collection receptacle.
4. Clean BAFFLE FILTERS and GREASE CUP(s) in a sink or dishwasher
using mild detergent and warm water.
5. Dry components with a clean non-abrasive cloth. Reinstall BAFFLE
FILTERS and GREASE CUP(s) in ventilator.
6. Wipe exterior of ventilator with a clean cloth moistened with warm water
and mild detergent. Rinse by wiping with a clean cloth moistened with
warm water.
7. Uncover the cooking appliance and reconnect unit to electric power.
Procedure is complete
CAUTION:
HOT SURFACE
Exposed surfaces can be hot
to the touch and may cause
burns. Allow unit to cool
before cleaning.
CAUTION:
SHOCK HAZARD
DO NOT splash or pour water
or grease onto control panel
or wiring.
DANGER
FIRE HAZARD
DO NOT clean heated
surfaces with water, or
Ansul® system may activate
due to sudden rise in
temperature change, causing
the re suppression system to
deploy.