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.
2M-Z16247 Rev. H
04/2018
LIMITED EQUIPMENT WARRANTY
Wells Manufacturing warranties new products to be free from defects
in material and/or workmanship for a period of one [1] year from the
date of original installation, except as noted below. 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 Wellsauthorized 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 .
CO NTAC T
Should you require any assistance regarding the operation or
maintenance of any Wells equipment; write, phone, fax or email
our service department. In all correspondence mention the
model number and the serial number of your unit, as well as
the voltage or type of gas you are using.
Business hours are 8:00 a.m. to 4:30 p.m. Central Standard Time
Telephone 314.678.6314
Fax 314.781.2714
Email customerservice@star-mfg.com
www.wells-mfg.com
WARRA
THE FOLLOWING WILL NOT BE COVERED UNDER WARRANTY.
• Any product which has not been installed, cleaned, maintained,
or used in accordance with the directions published in the appropriate
installation sheet and/or owner’s manual as well as national and local
codes, including incorrect gas or electrical connection. Wells is not liable for any unit which has been mishandled, abused, misapplied, subjected to chlorides, harsh chemicals, or caustic cleaners, damaged from exposure to hard water, 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, cleaningof 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 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.
• Parts that fail or are damaged due to normal wear or labor for
replacement of Items that can easily be replaced during a dailycleaning routine. such as but not limited to silicone belts, PTFE non-stick sheets, knobs, control labels, bulbs, fuses, quartz heatingelements, baskets, racks, and grease drawers.
• Components that should be replaced when damaged or worn, but have
been field-repaired instead [eg. field-welded fry pots].
• Any loss of business or profits.
ADDITIONAL WARRANTIES
Specialty/chain specific versions may also have additional and/or
extended warranties.
NTY EXCLUSIONS
PRODUCTSPARTSLABOR
universal ventless hoods2 years1 year
canopy hoods2 years1 year
“Cook’n Hold” equipment [HW10,
HWSMP, LLSC7, LLSC7WA, LLSC11,
2 years1 year
an d LLSC 1 1WA]
cast iron grates, burners, and burner
shields
original Wells parts sold to repair
Wells equipment
1 year
90 days
Service First1 year
The fore going warrant y is in lieu of any and a ll other warranti es expresse d or implied and c onstitutes the e ntire warranty. 2M-Z22393 • Rev A • 02.2018
TABLE OF CONTENTS
GENERAL WARRANTY STATEMENT
ELECTRICAL SPECIFICATIONS
FEATURES & OPERATING CONTROLS
PRECAUTIONS & GENERAL INFORMATION
AGENCY LISTING INFORMATION
INSTALLATION
Unpacking & Inspection
Components
Under-Hood Appliance Limitations
Service Technician Installation Notes
Base Assembly
Electrical Installation
ANSUL® INSTALLATION & SETUP
Filter Installation
OPERATION
Operation Lights
CLEANING INSTRUCTIONS
DISCHARGE DIRECTION CHANGE
REQUIRED MAINTENANCE & MAINTENANCE LOGS
TROUBLESHOOTING SUGGESTIONS
WIRING DIAGRAM
EXPLODED VIEW & PARTS LIST
PARTS & SERVICE
CUSTOMER SERVICE DATA
1
2-3
4
5
5
5
5
6-7
8
9-10
11-12
13-14
15
16
16
17-18
19
20-24
25
26-27
28-37
38
38
INTRODUCTION
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.
ELECTRICAL SPECIFICATIONS
ModelVoltsAmpsPower Supply
WVU48
WVU968.0
M522 p/n 2M-Z16247 OpM WVU- Universal Hood
208/240V
3.5
For supply connection use #12 AWG copper wire only.
1
FEATURES & OPERATING CONTROLS
20
1
4356
24
15
17
16
19
18
21
22
23
14
13
1211
2
VENTILATOR CONTROL PANEL
see page 15
7
8
9
10
Ventilator Section Operating Features & Controls
2
IL2391a
M522 p/n 2M-Z16247 OpM WVU- Universal Hood
FEATURES & OPERATING CONTROLS continued
FEATURES & OPERATION CONTROLS
ITEM NODESCRIPTIONCOMMENT
1VENTILATOR EXHAUST DUCT, TOPExit point for ventilator airow - on top of unit. DO NOT BLOCK
2VENTILATOR EXHAUST DUCT, FRONTExit point for ventilator airow - on front of unit. DO NOT BLOCK
3VENTILATOR FANProvides air movement for ventilation
4HI-EFFICIENCY/CHARCOAL FILTER PACKRemoves grease and smoke particles. Also assists in cooking odor removal.
5NAMEPLATE
6FIRE SUPPRESSION TANKContainer for ANSUL® Low-pH Liquid re suppression uid.
7ACTUATOR ASSY
8ANSUL® CARTRIDGEPropels suppression liquid through suppression manifold and nozzles.
9MANUAL PULL STATION
10ADJUSTABLE LEGSAllows the unit to be leveled.
11AIR WALLA wall of air that moves the grease and smoke particles into the lter system.
19GROUND LUGGround wire of power connection connects here.
20EQUIPMENT INTERFACE CONTACTOR
21BUILDING FIRE ALARM RELAYReports re alarm condition to building re management system.
22DETECTION END OF LINE RELAYPrevents appliance operation if a fault is found in detection circuit.
23SUPPLY CONNECTION TERMINAL BLOCKProvides connection point for electrical circuitry
24FILTER INTERLOCK SWITCHES
Gives manufacturer, make and model description. Also list voltage and
amperage data.
Triggers deployment of suppression uid through manual pull station or
electric detection.
Provides a means of manual activation of the re suppression system. PULL
ONLY IN CASE OF FIRE!
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
Comprises the PRE-FILTER FRAME and a replaceable PRE-FILTER.
Stops large particles of grease from reaching the FILTER PACK for reduced
maintenance costs.
Energizes cooking appliances only while ventilator section is sensed as
operational.
Proper installation of bafe lter and lter pack closes these switches in
ventilator sensor circuit
M522 p/n 2M-Z16247 OpM WVU- Universal Hood
3
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
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 insufcient
airow 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 sufcient 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.
in the preparation 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
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 qualied technical personnel.
Any procedure which requires the use of tools must be performed by a
qualied 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 sizes on all hardware.
Warranty for this unit is 2 years for parts and 1 year for labor with
proper installation/start-up and maintenance.
for commercial establishments for use
200 cfm per linear foot of hood
M522 p/n 2M-Z16247 OpM WVU- Universal Hood
4
AGENCY LISTING INFORMATION
SANITATION
This appliance conforms to NSF Standard 2 for sanitation only if
installed in accordance with the supplied Installation Instructions
and operated and maintained in accordance with the instructions in this
manual.
UL CLASSIFIED for use in US and Canada
NSF/ANSI 2
UL710B
Recurculating System
INSTALLATION
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
Ansul® components - must be installed by an authorized Ansul®
distributor only:
4 ft 8 ft
2 ea. 4 ea. Fire suppression agent tank
2 ea. 4 ea. Fire suppression agent (Ansulex® Low pH) 1.5 gal.
1 ea. 2 ea. Fire suppression system charging cartridge
Store these components in a convenient place for later use.
The unit is shipped congured 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.
M522 p/n 2M-Z16247 OpM WVU- Universal Hood
6. Replace front discharge vent panel.
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 qualied
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 certied 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.
5
INSTALLATION (continued)
UNDER-HOOD APPLIANCE LIMITATIONS:
M522 p/n 2M-Z16247 OpM WVU- Universal Hood
6
INSTALLATION (continued)
UNDER-HOOD APPLIANCE LIMITATIONS:
M522 p/n 2M-Z16247 OpM WVU- Universal Hood
7
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 dened in the
Under Hood Cooking Appliance Limitations, page 6.
Installation and start up 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 specications 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 specic 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. Ceiling height shall be no less than 103”
inches when utilizing horizontal discharge option. Ceiling height shall
be no less than 120” inches when utilizing vertical 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 deection, 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.
M522 p/n 2M-Z16247 OpM WVU- Universal Hood
8
INSTALLATION (continued)
Hardware Provided
Nut; 2C-6517
Washer; 2C-A27469
Bolt; 2C-Z5555
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 Stiffener (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.
IL2977
Front
Front
IL2387
Bottom Stiffener
Figure 1
IL2388
p/n: N1-Z14159
9
Figure 2
Corner Bracket
6” Adj. Legs
Figure 3
p/n: N1-Z14158
IL2389
M522 p/n 2M-Z16247 OpM WVU- Universal Hood
INSTALLATION (continued)
Base Deflectors
Figure 4
High Temp 350°F
RTV Sealant
6.Align the two base deectors (Fig 4) in place and
secure with screws (8 per deector)
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 &
SUPPRESSION SYSTEM INSTALLATION
sections in this manual.
12. Once complete the side panels can be installed
IL2390b
using hardware provided.
FIRE
M522 p/n 2M-Z16247 OpM WVU- Universal Hood
Figure 5
10
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.
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
ELECTRICAL INSTALLATION
Refer to the nameplate on the ventilator. Verify ELECTRICAL
SERVICE POWER. Voltage and phase must match the nameplate
specications, and available electrical service amperage must meet or
exceed the listed amperage. Refer to specications listed on page 1 of
this manual.
The ground lug of this ventilator must be connected to a suitable
building ground.
Remove the left side panel to access the cooking appliance contactor
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 requres a single phase (1ph), 208 or 240 volt, 20
amp suppy. 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-off circuit, through a customer supplied contactor. This
contactor must be a UL listed, denite 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 Cutoff 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.
CUSTOMER
SUPPLIED
CONTACTOR(S)
TB1
TB2
L1L2
LINE INPUT
208-240VAC
50/60HZ
TO APPLIANCE
OVER CURRENT
PROTECTED
SUPPLY
EQUIPMENT INTERFACE OPTION 1
TO CUSTOMER
SUPPLIED APPLIANCE
CONTACTOR
(240V CNTR CIRCUIT)
OPTION 1
208/240V
TB3
APPLIANCE
CONTROL
TB4
EQUIPMENT
CUTOFF
TERMINALS
TB3
TB4
TB5
TO CUSTOMER
SUPPLIED
SWITCHING
DEVICE (SPST)
OPTION 2
CUSTOMER
SUPPLIED
CONTACTOR(S)
11
TB6
TB7
TB8
BUILDING
ALARM
INTERFACE
TO APPLIANCE
OVER CURRENT
PROTECTED
SUPPLY
EQUIPMENT INTERFACE OPTION 2
SOURCE CIRCUIT
T3
TB5
TB6
L3
CUSTOMER
SUPPLIED
SPST
SWITCHED
EQUIPMENT
CUTOFF
TERMINALS
IL2376a
M522 p/n 2M-Z16247 OpM WVU- Universal Hood
INSTALLATION continued
SUPPLY POWER INSTALLATION
FIRE
ALARM
SYSTEM
SUPPLY
POWER
TO HOOD
APPLIANCE(S)
POWER
SUPPLY
HOOD
INTERFACE
CONTACTOR(S)
POWER
TO
APPLIANCE(S)
IL2392
DANGER:
SHOCK HAZARD
Turn power off 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.
M522 p/n 2M-Z16247 OpM WVU- Universal Hood
12
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