Wells WVU-1P Service Manual

WELLS MANUFACTURING

265 Hobson Street, Smithville, Tennessee 37166

telephone: [phone]

fax: [phone]

www.wells-mfg

.com

OWNERS MANUAL

VENTLESS UNIVERSAL

MODULAR HOOD SYSTEM

for

ELECTRIC

COOKING

APPLIANCES

521

Model WVU-1

MODEL

WVU-1

WVU-1P

Manual Includes

INSTALLATION

USE & CARE

EXPLODED VIEW

PARTS LIST

WIRING DIAGRAM

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.

2M-Z17085 Rev. D

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 [phone]

Fax [phone]

Email [e-mail]

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, 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 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 daily cleaning
routine. such as but not limited to silicone belts, PTFE non-stick sheets,
knobs, control labels, bulbs, fuses, quartz heating elements, 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

PRODUCTS PARTS LABOR

universal ventless hoods 2 years 1 year

canopy hoods 2 years 1 year

“Cook’n Hold” equipment [HW10,

HWSMP, LLSC7, LLSC7WA, LLSC11,

2 years 1 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 First 1 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

WARRANTY
SPECIFICATIONS 1
FEATURES & OPERATING CONTROLS 2
PRECAUTIONS & GENERAL INFORMATION 3
AGENCY LISTING INFORMATION 4
INSTALLATION 4
ANSUL® INSTALLATION & SETUP 7
OPERATION 10
CLEANING INSTRUCTIONS 11
REQUIRED MAINTENANCE & MAINTENANCE LOGS 13
MSDS Ansulex Low-pH ™ 16
TROUBLESHOOTING SUGGESTIONS 18
WIRING DIAGRAM 19
EXPLODED VIEW & PARTS LIST 20
ANSUL® COMPONENTS 24

PARTS & SERVICE 25
CUSTOMER SERVICE DATA 25

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

VOLTS

MODEL

WVU-1 208/240V 6A 1.4kW

50/60Hz

1 ø

AMPS

1ø

WATTS POWER SUPPLY

Ventilator hood requires NEMA 6-15R receptacle.
Each cooking appliance requires a circuit sized to
the appliance power requirements, connected to an
interlock contactor with 208/240 volt control coil rating.

UNDER-HOOD APPLIANCE LIMITATIONS:

Appliance Maximum output of 22Kw

1.

2. Cooking surface must be 34-38” (864—965mm) from oor, no more than 25.5”

(648mm) from back wall, no wider than 24” (610mm)

3. Appliance must be installed per manufactures instructions.

4. Electrical appliance only. Not Intended for gas red units.

M521 p/n 2M-Z17085 OpM WVU- Universal Hood

1

FEATURES & OPERATING CONTROLS

A

IR

F

L

O

W

FILTER PACK
(PARTIALLY
INSTALLED)

ANSUL® NOZZLE
ON SWIVEL

CONTROL PANEL/

FILTER ACCESS

SYSTEM
EXHAUST
OUTLET

ADJUSTABLE LEG

ANSUL®
PULL STATION

ELECTRICAL
CONNECTION BOX

APPLIANCE
LIGHTS

AREA UNDER HOOD

(LOOKING UP)

FILTER PACK
(IN PLACE)

GREASE
BAFFLE
(REMOVED)

GREASE CUP

ANSUL® NOZZLE
ON SWIVEL

AREA BEHIND FILTERS

(LOOKING UP)

ANSUL® SERIES
DETECTOR W/
212ºF FUSIBLE LINK

ANSUL® SERIES

DETECTOR W/

165ºF FUSIBLE LINK

PRESSURE
SENSOR TAP

VENTILATOR

FAN

ANSUL®

NOZZLE

ANSUL®

NOZZLE

FILTER

GREASE BAFFLE

APPLIANCE
LIGHTS

CHECK FILTER CHANGE FILTER

SERVICE REQUIRED

LIGHTED POWER

SWITCH (GREEN)

"CHECK FILTERS"

FILTER(S) OUT OF

POSITION INDICATOR

(AMBER)

"REPLACE FILTERS"

FILTERS NEARING

END OF SERVICE LIFE

INDICATOR (AMBER)

"SERVICE REQUIRED"

FILTERS EXPENDED

INDICATOR (RED -

SYSTEM SHUT DOWN)

CONTROL PANEL

PANEL LATCHES

IL1825 Rev. -

Universal Ventless Hood Features & Operating Controls

2

M521 p/n 2M-Z17085 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
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 400 cfm 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
Instructions included in the literature package shipped with the unit.

Also see Under Hood Cooking Appliance Limitations, page 1.

Do not connect or energize this appliance until all installation
instructions are read and followed. Damage to the ventilator and/or

cooking appliances 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 stream approved. Do not direct water jet or
steam jet at this appliance, or at any control panel or wiring. Do not
splash or pour water on, in or over any controls, control panel or wiring.

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 it is
sold or moved to another location.

M521 p/n 2M-Z17085 OpM WVU- Universal Hood

This appliance is made in the USA. Unless otherwise noted, this
appliance has American sizes on all hardware.

for commercial establishments for use

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 insufcient
airow for proper operation.
Also, power to the cooking

appliances is interrupted if

either the lter pack or the
grease bafe is removed.

It is the responsibility of
the store management to

maintain sufcient spares
of lter packs to avoid

prolonged shutdown of the

ventilator when this lter
pack is expended. Filter
packs cannot be cleaned.

Wells Manufacturing
assumes no liability for loss

of business due to lter

related shutdown.

3

AGENCY LISTING INFORMATION

This appliance conforms to NSF Standard 4 for sanitation only if
installed in accordance with the supplied Installation Instructions
and operated and maintained in accordance with the instructions in this
manual.

STD 4

UL710B

This appliance is ETL listed.

Recurculating System

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.

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 the Installation

Instruction Sheet packed with the appliance before starting any

installation.

Read and understand all labels and diagrams attached to the
ventilator.

Carefully account for all components and accessories before

discarding packing materials.

COMPONENTS

Per module:

1 ea. Grease bafe

1 ea. Filter pack
1 ea Grease cup

Ansul® components - must be installed by an authorized ANSUL®

distributor only:

1 ea. Fire suppression agent tank

1 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.

IMPORTANT:

After cooking appliances

are positioned under the
hood, swivel nozzles must
be positioned per Ansul®
recommendations.

M521 p/n 2M-Z17085 OpM WVU- Universal Hood

4

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, page 1.

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 specications

listed in this manual, with local code requirements, and in accordance
with the STANDARD FOR VENTILATON CONTROL AND FIRE
PROTECTION OF COMMERCIAL COOKING OPERATIONS as
detailed in N.F.P.A 96 (current edition).

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 . Any
restraint device must allow access to the back and sides of the unit to

provide for servicing and maintenance, and must not interfere with the

operation of the re suppression system.

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

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. Unit requires a minimum of 96” (oor to

overhead) to allow for adequate air circulation and replacement of

lters. Combustible object from the top must be 99” or higher, or 3”

above the unit while the control panel door is open.

Verify that the unit sits rmly on all legs or casters depending on your
model. With a spirit level, check that the appliance is level front-to­back 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.

Refer to the General Layout Data

Wells Technical Services “service@wells-bloomeld.com”). Maintain

required clearances between the appliance and adjacent combustible

M521 p/n 2M-Z17085 OpM WVU- Universal Hood

surfaces.

for required clearances (contact

5

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.

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.

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

The 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
malfunction.

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.

Remove the lower rear panel to access the cooking appliance
contactor and building alarm relay. Remove the appropriate knockout,
then wire the cooking appliance to the LOAD side of the contactor.

NOTE: If the provided power cord is not used, it is the responsibility

of the electrical contractor to provide suitable wiring, exible or ridgid

conduit, and an appropriate strain relief.

The cooking appliance under the ventilator hood must be connected
to the LOAD side of the cooking appliance contactor, located in the
electrical connection box. The contactor functions control the cooking
applance in the event of ventilator malfunction or appliance re.

The ventilator provides a dry contact relay connection for a building re

management system. This pilot-duty relay may be required by local

re codes, however, Wells Bloomeld strongly recommends that such

system be properly utilized in any case.

The alarm relay is activated by the Ansul® re detection system. If the

installation includes a building alarm system, connect to either the N.O.
or N.C. contacts of the relay (as required by the building alarm system).

The ventilator will operate properly, and the 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. The grease bafe and lter pack are in position and serviceable,
and the ventilator pressure sensing system is satised.

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.

M521 p/n 2M-Z17085 OpM WVU- Universal Hood

6

INSTALLATION

FIRE SUPPRESSION SYSTEM INSTALLATION

FIRE SUPPRESSION SYSTEM is comprised of a container of

Ansulex® Low pH liquid re suppression media and a system

pressurization canister for each module, plus associated plumbing.
Actuation controls are contained in the Automan enclosure.

Two FUSIBLE LINKS are utilized for automatic actuation of the re
suppression system. Additionally, 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.

Three NOZZLES disperse the re suppression media. Two inner

nozzles protect the fan and plenum. The third, front mounted, nozzle

is 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.

When the re suppression system discharges, cooking appliance
contactor and building re alarm relay are de-energized; and, the re

suppression media discharged. Fire supression media will form an

emulsion designed to both smother and cool the fuels in/on the cooking

appliance.

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:

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.

M521 p/n 2M-Z17085 OpM WVU- Universal Hood

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.

7