Lincoln Electric PRISM AD2458-1 User manual

Operator’s Manual
PRISM EXHAUST HOOD
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IM10575 | Issue Date May-21
© Lincoln Global, Inc. All Rights Reserved.
For use with machines having Code Numbers:
AD2458-1 thru AD2458-46
Save for future reference
Date Purchased
Code: (ex: 10859)
Serial: (ex: U1060512345)
®

THANK YOU FOR SELECTING
A QUALITY PRODUCT BY
LINCOLN ELECTRIC.
PLEASE EXAMINE CARTON AND EQUIPMENT FOR
DAMAGE IMMEDIATELY
When this equipment is shipped, title passes to the purchaser
upon receipt by the carrier. Consequently, claims for material
damaged in shipment must be made by the purchaser against the
transportation company at the time the shipment is received.
SAFETY DEPENDS ON YOU
Lincoln arc welding and cutting equipment is designed and built
with safety in mind. However, your overall safety can be increased
by proper installation ... and thoughtful operation on your part.
DO NOT INSTALL, OPERATE OR REPAIR THIS EQUIPMENT
WITHOUT READING THIS MANUAL AND THE SAFETY
PRECAUTIONS CONTAINED THROUGHOUT. And, most importantly,
think before you act and be careful.
This statement appears where the information must be followed
exactly to avoid serious personal injury or loss of life.
This statement appears where the information must be followed
to avoid minor personal injury or damage to this equipment.
KEEP YOUR HEAD OUT OF THE FUMES.
DON’T get too close to the arc.
Use corrective lenses if necessary
to stay a reasonable distance
away from the arc.
READ and obey the Safety Data
Sheet (SDS) and the warning label
that appears on all containers of
welding materials.
USE ENOUGH VENTILATION or
exhaust at the arc, or both, to
keep the fumes and gases from
your breathing zone and the general area.
IN A LARGE ROOM OR OUTDOORS, natural ventilation may be
adequate if you keep your head out of the fumes (See below).
USE NATURAL DRAFTS or fans to keep the fumes away
from your face.
If you de velop unusual symptoms, see your supervisor.
Perhaps the welding atmosphere and ventilation system
should be checked.
WEAR CORRECT EYE, EAR &
BODY PROTECTION
PROTECT your eyes and face with welding helmet
properly fitted and with proper grade of filter plate
(See ANSI Z49.1).
PROTECT your body from welding spatter and arc
flash with protective clothing including woolen
clothing, flame-proof apron and gloves, leather
leggings, and high boots.
PROTECT others from splatter, flash, and glare
with protective screens or barriers.
IN SOME AREAS, protection from noise may be appropriate.
BE SURE protective equipment is in good condition.
Also, wear safety glasses in work area
AT ALL TIMES.
SPECIAL SITUATIONS
DO NOT WELD OR CUT containers or materials which previously
had been in contact with hazardous substances unless they are
properly cleaned. This is extremely dangerous.
DO NOT WELD OR CUT painted or plated parts unless special
precautions with ventilation have been taken. They can release
highly toxic fumes or gases.
Additional precautionary measures
PROTECT compressed gas cylinders from excessive heat,
mechanical shocks, and arcs; fasten cylinders so they cannot fall.
BE SURE cylinders are never grounded or part of an
electrical circuit.
REMOVE all potential fire hazards from welding area.
ALWAYS HAVE FIRE FIGHTING EQUIPMENT READY FOR
IMMEDIATE USE AND KNOW HOW TO USE IT.
WARNING
CAUTION
Safety 01 of 04 - 5/16/2018

SECTION A:
WARNINGS
CALIFORNIA PROPOSITION 65 WARNINGS
WARNING: Breathing diesel engine exhaust
exposes you to chemicals known to the State
of California to cause cancer and birth defects,
or other reproductive harm.
• Always start and operate the engine in a
well-ventilated area.
• If in an exposed area, vent the exhaust to the outside.
• Do not modify or tamper with the exhaust system.
• Do not idle the engine except as necessary.
For more information go to
www.P65 warnings.ca.gov/diesel
WARNING: This product, when used for welding or
cutting, produces fumes or gases which contain
chemicals known to the State of California to cause
birth defects and, in some cases, cancer. (California
Health & Safety Code § 25249.5 et seq.)
WARNING: Cancer and Reproductive Harm
www.P65warnings.ca.gov
ARC WELDING CAN BE HAZARDOUS. PROTECT
YOURSELF AND OTHERS FROM POSSIBLE SERIOUS
INJURY OR DEATH. KEEP CHILDREN AWAY.
PACEMAKER WEARERS SHOULD CONSULT WITH
THEIR DOCTOR BEFORE OPERATING.
Read and understand the following safety highlights. For
additional safety information, it is strongly recommended
that you purchase a copy of “Safety in Welding & Cutting -
ANSI Standard Z49.1” from the American Welding Society,
P.O. Box 351040, Miami, Florida 33135 or CSA Standard
W117.2. A Free copy of “Arc Welding Safety” booklet E205
is available from the Lincoln Electric Company, 22801
St. Clair Avenue, Cleveland, Ohio 44117-1199.
BE SURE THAT ALL INSTALLATION, OPERATION,
MAINTENANCE AND REPAIR PROCEDURES ARE
PERFORMED ONLY BY QUALIFIED INDIVIDUALS.
FOR ENGINE POWERED
EQUIPMENT.
1.a. Turn the engine off before troubleshooting
and maintenance work unless the
maintenance work requires it to be running.
1.b. Operate engines in open, well-ventilated areas or vent the engine
exhaust fumes outdoors.
1.c. Do not add the fuel near an open ˜ame welding
arc or when the engine is running. Stop the
engine and allow it to cool before refueling to
prevent spilled fuel from vaporizing on contact
with hot engine parts and igniting. Do not spill fuel when ÿlling
tank. If fuel is spilled, wipe it up and do not start engine until
fumes have been eliminated.
1.d. Keep all equipment safety guards, covers
and devices in position and in good repair.
Keep hands, hair, clothing and tools away
from V-belts, gears, fans and all other
moving parts when starting, operating or
repairing equipment.
1.e. In some cases it may be necessary to remove safety guards to
perform required maintenance. Remove guards only when
necessary and replace them when the maintenance requiring
their removal is complete. Always use the greatest care when
working near moving parts.
1.f. Do not put your hands near the engine fan. Do not attempt to
override the governor or idler by pushing on the throttle control
rods while the engine is running.
1.g. To prevent accidentally starting gasoline engines while turning
the engine or welding generator during maintenance work,
disconnect the spark plug wires, distributor cap or magneto wire
as appropriate.
1.h. To avoid scalding, do not remove the radiator
pressure cap when the engine is hot.
ELECTRIC AND
MAGNETIC FIELDS MAY
BE DANGEROUS
2.a. Electric current flowing through any conductor
causes localized Electric and Magnetic Fields (EMF).
Welding current creates EMF fields around welding
cables and welding machines
2.b. EMF fields may interfere with some pacemakers, and
welders having a pacemaker should consult their physician
before welding.
2.c. Exposure to EMF fields in welding may have other health effects
which are now not known.
2.d. All welders should use the following procedures in order to
minimize exposure to EMF fields from the welding circuit:
2.d.1. Route the electrode and work cables together - Secure
them with tape when possible.
2.d.2. Never coil the electrode lead around your body.
2.d.3. Do not place your body between the electrode and work
cables. If the electrode cable is on your right side, the
work cable should also be on your right side.
2.d.4. Connect the work cable to the workpiece as close as pos-
sible to the area being welded.
2.d.5. Do not work next to welding power source.
SAFETY
Safety 02 of 04 - 5/16/2018

ELECTRIC SHOCK
CAN KILL.
3.a. The electrode and work (or ground) circuits are
electrically “hot” when the welder is on. Do
not touch these “hot” parts with your bare skin or wet clothing.
Wear dry, hole-free gloves to insulate hands.
3.b. Insulate yourself from work and ground using dry insulation.
Make certain the insulation is large enough to cover your full area
of physical contact with work and ground.
In addition to the normal safety precautions, if
welding must be performed under electrically
hazardous conditions (in damp locations or while
wearing wet clothing; on metal structures such as
floors, gratings or scaffolds; when in cramped
positions such as sitting, kneeling or lying, if there
is a high risk of unavoidable or accidental contact
with the workpiece or ground) use the following
equipment:
• Semiautomatic DC Constant Voltage (Wire) Welder.
• DC Manual (Stick) Welder.
• AC Welder with Reduced Voltage Control.
3.c. In semiautomatic or automatic wire welding, the electrode,
electrode reel, welding head, nozzle or semiautomatic welding
gun are also electrically “hot”.
3.d. Always be sure the work cable makes a good electrical
connection with the metal being welded. The connection should
be as close as possible to the area being welded.
3.e. Ground the work or metal to be welded to a good electrical (earth)
ground.
3.f. Maintain the electrode holder, work clamp, welding cable and
welding machine in good, safe operating condition. Replace
damaged insulation.
3.g. Never dip the electrode in water for cooling.
3.h. Never simultaneously touch electrically “hot” parts of electrode
holders connected to two welders because voltage
between the
two can be the total of the open circuit voltage of both
welders.
3.i. When working above floor level, use a safety belt to protect
yourself from a fall should you get a shock.
3.j. Also see It ems 6.c. and 8.
ARC RAYS CAN BURN.
4.a. Use a shield with the proper filter and cover plates to protect your
eyes from sparks and the rays of the arc when welding or
observing open arc welding. Headshield and filter lens should
conform to ANSI Z87. I standards.
4.b. Use suitable clothing made from durable flame-resistant material
to protect your skin and that of your helpers from the arc rays.
4.c. Protect other nearby personnel with suitable, non-flammable
screening and/or warn them not to watch the arc nor expose
themselves to the arc rays or to hot spatter or metal.
FUMES AND GASES
CAN BE DANGEROUS.
5.a. Welding may produce fumes and gases
hazardous to health. Avoid breathing these
fumes and gases. When welding, keep your head out of the fume.
Use enough ventilation and/or exhaust at the arc to keep fumes
and gases away from the breathing zone. When welding
hardfacing (see instructions on container or SDS)
or on lead or cadmium plated steel and other
metals or coatings which produce highly toxic
fumes, keep exposure as low as possible and
within applicable OSHA PEL and ACGIH TLV limits
using local exhaust or mechanical ventilation
unless exposure assessments indicate otherwise.
In confined spaces or in some circumstances,
outdoors, a respirator may also be required.
Additional precautions are also required when
welding
on galvanized steel.
5. b. The operation of welding fume control equipment is affected by
various factors including proper use and positioning of the
equipment, maintenance of the equipment and the specific
welding procedure and application involved. Worker exposure
level should be checked upon installation and periodically
thereafter to be certain it is within applicable OSHA PEL and
ACGIH TLV limits.
5.c. Do not weld in locations near chlorinated hydrocarbon vapors
coming from degreasing, cleaning or spraying operations. The
heat and rays of the arc can react with solvent vapors to form
phosgene, a highly toxic gas, and other irritating products.
5.d. Shielding gases used for arc welding can displace air and
cause
injury or death. Always use enough ventilation, especially in
confined areas, to insure breathing air is safe.
5.e. Read and understand the manufacturer’s instructions for this
equipment and the consumables to be used, including the
Safety Data Sheet (SDS) and follow your employer’s safety
practices. SDS forms are available from your welding
distributor or from the manufacturer.
5.f. Also see item 1.b.
SAFETY
Safety 03 of 04 - 5/16/2018

WELDING AND CUTTING
SPARKS CAN CAUSE
FIRE OR EXPLOSION.
6.a. Remove fire hazards from the welding area. If
this is not possible, cover them to prevent the welding sparks
from starting a fire. Remember that welding sparks and hot
materials from welding can easily go through small cracks and
openings to adjacent areas. Avoid welding near hydraulic lines.
Have a fire extinguisher readily available.
6.b. Where compressed gases are to be used at the job site, special
precautions should be used to prevent hazardous situations.
Refer to “Safety in Welding and Cutting” (ANSI Standard Z49.1)
and the operating information for the equipment being used.
6.c. When not welding, make certain no part of the electrode circuit is
touching the work or ground. Accidental contact can cause
overheating and create a fire hazard.
6.d. Do not heat, cut or weld tanks, drums or containers until the
proper steps have been taken to insure that such procedures
will not cause flammable or toxic vapors from substances inside.
They can cause an explosion even though they have been
“cleaned”. For information, purchase “Recommended Safe
Practices for the Preparation for Welding and Cutting of
Containers and Piping That Have Held Hazardous Substances”,
AWS F4.1 from the American Welding Society
(see address above).
6.e. Vent hollow castings or containers before heating, cutting or
welding. They may explode.
6.f. Sparks and spatter are thrown from the welding arc. Wear oil free
protective garments such as leather gloves, heavy shirt, cuffless
trousers, high shoes and a cap over your hair. Wear ear plugs
when welding out of position or in confined places. Always wear
safety glasses with side shields when in a welding area.
6.g. Connect the work cable to the work as close to the welding area
as practical. Work cables connected to the building framework or
other locations away from the welding area increase the
possibility of the welding current passing through lifting chains,
crane cables or other alternate circuits. This can create fire
hazards or overheat lifting chains or cables until they fail.
6.h. Also see item 1.c.
6.I. Read and follow NFPA 51B “Standard for Fire Prevention During
Welding, Cutting and Other Hot Work”, available from NFPA, 1
Batterymarch Park, PO box 9101, Quincy, MA 022690-9101.
6.j. Do not use a welding power source for pipe thawing.
CYLINDER MAY EXPLODE IF
DAMAGED.
7.a. Use only compressed gas cylinders containing
the correct shielding gas for the process used
and properly operating regulators designed for
the gas and pressure used. All hoses, fittings,
etc. should be suitable for the application and
maintained in good condition.
7.b. Always keep cylinders in an upright position securely chained to
an undercarriage or fixed support.
7.c. Cylinders should be located:
• Away from areas where they may be struck or subjected
to physical damage.
• A safe distance from arc welding or cutting operations
and any other source of heat, sparks, or flame.
7.d. Never allow the electrode, electrode holder or any other
electrically “hot” parts to touch a cylinder.
7.e. Keep your head and face away from the cylinder valve outlet
when opening the cylinder valve.
7.f. Valve protection caps should always be in place and hand tight
except when the cylinder is in use or connected for use.
7.g. Read and follow the instructions on compressed gas cylinders,
associated equipment, and CGA publication P-l, “Precautions for
Safe Handling of Compressed Gases in Cylinders,” available from
the Compressed Gas Association, 14501 George Carter Way
Chantilly, VA 20151.
FOR ELECTRICALLY
POWERED EQUIPMENT.
8.a. Turn off input power using the disconnect
switch at the fuse box before working on
the equipment.
8.b. Install equipment in accordance with the U.S. National Electrical
Code, all local codes and the manufacturer’s recommendations.
8.c. Ground the equipment in accordance with the U.S. National
Electrical Code and the manufacturer’s recommendations.
Refer to
http://www.lincolnelectric.com/safety
for additional safety information.
SAFETY
Safety 04 of 04 - 5/16/2018

2
SAFETY
As a rule of thumb, for many mild steel electrode, if the air is visibly
clear and you are comfortable, then the ventilation is generally
adequate for your work. The most accurate way to determine if the
worker exposure does not exceed the applicable exposure limit for
compounds in the fumes and gases is to have an industrial hygienist
take and analyze a sample of the air you are breathing. This is
particularly important if you are welding with stainless, hardfacing or
Special Ventilation products. All Lincoln MSDS have a maximum fume
guideline number. f exposure to total fume is kept below that
number, exposure to all fume from the electrode (not coatings or
plating on the work) will be below the TLV.
There are steps that you can take to identify hazardous substances in
your welding environment. Read the product label and material safety
data sheet for the electrode posted in the work place or in the
electrode or flux container to see what fumes can be reasonably
expected from use of the product and to determine if special
ventilation is needed. Secondly, know what the base metal is and
determine if there is any paint, plating, or coating that could expose
you to toxic fumes and/or gases. Remove it from the metal being
welded, if possible. f you start to feel uncomfortable, dizzy or
nauseous, there is a possibility that you are being overexposed to
fumes and gases, or suffering from oxygen deficiency. Stop welding
and get some fresh air immediately. Notify your supervisor and co-
workers so the situation can be corrected and other workers can
avoid the hazard. Be sure you are following these safe practices, the
consumable labeling and MSDS to improve the ventilation in your
area. Do not continue welding until the situation has been corrected.
NOTE: The MSDS for all incoln consumables is available on incoln’s web-
site: www.lincolnelectric.com
Before we turn to the methods available to control welding fume
exposure, you should understand a few basic terms:
Natura Venti ation is the movement of air through the
workplace caused by natural forces. Outside, this is usually
the wind. nside, this may be the flow of air through open
windows and doors.
Mechanica Venti ation is the movement of air through the
workplace caused by an electrical device such as a portable
fan or permanently mounted fan in the ceiling or wall.
Source Extraction (Local Exhaust) is a mechanical device
used to capture welding fume at or near the arc and filter
contaminants out of the air.
The ventilation or exhaust needed for your application depends upon
many factors such as:
• Workspace volume
• Workspace configuration
• Number of welders
• Welding process and current
• Consumables used (mild steel, hardfacing, stainless, etc.)
• Allowable levels (TLV, PEL, etc.)
• Material welded (including paint or plating)
• Natural airflow
Your work area has adequate ventilation when there is enough
ventilation and/or exhaust to control worker exposure to hazardous
materials in the welding fumes and gases so the applicable limits for
those materials is not exceeded. See chart of TLV and PEL for Typical
Electrode ngredients, the OSHA PEL (Permissible Exposure Limit), and
the recommended guideline, the ACG H TLV (Threshold Limit Value),
for many compounds found in welding fume.
Ventil tion
There are many methods which can be selected by the user to
provide adequate ventilation for the specific application. The following
section provides general information which may be helpful in
evaluating what type of ventilation equipment may be suitable for
your application. When ventilation equipment is installed, you should
confirm worker exposure is controlled within applicable OSHA PEL
and/or ACG H TLV. According to OSHA regulations, when welding and
cutting (mild steels), natural ventilation is usually considered
sufficient to meet requirements, provided that:
1. The room or welding area contains at least 10,000 cubic feet
(about 22' x 22' x 22') for each welder.
2. The ceiling height is not less than 16 feet.
3. Cross ventilation is not blocked by partitions, equipment, or
other structural barriers.
4. Welding is not done in a confined space.
Spaces that do not meet these requirements should be equipped with
mechanical ventilating equipment that exhausts at least 2000 CFM of
air for each welder, except where local exhaust hoods or booths, or
air-line respirators are used.
Import nt S fety Note:
When welding with electrodes which require speci l
ventil tion such s st inless or h rdf cing (see
instructions on cont iner or MSDS) or on le d or
c dmium pl ted steel nd other met ls or co tings which
produce h z rdous fumes, keep exposure s low s
possible nd below exposure limit v lues (PEL nd TLV)
for m teri ls in the fume using loc l exh ust or
mech nic l ventil tion. In con ned sp ces or in some
circumst nces, for ex mple outdoors, respir tor m y
be required if exposure c nnot be controlled to the PEL
or TLV. (See MSDS nd ch rt of TLV nd PEL for Typic l
Electrode Ingredients.) Addition l prec utions re lso
required when welding on g lv nized steel.

3
SAFETY
BIBLIOGRA HY AND SUGGESTED READING
ANS Z87.1, Practice for Occupational and Educational Eye and Face
Protection, American National Standards nstitute, 11 West 42nd
Street, New York, NY 10036.
Arc Welding and Your Health: A Handbook of Health nformation for
Welding. Published by The American ndustrial Hygiene Association,
2700 Prosperity Avenue, Suite 250, Fairfax, VA 22031-4319.
NFPA Standard 51B, Cutting and Welding Processes, National Fire
Protection Association, 1 Batterymarch Park, P.O. Box 9146, Quincy,
MA 02269-9959.
OSHA General ndustry Standard 29 CFR 1910 Subpart Q. OSHA
Hazard Communication Standard 29 CFR 1910.1200. Available from
the Occupational Safety and Health Administration at
http://www.osha.org or contact your local OSHA office.
The following publications are published by The American Welding
Society, P.O. Box 351040, Miami, Florida 33135. AWS publications
may be purchased from the American Welding society at
http://www.aws.org or by contacting the AWS at 800-443-9353.
ANS , Standard Z49.1, Safety in Welding, Cutting and Allied
Processes. Z49.1 is now available for download at no charge at
http://www.lincolnelectric.com/community/safety/ or at the AWS
website http://www.aws.org.
AWS F1.1, Method for Sampling Airborne Particulates Generated by
Welding and Allied Processes.
AWS F1.2, Laboratory Method for Measuring Fume Generation Rates
and Total Fume Emission of Welding and Allied Processes.
AWS F1.3, Evaluating Contaminants in the Welding Environment: A
Strategic Sampling Guide.
AWS F1.5, Methods for Sampling and Analyzing Gases from Welding
and Allied Processes.
AWS F3.2, Ventilation Guide for Welding Fume Control
AWS F4.1, Recommended Safe Practices for the Preparation for
Welding and Cutting of Containers and Piping That Have Held
Hazardous Substances.
AWS SHF, Safety and Health Facts Sheets. Available free of charge
from the AWS website at http://www.aws.org.
Supplemental Information:
(*) Not listed. Nuisance value maximum is 10 milligrams per cubic
meter. PE value for iron oxide is 10 milligrams per cubic meter.
T V value for iron oxide is 5 milligrams per cubic meter.
(**) As respirable dust.
(*****) Subject to the reporting requirements of Sections 311, 312,
and 313 of the Emergency Planning and Community Right-
to-Know Act of 1986 and of 40CFR 370 and 372.
(b) The PE for chromium (VI) is .005 milligrams per cubic meter as
an 8 hour time weighted average. The T V for water-soluble
chromium (VI) is 0.05 milligrams per cubic meter. The T V for
insoluble chromium (VI) is 0.01 milligrams per cubic meter.
(c) Values are for manganese fume. STE (Short Term Exposure
imit) is 3.0 milligrams per cubic meter. OSHA PE is a ceiling
value.
(****) The T V for soluble barium compounds is 0.5 mg/m3.
T V and PE values are as of October 2013. Always check Safety
Data Sheet (SDS) with product or on the incoln Electric website at
http://www.lincolnelectric.com
LISTED BELOW ARE SOME TY ICAL INGREDIENTS IN WELDING ELECTRODES AND
THEIR TLV (ACGIH) GUIDELINES AND EL (OSHA) EX OSURE LIMITS
INGREDIENTS CAS No. TLV mg/m3EL mg/m3
Aluminum and/or aluminum alloys (as AI)***** 7429-90-5 1.0 15
Aluminum oxide and/or Bauxite***** 1344-28-1 1. 0 5**
Barium compounds (as Ba)***** 513-77-9 0.5 0.5
Chromium and chromium alloys or compounds (as Cr)***** 7440-47-3 0.5(b) 0.5(b)
Hexavalent Chromium (Cr VI) 18540-29-9 0.05(b) .005(b)
Copper Fume 7440-50-8 0.2 0.1
Cobalt Compounds 7440-48-4 0.02 0.1
Fluorides (as F) 7789-75-5 2.5 2.5
Iron 7439-89-6 10* 10*
imestone and/or calcium carbonate 1317-65-3 10* 15
ithium compounds (as i) 554-13-2 15 10*
Magnesite 1309-48-4 10 15
Magnesium and/or magnesium alloys and compounds (as Mg) 7439-95-4 10* 10*
Manganese and/or manganese alloys and compounds (as Mn)***** 7439-96-5 0.02 5.0(c)
Mineral silicates 1332-58-7 5** 5**
Molybdenum alloys (as Mo) 7439-98-7 10 10
Nickel***** 7440-02-0 0.1 1
Silicates and other binders 1344-09-8 10* 10*
Silicon and/or silicon alloys and compounds (as Si) 7440-21-3 10* 10*
Strontium compounds (as Sr) 1633-05-2 10* 10*
Zirconium alloys and compounds (as Zr) 12004-83-0 5 5

4
TABLE OF CONTENTS
Installation.......................................................................................................................Section A
Technical Specifications.......................................................................................................A-1
General Description..............................................................................................................A-2
Roof Panel Assembly...........................................................................................................A-10
Mounting The Hood Side By Side For Dual and Triple Hood...............................................A-12
Installing On To The Existing Cell Wall/Fences...................................................................
A-13
Operation.........................................................................................................................Section B
Operation..............................................................................................................................B-1
Intended Use........................................................................................................................ B-1
Accessories..................................................................................................... Section C
Options / Accessories............................................................................................C-1
Maintenance.................................................................................................... Section D
Service, Maintenance and Repairs....................................................................... D-1
Maintenance..........................................................................................................D-1
Periodic Maintenance............................................................................................D-1
Maintenance Schedule..........................................................................................D-2
PARTS LIST ............................................................................................................... PARTS.LINCOLNELECTRIC.COM
Content/details may be changed or updated without notice. For most current Instruction Manuals, go to
parts.lincolnelectric.com.
Stand Alone Hood Using The Leg kits.................................................................................
A-15
Hung From Ceiling Using Hood Hanging Kit........................................................................
A-16
Curtain Installation................................................................................................................
A-17
Instructions To Trim The Hood............................................................................................
A-18
PRISM
® EXHAUST HOOD

A-1
INSTALLATION
PRISM®EXHAUST HOOD
TECHNICAL
SPECIFICATIONS
PRISM®EXHAUST HOOD
HOOD SIZE
MINIMUM HOOD SIZE 6.5 FT X 5.5 FT
MAXIMUM HOOD SIZE 7.5 FT X 20 FT
RECOMMENDED EXTRACTION CAPACITY
15-30 CFM/SQFT (WITH RECOMMENDED OPEN AREA)
PRESSURE LOSS OVER HOOD
Max. 1 in. WG (250 Pa)
AD2458-1 EXHAUST HOOD, PRISM 6.5FT X 7.5FT 6.5 7.5 48.8 1488 975 1463 180
AD2458-2 EXHAUST HOOD, PRISM 6.5FT X 6.5FT 6.5 6.5 42.3 1423 845 1268 170
AD2458-3 EXHAUST HOOD, PRISM 6.5FT X 11FT 6.5 11 71.5 2715 1430 2145 256
AD2458-4 EXHAUST HOOD, PRISM 6.5FT X 12FT 6.5 12 78.0 2780 1560 2340 268
AD2458-5 EXHAUST HOOD, PRISM 6.5FT X 13FT 6.5 13 84.5 2845 1690 2535 280
AD2458-6 EXHAUST HOOD, PRISM 6.5FT X 15.5FT 6.5 15.5 100.8 21008 2015 3023 334
AD2458-7 EXHAUST HOOD, PRISM 6.5FT X 16.5FT 6.5 16.5 107.3 21073 2145 3218 344
AD2458-8 EXHAUST HOOD, PRISM 6.5FT X 17.5FT 6.5 17.5 113.8 21138 2275 3413 360
AD2458-9 EXHAUST HOOD, PRISM 6.5FT X 18.5FT 6.5 18.5 120.3 21203 2405 3608 370
AD2458-10 EXHAUST HOOD, PRISM 6.5FT X 20FT 6.5 20 130.0 21300 2600 3900 410
AD2458-11 EXHAUST HOOD, PRISM 7.5FT X 7.5FT 7.5 7.5 56.3 1563 1125 1688 195
AD2458-12 EXHAUST HOOD, PRISM 7.5FT X 11FT 7.5 11 82.5 2825 1650 2475 275
AD2458-13 EXHAUST HOOD, PRISM 7.5FT X 12FT 7.5 12 90.0 2900 1800 2700 290
AD2458-14 EXHAUST HOOD, PRISM 7.5FT X 13FT 7.5 13 97.5 2975 1950 2925 300
AD2458-15 EXHAUST HOOD, PRISM 7.5FT X 15.5FT 7.5 15.5 116.3 21163 2325 3488 360
AD2458-16 EXHAUST HOOD, PRISM 7.5FT X 16.5FT 7.5 16.5 123.8 21238 2475 3713 370
AD2458-17 EXHAUST HOOD, PRISM 7.5FT X 18.5FT 7.5 18.5 138.8 21388 2775 4163 405
AD2458-18 EXHAUST HOOD, PRISM 7.5FT X 20FT 7.5 20 150.0 21500 3000 4500 440
AD2458-19 EXHAUST HOOD, PRISM 6.5FT X 7.5FT; SMR 6.5 7.5 48.8 1488 975 1463 215
AD2458-20 EXHAUST HOOD, PRISM 6.5FT X 6.5FT; SMR 6.5 6.5 42.3 1423 845 1268 195
AD2458-21 EXHAUST HOOD, PRISM 6.5FT X 11FT; SMR 6.5 11 71.5 2715 1430 2145 300
AD2458-22 EXHAUST HOOD, PRISM 6.5FT X 12FT; SMR 6.5 12 78.0 2780 1560 2340 320
AD2458-23 EXHAUST HOOD, PRISM 6.5FT X 13FT; SMR 6.5 13 84.5 2845 1690 2535 335
AD2458-24 EXHAUST HOOD, PRISM 6.5FT X 15.5FT; SMR 6.5 15.5 100.8 21008 2015 3023 400
AD2458-25 EXHAUST HOOD, PRISM 6.5FT X 16.5FT; SMR 6.5 16.5 107.3 21073 2145 3218 415
AD2458-26 EXHAUST HOOD, PRISM 6.5FT X 17.5FT; SMR 6.5 17.5 113.8 21138 2275 3413 430
AD2458-27 EXHAUST HOOD, PRISM 6.5FT X 18.5FT; SMR 6.5 18.5 120.3 21203 2405 3608 450
AD2458-28 EXHAUST HOOD, PRISM 6.5FT X 20FT; SMR 6.5 20 130.0 21300 2600 3900 490
AD2458-29 EXHAUST HOOD, PRISM 7.5FT X 7.5FT; SMR 7.5 7.5 56.3 1563 1125 1688 235
AD2458-30 EXHAUST HOOD, PRISM 7.5FT X 11FT; SMR 7.5 11 82.5 2825 1650 2475 330
AD2458-31 EXHAUST HOOD, PRISM 7.5FT X 12FT; SMR 7.5 12 90.0 2900 1800 2700 350
AD2458-32 EXHAUST HOOD, PRISM 7.5FT X 13FT; SMR 7.5 13 97.5 2975 1950 2925 370
AD2458-33 EXHAUST HOOD, PRISM 7.5FT X 15.5FT; SMR 7.5 15.5 116.3 21163 2325 3488 435
AD2458-34 EXHAUST HOOD, PRISM 7.5FT X 16.5FT; SMR 7.5 16.5 123.8 21238 2475 3713 455
AD2458-35 EXHAUST HOOD, PRISM 7.5FT X 18.5FT; SMR 7.5 18.5 138.8 21388 2775 4163 505
AD2458-36 EXHAUST HOOD, PRISM 7.5FT X 20FT; SMR 7.5 20 150.0 21500 3000 4500 540
AD2458-37 EXHAUST HOOD, PRISM 6.5FT X 5.5FT; SMR 6.5 5.5 35.8 1358 715 1073 175
AD2458-38 EXHAUST HOOD, PRISM 7.5FT X 5.5FT; SMR 7.5 5.5 41.3 1413 825 1238 195
AD2458-39 EXHAUST HOOD, PRISM 6.5FT X 9FT; SMR 6.5 958.5 1585 1170 1755 245
AD2458-40 EXHAUST HOOD, PRISM 7.5FT X 9FT; SMR 7.5 967.5 1675 1350 2025 270
AD2458-41 EXHAUST HOOD, PRISM 6.5FT X 10FT; SMR 6.5 10 65.0 2650 1300 1950 270
AD2458-42 EXHAUST HOOD, PRISM 7.5FT X 10FT; SMR 7.5 10 75.0 2750 1500 2250 300
AD2458-43 EXHAUST HOOD, PRISM 6.5FT X 14FT; SMR 6.5 14 91.0 2910 1820 2730 370
AD2458-44 EXHAUST HOOD, PRISM 7.5FT X 14FT; SMR 7.5 14 105.0 21050 2100 3150 385
AD2458-45 EXHAUST HOOD, PRISM 6.5FT X 8.5FT; SMR 6.5 8.5 55.3 1553 1105 1658 235
AD2458-46 EXHAUST HOOD, PRISM 7.5FT X 8.5FT; SMR 7.5 8.5 63.8 1638 1275 1913 255
NUMBER
OF INLETS
Air Flow(CFM) WEIGHT
(LBS)
1 AIR
CHANGES
PER MINUTE
2 AIR
CHANGES
PER MINUTE
3 AIR
CHANGES
PER MINUTE
Part Number Description WIDTH
(FT)
LENGTH
(FT)
Area
(SqFT)
SHEET METAL ROOFING
Part Number Description WIDTH
(FT)
LENGTH
(FT)
CLEAR POLYCARBONATE ROOFING
Air Flow(CFM)
WEIGHT
(LBS)
1 AIR
CHANGES
PER MINUTE
2 AIR
CHANGES
PER MINUTE
3 AIR
CHANGES
PER MINUTE
Area
(SqFT)
NUMBER
OF INLETS

A-2
INSTALLATION
1) Can be mounted on the pre-existing cell wall/post.
2) Can be mounted on optional legs using the leg kits.
3) Can be hung from the ceiling using chains.
4) A combination of 2 and 3 (e.g. 2 chains + 2 legs).
This chapter describes the installation of single Prism® Exhaust
Hood and the mounting details when two or more hoods are
attached to each other.
COMPONENTS
The Prism® Exhaust Hood consists of the following
main components (See Figure A.1 below):
FIGURE A.2: Assembled Prism® Exhaust Hood
TOOLS
UNPACKING
Check that the product is complete. The Prism® Exhaust Hood
is built up of the following components/sets:
Optionally available:
Electric drill
- socket 7 mm
- socket 10 mm
Pair of pliers to
fasten vertical
spacers
Jigsaw to make cut-
outs in Multi wall
Polycarbonate roof
panels
Glueing clamp for
mounting of legs
Razor knife for
cutting welding
strips
Fork-lift truck(s)
with long forks for
mounting of hood
XL: cargo lashing
(option)
XL: stack of pallets
(option)
• Single compartment Prism® Exhaust Hoods consist of
one row of Multi wall Polycarbonate roof panels.
• Single compartment Prism® exhaust hoods consist of
one row of sheet metal roof panels.
• Dual and triple hoods; when single compartment hoods
are attached to each other using connecting kits.
• Installation on the pre-existing cell wall/fence.
• Installation of hood hung from the ceiling.
• Curtain installation.
• Instructions for trimming/sizing the hood in the field.
FIGURE A.1
FIGURE A.3
A. Corner bracket
B. Connection bracket
C. Outer frame
D. Roof panel (Multi wall
Polycarbonate/sheet metal)
E. Duct collar
F. Outlet flange
G. End Plate
H. Baffle Plate
I. Outlet Roof panel
- Corner brackets
- Connection brackets
- Outer frames (available in 4.5 ft and 5.5 ft length). Number
varies based on the size of the hood.
- Roof panel (Multi wall Polycarbonate/Sheet metal)
- Outlet Roof panel with baffle kit attached
- Box with required hardware and double sided tape for Multi
wall Polycarbonate assembly.
- Instruction manual and Lincoln Electric logo for branding
- Shipment comes with pre-assembled width sections (6.5 ft or
7.5 ft)
- Leg kits with corner reinforcement braces.
- Curtain Kits (Cut to length curtains as per requirement).
- Connecting Kits (When double or triple hood need to be
mounted side by side).
- Riser/Strut kits for existing cell wall fences
- Hood hanging kit--for hanging the hood from the ceiling
- Light Kits
A
B
C
D
J
F
E
G
H
GENERAL DESCRIPTION
The Prism® Exhaust Hood is a reliable and practical solution to
contain and extract welding, cutting, arc gouging and grinding
fume from the work environment. It is designed to connect to an
mounting options of the hood.
PRISM®EXHAUST HOOD
WIDTH SECTION

A-3
INSTALLATION
NOTE: The best way to assemble a Prism®Exhaust Hood is to
place a stack of pallets under each corner of the hood and
one or two additional stacks under the loose ends of the
cross-profiles.
When positioning a standing hood XL in a corner:
• Position the hood in approximate location using two fork-
lift trucks.
• Put some pallets on the forks of one fork-lift truck.
If necessary, use additional beams.
• Lift the hood in the middle and place it on the final position.
MOUNTING POSSIBILITIES
For a hanging mounted configuration, check that the roof is
strong enough. Weights of Prism®Exhaust Hoods are listed in
the Technical specifications page.
Refer Assembly Reference Section of the manual for detailed
information.
Use proper material to mount the chains. If
necessary: consult the architect of the building.
CAUTION
- Option-1: Mount on to the pre-existing cell wall/post
- Option-2: Mount on the leg kits provided
- Option-3: Hung from the ceiling
- Option-4: Combination of both floor mounting and hanging
from the ceiling(with additional supporting structures).
PRISM®EXHAUST HOOD

A-4
INSTALLATION
PRISM®EXHAUST HOOD
THE LINCOLN ELECTRIC COMPANY
World's Leader in Welding and Cutting Products
Sales and Service through Subsidiaries and Distributors Worldwide
Cleveland, Ohio 44117-1199 U.S.A. M27517PRINT
A.04
NOTES: NA. ALL DIMENSIONS MENTIONED IN THIS DATA SHEET ARE
APPROXIMATE AND INDICATIVE, ACTUAL PHYSICAL ASSEMBLY DIMENSIONS MAY VARY ND SUBJECT TO CHANGE BASED ON MANUFACTURING DRAWINGS.
NB. EVERY OUTLET ROOF PANELS HAS TO BE MOUNTED TO THE
CENTER OF THE CORRESPONDING OUTER FRAME. EMBOSS IS PROVIDED AT THE CENTER OF THE FRAME FOR EASY IDENTIFICATION
NC. EVERY DETAILS REMAIN SAME AS ABOVE CHART FOR ALL
SHEET METAL ROOF PANEL ASSEMBLIES FROM (AD2458-19 TO -46). FOR WEIGHT DETAILS OF HOOD ASSEMBLIES FROM AD2458-19 TO -46 REFER TECHNICAL SPECIFICATIONS PAGE.
ND. DIMENSIONS A & B ARE OUTER DIMENSIONS OF THE HOOD NE. REFER DIMENSIONS C, D, E & F FOR MOUNTING THE HOOD USING
LEG KITS & RISER KITS
NF. WEIGHT IN THE TABLE ARE APPROXIMATE AND INDICATIVE. NG. OUTLET SIZE TO BE SELECTED BASED ON THE AIRFLOW REQUIREMENT.
B
A
AA
B BSECTION B-B
F
E
SECTION A-A
C
SINGLE OUTLET ROOF PANEL
NB
D
D
DETAIL D
DIM D, DIM F
DIM C, DIM E
N.G.

A-5
INSTALLATION
PRISM®EXHAUST HOOD
THE LINCOLN ELECTRIC COMPANY
World's Leader in Welding and Cutting Products
Sales and Service through Subsidiaries and Distributors Worldwide
Cleveland, Ohio 44117-1199 U.S.A. M27517PRINT
A.04
1 AD2458-1 EXHAUST HOOD, PRISM 6.5FT X 7.5FT 78 90 73.6 69.1 85.6 81.1 1 SINGLE 488 975 1463 180 2 AD2458-2 EXHAUST HOOD, PRISM 6.5FT X 6.5FT 78 78 73.6 69.1 73.6 69.1 1 SINGLE 423 845 1268 170 3 AD2458-3 EXHAUST HOOD, PRISM 6.5FT X 11FT 78 132 73.6 69.1 127.6 123.1 2 DOUBLE 715 1430 2145 256 4 AD2458-4 EXHAUST HOOD, PRISM 6.5FT X 12FT 78 144 73.6 69.1 139.6 135.1 2 DOUBLE 780 1560 2340 268 5 AD2458-5 EXHAUST HOOD, PRISM 6.5FT X 13FT 78 156 73.6 69.1 151.6 147.1 2 DOUBLE 845 1690 2535 280 6 AD2458-6 EXHAUST HOOD, PRISM 6.5FT X 15.5FT 78 186 73.6 69.1 181.6 177.1 2 TRIPLE 1008 2015 3023 334 7 AD2458-7 EXHAUST HOOD, PRISM 6.5FT X 16.5FT 78 198 73.6 69.1 193.6 189.1 2 TRIPLE 1073 2145 3218 344 8 AD2458-8 EXHAUST HOOD, PRISM 6.5FT X 17.5FT 78 210 73.6 69.1 205.6 201.1 2 TRIPLE 1138 2275 3413 360 9 AD2458-9 EXHAUST HOOD, PRISM 6.5FT X 18.5FT 78 222 73.6 69.1 217.6 213.1 2 TRIPLE 1203 2405 3608 370
10 AD2458-10 EXHAUST HOOD, PRISM 6.5FT X 20FT 78 240 73.6 69.1 235.6 231.1 2 QUADRAPLE 1300 2600 3900 410 11 AD2458-11 EXHAUST HOOD, PRISM 7.5FT X 7.5FT 90 90 85.6 81.1 85.6 81.1 1 SINGLE 563 1125 1688 195 12 AD2458-12 EXHAUST HOOD, PRISM 7.5FT X 11FT 90 132 85.6 81.1 127.6 123.1 2 DOUBLE 825 1650 2475 275 13 AD2458-13 EXHAUST HOOD, PRISM 7.5FT X 12FT 90 144 85.6 81.1 139.6 135.1 2 DOUBLE 900 1800 2700 290 14 AD2458-14 EXHAUST HOOD, PRISM 7.5FT X 13FT 90 156 85.6 81.1 151.6 147.1 2 DOUBLE 975 1950 2925 300 15 AD2458-15 EXHAUST HOOD, PRISM 7.5FT X 15.5FT 90 186 85.6 81.1 181.6 177.1 2 TRIPLE 1163 2325 3488 360 16 AD2458-16 EXHAUST HOOD, PRISM 7.5FT X 16.5FT 90 198 85.6 81.1 193.6 189.1 2 TRIPLE 1238 2475 3713 370 17 AD2458-17 EXHAUST HOOD, PRISM 7.5FT X 18.5FT 90 222 85.6 81.1 217.6 213.1 2 TRIPLE 1388 2775 4163 405 18 AD2458-18 EXHAUST HOOD, PRISM 7.5FT X 20FT 90 240 85.6 81.1 235.6 231.1 2 QUADRAPLE 1500 3000 4500 440 19 AD2458-37 EXHAUST HOOD, PRISM 6.5FT X 5.5FT; SMR 78 66 73.6 69.1 61.6 57.1 1 SINGLE 358 715 1073 175 20 AD2458-38 EXHAUST HOOD, PRISM 7.5FT X 5.5FT; SMR 90 66 85.6 81.1 61.6 57.1 1 SINGLE 413 825 1238 195 21 AD2458-39 EXHAUST HOOD, PRISM 6.5FT X 9FT; SMR 78 108 73.6 69.1 103.6 99.1 1 DOUBLE 585 1170 1755 245 22 AD2458-40 EXHAUST HOOD, PRISM 7.5FT X 9FT; SMR 90 108 85.6 81.1 103.6 99.1 1 DOUBLE 675 1350 2025 270 23 AD2458-41 EXHAUST HOOD, PRISM 6.5FT X 10FT; SMR 78 120 73.6 69.1 115.6 111.1 2 DOUBLE 650 1300 1950 270 24 AD2458-42 EXHAUST HOOD, PRISM 7.5FT X 10FT; SMR 90 120 85.6 81.1 115.6 111.1 2 DOUBLE 750 1500 2250 300 25 AD2458-43 EXHAUST HOOD, PRISM 6.5FT X 14FT; SMR 78 168 73.6 69.1 163.6 159.1 2 DOUBLE 910 1820 2730 370 26 AD2458-44 EXHAUST HOOD, PRISM 7.5FT X 14FT; SMR 90 168 85.6 81.1 163.6 159.1 2 DOUBLE 1050 2100 3150 385 27 AD2458-45 EXHAUST HOOD, PRISM 6.5FT X 8.5FT; SMR 78 102 73.6 69.1 97.6 93.1 2 DOUBLE 553 1105 1658 235 28 AD2458-46 EXHAUST HOOD, PRISM 7.5FT X 8.5FT; SMR 90 102 85.6 81.1 97.6 93.1 2 DOUBLE 638 1275 1913 255
SL.
NO
WEIGHT
(LBS)
PART
NUMBER DESCRIPTION
NUMBER
OF
OUTLETS
Air Flow (CFM)
A (IN) B (IN) C (IN) D (IN) E (IN) F (IN) ROOF
PANELS
1 AIR
CHANGES
PER MINUTE
2 AIR
CHANGES
PER MINUTE
3 AIR
CHANGES
PER MINUTE

A-6
INSTALLATION
PRISM®EXHAUST HOOD
THE LINCOLN ELECTRIC COMPANY
World's Leader in Welding and Cutting Products
Sales and Service through Subsidiaries and Distributors Worldwide
Cleveland, Ohio 44117-1199 U.S.A. M27517PRINT
A.04
TRIPLE OUTLET ROOF PANEL
DOUBLE OUTLET ROOF PANEL
QUADRAPLE OUTLET ROOF PANEL
NOTES: NA. ALL DIMENSIONS MENTIONED IN THIS DATA SHEET ARE APPROXIMATE
AND INDICATIVE, ACTUAL PHYSICAL ASSEMBLY DIMENSIONS MAY VARY
AND SUBJECT TO CHANGE BASED ON MANUFACTURING DRAWINGS.
NB. EVERY OUTLET ROOF PANELS HAS TO BE MOUNTED TO THE CENTER
OF THE CORRESPONDING OUTER FRAME. EMBOSS IS PROVIDED AT THE CENTER OF THE FRAME FOR EASY IDENTIFICATION
54.0 (54.0) 54.0
54.2 59.8
66.0 NB
NB
NB
NB
NB
NB
NB
NB
NB
66.0
67.5

A-7
INSTALLATION
PRISM®EXHAUST HOOD
THE LINCOLN ELECTRIC COMPANY
World's Leader in Welding and Cutting Products
Sales and Service through Subsidiaries and Distributors Worldwide
Cleveland, Ohio 44117-1199 U.S.A. M27517PRINT
A.04
25.5 25.5
73.4 73.4
25.5
25.5
25.5 25.5
73.4 73.4
25.7
DOUBLE OUTLET ROOF PANEL EYEBOLT AT 4 LOCATIONS AS SHOWN TRIPLE OUTLET ROOF PANEL
EYEBOLT AT 6 LOCATIONS AS SHOWN
QUADRAPLE OUTLET ROOF PANEL EYEBOLT AT 8 LOCATIONS AS SHOWN
SINGLE OUTLET ROOF PANEL EYEBOLT AT 4 LOCATIONS AS SHOWN
HOOD HUNG FROM THE CEILING - EYE BOLT LOCATIONS
25.5 25.5
73.4
25.5 25.5
73.4
25.5 25.5
MIDDLE OF THE CETER FRAME
25.3
73.4
73.4
25.5
25.5
106.5 106.5
106.5 106.5
NOTES: NA. EMBOSSING AT SHOWN LOCATIONS NEED TO BE DRILLED OUT TO MOUNT THE GUSSETS & EYEBOLT. NB. FOR MOUNTING DETAILS REFER INSTALLATION PAGE.
NA NA
NA NA
NA
MIDDLE OF THE CETER FRAME
NA NA
NA NA NA NA

A-8
INSTALLATION
PRISM®EXHAUST HOOD
THE LINCOLN ELECTRIC COMPANY
World's Leader in Welding and Cutting Products
Sales and Service through Subsidiaries and Distributors Worldwide
Cleveland, Ohio 44117-1199 U.S.A. M27517PRINT
A.04
FOR THE HOODS MOUNTED ON THE EXISTING CELL USING RISER/STRUTS
NOTES: NA. L1 - INNER DIMENSION BETWEEN THE TWO OPPOSITE SIDE STRUTS NB. L2 - OUTER DIMENSION BETWEEN THE TWO OPPOSITE SIDE STRUTS NC. MEASURE L1 & L2 DIMENSION & ENSURE IT FALLS BETWEEN
C, D, E & F DIMENSIONS OF THE RESPECTIVE HOOD SIZE FROM THE CHART.
WEIGHT DETAILS OF PRISM EXHAUST HOOD WITH SHEET METAL ROOF PANELS (AD2458-19 TO AD2458-46)
SL.
NO
PART
NUMBER DESCRIPTION WEIGHT
(LBS)
1 AD2458-19 EXHAUST HOOD, PRISM 6.5FT X 7.5FT; SMR 215
2 AD2458-20 EXHAUST HOOD, PRISM 6.5FT X 6.5FT; SMR 195
3 AD2458-21 EXHAUST HOOD, PRISM 6.5FT X 11FT; SMR 300
4 AD2458-22 EXHAUST HOOD, PRISM 6.5FT X 12FT; SMR 320
5 AD2458-23 EXHAUST HOOD, PRISM 6.5FT X 13FT; SMR 335
6 AD2458-24 EXHAUST HOOD, PRISM 6.5FT X 15.5FT; SMR 400
7 AD2458-25 EXHAUST HOOD, PRISM 6.5FT X 16.5FT; SMR 415
8 AD2458-26 EXHAUST HOOD, PRISM 6.5FT X 17.5FT; SMR 430
9 AD2458-27 EXHAUST HOOD, PRISM 6.5FT X 18.5FT; SMR 450
10 AD2458-28 EXHAUST HOOD, PRISM 6.5FT X 20FT; SMR 490 11 AD2458-29 EXHAUST HOOD, PRISM 7.5FT X 7.5FT; SMR 235 12 AD2458-30 EXHAUST HOOD, PRISM 7.5FT X 11FT; SMR 330 13 AD2458-31 EXHAUST HOOD, PRISM 7.5FT X 12FT; SMR 350 14 AD2458-32 EXHAUST HOOD, PRISM 7.5FT X 13FT; SMR 370 15 AD2458-33 EXHAUST HOOD, PRISM 7.5FT X 15.5FT; SMR 435 16 AD2458-34 EXHAUST HOOD, PRISM 7.5FT X 16.5FT; SMR 455 17 AD2458-35 EXHAUST HOOD, PRISM 7.5FT X 18.5FT; SMR 505 18 AD2458-36 EXHAUST HOOD, PRISM 7.5FT X 20FT; SMR 540 19 AD2458-37 EXHAUST HOOD, PRISM 6.5FT X 5.5FT; SMR 175 20 AD2458-38 EXHAUST HOOD, PRISM 7.5FT X 5.5FT; SMR 195 21 AD2458-39 EXHAUST HOOD, PRISM 6.5FT X 9FT; SMR 245 22 AD2458-40 EXHAUST HOOD, PRISM 7.5FT X 9FT; SMR 270 23 AD2458-41 EXHAUST HOOD, PRISM 6.5FT X 10FT; SMR 270 24 AD2458-42 EXHAUST HOOD, PRISM 7.5FT X 10FT; SMR 300 25 AD2458-43 EXHAUST HOOD, PRISM 6.5FT X 14FT; SMR 370 26 AD2458-44 EXHAUST HOOD, PRISM 7.5FT X 14FT; SMR 385 27 AD2458-45 EXHAUST HOOD, PRISM 6.5FT X 8.5FT; SMR 235 28 AD2458-46 EXHAUST HOOD, PRISM 7.5FT X 8.5FT; SMR 255
L1 L2
DIM C, DIM E
DIM D, DIM F

A-9
INSTALLATION
PRISM®EXHAUST HOOD
THE LINCOLN ELECTRIC COMPANY
World's Leader in Welding and Cutting Products
Sales and Service through Subsidiaries and Distributors Worldwide
Cleveland, Ohio 44117-1199 U.S.A. M27517PRINT
A.04
NOTES: NA. HOOD LENGTH FROM 6.5FT TO 16.5 FT ARE MOUNTED USING 4 LEGS AT CORNERS NB. LARGER HOOD FROM 16.5FT TO 20FT ARE MOUNTED USING LEGS OFFSET FROM
THE CORNERS (L1) AS PER THE REQUIREMENT.
NC. BRACKETS ARE INCLUDED IN THE LEG KITS FOR BOTH MOUNTING OPTIONS. ND. REFER INSTALLATION PAGE FOR MORE DETAILS. NF. FOR HOODS MOUNTING SIDE BY SIDE; LEGS ARE PROVIDED AT THE MIDDLE
ON EACH END.
SL. NO DESCRIPTION
HOOD
WIDTH
(IN)
HOOD
LENGTH
(IN)
NUMBER OF LEGS
1 EXHAUST HOOD, PRISM 6.5FT X 7.5FT 78 90 4 2 EXHAUST HOOD, PRISM 6.5FT X 6.5FT 78 78 4 3 EXHAUST HOOD, PRISM 6.5FT X 11FT 78 132 4 4 EXHAUST HOOD, PRISM 6.5FT X 12FT 78 144 4 5 EXHAUST HOOD, PRISM 6.5FT X 13FT 78 156 4 6 EXHAUST HOOD, PRISM 6.5FT X 15.5FT 78 186 4 7 EXHAUST HOOD, PRISM 6.5FT X 16.5FT 78 198 4 8 EXHAUST HOOD, PRISM 7.5FT X 7.5FT 90 90 4 9 EXHAUST HOOD, PRISM 7.5FT X 11FT 90 132 4
10 EXHAUST HOOD, PRISM 7.5FT X 12FT 90 144 4
11 EXHAUST HOOD, PRISM 7.5FT X 13FT 90 156 4
12 EXHAUST HOOD, PRISM 7.5FT X 15.5FT 90 186 4 13 EXHAUST HOOD, PRISM 7.5FT X 16.5FT 90 198 4 14 EXHAUST HOOD, PRISM 6.5FT X 5.5FT; SMR 78 66 4 15 EXHAUST HOOD, PRISM 7.5FT X 5.5FT; SMR 90 66 4 16 EXHAUST HOOD, PRISM 6.5FT X 9FT; SMR 78 108 4
17 EXHAUST HOOD, PRISM 7.5FT X 9FT; SMR 90 108 4
18 EXHAUST HOOD, PRISM 6.5FT X 10FT; SMR 78 120 4
19 EXHAUST HOOD, PRISM 7.5FT X 10FT; SMR 90 120 4
20 EXHAUST HOOD, PRISM 6.5FT X 14FT; SMR 78 168 4
21 EXHAUST HOOD, PRISM 7.5FT X 14FT; SMR 90 168 4
22 EXHAUST HOOD, PRISM 6.5FT X 8.5FT; SMR 78 102 4 23 EXHAUST HOOD, PRISM 7.5FT X 8.5FT; SMR 90 102 4
SL. NO DESCRIPTION
HOOD
WIDTH
(IN)
HOOD
LENGTH
(IN)
NUMBER OF LEGS
1 EXHAUST HOOD, PRISM 6.5FT X 17.5FT 78 210 4 2 EXHAUST HOOD, PRISM 6.5FT X 18.5FT 78 222 4 3 EXHAUST HOOD, PRISM 6.5FT X 20FT 78 240 4 4 EXHAUST HOOD, PRISM 7.5FT X 18.5FT 90 222 4 5 EXHAUST HOOD, PRISM 7.5FT X 20FT 90 240 4
FOR THE HOODS MOUNTED ON THE STANDALONE LEG KITS
2.2 2.2
HOOD LENGTH 6.5FT - 16.5FT HOOD LENGTH
17.5FT - 20FT
L1 L1
N.F.
HOOD 1 HOOD 2

A-10
INSTALLATION
TO MOUNT THE PRISM® EXHAUST HOOD
PROCEED AS FOLLOWS:
FIGURE – A.4
1. Slide the outer frames inside the connecting bracket and
secure it using 1/4" self drilling screws from top, bottom and
sides. See Figure A.4 above.
2. Connect all the outer frames with connecting brackets and
build the outer frame of the hood. See Figure A.5.
FIGURE – A.5
ROOF PANEL ASSEMBLY
3. Outlet roof panel has to be assembled to center of the outer
frame. Emboss is provided at the center of the frame for easy
identification. This remains same for all hoods regardless of
the size. Refer to the hood specifications sheet on Page A-1
for reference. See Figure A.6.
FIGURE – A.6
4. Secure Outlet Roof Panel with 1/4” self drilling screws Qty-6
from the hardware provided. See Figure A.7.
FIGURE – A.7
ATTENTION
For large hoods longer than 7.5 ft, it is not recommended
to build it complete on the floor and assemble. Always
preferred to mount on top of the cell using strut channels.
For the hood with leg kits, it is preferred to mount above
the leg extension or pallet stack of required height.
Pre-installed width section comes in two different sizes.
6.5 ft and 7.5 ft.
PRISM®EXHAUST HOOD
Duct collar
Duct Flange
Adapter plate
Square Baffle plate need to be assembled below the Outlet Roof
panel using the 100mm long M8 bolts Qty-4 and M8 Flange
nuts Qty-12. Spacing need to be adjusted as required. required.
Assemble the Outlet duct collar using the duct flange and self-
drilling screws provided along with the kit. Outlet have standard
16" diameter opening. For smaller sizes 8, 10 and 12 inch duct
collars; adapter plate need to be used.
5.
6.

A-11
INSTALLATION
ROOF PANEL ASSEMBLY: MULTI WALL
POLYCARBONATE
Film Removal and Taping
5. Apply the tape on top and bottom of the Multi wall
Polycarbonate panel to cover it from dust ingress
through the flutes. See Figure A.9.
FIGURE A.9
6. Assemble the Multi wall Polycarbonate sheet from top
of the flange. Align position correctly. Press the Multi
wall Polycarbonate on top, all around the perimeter to
compress it against the double sided tape adhesive.
See Figure A.10. FIGURE A.10
FIGURE A.12
ROOF PANEL ASSEMBLY: GALVANIZED SHEET
METAL
1. Assemble the outlet roof panel in the middle of the outer
frame as per the assembly instructions shown in the
previous page. Assemble the galvanized panels as shown
in Figure A.11.
2. Cut the edge trim (provided in the hardware kit) to the
required size and press and lock it on the mating edges of
the two galvanized panels. This will ensure the sealing
between the galvanized panels. See Figure A.12.
3. Secure using #10 self drilling screws from all sides as
shown in Figure A.13.
FIGURE A.13
FIGURE A.11
1. Adjust the length (if needed) using a Jig saw.
Polycarbonate sheets and panels can be cut with fine-
toothed (8-12 teeth/inch) circular, jig, table, or band saw.
Blades should be certified for plastic cutting. To reduce
vibration, polycarbonate panels should be clamped when
cutting.
2. Remove the polyethylene film from the bottom (Non-UV
side) of the polycarbonate sheet.
3. Peel the UV protected side (printed side) back 3-4 inches
from each side. This side should be down facing the
weld cell. Mark the UV side to avoid confusion.
4. Peel off the backing of double-sided tape around the top
flange of the frame. See Figure A.8.
FIGURE – A.8
PRISM®EXHAUST HOOD

A-12
INSTALLATION
MOUNTING THE HOOD SIDE BY SIDE FOR
DUAL AND TRIPLE HOOD
FIGURE – A.16
5. Curtain brackets are used to connect the curtains between
the two hoods. It acts as a bridge between the hoods for
curtain mounting.
6. Mount the bracket to bottom face of the hood, one on each
sides using 1/4" self drilling screws. See Figure A.17.
Curtain Bracket
FIGURE – A.15
FIGURE – A.14
Emboss
PRISM®EXHAUST HOOD
1. Remove all self drilling screws from the side butting faces of
the hood. Align both hoods, make sure both hood frames are
precisely square (90 degrees). See Figure A.14.
2. Drill out the alternate embosses from top face of both the
hoods using 3/8" drill bit.
3. Mounting brackets to be installed alternately from either side
as shown using M8 Bolt and Flange nut.
4. Fasten hoods together using 1/4" self drilling screws on each
bracket as shown.