Lincoln Electric IM348 User Manual

AC-225-GLM

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WELDING POWER SOURCE

by

IM347

April, 1998

LINCOLN

ELECTRIC

®

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.

Contents Page

Safety Precautions ...............................................................................................2

Installation and Operating Instructions

for AC-225-GLM Dual Voltage Type (K1327)............................................7

Includes safety, installation, operating instructions
and parts lists.

Learning to Weld .................................................................................................9

Using the Carbon Arc Torch..............................................................................17

Includes for heating metal, welding aluminum or
brazing with an arc torch.

Selecting Electrodes ..........................................................................................19

Welding Books and Teaching Aids ...................................................................23

Cleveland, Ohio 44117-1199 U.S.A. TEL: [phone] FAX: [phone] WEB SITE: www.lincolnelectric.com

World's Leader in Welding and Cutting Products Premier Manufacturer of Industrial Motors

• Sales and Service through Subsidiaries and Distributors Worldwide •

SAFETY

WARNING

CALIFORNIA PROPOSITION 65 WARNINGS

Diesel engine exhaust and some of its constituents
are known to the State of California to cause can­cer, birth defects, and other reproductive harm.

The Above For Diesel Engines

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 W117.2-1974. 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.

The engine exhaust from this product contains
chemicals known to the State of California to cause
cancer, birth defects, or other reproductive harm.

The Above For Gasoline Engines

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 flame 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 filling 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.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.

___________________________________________________

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.

2.d.4. Connect the work cable to the workpiece as close as
possible to the area being welded.

2.d.5. Do not work next to welding power source.

Mar ‘95

– 2 –

SAFETY

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 Items 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 with electrodes which require special
ventilation such as stainless or hard facing (see
instructions on container or MSDS) or on lead or
cadmium plated steel and other metals or coatings
which produce highly toxic fumes, keep exposure as
low as possible and below Threshold Limit Values (TLV)
using local exhaust or mechanical ventilation. In
confined spaces or in some circumstances, outdoors, a
respirator may be required. Additional precautions are
also required when welding on galvanized steel.

5.b.

Do not weld in locations near chlorinated hydrocarbon
coming from degreasing, cleaning or spraying operations.
The heat and rays of the arc can react with solvent vapors
form phosgene, a highly toxic gas, and other irritating
products.

5.c. 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.d. Read and understand the manufacturer’s instructions for this

equipment and the consumables to be used, including the
material safety data sheet (MSDS) and follow your
employer’s safety practices. MSDS forms are available from
your welding distributor or from the manufacturer.

vapors

to

5.e. Also see item 1.b.

– 3 –

Mar ‘95

SAFETY

WELDING 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.

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
been “cleaned”. For information, purchase “Recommended
Safe Practices for the
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.

Sparks and spatter are thrown from the welding arc. Wear oil

6.f.
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.

Remember that welding sparks and hot

though

they have

Preparation

for Welding and Cutting of

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
1235 Jefferson Davis Highway, Arlington, VA 22202.

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.

– 4 –

Mar ‘95

SAFETY

PRÉCAUTIONS DE SÛRETÉ

Pour

votre propre protection lire et observer toutes les instructions
et les précautions de sûreté specifiques qui parraissent dans ce
manuel aussi bien que les précautions de sûreté générales suiv­antes:

Sûreté Pour Soudage A L’Arc

1. Protegez-vous contre la secousse électrique:

a. Les circuits à l’électrode et à la piéce sont sous tension

quand la machine à souder est en marche. Eviter toujours
tout contact entre les parties sous tension et la peau nue
ou les vétements mouillés. Porter des gants secs et sans
trous pour isoler les mains.

b. Faire trés attention de bien s’isoler de la masse quand on

soude dans des endroits humides, ou sur un plancher met­allique ou des grilles metalliques, principalement dans
les positions assis ou couché pour lesquelles une grande
partie du corps peut être en contact avec la masse.

c. Maintenir le porte-électrode, la pince de masse, le câble de

soudage et la machine à souder en bon et sûr état defonc­tionnement.

d.Ne jamais plonger le porte-électrode dans l’eau pour le

refroidir.

e. Ne jamais toucher simultanément les parties sous tension

des porte-électrodes connectés à deux machines à souder
parce que la tension entre les deux pinces peut être le total
de la tension à vide des deux machines.

f. Si on utilise la machine à souder comme une source de

courant pour soudage semi-automatique, ces precautions
pour le porte-électrode s’applicuent aussi au pistolet de
soudage.

6. Eloigner les matériaux inflammables ou les recouvrir afin de
prévenir tout risque d’incendie dû aux étincelles.

7. Quand on ne soud
la masse. Un court-circuit accidental peut provoquer un
échauffement et un risque d’incendie.

8. S’assurer que la masse est connectée le plus prés possible de
la zone de travail qu’il est pratique de le faire. Si on place la
masse sur la charpente de la construction ou d’autres endroits
éloignés de la zone de travail, on augmente le risque de voir
passer le courant de soudage par les chaines de levage,
câbles de grue, ou autres circuits. Cela peut provoquer des
risques d’incendie ou d’echauffement des chaines et des
câbles jusqu’à ce qu’ils se rompent.

9. Assurer une ventilation suffisante dans la zone de soudage.
Ceci est particuliérement important pour le soudage de tôles
galvanisées plombées, ou cadmiées ou tout autre métal qui
produit des fumeés toxiques.

10. Ne pas souder en présence de vapeurs de chlore provenant
d’opérations de dégraissage, nettoyage ou pistolage. La
chaleur ou les rayons de l’arc peuvent réagir avec les vapeurs
du solvant pour produire du phosgéne (gas fortement toxique)
ou autres produits irritants.

11. Pour obtenir de plus amples renseignements sur la sûreté, voir
le code “Code for safety in welding and cutting” CSA Standard
W 117.2-1974.

e pas, poser la pince à une endroit isolé de

2. Dans le cas de travail au dessus du niveau du sol, se protéger
contre les chutes dans le cas ou on recoit un choc. Ne jamais
enrouler le câble-électrode autour de n’importe quelle partie du
corps.

3. Un coup d’arc peut être plus sévère qu’un coup de soliel, donc:

a. Utiliser un bon masque avec un verre filtrant approprié ainsi

qu’un verre blanc afin de se protéger les yeux du rayon­nement de l’arc et des projections quand on soude ou
quand on regarde l’arc.

b. Porter des vêtements convenables afin de protéger la peau

de soudeur et des aides contre le rayonnement de l‘arc.

c. Protéger l’autre personnel travaillant à proximité au

soudage à l’aide d’écrans appropriés et non-inflammables.

4. Des gouttes de laitier en fusion sont émises de l’arc de
soudage. Se protéger avec des vêtements de protection libres
de l’huile, tels que les gants en cuir, chemise épaisse, pan­talons sans revers, et chaussures montantes.

5. Toujours porter des lunettes de sécurité dans la zone de
soudage. Utiliser des lunettes avec écrans lateraux dans les
zones où l’on pique le laitier.

PRÉCAUTIONS DE SÛRETÉ POUR
LES MACHINES À SOUDER À
TRANSFORMATEUR ET À
REDRESSEUR

1. Relier à la terre le chassis du poste conformement au code de
l’électricité et aux recommendations du fabricant. Le dispositif
de montage ou la piece à souder doit être branché à une
bonne mise à la terre.

2. Autant que possible, I’installation et l’entretien du poste seront
effectués par un électricien qualifié.

3. Avant de faires des travaux à l’interieur de poste, la debranch­er à l’interrupteur à la boite de fusibles.

4. Garder tous les couvercles et dispositifs de sûreté à leur place.

Mar. ‘93

– 5 –

for selecting a QUALITY product by Lincoln Electric. We want you

Thank You

to take pride in operating this Lincoln Electric Company product •••
as much pride as we have in bringing this product to you!

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.

Please record your equipment identification information below for future reference. This information can be found
on your machine nameplate.

Model Name & Number _____________________________________

Code & Serial Number _____________________________________

Date of Purchase _____________________________________

Whenever you request replacement parts for or information on this equipment always supply the information you
have recorded above.

Read this Operators Manual completely before attempting to use this equipment. Save this manual and keep it
handy for quick reference. Pay particular attention to the safety instructions we have provided for your protection.
The level of seriousness to be applied to each is explained below:

WARNING

This statement appears where the information must be followed exactly to avoid serious personal injury or
loss of life.

CAUTION

This statement appears where the information must be followed to avoid minor personal injury or damage to
this equipment.

– 6 –

OPERATING INSTRUCTIONS

Input Power and Grounding Connections

Before starting the installation, check with the power com­pany to be sure your power supply is adequate for the volt­age, amperes, phase and frequency specified on the welder
nameplate. Also, be sure the planned installation will meet
the National Electrical Code and all local code require­ments. This welder may be operated from a single phase
line or from one phase of a two or three phase line.

This rated current of 140 amps will reduce the capability of
using larger electrodes and special techniques such as
punching holes due to the lower output current. Only elec­trodes and techniques up to the 140 amps rating can be used
with this reduced voltage input.

For supply lines, use three #10 or larger copper wires when
using conduit. If supply line run requirements exceed 100’,
#8 or larger wire will be needed to prevent excessive volt­age drops.

The unit is shipped with a five foot length input cable only.
No plug or receptacle is supplied from the factory.

Place the welder so there is free circulation of air in through
the louvers in the back and sides of the case and out of the
bottom on all four sides.

WARNING

These installation instructions apply to the input wiring
and overload protection installed to supply one AC-225­GLM and comply with the United States National
Electrical Code as it applies to electric welders. Other
equipment should not be connected to this supply with­out consulting the input power requirements for that
equipment, the United States National Electrical Code,
and all local codes.

WARNING

Only qualified personnel should make the input power
connections. Turn the input power off at the disconnect
switch before attempting to connect the input power
lines to the welder.

WARNING

Before attaching the electrode cable to the electrode
holder or the work cable to clamp, be certain the welder
is turned off or the input power is disconnected.

Attaching Electrode Cable to Holder

1. Loosen locking screw and slide handle off holder. Place
handle over electrode cable.

2. Remove insulation from electrode cable 1” ± 1/16” from
end.

3. Back out cable connecting screw until end is flush with
inside surface of jaw body.

4. Remove cable connecting clamp from holder jaws. Place
clamp over bare end of electrode cable and insert into
holder with clamp centered against connecting screw.

Using the following instructions, have a qualified electri­cian connect the unit to a fuse box or disconnect switch. For
60 Hz. operation use 50 Amp Superlag Fuses. For 50 Hz.
operation use 60 Amp Superlag Fuses. Fuse the two hot
lines of the circuit. A green wire in the input cable connects
to the frame of the welder and to a ground in the fuse box.
This insures proper grounding of the welder frame. If a sep­arate disconnect switch is used, it should have two poles for
the two hot lines and both should be fused as specified
above.

The dual voltage 50/60 Hz. AC-225-GLM is shipped from
the factory connected for the higher (230/220) nameplated
voltage. For use on the lower (115/110) voltage, remove the
welder top and side cover and reconnect and insulate the
leads at the power switch according to the wiring diagram
pasted inside the cover. Finally, replace the cover.

When connected to 1
power, the rated welding output is 140 amps.

15 volt 60 Hz. or 110 volt 50 Hz. input

5. Tighten cable connecting screw securely against clamp.

6. Slide handle into position and secure with locking screw.

When installing, turn the locking screw in until it is tight.
The threaded end of the screw will then press against the
inside of the handle and the head of the screw will be
completely inside the handle.

– 7 –

How To Use Parts List

1. Refer to the drawing below.

2. Find the part on the drawing.

3. Using the item number from the drawing find the part name and description in the table.

4. Get the welder code number found on the nameplate.

5. Order the part from The Lincoln Electric Company, or from a Lincoln Field Service Shop. Be sure to give the Parts
List number, item number, part name and description, number required, the welder name, model number and code
number.

18

17

16

1

18

P167-A
AC-225-GLM
Dual Voltage

2

3

4

5

6

7

8

15

9

10

14

Item Description

1 Back Case
2 Wrap Around
3 Front Case
4 Warning Decal
5 Nameplate
6 Range Selector Switch
7 Handle
8 Output Lead Clamp
9 Input Cable (230 V Input)

13

11

18

19

Item Description

10 Line Switch
11 Transformer and Base
13 Work Cable
14 Work Clamp
15 Electrode Holder
16 Electrode Cable
17 Fan Motor and Blade
18 Undercarriage Kit
19 Hand Shield (Optional)

– 8 –

Attaching Work Cable to Clamp

Duty Cycle

Insert work cable through strain relief hole in work clamp
and fasten securely with bolt and nut provided.

Electrode and Work Cable Replacement

Substitution of cables with larger sizes requiring connec­tions to be made internally is not recommended.
Connections for additional lengths or larger sizes should be
properly made externally. Lincoln Electric QD (Quick
Disconnect) connectors are available for this purpose.

If either cable requires replacement for other reasons, they
should be replaced with the appropriate Lincoln parts—
and only by qualified personnel.

Welding Current Selection

Each position on the current selector switch is marked with
the output amperes for that setting. Turn the switch to the
current required for each application.

There is a slight amount of play in each switch position. It
is good practice to move the switch back and forth once
within this play after switching to a new position. This wip­ing action keeps the contacts free from dirt and oxides.

The welder is rated 18% duty cycle at 60 Hz on all switch
positions. This means that the arc can be drawn for 1.8 min­utes out of each ten minute period without any danger of
overheating. If the welder is used for more than 1.8 minutes
during several successive ten minute periods, it may over­heat and damage the windings. Be sure to leave the unit
“on” during each 10 minute period to let the fan motor run
for adequate cooling. Overheating reduces welder life.

WARNING—Pipe Thawing

The AC-225-GLM is not recommended for thawing or
heating of frozen pipes.

Electrode Selection Guide

See Chart on Welder and page 21.

Arc Torch (Optional Accessory)

The arc torch (see page 17) is especially suited for use on
these welders for brazing, welding non-ferrous metals and
preheating before bending and forming.

CAUTION: Do not turn the selector switch while welding
as this will damage the contacts.

MAINTENANCE

Routine preventative maintenance is not required. See your local Lincoln Electric Authorized Field Service Shop for
necessary repairs.

LEARNING TO WELD

The serviceability of a product or structure utilizing this type of information is and must
be the sole responsibility of the builder/user. Many variables beyond the control of The
Lincoln Electric Company affect the results obtained in applying this type of information.
These variables include, but are not limited to, welding procedure, plate chemistry and
temperature, weldment design, fabrication methods and service requirements.

No one can learn to weld simply by reading about it. Skill
comes only with practice. The following pages will help
the inexperienced welder to understand welding and
develop his skill. For more detailed information order
a copy of “New Lessons in Arc Welding” listed on page

23.

The Arc-Welding Circuit

The operator’s knowledge of arc welding must go beyond
the arc itself. He must know how to control the arc, and this
requires a knowledge of the welding circuit and the equip­ment that provides the electric current used in the arc.

– 9 –