Thank you and congratulations on choosing Miller. Now you can get
the job done and get it done right. We know you don’t have time to do
it any other way.
That’s why when Niels Miller first started building arc welders in 1929,
he made sure his products offered long-lasting value and superior
quality. Like you, his customers couldn’t afford anything less. Miller
products had to be more than the best they could be. They had to be the
best you could buy.
Today, the people that build and sell Miller products continue the
tradition. They’re just as committed to providing equipment and service
that meets the high standards of quality and value established in 1929.
This Owner’s Manual is designed to help you get the most out of your
Miller products. Please take time to read the Safety precautions. They
will help you protect yourself against potential hazards on the worksite.
We’ve made installation and operation quick
and easy. With Miller you can count on years
of reliable service with proper maintenance.
And if for some reason the unit needs repair,
there’s a Troubleshooting section that will
help you figure out what the problem is. The
Miller is the first welding
equipment manufacturer in
the U.S.A. to be registered to
the ISO 9001:2000 Quality
System Standard.
parts list will then help you to decide the
exact part you may need to fix the problem.
Warranty and service information for your
particular model are also provided.
Working as hard as you do
− every power source from
Miller is backed by the most
hassle-free warranty in the
business.
Miller Electric manufactures a full line
of welders and welding related equipment.
For information on other quality Miller
products, contact your local Miller distributor to receive the latest full
line catalog or individual catalog sheets. To locate your nearest
distributor or service agency call 1-800-4-A-Miller, or visit us at
www.MillerWelds.com on the web.
SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING
1-1.Symbol Usage
Means Warning! Watch Out! There are possible hazards
with this procedure! The possible hazards are shown in
the adjoining symbols.
som _8/03
Y Marks a special safety message.
. Means “Note”; not safety related.
1-2.Arc Welding Hazards
Y The symbols shown below are used throughout this manual to
call attention to and identify possible hazards. When you see
the symbol, watch out, and follow the related instructions to
avoid the hazard. The safety information given below is only
a summary of the more complete safety information found in
the Safety Standards listed in Section 1-5. Read and follow all
Safety Standards.
Y Only qualified persons should install, operate, maintain, and
repair this unit.
Y During operation, keep everybody, especially children, away.
ELECTRIC SHOCK can kill.
Touching live electrical parts can cause fatal shocks
or severe burns. The electrode and work circuit is
electrically live whenever the output is on. The input
live when power is on. In semiautomatic or automatic wire welding, the
wire, wire reel, drive roll housing, and all metal parts touching the
welding wire are electrically live. Incorrectly installed or improperly
grounded equipment is a hazard.
D Do not touch live electrical parts.
D Wear dry, hole-free insulating gloves and body protection.
D Insulate yourself from work and ground using dry insulating mats
or covers big enough to prevent any physical contact with the work
or ground.
D Do not use AC output in damp areas, if movement is confined, or if
there is a danger of falling.
D Use AC output ONLY if required for the welding process.
D If AC output is required, use remote output control if present on
unit.
D Disconnect input power or stop engine before installing or
servicing this equipment. Lockout/tagout input power according to
OSHA 29 CFR 1910.147 (see Safety Standards).
D Properly install and ground this equipment according to its
Owner’s Manual and national, state, and local codes.
D Always verify the supply ground − check and be sure that input
power cord ground wire is properly connected to ground terminal in
disconnect box or that cord plug is connected to a properly
grounded receptacle outlet.
D When making input connections, attach proper grounding conduc-
tor first − double-check connections.
D Frequently inspect input power cord for damage or bare wiring −
replace cord immediately if damaged − bare wiring can kill.
D Turn off all equipment when not in use.
D Do not use worn, damaged, undersized, or poorly spliced cables.
D Do not drape cables over your body.
power circuit and machine internal circuits are also
This group of symbols means Warning! Watch Out! possible
ELECTRIC SHOCK, MOVING PARTS, and HOT PARTS hazards.
Consult symbols and related instructions below for necessary actions
to avoid the hazards.
D If earth grounding of the workpiece is required, ground it directly
with a separate cable.
D Do not touch electrode if you are in contact with the work, ground,
or another electrode from a different machine.
D Use only well-maintained equipment. Repair or replace damaged
parts at once. Maintain unit according to manual.
D Wear a safety harness if working above floor level.
D Keep all panels and covers securely in place.
D Clamp work cable with good metal-to-metal contact to workpiece
or worktable as near the weld as practical.
D Insulate work clamp when not connected to workpiece to prevent
contact with any metal object.
D Do not connect more than one electrode or work cable to any
single weld output terminal.
SIGNIFICANT DC VOLTAGE exists after removal of
input power on inverters.
D Turn Off inverter, disconnect input power, and discharge input
capacitors according to instructions in Maintenance Section
before touching any parts.
FUMES AND GASES can be hazardous.
Welding produces fumes and gases. Breathing
these fumes and gases can be hazardous to your
health.
D Keep your head out of the fumes. Do not breathe the fumes.
D If inside, ventilate the area and/or use exhaust at the arc to remove
welding fumes and gases.
D If ventilation is poor, use an approved air-supplied respirator.
D Read the Material Safety Data Sheets (MSDSs) and the
manufacturer’s instructions for metals, consumables, coatings,
cleaners, and degreasers.
D Work in a confined space only if it is well ventilated, or while
wearing an air-supplied respirator. Always have a trained watchperson nearby. Welding fumes and gases can displace air and
lower the oxygen level causing injury or death. Be sure the breathing air is safe.
D Do not weld in locations near degreasing, cleaning, or spraying op-
erations. The heat and rays of the arc can react with vapors to form
highly toxic and irritating gases.
D Do not weld on coated metals, such as galvanized, lead, or
cadmium plated steel, unless the coating is removed from the weld
area, the area is well ventilated, and if necessary, while wearing an
air-supplied respirator. The coatings and any metals containing
these elements can give off toxic fumes if welded.
OM-319 Page 1
Page 6
ARC RAYS can burn eyes and skin.
BUILDUP OF GAS can injure or kill.
Arc rays from the welding process produce intense
visible and invisible (ultraviolet and infrared) rays
that can burn eyes and skin. Sparks fly off from the
weld.
D Wear a welding helmet fitted with a proper shade of filter to protect
your face and eyes when welding or watching (see ANSI Z49.1
and Z87.1 listed in Safety Standards).
D Wear approved safety glasses with side shields under your
helmet.
D Use protective screens or barriers to protect others from flash and
glare; warn others not to watch the arc.
D Wear protective clothing made from durable, flame-resistant mate-
rial (leather and wool) and foot protection.
WELDING can cause fire or explosion.
Welding on closed containers, such as tanks,
drums, or pipes, can cause them to blow up. Sparks
can fly off from the welding arc. The flying sparks, hot
burns. Accidental contact of electrode to metal objects can cause
sparks, explosion, overheating, or fire. Check and be sure the area is
safe before doing any welding.
D Protect yourself and others from flying sparks and hot metal.
D Do not weld where flying sparks can strike flammable material.
D Remove all flammables within 35 ft (10.7 m) of the welding arc. If
this is not possible, tightly cover them with approved covers.
D Be alert that welding sparks and hot materials from welding can
easily go through small cracks and openings to adjacent areas.
D Watch for fire, and keep a fire extinguisher nearby.
D Be aware that welding on a ceiling, floor, bulkhead, or partition can
cause fire on the hidden side.
D Do not weld on closed containers such as tanks, drums, or pipes,
unless they are properly prepared according to AWS F4.1 (see
Safety Standards).
D Connect work cable to the work as close to the welding area as
practical to prevent welding current from traveling long, possibly
unknown paths and causing electric shock and fire hazards.
D Do not use welder to thaw frozen pipes.
D Remove stick electrode from holder or cut off welding wire at
contact tip when not in use.
D Wear oil-free protective garments such as leather gloves, heavy
shirt, cuffless trousers, high shoes, and a cap.
D Remove any combustibles, such as a butane lighter or matches,
from your person before doing any welding.
workpiece, and hot equipment can cause fires and
FLYING METAL can injure eyes.
D Welding, chipping, wire brushing, and grinding
cause sparks and flying metal. As welds cool,
they can throw off slag.
D Wear approved safety glasses with side
shields even under your welding helmet.
D Shut off shielding gas supply when not in use.
D Always ventilate confined spaces or use
approved air-supplied respirator.
HOT PARTS can cause severe burns.
D Do not touch hot parts bare handed.
D Allow cooling period before working on gun or
torch.
MAGNETIC FIELDS can affect pacemakers.
D Pacemaker wearers keep away.
D Wearers should consult their doctor before
going near arc welding, gouging, or spot
welding operations.
NOISE can damage hearing.
Noise from some processes or equipment can
damage hearing.
D Wear approved ear protection if noise level is
high.
CYLINDERS can explode if damaged.
Shielding gas cylinders contain gas under high
pressure. If damaged, a cylinder can explode. Since
gas cylinders are normally part of the welding
process, be sure to treat them carefully.
D Protect compressed gas cylinders from excessive heat, mechani-
cal shocks, slag, open flames, sparks, and arcs.
D Install cylinders in an upright position by securing to a stationary
support or cylinder rack to prevent falling or tipping.
D Keep cylinders away from any welding or other electrical circuits.
D Never drape a welding torch over a gas cylinder.
D Never allow a welding electrode to touch any cylinder.
D Never weld on a pressurized cylinder − explosion will result.
D Use only correct shielding gas cylinders, regulators, hoses, and fit-
tings designed for the specific application; maintain them and
associated parts in good condition.
D Turn face away from valve outlet when opening cylinder valve.
D Keep protective cap in place over valve except when cylinder is in
use or connected for use.
D Read and follow instructions on compressed gas cylinders,
associated equipment, and CGA publication P-1 listed in Safety
Standards.
OM-319 Page 2
Page 7
1-3.Additional Symbols For Installation, Operation, And Maintenance
FIRE OR EXPLOSION hazard.
D Do not install or place unit on, over, or near
combustible surfaces.
D Do not install unit near flammables.
D Do not overload building wiring − be sure power supply system is
properly sized, rated, and protected to handle this unit.
FALLING UNIT can cause injury.
D Use lifting eye to lift unit only, NOT running
gear, gas cylinders, or any other accessories.
D Use equipment of adequate capacity to lift and
support unit.
D If using lift forks to move unit, be sure forks are
long enough to extend beyond opposite side of
unit.
OVERUSE can cause OVERHEATING
D Allow cooling period; follow rated duty cycle.
D Reduce current or reduce duty cycle before
starting to weld again.
D Do not block or filter airflow to unit.
STATIC (ESD) can damage PC boards.
MOVING PARTS can cause injury.
D Keep away from moving parts such as fans.
D Keep all doors, panels, covers, and guards
closed and securely in place.
H.F. RADIATION can cause interference.
D High-frequency (H.F.) can interfere with radio
navigation, safety services, computers, and
communications equipment.
D Have only qualified persons familiar with
electronic equipment perform this installation.
D The user is responsible for having a qualified electrician prompt-
ly correct any interference problem resulting from the installation.
D If notified by the FCC about interference, stop using the
equipment at once.
D Have the installation regularly checked and maintained.
D Keep high-frequency source doors and panels tightly shut, keep
spark gaps at correct setting, and use grounding and shielding to
minimize the possibility of interference.
D Put on grounded wrist strap BEFORE handling
boards or parts.
D Use proper static-proof bags and boxes to
store, move, or ship PC boards.
MOVING PARTS can cause injury.
D Keep away from moving parts.
D Keep away from pinch points such as drive
rolls.
WELDING WIRE can cause injury.
D Do not press gun trigger until instructed to do
so.
D Do not point gun toward any part of the body,
other people, or any metal when threading
welding wire.
1-4.California Proposition 65 Warnings
Y Welding or cutting equipment 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 Section 25249.5 et seq.)
Y Battery posts, terminals and related accessories contain lead
and lead compounds, chemicals known to the State of
California to cause cancer and birth defects or other
reproductive harm. Wash hands after handling.
ARC WELDING can cause interference.
D Electromagnetic energy can interfere with
sensitive electronic equipment such as
computers and computer-driven equipment
such as robots.
D Be sure all equipment in the welding area is
electromagnetically compatible.
D To reduce possible interference, keep weld cables as short as
possible, close together, and down low, such as on the floor.
D Locate welding operation 100 meters from any sensitive elec-
tronic equipment.
D Be sure this welding machine is installed and grounded
according to this manual.
D If interference still occurs, the user must take extra measures
such as moving the welding machine, using shielded cables,
using line filters, or shielding the work area.
For Gasoline Engines:
Y Engine exhaust contains chemicals known to the State of
California to cause cancer, birth defects, or other reproductive
harm.
For Diesel Engines:
Y Diesel engine exhaust and some of its constituents are known
to the State of California to cause cancer, birth defects, and
other reproductive harm.
OM-319 Page 3
Page 8
1-5.Principal Safety Standards
Safety in Welding, Cutting, and Allied Processes, ANSI Standard Z49.1,
from American Welding Society, 550 N.W. LeJeune Rd, Miami FL 33126
(phone: 305-443-9353, website: www.aws.org).
Recommended Safe Practices for the Preparation for Welding and Cutting of Containers and Piping, American Welding Society Standard
AWS F4.1, from American Welding Society, 550 N.W. LeJeune Rd, Miami, FL 33126 (phone: 305-443-9353, website: www.aws.org).
National Electrical Code, NFPA Standard 70, from National Fire Protection Association, P.O. Box 9101, 1 Battery March Park, Quincy, MA
02269−9101 (phone: 617−770−3000, website: www.nfpa.org and www.
sparky.org).
Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1,
from Compressed Gas Association, 1735 Jefferson Davis Highway,
Suite 1004, Arlington, VA 22202−4102 (phone: 703−412−0900, website: www.cganet.com).
Code for Safety in Welding and Cutting, CSA Standard W117.2, from
Canadian Standards Association, Standards Sales, 178 Rexdale
1-6.EMF Information
Considerations About Welding And The Effects Of Low Frequency
Electric And Magnetic Fields
Welding current, as it flows through welding cables, will cause electromagnetic fields. There has been and still is some concern about such
fields. However, after examining more than 500 studies spanning 17
years of research, a special blue ribbon committee of the National
Research Council concluded that: “The body of evidence, in the
committee’s judgment, has not demonstrated that exposure to powerfrequency electric and magnetic fields is a human-health hazard.”
However, studies are still going forth and evidence continues to be
examined. Until the final conclusions of the research are reached, you
may wish to minimize your exposure to electromagnetic fields when
welding or cutting.
To reduce magnetic fields in the workplace, use the following
procedures:
Boulevard, Rexdale, Ontario, Canada M9W 1R3 (phone:
800−463−6727 or in Toronto 416−747−4044, website: www.csa−in-
ternational.org).
Practice For Occupational And Educational Eye And Face Protection,
ANSI Standard Z87.1, from American National Standards Institute, 11
West 42nd Street, New York, NY 10036−8002 (phone: 212−642−4900,
website: www.ansi.org).
Standard for Fire Prevention During Welding, Cutting, and Other Hot
Work, NFPA Standard 51B, from National Fire Protection Association,
P.O. Box 9101, 1 Battery March Park, Quincy, MA 02269−9101 (phone:
617−770−3000, website: www.nfpa.org and www. sparky.org).
OSHA, Occupational Safety and Health Standards for General Industry, Title 29, Code of Federal Regulations (CFR), Part 1910, Subpart Q,
and Part 1926, Subpart J, from U.S. Government Printing Office, Superintendent of Documents, P.O. Box 371954, Pittsburgh, PA 15250 (there
are 10 Regional Offices−−phone for Region 5, Chicago, is
312−353−2220, website: www.osha.gov).
1. Keep cables close together by twisting or taping them.
2. Arrange cables to one side and away from the operator.
3. Do not coil or drape cables around your body.
4. Keep welding power source and cables as far away from operator as practical.
5. Connect work clamp to workpiece as close to the weld as possible.
About Pacemakers:
Pacemaker wearers consult your doctor first. If cleared by your doctor,
then following the above procedures is recommended.
OM-319 Page 4
Page 9
SECTION 2 − CONSIGNES DE SÉCURITÉ − À LIRE AVANT
UTILISATION
som_fre 8/03
2-1.Signification des symboles
Signifie « Mise en garde. Faire preuve de vigilance. »
Cette procédure présente des risques identifiés par les
symboles adjacents aux directives.
Ce groupe de symboles signifie « Mise en garde. Faire preuve de vigi-
Y Identifie un message de sécurité particulier.
. Signifie « NOTA » ; n’est pas relatif à la sécurité.
2-2.Dangers relatifs au soudage à l’arc
lance. » Il y a des dangers liés aux CHOCS ÉLECTRIQUES, aux
PIÈCES EN MOUVEMENT et aux PIÈCES CHAUDES. Se reporter
aux symboles et aux directives ci-dessous afin de connaître les mesures à prendre pour éviter tout danger.
Y Les symboles ci-après sont utilisés tout au long du présent
manuel pour attirer l’attention sur les dangers potentiels et les
identifier. Lorsqu’on voit un symbole, faire preuve de vigilance et
suivre les directives mentionnées afin d’éviter tout danger. Les
consignes de sécurité énoncées ci-après ne font que résumer le
contenu des normes de sécurité mentionnées à la section 2-4.
Lire et respecter toutes ces normes.
Y L’installation, l’utilisation, l’entretien et les réparations ne doi-
vent être confiés qu’à des personnes qualifiées.
Y Pendant l’utilisation de l’appareil, tenir à l’écart toute personne,
en particulier les enfants.
LES DÉCHARGES ÉLECTRIQUES
peuvent être mortelles.
Un simple contact avec des pièces sous tension peut
causer une électrocution ou des blessures graves.
L’électrode et le circuit de soudage sont sous tension
d’entrée et les circuits internes de l’appareil sont également sous tension.
En soudage semi−automatique ou automatique, le fil, le dévidoir, le
logement des galets d’entraînement et les pièces métalliques en contact
avec le fil de soudage sont sous tension. Tout matériel mal installé ou mal
mis à la terre présente un danger.
D Ne jamais toucher aux pièces électriques sous tension.
D Porter des gants et des vêtements de protection secs et exempts de
trous.
D S’isoler de la pièce et de la terre au moyen de tapis ou autres disposi-
tifs isolants suffisamment grands pour empêcher tout contact
physique avec la pièce ou la terre.
D Ne pas se servir d’une source de courant alternatif dans les zones humi-
des, les endroits confinés ou là où on risque de tomber.
D Ne se servir d’une source de courant alternatif QUE si le procédé de souda-
ge l’exige.
D Si l’utilisation d’une source de courant alternatif s’avère nécessaire, se ser-
vir de la fonction de télécommande si l’appareil en est équipé.
D Couper l’alimentation ou arrêter le moteur avant de procéder à l’instal-
lation, à la réparation ou à l’entretien de l’appareil. Couper/étiqueter
l’alimentation selon la norme OSHA 29 CFR 1910.147 (voir les normes de sécurité).
D Installer et mettre à la terre correctement l’appareil conformément à
son manuel d’utilisation et aux codes nationaux, provinciaux et
municipaux.
D Toujours vérifier la terre du cordon d’alimentation − Vérifier et s’assu-
rer que le fil de terre du cordon d’alimentation est bien raccordé à la
borne de terre du sectionneur ou que la fiche du cordon est raccordée
à une prise correctement mise à la terre.
D Pour exécuter les branchements d’entrée, fixer d’abord le conducteur
de mise à la terre adéquat et contre−vérifier les connexions.
D Vérifier fréquemment le cordon d’alimentation et s’assurer qu’il n’est
ni endommagé ni dénudé ; le remplacer immédiatement s’il est endommagé − tout câble dénudé peut causer une électrocution.
D Mettre l’appareil hors tension quand on ne l’utilise pas.
D Ne pas utiliser de câbles usés, endommagés, de calibre insuffisant ou
mal épissés.
D Ne pas s’enrouler les câbles autour du corps.
D Si la pièce soudée doit être mise à la terre, le faire directement avec un
câble distinct.
D Ne pas toucher l’électrode quand on est en contact avec la pièce, la
terre ou une électrode d’une autre machine.
dès que l’appareil est en fonctionnement. Le circuit
D N’utiliser que du matériel en bon état. Réparer ou remplacer sur−le−
champ les pièces endommagées. Entretenir l’appareil conformément
au présent manuel.
D Porter un harnais de sécurité quand on travaille en hauteur.
D Maintenir solidement en place tous les panneaux et capots.
D Fixer le câble de retour de façon à obtenir un bon contact métal sur
métal avec la pièce à souder ou la table de travail, le plus près possible
de la soudure.
D Ne pas connecter plus d’une électrode ou plus d’un câble de masse à un
même terminal de sortie.
Il subsiste un COURANT CONTINU IMPORTANT
dans les convertisseurs après la suppression de
l’alimentation électrique.
D Arrêter les convertisseurs, débrancher le courant électrique et dé-
charger les condensateurs d’alimentation selon les instructions
énoncées à la section Entretien avant de toucher les pièces.
LES FUMÉES ET LES GAZ peuvent
être dangereux.
Le soudage génère des fumées et des gaz dont
l’inhalation peut être dangereuse pour la santé.
D Se tenir à distance des fumées et ne pas les inhaler.
D À l’intérieur, ventiler la zone et/ou utiliser un dispositif d’aspiration au
niveau de l’arc pour l’évacuation des fumées et des gaz de soudage.
D Si la ventilation est insuffisante, utiliser un respirateur à adduction
d’air agréé.
D Lire les fiches techniques de santé−sécurité (FTSS) et les instruc-
tions du fabricant concernant les métaux, les consommables, les
revêtements, les nettoyants et les dégraisseurs.
D Ne travailler dans un espace clos que s’il est bien ventilé ou porter un
respirateur à adduction d’air. Demander toujours à un surveillant dûment formé de se tenir à proximité. Des fumées et des gaz de soudage
peuvent se substituer à l’air, abaisser la teneur en oxygène et causer
des lésions ou des accidents mortels. S’assurer que l’air est respirable.
D Ne pas souder à proximité d’opérations de dégraissage, de nettoyage
ou de pulvérisation. La chaleur et les rayons de l’arc peuvent réagir en
présence de vapeurs et former des gaz hautement toxiques et irritants.
D Ne pas souder de métaux munis d’un revêtement, tels que la tôle
d’acier galvanisée, plombée ou cadmiée, à moins que le revêtement
n’ait été enlevé dans la zone de soudage, que l’endroit soit bien ventilé, et si nécessaire, porter un respirateur à adduction d’air. Les
revêtements et tous les métaux renfermant ces éléments peuvent dégager des fumées toxiques lorsqu’on les soude.
OM-319 Page 5
Page 10
LES RAYONS DE L’ARC peuvent causer des brûlures oculaires et cutanées.
Le rayonnement de l’arc génère des rayons visibles et
invisibles intenses (ultraviolets et infrarouges) susceptibles de causer des brûlures oculaires et cutanées.
Des étincelles sont projetées pendant le soudage.
D Porter un masque de soudage muni d’un filtre de la nuance adéquate
pour se protéger le visage et les yeux pendant le soudage ou pour regarder (voir les normes de sécurité ANSI Z49.1 et Z87.1).
D Porter des lunettes de sécurité à écrans latéraux sous le masque.
D Utiliser des écrans ou des barrières pour protéger les tiers de l’éclat
éblouissant ou aveuglant de l’arc ; leur demander de ne pas regarder
l’arc.
D Porter des vêtements de protection en matière durable et ignifuge
(cuir ou laine) et des chaussures de sécurité.
LE SOUDAGE peut causer un incendie ou une explosion.
Le soudage effectué sur des récipients fermés tels que
des réservoirs, des fûts ou des conduites peut causer
leur éclatement. Des étincelles peuvent être projetées
pièces chaudes et les équipements chauds peuvent causer des
incendies et des brûlures. Le contact accidentel de l’électrode avec tout
objet métallique peut causer des étincelles, une explosion, un surchauffement ou un incendie. Avant de commencer le soudage, vérifier et
s’assurer que l’endroit ne présente pas de danger.
D Se protéger et protéger les tiers de la projection d’étincelles et de mé-
tal chaud.
D Ne pas souder à un endroit où des étincelles peuvent tomber sur des
substances inflammables.
D Placer toutes les substances inflammables à une distance de 10,7 m
de l’arc de soudage. En cas d’impossibilité, les recouvrir soigneusement avec des protections agréées.
D Des étincelles et des matières en fusion peuvent facilement passer
même par des fissures et des ouvertures de petites dimensions.
D Surveiller tout déclenchement d’incendie et tenir un extincteur à proxi-
mité.
D Le soudage effectué sur un plafond, un plancher, une paroi ou une
cloison peut déclencher un incendie de l’autre côté.
D Ne pas souder des récipients fermés tels que des réservoirs, des fûts
ou des conduites, à moins qu’ils n’aient été préparés conformément à
l’AWS F4.1 (voir les normes de sécurité).
D Brancher le câble sur la pièce le plus près possible de la zone de sou-
dage pour éviter que le courant ne circule sur une longue distance, par
des chemins inconnus, et ne cause des risques d’électrocution et d’incendie.
D Ne pas utiliser le poste de soudage pour dégeler des conduites ge-
lées.
D En cas de non utilisation, enlever la baguette d’électrode du porte−
électrode ou couper le fil au raz du tube−contact.
D Porter des vêtements de protection exempts d’huile tels que des
gants en cuir, une chemise en tissu épais, des pantalons sans revers,
des chaussures montantes et un masque.
D Avant de souder, retirer tout produit combustible de ses poches, tel
qu’un briquet au butane ou des allumettes.
de l’arc de soudure. La projection d’étincelles, les
LES PARTICULES PROJETÉES peuvent blesser les yeux.
D Le soudage, le burinage, le passage de la pièce à
la brosse métallique et le meulage provoquent
ques. Pendant leur refroidissement, les soudures risquent de projeter du
laitier.
D Porter des lunettes de sécurité à écrans latéraux agréés, même sous le
masque de soudage.
l’émission d’étincelles et de particules métalli-
LES ACCUMULATIONS DE GAZ peuvent causer des blessures ou même
la mort.
D Couper l’alimentation en gaz protecteur en cas de
non utilisation.
D Veiller toujours à bien ventiler les espaces confinés ou porter un respira-
teur à adduction d’air agréé.
LES PIÈCES CHAUDES peuvent causer des brûlures graves.
D Ne pas toucher les pièces chaudes à main nue.
D Prévoir une période de refroidissement avant
d’utiliser le pistolet ou la torche.
LES CHAMPS MAGNÉTIQUES peuvent
perturber le fonctionnement des stimulateurs cardiaques.
D Les personnes qui portent un stimulateur cardiaque
doivent se tenir à distance.
D Ils doivent consulter leur médecin avant de s’appro-
cher d’un lieu où on exécute des opérations de soudage à l’arc, de gougeage ou de soudage par points.
LE BRUIT peut affecter l’ouïe.
Le bruit de certains processus et équipements peut
affecter l’ouïe.
D Porter des protecteurs d’oreille agréés si le niveau
sonore est trop élevé.
Les BOUTEILLES endommagées
peuvent exploser.
Les bouteilles de gaz protecteur contiennent du gaz
sous haute pression. Toute bouteille endommagée
peut exploser. Comme les bouteilles de gaz font
manipuler avec précaution.
D Protéger les bouteilles de gaz comprimé de la chaleur excessive, des
chocs mécaniques, du laitier, des flammes nues, des étincelles et des
arcs.
D Placer les bouteilles debout en les fixant dans un support stationnaire
ou dans un porte−bouteilles pour les empêcher de tomber ou de se
renverser.
D Tenir les bouteilles éloignées des circuits de soudage ou autres cir-
cuits électriques.
D Ne jamais poser une torche de soudage sur une bouteille de gaz.
D Ne jamais mettre une électrode de soudage en contact avec une bou-
teille de gaz.
D Ne jamais souder une bouteille contenant du gaz sous pression − elle
risquerait d’exploser.
D N’utiliser que les bouteilles de gaz protecteur, régulateurs, tuyaux et
raccords adéquats pour l’application envisagée ; les maintenir en bon
état, ainsi que les pièces connexes.
D Détourner la tête lorsqu’on ouvre la soupape d’une bouteille.
D Laisser le capuchon protecteur sur la soupape, sauf en cas d’utilisa-
tion ou de branchement de la bouteille
D Lire et suivre les instructions concernant les bouteilles de gaz compri-
mé, les équipements associés et les publications P−1 de la CGA,
mentionnées dans les normes de sécurité.
normalement partie du procédé de soudage, les
OM-319 Page 6
Page 11
2-3.Autres symboles relatifs à l’installation, au fonctionnement et à l’entretien de
l’appareil.
Risque D’INCENDIE OU D’EXPLOSION
D Ne pas placer l’appareil sur une surface inflam-
mable, ni au−dessus ou à proximité d’elle.
D Ne pas installer l’appareil à proximité de produits inflammables.
D Ne pas surcharger l’installation électrique − s’assurer que l’alimen-
tation est correctement dimensionnée et protégée avant de mettre
l’appareil en service.
LA CHUTE DE L’APPAREIL peut
blesser.
D N’utiliser que l’anneau de levage pour lever l’ap-
pareil. NE PAS utiliser le chariot, les bouteilles de
gaz ou tout autre accessoire.
D Utiliser un engin de capacité adéquate pour lever
D Si on utilise un chariot élévateur pour déplacer l’unité, s’assurer que
les fourches sont suffisamment longues pour dépasser du côté opposé de l’appareil.
l’appareil.
L’EMPLOI EXCESSIF peut FAIRE
SURCHAUFFER L’ÉQUIPEMENT.
D Prévoir une période de refroidissement ; respec-
ter le cycle opératoire nominal.
D Réduire le courant ou le cycle opératoire avant de
D Ne pas obstruer les orifices ou filtrer l’alimentation en air du poste.
reprendre le soudage.
LES ORGANES MOBILES peuvent
causer des blessures.
D Se tenir à l’écart des organes mobiles comme les
ventilateurs.
D Maintenir fermés et bien fixés les portes,
panneaux, recouvrements et dispositifs de
protection.
LE RAYONNEMENT HAUTE FRÉQUENCE (H. F.) risque de causer des
interférences.
D Le rayonnement haute fréquence peut causer
des interférences avec les équipements de radionavigation et de communication, les services de
sécurité et les ordinateurs.
D Ne demander qu’à des personnes qualifiées familiarisées avec les
équipements électroniques de faire fonctionner l’installation.
D L’utilisateur est tenu de faire corriger rapidement par un électricien
qualifié les interférences causées par l’installation.
D Si la Federal Communications Commission signale des interféren-
ces, arrêter immédiatement l’appareil.
D Faire régulièrement contrôler et entretenir l’installation.
D Maintenir soigneusement fermés les panneaux et les portes des sour-
ces de haute fréquence, maintenir le jeu d’éclatement au réglage
adéquat et utiliser une terre et un blindage pour réduire les interférences éventuelles.
LE SOUDAGE À L’ARC peut causer
des interférences.
LES CHARGES ÉLECTROSTATIQUES peuvent endommager les circuits imprimés.
D Mettre un bracelet antistatique AVANT de mani-
puler des cartes ou des pièces.
D Utiliser des pochettes et des boîtes antistatiques
pour stocker, déplacer ou expédier des cartes de
circuits imprimés.
LES PIÈCES MOBILES peuvent causer des blessures.
D Se tenir à l’écart des pièces mobiles.
D Se tenir à l’écart des points de coincement tels
que les dévidoirs.
LES FILS DE SOUDAGE peuvent causer des blessures.
D Ne pas appuyer sur la gâchette avant d’en avoir
reçu l’instruction.
D Ne pas diriger le pistolet vers soi, vers d’autres
personnes ou vers toute pièce mécanique en engageant le fil de soudage.
D L’énergie électromagnétique peut causer des
interférences avec l’équipement électronique
sensible tel que les ordinateurs et l’équipement
commandé par ordinateur tel que les robots.
D Veiller à ce que tout l’équipement de la zone de soudage soit compati-
ble au point de vue électromagnétique.
D Pour réduire la possibilité d’interférence, maintenir les câbles de sou-
dage aussi courts que possible, les grouper, et les poser aussi bas
que possible (par ex. : à terre).
D Veiller à souder à une distance de 100 mètres de tout équipement
électronique sensible.
D Veiller à ce que le poste de soudage soit posé et mis à la terre confor-
mément au présent manuel.
D En cas d’interférences après exécution des directives précédentes, il
incombe à l’utilisateur de prendre des mesures supplémentaires telles que le déplacement du poste, l’utilisation de câbles blindés,
l’utilisation de filtres de ligne ou la pose de protecteurs dans la zone de
travail.
LES CHAMPS MAGNÉTIQUES peuvent
affecter les stimulateurs cardiaques.
D Porteurs de stimulateur cardiaque, restez à dis-
tance.
D Les porteurs d’un stimulateur cardiaque doivent
d’abord consulter leur médecin avant de s’approcher des opérations de soudage à l’arc, de gougeage ou de soudage par points.
OM-319 Page 7
Page 12
2-4.Principales normes de sécurité
Safety in Welding, Cutting, and Allied Processes, norme ANSI Z49.1,
de l’American Welding Society, 550 N.W. LeJeune Rd, Miami FL 33126
(téléphone : (305) 443−9353, site Web : www.aws.org).
Recommended Safe Practices for the Preparation for Welding and Cutting of Containers and Piping, norme American Welding Society AWS
F4.1, de l’American Welding Society, 550 N.W. LeJeune Rd, Miami, FL
33126 (téléphone : (305) 443−9353, site Web : www.aws.org).
National Electrical Code, norme NFPA 70, de la National Fire Protection
Association, P.O. Box 9101, 1 Battery March Park, Quincy, MA
02269−9101 (téléphone : (617) 770−3000, sites Web : www.nfpa.org et
www.sparky.org).
Safe Handling of Compressed Gases in Cylinders, brochure CGA P−1,
de la Compressed Gas Association, 1735 Jefferson Davis Highway,
Suite 1004, Arlington, VA 22202−4102 (téléphone : (703) 412−0900,
site Web : www.cganet.com).
Code for Safety in Welding and Cutting, norme CSA W117.2, de la Canadian Standards Association, Standards Sales, 178 boulevard
Rexdale, Rexdale (Ontario) Canada M9W 1R3 (téléphone : (800)
463−6727 ou à Toronto : (416) 747−4044, site Web : www.csa−international.org).
Practice For Occupational And Educational Eye And Face Protection,
norme ANSI Z87.1, de l’American National Standards Institute, 11 West
42nd Street, New York, NY 10036−8002 (téléphone : (212) 642−4900,
site Web : www.ansi.org).
Standard for Fire Prevention During Welding, Cutting, and Other Hot
Work, norme NFPA 51B, de la National Fire Protection Association,
P.O. Box 9101, 1 Battery March Park, Quincy, MA 02269−9101 (téléphone : (617) 770−3000, site Web : www.nfpa.org et www.sparky.org).
OSHA, Occupational Safety and Health Standards for General Industry, Title 29, Code of Federal Regulations (CFR), Part 1910, Subpart Q,
and Part 1926, Subpart J, de l’U.S. Government Printing Office, Superintendent of Documents, P.O. Box 371954, Pittsburgh, PA 15250 (il y a
10 bureaux régionaux − Téléphone pour la Région 5, Chicago : (312)
353−2220, site Web : www.osha.gov).
2-5.Information sur les champs électromagnétiques
Données sur le soudage électrique et les effets des champs magnétiques basse fréquence sur l’organisme
En parcourant les câbles de soudage, le courant crée des champs électromagnétiques. Les effets potentiels de tels champs restent
préoccupants. Cependant, après avoir examiné plus de 500 études qui
ont été faites pendant une période de recherche de 17 ans, un comité
de spécialistes du National Research Council a conclu : « L’accumulation de preuves n’a pas démontré que l’exposition aux champs
magnétiques et aux champs électriques à haute fréquence constitue un
risque pour la santé humaine ». Toutefois, les études et l’examen des
preuves se poursuivent. En attendant les conclusions finales de la recherche, il serait souhaitable de réduire l’exposition aux champs
électromagnétiques pendant le soudage ou le coupage.
Afin de réduire les champs électromagnétiques en milieu de travail, respecter les consignes suivantes :
1. Garder les câbles ensemble en les torsadant ou en les fixant avec du
ruban adhésif.
2. Mettre tous les câbles du côté opposé à l’opérateur.
3. Ne pas s’enrouler les câbles autour du corps.
4. Garder le poste de soudage et les câbles le plus loin possible de soi.
5. Placer la pince de masse le plus près possible de la zone de soudage.
Consignes relatives aux stimulateurs cardiaques :
Les personnes qui portent un stimulateur cardiaque doivent avant tout
consulter leur médecin. Si ce dernier les déclare aptes, il leur est recommandé de respecter les consignes ci-dessus.
OM-319 Page 8
Page 13
SECTION 3 − INSTALLATION
ated
age
Rated
Amperage
Max
1−375 A
90
Di
3-1.Specifications
Amperes Input at AC Balanced Rated
Load Output; 60 Hz,
R
Welding Output
Three-Phase: NEMA
Class I (60) − 300
Amperes, 32 Volts
AC/DC, 60% Duty Cycle
Single-Phase: NEMA
Class I (60) − 200
Amperes, 28 Volts
AC/DC, 60% Duty Cycle
3-2.Dimensions And Weights
Single-Phase/Three-Phase
200 V230 V460 V575 V
4237181514.814
5144221810.29
KVAKW
Amper
Range
Max
OCV
A*
CA*35-1/2 in (910 mm)
B24 in (615 mm)
A
C22-3/4 in (583 mm)
*With lifting eye down
mensions
Weight
B
dim_1 3/96 - ST-800 402 / ST-117 264-C
351 lb (159 kg)
OM-319 Page 9
Page 14
3-3.Duty Cycle And Overheating
60% Duty Cycle:
At 200 Amperes With Single-Phase Input Power
At 300 Amperes With Three-Phase Input Power
Overheating
0
Minutes
Duty Cycle is percentage of 10 minutes that unit can weld at rated load
without overheating.
If unit overheats, thermostat(s)
opens, output stops, and cooling
fan runs. Wait fifteen minutes for
unit to cool. Reduce amperage or
voltage, or duty cycle before
welding.
Y Exceeding duty cycle can
damage unit and void warranty.
6 Minutes Welding4 Minutes Resting
A or V
15
OR
Reduce Duty Cycle
sduty1 5/95 / ST-136 510-B
3-4.Volt-Ampere Curves
A. DC Mode
B. AC Mode
The volt-ampere curves show the
minimum and maximum voltage
and amperage output capabilities of
the welding power source. Curves
of other settings fall between the
curves shown.
OM-319 Page 10
ssb1.1 10/91 − ST-168 007 / ST-168 006
Page 15
3-5.Selecting A Location
Movement
Location And Airflow
Tipping
Y Do not move or operate unit
where it could tip.
2
1 Rating Label
Use rating label to determine input
power needs.
2 Line Disconnect Device
Locate unit near correct input
power supply.
Y Special installation may be
required where gasoline or
volatile liquids are present −
see NEC Article 511 or CEC
Section 20.
1
18 in
(460 mm)
18 in
(460 mm)
loc_1 3/96 Ref. ST-800 311-B
OM-319 Page 11
Page 16
3-6.115 VAC Receptacle, Circuit Breaker, And Shielding Gas Connections
Y Turn off power before mak-
ing connections or resetting
circuit breaker.
1 115 V 15 A AC Receptacle
RC2
6
2
1
5
4
2 Circuit Breaker CB1
Receptacle is protected from over-
load by CB1.
Press button to reset breaker.
3 Gas Fittings
Fittings have 5/8-18 right-hand
threads.
4 Cylinder Valve
Open valve slightly so gas flow
blows dirt from valve. Close valve.
5 Regulator/Flowmeter
6 Flow Adjust
Typical flow rate is 15 cfh (cubic feet
per hour).
Route Cables and
hoses under bar.
3
3-7.Weld Output Terminals And Selecting Cable Sizes
Y ARC WELDING can cause Electromagnetic Interference.
To reduce possible interference, keep weld cables as short as possible, close together, and down low, such as on the floor.
Locate welding operation 100 meters from any sensitive electronic equipment. Be sure this welding machine is installed
and grounded according to this manual. If interference still occurs, the user must take extra measures such as moving
the welding machine, using shielded cables, using line filters, or shielding the work area.
Total Cable (Copper) Length In Weld Circuit Not Exceeding
YTurn Off power before
connecting to weld output
terminals
100 ft (30 m) Or Less
Welding
Amperes
1004443211/01/0
15033211/02/03/03/0
2003211/02/03/04/04/0
10 − 60%
Duty
Cycle
60 − 100%
Duty
Cycle
150 ft
(45 m)
200 ft
(60 m)
5/8, 1-1/8 in
Ref. ST-800 312-A / Ref. ST-158 697-A
250 ft
(70 m)
300 ft
(90 m)
10 − 100% Duty Cycle
350 ft
(105 m)
400 ft
(120 m)
250211/02/03/04/02-2/02-2/0
30011/02/03/04/02-2/02-3/02-3/0
3501/02/03/04/02-2/02-3/02-3/02-4/0
4001/02/03/04/02-2/02-3/02-4/02-4/0
Ref. ST-800 312-A
*Weld cable size (AWG) is based on either a 4 volts or less drop or a current density of at least 300 circular mils per ampere. Contact your
distributor for the mm2 equivalent weld cable sizes.S-0007-E
OM-319 Page 12
5002/03/04/02-2/02-3/02-4/03-3/03-3/0
Page 17
3-8.Remote 14 Receptacle Information
A
C
L
NH
YTurn Off power before connecting to receptacle
AJ
K
B
D
*The remaining sockets are not used.
I
L
M
G
F
E
Ref. ST-800 312-A
3-9.Electrical Service Guide
AMPERAGE
Socket*Information
A24 volts ac.
BContact closure to A completes 24 volts
ac contactor control circuit.
CCommand reference; 0 to +10 volts dc
output to remote control.
DRemote control circuit common.
E0 to +10 volts dc input command signal
from remote control.
KCircuit Common.
Single-PhaseThree-Phase
Input Voltage
Input Amperes At Rated Output
Max Recommended Standard Fuse Or Circuit
Breaker Rating In Amperes
Min Input Conductor Size In AWG/Kcmil
Max Recommended Input Conductor Length
In Feet (Meters)
Min Grounding Conductor Size In AWG/Kcmil
Reference: 1996 National Electrical Code (NEC).S-0092J
200230460575200230460575
5144221842371815
8070352560603020
8812148101414
82
(25)
88121410101414
108
(33)
173
(53)
176
(54)
93
(28)
80
(24)
126
(38)
196
(60)
OM-319 Page 13
Page 18
3-10. Placing Jumper Links
Y Disconnect and lockout/tag-
out input power before
installing or moving jumper
links.
Check input voltage available at
site.
1 Jumper Link Label
Move jumper links to match input
voltage, and label on unit.
Proceed to Section 3-11.
2
2 Primary Terminal Board
Do not overtighten.
200 VOLTS
L1L2L3
1
230 VOLTS
L1L2L3
230 VOLTS
L1L2L3
460 VOLTS
L1L2L3
460 VOLTS
L1L2L3
S-072 135-B
575 VOLTS
L1L2L3
S-164 976
OM-319 Page 14
3/8 in
Ref. ST-800 314
Page 19
3-11. Connecting Input Power
IMPORTANT
Single-Phase
Input Power Connections
Input
Terminal
Board
13
L1 L2 L3
Green Or
Green With
Yellow Stripe(s)
Always Connect Input
GND/
Grounding Conductor To
PE
GROUND Stud On Frame First.
Three-Phase
L1 L2 L3
GND/
PE
S-155 124
Y Disconnect and lockout/tag-
out input power before connecting input conductors
from unit.
Y Have only qualified persons
1
make this installation.
1 Input Power Connection Label
2 Input And Grounding
Conductors
See Section 3-9.
3 Line Disconnect Device
See Section 3-9.
Reinstall rear cover.
3
L3
L2
L1
L2
L1
Y Always connect
grounding conductor first.
= GND/PE
1
Install conductors into
a deenergized line dis-
2
connect device.
Three-Phase Connections
3
Install conductors into
a deenergized line dis-
2
connect device.
Y Always connect
grounding conductor first.
= GND/PE
Single-Phase Connections
3/8, 1/2, 7/16 in
input_3 3/96 - Ref. ST-800 314
OM-319 Page 15
Page 20
3-12. Connecting To Automation Connector Receptacle RC12
TerminalFunction
6
Electrode negative amplitude (0−10 volts)
5
Ground (circuit common)
4Electrode Positive amplitude (0−10 volts)
3Pulse train (0 or 15 volts, controls frequency and balance)
2
1
Electronic Box With Upper
Front Panel Open
Gas valve (+15 volts off)
Output contactor (+15 volts off)
Y Disconnect and lockout/tag-
out input power before connecting to receptacle RC12.
1 Main Control Board PC1
2 Automation Connector
Receptacle RC12
3 Terminals 1−6
See chart for terminal functions.
4 Terminal Screws
Loosen terminal screws, insert
wires into terminals, tighten
screws.
1
4
1
2
6
5
4
3
2
3
Tools Needed:
OM-319 Page 16
Ref. ST-801 509 / ST-801 719
Page 21
4-1.Controls
123 4 5 67 8 9
SECTION 4 − OPERATION
10
11
12
13
14
1 Mode Switch
(See Section 4-3)
2 Amperage Switch
(See Section 4-6)
3 Output Switch And Light
(See Section 4-5)
4 Start Switch
(See Section 4-11)
5 Polarity Switch And Lights
(See Section 4-2)
6 Amperage/Preset Meter
(See Section 4-4)
7 Voltmeter
(See Section 4-4)
8 Amperage Adjustment
Controls (See Section 4-6)
9 AC Frequency Controls
(See Section 4-9)
10 High Temperature Shutdown
Light
11 Over Voltage Shutdown Light
See Section 5-2)
12 Postflow Time Control
(See Section 4-10)
13 AC Balance Controls
(See Section 4-8)
14 Power On/Off Switch
(See Section 4-12)
Y Wear approved ear muffs or
ear plugs if noise exposure
exceeds OSHA limits.
4-2.Polarity Switch And Pilot Lights
1
ST-800 312-A
Y Do not use AC output in
damp areas, if movement is
confined, or if there is a dan-
ger of falling. Use AC output
ONLY if required for the
welding process, and then
2
3
use a remote output control.
1 Polarity Switch
Use switch to select weld output.
2 Electrode Positive Pilot Light
3 Electrode Negative Pilot Light
Both lights go on when switch is in
AC position.
Ref. ST-151 180-B
OM-319 Page 17
Page 22
4-3.Mode Switch
4-4.Amperage/Preset Meter And Voltmeter
1 Mode Switch
Use switch to select SMAW or
either GTAW welding process.
Selecting either GTAW position
enables the Start switch and gas
1
1
valve; both are disabled when the
SMAW position is selected.
GTAW Trigger Hold functions as
follows:
Press torch switch to start arc.
Switch can be released and arc remains on. Press switch to stop arc.
1 Amperage/Preset Meter
Use meter to preset amperage, ac
frequency, and ac balance. Meter
displays average weld amperage
output of unit to nearest ampere
when welding.
2 Voltmeter
Voltmeter displays average voltage
(to the nearest 0.1 V) at the weld
output terminals.
4-5.Output Switch And Pilot Light
2
Y Weld output terminals are
energized when switch is On
2
1
and power is On. Do not
touch torch or electrode and
work clamp at the same time.
1 Output Switch
2 Pilot Light
Use switch to select way of control-
ling unit output.
For weld output, place switch in On
position.
For remote output control, place
switch in Remote 14 position (see
Section 3-8).
Pilot light stays on continuously in
On position, but only when contactor is energized in Remote 14
position.
OM-319 Page 18
Page 23
4-6.Amperage Adjustment Controls
1
2
3
If Polarity switch is set incorrectly, the Amperage/Preset meter goes blank when the pushbutton is pressed.
Example: Setting Amperage For AC Output:
1 Amperage Control Switch
Use switch to select way of control-
ling amperage adjustment.
For front panel control, place switch
in Panel position.
For remote control, place switch in
Remote 14 position.
2 Electrode Positive Amperage
Adjustment Control And
Pushbutton
Set Polarity switch to AC, press
pushbutton and use control and
Amperage/Preset meter to adjust
weld amperage for positive half of
ac square wave.
When Polarity switch is in Electrode
Positive position, pushbutton does
not need to be pressed to adjust
control.
3 Electrode Negative Amperage
Adjustment Control And
Pushbutton
Set Polarity switch to AC, press
pushbutton and use control and
Amperage/Preset meter to adjust
weld amperage for negative half of
ac square wave.
When Polarity switch is in Electrode
Negative position, pushbutton does
not need to be pressed to adjust
control.
The controls require 3 turns to go
from minimum to maximum, and
may be adjusted while welding.
AMPERAGE/PRESET
Set Electrode Positive Amperage Level
Output =
AMPERAGE/PRESET
Set Electrode Negative Amperage Level
+150 A Electrode Positve
−250 A Electrode Negative
Ref. ST-151 180-B / Ref. S-0865
OM-319 Page 19
Page 24
4-7.Examples Of Combination Remote Amperage Control
Set SwitchesSet Output
1 Fingertip Control
2 Remote Foot Control
3 Remote Hand Control
See examples below.
If Polarity switch is not in AC, the Amperage/Preset meter goes blank when the
pushbutton is pressed.
1
Balance Control Waveform Examples
50% Electrode
Positive
50% Electrode
Negative
1 AC Balance Control And
Pushbutton
Set Polarity switch to AC. Use
pushbutton, control, and Amperage/Preset meter to change the ac
output square wave. The control requires 3 turns to go from minimum
to maximum.
Set balance towards 30.0 to obtain
more cleaning action of the workpiece, or towards 90.0 to obtain
deeper penetration of the workpiece. 50.0 (balanced), provides
equal penetration and cleaning
action.
More Penetration
More Cleaning
10% Electrode
90% Electrode
Negative
70% Electrode
30% Electrode
Negative
4-9.AC Frequency Controls
If Polarity switch is not in AC, the Amperage/Preset meter goes blank when the
pushbutton is pressed.
Positive
Positive
Ref. ST-151 180-B / S-0865
1 AC Frequency Control And
Pushbutton
Set Polarity switch to AC. Press
pushbutton and use control and
Amperage/Preset meter to set ac
frequency. Range is 40 to 400
hertz. The control requires 3 turns
to go from minimum to maximum.
For most applications, increasing
frequency improves arc stability.
1
OM-319 Page 21
Page 26
4-10. Postflow Time Control
4-11. Start Switch
1
Torch Start Example
23
1
“Touch”
1−2
Seconds
1 Postflow Time Control
Use control to set the length of time
in seconds gas flows after welding
stops.
1 Start Switch
2 GTAW Electrode
3 Workpiece
With HF on, start arc as follows:
High frequency turns on to help
start arc when contactor is energized. High frequency turns off
when arc is started, and turns on
whenever arc is broken to help
restart arc.
With Touch start on, set Polarity
switch to AC or Electrode Negative,
and start arc as follows:
Energize contactor, touch tungsten
electrode to workpiece at weld start
point, hold electrode to work-piece for 1-2 seconds, and slowly
lift electrode.
Open-circuit voltage is not present
before tungsten electrode touches
workpiece; only a low sensing voltage is present. The output contactor energizes only after tungsten
electrode is touching workpiece.
4-12. Power Switch
OM-319 Page 22
Do NOT Strike Like A Match
Ref. S-156 279
1 Power Switch
Use switch to turn unit On and Off.
1
Ref. ST-157 885
Page 27
4-13. Optional Controls
1
2
1 GTAW Trigger Hold Switch
(See Section 4-14)
2 Preflow Time Controls
(See Section 4-16)
3 Initial Sequence Controls
(See Section 4-17)
4 Spot Time Controls
(See Section 4-15)
5 Pulser Controls
(See Section 4-18)
6 Final Sequence Controls
(See Section 4-19)
6
345
4-14. GTAW Trigger Hold Switch (Optional)
1
Ref. ST-800 312-A
1 Mode Switch
Set Mode switch as shown.
2 GTAW Trigger Hold Switch
Up Position:
Press torch switch to start preflow
and/or initial amperage. Release
switch and arc stays on. Press
switch again to start final slope.
Down Position:
Press torch switch to start preflow
and/or initial amperage. Release
switch to start initial slope and weld
sequences. Press switch again to
start final slope. Release switch to
stop arc and start postflow.
2
See Section 4-3.
Ref. ST-151 180-B / Ref. ST-158 132-A
OM-319 Page 23
Page 28
4-15. Spot Time Controls (Optional)
1
4-16. Preflow Time Controls (Optional)
1
1 Spot Time Switch
On − provides spot time;
Off − provides no spot time
Off − for SMAW.
2 Spot Time Control
2
2
Use control to set time for GTAW
spot welds. Spot time begins at arc
initiation. If arc is broken during spot
time cycle, timer stops but does not
reset. When spot time has ended,
weld output stops. Postflow starts
when remote contactor is opened.
Spot timer resets after contactor
opens.
Ref. ST-158 132-A
1 Preflow Time Switch
On − provides preflow time;
Off − provides no preflow;
Off − for SMAW.
2 Preflow Time Control
Use control to set length of time gas
flows before an arc is started.
4-17. Initial Sequence Controls (Optional)
3
1
2
1 Initial Sequence Switch
On − Initial Sequence control;
Off − No Initial Sequence control;
Off − for SMAW.
2 Initial Time Control
Use control to set length of time at
initial amperage output before
going to Amperage adjustment
controls settings output.
3 Initial Amperage Control
Use control to select amperage lev-
el for arc starting that is different
than Amperage adjustment con-
4
trols settings.
4 Initial Slope Time
Use control to set time it takes
amperage level to go from initial
amperage level at end of initial time
to weld sequence level set by
Amperage adjustment controls.
OM-319 Page 24
Page 29
4-18. Pulser Controls (Optional)
1234
1 Pulser Switch
Off − no pulsing;
Slow − pulsing, use inside scale of
Pulses Per Second control;
Fast − pulsing, use outside scale of
Pulses Per Second control.
Off − for SMAW.
2 Background Amperage
Control
Use control to select background
amperage during pulsed welding.
Background amperage is a percentage (0 − 100%) of peak amper-
age. Peak amperage is setting of
the Amperage adjustment controls
(see Section 4-6).
3 Pulses Per Second Control
Use control to select frequency
(number of pulses per second).
4 % On Time Control
Use control to select pulse width,
the percentage of a total pulse
period that is at peak amperage.
See Section 4-20 for an explanation
of pulse waveforms.
4-19. Final Sequence Controls (Optional)
1
3
1 Final Sequence Switch
On − Final Sequence control;
Off − no Final Sequence control
Off − for SMAW.
2 Final Amperage Control
2
4
Use control to select final sequence
amperage level.
The numbers are a percentage of
the Amperage adjustment control
settings (see Section 4-6), and not
an actual value.
3 Final Slope Time
Use control to set time to taper weld
output from level of the Amperage
adjustment controls settings to the
Final Amperage level.
4 Final Time Control
Use control to set length of time at
final amperage before arc turns off.
When using the final sequence
circuit, set Postflow time control
(see Section 4-10) for a longer time
than the Final Time control.
OM-319 Page 25
Page 30
4-20. Pulsed Weld Waveforms
4
Example A
(50%)
1
Example B
(80%)
Example C
(20%)
1 Peak Amperage
Peak amperage is the high pulse of
welding current that heats the weld
puddle.
2 Background Amperage
Background amperage is the low
pulse of welding current that cools
the weld puddle.
3 Pulse Width (Peak Amperage
2
5
3
7
Period)
4 % On Time
The examples show three different
control settings. The stiffness or
wetness of the weld puddle is
controlled by pulse width.
5 One Pulse Period
6 Pulses Per Second
All three examples show a control
setting of three pulses per second.
7 Background Amperage Period
6
S-0259 / Ref. ST-158 132-A
OM-319 Page 26
Page 31
SECTION 5 − MAINTENANCE & TROUBLESHOOTING
5-1.Routine Maintenance
Replace
Damaged Or
Unreadable
Labels
Y Disconnect power
before maintaining.
3 Months
Replace Damaged
Gas Hose
6 Months
Blow Out Or
Vacuum Inside
. Maintain more often
during severe conditions.
Clean
And
Tighten
Weld
Terminals
Repair Or Replace
Cracked Cables
And Cords
OM-319 Page 27
Page 32
5-2.Overload Protection And Adjusting Spark Gap
1
2
3
4
8
1 Over Voltage Shutdown Light
Light goes on when unit has shut
down because of an output over
voltage problem. This can only
occur when Polarity switch is in AC
position.
Check to make sure weld cables
are routed as close together as
possible, and that they are not too
long (see Section 3-7). Momentarily
turn Power switch Off and back On,
and resume welding.
Y Turn Off unit.
2 Fuse Holder Cover
3 Fuse (See Parts List)
If F1 opens, the unit shuts down.
Replace F1 if open.
. If fuse continues to open, con-
tact Factory Authorized Ser-
vice Agent.
Y Turn Off unit, and disconnect
input power.
. Spark gap is preset at factory
and normally requires no ad-
justment; only adjust if hard arc
starting occurs.
4 Lower Front Panel
Remove screws and drop lower
front panel. Remove cover plate to
access spark gap.
5 Tungsten End Of Point
Do not clean or dress tungsten. Re-
place point if tungsten end
disappears.
6 Spark Gap
Normal spark gap is 0.008 in (0.203
mm).
If spark gap is okay, reinstall cover
plate and secure lower front panel.
If adjustment is needed, continue
as follows:
7 Adjustment Screw
Loosen screw. Place feeler gauge
of proper thickness in spark gap.
8 Pressure Point
Apply slight pressure at point until
gauge is held firmly in gap. Tighten
adjustment screw.
7
Reinstall cover plate and secure
lower front panel.
OM-319 Page 28
65
1/4 in
5/32 in
0.008 in (0.203 mm)
Ref. ST-800 312-A / ST-800 561
Page 33
5-3.Troubleshooting
TroubleRemedy
No weld output; unit completely
inoperative.
No weld output; fan on.Place Output switch in On position, or place switch in Remote 14 position and connect remote contactor
No weld output; fan on; High Temperature light on.
No weld output; Over Voltage light on.Over voltage shutdown. Check weld cables, and turn Power switch Off and back On again (see Section
Erratic or improper weld output.Use proper size and type of weld cable (see Section 3-7).
No control of weld output.Place Output switch in On position, or place switch in Remote 14 position and connect remote contactor
Place Power switch in On position (see Section 4-12).
Place line disconnect switch in the On position (see Section 3-11).
Check and replace line fuse(s) or reset circuit breaker (see Section 3-11).
Check for proper input connections (see Section 3-11).
Check for proper jumper link positions (see Section 3-10).
Check fuse F1 and replace if necessary (see Section 5-2).
to Remote 14 receptacle (see Sections 4-1 and 3-8).
Check, repair, or replace remote control.
Unit overheated. Allow unit to cool with fans on (see Section 3-3).
5-2).
Clean and tighten all weld connections.
Be sure Polarity switch is in proper position for welding process (see Section 4-2).
to Remote 14 receptacle (see Sections 4-1 and 3-8).
No output from duplex receptacle RC2. Check, and reset circuit breaker CB1 if necessary (see Section 3-6).
Amperage/Preset meter goes blank
when presetting Amperage, AC
Balance, or AC Frequency.
No high frequency; difficulty in establishing GTAW arc.
Wandering arc − poor control of direction
of arc.
Tungsten electrode oxidizing and not remaining bright after conclusion of weld.
Be sure Polarity switch is in AC position (see Section 4-2).
Check position of Start switch (see Section 4-11).
Select proper size tungsten.
Be sure that electrode holder cable is not close to any grounded metal.
Check cables and torch for cracked insulation or bad connections. Repair or replace necessary parts.
Check spark gaps and adjust if necessary (see Section 5-2).
Reduce gas flow rate.
Select proper size tungsten.
Properly prepare tungsten.
Shield weld zone from drafts.
Increase postflow time (see Section 4-10).
Check and tighten all gas fittings.
Properly prepare tungsten.
Replace torch parts if water has leaked into torch.
OM-319 Page 29
Page 34
SECTION 6 − ELECTRICAL DIAGRAM
OM-319 Page 30
Figure 6-1. Circuit Diagram
Page 35
SD-185 645-C
OM-319 Page 31
Page 36
SECTION 7 − HIGH FREQUENCY
7-1.Welding Processes Requiring High Frequency
1
Work
TIG
7-2.Incorrect Installation
Weld Zone
11, 12
50 ft
(15 m)
1 High-Frequency Voltage
TIG − helps arc jump air gap
between torch and workpiece and/
or stabilize the arc.
high_freq 12/96 − S-0693
13
10
9
8
7
3
2
1
456
14
Sources of Direct High-Frequency
Radiation
1 High-Frequency Source (welding
power source with built-in HF or
separate HF unit)
2 Weld Cables
3 Torch
4 Work Clamp
5 Workpiece
6 Work Table
OM-319 Page 32
Sources of Conduction of High
Frequency
7 Input Power Cable
8 Line Disconnect Device
9 Input Supply Wiring
Sources of Reradiation of High
Frequency
10 Ungrounded Metal Objects
11 Lighting
12 Wiring
13 Water Pipes and Fixtures
14 External Phone and Power Lines
S-0694
Page 37
7-3.Correct Installation
6
8
Ground all metal objects and all wiring in
welding zone using
#12 AWG wire.
Nonmetal
Building
Weld Zone
3
50 ft
(15 m)
1
2
8
4
Ground
workpiece
if required
by codes.
50 ft
(15 m)
5
7
1 High-Frequency Source (welding
power source with built-in HF or
separate HF unit)
Ground metal machine case, work output
terminal, line disconnect device, input
supply, and worktable.
2 Center Point of Welding Zone
Midpoint between high-frequency source
and welding torch.
3 Welding Zone
A circle 50 ft (15 m) from center point in all
directions.
4 Weld Output Cables
Keep cables short and close together.
Metal Building
8
11
10
5 Conduit Joint Bonding and Grounding
Electrically join (bond) all conduit sections
using copper straps or braided wire. Ground
conduit every 50 ft (15 m).
6 Water Pipes and Fixtures
Ground water pipes every 50 ft (15 m).
7 External Power or Telephone Lines
Locate high-frequency source at least 50 ft
(15 m) away from power and phone lines.
8 Grounding Rod
Consult the National Electrical Code for
specifications.
9
8
Ref. S-0695 / Ref. S-0695
Metal Building Requirements
9 Metal Building Panel Bonding Methods
Bolt or weld building panels together, install
copper straps or braided wire across seams,
and ground frame.
10 Windows and Doorways
Cover all windows and doorways with
grounded copper screen of not more than
1/4 in (6.4 mm) mesh.
+When ordering a component originally displaying a precautionary label, the label should also be ordered.
To maintain the factory original performance of your equipment, use only Manufacturer’s Suggested
Replacement Parts. Model and serial number required when ordering parts from your local distributor.
♦Part of 042 888 Optional Aerowave Full Feature Module.
To maintain the factory original performance of your equipment, use only Manufacturer’s Suggested
Replacement Parts. Model and serial number required when ordering parts from your local distributor.
To maintain the factory original performance of your equipment, use only Manufacturer’s Suggested
Replacement Parts. Model and serial number required when ordering parts from your local distributor.
To maintain the factory original performance of your equipment, use only Manufacturer’s Suggested
Replacement Parts. Model and serial number required when ordering parts from your local distributor.
To maintain the factory original performance of your equipment, use only Manufacturer’s Suggested
Replacement Parts. Model and serial number required when ordering parts from your local distributor.
To maintain the factory original performance of your equipment, use only Manufacturer’s Suggested
Replacement Parts. Model and serial number required when ordering parts from your local distributor.
Call
1-800-4-A-MILLER
for your local
Miller distributor.
Your distributor also gives
you ...
Service
You always get the fast,
reliable response you
need. Most replacement
parts can be in your
hands in 24 hours.
Support
Need fast answers to the
tough welding questions?
Contact your distributor.
The expertise of the
distributor and Miller is
there to help you, every
step of the way.
Effective January 1, 2005
(Equipment with a serial number preface of “LF” or newer)
This limited warranty supersedes all previous Miller warranties and is exclusive with no other
LIMITED WARRANTY − Subject to the terms and conditions
below, Miller Electric Mfg. Co., Appleton, Wisconsin, warrants to
its original retail purchaser that new Miller equipment sold after
the effective date of this limited warranty is free of defects in
material and workmanship at the time it is shipped by Miller.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE
WARRANTIES OF MERCHANTABILITY AND FITNESS.
Within the warranty periods listed below, Miller will repair or
replace any warranted parts or components that fail due to such
defects in material or workmanship. Miller must be notified in
writing within thirty (30) days of such defect or failure, at which
time Miller will provide instructions on the warranty claim
procedures to be followed.
Miller shall honor warranty claims on warranted equipment
listed below in the event of such a failure within the warranty
time periods. All warranty time periods start on the date that the
equipment was delivered to the original retail purchaser, or one
year after the equipment is sent to a North American distributor
or eighteen months after the equipment is sent to an
International distributor.
1. 5 Years Parts — 3 Years Labor
* Original main power rectifiers
* Inverters (input and output rectifiers only)
2. 3 Years — Parts and Labor
* Transformer/Rectifier Power Sources
* Plasma Arc Cutting Power Sources
* Semi-Automatic and Automatic Wire Feeders
* Inverter Power Sources (Unless Otherwise Stated)
(NOTE: Engines are warranted separately by
the engine manufacturer.)
3. 1 Year — Parts and Labor Unless Specified
* DS-2 Wire Feeder
* Motor Driven Guns (w/exception of Spoolmate
Spoolguns)
* Process Controllers
* Positioners and Controllers
* Automatic Motion Devices
* RFCS Foot Controls
* Induction Heating Power Sources and Coolers
* Water Coolant Systems (Non-Integrated)
* Flowgauge and Flowmeter Regulators (No Labor)
* HF Units
* Grids
* Maxstar 85, 140
* Spot Welders
* Load Banks
* Arc Stud Power Sources & Arc Stud Guns
* Racks
* Running Gear/Trailers
* Plasma Cutting Torches (except APT & SAF
Models)
* Field Options
(NOTE: Field options are covered under True
Blue®for the remaining warranty period of the
product they are installed in, or for a minimum of
one year — whichever is greater.)
4. 6 Months — Batteries
5. 90 Days — Parts
* MIG Guns/TIG Torches
guarantees or warranties expressed or implied.
* Induction Heating Coils and Blankets
* APT & SAF Model Plasma Cutting Torches
* Remote Controls
* Accessory Kits
* Replacement Parts (No labor)
* Spoolmate Spoolguns
* Canvas Covers
Miller’s True Blue® Limited Warranty shall not apply to:
1. Consumable components; such as contact tips,
cutting nozzles, contactors, brushes, slip rings,
relays or parts that fail due to normal wear. (Exception:
brushes, slip rings, and relays are covered on Bobcat,
Trailblazer, and Legend models.)
2. Items furnished by Miller, but manufactured by others,
such as engines or trade accessories. These items are
covered by the manufacturer’s warranty, if any.
3. Equipment that has been modified by any party other than
Miller, or equipment that has been improperly installed,
improperly operated or misused based upon industry
standards, or equipment which has not had reasonable
and necessary maintenance, or equipment which has
been used for operation outside of the specifications for the
equipment.
MILLER PRODUCTS ARE INTENDED FOR PURCHASE AND
USE BY COMMERCIAL/INDUSTRIAL USERS AND
PERSONS TRAINED AND EXPERIENCED IN THE USE AND
MAINTENANCE OF WELDING EQUIPMENT.
In the event of a warranty claim covered by this warranty, the
exclusive remedies shall be, at Miller’s option: (1) repair; or (2)
replacement; or, where authorized in writing by Miller in
appropriate cases, (3) the reasonable cost of repair or
replacement at an authorized Miller service station; or (4)
payment of or credit for the purchase price (less reasonable
depreciation based upon actual use) upon return of the goods at
customer’s risk and expense. Miller’s option of repair or
replacement will be F.O.B., Factory at Appleton, Wisconsin, or
F.O.B. at a Miller authorized service facility as determined by
Miller. Therefore no compensation or reimbursement for
transportation costs of any kind will be allowed.
TO THE EXTENT PERMITTED BY LAW, THE REMEDIES
PROVIDED HEREIN ARE THE SOLE AND EXCLUSIVE
REMEDIES. IN NO EVENT SHALL MILLER BE LIABLE FOR
DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES (INCLUDING LOSS OF
PROFIT), WHETHER BASED ON CONTRACT, TORT OR
ANY OTHER LEGAL THEORY.
ANY EXPRESS WARRANTY NOT PROVIDED HEREIN AND
ANY IMPLIED WARRANTY, GUARANTY OR
REPRESENTATION AS TO PERFORMANCE, AND ANY
REMEDY FOR BREACH OF CONTRACT TORT OR ANY
OTHER LEGAL THEORY WHICH, BUT FOR THIS
PROVISION, MIGHT ARISE BY IMPLICATION, OPERATION
OF LAW, CUSTOM OF TRADE OR COURSE OF DEALING,
INCLUDING ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR PARTICULAR
PURPOSE, WITH RESPECT TO ANY AND ALL EQUIPMENT
FURNISHED BY MILLER IS EXCLUDED AND DISCLAIMED
BY MILLER.
Some states in the U.S.A. do not allow limitations of how long an
implied warranty lasts, or the exclusion of incidental, indirect,
special or consequential damages, so the above limitation or
exclusion may not apply to you. This warranty provides specific
legal rights, and other rights may be available, but may vary
from state to state.
In Canada, legislation in some provinces provides for certain
additional warranties or remedies other than as stated herein,
and to the extent that they may not be waived, the limitations
and exclusions set out above may not apply. This Limited
Warranty provides specific legal rights, and other rights may be
available, but may vary from province to province.
miller_warr 1/05
Page 52
Owner’s Record
Please complete and retain with your personal records.
Model NameSerial/Style Number
Purchase Date(Date which equipment was delivered to original customer.)
Distributor
Address
City
StateZip
For Service
Contact a DISTRIBUTOR or SERVICE AGENCY near you.
Always provide Model Name and Serial/Style Number.
Contact your Distributor for:
Welding Supplies and Consumables
Options and Accessories
Personal Safety Equipment
Service and Repair
Replacement Parts
Training (Schools, Videos, Books)
Technical Manuals (Servicing Information
and Parts)
Circuit Diagrams
Welding Process Handbooks
To locate a Distributor or Service Agency visit
www.millerwelds.com or call 1-800-4-A-Miller
Miller Electric Mfg. Co.
An Illinois Tool Works Company
1635 West Spencer Street
Appleton, WI 54914 USA
International Headquarters−USA
USA Phone: 920-735-4505 Auto-Attended
USA & Canada FAX: 920-735-4134
International FAX: 920-735-4125
European Headquarters −
United Kingdom
Phone: 44 (0) 1204-593493
FAX: 44 (0) 1204-598066
www.MillerWelds.com
Contact the Delivering Carrier to:
File a claim for loss or damage during
shipment.
For assistance in filing or settling claims, contact
your distributor and/or equipment manufacturer’s
Transportation Department.