September 2001
Specifications Covered by this Manual:
500 436 and 500 437
Processes
Air Plasma Cutting
and Gouging
Description
Air Plasma Cutter
AirForce 250/
AirForce 250A
And Ice-12C Torch
Page 2
From Hobart to You
Thank you and congratulations on choosing Hobart.
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.
This Owner’s Manual is designed to help you get the
most out of your Hobart 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 Hobart you can count on
years of reliable service with proper
maintenance. And if for some reason the unit
Hobart is registered to the
ISO 9001 Quality System
Standard.
needs repair, there’s a Troubleshooting section
that will help you figure out what the problem
is. The parts list will then help you to decide
which 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 Hobart is backed by
the best warranty in the
business.
Hobart Welders manufactures a full line
of welders and welding related equipment.
For information on other quality Hobart
products, contact your local Hobart distributor
to receive the latest full line catalog or
individual catalog sheets. To locate your nearest
distributor or service agency call 1-877-Hobart1.
Hobart offers a Technical
Manual which provides
more detailed service and
parts information for your
unit. T o obtain a Technical
Manual, contact your local
distributor. Your distributor
can also supply you with
Welding Process Manuals
such as SMAW, GTAW,
GMAW, and GMA W-P.
Page 3
WARNING
This product, when used
for welding or cutting,
produces fumes or
gases which contain
chemicals known to the
State of California to
cause birth defects and,
in some cases, cancer.
(California Health &
Safety Code Section
SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING
pom _nd_9/98
1-1.Symbol Usage
Means Warning! Watch Out! There are possible hazards
with this procedure! The possible hazards are shown in
the adjoining symbols.
Y Marks a special safety message.
. Means “Note”; not safety related.
1-2.Plasma Arc Cutting 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 1-4. 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.
CUTTING can cause fire or explosion.
Hot metal and sparks blow out from the cutting arc.
The flying sparks and hot metal, hot workpiece, and
hot equipment can cause fires and burns. Check
and be sure the area is safe before doing any cutting.
D Protect yourself and others from flying sparks and hot metal.
D Do not cut where flying sparks can strike flammable material.
D Remove all flammables within 35 ft (10.7 m) of the cutting arc. If this
is not possible, tightly cover them with approved covers.
D Be alert that sparks and hot materials from cutting 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 cutting on a ceiling, floor, bulkhead, or partition can
cause fire on the hidden side.
D Do not cut on closed containers such as tanks or drums.
D Connect work cable to the work as close to the cutting area as prac-
tical to prevent cutting current from traveling long, possibly
unknown paths and causing electric shock and fire hazards.
D Never cut containers with potentially flammable materials inside –
they must be emptied and properly cleaned first.
D Do not cut in atmospheres containing explosive dust or vapors.
D Do not cut pressurized cylinders, pipes, or vessels.
D Do not cut containers that have held combustibles.
D Wear oil-free protective garments such as leather gloves, heavy
shirt, cuffless trousers, high shoes, and a cap.
D Do not locate unit on or over combustible surfaces.
D Remove any combustibles, such as a butane lighter or matches,
from your person before doing any cutting.
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 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 touch torch parts if in contact with the work or ground.
D Turn off power before checking, cleaning, or changing torch parts.
D Disconnect input power before installing or servicing this equip-
ment. Lockout/tagout input power according to OSHA 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 Check and be sure that input power cord ground wire is properly
connected t o ground terminal in disconnect box or that cord plug is
connected to a properly grounded receptacle outlet – always verify
the supply ground.
D When making input connections, attach proper grounding conduc-
tor first.
D Frequently inspect input power cord for damage or bare wiring – re-
place cord immediately if damaged – bare wiring can kill.
D Turn off all equipment when not in use.
D Inspect and replace any worn or damaged torch cable leads.
D Do not wrap torch cable around your body.
D Ground the workpiece to a good electrical (earth) ground if required
by codes.
D Use only well-maintained equipment. Repair or replace damaged
parts at once.
D Wear a safety harness if working above floor level.
D Keep all panels and covers securely in place.
D Do not bypass or try to defeat the safety interlock systems.
D Use only torch(es) specified in Owner’s Manual.
D Keep away from torch tip and pilot arc when trigger is pressed.
D Clamp work cable with good metal-to-metal contact to workpiece
(not piece that will fall away) or worktable as near the cut as
practical.
D Insulate work clamp when not connected to workpiece to prevent
contact with any metal object.
ELECTRIC SHOCK can kill.
ELECTRIC SHOCK can kill.
Touching live electrical parts can cause fatal shocks
or severe burns. The torch and work circuit are
electrically live whenever the output is on. The input
power circuit and machine internal circuits are also
higher voltages than welding to start and maintain the arc (200 to 400
volts dc are common), but also uses torches designed with safety
interlock systems which turn of f the machine when the shield cup is
loosened or if tip touches electrode inside the nozzle. Incorrectly
installed or improperly grounded equipment is a hazard.
live when power is on. Plasma arc cutting requires
SIGNIFICANT DC VOLTAGE exists on
internal parts of inverter power
sources AFTER the removal of input
power.
D Turn Off unit, disconnect input power , check voltage on input ca-
pacitors, and be sure it is near zero (0) volts before touching any
parts. Check capacitors according to instructions in Maintenance Section of Owner’s Manual or Technical Manual before
touching any parts.
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Page 6
EXPLODING PARTS can injure.
D On inverter power sources, failed parts can ex-
plode or cause other parts to explode when
power is applied. Always wear a face shield
and long sleeves when servicing inverters.
FLYING SPARKS can cause injury.
Sparks and hot metal blow out from the cutting arc.
Chipping and grinding cause flying metal.
D Wear approved face shield or safety goggles with side shields.
D Wear proper body protection to protect skin.
D Wear flame-resistant ear plugs or ear muffs to prevent sparks from
entering ears.
ARC RAYS can burn eyes and skin.
Arc rays from the cutting process produce intense
visible and invisible (ultraviolet and infrared) rays
that can burn eyes and skin.
D Wear face protection (helmet or shield) with correct shade of filter to
protect your face and eyes when cutting or watching. ANSI Z49.1
(see Safety Standards) suggests a No. 9 shade (with No. 8 as minimum) for all cutting currents less than 300 amperes. Z49.1 adds
that lighter filter shades may be used when the arc is hidden by the
workpiece. As this is normally the case with low current cutting, the
shades suggested in Table 1 are provided for the operator’s convenience.
D Wear approved safety glasses with side shields under your helmet
or shield.
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
material (leather and wool) and foot protection.
Table 1. Eye Protection For Plasma Arc Cutting
Current Level In AmperesMinimum Shade Number
Below 20
20 – 40
40 – 60
60 – 80
#4
#5
#6
#8
NOISE can damage hearing.
Prolonged noise from some cutting applications can
damage hearing if levels exceed limits specified by
OSHA (see Safety Standards).
D Use approved ear plugs or ear muffs if noise level is high.
D Warn others nearby about noise hazard.
FUMES AND GASES can be hazardous.
Cutting 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
cutting fumes and gases.
D If ventilation is poor, use an approved air-supplied respirator.
D Read the Material Safety Data Sheets (MSDSs) and the manufac-
turer’s instruction for metals to be cut, coatings, and cleaners.
D Work in a confined space only if it is well ventilated, or while wearing
an air-supplied respirator. Fumes from cutting and oxygen depletion can alter air quality causing injury or death. Be sure the
breathing air is safe.
D Do not cut in locations near degreasing, cleaning, or spraying oper-
ations. The heat and rays of the arc can react with vapors to form
highly toxic and irritating gases.
D Do not cut on coated metals, such as galvanized, lead, or cadmium
plated steel, unless the coating is removed from the cutting area,
the area is well ventilated, and if necessary, while wearing an airsupplied respirator. The coatings and any metals containing these
elements can give off toxic fumes when cut.
D Do not cut containers with toxic or reactive materials inside or
containers that have held toxic or reactive materials – they must be
emptied and properly cleaned first.
PLASMA ARC can cause injury.
The heat from the plasma arc can cause serious
burns. The force of the arc adds greatly to the burn
hazard. The intensely hot and powerful arc can
quickly cut through gloves and tissue.
D Keep away from the torch tip.
D Do not grip material near the cutting path.
D The pilot arc can cause burns – keep away from torch tip when trig-
ger is pressed.
D Wear proper flame-retardant clothing covering all exposed body ar-
eas.
D Point torch away from your body and toward work when pressing
the torch trigger – pilot arc comes on immediately.
D Turn off power source and disconnect input power before disas-
sembling torch or changing torch parts.
D Use only torch(es) specified in the Owner’s Manual.
CYLINDERS can explode if damaged.
Gas cylinders contain gas under high pressure. If
damaged, a cylinder can explode. Since gas cylinders are normally part of metalworking processes,
be sure to treat them carefully.
D Protect compressed gas cylinders from excessive heat, mechani-
cal shocks, slag, open flame, sparks, and arcs.
D Install and secure cylinders in an upright position by chaining them
to a stationary support or equipment cylinder rack to prevent falling
or tipping.
D Keep cylinders away from any cutting or other electrical circuits.
D Never allow electrical contact between a plasma arc torch and a
cylinder.
D Never cut on a pressurized cylinder – explosion will result.
D Use only correct gas cylinders, regulators, hoses, and fittings de-
signed 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, asso-
ciated equipment, and CGA publication P-1 listed in Safety
Standards.
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Page 7
1-3.Additional Symbols For Installation, Operation, And Maintenance
HOT PARTS can cause severe burns.
D Do not touch hot parts bare handed.
D Allow cooling period before working on torch.
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.
FLYING METAL can injure eyes.
D Wear safety glasses with side shields or face
shield.
MAGNETIC FIELDS can affect pacemakers.
D Pacemaker wearers keep away.
D Wearers should consult their doctor before go-
ing near plasma arc cutting operations.
OVERUSE can cause OVERHEATING.
D Allow cooling period; follow rated duty cycle.
D Reduce amperage (thickness) or reduce duty
cycle before starting to cut again.
FIRE OR EXPLOSION hazard.
D Do not locate 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.
STATIC (ESD) can damage PC boards.
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.
H.F. RADIATION can cause inter fer ence.
D High frequency (H.F.) can interfere with radio
navigation, safety services, computers, and
communications equipment.
D Have only qualified persons familiar with elec-
tronic equipment perform this installation.
D The user is responsible for having a qualified electrician promptly
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.
EXPLODING HYDROGEN hazard.
D When cutting aluminum underwater or with the
water touching the underside of the aluminum,
free hydrogen gas may collect under the workpiece.
D See your cutting engineer and water table instructions for help.
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 unit.
D If using lift forks to move unit, be sure forks are long enough to ex-
tend beyond opposite side of unit.
ARC CUTTING can cause interference.
D Electromagnetic energy can interfere with
sensitive electronic equipment such as
computers and computer-driven equipment
such as robots.
D T o reduce possible interference, keep cables as short as possible,
close together, and down low, such as on the floor.
D Locate cutting operation 100 meters from any sensitive electronic
equipment.
D Be sure this cutting power source is installed and grounded
according t o this manual.
D If interference still occurs, the user must take extra measures such
as moving the machine, using shielded cables, using line filters, or
shielding the work area.
OM-928 Page 3
Page 8
1-4.Principal Safety Standards
Safety in Welding and Cutting, ANSI Standard Z49.1, from American
Welding Society, 550 N.W. LeJeune Rd, Miami FL 33126
Safety and Health Standards, OSHA 29 CFR 1910, from Superintendent of Documents, U.S. Government Printing Office, Washington, D.C.
20402.
Recommended Practices for Plasma Arc Cutting, American Welding
Society Standard A WS C5.2, from American W elding Society, 550 N.W .
LeJeune R d , M i a m i , F L 3 3 1 2 6
Recommended Safe Practices for the Preparation for W elding and Cutting of Containers That Have Held Hazardous Substances, American
Welding Society Standard AWS F4.1, from American W elding Society,
550 N.W. LeJeune Rd, Miami, FL 33126
National Electrical Code, NFPA Standard 70, from National Fire Protection Association, Batterymarch Park, Quincy, MA 02269.
1-5.EMF Information
Considerations About Welding Or Cutting And The Effects Of Low
Frequency Electric And Magnetic Fields
Welding or cutting current, as it flows through the welding or cutting
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 power-frequency electric and magnetic fields is a humanhealth hazard.” However, studies are still going forth and evidence
continues t o b e 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:
Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1,
from Compressed Gas Association, 1235 Jefferson Davis Highway,
Suite 501, Arlington, VA 22202.
Code for Safety in Welding and Cutting, CSA Standard W117.2, from
Canadian Standards Association, Standards Sales, 178 Rexdale Boulevard, Rexdale, Ontario, Canada M9W 1R3.
Safe Practices For Occupation And Educational Eye And Face Protec-tion, ANSI Standard Z87.1, from American National Standards Institute,
1430 Broadway, New Y ork, NY 10018.
Cutting And Welding Processes, NFPA Standard 51B, from National
Fire Protection Association, Batterymarch Park, Quincy, MA 02269.
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 cutting power source and cables as far away from operator
as practical.
5. Connect work clamp to workpiece as close to the cut as possible.
About Pacemakers:
Pacemaker wearers consult your doctor first. If cleared by your doctor,
then following the above procedures is recommended.
OM-928 Page 4
Page 9
SECTION 1 – CONSIGNES DE SÉCURITÉ – LIRE AVANT UTILISATION
pom_nd_fre_5/97
1-1.Signification des symboles
Signifie Mise en garde ! Soyez vigilant ! Cette procédure
présente des risques de danger ! Ceux-ci sont identifiés
par des symboles adjacents aux directives.
Y Identifie un message de sécurité particulier.
. Signifie NOTA ; n’est pas relatif à la sécurité.
1-2.Dangers liés au coupage à l’arc au plasma
Y Les symboles présentés ci-après sont utilisés tout au long du
présent manuel pour attirer votre attention et identifier les risques de danger. Lorsque vous voyez un symbole, soyez
vigilant e t suivez les directives mentionnées afin d’éviter tout
danger. Les consignes de sécurité présentées ci-après ne font
que résumer l’information contenue dans les normes de sécurité énumérées à la section 1-5. Veuillez lire et respecter toutes
ces normes de sécurité.
Y L’installation, l’utilisation, l’entretien et les réparations ne
doivent être confiés qu’à des personnes qualifiées.
Y Au cours de l’utilisation, tenir toute personne à l’écart et plus
particulièrement les enfants.
LE COUPAGE présente un risque de
feu ou d’explosion.
Des particules de métal chaud et des étincelles
peuvent jaillir de la pièce au moment du coupage.
Les étincelles et le métal chaud, la pièce à couper
feu ou des brûlures. Avant d e commencer à travailler, assurez–vous
que l’endroit est sécuritaire.
D Protégez–vous, ainsi que toute autre personne travaillant sur les
lieux, contre les étincelles et le métal chaud.
D Ne coupez pas dans un endroit où des étincelles pourraient attein-
dre des matières inflammables.
D Déplacez toute matière inflammable se trouvant à l’intérieur d’un
périmètre de 10,7 m (35 pi) de la pièce à couper. Si cela est impossible, vous devez les couvrir avec des housses approuvées et bien
ajustées.
D Assurez–vous qu’aucune étincelle ni particule de métal ne peut se
glisser dans de petites fissures ou tomber dans d’autres pièces.
D Afin d’éliminer tout risque de feu, soyez vigilant et gardez toujours
un extincteur à la portée de la main.
D Si vous coupez sur un plafond, un plancher ou une cloison, soyez
conscient que cela peut entraîner un feu de l’autre côté.
D Ne coupez pas sur un contenant fermé tel qu’un réservoir ou u n b i-
don.
D Fixez le câble de masse sur la pièce à couper, le plus près possible
de la zone à couper afin de prévenir que le courant de coupage ne
prenne une trajectoire inconnue ou longue et ne cause ainsi une dé-
charge électrique ou un feu.
D Ne coupez jamais des contenants qui peuvent contenir des matiè-
res inflammables. Vous devez en premier lieu les vider et les
nettoyer convenablement.
D Ne coupez pas dans un endroit où l’atmosphère risque de contenir
de la poussière ou des vapeurs explosives.
D Ne coupez pas de bouteilles, de tuyaux ou de contenants pressuri-
sés.
D Ne coupez pas de contenants qui ont déjà reçu des combustibles.
D Portez des vêtements de protection exempts d’huile tels que des
gants en cuir, une veste résistante, des pantalons sans revers, des
bottes et un casque.
D Ne placez pas le poste sur une surface combustible ou au–dessus
de celle–ci.
D Avant le coupage, retirez tout combustible de vos poches, par
exemple u n b r i q u e t a u butane ou des allumettes.
chauffée et l’équipement chaud peuvcnt causer un
Ce groupe de symboles signifie Mise en garde ! Soyez vigilant ! Il y a des risques de danger reliés aux CHOCS ÉLECTRIQUES, aux PIÈCES EN MOUVE-
MENT et aux PIÈCES CHAUDES. Reportez-vous aux symboles et aux directives ci-dessous afin de connaître les mesures à prendre pour éviter tout danger.
UNE DÉCHARGE ÉLECTRIQUE peut
entraîner la mort.
Le fait de toucher à une pièce électrique sous
tension peut donner une décharge fatale ou entraî-
ner des brûlures graves. Le chalumeau et le circuit
poste est sous tension. L’alimentation d’entrée et les circuits internes
de l’appareil le sont également. Le coupage au plasma d’arc exige des
tensions plus élevées que le soudage pour amorcer et maintenir l’arc
(souvent de 200 à 400 V CC), c’est pourquoi on fait appel à des
chalumeaux conçus avec un système de verrouillage sécuritaire qui
met l’appareil hors tension lorsque la capsule anti–feu est desserrée
ou si le tube touche l’électrode à l’intérieur de la buse. Un poste
incorrectement installé ou inadéquatement mis à la terre constitue un
danger.
D Ne touchez pas aux pièces électriques sous tension.
D Portez des gants isolants et des vêtements de protection secs et
sans trous.
D Isolez–vous d e l a p i èce à couper et du sol en utilisant des housses
ou des tapis assez grands afin d’éviter tout contact physique avec
la pièce à couper ou le sol.
D Ne touchez pas aux pièces du chalumeau si vous êtes en contact
avec la pièce à couper ou le sol.
D Mettez l’appareil hors tension avant d’effectuer la vérification, le
nettoyage ou le changement d’une pièce du chalumeau.
D Coupez l’alimentation d’entrée avant d’installer l’appareil ou d’ef-
fectuer l’entretien. Verrouillez ou étiquetez la sortie d’alimentation
selon la norme OSHA 29 CFR 1910.147 (reportez–vous aux Princi-
pales normes de sécurité).
D Installez l e poste correctement et mettez–le à la terre convenable-
ment selon les consignes du manuel de l’opérateur et les normes
nationales, provinciales et locales.
D Assurez–vous que le fil de terre du cordon d’alimentation est cor-
rectement reliéà la borne de terre dans la boîte de coupure ou que
la fiche du cordon est branchée à une prise correctement mise à la
terre – vous devez toujours vérifier la mise à la terre.
D Avant d’effectuer les connexions d’alimentation, vous devez relier
le bon fil de terre.
D Vérifiez f r équemment le cordon d’alimentation afin de vous assurer
qu’il n’est pas altéré ou à nu, remplacez–le immédiatement s’il l’est.
Un fil à nu peut entraîner la mort.
D L’équipement doit être hors tension lorsqu’il n’est pas utilisé.
D Vérifiez et remplacez les cosses du câble du chalumeau si elles
sont usées ou altérées.
D Le câble du chalumeau ne doit pas s’enrouler autour de votre corps.
D Si les normes le stipulent, la pièce à couper doit être mise à la terre.
D Utilisez uniquement de l’équipement en bonne condition. Réparez
ou remplacez immédiatement toute pièce altérée.
D Portez un harnais de sécurité si vous devez travailler au–dessus du
sol.
D Assurez–vous que tous les panneaux et couvercles sont correcte-
ment en place.
D N’essayez pas d’aller à l’encontre des systèmes de verrrouillage
de sécurité ou de les contourner.
D Utilisez uniquement le ou les chalumeaux recommandés dans le
manuel de l’opérateur.
de masse sont automatiquement actifs lorsque le
OM-928 Page 5
Page 10
D N’approchez pas le tube du chalumeau et l’arc pilote lorsque la gâchette est
enfoncée.
D Le câble de masse doit être pincé correctement sur la pièce à couper, métal
contre métal (et non de telle sorte qu’il puisse se détacher), ou sur la table
de travail le plus près possible de la ligne de coupage.
D Isoler la pince de masse quand pas mis à la pièce pour éviter le contact
avec tout objet métallique.
Il y a DU COURANT CONTINU IMPORTANT dans
les convertisseurs après la suppression de l’ali-
mentation électrique.
D Arrêter les convertisseurs, débrancher le courant électrique, et décharger
les condensateurs d’alimentation selon les instructions indiquées dans la
partie entretien avant de toucher les pièces.
LES ÉTINCELLES VOLANTES risquent de provoquer des blessures.
Le coupage plasma produit des étincelles et projections de
métal à très haute température. Lorsque la pièce refroidit,
du laitier peut se former.
D Portez une visière ou des lunettes de sécurité avec des écrans latéraux ap-
prouvées.
D Portez des vêtements de protection adéquats afin de protéger votre peau.
D Ayez recours à des protège–tympans ou à un serre–tête ignifuges afin
d’éviter que les étincelles n’entrent dans vos oreilles.
LES RAYONS D’ARC peuvent entraîner des brûlures aux yeux et à la
peau.
Les rayons d’arc provenant du procédé de coupage
(ultraviolets et infrarouges) qui peuvent entraîner des brûlures aux yeux et à la
peau.
D Lorsque vous coupez ou regardez quelqu’un couper, portez un masque ou
un écran facial avec le filtre approprié. La norme ANSI Z49.1 (reportez–
vous aux Principales normes de sécurité) suggère d’utiliser un filtre de
teinte nd 9 (nd 8 étant le minimum) pour tout travail de coupage faisant ap-
pel à un courant de moins de 300 A. On mentionne également dans la
norme Z49.1 qu’un filtre plus faible peut être utilisé lorsque l’arc est caché
par la pièce à couper. Comme cela est habituellement le cas pour les travaux de coupage à faible courant, les teintes énumérées au tableau 1 sont
fournies à titre d’information pour l’opérateur.
D Porter des lunettes de sécuritéà coques latérales sous votre casque ou
écran facial.
D Ayez recours à des écrans protecteurs ou à des rideaux pour protéger les
autres contre les rayonnements et les éblouissements; prévenez toute
personne sur les lieux de ne pas regarder l’arc.
D Portez d e s v êtements confectionnés avec des matières résistantes et igni-
fuges (cuir et laine) et des bottes de protection.
Tableau 1. Protection des yeux pour le coupage au plasma d’arc
Intensité de courant en ampèresFiltre de teinte (minimum)
produisent des rayons visibles et invisibles intenses
Moins de 20no. 4
20 – 40no. 5
40 – 60no. 6
60 – 80no. 8
LE BRUIT peut endommager l’ouïe.
Certaines applications de coupage produisent un bruit
constant, ce qui peut endommager l’ouïe si le niveau
sonore dépasse les limites permises par l’OSHA (reportez–vous aux Principales normes de sécurité).
D Utilisez des protège–tympans ou un serre–tête antibruit si le niveau sonore
est élevé.
D Prévenez toute personne sur les lieux du danger relié au bruit.
LES FUMÉES ET LES GAZ peuvent
être dangereux.
Le coupage produit des vapeurs et des gaz. Respirer
ces vapeurs et ces gaz peut être dangereux pour la
santé.
D Ne mettez pas votre tête au–dessus des vapeurs. Ne respirez pas ces va-
peurs.
D Si vous êtes à l’intérieur au moment du coupage, ventilez la pièce ou ayez
recours à une ventilation aspirante installée près de l’arc pour évacuer les
vapeurs et les gaz.
D Si la ventilation est médiocre, utilisez un respirateur anti–vapeurs
approuvé.
D Veuillez lire le Material Safety Data Sheets (MSDS) et les instructions du
fabricant pour obtenir plus de renseignements sur les métaux à couper, les
enrobages et les nettoyants.
D Travaillez dans un espace restreint uniquement s’il est bien ventilé ou si
vous portez un respirateur anti–vapeurs. Les vapeurs causées par le coupage et l’épuisement de l’oxygène peuvent altérer la qualité de l’air et
entraîner des blessures ou la mort. Assurez–vous que l’air ambiant est sain
pour la santé.
D Ne coupez pas dans un endroit près d’opérations de décapage, de net-
toyage ou de vaporisation. La chaleur et les rayons d’arc peuvent réagir
avec les vapeurs et former des gaz hautement toxiques et irritants.
D Ne coupez pas des métaux enrobés tels que des métaux galvanisés,
contenant du plomb ou de l’acier plaqué au cadmium, à moins que l’enroba-
ge ne soit ôté de la surface du métal à couper, que l’endroit où vous
travaillez ne soit bien ventilé, ou, si nécessaire, que vous ne portiez un res-
pirateur anti–vapeurs. Les enrobages ou tous métaux qui contiennent ces
éléments peuvent créer des vapeurs toxiques s’ils sont coupés.
D Ne coupez pas de contenants qui renferment ou ont renfermés des matiè-
res toxiques ou réactives – vous devez en premier lieu les vider et les
nettoyer convenablement.
LE PLASMA D’ARC peut entraîner
des blessures.
La chaleur dégagée par le plasma d’arc peut entraîner de
sérieuses brûlures. La force de l’arc est un facteur qui
s’ajoute au danger de brûlures. La chaleur intense et la
puissance de l’arc peuvent rapidement passer au travers
de gants et de tissus.
D N’approchez pas le tube du chalumeau.
D Ne saisissez pas la pièce à couper près de la ligne de coupage.
D L’arc pilote peut causer des brûlures – n’approchez pas le tube du chalu-
meau lorsque vous avez appuyé sur le gâchette.
D Portez des vêtements de protection adéquats qui recouvrent tout votre
corps.
D Ne pointez pas le chalumeau en direction de votre corps ni de la pièce à
couper lorsque vous appuyez sur la gâchette – l’arc pilote s’allume automa-
tiquement.
D Mettez l ’alimentation hors tension et débranchez le cordon d’alimentation
avant de démonter le chalumeau ou de changer une pièce du chalumeau.
D Utilisez uniquement le ou les chalumeaux recommandés dans le manuel
de l’opérateur.
LES BOUTEILLES peuvent exploser
si elles sont endommagées.
Les bouteilles de gaz contiennent du gaz sous haute
pression. Si une bouteille est endommagée, elle peut
exploser. Puisque les bouteilles de gaz font habituellement
partie d’un processus de travail des métaux, assurez–vous
de les manipuler correctement.
D Protégez les bouteilles de gaz comprimé contre la chaleur excessive, les
chocs mécaniques, le laitier, la flamme, les étincelles et l’arc.
D Installez et attachez les bouteilles dans la position verticale à l’aide d’une
chaîne, sur un support stationnaire ou un châssis porte–bouteille afin de
prévenir qu’elles ne tombent ou ne basculent.
D Les bouteilles ne doivent pas être près de la zone de coupage ni de tout
autre circuit électrique.
D Un contact électrique ne doit jamais se produire entre un chalumeau de
plasma d’arc et une bouteille.
D Ne coupez jamais sur une bouteille pressurisée – une explosion en
résulterait.
D Utilisez uniquement des bouteilles de gaz, des détendeurs, des boyaux et
des raccords conçus pour l’application déterminée. Gardez–les, ainsi que
toute autre pièce associée, en bonne condition.
D Détournez votre visage du détendeur–régulateur lorsque vous ouvrez la
soupape de la bouteille.
D Le couvercle du détendeur doit toujours être en place, sauf lorsque vous
utilisez la bouteille ou qu’elle est reliée pour usage ultérieur.
D Lisez et suivez les instructions sur les bouteilles de gaz comprimé, l’équi-
pement connexe et le dépliant P–1 de la CGA mentionné dans les
Principales normes de sécurité.
OM-928 Page 6
Page 11
1-3.Dangers supplémentaires en relation avec l’installation, le fonctionnement
et la maintenance
DES PIECES CHAUDES peuvent provoquer des brûlures graves.
D Ne pas toucher des parties chaudes à mains nues.
D Laisser refroidir avant d’intervenir sur la torche.
DES ORGANES MOBILES peuvent
provoquer des blessures.
D S’abstenir de toucher des organes mobiles tels que
des ventilateurs.
D Maintenir fermés et verrouillés les portes, panneaux,
recouvrements et dispositifs de protection.
DES PARTICULES VOLANTES
peuvent blesser les yeux.
D Porter des lunettes de sécurité avec protections laté-
rales ou frontales.
LES CHAMPS MAGNÉTIQUES peuvent affecter les stimulateurs cardiaques.
D Porteurs d e stimulateur cardiaque, restez à distance.
D Les porteurs sont priés de consulter leur médecin
avant d’approcher les opérations de coupage
plasma.
L’EMPLOI EXCESSIF peut
SURCHAUFFER L’ÉQUIPEMENT.
D Prévoir une période de refroidissement; respecter le
cycle opératoire nominal.
D Réduire l’ampérage (épaisseur) avant de continuer à
couper ou réduire le facteur de marche.
Danger D’EXPLOSION D’HY-
DROGÈNE.
D Lors du coupage d’aluminium partiellement ou totale-
ment immergé dans l’eau, de l’hydrogène libre peut
s’accumuler sous la pièce.
D Consultez votre ingénieur de coupage et les instruc-
tions de la table de coupage.
LA CHUTE DE L’APPAREIL peut
blesser.
D Utiliser l’anneau de levage uniquement pour soulever
l’appareil, NON PAS les chariot, les bouteilles de gaz
ou tout autre accessoire.
D Utiliser u n engin d’une capacité appropriée pour sou-
D En utilisant des fourches de levage pour déplacer l’unité, s’assurer que
les fourches sont suffisamment longues pour dépasser du côté opposé
de l’appareil.
lever l’appareil.
Risque D’INCENDIE OU
D’EXPLOSION.
D Ne pas placer l’appareil sur, au-dessus ou à proximité
de surfaces infllammables.
D Ne pas installer l’appareil à proximité de produits in-
flammables
D Ne pas surcharger l’installation électrique – s’assurer que l’alimentation est
correctement dimensionné et protégé avant de mettre l’appareil en service.
LES CHARGES ÉLECTROSTATI-
QUES peuvent endommager les circuits imprimés.
D Etablir la connexion avec la barrette de terre avant de
manipuler des cartes ou des pièces.
D Utiliser des pochettes et des boîtes antistatiques
pour stocker, déplacer ou expédier des cartes PC.
LE RAYONNEMENT HAUTE FRÉ-
QUENCE (H.F.) risque de provoquer
des interférences.
D Le Rayonnement haute frequence (H.F.) peut provo-
quer des interférences avec les équipements de ra-
dio–navigation et de communication, les services de
sécurité et les ordinateurs.
D Demander seulement à des personnes qualifiées familiarisées avec des
équipements électroniques de faire fonctionner l’installation.
D L’utilisateur est tenu de faire corriger rapidement par un électricien qualifié
les interférences résultant de l’installation.
D Si le FCC signale des interférences, arrêter immédiatement l’appareil.
D Effectuer régulièrement le contrôle et l’entretien de l’installation.
D Maintenir soigneusement fermés les portes et les panneaux des sources
de haute fréquence, maintenir les éclateurs à une distance correcte et utiliser une terre et et un blindage pour réduire les interférences éventuelles.
LE COUPAGE Ã L’ARC peut causer
des interférence.
D L’énergie électromagnétique peut gêner le fonction-
nement d’appareils électroniques comme des ordinateurs et des robots.
D Pour r éduire la possibilité d’interférence, maintenir les câbles aussi courts
que possible, les grouper, et les poser aussi bas que possible (ex. par
terre).
D Veiller à couper à une distance de 100 mètres de tout équipement électroni-
que sensible.
D S’assurer que la source de coupage est correctement branchée et mise à
la terre.
D Si l’interférence persiste, l’utilisateur doit prendre des mesures supplémen-
taires comme écarter la machine, utiliser des câbles blindés de des filtres,
ou boucler la zone de travail.
1-4.Principales normes de sécurité
Safety in Welding and Cutting, norme ANSI Z49.1, de l’American Wel-
ding Society, 550 N.W. Lejeune Rd, Miami FL 33126
Safety and Health Sandards, OSHA 29 CFR 1910, du Superintendent
of Documents, U.S. Government Printing Office, Washington, D.C.
20402.
Recommended Safe Practice for the Preparation for Welding and Cutting of Containers That Have Held Hazardous Substances, norme A WS
F4.1, de l ’American Welding Society, 550 N.W. Lejeune Rd, Miami FL
33126
National Electrical Code, NFPA Standard 70, de la National Fire Protection Association, Batterymarch Park, Quincy, MA 02269.
Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1,
de la Compressed Gas Association, 1235 Jefferson Davis Highway,
Suite 501, Arlington, VA 22202.
Règles de s écurité en soudage, coupage et procédés connexes, norme
CSA W117.2, de l’Association canadienne de normalisation, vente de
normes, 178 Rexdale Boulevard, Rexdale (Ontario) Canada M9W 1R3.
Safe Pra ctices For Occupation And Educational Eye And Face Protection, norme ANSI Z87.1, de l’American National Standards Institute,
1430 Broadway, New Y ork, NY 10018.
Cutting and Welding Processes, norme NFPA 51B, de la National Fire
Protection Association, Batterymarch Park, Quincy, MA 02269.
OM-928 Page 7
Page 12
1-5.Information sur les champs électromagnétiques
Données sur le soudage électrique et sur les ef fets, pour l ’organisme,
des champs magnétiques basse fréquence
Le courant de soudage ou de coupage passant dans les câbles de puis-
sance crée des causera des champs électromagnétiques. Il y a eu et
il y a encore un certain souci à propos de tels champs. Cependant,
après avoir examiné plus de 500 études qui ont été faites pendant une
période d e recherche de 17 ans, un comité spécial ruban bleu du Natio-
nal Research Council a conclu: “L’accumulation de preuves, suivant le
jugement du comité, n’a pas démontré que l’exposition aux champs ma-
gnétiques et champs électriques à haute fréquence représente un
risque à la santé humaine”. Toutefois, des études sont toujours en cours
et les preuves continuent à être examinées. En attendant que les
conclusions finales de la recherche soient établies, il vous serait souhaitable de réduire votre exposition aux champs électromagnétiques
pendant le soudage ou le coupage.
Afin de réduire les champs électromagnétiques dans l’environnement
de travail, respecter les consignes suivantes :
1 Garder les câbles ensembles en les torsadant ou en les
attachant avec du ruban adhésif.
2 Mettre tous les câbles du côté opposé de l’opérateur.
3 Ne pas courber pas et ne pas entourer pas les câbles autour de
vous.
4 Garder le poste de soudage et les câbles le plus loin possible de
vous.
5 Relier la pince de masse le plus près possible de la zone de
soudure.
Consignes relatives aux stimulateurs cardiaques :
Les consignes mentionnées précédemment font partie de celles destinées aux personnes ayant recours à un stimulateur cardiaque. Veuillez
consulter votre médecin pour obtenir plus de détails.
OM-928 Page 8
Page 13
SECTION 2 – INSTALLATION
2-1.Specifications For Power Source
A. AirForce 250 Specifications (Non-Compressor Unit)
Primary
Volts
12017.66 (0.25*)20A110121.682.120.80335
*While idling
B. AirForce 250A Specifications (Built-In Compressor Unit)
Primary
Volts
12020.32 (0.25*)20A110122.012.440.82353
*While idling
**10% High line condition
2-2. Specifications For Torch
Air-cooled torch for plasma arc cutting (PAC)
Primary
Amperes
Primary
Amperes
Primary Service
(Recommended)
Primary Service
(Recommended)
Secondary
Volts (DC)
Secondary
Volts (DC)
Secondary
Amperes
Secondary
Amperes
KWKVA
KWKVA
Power
Factor
Power
Factor
Max
OCV
(DC)
Max**
OCV
(DC)
35% duty cycle
Gas flow/pressure: 1 SCFM (28.3 L/min) at 50 PSI (345 kPa)
Safety interlock devices shut down power source
Safety trigger guard
Cutting capacity: see Section 2-1
OM-928 Page 9
Page 14
2-3.Duty Cycle And Overheating
3-1/2 Minutes Cutting6-1/2 Minutes Resting
Overheating
Duty Cycle is percentage of 10 mi n utes that unit can cut at rated load
without overheating.
If unit overheats, thermostat(s)
opens, output stops, Temperature
trouble light goes On, and cooling
fan runs. Wait fifteen minutes for
unit to cool or temperature light to
go off. Reduce amperage or duty
cycle before cutting or gouging.
Y Exceeding duty cycle can
damage unit and void
warranty.
2-4. Torch Dimensions And Weight
1 in
(25 mm)
3.0 lb (1.4 kg)
0
Minutes
1-3/8 in
(35 mm)
15
duty1 4/95 – 802 588-A
8-3/8 in
(213 mm)
Ref. 801 397-A
OM-928 Page 10
Page 15
2-5.Selecting A Location
6-3/4 in
(171 mm)
Dimensions And Weight
42 lb (19.1 kg)
Movement
Location And Airflow
17 in
(432 mm)
18 in
(457 mm)
1
1 Lifting Handle
Use handle to lift unit.
2
2 Hand Cart
Use cart or similar device to move
unit.
3 Plate Label
Use label to determine input power
needs.
4 120 VAC Receptacle
SERIAL NO.
STOCK NO.
VOLTS
AMPERES
INPUT
PHASE
HERTZ
VOLTS
AMPERES
OUTPUT
DUTY CYCLE %
EVIDENCE OF LABEL TAMPERING VOIDS WARRANTY
MAX OCV
3
4
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 2 0 .
10 in
(254 mm)
2-6.Connecting Work Clamp
2
10 in
(254 mm)
loc_2 3/96 - Ref. 802 588-A / 802 589-A
1
1 Work Clamp
2 Workpiece
Connect work clamp to a clean,
paint-free location on workpiece, as
close to cutting area as possible.
802 463-A
OM-928 Page 11
Page 16
2-7.Connecting Input Power
Check input voltage available at
site.
1 Grounded Receptacle
2
1
A 120 volt, 20 ampere individual
branch circuit protected by
time-delay fuses or circuit breaker
is required (see Section 2-1).
2 Plug From Unit
Select extension cord of 12 AWG
for up to 75 ft (23 m) or 10 AWG for
up to 140 ft (46 m).
Y Special installation may be
required where gasoline or
volatile liquids are present –
see NEC Article 511 or CEC
Section 2 0 .
2-8.Connecting Input Air Supply (AirForce 250 Only)
1
802 589-A
1 Air Inlet 1/4 in NPT
Recommended air pressure is 80 to
hose size: 1/4 in (6.4 mm) ID at
a maximum length of 50 ft (15.2
m) from source of air supply.
OM-928 Page 12
802 590-A
Page 17
SECTION 3 – OPERATION
3-1.Controls For AirForce 250 (Non-Compressor Unit)
1
OFF
ON
1 Power Switch
2 Power Light
Use light to tell if unit is energized and ready
to operate. Light goes off if input power is not
with specified range (see trouble light information).
2
POWER
PRESSURE
CUP
TEMP
INPUT VOLTAGE
3
3 Trouble Light
Trouble light comes on for the following
conditions:
a If inlet pressure is too low.
b If cup is removed from torch (unit
power must be turned off and back
on again)
198 837
cIf unit overheats
d If input power is not within
specification [93 to 137 vac (nonCE models), 186 to 274 vac (CE
models)]. I f input power is outside of
specified range, cycle power by
placing the power switch in the off
position and back on again. Check
input power if problem continues.
3-2.Controls For AirForce 250A (Built-In Compressor Unit)
1
OFF
ON
1 Power Switch
2 Power Light
Use light to tell if unit is energized and ready
to operate. Light goes off if input power is not
with specified range (see trouble light information).
3 Trouble Light
Trouble light comes on for the following
conditions:
a If cup is removed from torch (unit
2
POWER
CUP
TEMP
INPUT VOLTAGE
3
power must be turned off and back
on again)
196 630
b If unit overheats
cIf input power is not within
specification (93 to 137 vac). If input
power is outside of specified range,
cycle power by placing the power
switch in the of f position and back on
again. Check input power if problem
continues.
OM-928 Page 13
Page 18
3-3.Cutting Speed
Recommended production cutting speed vs. material thickness is approximately 10 ipm at 1/8 in (3.2 mm) mild steel thickness at max setting.
The cutting speed curve shows the
recommended maximum cutting
speed capabilities of the power
source and torch for mild steel of
various thickness.
The best cut quality is achieved by
cutting near the chart line. Cutting
below the line (too slow) will result
in excess dross. Cutting above the
line (too fast) will cause blowback
and lack of penetration.
3-4.Trigger Safety Lock
Trigger LockedTrigger Unlocked
1 Trigger
1
801 545-A
OM-928 Page 14
Page 19
3-5. Sequence Of Operation
EXAMPLE Of Cutting Operation
For shielded cutting, place drag shield on
edge of metal. For non-shielded cutting,
use 1/8 in (3.2 mm) standoff distance
(dragging tip will reduce tip life).
. Moisture from the compressor will form in the air line and at
the torch. It will be normal to sometimes see moisture come
out the end of the torch.
The pilot arc starts immediately when trigger is pressed.
Raise trigger lock and press
trigger. Pilot arc starts.
After cutting arc starts, slowly
start moving torch across metal.
Adjust torch speed so
sparks go thru metal and
out bottom of cut.
Pause briefly at end of
cut before releasing trigger.
Postflow continues for approx. 12 seconds
after releasing trigger; cutting arc can be in-
stantly restarted during postflow by raising
trigger lock and pressing trigger.
801 400-A
OM-928 Page 15
Page 20
SECTION 4 – MAINTENANCE & TROUBLESHOOTING
4-1.Routine Maintenance
Replace
Cracked
Parts
Each Use
Check
Torch Tip,
Electrode,
And Shield
Cup
Every Week
Check
Shield C u p
Shutdown
System
3 Months
Y Disconnect power
before maintaining.
Replace
Damaged Or
Unreadable
Labels
Torch Body, Cable
. Maintain more often
during severe conditions.
Check Compressor Filter –
Clean With A Damp Cloth
Or Replace If Necessary
(Compressor Model Only)
Tape Torn
Outer
Covering
6 Months
Blow Out Or
Vacuum Inside
OM-928 Page 16
Page 21
4-2.Overload Protection
A. Trouble Light And Checking Shield Cup Shutdown System For AirForce 250 (Non-Compressor Unit)
If certain problems occur, the
trouble light comes on, and output
stops.
1 Trouble Light
a Lights if inlet pressure is
too low.
1
PRESSURE
CUP
TEMP
INPUT VOLTAGE
Checking Torch Shield Cup Shutdown System
Power source Power switch must be reset whenever cup shutdown
system is activated. Always turn Off power source when changing or
checking consumables.
2
b Lights if shield cup is loose.
Turn power Off, and check
shield cup connection
(see Item 2 below). Power
must be reset whenever
the cup shutdown is
activated.
Check shield cup
shutdown system once a
week.
cLights if power source
overheats (see Sections
2-3 and 2-5).
d Lights if input power is not
within specification (93 to
137 vac). Power must be
reset whenever the input
voltage shutdown is
activated.
2 Torch Shield Cup
Turn Power On and loosen shield
cup. If shutdown system works
properly, trouble light comes on. If
not, turn power Off and check for
loose shield cup.
Check consumables (see Sections
4-5 and Parts List).
If system works properly, r etighten
cup and reset power.
Ref. 198 837 / Ref. 801 300-A
OM-928 Page 17
Page 22
B. Trouble Light And Checking Shield Cup Shutdown System For AirForce 250A (Built-In Compressor Unit)
If certain problems occur, the
trouble light comes on, and output
stops.
1 Trouble Light
a Lights if shield cup is loose.
Turn power Off, and check
1
CUP
TEMP
INPUT VOLTAGE
Checking Torch Shield Cup Shutdown System
Power source Power switch must be reset whenever cup shutdown
system is activated. Always turn Off power source when changing or
checking consumables.
shield cup connection
(see Item 2 below). Power
must be reset whenever
the cup shutdown is
activated.
Check shield cup
shutdown system once a
week.
b Lights if power source
overheats (see Sections
2-3 and 2-5).
cLights i f input power is not
within specification (93 to
137 vac). Power must be
reset whenever the input
voltage shutdown is
activated.
2 Torch Shield Cup
Turn Power On and loosen shield
cup. If shutdown system works
properly, trouble light comes on. If
not, turn power Off and check for
loose shield cup.
Check consumables (see Sections
4-5 and Parts List).
If system works properly, r etighten
cup and reset power.
2
Ref. 196 630 / Ref. 801 300-A
OM-928 Page 18
Page 23
4-3.Torch And Work Cable Connections For AirForce 250 (Non-Compressor Unit)
If torch or work cable needs to be
removed or replaced, proceed as
follows:
Turn power Off, and disconnect
input power plug from receptacle.
Connect female friction terminal on
end of white leads to RC11/ELECT
WHITE.
6 Female And Male Friction
Terminal RC7/PILOT RED
Connect female friction terminal on
end red leads to RC7/PILOT RED.
Tighten strain relief nut.
Tighten strain relief around cable.
Work Cable Connections
Remove existing work cable from
unit.
7 Strain Relief
. Be sure to allow some work
cable slack inside the unit.
Insert work clamp lead through
strain relief, and install strain relief
into front panel.
8 Work Lead Male Friction
4
586
Terminal
Connect work clamp lead to male
friction terminal labeled WORK
LEAD on circuit board PC1. Route
lead along torch lead bundle.
Tools Needed:
OM-928 Page 20
5/8 in
Ref. 801 300-B / Ref. 802 464-A / 199 088
Page 25
4-5. Checking/Replacing Retaining Cup, Tip, And Electrode
Overtightening will strip threads. Do not overtighten retaining cup during
assembly. Do not cross-thread parts causing stripping. Use care during torch
assembly and parts replacement.
Inspect shield cup, tip, and electrode for wear before cutting or whenever cutting speed has been significantly
reduced. Do not operate torch without a tip or electrode in place. Be sure to use genuine replacement parts.
A good practice is to replace both the tip and electrode at the same time.
Turn Off power source before checking torch parts.
Make sure this area is clean of
any debris.
Make sure swirl ring is clean of any
debris and no holes are
obstructed.
4
3
New
Worn
Turn Off power source.
1 Shield Cup
2 O-Ring
Remove shield cup. Check cup for cracks,
and replace if necessary .
Check O-ring for cracks or worn spots, re-
place shield cup if necessary.
3Tip
4 Opening
8
6
7
1
2
Remove tip. Check tip, and replace if opening is deformed or 50% oversize. If inside of
tip is not clean and bright, clean with steel
wool. Be sure to remove any pieces of steel
wool afterwards.
5 Electrode
Check electrode. If center has a pit more
than a 1/16 in (2 mm) deep, remove and replace electrode.
6 Swirl Ring
5
New
1/16 in
(2 mm)
Pit
Worn
802 465
7 O-Ring
Remove swirl ring. Check ring, and replace
if side holes are plugged.
Check O-ring for cracks or worn spots,
replace swirl ring if necessary.
8 O-Ring
Check O-ring for cracks or worn spots, and
replace if necessary.
Carefully reassemble parts in reverse order.
OM-928 Page 21
Page 26
4-6.Troubleshooting Power Source
Is input power
connected to
correct line
voltage?
Connect unit to proper input
No
voltage. (see Section 2-7).
Is compressor
operating?
*
Momentarily press torch
trigger and listen for gas/air
valve operation. Check for
No
Postflow air at torch. Check
Control board PC1, air filter,
and gas/air connections to
PC1 and torch.
Yes
Is Power
switch in the
On position?
Yes
Is the cooling
fan running?
Yes
Place Power switch in the
No
On position. (see Section
3-2).
*
Check Power switch S1,
No
relay CR2, and thermistor
R1.
Yes
Does pilot arc
ignite?
Yes
Does pilot arc
transfer to
workpiece?
Yes
Press torch trigger and
check if pilot arc ignites.
Place torch near workpiece
and check if pilot arc “jumps”
or transfers to workpiece.
No
Check work clamp connection. *Check Control board
PC1 and connections, and
torch and its connections.
Is Power light
On?
Yes
Is Trouble
light On?
OM-928 Page 22
No
*
Reset Power switch S1 and
No
verify line power voltage.
Check relay CR2, thermistor
R1, and Control board PC1.
Check torch consumables.
Yes
Reset Power switch S1. If
unit is overheated, wait
while fan cools down unit
temperature.
Check all connections,
Check main transformer T1,
Check inductor L1. Return
to beginning of chart.
*Servicing procedure to be performed
only by authorized Service Station.
Page 27
4-7. Troubleshooting Torch
Does arc go
on and off
while cutting?
No
Does arc go out
while cutting?
Yes
Yes
Torch travel speed too slow;
increase travel speed (see
Section 3-3). Clean or
replace torch consumables
as necessary (see Section
4-5). Be sure work clamp is
securely attached to
workpiece.
Be sure work clamp is
securely attached to workpiece. Make sure drag
shield contacts metal while
cutting. Clean or replace
torch consumables as
necessary (see Section
4-5).
Go to Section 4-6.
Go to Section 4-6.
No
Do sparks come
out of top of cut;
or cut is not
clean?
No
Is Trouble light
On; unit has no
cutting output?
No
Go to Section 4-6.
Yes
Yes
Torch travel speed too fast;
reduce travel speed (see
Section 3-3). Clean or
replace torch consumables
as necessary (see Section
4-5). Be sure work clamp is
securely attached to
workpiece. Unit not capable
of cutting metals thicker
than rating (see Section
2-1).
Check torch shield cup (see
Section B); reset unit Power
switch. *Check torch and
connections inside unit.
Go to Section 4-6.
*Servicing procedure to be performed
only by authorized Service Station.
OM-928 Page 23
Page 28
SECTION 5 – ELECTRICAL DIAGRAM
OM-928 Page 24
202 746
Figure 5-1. Circuit Diagram For AirForce 250 Power Source (Non-Compressor Unit)
Page 29
Figure 5-2. Circuit Diagram For AirForce 250A Power Source (Built-In Compressor Unit)
OM-928 Page 25
202 707
Page 30
. Hardware i s common and
not available unless listed.
SECTION 6 – PARTS LIST
2
1
27
28
26
3
23
22
19
20
21
18
24
25
4
5
6
7
9
10
12
29
8
11
OM-928 Page 26
13
17
14
15
16
Figure 6-1. Main Assembly For AirForce 250 Power Source (Non-Compressor Unit)
802 569-B
Page 31
Item
No.
Dia.
Mkgs.
Part
No.
Description
Figure 6-1. Main Assembly For AirForce 250 Power Source
(Non-Compressor Unit)
+When ordering a component originally displaying a precautionary label, the label should also be ordered.
♦Optional
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.
OM-928 Page 27
Page 32
. Hardware i s common and
not available unless listed.
2
1
31
32
27
26
23
24
25
22
28
29
30
13
3
4
5
6
7
9
10
12
33
8
11
Figure 6-2. Main Assembly For AirForce 250A Power Source (Built-In Compressor Unit)
OM-928 Page 28
21
20
19
18
17
16
15
14
802 591-B
Page 33
Item
No.
Dia.
Mkgs.
Part
No.
Description
Figure 6-1. Main Assembly For AirForce 250A Power Source
(Built-In Compressor Unit)
+When ordering a component originally displaying a precautionary label, the label should also be ordered.
♦Optional
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.
and CE markings only apply when the torch is used with shielded parts: retaining cup (197 567) and drag shield (196 929).
Retaining
Drag
Shield
196929
(For best performance,
Cup
197567
Retaining
196928
use 1/8” stand-off
with this part)
196926
Cup
Tip
Electrode
196925
Swirl
Ring
196927
O-Ring
196935
Ref. 197 336-A
Figure 6-4. Consumable Parts For ICE-12C
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.
OM-928 Page 30
Page 35
Warranty Questions?
Call
1-877-HOBART1
for your local
Hobart distributor.
Service
Y ou 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 or
call 1-800-332-3281. The
expertise of the distributor
and Hobart is there to
help you, every step of
the way.
Effective October 1, 1999
5/3/1 WARRANTY applies to all Handler 135 and 175 models, Airforce 250, 250A, and 375
models, and Champion 10,000 models.This warranty also applies to the Beta-Mig 1800, Champ
1435, 2060, 8500 models, Ironman 250, Stickmate models, Tigmate models, and HSW-15 and
HSW-25 spot welder models effective with Serial No. KK200262 and newer.
This limited warranty supersedes all previous Hobart warranties and is exclusive with
Hobart products are serviced by Hobart or Miller Authorized Service Agencies.
LIMITED WARRANTY – Subject to the terms and conditions
below, Hobart/Miller Electric Mfg. Co., Appleton, Wisconsin,
warrants to its original retail purchaser that new Hobart
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 Hobart. 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, Hobart/Miller will
repair or replace any warranted parts or components that fail
due to such defects in material or workmanship. Hobart/Miller
must be notified in writing within thirty (30) days of such defect
or failure, at which time Hobart/Miller will provide instructions
on the warranty claim procedures to be followed.
Hobart/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 and Labor
* Original Main Power Rectifiers
* Transformers
* Stabilizers
* Reactors
* Rotors, Stators and Brushes
2. 3 Years — Parts and Labor
* Drive Systems
* PC Boards
* Idle Module
* Solenoid Valves
* Switches and Controls
* Spot Welder Transformer
3. 1 Year — Parts and Labor (90 days for industrial use)
* Motor-Driven Guns
* MIG Guns/TIG Torches
* Relays
* Contactors
* Regulators
* Water Coolant Systems
* HF Units
* Running Gear/Trailers
* Plasma Cutting Torches
* Remote Controls
* Replacement Parts (No labor)
* Accessories
* Field Options
(NOTE: Field options are coveredfor the
remaining warranty period of the product they are
installed in, or for a minimum of one year —
whichever is greater.)
4. Engines, batteries and tires are warranted separately by
the manufacturer.
no other guarantees or warranties expressed or implied.
Hobart’s 5/3/1 Limited Warranty shall not apply to:
1. Consumable components such as contact tips,
cutting nozzles, slip rings, drive rolls, gas diffusers,
plasma torch tips and electrodes, weld cables, and
tongs and tips, or parts that fail due to normal wear.
2. Items furnished by Hobart/Miller, but manufactured by
others, such as engines or trade accessories. These
items are cov ered by the manufacturer’s warranty, if an y.
3. Equipment that has been modified by any party other
than Hobart/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 o f
the specifications for the equipment.
HOBART 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 Hobart’s/Miller’s option: (1)
repair; or (2) replacement; or, where authorized in writing by
Hobart/Miller in appropriate cases, (3) the reasonable cost of
repair or replacement at an authorized Hobart/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. Hobart’s/Miller’s
option of repair or replacement will be F.O.B., Factory at
Appleton, Wisconsin, or F.O.B. at a Hobart/Miller authorized
service facility as determined by Hobart/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 HOBART/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 HOBART/MILLER IS
EXCLUDED AND DISCLAIMED BY Hobart/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.
hobart retail 4/00
Page 36
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
Resources Available
Always provide Model Name and Serial/Style Number.
To locate a Distributor,
retail or service location:
Call 1-877-Hobart1 or visit our website at
www.HobartWelders.com
For technical assistance:
Call 1-800-332-3281
Contact the Delivering Carrier for:
For assistance in filing or settling claims,
contact your distributor and/or equipment
manufacturer’s Transportation Department.
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
File a claim for loss or damage during
shipment.
Hobart Welding Products
An Ill inoi s Tool Works Company
600 West Main Street
Troy, OH 45373 USA
For Technical Assistance:
Call1-800-332-3281
For Literature Or Nearest Dealer:
Call 1-877-Hobart1
PRINTED IN USA 2000 Hobart Welding Products. 1/00
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