Miller SMITH EQUIPMENT HANDI-HEET User manual

File: Accessory
OM-263687C
2022−01
Processes
Oxy-Fuel
Soldering
Heating
OWNERS MANUAL
Handi-Heett
Acetylene/Atmospheric Air
Torch Systems

TABLE OF CONTENTS
SECTION 1 −SAFETY PRECAUTIONS - READ BEFORE USING 1..........
1-1. Symbol Usage 1..................................................
1-2. Welding, Cutting, Brazing, Heating Hazards 1.........................
1-3. California Proposition 65 Warnings 6.................................
1-4. Principal Safety Standards 6........................................
SECTION 2 −CONSIGNES DE SÉCURITÉ −LIRE AVANT TOUTE
UTILISATION 7.......................................................
2-1. Symboles utilisés 7................................................
2-2. Soudage, coupage, brasage, risques de surchauffe 7..................
2-3. Proposition californienne 65 Avertissements 14........................
2-4. Principales normes de sécurité 14...................................
SECTION 3 −INTRODUCTION 15.......................................
SECTION 4 −THE TORCH SYSTEM 15..................................
4-1. Torch 15.........................................................
4-2. Gases 15.........................................................
4-3. Tips 15...........................................................
4-4. Repairs/Replacement Of Hose 16...................................
SECTION 5 −USING THE TORCH 16....................................
5-1. Industrial-Type Cylinder Information 16...............................
5-2. Installing Regulator 16.............................................
5-3. Installing Hose 17.................................................
5-4. Activating The Regulators 17........................................
5-5. Adjusting Regulator Pressures And Purging The Hoses 17..............
5-6. Testing The Equipment For Leaks 17.................................
5-7. Selecting And Installing A Tip 18.....................................
5-8. Lighting Procedures 18.............................................
5-9. Extinguishing The Torch Flame 18...................................
5-10. Shutting Down The System 18......................................
SECTION 6 −TECHNICAL DATA 19.....................................
WARRANTY

OM-263687 Page 1
SECTION 1 −SAFETY PRECAUTIONS -
READ BEFORE USING
OXY FUEL 2022-01
Protect yourself and others from injury — read, follow, and
save these important safety precautions and operating in-
structions.
1-1. Symbol Usage
DANGER! −Indicates a hazardous situation which, if not
avoided, will result in death or serious injury. The possible
hazards are shown in the adjoining symbols or explained
in the text.
Indicates a hazardous situation which, if not avoided, could
result in death or serious injury. The possible hazards are
shown in the adjoining symbols or explained in the text.
NOTICE −Indicates statements not related to personal injury.
.Indicates special instructions.
This group of symbols means
Warning! Watch Out! ELECTRIC
SHOCK, MOVING PARTS, and
HOT PARTS hazards. Consult
symbols and related instructions below for necessary actions to avoid
these hazards.
1-2. Welding, Cutting, Brazing, Heating Hazards
The symbols shown in this section 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 informa-
tion found in the Principal Safety Standards. Read and follow
all Safety Standards.
Only qualified persons should install, operate, maintain, and
repair this equipment. A qualified person is defined as one
who, by possession of a recognized degree, certificate, or
professional standing, or who by extensive knowledge, train-
ing and experience, has successfully demonstrated the abili-
ty to solve or resolve problems relating to the subject matter,
the work, or the project and has received safety training to
recognize and avoid the hazards involved.
During operation, keep everybody, especially children, away.
Do not use this equipment unless you are trained in its proper
use or are under competent supervision. Follow the proce-
dures described in this manual every time you use the equip-
ment. Failure to follow these instructions can cause fire, ex-
plosion, asphyxiation, property damage, or personal injury.
This equipment must be used in accordance with all Federal,
State, and local regulations as well as DOT (Department of
Transportation) and CGA (Compressed Gas Association) reg-
ulations. Contact your gas supplier for more information on
the proper use of compressed gases.

OM-263687 Page 2
.In this document, the phrase “welding and cutting” also refers to oth-
er oxy-fuel operations like brazing and heating.
READ INSTRUCTIONS.
DRead and follow all labels and the Owner’s Manual carefully be-
fore installing, operating, or servicing equipment. Read the safety
information at the beginning of the manual and in each section.
DUse only genuine replacement parts from the manufacturer.
DPerform installation, maintenance, and service according to the
Owner’s Manuals, industry standards, and national, state, and
local codes.
HOT PARTS can burn.
DDo not touch hot parts bare handed.
DAllow cooling period before working on equipment.
DTo handle hot parts, use proper tools and/or wear heavy, insu-
lated welding gloves and clothing to prevent burns.
FUMES AND GASES can be hazardous.
Welding and cutting produces fumes and gases. Breathing these
fumes and gases can be hazardous to your health.
DKeep your head out of the fumes. Do not breathe the fumes.
DVentilate the work area and/or use local forced ventilation at the
flame to remove welding and cutting fumes and gases. Some gases
(natural gas and acetylene) are lighter than air and will collect in high
areas. Other gases (propane and butane) are heavier than air and
will collect in low areas. Heavier-than-air gases are more difficult to
diffuse and are more likely to accumulate. The recommended way
to determine adequate ventilation is to sample for the composition
and quantity of fumes and gases to which personnel are exposed.
DIf ventilation is poor, wear an approved air-supplied respirator.
DRead and understand the Safety Data Sheets (SDSs) and the
manufacturer’s instructions for adhesives, coatings, cleaners,
consumables, coatings, cleaners, degreasers, fluxes, and met-
als.
DWork in a confined space only if it is well ventilated, or while
wearing an air-supplied respirator. Always have a trained watch-
person nearby. Welding and cutting fumes and gases can dis-
place air and lower the oxygen level, causing injury or death. Be
sure the breathing air is safe. Test atmospheres in confined areas
for explosive and toxic gases before using oxy-fuel equipment.
DDo not weld or cut in locations near degreasing, cleaning, or
spraying operations. The heat from welding or cutting flame can
react with vapors to form highly toxic and irritating gases.
DDo not weld or cut on coated metals, such as galvanized, lead, or
cadmium-plated steel unless the coating is removed from the af-
fected area, the area is well ventilated, and while wearing an air-
supplied respirator. The coatings and any metals containing
these elements can give off toxic fumes if welded or cut.
DDo not weld or cut on sealed air conditioning or refrigeration sys-
tems unless all refrigerants have been removed from the system.

OM-263687 Page 3
DShut off compressed gas supply when not in use.
DAlways ventilate confined spaces or use approved air-supplied
respirator.
BUILDUP OF GAS can injure or kill.
Light rays from the welding and cutting process produce intense visible
and invisible (ultraviolet and infrared) rays that can burn eyes and skin.
Sparks fly off from the weld.
DWear approved face protection fitted with a proper shade of filter
lenses to protect your face and eyes from light rays and sparks
when welding, cutting, or watching (see ANSI Z49.1 and Z87.1
listed in Safety Standards).
DWear welding goggles, or wear welding helmet/welding face-
shield over approved goggles/safety glasses with side shields.
DUse protective screens or barriers to protect others from flash,
glare and sparks; warn others not to watch the welding or cutting.
DWear body protection made from leather or flame-resistant cloth-
ing (FRC). Body protection includes oil-free clothing such as
leather gloves, heavy shirt, cuffless trousers, high shoes, and a
cap.
LIGHT RAYS can burn eyes and skin.
Welding and cutting on closed containers, such as tanks, drums, or
pipes, can cause them to blow up. Sparks can fly off from the welding or
cutting operations. The torch flame, flying sparks, hot workpiece, and
hot equipment can cause fires and burns. Check and be sure the area is
safe before doing any welding or cutting.
WELDING AND CUTTING can cause
fire or explosion.
DDo not use this welding and cutting equipment with gases and
pressures other than those for which it is intended. Oxygen is not
flammable; however, the presence of pure oxygen will drastically
increase the speed and force with which burning takes place. Oxy-
gen must never be allowed to contact grease, oil, or other petro-
leum-based substances; therefore, be sure there is no oil or grease
on the regulator, cylinder, valves, or equipment. Do not use petro-
leum-based pipe sealants. Do not use sealants on metal-to-metal
seals, such as hose and CGA cylinder connections; use
PTFE-based sealant (PTFE tape) on pipe threads. Do not use or
store near excessive heat (above 125°F/51.5°C) or open flame.
Do not refer to oxygen as air and do not use oxygen as a substitute
for compressed air. Do not use oxygen to clean clothes or work
area, for ventilation, or to operate pneumatic tools. Open oxygen
cylinder valves slowly. Be sure regulator adjusting handle is in the
full out (off) position before opening oxygen cylinder valve.
DInspect all equipment before use. Do not use damaged, defective,
or improperly adjusted welding and cutting equipment. Make sure
levers and valves work properly, threads on equipment are clean
(no grease or oil) and not deformed, gauges are intact and easy to
read, regulator is clean and free of oil or dirt, and fittings are prop-
erly sized for the cylinder. Make sure hoses are clean (no grease or
oil) and ferrules are properly installed so the fitting does not slip in-
side the hose. Be sure all connections are tight.

OM-263687 Page 4
DIt is recommended that a reverse-flow check valve or a flashback ar-
restor be installed between the torch handle and the regulator. Check
valves do not prevent the propagation of a flame upstream (flash-
back) but are designed to prevent the unintentional backflow of gases
into the cutting attachment, torch, hoses, or regulator which could
cause an explosion or fire. A flashback arrestor can be installed on the
torch handle instead of a check valve. Miller flashback arrestors have
a reverse flow check valve and prevent the propagation of a flame up-
stream. If a flashback arrestor is installed, a check valve is not neces-
sary. Using a flashback arrestor and a check valve can reduce gas
flow and affect torch operation. To help prevent the reverse flow of
gases, be sure the cylinders contain enough gas to complete the
work.
DUnderstand the properties and applications of a gas, and how to
safely use a gas, before placing it in service.
DPerform work only in an area with a fireproof floor (concrete). Do
not heat concrete because it can expand and explode violently.
DPerform work on a fireproof surface. Use heat resistant shields to
protect nearby walls and flooring.
DDo not use if grease or oil is present on equipment or if equipment is
damaged. Have equipment cleaned/repaired by a qualified person.
DDo not open a cylinder valve quickly or the regulator can be dam-
aged and cause a fire.
DDo not open acetylene cylinder valve more than 1−1/2 turns. (For
all gases except acetylene, open cylinder valve fully to backseal
the cylinder valve.) Keep cylinder wrench on the cylinder for quick
shut-off.
DDo not slightly open or “crack” fuel cylinder valve to blow debris
from the valve outlet. Remove the debris using nitrogen, air, or a
clean, oil-free rag.
DAlways purge gas from the system before lighting torch. Purge gas
in a well-ventilated area and away from flame or sparks.
DKeep torch flame or sparks away from cylinder, regulator, and gas
hose.
DUse only the gases recommended by the manufacturer of the
oxy-fuel equipment being used.
DNever light a torch with matches or a lighter. Always use a striker.
DDo not use acetylene above 15 psi (103 kPa) flowing. It is accept-
able to use acetylene regulators that indicate a static pressure up
to 22 psi (151 kPa).
DDo not withdraw acetylene from a cylinder at a rate exceeding 1/7
of the cylinder capacity per hour (50 SCFH for a 350 ft3cylinder).
Maximum withdrawal rate for a half-full 100 lb propane cylinder at
70°F is 75 SCFH (2124 lph).
DWhen required flows (SCFH) exceed the recommended withdrawal
rate from one cylinder, then additional cylinders must be manifolded to
provide safe and efficient operation.
DWhen using liquid oxygen, tips may require greater gas volume than a
single cylinder is capable of producing. External evaporators or mani-
folding multiple cylinders may be necessary to supply sufficient gas
flows.
DDo not use long gas hoses or hoses with multiple connections be-
cause they restrict gas flow and reduce gas pressure. These condi-
tions can cause backfires and flashbacks, and reduce equipment effi-
ciency.
DDo not use torch if you smell gas. Check oxy-fuel system for leaks
with an approved leak detection solution or leak detector. Never
test for gas leaks with a flame.

OM-263687 Page 5
DRemove all flammables within 35 ft (10.7 m) of the welding or cut-
ting operation. If this is not possible, tightly cover them with ap-
proved covers.
DDo not weld or cut where flying sparks can strike flammable
material.
DProtect yourself and others from flying sparks and hot metal.
DBe alert that welding and cutting sparks and hot materials from
welding and cutting can easily go through small cracks and open-
ings to adjacent areas.
DWatch for fire, and keep a fire extinguisher nearby.
DBe aware that welding or cutting on a ceiling, floor, bulkhead, or
partition can cause fire on the hidden side.
DDo not cut or weld on tire rims or wheels. Tires can explode if heat-
ed. Repaired rims and wheels can fail. See OSHA 29 CFR
1910.177 listed in Safety Standards.
DDo not weld or cut on containers that have held combustibles, or on
closed containers such as tanks, drums, or pipes unless they are
properly prepared according to AWS F4.1 (see Safety Standards).
DDo not weld or cut where the atmosphere can contain flammable
dust, gas, or liquid vapors (such as gasoline).
DWear body protection made from leather or flame-resistant cloth-
ing (FRC). Body protection includes oil-free clothing such as
leather gloves, heavy shirt, cuffless trousers, high shoes, and a
cap.
DDo not use fuel gases to clean clothes or work area.
DRemove any combustibles, such as a butane lighter or matches,
from your person before doing any welding or cutting.
DAfter completion of work, inspect area to ensure it is free of sparks,
glowing embers, and flames.
DFollow requirements in OSHA 1910.252 (a) (2) (iv) and NFPA 51B
for hot work and have a fire watcher and extinguisher nearby.
Compressed gas cylinders contain gas under high pressure. If
damaged, a cylinder can explode. Since gas cylinders are normally part
of the welding or cutting process, be sure to treat them carefully.
CYLINDERS can explode if damaged.
DProtect compressed gas cylinders from excessive heat, mechani-
cal shocks, physical damage, slag, open flames, and sparks.
DInstall cylinders in an upright position by securing to a stationary
support or cylinder rack to prevent falling or tipping. Do not lay acet-
ylene cylinders on their sides or acetone will flow out of the cylinder
and damage the equipment.
DKeep cylinders away from any arc welding, cutting, or other electri-
cal circuits.
DNever drape a welding or cutting torch over a gas cylinder.
DNever weld or cut on a pressurized cylinder −explosion will result.
DUse only correct compressed gas cylinders, regulators, hoses, and
fittings designed for the specific application; maintain them and as-
sociated parts in good condition. Do not use compressed gas cylin-
der unless an approved gas regulator is attached to the gas valve.
DTurn face away from valve outlet when opening cylinder valve. Do
not stand in front of or behind the regulator when opening the valve.
DKeep protective cap in place over valve except when cylinder is in
use or connected for use.
DUse the proper equipment, correct procedures, and sufficient num-
ber of persons to lift, move, and transport cylinders.
DStore compressed gas and oxygen cylinders in separate locations.
DStore empty cylinders with valves closed and caps in place.

OM-263687 Page 6
DDo not modify or repair cylinders or valves. Store leaking acetylene
cylinders outdoors in a safe area. Identify leaking cylinders and re-
turn them to the supplier.
DDispose of used disposable cylinders according to the manufactur-
er’s recommendations. Do not throw cylinders in fire.
DFollow instructions provided by the gas supplier and on com-
pressed gas cylinders, associated equipment, and in Compressed
Gas Association (CGA) publication P-1 listed in Safety Standards.
DWelding, cutting, chipping, wire brushing, and grinding cause
sparks and flying metal.
DWear welding goggles, or wear welding helmet/welding face-
shield over approved goggles/safety glasses with side shields.
FLYING METAL or DIRT can injure eyes.
1-3. California Proposition 65 Warnings
WARNING: This product can expose you to chemicals in-
cluding lead, which are known to the state of California to
cause cancer and birth defects or other reproductive harm.
For more information, go to www.P65Warnings.ca.gov.
1-4. Principal Safety Standards
Safety in Welding, Cutting, and Allied Processes, American Welding So-
ciety standard ANSI Standard Z49.1. Website: www.aws.org.
Safe Practices for the Preparation of Containers and Piping for Welding
and Cutting, American Welding Society Standard AWS F4.1. Website:
www.aws.org.
Recommended Practices for Safe Oxyfuel Gas Cutting Torch Operation,
American Welding Society Standard C4.2/C4.2M, and Recommended
Practices for Safe Oxyfuel Gas Heating Torch Operation, American
Welding Society Standard C4.3/C4.3M. Website: www.aws.org.
Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1,
from Compressed Gas Association. Website:www.cganet.com.
Acetylene, CGA Pamphlet G-1 from Compressed Gas Association.
Website:www.cganet.com).
Safety in Welding, Cutting, and Allied Processes, CSA Standard W117.2
from Canadian Standards Association.
Website: www.csagroup.org.
Safe Practice For Occupational And Educational Eye And Face Protec-
tion, ANSI Standard Z87.1 from American National Standards Institute.
Website: www.ansi.org.
Standard for Fire Prevention During Welding, Cutting, and Other Hot
Work, NFPA Standard 51B from National Fire Protection Association.
Website: www.nfpa.org.
OSHA Occupational Safety and Health Standards for General Industry, Title
29, Code of Federal Regulations (CFR), Part 1910.177 Subpart N, Part
1910 Subpart Q, and Part 1926, Subpart J. Website: www.osha.gov.
OSHA Important Note Regarding the ACGIH TLV, Policy Statement on
the Uses of TLVs and BEIs. Website: www.osha.gov.
Applications Manual for the Revised NIOSH Lifting Equation from the
National Institute for Occupational Safety and Health (NIOSH). Website:
www.cdc.gov/NIOSH.

OM-263687 Page 7
SECTION 2 −CONSIGNES DE SÉCURITÉ −LIRE
AVANT TOUTE UTILISATION
OXY FUEL 2022-01_fre
Pour écarter les risques de blessure pour vous−même et pour
autrui — lire, appliquer et ranger en lieu sûr ces consignes rel-
atives aux précautions de sécurité et au mode opératoire.
2-1. Symboles utilisés
DANGER! −Indique une situation dangereuse qui si on
l’évite pas peut donner la mort ou des blessures graves.
Les dangers possibles sont montrés par les symboles
joints ou sont expliqués dans le texte.
Indique une situation dangereuse qui si on l’évite pas peut
donner la mort ou des blessures graves. Les dangers possi-
bles sont montrés par les symboles joints ou sont ex-
pliqués dans le texte.
AVIS −Indique des déclarations pas en relation avec des blessures
personnelles.
.Indique des instructions spécifiques.
Ce groupe de symboles veut dire
Avertissement! Attention! DAN-
GER DE CHOC ELECTRIQUE,
PIECES EN MOUVEMENT, et
PIECES CHAUDES. Reportez−vous aux symboles et aux directives
ci−dessous afin de connaître les mesures à prendre pour éviter tout dan-
ger.
2-2. Soudage, coupage, brasage, risques de surchauffe
Les symboles représentés ci-dessous sont utilisés dans ce
manuel pour attirer l’attention et identifier les dangers possi-
bles. En présence de l’un de ces symboles, prendre garde et
suivre les instructions afférentes pour éviter tout risque. Les
consignes de sécurité présentées ci−après ne font que rés-
umer les informations contenues dans les principales
normes de sécurité. Lire et observer toutes les normes de
sécurité.
L’installation, l’utilisation, l’entretien et les réparations ne
doivent être confiés qu’à des personnes qualifiées. Une per-
sonne qualifiée est définie comme celle qui, par la possession
d’un diplôme reconnu, d’un certificat ou d’un statut profes-
sionnel, ou qui, par une connaissance, une formation et une
expérience approfondies, a démontré avec succès sa capac-
ité à résoudre les problèmes liés à la tâche, le travail ou le pro-
jet et a reçu une formation en sécurité afin de reconnaître et
d’éviter les risques inhérents.
Pendant le fonctionnement, maintenir à distance toutes les
personnes, notamment les enfants de l’appareil.
Ne pas utiliser cet équipement à moins d’avoir été formé à son
usage adéquat ou d’être sous la supervision d’une personne
qualifiée. Respecter les procédures décrites dans le présent
manuel pour toute utilisation de l’équipement. Le non−re-

OM-263687 Page 8
spect de ces procédures peut causer des risques d’incendie,
d’explosion, d’asphyxie, de dommages matériels ou de
blessures. Cet équipement doit être utilisé dans le respect de
toutes les réglementations fédérales, provinciales et munici-
pales, ainsi que celles du Ministère des Transports et de l’as-
sociation CGA (Compressed Gas Association). Pour plus
d’information sur l’utilisation adéquate de gaz comprimé,
communiquez avec votre fournisseur de gaz.
.Dans ce document, l’expression « soudage et coupage » fait ég-
alement référence à d’autres opérations oxy−combustibles comme
le brasage et le chauffage’
LIRE LES INSTRUCTIONS.
DLire et appliquer les instructions sur les étiquettes et le Mode
d’emploi avant l’installation, l’utilisation ou l’entretien de l’appareil.
Lire les informations de sécurité au début du manuel et dans
chaque section.
DN’utiliser que des pièces de remplacement provenant du fa-
bricant.
DEffectuer l’installation, l’entretien et toute intervention selon les
manuels d’utilisateurs, les normes nationales, provinciales et de
l’industrie, ainsi que les codes municipaux.
LES PIÈCES CHAUDES peuvent provoquer des
brûlures.
DNe pas toucher des parties chaudes à mains nues.
DLaissez refroidir avant d’intervenir sur l’équipement.
DNe pas toucher aux pièces chaudes, utiliser les outils recom-
mandés et porter des gants de soudage et des vêtements épais
pour éviter les brûlures.