Miller Gold Seal 160 i Owner`s manual

OM-189 116A
June 1999
Effective with Serial N°
230 Volt – 159 262
240 Volt – 160 261
Processes
TIG (GTAW) Welding
Stick (SMAW) Welding
Description
Arc Welding Power Source

Gold Seal 160 i
Visit our website at
www.MillerWelds.com
From Miller to You
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 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
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.
TABLE OF CONTENTS
The following terms are
used interchangeably
throughout this manual:
TIG = GTAW
Stick = SMAW
SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING . . . . . . . . .
1-1. Symbol Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2. Arc Welding Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3. Additional Symbols for Installation, Operation, and Maintenance . . . . . .
1-4. Principal Safety Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5. EMF Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 2 – INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2. Duty Cycle And Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3. Volt-Ampere Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-4. Selecting A Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-5. Typical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-6. Front Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-7. Weld Output Terminals And Selecting Cable Sizes . . . . . . . . . . . . . . . . . .
2-8. Electrical Service Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-9. Connecting Input Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 3 – OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1. Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 4 – MAINTENANCE AND TROUBLESHOOTING . . . . . . . . . . . . . . .
4-1. Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 5 – ELECTRICAL DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 6 – SELECTING AND PREPARING TUNGSTEN ELECTRODE . .
6-1. Selecting Tungsten Electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2. Safety Information About Tungsten . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3. Preparing Tungsten For DC Electrode Negative (DCEN) Welding . . . . .
SECTION 7 – GUIDELINES FOR TIG WELDING (GTAW) . . . . . . . . . . . . . . . .
7-1. Positioning The Torch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-2. Torch Movement During Welding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-3. Positioning Torch Tungsten For Various Weld Joints . . . . . . . . . . . . . . . .
SECTION 8 – PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WARRANTY
1
1
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3
3
4
5
5
5
6
6
7
7
8
8
9
10
10
10
10
11
12
14
14
15
15
16
16
16
17
18
Declaration of Conformity
Manufacturer’s Name:
ITW WELDING PRODUCTS ITALY S.r.l.
Manufacturer’s Address:
Via Privata Iseo, 6/E
20098 San Giuliano
Milanese, Italy
Declares that this product:
Gold SealR 160 i
Conforms to the following Directives and Standards:
Directives
Electromagnetic Compatibility Directives: 89/336/EEC
Low Voltage: 73/23/EEC
Machinery Directives: 89/392/EEC
And their amendments 91/368/EEC, 93/31/EEC, 93/44/EEC, 93/68/EEC
Standards
Electromagnetic compatibility (EMC) Product standard for arc welding equipment: EN50199: August 1995
Safety Requirements for Arc Welding Equipment Part 1: EN 60974-1: 1989
European Contact:
Telephone:
Fax:
dec_con1_italy11/02
Mr. Danilo Fedolfi, Managing Director
ITW WELDING PRODUCTS ITALY S.r.l.
Via Privata Iseo, 6/E
20098 San Giuliano
Milanese, Italy
39(02)98290-1
39(02)98290-203
SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING
som _nd_7/02
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.
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.
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 1-4. Read and follow all
Safety Standards.
D If earth grounding of the workpiece is required, ground it directly
with a separate cable.
Y Only qualified persons should install, operate, maintain, and
repair this unit.
D Wear a safety harness if working above floor level.
D Keep all panels and covers securely in place.
Y During operation, keep everybody, especially children, away.
D Clamp work cable with good metal-to-metal contact to workpiece
or worktable as near the weld as practical.
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
power circuit and machine internal circuits are also
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 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 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.
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 Keep your head out of the fumes. Do not breathe the fumes.
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 conductor 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 weld in locations near degreasing, cleaning, or spraying operations. The heat and rays of the arc can react with vapors to form
highly toxic and irritating gases.
D Do not drape cables over your body.
FUMES AND GASES can be hazardous.
Welding produces fumes and gases. Breathing
these fumes and gases can be hazardous to your
health.
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 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-189 116 Page 1
ARC RAYS can burn eyes and skin.
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 material (leather and wool) and foot protection.
BUILDUP OF GAS can injure or kill.
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.
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
workpiece, and hot equipment can cause fires and
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.
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.
OM-189 116 Page 2
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, mechanical 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 fittings 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.
1-3. Additional Symbols For Installation, Operation, And Maintenance
FIRE OR EXPLOSION hazard.
MOVING PARTS can cause injury.
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.
D Keep away from moving parts such as fans.
D Keep all doors, panels, covers, and guards
closed and securely in place.
FALLING UNIT can cause injury.
H.F. RADIATION can cause interference.
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.
D
OVERUSE can cause OVERHEATING
D
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.
D
D
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.
The user is responsible for having a qualified electrician promptly correct any interference problem resulting from the installation.
If notified by the FCC about interference, stop using the
equipment at once.
Have the installation regularly checked and maintained.
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.
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.
ARC WELDING can cause interference.
MOVING PARTS can cause injury.
D Keep away from moving parts.
D Keep away from pinch points such as drive
rolls.
D
D
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.
D
D
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.
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.
OM-189 116 Page 3
1-4. 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).
Boulevard, Rexdale, Ontario, Canada M9W 1R3 (phone:
800–463–6727 or in Toronto 416–747–4044, website: www.csa–international.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).
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).
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).
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).
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
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).
1-5. 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:
OM-189 116 Page 4
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.
SECTION 2 – INSTALLATION
2-1. Specifications
Rated Welding Output
160 A @ 16.4 Volts DC,
60% Duty Cycle
Amp
Range DC
5 – 160
Maximum
Open-Circuit
Voltage DC
IP Rating
90
IP22
Amperes Input at
Rated Load Output,
50/60 Hz, Single-Phase
230 V
240 V
18
17
KVA
Weight
4
33 lb
(15 kg)
Dimensions:
Height: 10-3/4 in (270 mm); Width: 9-1/8 in (230 mm); Length: 15-3/4 in (400 mm)
2-2. Duty Cycle And Overheating
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
duty cycle before welding.
Y Exceeding duty cycle can
damage unit and void
warranty.
60% Duty Cycle At 150 Amperes
6 Minutes Welding
4 Minutes Resting
Overheating
A
0
15
Minutes
OR
Reduce Duty Cycle
duty1 4/95
OM-189 116 Page 5
2-3. Volt-Ampere Curve
Volt-ampere curve shows minimum and maximum voltage and
amperage output capabilities of
unit.
802 276
2-4. Selecting A Location
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.
2
1
18 in
(460 mm)
18 in
(460 mm)
OM-189 116 Page 6
2-5. Typical Connections
A. Typical Stick (SMAW) Connections
B. Typical TIG (GTAW) Connections
2-6. Front Panel Connections
Gas Hose
Connector
Remote Contactor
And Current Control
Receptacle
OM-189 116 Page 7
2-7. Weld Output Terminals And Selecting Cable Sizes
Total Cable (Copper) Length In Weld Circuit Not Exceeding
100 ft (30 m) Or Less
Turn Off power before
connecting to weld output
receptacles.
150 ft
(45 m)
200 ft
(60 m)
250 ft
(70 m)
300 ft
(90 m)
350 ft
(105 m)
400 ft
(120 m)
Welding
Amperes
10 – 60%
Duty
Cycle
60 – 100%
Duty Cycle
100
4
4
4
3
2
1
1/0
1/0
150
3
3
2
1
1/0
2/0
3/0
3/0
200
3
2
1
1/0
2/0
3/0
4/0
4/0
250
2
1
1/0
2/0
3/0
4/0
2-2/0
2-2/0
Negative
10 – 100% Duty Cycle
Positive
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.
S-0007-D
2-8. Electrical Service Guide
Input Voltage
230
240
Input Amperes At Rated Output
18
17
Max Recommended Standard Fuse Or Circuit Breaker Rating In Amperes
30
30
Reference: 1997 National Electrical Code (NEC)
OM-189 116 Page 8
S-0092-J
2-9. Connecting Input Power
1
Rating Label
Supply correct input power. See
Section 2-8.
2
Line Disconnect Device
Check input voltage available at
site.
2
L1
L2
Y Always connect grounding
conductor first.
= GND/PE
1
1
OM-189 116 Page 9
SECTION 3 – OPERATION
3-1. Controls
1
2
3
2
1
3
4
5
7
6
3
50
2
4.5
12
35
65
8
15
t
11
1
10
%
5
90
18
s
3
20
A
100
2T
110
50
8
130
40
10
6
t
80
70
4T
80
5.5 20
s
0.3
1/
4
Machine On Indicator Light
Welding On Indicator Light
Thermal Cutout Warning
Indicator Light
4 Welding Current Control
5 Down Slope And Up Slope
Time Control
6 Base Current Control
7 Post-Gas time Control
8 Pulse Frequency Control
9 HF Or Lift-Arc Selector
10 Control Panel Or Remote
Control Selector
11 Function selector
(Electrode, 2T, 4T, Spot
Welding, Repeat Cycle)
t
145
20
8
5
160
6
4
0.5
20
35
50
130
220
300Hz
9
SECTION 4 – MAINTENANCE AND TROUBLESHOOTING
4-1. Routine Maintenance
. Maintain more often
Y Disconnect power
before maintaining.
during severe conditions.
3 Months
Repair Or
Replace
Cracked
Cables
Replace
Damaged Or
Unreadable
Labels
Replace Cracked
Torch Body
Repair Or Replace
Cracked Cables
And Cords
Clean
And
Tighten Weld
Connections
6 Months
Blow Out Inside
OM-189 116 Page 10
4-2. Troubleshooting
Trouble
No weld output; unit completely inoperative.
Remedy
Be sure Power switch is On (see Section 3-1).
Be sure line disconnect switch is On (see Section 2-9).
Check line fuse(s) and replace if necessary (see Sections 2-9).
Check for proper input power connections (see Sections 2-8 and/or 2-9).
No weld output; fan motor FM running
and pilot light on.
Thermostat(s) open (overheating). Allow fan to run; thermostat(s) closes when unit has cooled (see
Section 2-2).
Low weld output with no control.
Check position of Amperage Control (see Section 3-1).
Have Factory Authorized Service Agent check control board PC1.
Limited output and low open-circuit
voltage.
Check incoming power for correct voltage. Replace line fuse if open (see Section 2-9).
Check for proper input and output connections (see Sections 2-7 and/or 2-9).
Erratic or improper weld output.
Tighten all welding cable connections (see Sections 2-7).
Check for proper size and type of cable (see Section 2-7).
Check for proper input and output connections (see Sections 2-7 and/or 2-9).
Replace electrode.
Arc not forming when using Lift-Arc.
Check electrode and workpiece, clean as needed to allow good contact.
Fan motor FM does not run.
Check and clear blocked fan blade; be sure blade is secure on shaft.
Have Factory Authorized Service Agent check fan motor FM.
Wandering arc; poor control of arc direction.
Reduce gas flow rate.
Select proper size tungsten (see Section 6-1).
Properly prepare tungsten (see Sections 6-2 and 6-3).
Tungsten electrode oxidizing and not
remaining bright after conclusion of
weld.
Shield weld zone from drafts.
Increase postflow time.
Check and tighten all gas fittings.
Water in torch. Refer to torch Owner’s Manual for part(s) requiring replacement, and repair torch as
necessary.
OM-189 116 Page 11
SECTION 5 – ELECTRICAL DIAGRAMS
PCB1
S1
DL3
J4
S3
FM
1
PCB5
J5-J6
J7
J3-J4
J8
PCB2
BSI
BS2
1
1
J4
9V
J5
0
18V
40 1 2 3 4 5
0
230V
10
J2
1
18
XL
5 6
6
5
4
J4 3
2
1
J1
1 2 3 4
SH1
J2
J1
PCB3
PCB6
24V
J2
6 7 8
0
T2
Gs
A
B
D
E
C
J3
J4
J1
J2
RC1
J1
T1
J2
WORK
+
S-142 310
–
ELECTRODE
PCB4
Figure 5-1. Circuit Diagram For 230 Volt Input Models
R
230V
S
DL2
S2
Lift
SWR1
Weld. Overtemp.
Post Gas
I Weld.
GND
DL1
On
I1 - I2
R7
6 5 4 3 2 1
Arc Weld
Tig 4T
Tig 2T
Res. Tig
Spot W.
R6
Std/Rmt
0
RC1
OM-189 116 Page 12
R5
R
240V
S
PCB1
GND
DL1
On
S1
DL2
S2
Std/Rmt
DL3
Lift
S3
J4
FM
1
SWR1
Weld. Overtemp.
I Weld.
R7
Post Gas
Arc Weld
Tig 4T
Tig 2T
Res. Tig
Spot W.
R6
6 5 4 3 2 1
I1 - I2
R5
PCB5
J5-J6
J7
J3-J4
J8
PCB2
BSI
BS2
1
1
J4
240V
9V
J5
0
18V
40 1 2 3 4 5
0
0
10
J2
1
18
XL
5 6
6
5
4
J4 3
2
1
J1
1 2 3 4
SH1
J2
J1
PCB3
PCB6
24V
J2
6 7 8
0
T2
Gs
A
B
D
E
C
J3
J4
J1
J2
RC1
J1
T1
J2
WORK
+
–
ELECTRODE
PCB4
RC1
S-142 311
Figure 5-2. Circuit Diagram For 240 Volt Input Models
OM-189 116 Page 13
SECTION 6 – SELECTING AND PREPARING
TUNGSTEN ELECTRODE
gtaw2 7/97
NOTE
For additional information, see your distributor for a handbook on the Gas
Tungsten Arc Welding (GTAW) process. Wear clean gloves to prevent
contamination of tungsten electrode.
6-1. Selecting Tungsten Electrode
Amperage Range - Gas Type♦ - Polarity
Electrode Diameter
DC – Argon – Electrode Negative/Straight
Polarity
DC – Argon – Electrode Positive/Reverse
Polarity
.010”
Up to 25
*
.020”
15-40
*
.040”
25-85
*
1/16”
50-160
10-20
3/32”
135-235
15-30
2% Thorium Alloyed Tungsten (Red
Band)
1/8”
250-400
25-40
5/32”
400-500
40-55
3/16”
500-750
55-80
1/4”
750-1000
80-125
♦Typical argon shielding gas flow rates are 15 to 35 cfh (cubic feet per hour) – 7 to 16.5 lpm (liters per minute).
*Not Recommended.
The figures listed are intended as a guide and are a composite of recommendations from American Welding Society (AWS) and electrode
manufacturers.
6-2. Safety Information About Tungsten
1
2
Y Grinding the tungsten electrode produces dust and flying sparks which can cause
injury and start fires. Use local exhaust (forced ventilation) at the grinder or wear an
approved respirator. Read
MSDS for safety information.
Consider using tungsten
containing ceria, lanthana,
or yttria instead of thoria.
Grinding dust from thoriated
electrodes contains low-level radioactive material.
Properly dispose of grinder
dust in an environmentally
safe way. Wear proper face,
hand, and body protection.
Keep flammables away.
1
2
Tungsten Electrode With
Balled End
Pointed Tungsten Electrode
Ref. S-0161
OM-189 116 Page 14
6-3. Preparing Tungsten For DC Electrode Negative (DCEN) Welding
1
1
2
2
Tungsten Electrode
Tapered End
Grind end of tungsten on fine grit,
hard abrasive wheel before welding. Do not use wheel for other jobs
or tungsten can become contaminated causing lower weld quality.
2-1/2 Times
Electrode Diameter
1
2
3
1
2
Stable Arc
Flat
Diameter of this flat determines
amperage capacity.
3
4
Grinding Wheel
Straight Ground
1
2
3
4
Arc Wander
Point
Grinding Wheel
Radial Ground
4
Ideal Tungsten Preparation – Stable Arc
1
2
3
4
Wrong Tungsten Preparation – Wandering Arc
Ref. S-0161 / Ref. S-0162
OM-189 116 Page 15
SECTION 7 – GUIDELINES FOR TIG WELDING (GTAW)
7-1. Positioning the Torch
3
2
4
90°
1
Y Grinding the tungsten electrode produces dust and flying sparks which can cause
injury and start fires. Use local exhaust (forced ventilation) at the grinder or wear an
approved respirator. Read
MSDS for safety information.
Consider using cerium or
lanthanum based tungsten
instead of thoriated. Thorium dust contains low-level
radioactive material. Properly dispose of grinder dust in
an environmentally safe way.
Wear proper face, hand, and
body protection. Keep flammables away.
1
Workpiece
Make sure workpiece is clean
before welding.
2
Work Clamp
Place as close to the weld as
possible.
10–15°
4
5
6
10–25°
3
4
5
6
Torch
Filler Rod (If Applicable)
Gas Cup
Tungsten Electrode
Select and prepare tungsten
according to Sections 6-1, and 6-2
or 6-3.
Guidelines:
5
6
1/16 in
3/16 in
Bottom View Of Gas Cup
The inside diameter of the gas cup
should be at least three times the
tungsten diameter to provide adequate shielding gas coverage. (For
example, if tungsten is 1/16 in
diameter, gas cup should be a
minimum of 3/16 in diameter.
Tungsten extension is the distance
the tungsten extends out gas cup of
torch.
The tungsten extension should be
no greater than the inside diameter
of the gas cup.
Arc length is the distance from the
tungsten to the workpiece.
Ref. ST-161 892
OM-189 116 Page 16
7-2. Torch Movement During Welding
Tungsten Without Filler Rod
75°
Welding direction
Form pool
Tilt torch
Move torch to front
of pool. Repeat process.
Tungsten With Filler Rod
75°
Welding direction
Form pool
Tilt torch
Remove rod
15°
Add filler metal
Move torch to front
of pool. Repeat process.
ST-162 002-B
OM-189 116 Page 17
7-3. Positioning Torch Tungsten For Various Weld Joints
90°
Butt Weld And Stringer Bead
70°
20°
20°
“T” Joint
70°
10°
20°
40°
Lap Joint
70°
20°
30°
90°
Corner Joint
70°
20°
ST-162 003 / S-0792
OM-189 116 Page 18
Notes
OM-189 116 Page 19
SECTION 8 – PARTS LIST
. Hardware is common and
19
25
8
7
6
3
9
5
2
4
10
1
11
12
Figure 8-1. Main Assembly
OM-189 116 Page 20
14
13
32
15
31
16
14
30
29
17
18
26
28
27
24
20
23
21
22
not available unless listed.
Table 8-1. Parts List
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
18
19
20
21
22
23
24
25
26
27
28
28
29
29
30
31
32
Code
156002025
156011021
156121007
057084088
057084074
356029201
056067213
056020046
056020047
156118021
057098003
756005018
956142309
056076209
556049361
056076170
156006012
057084075
057084078
057014097
056159012
056126062
656089028
116170002
057101005
056020048
056067212
056159011
057084076
057084077
058021115
058021116
056061045
058021101
057084072
Dwg
UR.0.0.13
VG.0.0.11
VG.0.0.12
VG.0.10
VG.0.4
VG.0.0.13
VG.0.0.27
VG.0.0.14
VG.0.0.15
VG.0.0.16
UR.1.4
VG.0.0.17
VG.0.0.18
VG.0.0.19
VG.0.0.20
FS.1.0.3
VG.0.0.21
VG.0.5
VG.0.9
VG.0.6
VG.0.0.22
UR.0.0.7
VG.0.0.23
UR.0.0.17
VG.1.8
VG.0.0.24
VG.0.0.25
UR.0.0.15
VG.0.7
VG.0.8
VG.6
VG.7
VG.0.0.26
VG.4
OP.0.3
Qty
1
1
1
1
1
1
2
1
5
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Diagram Ref.
Logic P.C.B.6
Controls P.C.B.5
S2-S3
XL
RC1
Sec. P.C.B.3 (V. 230)
Sec. P.C.B.3 (V. 240)
TP. 80C
FM
Filter P.C.B.1
S1
TP 60C
Main P.C.B.2 (V. 230)
Main P.C.B.2 (V. 240)
T2 (V. 230)
T2 (V. 240)
GS
T1
HF. P.C.B.4
OM-189 116 Page 21
Notes
Effective January 1, 2002
This limited warranty supersedes all previous Miller warranties and is exclusive with no other
guarantees or warranties expressed or implied.
LIMITED WARRANTY – Subject to the terms and conditions
below, Miller Europe S.r.l., Milan Italy, 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 European
distributor or eighteen months after the equipment is sent to
an International distributor.
1.
2.
3.
1 Year — Parts and Labor
*
Original main power rectifiers
*
Inverters (input and output rectifiers only)
1 Year — Parts and Labor
*
Transformer/Rectifier Power Sources
*
Plasma Arc Cutting Power Sources
*
Semi-Automatic and Automatic Wire Feeders
*
Inverter Power Supplies
*
Intellitig
*
Engine Driven Welding Generators
(NOTE: Engines are warranted separately by the
engine manufacturer.)
1 Year — Parts and Labor unless specified
*
DS-2 Feeder
*
Motor Driven Guns (w/exception of Spoolguns)
*
Process Controllers
*
Positioners and Controllers
*
Automatic Motion Devices
*
IHPS Power Sources
*
Water Coolant Systems
*
Flowgauge and Flowmeter Regulators (No Labor)
*
HF Units
*
Grids
*
Maxstar 140
*
Spot Welders
*
Load Banks
*
Miller Cyclomrtic Equi[ment
*
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
*
Induction heating coils and blankets
*
APT, ZIPCUT & PLAZCUT Model Plasma Cutting
Torches
*
Remote Controls
*
Accessory Kits
*
Replacement Parts (No labor)
*
Spoolmate Spoolguns
*
Canvas cover
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.
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.
milan_warr_1yr_10/02
Owner’s Record
Please complete and retain with your personal records.
Model Name
Serial/Style Number
Purchase Date
(Date which equipment was delivered to original customer.)
Distributor
Address
Country
Zip/Postal Code
Miller Europe
Italy
Phone: 39 (0) 2982901
European Headquarters –
United Kingdom
Phone: 44 (0) 1204-593493
FAX: 44 (0) 1204-598066
Miller Electric Mfg. Co.
An Illinois Tool Works Company
1635 West Spencer Street
Appleton, WI 54914 USA
International Headquarters–USA
Phone: 920-735-4505
USA & Canada FAX: 920-735-4134
International FAX: 920-735-4125
PRINTED IN USA
 2003 Miller Electric Mfg. Co. 1/03