Chicago Electric MIG 200 93804 User manual

WELDER DUAL
MIG 200
Model 93804
ASSEMBLY AND OPERATING INSTRUCTIONS
3491 Mission Oaks Blvd., Camarillo, CA 93011
Visit ourWeb site at: http://www.harborfreight.com
Copyright 2006 by Harbor Freight Tools®. All rights reserved. No portion of this
manual or any artwork contained herein may be reproduced in any shape or form
without the express written consent of Harbor Freight Tools.
For technical questions, please call 1-800-444-3353.
®
©
TO PREVENT SERIOUS INJURY,
READ AND UNDERSTAND ALL WARNINGS
AND INSTRUCTIONS BEFORE USE.
Due to continuing improvements, actual product may differ slightly from the product described herein.

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Troubleshooting section at end of manual. Page 2SKU 93804
Contents
PRODUCT SPECIFICATIONS................................................... 3
GENERAL SAFETY RULES ..................................................... 3
Specific Safety Rules ........................................................................6
Grounding...........................................................................................9
Extension Cords ...............................................................................10
Symbology ........................................................................................10
UNPACKING............................................................................. 10
ASSEMBLY INSTRUCTIONS ................................................... 11
To Attach The Wheels .......................................................................11
To Install The Wire Spool ..................................................................11
To Route The Wire .............................................................................12
To Change Wire Settings .................................................................15
Setting The Gun Polarity For Wire Type .........................................16
To Attach The Ground Cable With Clamp ......................................16
To Install A Gas Cylinder .................................................................17
OPERATING INSTRUCTIONS ................................................. 18
Before You Begin Welding ............................................................... 18
Duty Cycle (Duration of Use)...........................................................18
Setting Up The Weld..........................................................................19
Holding The Welding Torch ..............................................................20
Weld Settings Chart .......................................................................... 21
Volt-Ampere Curves .........................................................................22
Weld Diagnosis .................................................................................23
When the Weld is Completed ..........................................................25
INSPECTION, MAINTENANCE, AND CLEANING ................... 26
Nozzle Inspection, Cleaning, and Replacement ...........................26
Contact Tip Inspection, Cleaning, And Replacement ..................26
Replacing The Welding Torch Liner ................................................27
PARTS LISTS & ASSEMBLY DIAGRAMS ............................... 28
Electrical Schematic.........................................................................33
TROUBLESHOOTING .............................................................. 34
WARRANTY ............................................................................. 36

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PRODUCT SPECIFICATIONS
SAVETHIS MANUAL
You will need this manual for the safety warnings and precautions, assembly, operating,
inspection, maintenance and cleaning procedures, parts list and assembly diagram.
Keep your invoice with this manual. Write the invoice number on the inside of the front
cover. Keep this manual and invoice in a safe and dry place for future reference.
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GENERAL SAFETY RULES
WARNING!
READ AND UNDERSTAND ALL INSTRUCTIONS
Failure to follow all instructions listed below may result in
electric shock, fire, and/or serious injury.
SAVE THESE INSTRUCTIONS
WORK AREA
1. Keep your work area clean and well lit. Cluttered benches and dark areas invite
accidents.
2. Do not operate power tools in explosive atmospheres, such as in the presence
of flammable liquids, gases, or dust. Power tools create sparks which may ignite
the dust or fumes.
3. Keep bystanders, children, and visitors away while operating a power tool.
Distractions can cause you to lose control. Protect others in the work area from
debris such as chips and sparks. Provide barriers or shields as needed.

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ELECTRICAL SAFETY
4. Grounded tools must be plugged into an outlet properly installed and grounded
in accordance with all codes and ordinances. Never remove the grounding
prong or modify the plug in any way. Do not use any adapter plugs. Check
with a qualified electrician if you are in doubt as to whether the outlet is properly
grounded. If the tools should electrically malfunction or break down, grounding
provides a low resistance path to carry electricity away from the user.
5. Avoid body contact with grounded surfaces such as pipes, radiators, ranges,
and refrigerators. There is an increased risk of electric shock if your body is
grounded.
6. Do not expose power tools to rain or wet conditions. Water entering a power
tool will increase the risk of electric shock.
7. Do not abuse the Power Cord. Never use the Power Cord to carry the tools or
pull the Plug from an outlet. Keep the Power Cord away from heat, oil, sharp
edges,or moving parts. Replace damaged Power Cords immediately. Damaged
Power Cords increase the risk of electric shock.
8. When operating a power tool outside, use an outdoor extension cord marked
“W-A” or“W”. These extension cords are rated for outdoor use, and reduce the risk
of electric shock.
PERSONAL SAFETY
9. Stay alert. Watch what you are doing, and use common sense when operating
a power tool. Do not use a power tool while tired or under the influence of
drugs, alcohol, or medication. A moment of inattention while operating power
tools may result in serious personal injury.
10. Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep
your hair, clothing, and gloves away from moving parts. Loose clothes, jewelry,
or long hair can be caught in moving parts.
11. Avoid accidental starting. Be sure the Power Switch is off before plugging in.
Carrying power tools with your finger on the Power Switch, or plugging in power
tools with the Power Switch on, invites accidents.
12. Remove adjusting keys or wrenches before turning the power tool on. A wrench
or a key that is left attached to a rotating part of the power tool may result in personal
injury.
13. Do not overreach. Keep proper footing and balance at all times. Proper footing
and balance enables better control of the power tool in unexpected situations.
14. Always wear eye, hearing, and breathing protection. For welding safety
equipment, refer to number 9on page 6.
TOOL USE AND CARE

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15. Use clamps (not included) or other practical ways to secure and support the
workpiece to a stable platform. Holding the work by hand or against your body is
unstable and may lead to loss of control.
16. Do not force the tool. Use the correct tool for your application. The correct tool
will do the job better and safer at the rate for which it is designed.
17. Do not use the power tool if the Power Switch does not turn it on or off. Any
tool that cannot be controlled with the Power Switch is dangerous and must be
replaced.
18. Disconnect the Power Cord Plug from the power source before making any
adjustments, changing accessories, or storing the tool. Such preventive safety
measures reduce the risk of starting the tool accidentally.
19. Store idle tools out of reach of children and other untrained persons. Tools are
dangerous in the hands of untrained users.
20. Maintain tools with care. Keep cutting tools sharp and clean. Properly
maintained tools with a sharp cutting edge are less likely to bind and are easier to
control. Do not use a damaged tool. Tag damaged tools “Do not use” until repaired.
21. Check for misalignment or binding of moving parts, breakage of parts, and
any other condition that may affect the tool’s operation. If damaged, have the
tool serviced before using. Many accidents are caused by poorly maintained
tools.
22. Use only accessories that are recommended by the manufacturer for your
model. Accessories that may be suitable for one tool may become hazardous when
used on another tool.
SERVICE
23. Tool service must be performed only by qualified repair personnel. Service or
maintenance performed by unqualified personnel could result in a risk of injury.
24. When servicing a tool, use only identical replacement parts. Follow instructions
in the
“Inspection, Maintenance, And Cleaning” section of this manual. Use of
unauthorized parts or failure to follow maintenance instructions may create a risk of
electric shock or injury.

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SPECIFIC SAFETY RULES
1. Ground this product. This Welder requires the attachment and use of a UL®-
listed, 220 volt, grounded, 3-prong, electrical Power Cord Plug (not included). Only
a qualified electrician should install the Power Cord Plug. Never remove the
grounding prong or modify the Power Cord Plug in any way. Do not use adapter
plugs with this product. To comply with the National Electric Code, and to provide
additional protection from the risk of electrical shock, this product should only be
connected to a 220 volt, 3-hole outlet that is properly grounded.
2. Maintain labels and nameplates on the Welder. These carry important information.
If unreadable or missing, contact Harbor Freight Tools for a replacement.
3. Avoid unintentional starting. Make sure you are prepared to begin work before
turning on the Welder.
4. Do not force the Welder. This tool will do the work better and safer at the speed
and capacity for which it was designed.
5. Never leave theWelder unattended when it is plugged into an electrical outlet.
Turn off the tool, and unplug it from its electrical outlet before leaving.
6. Industrial applications must follow OSHA guidelines.
7. Never stand on the Welder. Serious injury could result if the Welder is tipped or if
hot surfaces are accidently contacted.
8. Maintain a safe working environment. Keep the work area well lit. Make sure
there is adequate surrounding workspace. Always keep the work area free of
obstructions, grease, oil, trash, and other debris. Do not use a power tool in areas
near flammable chemicals, dusts, and vapors. Do not use this product in a damp or
wet location.
9. Prevent eye injury and burns. Wearing and using ANSI-approved personal
safety clothing and safety devices reduce the risk for injury.
• Wear ANSI-approved safety impact eye goggles with a welding helmet
with protective lens.
• Leather leggings, fire resistant shoes or boots should be worn when using this
product. Do not wear pants with cuffs, shirts with open pockets, or any clothing
that can catch and hold molten metal or sparks.
• Keep clothing free of grease, oil, solvents, or any flammable substances. Wear
dry, insulating gloves and protective clothing.
• Wear an approved head covering to protect the head and neck. Use aprons,
cape, sleeves, shoulder covers, and bibs designed and approved for welding
and cutting procedures.
• When welding/cutting overhead or in confined spaces, wear flame resistant ear
plugs or ear muffs to keep sparks out of ears.

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10. Prevent accidental fires. Remove any combustible material from the work
area.
•When possible, move the work to a location well away from combustible
materials. If relocation is not possible, protect the combustibles with a
cover made of fire resistant material.
• Remove or make safe all combustible materials for a radius of 35 feet (10 meters)
around the work area. Use a fire resistant material to cover or block all open
doorways, windows, cracks, and other openings.
• Enclose the work area with portable fire resistant screens. Protect combustible
walls, ceilings, floors, etc., from sparks and heat with fire resistant covers.
• If working on a metal wall, ceiling, etc., prevent ignition of combustibles on the
other side by moving the combustibles to a safe location. If relocation of
combustibles is not possible, designate someone to serve as a fire watch,
equipped with a fire extinguisher, during the cutting process and for at least one
half hour after the cutting is completed.
• Do not weld or cut on materials having a combustible coating or combustible
internal structure, as in walls or ceilings, without an approved method for
eliminating the hazard.
• Do not dispose of hot slag in containers holding combustible materials. Keep a
fire extinguisher nearby and know how to use it.
• After spot welding, make a thorough examination for evidence of fire. Be aware
that easily-visible smoke or flame may not be present for some time after the fire
has started. Do not weld or cut in atmospheres containing dangerously reactive
or flammable gases, vapors, liquids, and dust. Provide adequate ventilation in
work areas to prevent accumulation of flammable gases, vapors, and dust. Do
not apply heat to a container that has held an unknown substance or a
combustible material whose contents, when heated, can produce flammable or
explosive vapors. Clean and purge containers before applying heat. Vent closed
containers, including castings, before preheating, welding, or cutting.
11. Avoid overexposure to fumes and gases. Always keep your head out of the
fumes. Do not breathe the fumes. Use enough ventilation or exhaust, or both, to
keep fumes and gases from your breathing zone and general area.
• Where ventilation is questionable, have a qualified technician take an air
sampling to determine the need for corrective measures. Use mechanical
ventilation to improve air quality. If engineering controls are not feasible, use an
approved respirator.
• Work in a confined area only if it is well ventilated, or while wearing an air-
supplied respirator.
• Follow OSHA guidelines for Permissible Exposure Limits (PEL’s) for various
fumes and gases.
• Follow the American Conference of Governmental Industrial Hygienists
recommendations for Threshold Limit Values (TLV’s) for fumes and gases.

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• Have a recognized specialist in Industrial Hygiene or Environmental Services
check the operation and air quality and make recommendations for the specific
welding or cutting situation.
12. Read and understand all instructions and safety precautions as outlined in
the manufacturer’s manual for the material you will weld or cut.
13. Do not touch live electrical parts.Wear dry, insulating gloves. Do not touch
electrode or conductor tong with bare hand. Do not wear wet or damaged gloves.
14. Protect yourself from electric shock. Do not use outdoors. Insulate yourself from
the workpiece and ground. Use nonflammable, dry insulating material if possible, or
use dry rubber mats, dry wood or plywood, or other dry insulating material big enough
to cover your full area of contact with the work or ground.
15. Ensure that the unit is placed on a stable location before use. If this unit falls
while plugged in, severe injury, electric shock, or fire may result.
16. Cylinders can explode when damaged:
• Never weld on a pressurized or a closed cylinder.
• Never lay a welding torch on a cylinder.
• Never allow a welding electrode to touch the cylinder.
• Keep cylinders away from any electrical circuits, including welding circuits.
• Keep protective cap in place over the valve except when the cylinder is in use.
• Use only correct gas shielding equipment designed specifically for the type of
welding you will do. Maintain this equipment properly.
• Always protect gas cylinders from heat, being struck, physical damage, slag,
flames, sparks, and arcs.
• Always use proper procedures to move cylinders.
Inhalation Hazard
Welding Produces TOXIC FUMES and GASSES.
Exposure to welding gasses can increase the risk of developing
certain cancers, such as cancer of the larynx and lung cancer.
Also, some diseases that may be linked to exposure to welding gasses
or fumes are:
•Early onset of Parkinson’s Disease •Heart Disease
•Damage to the reproductive organs •Ulcers
•Inflammation of the small intestine or stomach •Kidney damage
•Respiratory diseases such as emphysema, bronchitis or pneumonia
Safety precautions, such as using natural or forced air ventilation
and wearing a NIOSH-approved respirator, are ESSENTIAL to reduce
the risk of developing the above illnesses.

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17. Use the right tool for the job. Do not attempt to force small equipment to do the
work of larger industrial equipment. There are certain applications for which this
Welder was designed. It will do the job better and more safely at the rate for which
it was intended. Do not modify thisWelder, and do not use this Welder for a purpose
for which it was not intended.
18. WARNING! People with pacemakers should consult their physician(s) before
using this product. Electromagnetic fields in close proximity to a heart pacemaker
could cause interference to or failure of the pacemaker.
19. WARNING! The warnings and cautions discussed in this manual cannot cover
all possible conditions and situations that may occur. It must be understood by the
operator that common sense and caution are factors which cannot be built into this
product, but must be supplied by the operator.
20. WARNING! This product, when used for welding and similar applications,
produces chemicals known to the State of California to cause cancer and birth
defects (or other reproductive harm).
(California Health & Safety Code § 25249.5,
et seq. )
SAVE THESE INSTRUCTIONS
GROUNDING
NOTE:
This Welder requires the installation of a 3-Prong, 220 VAC, polarized,
twistlock Power Cord Plug (not included).
NEMA configuration # L6-50 or equivalent
The Plug must be installed by a certified electrician.
WARNING!
Improperly connecting the grounding wire can result in the risk of elec-
tric shock. Check with a qualified electrician if you are in doubt as to
whether the outlet is properly grounded. Do not modify the power cord
plug used with the tool. Never remove the grounding prong from the
plug. Do not use the tool if the power cord or plug is damaged. If dam-
aged, have it repaired by a service facility before use. If the plug will not
fit the outlet, have a proper outlet installed by a qualified electrician.
GROUNDED TOOLS: TOOLS WITH THREE PRONG PLUGS
1. Tools marked with “Grounding Required” have a three wire cord and three prong
grounding plug. The plug must be connected to a properly grounded outlet. If the
tool should electrically malfunction or break down, grounding provides a low
resistance path to carry electricity away from the user, reducing the risk of electric
shock.

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2. The grounding prong in the plug is connected through the green wire inside the
cord to the grounding system in the tool. The green wire in the cord must be the only
wire connected to the tool’s grounding system and must never be attached to an
electrically “live” terminal.
3. Your tool must be plugged into an appropriate outlet, properly installed
by a certified
electrician
and grounded in accordance with all codes and ordinances.
EXTENSION CORDS
AN EXTENSION CORD MUST NEVER BE USED WITH THIS ITEM. Use of an
extension cord could result in damage to the item or fire.
SYMBOLOGY
Double Insulated
Canadian Standards
Association
Underwriters Laboratories,
Inc.
V ~ Volts Alternating Current
AAmperes
noxxxx/min. No Load Revolutions per
Minute (RPM)
UNPACKING
When unpacking both boxes, check to make sure all the parts shown on the Parts Lists
on pages 28 through 32 are included. If any parts are missing or broken, please call
Harbor Freight Tools at the number shown on the cover of this manual as soon as pos-
sible.

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ASSEMBLY INSTRUCTIONS
WARNING!
Always turn off the Welder and unplug the unit from its electrical
outlet prior to performing any assembly, maintenance, or service.
TO ATTACH THE WHEELS
Attach the four Swivel Wheels (15A) at the front and at the rear of the Base (2A) of
the unit, using the Bolts, Lock Washers, and Washers provided.
(See Assy. Diagram, page 28.)
TO INSTALL THE WIRE SPOOL
1. Use the Handle (5A) and lift the Door (6A) of the Welder to expose the Wire Feed
Assembly. (See Figure D.)
2. Unscrew and remove the two Nuts (1B) from the Threaded Shaft. Then, pull out and
remove the
outer Retaining Spool Ring (2B). (See Figure D.)
3. Insert the Spool (4B) onto the
inner Retaining Spool Ring (2B), making sure the
Spool’s Welding Wire unwinds from the bottom (clockwise). (See Figure D.)
4. Insert the outer Retaining Spool Ring (2B) into the Spool (4B). Then, firmly screw
the two Nuts (1B) back onto the Threaded Shaft. (See Figure D.)
FIGURE D
NUT
(1B)
RETAINING
SPOOL RING
(2B)
SPOOL
(4B)
RETAINING
SPOOL RING
(2B)
SPRING
(3B)
BRAKE
WASHER
(5B)
THREADED
SHAFT
WELDING
WIRE
RETAINING
SPOOL RING
(2B)
NUT
(1B)

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TO ROUTE THE WIRE
NOTE: When installing wire of a different size or composition, you will also need to
change wire settings, set the gun polarity, and, possibly, install a gas cylinder. See
pages 15-17.
1. IMPORTANT: Securely hold onto the end of the Welding Wire and keep tension on
it during the following steps. If this is not done the Welding Wire will spring backward,
creating a tangled “bird’s nest” and resulting in wasted wire. (See Figure E.)
2. Hold the Welding Wire securely while you cut enough Wire off the end of the Spool
(4B) to remove all bent and crimped Wire. Make sure the cut end has no burrs or
sharp edges (cut again, if needed). (See Figure E.)
3. Loosen, and lower the Handle (6.1C) on the Wire Feed Assembly. Then, raise the
Lever (4C). (See Figure F.)
SPOOL
(4B)
WELDING WIRE FIGURE E
FIGURE F
HANDLE
(6.1C)
LEVER
(4C)

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4. Keep tension on the Wire, and guide at least 12 inches of Wire into the Wire Inlet
Guide (3C). (See Figure G.)
5. Lower the Lever (4C) on the Wire Feed Assembly. Raise and tighten the Handle
(6.1C). Once the Wire is held in place, you may release it. (See Figure H.)
6. Lay the Torch Cable out in a straight line so that the Welding Wire moves through it
easily. Leave the Door (6A) of the Welder open so that the Wire Feed Assembly can
be observed.
7. Remove the Gun Nozzle (1E) and Contact Tip (2E). (See Figure I.)
HANDLE
(6.1C)
LEVER
(4C)
FIGURE H
WELDING
WIRE
FIGURE G
WIRE INLET
GUIDE
(3C)
WELDING
WIRE

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WARNING!
EXERCISE EXTREME CAUTION - RISK OF FIRE AND/OR ELECTRIC SHOCK!
The following steps require applying power to the Welder. Do not touch
anything with the Torch Handle or Welding Wire or an arc will be ignited.
Do not touch the internal components of the unit while it is plugged in.
8. Plug the Power Cord (1A) into its 220 volt, grounded, electrical outlet. Then, turn
the Welder’s Power Switch (4D) to its “ON” position.
9. Point the Torch Handle away from all objects. Then, squeeze the Trigger Switch
(13E) on the Torch Handle until the Welding Wire feeds through the Head Tube (4E)
of the Torch Handle about 2 inches. If necessary, move the Torch Handle slightly in
a circular motion to help feed the Welding Wire properly out of the Head Tube.
(See Figure I.)
10. NOTE: If the Welding Wire does not feed properly, and the Spool (4B) is stationary,
turn the Welder off. Unplug the Welder. Slightly tighten the Handle (6.1C) on the
Wire Feed Assembly, and rewind the Welding Wire slightly before retrying.
(See Figure H.)
11. To check the tension on the Wire Feed Assembly, feed the Welding Wire against a
piece of scrap wood from 2 to 3 inches away. If the Wire stops instead of bending,
turn the Welder OFF. Unplug the unit from its electrical outlet. Then, slightly tighten
the Handle (6.1C) on the Wire Feed Assembly. (See Figure H.)
12. Turn the Welder OFF, unplug it, and discharge the electrode to ground. Insert
the Contact Tip (2E) onto the Welding Wire and screw it firmly into the Head Tube
(4E) of the Torch Handle. Replace the Nozzle (1E), and cut off any excess Welding
Wire over 1/2 inch. Then, close the Door (6A) of the Welder. (See Figure I.)
REMINDER: When installing wire of a different size or composition, you will also
need to change wire settings, set the gun polarity, and, possibly, install a gas cylinder.
See pages 15-17.
FIGURE I
CONTACT
TIP
(2E)
NOZZLE
(1E)
WELDING
WIRE
HEAD
TUBE
(4E)
NOZZLE
(1E)
CONTACT
TIP
(2E)
HEAD
TUBE
(4E)
TRIGGER
SWITCH
(13E)
TRIGGER
SWITCH
(13E)

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TO CHANGE WIRE SETTINGS
1. WARNING! Make sure to turn off the Welder and unplug it from its electrical
outlet prior to changing wire settings.
2. Use the Handle (5A) and lift the Door (6A) of the Welder to expose the Wire Feed
Assembly. (See Figure J.)
3. Loosen, and lower the Handle (6.1C) on the Wire Feed Assembly. Then, raise the
Lever (4C). (See Figure J.)
4. Remove the Screw that secures the Roller (5C) in place. Then, remove the two
Rollers. (See Figure J.)
5. Flip each Roller 180 degrees so that the width of the top groove formed by the two
Rollers correspond with the diameter of Welding Wire used.
NOTE: The two Rollers are “keyed”, meaning they can only be reinstalled one way.
(See Figure J.)
6. Reinstall the two Rollers, and secure the Rollers in place with the Screw.
(See Figure J.)
7. Lower the Lever (4C) on the Wire Feed Assembly. Lower and tighten the Handle
(6.1C).
8. Remove the Gun Nozzle (1E) and Contact Tip (2E). Install a Contact Tip that is one
size larger* than the diameter of Welding Wire used. Then, replace the Gun Nozzle.
(See Figure I.)
*This accommodates thermal expansion of the wire.
9. Install the Spool (4B) of Welding Wire, and route the Wire to the Torch Gun. Then,
test and, if necessary, adjust the Wire Feed Assembly as discussed in the previous
pages of this manual.
FIGURE J
SCREW ROLLERS
(5C)
ROLLERS
(5C)
FLIP 180°
WELDING WIRE

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SETTING THE GUN POLARITY FOR WIRE TYPE
1. Set for Electrode Positive (DCEP) for gas welding with solid-core wire. Red
Electrode Cable (C) to Positive Terminal (A); Black Ground Cable (D) to Negative
Terminal (B). SHOWN IN ILLUSTRATION, INITIAL SETUP. (See Figure K.)
2. Set for Electrode Negative (DCEN) for gas-less flux
core wire. Red Electrode Cable (C) to Negative
Terminal (B); Black Ground Cable (D) to Positive
Terminal (A). (See Figure K.)
3. When connecting to the weld output terminals, do
not place anything between the welding Cable
Terminals (A and B) and their copper connections.
(See Figure K.)
4. Always read and follow wire manufacturer’s
recommended polarity.
5. A. Positive (+) OutputTerminal
B. Negative (–) Output Terminal
C. Red Cable - Electrode
D. Black Cable - Ground
TO ATTACH THE GROUND CABLE WITH CLAMP
1. Insert the bare end of the Ground Cable (11D) upward through the hole located at
the rear of the Ground Clamp (11D). Then secure the bare end of the Ground Cable
to the Ground Clamp, using the Bolt, Lock Washer, and Nut provided.
(See Figure L.)
2. Insert the Connecting Plug of the Ground Cable (11D) into the Terminal Ground
(10D) and twist the Connecting Plug to lock it in place. (See Figure L.)
FIGURE L
WELDER
(SIDE VIEW)
TORCH CABLE
CONNECTING
PLUG
TERMINAL GROUND (10D)
GROUND CABLE WITH CLAMP
(11D)
BOLT, LOCK WASHER, NUT
FIGURE K

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Troubleshooting section at end of manual. Page 17SKU 93804
TO INSTALL A GAS CYLINDER
1. CAUTION! Do not use an Argon/Mixed pressure regulator/flow meter with CO2
shielding gas. To use CO2shielding gas, you must install a CO2gas pressure
regulator/flow meter (neither one included).
2. With assistance, set the cylinder upright against a solid post or other stationary
object and use a chain or a heavy duty strap (neither included) to secure the cylinder
in place. (See Figure M.)
3. Remove the protective cap from the cylinder. Stand to the side of the cylinder valve,
and open the valve slightly to blow dust and dirt from the valve. Then, close the
valve. (See Figure M.)
4. Make sure the Flow Adjust on the Pressure Regulator/Flow Meter is turned off.Then,
screw the Pressure Regulator/Flow Meter firmly onto the cylinder valve.
(See Figure M.)
5. Attach the Gas Hose from the Pressure Regulator/Flow Meter to the Gas Inlet Valve
(17A) located on the Rear Panel (2A) of the Welder. (See Figure M.)
6. Adjust the flow rate of the gas by turning the Flow Adjust. The typical flow rate is 20
cfh (cubic feet per hour). Make sure to check the Welding Wire manufacturer’s
recommended flow rate. (See Figure M.)
FIGURE M
REAR PANEL
(2A)
GAS INLET VALVE
(17A)
CHAIN
OR
STRAP
REGULATOR/FLOW METER
CYLINDER
VALVE
FLOW ADJUST
SOLID POST
OR
OTHER
STATIONARY
OBJECT

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Troubleshooting section at end of manual. Page 18SKU 93804
OPERATING INSTRUCTIONS
BEFORE YOU BEGIN WELDING
Good welding requires a high degree of skill and experience. You should practice a
few sample welds on scrap metal before you begin welding your first project. Additional
practice periods are recommended whenever you weld a different thickness of material,
wire, or weld a different type of connection.
DUTY CYCLE (DURATION OF USE)
1. CAUTION! Avoid damage to the Welder by not leaving the unit on for more than the
prescribed duty cycle time.
2. The duty cycle defines the number of minutes, within a 10 minute period, during
which a given Welder can safely produce a particular welding current. For example,
this Welder, with a 15% duty cycle at 200 Amps, must be allowed to rest for at
least eight minutes thirty seconds after every minute and thirty seconds of
continuous weld at 200 Amps.
(See Figure N.)
3. Failure to carefully observe duty cycle limitations can easily over stress a Welder’s
power generation system, contributing to premature Welder failure.
4. This Welder is equipped with an internal thermal protection system to help prevent
over stressing the unit. When the unit overheats, it automatically shuts down, then
automatically returns to service when it cools down.
NOTE: Once the unit returns to service, follow a more conservative duty cycle routine
to help prevent excess wear to the Welder. (See Figure N.)
FIGURE N
Other settings fall between these two ranges.

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Troubleshooting section at end of manual. Page 19SKU 93804
SETTING UP THE WELD
WARNING!
Before welding, make sure to read and understand all safety
precautions and warnings discussed on pages 3 through 10.
1. Power Switch (4D): Always make sure the Power Switch is in its “OFF” position
before plugging the Welder into a 220 volt, grounded, electrical outlet.
(See Figure P.)
2. Overload Protector (7D): If too much current is drawn from the Welder, the Overload
Protector will activate. The RED Overload Indicator will illuminate. And the Welder
will automatically turn off until it cools down. If this happens, turn the Power Switch
(4D) to its “OFF” position and wait approximately 3 to 5 minutes.
(See Figure P.)
3. Wire Feed Speed Knob (3D): The Scale surrounding the Knob is relative value,
not wire feed speed. Adjust the Wire Feed Speed Knob based on thickness of the
metal being welded. (See Figure P below, and Figure S, page 21.)
4. Voltage Selector Knob (2D): The Scale surrounding the Knob is relative value,
not voltage. Adjust the Voltage Selector Knob based on thickness of metal being
welded. (See Figure P below, and Figure S, page 21.)
5. If using solid-core wire, connect and secure an Argon/ CO2 gas hose to the rear of
the Welder. (If using flux core wire, protective gas is not required.) (See Figure M.)
6. Securely clamp the Ground Cable Clamp (11D) as close as possible to the metal
object to be welded, or to the metal workbench where the object is mounted and
electrically connected. (See Figure L.)
7. NOTE: The workpieces should be firmly held together and in position while welding.
Use clamps (not included) to hold the workpieces so you can concentrate on the job
POWER SWITCH
(4D)
VOLTAGE
SELECTOR
KNOB (2D)
WIRE FEED
SPEED KNOB (3D)
OVERLOAD INDICATOR
(7D)
FIGURE P

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Troubleshooting section at end of manual. Page 20SKU 93804
at hand. The distance (if any) between the two workpieces must be controlled properly
to allow the weld to hold both sides securely while allowing the weld to penetrate
fully into the joint.
8. Set the desired welding current (30 to 200 Amps) for the type/thickness of metal
being welded, using the Wire Feed Speed Knob (3D) and Voltage Selector Knob
(2D). (See Figure P above, and Figure S, page 21.)
9. Make sure the Power Switch (4D) is in its “OFF” position. Then plug Power Cord
(1A) of the Welder into a dedicated, 220 VAC, 40 AMP line with delayed action type
circuit breaker or fuse. (See Figure P.)
10. While holding the Welding Torch (15E), with the Welding Wire clearly out of the way
of any grounded objects, turn the Power Switch (4D) to its “ON” position.
(See Figure P.)
11. Momentarily squeeze the Trigger Switch (13E) of the Welding Torch (15E) to test the
wire feed speed. If necessary, adjust the speed by turning the Wire Feed Speed
Knob (3D). (See Figure P.)
12. Orient yourself on the area to be welded, then place a Face Shield over your eyes.
WARNING! Never look at the ignited arc without ANSI-approved,
arc-shaded, eye protection in a full face shield. Permanent eye damage
or blindness can occur. Skin burns can occur. Never breathe arc fumes.
(See page 8.)
HOLDING THE WELDING TORCH
13. Hold the Welding Torch (15E) in one hand and the face shield in the other. If a
hands-free welding shield is used, then both hands can be used to control the
Welding Torch.
14. The Welding Wire should be directed straight into the joint.
This gives an angle of 90 degrees (straight up and down) for
groove (end to end) welds, and an angle of 45 degrees for
fillet (T-shaped) welds.
15. The end of the Welding Torch should be tilted so that the
Welding Wire is angled anywhere in between straight on and
15 degrees in the direction of the weld. The amount of tilt is
called the “drag angle”. (See Figure Q.)
16. The Welding Wire should extend no more than 1/2” past the
Nozzle (1.1D) of the Welding Torch (15E). This distance is
called “stickout”. (See Figure Q.)
17. Set the Wire Feed Speed Knob (3D) to the recommended start setting as shown in
the Weld Settings Chart on the next page. (See Figure S.)
FIGURE Q