Merlin 150 Arc Welder User Manual

Operating Manual  
For  
MigWeld 200S  
200 AMP Inverter MIG/STICK Welder 220v  
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THANK YOU!  
We, at LONGEVITY, want to thank you for purchasing our product. You are almost ready to experience  
Longevity Welding first hand. Longevity definitely appreciates your business and understand that this  
equipment may be overwhelming to setup and operate so we have prepared a manual that will assist you  
in understand your new plasma cutter/welder. If you have any questions during or after reading this  
manual, please feel to contact us! Please take a moment to register your product on our website at  
Once again, thank you for choosing Longevity as your main welding supplier!  
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Longevity Global, Inc.  
23591 Foley St  
Hayward, CA 94545  
Toll-Free Customer Support: 1-877-LONG-INC / 1-877-566-4462  
Customer Service: [email protected]  
Complaints: [email protected]  
Please join our welding forums to share welding tips and tricks, to receive useful information from  
customers who also use our products, and to be a part of the Longevity™ welding community  
LONGEVITY Global, Inc. will cover the return and replacement shipping charges (both ways) for units  
in need of warranty within and only for the first 30 days from the purchase date. After the 30 days from  
the purchase date, the purchaser shall be responsible for all shipping and handling costs of returning (both  
ways) the defective/faulty products for repair or replacement. We are not responsible for lost returns. The  
labor coverage only applies if the unit is serviced at our facility or one of our authorized dealers. We will  
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not reimburse the labor if your wish to have a third-party or unauthorized repair technicians work on the  
product.  
Shipping Damage  
Your machine is insured against damage during shipping. Keep all packing materials and containers in  
case machine must be returned. We will initiate a claim with the shipping company to cover damage or  
loss. If there is shipping damage upon opening your package, our customer service team will work with  
you to get the matter resolved.  
In Warranty Service  
Customers, who own machines that are in warranty and require service, should contact our Warranty  
Department by email at [email protected] to obtain a return authorization code. In addition to the  
warranty we offer, we would like for you to register your product on our website  
at www.longevity-inc.com/resources. Remember, warranty starts from the date of purchase. For your  
convenience, write your order information below so you can track your order in case you need warranty  
work.  
Order No.: _________________________________  
Date of Purchase: _____________________________  
Warranty Period: ______________________________  
Out-of-Warranty Service  
Customers, who own machines that are out of warranty and require service, should contact us for an  
estimate. Longevity offers an exchange program on out of warranty units. We also help non  
LONGEVITY customers with repairs, replacement, and service.  
If your unit is not manufactured by Longevity and you cannot receive service from your manufacturer or  
seller, Longevity will lend out hand. Our warranty policy is also available for all plasma cutters and  
welders. For more information, please email us at [email protected]  
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Warnings and Safety  
Welding and plasma cutting may be dangerous to the operator and to bystanders, if the  
equipment is not operated properly. Welding or cutting must be performed in accordance with  
all relevant safety regulations. Carefully read and understand this instruction manual before  
installing and operating this equipment.  
Changing function modes during welding may damage  
equipment.  
Before welding, disconnect the electrode-holder cable from the  
equipment.  
A circuit breaker is required to prevent electrical overload of the  
equipment.  
Only high quality welding tools should be used.  
Electric Shock can be fatal.  
Ensure that ground cable is connected in accordance with  
applicable safety codes.  
Never touch electrodes, wires, or circuit components with bare  
hands. Wear dry welding gloves when welding.  
The operator must be insulated from the work piece.  
Smoke and gas can be harmful to health.  
Ensure that the working area is well ventilated.  
Avoid breathing smoke and gas generated during the welding  
process. Cutting and welding can cause cancer because of the  
smoke that comes from the welds and cuts.  
Arc-light emission can be harmful to eyes and skin.  
Always wear a welding helmet, anti-radiation glass, and work  
clothes while welding.  
Ensure that people in or near the working area are protected.  
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Welding splash is a fire hazard.  
Keep flammable material away from the work place.  
Keep a fire extinguisher nearby, and have all personnel trained in  
its use.  
Surface noise generated while welding or cutting can be harmful  
to hearing.  
In the event of a machine fault.  
Refer to this instruction manual.  
If the fault cannot be determined, contact your local dealer or  
supplier for assistance.  
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Safety Tips  
Consider the following tips to ensure safe operation of your welding/cutting equipment:  
Ensure that this welding equipment is installed in an area free of corrosive chemical gases, flammable  
gases or materials, and explosive chemicals.  
The area should contain little dust, and have a humidity of no more than 80%.  
Operate the welding equipment in an area sheltered from direct sunlight and precipitation. Work area  
temperature should be maintained at -10 toC+40  
C;  
If, because of an overload, the machine suddenly stops, and it is necessary to restart it, leave the  
internal fan operating to lower the inside temperature.  
Always wear protective clothing and a welding mask to protect your skin.  
Wear safety goggles designed to darken the arc generated by your machine.  
Wear suitable noise protection to protect your hearing.  
Ensure that machine is grounded through the power cord or on the machine case.  
Never operate the machine in bare feet or on a wet floor.  
Never switch the machine off while it’s in use. Doing so will damage the internal circuitry.  
Ensure that your circuit breaker is rated to handle the current requirements of your machine.  
Use a UL approved receptacles and plugs with your machine. Never hard wire the machine to main  
power.  
Work in a well-ventilated area to avoid smoke. Keep your head out of the smoke. Ensure that air is  
flowing away from you to avoid inhaling smoke.  
least 12 inches  
Ensure proper ventilation through the machine’s louvers. Maintain a distance of at  
between this cutting equipment and any other objects in the work area.  
Use a screen or curtain designed to keep passer byes from viewing the arc.  
The arc spray and metal spray from machine use may cause nearby fires. Use caution.  
If, after reviewing this manual, you have any problems in setting up or operating your machine,  
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WARNING: The warnings, cautions and instructions discussed in this instruction 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.  
ARC WELDER SAFETY WARNINGS AND PERCAUTIONS  
Warning: This product, when used for welding and similar applications, produces chemicals to  
cause cancer and birth defects (or other reproductive harm).  
Avoid electrical shock. Do not permit electrically live parts,  
cables, or electrodes to contact skin, clothing or gloves.  
Protective clothing should be hole free, dry and ANSI  
approved. This unit draws enough current to cause serious  
injury or death. Before turning the welder on, check the  
welder gun to be sure that there are no protruding screw  
heads and that all insulation is secure. Do not weld unless  
you are insulated from the ground and the work piece.  
Avoid breathing fumes or gases. These gases can cause  
serious health problems. Use an active ventilation system  
directly above the welding area. Keep your head out of the  
fumes.  
Avoid eye and body damage. Arc rays and infrared radiation  
can cause injury to the eyes and burn the skin. Wear ANSI approved eye and body protection. Do not allow viewing by visitors  
without proper eye and body protection.  
Know proper arc welding practices. Read and understand the manufacture’s instructions, as well as your employer’s safety  
practices for arc welding.  
Connect only to a code approved power source. Connect only to a grounding power source conforming to the National  
Electrical Code and Local Codes.  
Avoid fire and explosion. Remove flammable and explosive material to a minimum of 35 feet from the welding arc to prevent  
welding sparks or molten metal from starting a fire. Keep a type ABC fire extinguisher within easy reach. Thoroughly clean the  
object being welded of any paint, grease or other foreign material.  
Avoid being burned. Always wear ANSI approved welding gear: eye wear, leather gloves, leather apron and shoes.  
WARNING  
ARC WELDING CAN BE HAZARDOUS  
WARNING: THIS WELDING MACHINE MUST BE CONNECTED TO POWER SOURCE IN ACCORDANCE WITH  
LOCAL ELECTRICAL CODES  
WARNING: DISCONNECT POWER SOURCE BEFORE DISASSEMBLY OF THE TORCH  
WARNING: THE SHIELD NOZZLE MUST BE INSTALLED PRIOR TO OPERATION OF THE TORCH  
WARNING: ALL INSTALLATION, MAINTENANCE, REPAIR OPERATION OF THIS EQUIPMENT SHOULD BE  
PREFORMED BY QUALIFIED PERSONS ONLY IN ACCORDANCE WITH NATIONAL, STATE AND LOCAL CODES  
ELECTRIC SHOCK CAN KILL.  
Improper use of electric arc welders can cause electric shock, injury and death! Take all precautions described in this manual to  
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reduce the possibility of electric shock.  
The MigWeld140 power switch is to be in the OFF (“O”) position when installing work cable and gun and when connecting  
power cord to input power.  
Always wear dry, protective clothing and welding gloves and insulated footwear.  
Always operate the welder in a clean, dry, well-ventilated area. Do not operate the welder in humid, wet, rainy or poorly  
ventilated areas.  
Be sure that the work piece is properly supported and grounded prior to beginning the electric arc welding operation.  
The electrode and work (or ground) circuits are electrically “hot” when the welder is on. Do not touch these “hot” parts with  
your bare skin or wet clothing.  
Ground the work or metal to be welded to a good electrical (earth) ground.  
FUMES AND GASES can be dangerous.  
Do not breathe fumes that are produced by the arc welding operation. These fumes are dangerous.  
Keep the head and face out of the welding fumes.  
Shielding gases used for arc welding can displace air and cause injury or death. Always use enough ventilation.  
WELDING SPARKS can cause fire or explosion.  
Do not operate electric arc welder in areas where flammable or  
explosive vapors.  
Always keep a fire extinguisher accessible while performing arc-  
welding operations.  
ARC RAYS can burn.  
Use a shield with the proper filter and cover plates to protect your  
eyes from sparks and the rays of the arc when welding or observing  
open arc welding.  
Use suitable clothing made from durable flame-resistant material to  
protect your skin and that of your helpers from the rays.  
Protect other nearby personnel with suitable non-flammable  
screening or warn them not to watch the arc nor expose themselves  
to the arc rays or to hot spatter or metal.  
HOT METAL can burn  
Electric arc welding operations cause sparks and hot metal to  
temperatures that can cause severe burns! Use protective  
gloves and clothing when performing any metal working operations.  
Make sure that all persons in the welding area are protected from  
heat, sparks and ultraviolet rays. Use additional face shields and  
flame resistant barriers as needed.  
Never touch work piece until completely cooled.  
ELECTRIC AND MANGETIC FIELDS may be dangerous  
The electric magnetic field that is generated during arc  
welding may interfere with the operation of various electrical and  
electronic devices such as cardiac pacemakers. Persons using such  
devices should consult with their physician prior to performing any  
electric welding operations .Exposure to electromagnetic fields during  
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welding may have other health effects, which are not known.  
Model  
MIGWELD200S  
220V/1Phase  
Rated Input Voltage  
Frequency (Hz)  
No-Load Loss  
50/60  
50W  
Efficiency  
0.80  
Power Factor  
0.73  
No-load output voltage  
50-80V  
Rated Input Current  
Output Voltage  
37.4A  
15.5-24V  
30-200A  
60%@200A/24V  
38.1A  
adjustment Range  
MIG  
Output Current Range  
Load Duty Cycle  
Rated Input Current  
Output Voltage  
21.2-27.2V  
30-180A  
60%@180A/27.2V  
YES  
STICK  
Output Current Range  
Load Duty Cycle  
Anti-sticking Function  
Protection Class  
IP21  
Cooling method  
Standard  
Size  
Fan-cooled  
GB15799.1-2004  
Weight  
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OPERATION AND CONTROLS  
Diagram of panel  
1. QC/STICK/MIG Indicator  
Light indicators which demonstrate which welding process is selected and if the duty cycle has been  
reached.  
2. MIG/ STICK Selction Knob  
Allows easy selection of the welding process desired.  
3. Wire Feed/ Spool Gun Knob  
Easily switches between the wire feed and spool gun functions of the MigWeld 200S  
4. Voltage/ Arc Force Knob  
When the unit is in MIG mode, this knob adjusts the welding voltage. If the unit is in STICK mode,  
the knob adjusts the amount of arc force.  
5. Wire Speed / Stick Amps  
Allows the user to control the wire speed function when in MIG mode or to adjust the amperage  
when in STICK mode  
6. Wave Form  
Controls arc characteristics while in MIG mode only. Lower wave form settings make the arc  
softer with less weld spatter. Higher wave form settings give a stronger driving arc which can  
increase weld penetration.  
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OPERATION AND CONTROLS  
Operation and controls  
1. Set the power switch of the welding machine at "ON” position, open the valve of gas cylinder and  
adjust the flow meter to required setting.  
2. Select the diameter of welding wire on welding feeding machine according to specified value.  
3. Select bore diameter of welding torch contact tube according to diameter of wire.  
4. According to the thickness, adjust VOLTAGE knob and SPEED knob to required position.  
5. Press the switch on welding torch to make the welding wire extend out of gun head, and then the  
machine is ready to work.  
6. Reference table for welding conditions  
Thickn  
ess  
(mm)  
Diameter of  
wire  
Welding  
current  
range (A)  
Applicable to OUR  
welding machine's  
model  
Welding  
method  
Parent metal  
(Φ)  
Carbon steel,  
common low  
alloy steel  
0.8-8.0  
CO2/MAG  
0.8/1.0/1.0  
60--230  
MigWeld 200S  
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Set-up for using MIG function:  
Power supply  
CO2 meter  
CK  
STI  
ON  
Gas  
OFF  
AC 220V  
50/60Hz  
cylinder  
CO2  
Back  
Earth clamp  
Work piece  
Mig torch  
Set-up for using Spool Gun Function:  
Power supply  
meter  
STICK  
ON  
Gas  
OFF  
AC 220V  
50/60Hz  
cylinder  
CO2  
Back  
Earth clamp  
Work piece  
Pull mig torch  
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Set-up for using Stick welding function:  
Power supply  
ICK  
ST  
MIG  
ON  
OFF  
AC 220V  
50/60Hz  
CO2  
Back  
Earth clamp  
Work piece  
Electrode holder  
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Operation  
1. Turn the power switch to the “ON” setting, the LCD display will show set current volume and the  
cooling fan will beginning to revolve.  
2. Adjust the Voltage/ Arc Force Knob and the Wire Speed / Stick Amps according to your needs.  
3. Generally, welding current is adequate to welding electrode according with as following:  
Specification  
Current  
φ2.5  
φ3.2  
φ4.0  
φ5.0  
70-100A  
110-140A  
170-220A  
230-280A  
4. The Arc Force knob is used to adjust welding function, specially in low current arrange, that is  
cooperated with knob of welding current adjustment, they may adjust current of arc striking and be  
out of control of knob of welding current adjustment .So machine can grain powerful energy and push  
current can achieve effect that may.  
5. VRD equipment is installed in the machine. When the switch of back panel is put "ON" position, the  
VRD indictor is lit and the no-load voltage changes to be less than 15V, which is safe for people; and  
when the switch is put "OFF" position, the VRD indicator is off.  
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LONGEVITY® Global, Inc. thanks you for your purchase and the opportunity to be able to serve you. If, after  
reviewing this manual, you have any problems in setting up or operating your machine, contact us  
LONGEVITY® Global, Inc.  
Toll-Free 1-877-LONG-INC / 1-877-566-4462  
Customer Service: [email protected]  
Please join our welding forums to share welding tips and tricks, to receive useful information from customers who  
also use our products, and to be a part of the LONGEVITY® welding community at www.freeweldingforum.com  
For the coolest LONGEVITY sponsored race teams plus a complete racing forum that covers everything from Drag  
Racing to RC Car Racing, please check out www.longevity-racing.com!  
Enjoy your new welding machine from LONGEVITY! Thanks again!  
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