Würth EWI 160 User manual

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EWI 160 / EWI 200
ARC/TIG INVERTER WELDERS
General safety rules
WARNING: Read and understand all instructions. Failure to follow all instructions
listed below may result in serious injury.
CAUTION: Do not allow persons to operate or assemble this EWI series unit
until they have read this manual and have developed a thorought understanding
of how the EWI series welder works.
WARNING: The warnings, cautions, and instructions discussed in this
instruction manual cannot cover all possible conditions or situations that could
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 performed by the operator.
SAVE THESE INSTRUCTIONS
IMPORTANT SAFETY CONSIDERATIONS
1.1 Your Welding Environment
- Keep the environment you will be welding in free from flammable materials.
- Always keep a fire extinguisher accessible to your welding environment.
- Always have a qualified person install and operate this equipment.
- Make sure the area is clean, dry and ventilated. Do not operate the welder in humid, wet or poorly
ventilated areas.
- Always have your welder maintained by a qualified technician in accordance with local, state and
national codes.
- Always be aware of your work environment. Be sure to keep other people, especially children, away
from you while welding.
- Keep harmful arc rays shielded from the view of others.
- Mount the welder on a secure bench or cart that will keep the welder secure and prevent it from
tipping over or falling.
GB

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1.2 Your Welder’s Condition
- Check ground cable, power cord and welding cable to be sure the insulation is not damaged. Always
replace or repair damaged components before using the welder.
- Check all components to ensure they are clean and in good operating condition before use.
1.3 Use of Your Welder
CAUTION
Do not operate the welder if the output cable, electrode, torch, wire or wire feed system is wet. Do not
immerse them in water. These components and the welder must be completely dry before attempting to
use them.
- Follow the instructions in this manual.
- Keep welder in the off position when not in use.
- Connect ground lead as close as possible to the area being welded to ensure a good ground.
- Do not allow any of your body parts to come in contact with the welding wire if you are in contact
with the material being welded, ground or electrode from another welder.
- Do not weld if you are in an awkward position. Always have a secure stance while welding to prevent
accidents. Wear a safety harness if working above ground.
- Do not sling cables over, or wrap them around your body.
- Wear a full coverage helmet with appropriate shade (see ANSI Z87.1 safety standard) and safety
glasses while welding.
- Wear proper gloves and protective clothing to prevent your skin from being exposed to hot metals,
UV and IR rays.
- Do not overuse or overheat your welder. Allow proper cooling time between duty cycles.
- Keep hands and fingers away from moving parts and stay away from the drive rolls.
- Do not point torch at any of your body parts or anyone else's.
- Always use this welder in the rated duty cycle to prevent excessive heat and failure.
1.4 Specific Areas of Danger, Caution or Warning
Electrical Shock
WARNING
Electric arc welders can produce a shock that can cause injury or death. Touching
electrically live parts can cause fatal shocks and severe burns. While welding, all metal
components connected to the wire are electrically hot. Poor ground connections are a hazard, so
secure the ground lead before welding.
- Wear dry protective apparel: coat, shirt, gloves and insulated footwear.
- Insulate yourself from the work piece. Avoid contacting the work piece or ground.
- Do not attempt to repair or maintain the welder while the power is on.

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- Inspect all cables and cords for any exposed wire and replace immediately if found.
- Use only recommended replacement cables and cords.
- Always attach ground clamp to the work piece or work table as close to the weld area as possible.
- Do not touch the welding wire and the ground or grounded work piece at the same time.
- Do not use a welder to defrost frozen pipes.
Fumes and Gases
WARNING
- Fumes emitted from the welding process displace clean air and can result in injury or death.
- Do not breathe in fumes emitted by the welding process. Make sure your breathing air is clean and
safe.
- Work only in a well-ventilated area or use a ventilation device to remove welding fumes from the
environment where you will be working.
- Do not weld on coated materials (galvanized, cadmium plated or metals containing zinc, mercury or
barium). They will emit harmful fumes that are dangerous to breathe. If necessary use a ventilator,
respirator with air supply or remove the coating from the material in the weld area.
- The fumes emitted from some metals when heated are extremely toxic. Refer to the material safety
data sheet for the manufacturer’s instructions.
- Do not weld near materials that will emit toxic fumes when heated. Vapors from cleaners, sprays and
degreasers can be highly toxic when heated.
UV and IR Arc Rays
DANGER .
The welding arc produces ultraviolet (UV) and infrared (IR) rays that can cause injury to
your eyes and skin. Do not look at the welding arc without proper eye protection.
- Always use a welding mask (helmet) that covers your full face from the neck to top of head and to the
back of each ear.
- Ensure that mask is fitted with appropriate shade lens that meets ANSI standards as well as with safety
plate. For Welders under 160 Amps output, use a shade 10 lens; for above 160 Amps, use a shade
12. For more information refer to the ANSI Z87.1 standard.
- Cover all bare skin areas exposed to the arc with protective clothing and footware. Flame-retardant
cloth or leather shirts, coats, pants or coveralls are available for protection.
- Use welding protection curtains or other barriers to protect other people from the arc rays emitted
when welding.
- Warn people in your welding area when you are going to strike an arc so they can protect themselves.

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Fire Hazards
WARNING
Do not weld containers or pipes that contain or have had flammable, gaseous or liquid
combustibles in them. Welding creates sparks and heat that can ignite flammable and
explosive materials.
- Do not operate any electric arc welder in areas where flammable or explosive materials are present.
- Remove all flammable materials at least 10 m away from the welding arc. If removal is not possible,
tightly cover them with fireproof covers.
- Take precautions to ensure that flying sparks do not cause fire or explosion in hidden areas, cracks
or areas you cannot see.
- Keep a fire extinguisher readily accessible in case of fire.
- Wear oil-free clothing with no pockets or cuffs that might collect sparks (sparking debries).
- Do not carry in your pockets any combustible items such as lighters or matches.
- Keep the earth lead connected as close as possible to the welding place to prevent any unknown,
unintended paths of electrical current that might cause electrical shock and fire hazard.
Hot Materials
CAUTION
Welded materials are hot and can cause severe burns if handled improperly.
- Do not touch welded materials with bare hands.
- Do not touch TIG gun nozzle after welding until it has had time to cool down properly.
Sparks/Flying Debris
CAUTION
Welding creates hot sparks that can cause injury. Chipping slag creates flying debris.
- Wear protective gear at all times: ANSI-approved safety glasses or shield, welder’s mask
(helmet) and ear plugs to prevent spark injuries of your eyes, face, ears and hair.
Electromagnetic Field
CAUTION
- Electromagnetic fields can interfere with various electrical and electronic devices such
as pacemakers.
- Consult your doctor before using any electric arc welder or cutting device.
- Keep people with pacemakers away from your welding area when welding.
- Do not wrap cable around your body while welding.
- Wrap TIG gun cable and ground cable together whenever possible.
- Keep TIG gun cable and ground cables on the same side of your body.

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Shielding Gas Cylinders Can Explode
WARNING
High pressure cylinders can explode if damaged, so treat them carefully.
- Never expose cylinders to high heat, sparks, open flames, mechanical shocks or arcs.
- Do not touch the cylinder with TIG gun.
- Do not weld on the cylinder.
- Always secure cylinder upright to a cart or stationary object.
- Keep cylinders away from welding or electrical circuits.
- Use the proper regulators, gas hose and fittings for the specific application.
- Do not look into the valve when opening it.
- Use protective cylinder cap whenever possible.
1.5 Proper Care, Maintenance and Repair
DANGER .
- Always have power disconnected when working on internal components.
- Do not touch or handle PC board without being properly grounded with a wrist strap. Put PC board
in static proof bag prior to moving or shipping it.
- Do not put hands or fingers near moving parts such as fan.

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Description
The EWI series is a DC inverter ARC welder. This unit uses
1~Phase 220V/230V/240V, 50/60HZ AC power. A
16 amp time delay fuse or circuit breaker is
recommended. Sticks (electrodes) can weld carbon steel
and stainless steel.
Unpacking
1.1 Open cardboard box, bags or styrofoam packaging containing the welder and
accessories
1.2 Check that contents is as in the list below
ITEM QTY.
DC Inverter Arc Welder 1 unit
Welding cable with electrode holder 1 pc
Grounding cable with earth clamp 1 pc
Operator’s Manual 1 set
1.3 After unpacking unit
Inspect carefully for any damage that may have occurred during transit. Check for loose, missing, or
damaged parts. In case of shipping damage contact carrier immediately.

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Specifications and Dimension
Description Specification
Model EWI 160
Input power V 220 230 240
Frequency Hz 50/60 50/60 50/60
Rated input current A 30 30 29
Rated input capacity KVA 6.9 6.9 6.9
No-load voltage V 75 78 80
Rated working voltage V 26.4 26.4 26.4
MMA welding current A 20～160 20～160 20～160
Rated duty cycle % 20 20 20
Welding current（10min）
A
20%@160 20%@160 20%@160
10min/100% A 72 72 72
Efficiency η 85% 85% 85%
Power factor Cosφ 0.65 0.65 0.65
Insulation class H H H
Enclosure protection IP 21S 21S 21S
Cooling method Fan cooled Fan cooled Fan cooled
Dimension L×W×H cm 38×12×25.5 38×12×25.5 38×12×25.5
Weight kg 4.6 4.6 4.6

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Description Specification
Model EWI 200
Input power V 220 230 240
Frequency Hz 50/60 50/60 50/60
Rated input current A 40 40 38
Rated input capacity KVA 8.8 9.2 8.8
No-load voltage V 70 72 75
Rated working voltage V 28 28 28
MMA welding current A 20～200 20～200 20～200
Rated duty cycle % 20 20 20
Welding current（10min）
A
20%@200 20%@200 20%@200
10min/100% A 89 89 89
Efficiency η 85% 85% 85%
Power factor Cosφ 0.70 0.70 0.70
Insulation class H H H
Enclosure protection IP 21S 21S 21S
Cooling method Fan cooled Fan cooled Fan cooled
Dimension L×W×H cm 38×12×25.5 38×12×25.5 38×12×25.5
Weight kg 4.75 4.75 4.75

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Getting to Know your Welder
POWER INDICATOR
When the machine is turned on, the power indicator will be lit.
ALARM INDICATOR
When the thermal indictor is lit, it shows that the machine is overloaded and that the internal temperature
is too high. Welding output will turn off automatically, but the fan will still be working. When the internal
temperature is decreased, the overload light will turn off and the machine will be ready to weld.
WELDING CURRENT CONTROL
Welding current (amperage) control is placed on the front panel of machine.
WELDING CABLE
The welding cable is attached to electrode to complete the circuit, allowing the flow of current needed
to weld.
GROUNDING CABLE
The ground cable/clamp is attached to the workpiece to complete the circuit, allowing the flow of
current needed to weld.
Power Cord
Power Switch
Welding
cable
Power
Indicator
Welding
Current
control
Alarm
Indicator
Welding
Mode
Selector
Welding
Mode
Indicator
Grounding
cable

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POWER SWITCH
In the “OFF” position no power is being supplied.
In the “ON” position power is supplied to the mains transformer and control circuit.
POWER CORD
The power cord connects the welder to the 220/230/240 volt, 16 amp power supply mains socket
to supply power to the welder.