Impax IM-MULT160-K User manual

DECLA ATION OF CONFO MITY
After sales support: Tel: [phone] Website: www.impaxpowertools.com
1. Product model: IM-MULT160-K
2. Name and address of the manufacturer or his authorised representative:
NAP BRANDS LTD. Office 20, leming Court Business Centre,
Leigh Road, Eastleigh, Hampshire SO50 9YN
T
el: [phone]. Email: [email protected]
3. This declaration of conformity is issued under the sole responsibility of the manufacturer.
4. Object of the declaration:
Equipment: 160A MIG/TIG/MMA Welder
Brand name: IMPAX
Model/type: IM-MULT160-K
5. The object of the declaration described above is in conformity with the relevant statutory requirements:
6. References to the relevant designated standards used or references to the other technical
specifications in relation to which conformity is declared:
7. The person authorized to compile the technical file:
Name: Robert Redfern
Address: Nap Brands Ltd. Office 20, leming Court Business Centre, Leigh Road, Eastleigh,
Hampshire SO50 9YN
Signed for and on behalf of:
Authorised Representative
Robert Redfern, Technical Manager
03/03/2022
Supply of Machinery (Safety) Regulations 2008
Electrical Equipment (Safety) Regulations 2016
Electromagnetic Compatibility Regulations 2016
The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment
Regulations 2012
BS EN IEC 60974-1
BS EN IEC 60974-10
EN IEC 60974-1
EN IEC 60974-10
22

Always Read Instruction Manual
Retain for uture Reference
IM-MULT160-K
160A MIG/TIG/MMA WELDE

2
CE TIFICATE OF GUA ANTEE
This product is guaranteed for a period of 1 Year, with effect from the date of purchase and applies
only to the original purchaser. This guarantee only applies to defects arising from, defective materials
and or faulty workmanship that become evident during the guarantee period only and does not
include consumable items. The manufacturer will repair or replace the product at their discretion
subject to the following. That the product has been used in accordance with the guidelines as
detailed in the product manual and that it has not been subjected to misuse, abuse or used for a
purpose for which it was not intended. That it has not been taken apart or tampered with in any way
whatsoever or has been serviced by unauthorised persons or has been used for hire purposes.
Transit damage is excluded from this guarantee, for such damage the transport company is
responsible. Claims made under this guarantee must be made in the first instance, directly to the
retailer within the guarantee period. Only under exceptional circumstances should the product be
returned to the manufacturer. In this case it shall be the consumer’s responsibility to return the
product at their cost ensuring that the product is adequately packed to prevent transit damage and
must be accompanied with a brief description of the fault and a copy of the receipt or other proof of
purchase. The manufacturer shall not be liable for any special, exemplary, direct, indirect, incidental,
or consequential loss or damage under this guarantee. This guarantee is in addition to and does not
affect any rights, which the consumer may have by virtue of the Sale of Goods Act 1973 as
amended 1975 and 1999.
INT ODUCTION
Thank you for purchasing this product which has passed through our extensive quality assurance
process. Every care has been taken to ensure that it reaches you in perfect condition. However, in
the unlikely event that you should experience a problem, or if we can offer any assistance or advice
please do not hesitate to contact our customer care department. or details of your nearest
customer care department please refer to the telephone numbers at the back of this manual.
Safety First
Before attempting to operate this product the following basic safety precautions should always be
taken to reduce the risk of fire, electric shock and personal injury. It is important to read the
instruction manual to understand the application, limitations and potential hazards associated with
this product.
HELPLINE & SPA E PA TS
In the unlikely event of a defect occurring please contact our Helpline.
Office hours: Monday - riday 9:00am – 5:00pm.
Telephone Number 0344 264 2485

3
SAFETY INFO MATION
Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance.
Always read and obey all safety messages.
This is the safety alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol and either the word
“DANGER” or “WARNING.”
These words mean:
DANGER
WARNING
All safety messages will tell you what the potential hazard is, tell you how to reduce the chance
of injury, and tell you what can happen if the instructions are not followed.
DANGER indicates a hazardous situation which, if not avoided, will
result in death or serious injury.
WARNING indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION
NOTICE
CAUTION, used with the safety alert symbol, indicates a
hazardous situation which, if not avoided, could result in minor or
moderate injury.
NOTICE is used to address practices not related to personal injury.
CAUTION CAUTION, without the safety alert symbol, is used to address
practices not related to personal injury.
Before attempting to operate the machine, it is
essential that you read this manual thoroughly
and carefully follow all instructions given. In
doing so you will ensure the safety of yourself
and that of others around you, and you can also
look forward to the welder giving you long and
satisfactory service.
Important
Warning! If you have no welding experience, we
recommend you seek training from an
experienced person.
Caution: The pages of this manual are restricted
to the basic safe use of a MIG/TIG/MMA
welding power supply and very basic welding
technique. We recommend you purchase a good
quality publication on welding or if you have
internet access visit one of the numerous
welding related web sites to be able to use the
welding power supply to its full potential.
The electrodes used in welding are many and
varied. You are advised to seek advice from your
local welding equipment supplier for the correct
selection of wire electrode for the work being
performed.
THE QUALITY OF ANY WELDED OINT IS
DEPENDANT ON THE PREPARATION OF THE
OINT THE SELECTION OF THE CORRECT
WIRE ELECTRODE AND THE SKILL AND
EXPERIENCE OF THE WELDER.

SAFETY INFO MATION
4
General Welding Safety
The Workshop Environment
Housekeeping is extremely important to avoid
injury from slips, trips and falls, damage to
equipment and fire. The work area should be
kept clean and tidy at all times. Combustible
materials must not be discarded or stored in the
vicinity of the welding area.
Avoid using your welder in the vicinity of:
a) other supply cables, control cables, signalling
and telephone cables; above, below and
adjacent to the welding equipment;
b) radio and television transmitters and
receivers;
c) computer and other control equipment;
d) safety critical equipment, e.g. guarding of
industrial equipment;
e) pacemakers and hearing aids etc.;
f) equipment used for calibration or
measurement;
g) other equipment in the environment. The user
shall ensure that other equipment being used
in the environment is compatible. This may
require additional protection measures;
It may be possible to avoid the above by
changing the time of day that welding or other
activities are to be carried out.
The size of the surrounding area to be
considered will depend on the structure of the
building and other activities that are taking
place. The surrounding area may extend beyond
the boundaries of the premises.
Electrical Safety
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.
1. Do not touch live electrical parts.
2. Wear dry, hole-free insulating gloves and
body protection.
3. Insulate yourself from work and ground
using dry insulating mats or covers.
4. Disconnect input power or stop engine
before installing or servicing this equipment.
Lock input power disconnect switch open,
or remove line fuses so power cannot be
turned on accidentally.
5. Properly install and ground this equipment
according to its Owner’s Manual and
national, state, and local codes.
6. Turn off all equipment when not in use.
Disconnect power to equipment if it will be
left unattended or out of service.
7. Use fully insulated electrode holders. Never
dip holder in water to cool it or lay it down
on the ground or the work surface. Do not
touch holders connected to two welding
machines at the same time or touch other
people with the holder or electrode.
8. Do not use worn, damaged, undersized, or
poorly spliced cables.
9. Do not wrap cables around your body.
10. Ground the workpiece to a good electrical
(earth) ground.
11. Do not touch electrode while in contact with
the work (ground) circuit.
12. Use only well-maintained equipment. Repair
or replace damaged parts at once.
13. In confined spaces or damp locations, do
not use a welder with AC output unless it is
equipped with a voltage reducer. Use
equipment with DC output.
14. Wear a safety harness to prevent falling if
working above floor level.
15. Keep all panels and covers securely in
place.

5
SAFETY INFO MATION
Shock Prevention
Exposed live conductors or other bare metal in
the welding circuit, or in unearthed, electrically-
LIVE equipment can fatally shock a person
whose body becomes a conductor. DO NOT
STAND, SIT, LIE, LEAN ON, OR TOUCH a wet
surface when welding, without suitable
protection.
Protection for Wearers of Pacemakers
Magnetic fields from high currents can affect
pacemaker operation. Persons wearing
electronic life support equipment (pacemaker)
should consult with their doctor before going
near arc welding, gouging, or spot welding
operations.
To Prevent Against Shock
Keep body and clothing dry. Never work in
damp area without adequate insulation against
electrical shock. Stay on a dry duckboard, or
rubber mat when dampness or sweat can not
be avoided. Sweat, sea water, or moisture
between body and an electrically LIVE part - or
earthed metal - reduces the body surface
electrical resistance, enabling dangerous and
possibly lethal currents to flow through the
body.
Earthing the Equipment
When arc welding equipment is earthed
according to the National Electrical Code, and
the workpiece is earthed, a voltage may exist
between the electrode and any conducting
object.
Examples of conducting objects include, but are
not limited to, buildings, electrical tools, work
benches, welding power source cases,
workpieces, etc.
Never touch the electrode and any metal object
unless the welding power source is off. When
installing, connect the frames of each unit such
as welding power source, control, work table,
and water circulator to the building earth.
Conductors must be adequate to carry earth
currents safely. Equipment made electrically
LIVE by stray current may shock, possibly
fatally. Do NOT EARTH to electrical conduit, or
to a pipe carrying ANY gas or a flammable liquid
such as oil or fuel.
Electrode Holders
ully insulated electrode holders should be
used. Do NOT use holders with protruding
screws or with any form of damage.
Connectors
ully insulated lock-type connectors should be
used to join welding cable.
Cables
requently inspect cables for wear, cracks and
damage. IMMEDIATELY REPLACE those with
excessively worn or damaged insulation to avoid
possibly lethal shock from bared cable. Cables
with damaged areas may be taped to give
resistance equivalent to original cable. Keep
cable dry, free of oil and grease, and protected
from hot metal and sparks.
Terminals And Other Exposed Parts
Terminals and other exposed parts of electrical
units should have insulating covers secured
before operation.
Electrode
Equipment With Output On/Off Control
(Contactor)
Welding power sources for use with the gas
metal arc welding, gas tungsten arc welding and
similar processes normally are equipped with
devices that permit on/off control of the welding
power output. When so equipped the electrode
wire becomes electrically LIVE when the power
source switch is ON and welding gun switch is
closed. Never touch the electrode wire or any
conducting object in contact with the electrode
circuit unless the welding power source is off.
Equipment Without Output On/Off Control
(No Contactor)
Welding power sources used with shielded
metal arc welding and similar processes may
not be equipped with welding power output
on/off control devices. With such equipment the
electrode is electrically LIVE when the power
switch is turned ON. Never touch the electrode
unless the welding power source is off.

SAFETY INFO MATION
6
Changing Electrodes
The electrode holder should be isolated when
changing the electrode, where a work piece is
earthed. If the electrode is changed without
isolating the electrode holder, the welder is
relying on the insulation properties of the glove
to avert shock from the OCV (Open Circuit
Voltage) which can be 80V between the
electrode and earth. If the glove is wet, the
electrode a bad insulator or the welder in
contact with a conductive surface, one or more
of these layers of insulation may be ineffective.
Safety Devices
Safety devices such as interlocks and circuit
breakers should not be disconnected or shunted
out. Before installation, inspection, or service of
equipment, shut O all power and remove line
fuses (or lock or red-tag switches) to prevent
accidental turning ON of power. Do not open
power circuit or change polarity while welding. If,
in an emergency, it must be disconnected,
guard against shock burns, or flash from switch
arcing.
Always shut O and disconnect all power to
equipment. Power disconnect switch must be
available near the welding power source.
Checking the Equipment
Check that the equipment is suitable for the
operation and connected in accordance with the
manufacturer's recommendations. The welder is
responsible for checking the equipment (cable,
electrode holder and coupling devices) daily for
damage and defects. All external connections
should be clean and tight and checked each
time a reconnection is made. The welding return
clamp should be connected directly to the work
piece, as close as possible to the point of
welding or to the metal work bench on which
the work piece is placed. Any damaged or
defective parts must be replaced before
continuing the welding operation.
Fumes And Gases
The welding process vapourises
metals, and anything that is resting
on the surface. This gives rise to
fumes, which is condensed fine
particulate material. The fume is
mostly oxides of the metals, including any
alloying elements, but it also contains gases
produced in the arc, such as ozone or oxides of
nitrogen, and decomposition products from any
paint or coating which was on the metal
surface. The nature and quantity of this fume
depends critically upon the welding process, the
materials and the welding parameters.
Severe discomfort, illness or death can result
from fumes, vapours, heat, or oxygen
enrichment or depletion that welding (or cutting)
may produce. Prevent them with adequate
ventilation. NEVER ventilate with oxygen. Lead,
cadmium, zinc, mercury and beryllium, bearing
materials, when welded (or cut) may produce
harmful concentrations of toxic fumes. Adequate
local exhaust ventilation must be used, or each
person in the area as well as the operator must
wear an airsupplied respirator. or beryllium,
both must be used. Metals coated with or
containing materials that emit toxic fumes
should not be heated unless coating is removed
from the work surface, the area is well
ventilated, or the operator wears an air-supplied
respirator. Work in a confined space only while it
is being ventilated and, if necessary, while
wearing an air-supplied respirator. Vapours from
chlorinated solvents can be decomposed by the
heat of the arc (or flame) to form PHOSGENE, a
highly toxic gas, and other lung and eye
irritating products. The ultraviolet (radiant)
energy of the arc can also decompose
trichloroethylene and perchloroethylene vapours
to form phosgene. DO NOT WELD or cut where
solvent vapours can be drawn into the welding
or cutting atmosphere or where the radiant
energy can penetrate to atmospheres containing
even minute amounts of trichloroethylene or
perchloroethylene.
1. Keep your head out of the fumes. Do not
breath the fumes.
2. If inside, ventilate the area and/or use
exhaust at the arc to remove welding fumes
and gases.
3. If ventilation is poor, use an approved air-
supplied respirator.
4. Read the Material Safety Data Sheets
(MSDSs) and the manufacturer’s instruction
for metals, consumables, coatings, and
cleaners.

7
SAFETY INFO MATION
5. Work in a confined space only if it is well
ventilated, or while wearing an air-supplied
respirator.
Shielding gases used for welding can
displace air causing injury or death. Be sure
the breathing air is safe.
6. 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.
7. 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 airsupplied
respirator. The coatings and any metals
containing these elements can give off toxic
fumes if welded.
Noise
Welding environments are frequently
noisy as other operations such as
grinding, etc. may also be taking
place. Some operations, such a de-
slagging may take the noise up to
such a level where it will damage hearing. In
such cases hearing protection must be used.
Fire and Explosion Prevention
Causes of fire and explosion are:
1) combustibles reached by the arc,
flame, flying sparks, hot slag or
heated material;
2) misuse of compressed gases and cylinders;
3) short circuits.
BE AWARE THAT flying sparks or falling slag can
pass through cracks, along pipes, through
windows or doors, and through wall or floor
openings, out of sight of the goggled operator.
Sparks and slag can fly 10M.
To prevent fires and explosion: keep equipment
clean and operable, free of oil, grease, and (in
electrical parts) of metallic particles that can
cause short circuits.
If combustibles are in area, do NOT weld or cut.
Move the work if practicable, to an area free of
combustibles.
Avoid paint spray rooms, dip tanks, storage
areas, ventilators. If the work cannot be moved,
move combustibles at least 10M, away out of
reach of sparks and heat; or protect against
ignition with suitable and snug fitting, fire-
resistant covers or shields.
Walls, ceilings, and floor near work should be
protected by heat resistant covers or shields.
ire watcher must be standing by with suitable
fire extinguishing equipment during and for
some time after welding or cutting if:
a) appreciable combustibles (including building
construction) are within 10m.
b) appreciable combustibles are further than
10m but can be ignited by sparks.
c) openings (concealed or visible) in floors or
walls within 10m can expose combustibles to
sparks.
d) combustibles adjacent to walls, ceilings, roofs
or metal partitions can be ignited by radiant
or conducted heat.
After work is done, check that area is free of
sparks, glowing embers, and flames.
An empty container that held combustibles, or
that can produce flammable or toxic vapours
when heated, must never be welded on or cut,
unless container has first been cleaned. This
includes a thorough steam or caustic cleaning
(or a solvent or water washing, depending on
the combustible’s solubility) followed by purging
and inerting with nitrogen or carbon dioxide,
and using protective equipment.
Water filling just below working level may
substitute for inerting.
A container with unknown contents should be
cleaned (see paragraph above), do NOT depend
on sense of smell or sight to determine if it is
safe to weld or cut.
Hollow castings or containers must be vented
before welding or cutting - they can explode.
In explosive atmospheres, never weld or cut
where the air may contain flammable dust, gas,
or liquid vapours.

SAFETY INFO MATION
8
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.
1. Protect compressed gas cylinders from
excessive heat, mechanical shocks, and
arcs.
2. Install and secure cylinders in an upright
position by chaining them to a stationary
support or equipment cylinder rack to
prevent falling or tipping.
3. Keep cylinders away from any welding or
other electrical circuits.
4. Never allow a welding electrode to touch
any cylinder.
5. Use only correct shielding gas cylinders,
regulators, hoses, and fittings designed for
the specific application; maintain them and
associated parts in good condition.
6. Turn face away from valve outlet when
opening cylinder valve.
7. Keep protective cap in place over valve
except when cylinder is in use or connected
for use.
Welding Can Cause Fire Or Injury
Sparks and spatter fly off from the
welding arc. The flying sparks and
hot metal, weld spatter, hot
workpiece, and hot equipment
can cause fires and burns.
Accidental contact of electrode or welding
wire to metal objects can cause sparks,
overheating, or fire.
1. Protect yourself and others from flying
sparks and hot metal.
2. Do not weld where flying sparks can strike
flammable material.
3. Remove all flammables within 35 ft (10.7 m)
of the welding arc. If this is not possible,
tightly cover them with approved covers.
4. Be alert that welding sparks and hot
materials from welding can easily go
through small cracks and openings to
adjacent areas.
5. Watch for fire, and keep a fire extinguisher
nearby.
6. Be aware that welding on a ceiling, floor,
bulkhead, or partition can cause fire on the
hidden side.
7. Do not weld on closed containers such as
tanks or drums.
8. 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.
9. Do not use welder to thaw frozen pipes.
10. Remove stick electrode from holder or cut
off welding wire at contact tip when not in
use.
11. When not welding, make certain no part of
the electrode circuit is touching the work or
ground. Accidental contact can cause
overheating and create a fire hazard.
Moving Parts Can Cause Inury
Moving parts, such as fans,
rotors, and belts can cut fingers
and hands and catch loose
clothing.
1. Keep all doors, panels, covers, and guards
closed and securely in place.
2. Stop engine before installing or connecting
unit.
3. Have only qualified people remove guards
or covers for maintenance and
troubleshooting as necessary.
4. To prevent accidental starting during
servicing, disconnect negative (-) battery
cable from battery.
5. Keep hands, hair, loose clothing, and tools
away from moving parts.
6. Reinstall panels or guards and close doors
when servicing is finished and before
starting engine.

9
SAFETY INFO MATION
Sparks Can Cause Battery Gases To Explode
SPARKS can cause BATTERY
GASES TO EXPLODE; BATTERY
ACID can burn eyes and skin.
Batteries contain acid and
generate explosive gases.
1. Always wear a face shield when working on
a battery.
2. Stop engine before disconnecting or
connecting battery cables.
3. Do not allow tools to cause sparks when
working on a battery.
4. Do not use welder to charge batteries or
jump start vehicles.
5. Observe correct polarity (+ and –) on
batteries.
Flying Sparks Can Cause Injury
FLYING SPARKS AND HOT METAL
can cause injury.
Chipping and grinding cause
flying metal.
As welds cool, they can throw off slag.
1. Wear approved face shield or safety
goggles. Side shields recommended.
2. Wear proper body protection to protect skin.
Steam And Pressurised Hot Coolant Can
Burn
STEAM AND PRESSURIZED HOT
COOLANT can burn face, eyes,
and skin.
The coolant in the radiator can be
very hot and under pressure.
1. Do not remove radiator cap when engine is
hot. Allow engine to cool.
2. Wear gloves and put a rag over cap area
when removing cap.
3. Allow pressure to escape before completely
removing cap.
Falling Unit Can Cause Injury
1. Lift unit with handle on top of
case.
2. Use handcart or similar device of
adequate capacity.
3. If using a fork lift vehicle, place and secure
unit on a proper skid before transporting.
Optical Radiation
The welding process produces a
large quantity of visible light,
ultraviolet and infrared. Exposure
to the radiation from an arc
causes damage to the eyes (Arc
Eye). or this reason, welders need to wear
efficient eye protection, which is usually
supplied in the form of a protective shield.
The precise choice of the shade of glass filter in
these shields depends on the type of welding
operation, since they vary in their light output.
ARC RAYS can burn eyes and skin; NOISE
can damage hearing.
Arc rays from the welding process produce
intense heat and strong ultraviolet rays that
can burn eyes and skin. Noise from some
processes can damage hearing.
1. Wear a welding helmet fitted with a proper
shade of filter (ANSI Z49.1) to protect your
face and eyes when welding or watching.
2. Wear approved safety glasses. Side shields
recommended. Never wear contact lenses
while welding.
3. Use protective screens or barriers to protect
others from flash and glare; warn others not
to watch the arc.
4. Wear protective clothing made from durable,
flame-resistant material (wool and leather)
and foot protection.
5. Use approved ear plugs or ear muffs if noise
level is high

SAFETY INFO MATION
10

11
SAFETY INFO MATION
H.F. Radiation Can Cause Interference
1. High-frequency (H. .) can
interfere with radio navigation,
safety services, computers,
and communications equipment.
2. Have only qualified persons familiar with
electronic equipment install, test, and
service H. . producing units.
3. The user is responsible for having a qualified
electrician promptly correct any interference
problem resulting from the installation.
4. If notified by the CC about interference,
stop using the equipment at once.
5. Have the installation regularly checked and
maintained.
6. 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.
Electric And Magnetic Fields May Be
Dangerous
1. Electric current flowing through
any conductor causes localized
Electric and Magnetic ields
(EM ). Welding current creates
EM fields around welding cables
and welding machines
2. EM fields may interfere with some
pacemakers, and welders having a
pacemaker should consult their physician
before welding.
3. Exposure to EM fields in welding may have
other health effects which are now not
known.
4. All welders should use the following
procedures in order to minimize exposure to
EM fields from the welding circuit:
5. Route the electrode and work cables
together - Secure them with tape when
possible.
6. Never coil the electrode lead around your
body.
7. Do not place your body between the
electrode and work cables. If the electrode
cable is on your right side, the work cable
should also be on your right side.
8. Connect the work cable to the workpiece as
close as possible to the area being welded.
9. Do not work next to welding power source.
For Electrically Powered Equipment
1. Turn off input power using the
disconnect switch at the fuse
box before working on the
equipment.
2. Install equipment in accordance with the
countries National Electrical Code, all local
codes and the manufacturer’s
recommendations.
3. Ground the equipment in accordance with
the countries National Electrical Code and
the manufacturer’s recommendations.
Hot Parts Can Cause Severe Burns
1. Do not touch hot parts bare
handed.
2. Allow cooling period before
working on welding gun or torch.
Fire Or Explosion Hazard
1. Do not place unit on, over, or
near combustible surfaces.
2. Do not service unit near
flammables.
Static Can Damage PC Boards
1. Put on grounded wrist strap
BE ORE handling boards or
parts.
2. Use proper static-proof bags and
boxes to store, move, or ship PC
boards.
Overuse Causes Overheating
1. Allow cooling period; follow rated
duty cycle.
2. Reduce current or reduce duty
cycle before starting to weld
again.
3. Do not block or filter airflow to unit.

SAFETY INFO MATION
12
Specific Safety Instructions
Use the welding power supply as indicated in
the instruction manual. Improper use of this
welding power supply can be dangerous for
persons, animals or objects.
The user of the welding power supply is
responsible for his own safety and the safety of
others. It is important to read and understand
this instruction manual.
Repair and maintenance must be carried out by
qualified persons.
Maintain the machine in good condition (keep
clean and dry etc).
During welding do not locate the machine in a
confined space or close to a wall, which will
block air outlets.
Avoid stretching the supply cable, disconnect
from the mains supply before moving the
machine.
Keep welding cables, earth clamp and electrode
holder in good condition.
Welders should not wear jewellery (especially
rings) or metallic watch straps
Appropriate clothing should be worn. Gloves,
boots and overalls will provide some protection
from electric shock
The welder should check daily, and after each
reconnection, that all external connections are
clean and tight
When changing the electrode, the electrode
holder should be isolated
When welding stops for a short time, the
electrode holder should not be put on the face
shield or flammable material as it may still be
'live' at 80V or hot enough to cause damage
Arc welding produces fumes, sparks and fused
metal projectiles.
Remove all flammable substances and materials
from the work area.
Ensure adequate ventilation in areas where
welding is being performed.
Do not weld on containers or pipes that hold or
have held flammable liquid or gases (danger of
explosion) or on materials cleaned with
chlorinated solvents or on varnished surfaces
(danger of toxic fumes).
Remove all flammable materials from the work
area.
Ensure there is adequate fire fighting equipment
close by.
Avoid direct contact with welding circuit, the
OCV (Open Circuit Voltage) between the
electrode and the earth clamp can be
dangerous.
Do not use the welding power supply in damp
or wet places or weld in the rain.
Always protect your eyes with an approved face
mask. Use gloves and proper protective clothing
which are dry and not soiled by oil or grease.
Avoid exposing skin to the ultra violet rays
produced by the arc.
Working in the Open Air
When welding outside, the equipment should
have the appropriate level of waterproofing; see
manufacturer's Rating Plate (IP) codes for
enclosures:
IP 23 protection against limited spraying
IP 24 protection against spraying from all
directions
If there is a risk of heavy rain, a cover for the
welding power supply, equipment and workpiece
should be in place.
Additional Safety Instructions
1. ALWAYS ensure that there is full free air
circulating around the outer casing of the
machine, and that the louvres are
unobstructed.
2. ALWAYS use a proper welding face shield
or helmet, with suitable filter lenses. Proper
gloves and working clothes should be worn
at all times.
3. ALWAYS check that the pressure regulator
and gauges are working correctly. DO NOT
lubricate the regulator.

13
SAFETY INFO MATION
4. ALWAYS use the correct regulator. Each
regulator is designed to be used with a
specific gas.
5. ALWAYS inspect the hose before use to
ensure it is in good condition.
6. ALWAYS keep the free length of gas hose
outside the work area.
7. ALWAYS remove all flammable materials
from the welding area.
8. NEVER remove any of the panels unless the
machine is disconnected from the supply,
AND never use the machine with any of the
panels removed.
9. NEVER attempt any electrical or mechanical
repair unless your are a qualified technician.
If you have a problem with the machine
contact your local IMPAX dealer.
10. NEVER use or store in a wet/damp
environment. DO NOT EXPOSE TO RAIN.
11. NEVER use gas from a cylinder, the content
of which is unknown. It is important to
ensure the appropriate gas is being used.
12. NEVER use a damaged cylinder.
13. NEVER lift the cylinder by the valve.
14. NEVER expose the cylinder to a heat source
or sparks.
15. NEVER continue to weld, if, at any time, you
feel even the smallest electric shock. Stop
welding IMMEDIATELY, and DO NOT
attempt to use the machine until the fault is
diagnosed and corrected.
16. NEVER use the welder with input
connections greater than 10M in length.
17. NEVER point the torch at any person or
animal.
18. NEVER touch the torch nozzle until the
welder is switched O and the nozzle has
been allowed to cool off.
19. NEVER connect, disconnect, or attempt to
service the torch, until the machine is
switched O and disconnected from the
mains supply.
20. NEVER allow the cables to become
wrapped around the operator or any person
in the vicinity.
21. Safety devices such as interlocks and circuit
breakers should not be disconnected or
shunted out.
22. Before installation, inspection, or service of
equipment, shut O all power and remove
line fuses to prevent accidental turning ON
of power.
23. Do not open power circuit or change
polarity while welding.
24. If, in an emergency, it must be
disconnected, guard against shock burns, or
flash from switch arcing. Always shut O
and disconnect all power to equipment.
Power disconnect switch must be available
near the welding power source.
25. ully insulated electrode holders should be
used. Do NOT use holders with protruding
screws or with any form of damage.
26. ully insulated lock-type connectors should
be used to join welding cable.
27. requently inspect cables for wear, cracks
and damage. IMMEDIATELY REPLACE
those with excessively worn or damaged
insulation to avoid possibly lethal shock
from bared cable. Cables with damaged
areas may be taped to give resistance
equivalent to original cable. Keep cable dry,
free of oil and grease, and protected from
hot metal and sparks.

SAFETY INFO MATION
14
The following types of welding operation
must be performed by a qualified coded
welder and approved by a qualified welding
inspector.
• The welding of pressure vessels for liquid
and gaseous substances.
• The welding of pressurised pipe work for
liquid and gaseous substances.
• The repair of containers for flammable liquids
and corrosive chemicals.
• Structural support and load bearing
steelwork in buildings.
• Load lifting and moving equipment.
• Load lifting slings, chains, hooks and
shackles.
• Hydraulic systems.
• Any type of safety critical equipment.
In addition to the above it is strongly
recommended that the following welding
operations are checked by a competent person.
• The repair of vehicle chassis and suspension
and steering components.
• Vehicle load bearing attachment points ie,
engine mounts seat and seat belt anchor
points.
• Motor Cycle frames and components.
General Safety Rules
Warning! Read all instructions ailure to follow
all instructions listed below may result in electric
shock, fire and/or serious injury. The term
"power tool" in all of the warnings listed below
refers to your mains operated welder.
Save These Instructions
1) Work Area
a) Keep work area clean and well lit.
Cluttered and dark areas invite accidents.
b) 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.
c) Keep children and bystanders away while
operating a power tool. Distractions can
cause you to lose control.
2) Electrical Safety
a) Power tool plugs must match the outlet.
Never modify the plug in any way. Do not
use any adapter plugs with earthed
(grounded) power tools. Unmodified plugs
and matching outlets will reduce risk of
electric shock.
b) Avoid body contact with earthed or
grounded surfaces such as pipes,
radiators, ranges and refrigerators.
There is an increased risk of electric shock if
your body is earthed or grounded.
c) Do not expose power tools to rain or wet
conditions. Water entering a power tool will
increase the risk of electric shock.
d) Do not abuse the cord. Never use the cord
for carrying, pulling or unplugging the
power tool. Keep cord away from heat, oil,
sharp edges or moving parts. Damaged or
entangled cords increase the risk of electric
shock.
e) When operating a power tool outdoors,
use an extension cord suitable for outdoor
use. Use of a cord suitable for outdoor use
reduces the risk of electric shock.
3) Personal Safety
a) Stay alert, watch what you are doing and
use common sense when operating a
power tool. Do not use a power tool while
you are tired or under the influence of
drugs, alcohol or medication.
A moment of inattention while operating
power tools may result in serious personal
injury.
b) Use safety equipment. Always wear eye
protection. Safety equipment such as dust
mask, non-skid safety shoes, hard hat, or
hearing protection used for appropriate
conditions will reduce personal injuries.

15
SAFETY INFO MATION
c) Avoid accidental starting. Ensure the
switch is in the off position before
plugging in. Carrying power tools with your
finger on the switch or plugging in power
tools that have the switch on invites
accidents.
d) Remove any adjusting key or wrench
before turning the power tool on.
A wrench or a key left attached to a rotating
part of the power tool may result in personal
injury.
e) Do not overreach. Keep proper footing
and balance at all times. This enables
better control of the power tool in
unexpected situations.
f) Dress properly. Do not wear loose clothing
or jewellery. Keep your hair, clothing and
gloves away from moving parts. Loose
clothes, jewellery or long hair can be caught
in moving parts.
g) If devices are provided for the connection
of dust extraction and collection facilities,
ensure these are connected and properly
used. Use of these devices can reduce dust
related hazards.
4) Power Tool Use And Care
a) Do not force the power tool. Use the
correct power tool for your application.
The correct power tool will do the job better
and safer at the rate for which it was
designed.
b) Do not use the power tool if the switch
does not turn it on and off. Any power tool
that cannot be controlled with the switch is
dangerous and must be repaired.
c) Disconnect the plug from the power
source before making any adjustments,
changing accessories, or storing power
tools. Such preventive safety measures
reduce the risk of starting the power tool
accidentally.
d) Store idle power tools out of the reach of
children and do not allow persons
unfamiliar with the power tool or these
instructions to operate the power tool.
Power tools are dangerous in the hands of
untrained users.
e) Maintain power tools. Check for
misalignment or binding of moving parts,
breakage of parts and any other condition
that may affect the power tools operation.
If damaged, have the power tool repaired
before use. Many accidents are caused by
poorly maintained power tools.
f) Keep cutting tools sharp and clean.
Properly maintained cutting tools with sharp
cutting edges are less likely to bind and are
easier to control.
g) Use the power tool, accessories and tool
bits etc., in accordance with these
instructions and in the manner intended
for the particular type of power tool,
taking into account the working
conditions and the work to be performed.
Use of the power tool for operations different
from intended could result in a hazardous
situation.
5) Service
a) Have your power tool serviced by a
qualified repair person using only identical
replacement parts. This will ensure that the
safety of the power tool is maintained.

INSTALLATION
Environment
These units are designed for use in
environments with increased hazard of electric
shock.
A. Examples of environments with increased
hazard of electric shock are:
1. In locations in which freedom of movement
is restricted, so that the operator is forced
to perform the work in a cramped (kneeling,
sitting or lying) position with physical
contact with conductive parts.
2. In locations which are fully or partially
limited by conductive elements, and in
which there is a high risk of unavoidable or
accidental contact by the operator.
3. In wet or damp hot locations where humidity
or perspiration considerable reduces the
skin resistance of the human body and the
insulation properties of accessories.
B. Environments with increased hazard of
electric shock do not include places where
electrically conductive parts in the near
vicinity of the operator, which can cause
increased hazard, have been insulated.
Location
This machine can operate in harsh
environments. However, it is important that
simple preventative measures are followed to
assure long life and reliable operation:
• This machine must be located where there
is free circulation of clean air without
restrictions for air movement to and from
the air vents. Do not cover the machine with
paper, cloth or rags when switched on.
• Dirt and dust that can be drawn into the
machine should be kept to a minimum.
• This machine has a protection rating of
IP21S. Keep it dry and do not place it on
wet ground or in puddles. Do not use in wet
or damp locations. Store indoors.
• Locate the machine away from radio
controlled machinery. Normal operation may
adversely affect the operation of nearby
radio controlled machinery, which may
result in injury or equipment damage.
Read the section on electromagnetic
compatibility in this manual.
• Do not operate in areas with an ambient
temperature greater than 40°C.
Tilting
Place the machine directly on a secure, level
surface.
Do not place or operate this machine on a
surface with an incline greater than 15° from
horizontal. The machine may topple over if this
procedure is not followed.
Ventilation
Since the inhalation of welding fumes can be
harmful, ensure that the welding area is
effectively ventilated.
Machine Grounding And High Frequency
Interference Protection
The Capacitor Discharge Circuit used in the high
frequency generator, may cause many radio, TV
and electronic equipment interference problems.
These problems may be the result of radiated
interference.
Proper grounding methods can reduce or
eliminate radiated interference.
1. Direct interference radiated from the welder.
2. Direct interference radiated from the welding
leads.
3. Direct interference radiated from feedback
into the power lines.
4. Interference from re-radiation of “pickup” by
ungrounded metallic objects.
Keeping these contributing factors in mind,
installing equipment as per the following
instructions should minimize problems.
1. Keep the welder power supply lines as short
as possible and enclose as much of them as
possible in rigid metallic conduit or
equivalent shielding for a distance of 50 feet
(15.2m). There should be good electrical
contact between this conduit and the welder
case ground. Both ends of the conduit
should be connected to a driven ground and
the entire length should be continuous.
16

17
INSTALLATION
2. Keep the work and electrode leads as short
as possible and as close together as
possible.
Lengths should not exceed 7.6m. Tape the
electrode and work leads together into one
bundle when practical.
3. Be sure the torch and work cable rubber
coverings are free of cuts and cracks that
allow high frequency leakage. Cables with
high natural rubber content better resist high
frequency leakage than neoprene and other
synthetic rubber insulated cables.
4. Keep the torch in good repair and all
connections tight to reduce high frequency
leakage.
5. The work terminal must be connected to a
ground within ten feet of the welder, using
one of the following methods.
a) A metal underground water pipe in direct
contact with the earth for ten feet or more.
b) A 3/4” (19mm) galvanized pipe or a 5/8”
(16mm) solid galvanized iron, steel or
copper rod driven at least eight feet into the
ground.
The ground should be securely made and the
grounding cable should be as short as possible
using cable of the same size as the work cable,
or larger. Grounding to the building frame
electrical conduit or a long pipe system can
result in re-radiation, effectively making these
members radiating antennas.
6. Keep all panels securely in place.
7. All electrical conductors within 50 ft (15.2m)
of the welder should be enclosed in
grounded, rigid metallic conduit or
equivalent shielding. lexible metallic
conduit is generally not suitable.
8. When the welder is enclosed in a metal
building, several earth driven electrical
grounds connected (as in 5b above) around
the periphery of the building are
recommended.
ailure to observe these recommended
installation procedures can cause radio or TV
interference problems.
Input Connections
Be sure the voltage, phase, and frequency of the
input power is as specified on the rating plate,
located on the machine.
ELECTRIC SHOCK can kill.
SIGNIFICANT DC VOLTAGE is
present after removal of input
power.
DO NOT TOUCH live electrical parts.
Have a qualified electrician provide suitable
input power as per national electrical codes.
Make sure machine is earthed / grounded.
Make sure fuse or circuit breaker is correct
rating for machine. Using fuses or circuit
breakers smaller than recommended will result
in ‘nuisance’ shut off from welder inrush
currents even if welding at low amperages.
ailure to follow these instructions can cause
immediate failure within the welder and void
machines warranty.
Turn the input power O at the mains switch &
fuse box before working on this equipment.
Have a qualified electrician install & service this
equipment.
Allow machine to sit for 5 minutes minimum to
allow the power capacitors to discharge before
working inside this equipment. Do not touch
electrically live parts
The IM-MULT160-K Welder requires a 230V
50Hz supply.
Connect wires according to national coding.
Brown wire – Live
Blue wire – Neutral
Green/Yellow Wire – Earth (Ground)
THIS MACHINE IS OF AN INDUSTRIAL
SPECIFICATION AND MUST BE FITTED TO A
16AMP 230V MAINS INPUT. CONNECTION OF
THE PLUG SHOULD BE CARRIED OUT BY A
QUALIFIED ELECTRICIAN.
WARNING

ELECT ICAL INFO MATION
18
WARNING! THIS APPLIANCE MUST BE
EARTHED
Models Fitted With 13A Plug
Welders fitted with a standard 13 amp BS 1363
plug, should be connected to a to a 230 volt
(50Hz) domestic electrical supply and we
strongly recommend that this be done via a
Residual Current Device (RCD).
IMPORTANT: If the welder is fitted with a plug
which is moulded onto the electric cable (i.e.
non- re-wirable) please note:
1. The plug must be thrown away if it is cut
from the electric cable. There is a danger of
electric shock if it is subsequently inserted
into a socket outlet.
2. Never use the plug without the fuse cover
fitted.
3. Should you wish to replace a detachable fuse
carrier, ensure that the correct replacement is
used (as indicated by marking or colour
code). Replacement fuse covers can be
obtained from your local dealer or most
electrical stockists.
Fuse Rating
The fuse in the plug must be replaced with one
of the same rating (13 amps) and this
replacement must be ASTA approved to
BS1362.
Models Fitted Without Plug
230V Supply
Connect the mains lead to a suitably fused 230
Volt (50Hz) electrical supply. The fuse rating
should correspond to that shown on the
technical specification on page 19.
The wires in the mains lead are coloured in
accordance with the following code:
Green & Yellow: Earth
Blue: Neutral
Brown: Live
As the colours of the flexible cord of this
appliance may not correspond with the coloured
markings identifying terminals in your plug,
proceed as follows:
• Connect GREEN & YELLOW cord to plug
terminal marked with a letter “E” or Earth
symbol “ ”, or coloured GREEN or GREEN
& YELLOW.
• Connect BROWN cord to plug terminal
marked letter “L” or coloured RED.
• Connect BLUE cord to plug terminal marked
letter “N” or coloured BLACK.
Technical specification
Input power: 230V~50Hz
Rated input capacity: 6.1kVA
Output current range: 10-140A (MMA)
Output current range: 10-140A (TIG)
Output current range: 35-160A (MIG)
11-26V (MIG)
Rated duty cycle: 20%
No-load voltage: U0: 62V, Ur: 9.5V
Efficiency: 85%
Case protection class: IP21S
Power factor: 0.70 cosφ
Insulation grade:
Cooling type: an cooling
use: 16A
External dimensions: 553 x 214 x 388mm
Weight: 12kg
Applicable electrode: 1.6~4.0mm
0.6/0.8/0.9/1.0mm

19
COMPONENTS
Component List
1. ‘+’ output terminal
2. MIG torch connector
3. ‘-’ output terminal
4. Voltage control knob
5. Current control knob
6. Current digital display
7. Overheat indicator
8. Overcurrent indicator
9. Voltage digital display
10. VRD (voltage reduction device) indicator
11. MMA/TIG/MIG switch
12. Wire speed control knob
13. Welding power lead
14. Push-pull torch connector
15. Wire spool holder
16. Carry handle
17. Burnback adjustment control dial
18. Manual wire feeding button
19. Standard/Spool gun selector switch
20. Wire feeder
21. Gas hose clamps x 2
22. Gas hose
23. MIG torch
24. Earth clamp
25. TIG torch and accessories
26. Electrode holder
27. ace mask
28. an
29. Power cable
30. On/Off switch
31. Gas inlet
2
17
6
5
9 118 15
1
19
7
10
412
13
14
3
16 18
20
30
28
29
24
23
22
31
21
27
26
25