Lincoln Electric IM10059 SQUARE WAVE TIG 175 - Manual (Page 9)

A-2 INSTALLATION
SQUARE WAVE™ TIG 175
A-2
ELECTRIC SHOCK can kill.
• Only qualified personnel should
perform this installation.
• Turn the input power OFF at the
disconnect switch or fuse box
before working on this
equipment.
• Do not touch electrically hot
parts.
• Always connect the SQUARE WAVE™ TIG 175 to a
power supply grounded per the National Electrical
Code and any local codes.
WARNING
SAFETY PRECAUTIONS
SELECT SUITABLE LOCATION
Place the welder where clean cooling air can freely cir-
culate in through the rear louvers or brickwork and out
through the front and side louvers. Dirt, dust or any for-
eign material that can be drawn into the welder should
be kept at a minimum. Failure to observe these pre-
cautions can result in excessive operating tempera-
tures and nuisance shut-downs.
GRINDING
Do not direct grinding particles towards the welder. An
abundance of conductive material can cause mainte-
nance problems.
STACKING
SQUARE WAVE™ TIG 175ʼs cannot be stacked.
LIFTING AND MOVING
The SQUARE WAVE™ TIG 175 should be lifted by two
or more people or with a hoist. (It weighs approximate-
ly 200 lbs./90.9 kg.) Its lifting handles are designed to
make lifting more convenient. An optional undercarriage
is available to easily move the unit. Refer to the
Accessories section of this manual.
TILTING
Each machine must be placed on a secure, level sur-
face, either directly or on a recommended undercar-
riage. The machine may topple over if this procedure
is not followed.
ENVIRONMENTAL RATING
The SQUARE WAVE™ TIG 175 power source carries an
IP21 environmental rating. It may be used in normal indoor
industrial and commercial environments. Avoid using it in
environments which have falling water such as rain. Read
and follow “Electric Shock Warnings” in the Safety section if
welding must be performed under electrically hazardous
conditions such as welding in wet areas or on or in the work-
piece.
MACHINE GROUNDING AND HIGH FRE-
QUENCY INTERFERENCE PROTECTION
The welder must be grounded. See your local and national
electrical codes for proper grounding methods.
The high frequency generator, being similar to a radio
transmitter, can be blamed for 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.
Radiated interference can develop in the following four
ways:
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 per the following instructions should mini-
mize problems.
1. Keep the welder power supply lines as short as pos-
sible 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.
2. Keep the work and electrode leads as short as pos-
sible and as close together as possible. Lengths
should not exceed 25 ft (7.6m). Tape the leads
together when practical.
3. Be sure the torch and work cable rubber coverings
are free of cuts and cracks that allow high frequen-
cy leakage.
4. Keep the torch in good repair and all connections
tight to reduce high frequency leakage.
5. The work piece must be connected to an earth
ground close to the work clamp, using one of the
following methods:
Read entire installation section before starting
installation.