Location; Machine Grounding And High Frequency Interference Protection; Stacking; Lifting And Moving - Lincoln Electric SQUARE WAVE TIG 175 Service Manual

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Read entire installation section before starting
installation.
Safety Precautions
WARNING
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 receptacle grounded per the National
Electrical Code and any local codes.
SELECT SUITABLE LOCATION
Place the welder where clean cooling air can freely
circulate in through the rear louvers and out through
the front and side louvers. Dirt, dust or any foreign
material that can be drawn into the welder should be
kept at a minimum. Failure to observe these precau-
tions can result in excessive operating temperatures
and nuisance shut-downs.

STACKING

Square Wave TIG 175's cannot be stacked.

LIFTING AND MOVING

The Square Wave TIG 175 should be lifted by two or
more people or with a hoist. 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
surface, either directly or on a recommended
undercarriage. 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
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 workpiece.
INSTALLATION
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 electron-
ic 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
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.
2. Keep the work and electrode leads as short as
possible 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:
SQUARE WAVE TIG 175
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