Safety Precautions; Select Suitable Location; Stacking; Lifting And Moving - Lincoln Electric SQUARE WAVE SVM141-A Service Manual

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Read this entire installation section before you
start installation.

SAFETY PRECAUTIONS

WARNING
ELECTRIC SHOCK can kill.
• Only qualified personnel should per-
form this installation.
• Turn the input power OFF at the dis-
connect switch or fuse box before
working on this equipment.
• Do not touch electrically hot parts.
• Always connect the Square Wave TIG 275 grounding
screw (located on the right rear corner of the base) to
a good electrical earth ground.
• Always connect the Square Wave TIG 275 to a power
supply grounded per the National Electrical Code and
any local codes.

SELECT SUITABLE LOCATION

Place the welder where clean cooling air can freely cir-
culate in through the rear louvers and out through the
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 precautions can result in
excessive operating temperatures and nuisance trips.

STACKING

Square Wave TIG 275's cannot be stacked.

LIFTING AND MOVING

The Square Wave TIG 275 should be lifted with a hoist.
(It weighs approximately 330 lbs./150 kg.) An optional
undercarriage is available to easily move the unit.
Refer to the Accessories section of this manual. The
Square Wave TIG 275 is designed to be used with a
K932-1 Undercarriage. Complete installation instruc-
tions are included with the K932-1 Undercarriage.
When the undercarriage is properly installed, the
Square Wave TIG 275 lift bale is nonfunctional. Do not
attempt to lift the power source with the undercar-
riage attached. The undercarriage is designed for
hand moving only; mechanized towing can lead to per-
sonal injury and/or damage to the Square Wave TIG
275.
INSTALLATION

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 275 power source carries an
IP21S environmental rating. It may be used in normal
industrial and commercial environments. It is rated for
use in damp, dirty rain-sheltered environments.
MACHINE GROUNDING AND HIGH FRE-
QUENCY INTERFERENCE PROTECTION
The frame of the welder must be grounded.
ground screw marked with the symbol
at the right rear corner of the base for this purpose.
See your local and national electrical codes for proper
grounding methods.
The spark gap oscillator in the high frequency genera-
tor, being similar to a radio transmitter, can be blamed
for many radio, TV and electronic equipment interfer-
ence problems. These problems may be the result of
radiated interference. Proper grounding methods can
reduce or eliminate radiated interference.
The Square Wave TIG 275 has been field tested under
recommended installation conditions and has been
found to comply with F.C.C. allowable radiation limits.
A certificate (S14929) is being sent with each welder
for customer convenience. If he desires or is required
to obtain certification of compliance with F.C.C. RF
Energy Radiation Limits, this certificate can be used. It
is the customer's responsibility to obtain this certifica-
tion. This welder has also been found to comply with
NEMA standards for high frequency stabilized power
sources.
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.
SQUARE WAVE TIG 275
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is located