Read this entire installation section before you
start installation.
SAFETY PRECAUTIONS
ELECTRIC SHOCK can kill.
• Do not touch electrically live parts
or electrodes with your skin or wet
clothing.
• Insulate yourself from the work
and ground.
• Always wear dry insulating gloves.
Only qualified personnel should install, use, or service
this equipment.
SELECT SUITABLE LOCATION
Place the Square Wave TIG 355 where clean, cooling
air can flow freely in through the side louvers and out
through the rear louvers. Keep dust, dirt, and other
foreign materials that can be drawn into the machine
to a minimum. Failure to observe these precautions
can lead to excessive operating temperatures and
nuisance shut-downs. Read the section, "High
Frequency Interference Protection" before planning
the installation.
STACKING
Square Wave TIG 355s may be stacked two high.
The bottom machine must be on a stable, hard, level
surface. Be sure that the two pins in the roof of the
bottom machine fit into the holes in the base of the
top machine.
LIFTING
CYLINDER MAY EXPLODE if damaged.
• Do not lift the welder with a cylinder attached.
The Square Wave TIG 355 weighs 510 lbs. (232 kg)
without a gas cylinder. Lift the machine by the lift
bail only. Never lift the machine with a cylinder
attached.
TILTING
Place the machine on a secure, level surface or on a
recommended undercarriage. Any surfaces you
place it on other than the ground must be firm, non-
skid, and structurally sound.
HIGH FREQUENCY INTERFERENCE
PROTECTION
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 355 has been field tested under
recommended installation conditions. It complies with
FCC allowable limits for radiation. For convenience, a
certificate of compliance is packed with the welder. It
can be used to prove FCC RF Energy Radiation Limits
compliance if necessary. (It is the owner's responsi-
bility to obtain this certification.) The Square Wave TIG
355 also complies with NEMA standards for high fre-
quency 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.
1. Keep the welder power supply lines as short as
possible and completely enclose them in rigid
metallic conduit or equivalent shielding for a mini-
mum distance of 50 feet (15.2m). There should be
good electrical contact between this conduit and
the welder. 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.
INSTALLATION
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A-3
SQUARE WAVE TIG 355
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WARNING
WARNING
