A-8
INSTALLATION
SQUARE WAVE TIG 275
A-8
TIG TORCH CONNECTION
The Twist-Mate connection allows fast and reliable TIG
torch attachment to the electrode terminal of the
Square Wave TIG 275 welding power supply. Twist-
Mate TIG adapters are made of brass, combining high
electrical conductivity with mechanical strength. They
are available in several sizes and styles to accommo-
date a wide selection of gas and water-cooled TIG
torches.
• Air-Cooled TIG Torch connections refer to TWIST-
MATE ADAPTER for LA-9 and LA-17 TIG TORCH
Section.
• Water-Cooled TIG Torch connections refer to TWIST-
MATE ADAPTER for LW-18 and LW-20 TIG TORCH
Section.
Any torch having hoses and cables equipped with
Compressed Gas Association (CGA) style fittings can
be connected to an appropriate Twist-Mate adapter
(see ACCESSORIES section).
The power source must
be switched off while making any of these connections.
Do not operate a water-cooled torch without an ade-
quate coolant supply. Set-ups using recirculated
coolant require that the cooler be switched on and run-
ning. If the water solenoid valve option is used with a
cooler, the coolant does not flow until the solenoid is
actuated.
For set-ups using water as a single-pass through
coolant, install a strainer into the system upstream of
the Square Wave TIG 275 to reduce the concentration
of particles that could contaminate the system.
Otherwise, flow passages could become obstructed or
clogged, causing torch overheating or failure. The
optional water solenoid valve may also malfunction.
When the water solenoid valve option is installed into
the Square Wave TIG 275, connect the coolant supply
line from either cooler outlet or single-pass supply to
the “Water Inlet” fitting located on the machine’s case
front. Connect the TIG torch’s smaller water fitting to
the “Water Out” fitting also located on the case front. A
non-metallic coolant line is required between the elec-
trode connection and the drain or cooler inlet. This
reduces the possibility of an electrical hazard.
TIG welding torches are available with 12.5 and 25 foot
(3.8 and 7.6 m, respectively) long cables. Use the
shorter length whenever possible to reduce radio inter-
ference problems.
The high-pressure cylinder of inert shielding gas must
be equipped with a flow regulator that limits the gas
pressure to 150 psi maximum at the machine’s gas
inlet. This brass inlet fitting is located on the rear panel
of the Square Wave TIG 275. Install a hose between
the gas flow meter and the inlet fitting.
For other conditions, consult the manufacturer’s
instructions for the water cooler or TIG torch being
used.
CYLINDER could explode
if damaged.
•Keep cylinder upright and chained
to a support.
•Keep cylinder away from areas where it could be
damaged.
•Never allow the torch to touch the cylinder.
•Keep cylinder away from live electrical circuits.
•Maximum inlet pressure 150 psi.
___________________________________________
WARNING
