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CONNECT YOUR UNIT TO THE CORRECT SHIELDING GAS
What Shielding Gas Should Be Used?
The following gases should be used and are the best choices in the
gas selection during initial setup after powering the unit up:
MIG Steel Short Circuit: 75%/25% Ar/CO
CO
(C100)
2
MIG Steel Axial Spray: 90%/10% Ar/CO
less than 20% CO
with balance being Argon.
2
MIG Stainless (Inox): Short Circuit OR Spray 98%/2% Ar/CO
(98/2 )
MIG Stainless Short Circuit Only: He/Ar/CO
MIG: Aluminum or Brazing: 100% Ar ( Argon)
All TIG: 100% Ar (Argon)
Notice that Steel has a couple of gas choices. In the North American
Market, 75/25 is the standard gas choice for short circuit MIG and
Gas Shieled Flux-cored welding. It provides less spatter than CO
and a cleaner, less oxidized weld in general. 100% CO
but can require more cleanup and descaling after the weld is com-
pleted. In other markets, 100% CO
may offer slightly different combinations. If 75/25 gas mix is not
available for use and 80/20 is an option, then this gas may be used
on the 75/25 setting. Any gas less than or equal to 20% CO
generally considered suitable for Axial Spray welding.
Stainless gas mixes can range throughout the industry. However, in
the industry. this unit is designed to be used with 98/2 Ar/CO2 blend
when welding Stainless Steel. While there are other gas choices,
such as "TriMix" with He, Ar and CO
ly available and economic one for welding Stainless Steel (Inox).
MIG Aluminum and MIG Brazing will always require the use of pure
Argon (100% Ar) shielding gas while welding in MIG mode. This is
a widely available and a standard gas throughout the world.
TIG uses Argon for all metals. Never accept any other gas for DC
TIG welding.
WARNING!
Always wear safety glasses and gloves when changing a gas cylin-
der. Always use safety chains to secure the cylinder to the welder.
Carefully lift and install the gas cylinder onto the welder back deck
plate while safety cap is still on. Use the supplied safety chain to
secure the cylinder to the cart as tightly as possible. Once the cylinder
is installed, it may be uncapped when ready for use. Before connect-
ing any cylinder, stand to the side of the cylinder valve, making sure
you are away from the discharge side opening. Then, quickly open
and shut the cylinder valve giving it a quick blast. This will dislodge
any dirt or particles stuck in the valve or the connection seat. This will
help reduce the chance of dirt particles making its way into the sole-
noid valve, causing sticking issues later on in service.
Connecting your cylinder will require a cylinder wrench (1 1/16")to
connect the regulator to the cylinder (North American Cylinders with a
Setup Guide
Getting Started
(75/25 or C25) OR 100%
2
(90/10 or C10) or similar
2
2
(Stainless TriMix)
2 (
is cheaper,
2
is more commonly available, or
2
is
2
, this is typically the most wide-
2
580 CGA valve). If you do not have a cylinder wrench, an adjustable
type wrench will work, but make sure it is properly adjusted to pre-
vent rounding of the fitting shoulders. Do not use pliers, or a serrated
-jawed wrench such as a pipe wrench to tighten the fitting. The de-
sign of the fitting means that no thread sealing tape or compound
needs to be used.
Connect the supplied tubing to the regulator. Tighten with two
3/4" (19mm) wrenches to hold both the regulator and the tubing
connection at the same time. Hold counter pressure on the regulator
connector while tightening the hose fitting to prevent damage to the
regulator. After connecting the tubing to the regulator, connect the
other end of the tubing to the 5/8" CGA fitting on the welder. Hold
the fitting on the unit with one 3/4" (19mm) wrench firmly while
tightening the hose fitting with another 3/4"(19mm) wrench. NOTE:
Some regulators use an 11/16" (17mm) fitting.
Important: Do not use thread tape or pipe sealant on any cylinder,
regulator or unit connection. The residue and debris may get into the
2
gas solenoid and cause operational issues.
Do not tighten the rear unit connection without holding the female
5/8 CGA fitting located on the back of the welder with a wrench, or
damage may occur to the solenoid, housing or fitting as the fitting
may turn in the housing while the hose fitting is being tightened.
Connect Regulator To Cylinder And Unit.
16
CAUTION!
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