Tweco 180 Portable MIG - Manual (Page 26)

FABRICATOR 140, 180 INSTALLATION
Manual 0-4991 3-2 July 20, 2007
3.05 Requirements for Maximum Output
In order to obtain the maximum output capability of the
Fabricator 140, a branch circuit capable of 20 amperes at
115 to 125 Volts 60 Hz is required. In order to obtain the
maximum output capability of the Fabricator 180, a branch
circuit capable of 30 amperes at 230 to 250 Volts 60 Hz is
required. This generally applies when welding steel that
is equal to or greater than 12 gauge (0.105” 2.5mm) in
thickness.
The rated output with this installation is 90 amperes, 18
Volt, 20% duty cycle (2 minutes out of every 10 minutes
used for welding) for the Fabricator 140, and 130 amperes,
20 Volt, 25% duty cycle (2.5 minutes out of every 10
minutes used for welding) for the Fabricator 180.
3.06 Installation of Shielding Gas
(GMAW) Process
Refer to Figure 3-1.
NOTE
Shielding Gas is not required if the unit is using
self-shielded FCAW (flux cored arc welding)
wires.
1. Cylinder Positioning: Chain the cylinder to a wall or
other support to prevent the cylinder from falling over.
If an optional portable mounting arrangement is used,
follow the instructions that are provided with it.
2. Remove Cylinder Cap: Remove the large metal cap
on top of the cylinder by rotating counter clockwise.
Next remove the dust seal.
3. Cracking: Position yourself so the valve is pointed
away from you and quickly open and close the valve
for a burst of gas. This is called “Cracking” and is
done to blow out any foreign matter that may be
lodged in the fitting.
CAUTION
KEEP FACE WELL AWAY FROM THE
CYLINDER VALVE DURING “CRACKING”.
Never “crack” a fuel gas cylinder valve near
other welding works, sparks or open flames.
Ensure that the surrounding area is well
ventilated.
4. Fit Regulator/Flowmeter to Cylinders:
Screw the regulator into the appropriate cylinder. The
nuts on the regulator and hose connections are right
hand (RH) threaded and need to be turned in a
clockwise direction in order to tighten. Tighten with a
wrench.
CAUTION
Match regulator to cylinder. NEVER CONNECT
a regulator designed for a particular gas or
gases to a cylinder containing any other gas.
5. Attach Supplied Gas Line: Attach supplied gas line
between the regulator output and the desired input
at the rear of the power supply depending on Spool
Gun or MIG Gun use.