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INPUT CONNECTIONS
(FIGURE A.4)
Refer to Figure A.4.
The machine has two input connections, the power
input cable and the gas inlet fitting. The power input
cable and gas inlet fitting are located on the rear.
GAS CONNECTION
When using the MIG process, a cylinder of shielding
gas (appropriate for the metal being welded) must be
obtained.
CYLINDER may explode if damaged.
Keep cylinder upright and chained to
support.
• Keep cylinder away from areas where it
may be damaged.
• Never lift welder with cylinder attached.
• Never allow welding electrode to touch cylinder.
• Keep cylinder away from welding or other live
electrical circuits.
BUILDUP OF SHIELDING GAS may harm
health or kill.
• Shut off shielding gas supply when not
in use.
• SEE AMERICAN NATIONAL STANDARD Z-49.1,
“SAFETY IN WELDING AND CUTTING” PUB-
LISHED BY THE AMERICAN WELDING SOCIETY.
------------------------------------------------------------------------
GAS INLET FITTING
POWER INPUT CABLE
A-3
INSTALLATION
MIG PAK HD
A-3
SELECT SUITABLE LOCATION
Place the machine on a secure, level surface or rec-
ommended undercarriage. The machine may topple
over if this procedure is not followed. To minimize over
heating, locate the welder in a dry location where there
is free circulation of clean air. Do not place on com-
bustible surfaces.
STACKING
Machines cannot be stacked.
CHANGING POLARITY
1. For Negative Polarity Welding (DC-): Refer to
Figure A.2. As delivered, the machine is wired for
Negative polarity with the gun cable connected to
the Negative (-) output terminal and the work cable
to the Positive (+) output terminal. Make sure that
both thumbscrews are tight. This is the typical con-
figuration for Flux Cored Welding (FCAW).
2.For Positive Polarity Welding (DC+): Refer to
Figure A.3. To wire for Positive polarity, connect
the gun cable to the Positive (+) output terminal and
the work cable to the Negative (-) terminal. This is
the typical configuration for the Metal Inert Gas
(MIG) process. Make sure that both thumbscrews
are tight.
WARNING
WORK CABLE
WORK CABLE
WORK CABLE
WORK CABLE
GUN CABLE
GUN CABLE
GUN CABLE
GUN CABLE
(FIGURE A.3)
WORK CABLE
WORK CABLE
WORK CABLE
WORK CABLE
GUN CABLE
GUN CABLE
GUN CABLE
GUN CABLE
FIGURE A.2