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A-7
INSTALLATION
LN-742 & LN-742H
A-7
GMAW SHIELDING GAS HOOKUP
Gas under pressure is explosive.
Always keep gas cylinders in an
upright position and chained to the
undercarriage or a stationary
support. See American National
Standard Z-49.1, “Safety In Welding
And Cutting”, published by the
American Welding Society.
------------------------------------------------------------------------
Customer must provide a cylinder of shielding gas, a
pressure regulator, a flow control valve, and a hose
from the flow valve to the gas inlet fitting of the LN-742.
Install per Figure A.6 and the following:
1. Connect the supply hose from the gas cylinder
flow valve outlet to the 5/8-18 female inert gas
fitting on the back panel of the LN-742.
2. Install the barbed fitting and union nut to the
5/8-18 female inert gas fitting on the front of the
LN-742. Connect 3/16 in. (4.8 mm) I.D. gas hose
from the gun to the barbed fitting.
When the gun is to be removed, this fitting can be
easily detached by loosening the union nut.
The LN-742 can be used with any shielding gas
recommended in the electrode’s product literature at a
maximum pressure of 60 psi (4.1 bar). This may
include gasses such as Argon, Helium and Nitrogen
and blended gases such as Ar-He, Ar-N
2
, Ar-O
2,
Ar-
CO
2
, CO
2
, AR-CO
2
,-O
2
.
WARNING
FIGURE A.6 – SHIELDING GAS HOOKUP.
t
t
GAS
SUPPLY
HOSE
GAS
HOSE
INERT
GAS
FITTING