Lincoln Electric LN-7 GMA WIRE FEEDERS - Manual (Page 29)

A-22 INSTALLATION
LN-7 & LN-7 GMA
A-22
SHIELDING GAS HOOKUP (LN-7 GMA
or LN-7 with Optional K494 Gas Solenoid
Installed)
Gas under pressure is explosive. Always keep gas
cylinders in an upright position and 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.
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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-7
GMA or the K494 Gas Solenoid Valve Kit installed on
the LN-7. Install per Figure A.20 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-7.
2. Install the barbed fitting and union nut to the
5/8-18 female inert gas fitting on the front of the
LN-7. 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.
FIGURE A.20 – SHIELDING GAS HOOKUP.
INERT
GAS
FITTING
GAS
HOSE
GAS
SUPPLY
HOSE
WARNING