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ACCESSORIES
C-3C-3
LN-25™
OPTIONAL ACCESSORIES
ELECTRIC SHOCK can kill.
• Do not operate with covers
removed.
• Turn off power source before
installing or servicing.
• Do not touch electrically hot
parts.
• Turn the input power to the
welding power source off at
the fuse box before working in
the terminal strip.
• Only qualified personnel
should install, use or service
this equipment.
GAS SOLENOID KIT (K430-2 FOR CODES
ABOVE 10500 OR K430-1 FOR CODES BELOW 10500)
(Factory Installed on K446 and K449 Models)
The kit permits the LN-25™ to be used for Gas
Metal Arc Welding (GMAW) processes with a GMA
gun cable.
The kit can be used with or without a Remote Output
Control option installed in the LN-25™ and provides
flow of shielding gas:
1. With wire feed, when the gun trigger is closed.
2. Without wire feed, when the kit’s Purge button
(located beneath the gas inlet fitting) is pressed.
NOTE: Always shut off the valve at the gas cylinder
before making any gas connections to the LN-25™.
User must provide a supply of shielding gas, a pres -
sure regulator, a flow control valve and a hose from
the flow valve to the gas inlet fitting of the LN-25™.
Install by connecting a supply hose from the gas flow
valve outlet to the
5
⁄8-18 female inert gas fitting on the
back panel of the LN-25™ case. The LN-25™ 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 gases such as
Argon, Helium, Nitrogen and blended gases such as
Ar-He, Ar-N
2
, Ar-O
2
, Ar-CO
2
, CO
2
, Ar-CO
2
-O
2
.
See American National Standard Z-49.1, “Safety in
Welding and Cutting” published by the American
Welding Society.
CYLINDER may explode if
damaged.
• Keep cylinder upright and
chained to support.
• Keep cylinder away from
areas where it may be dam-
aged.
• Never lift welder with cylinder
attached.
• Never allow welding electrode
to touch cylinder.
• Keep cylinder away from weld-
ing or other live electrical cir-
cuits.
See GMA Gun Cable Gas Connection.
Installation instructions are included with the kit.
K434-1 GAS FLOW TIMER KIT
(Requires either a K431-1 Remote Output Control Kit,
K624-1 42V Remote Output Control Kit, or internal
contactor K443-1 or K443-2 installed in LN-25™).
The K434-1 Gas Flow Timer Kit is used with the
LN-25™ Gas Solenoid when the LN-25™ is
equipped with any of the Remote Output Control
Options or internal contactor.
T hi s k it pr o vi d e s t he fo l lo w in g g a s f l ow
timer functions:
1. Preflow Control - Provides flow of shielding
gas to the work before the arc is established.
The solenoid valve is energized immediately
when the gun trigger is closed, but the time
delay before the wire feeder and welding output
are energized is adjustable between at least
0 to 1 second.
2. Postflow Control - Provides flow of shielding gas
to the work after welding is stopped. Delay of the
shut off of the solenoid valve after the gun trigger
is released is adjustable between at least 0.5 to
5 seconds.
Installation instructions are included with this kit.
WARNING
WARNING
WARNING
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