Lincoln Electric IM10047 RED-D-ARC GX300 - Manual (Page 16)

A-8 INSTALLATION A-8
CONNECTION OF LINCOLN ELECTRIC
WIRE FEEDERS
Connection of the LN-25 to the GX 300
Shut off welder before making any electrical con-
nections.
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The LN-25 with or without an external contactor may
be used with the GX 300. See the appropriate con-
nection diagram in Section F.
NOTE: The LN-25 (K431) Remote Control Module
and (K432) Remote Cable are not recommended for
use with the GX 300.
1. Shut the welder off.
2. For electrode Positive, connect the electrode
cable from the LN-25 to the "+" terminal of the
welder and work cable to the "-" terminal of the
welder. For electrode Negative, connect the elec-
trode cable from the LN-25 to the "-" terminal of
the welder and work cable to the "+" terminal of
the welder.
3. Attach the single lead from the front of the LN-25
to work using the spring clip at the end of the lead.
This is a control lead to supply current to the wire
feeder motor; it does not carry welding current.
4. Set the MODE switch to the "CV-WIRE " position.
5. Set the "WELD TERMINALS" switch to "WELD
TERMINALS ON"
6. Set the "ARC CONTROL" knob to "0" initially and
adjust to suit.
7. Set the "IDLE" switch to the "AUTO" position.
When not welding, the GX 300 engine will be at
the low idle speed. If you are using an LN-25 with
an internal contactor, the electrode is not ener-
gized until the gun trigger is closed.
8. When the gun trigger is closed, the current sens-
ing circuit will cause the GX 300 engine to go to
the high idle speed, the wire will begin to feed and
the welding process started. When welding is
stopped, the engine will revert to low idle speed
after approximately 12 seconds unless welding is
resumed.
If you are using an LN-25 without an internal con-
tactor, the electrode will be energized when the
GX 300 is started.
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Connection of LN-7 or LN-8 to the GX 300
1. Shut the welder off.
2. Connect the LN-7 or LN-8 per instructions on the
appropriate connection diagram in Section F
3. Set the "WIRE FEEDER VOLTMETER" switch to
either "+" or "-" as required by the electrode being
used.
4. Set the "MODE" switch to the "CV WIRE " posi-
tion.
5. Set the "ARC CONTROL" knob to "0" initially and
adjust to suit.
6. Set the "WELD TERMINALS" switch to the
"REMOTELY CONTROLLED" position.
7. Set the "IDLE" switch to the "HIGH" position.
Connection of LN-742, Spool Gun, and Cobramatic
to GX 300
1. Shut the welder off.
2. Connect per instructions on the appropriate con-
nection diagram in Section F.
GX 300
WARNING
CAUTION