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A-8
INSTALLATION
RANGER 250
A-8
CONNECTION OF LINCOLN ELEC-
TRIC WIRE FEEDERS
Connection of LN-7 or LN-8 to the Ranger 250
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 an LN-23P Wire Feeder to the
Ranger 250
1. Shut the welder off.
2. Connect the LN-23P as per instructions on the
appropriate connection diagram in Section F.
(NOTE): When connecting an LN-23P to the
Ranger 250, a K350-1 adapter kit must be used.
3. Set the "VOLTMETER" switch to "-".
4. Set the "MODE" switch to "CV WIRE" position.
5. Set the "WELD TERMINALS" switch to
"REMOTELY CONTROLLED".
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 Ranger 250 engine will be
at the low idle speed. If you are using an LN-23P
with the K350-1 adapter kit, the electrode is not
energized until the gun trigger is closed. When
the gun trigger is closed, the current sensing cir-
cuit will cause the Ranger 250 engine to go to the
high idle speed, the wire will begin to feed and the
welding process can be started. When welding is
stopped, the engine will revert to low idle speed
after approximately 12 seconds unless welding is
resumed.
Connection of the LN-25 to the Ranger 250
The LN-25 with or without an external contactor may
be used with the Ranger 250. See the appropriate
connection diagram in Section F.
Note: The LN-25 (K431) Remote Control Module and
(K432) Remote Cable are not recommended for use
with the Ranger 250.
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 Ranger 250 engine will be
at the low idle speed. If you are using an LN-25
with an internal contactor, the electrode is not
energized until the gun trigger is closed.
8. When the gun trigger is closed, the current sens-
ing circuit will cause the Ranger 250 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.
Connection of LN-742, Spool Gun, and Cobramatic
to Ranger 250
1. Shut the welder off.
2. Connect per instructions on the appropriate con-
nection diagram in Section F.