Lincoln Electric RANGER 250 SVM150-A Service Manual page 30

C-6
CONNECTION OF THE LN-25 TO THE
RANGER 250 "ACROSS THE ARC"
WITH K857 REMOTE CONTROL
(SEE FIGURE C.4.)
1. Shut the welder off.
2. Connect the electrode cable from the LN-25 to the
"-" terminal of the welder. Connect the work cable
to the "+" terminal of the welder.
NOTE: Welding cable must be sized for current and
duty cycle of application.
NOTE: Figure C.4 shows the electrode connected for
negative polarity. To change polarity, shut the welder
off and reverse the electrode and work cables at the
Ranger 250 output terminals.
3. Connect the K857 Remote Control to the 6-pin
amphenol on the Ranger 250.
4. Attach the single lead from the LN-25 to the work
using the spring clip on the end of the lead. This is
only a sense lead – it carries no welding current.
5. Place the "IDLER" switch in the "AUTO" or "HIGH"
position, as desired.
14 PIN
-
AMPHENOL
(RANGER 300 DLX
ONLY)
+
TO WORK
ACCESSORIES
FIGURE C.4 – RANGER 250/LN-25 ACROSS THE ARC
CONNECTION DIAGRAM WITH K857 REMOTE CONTROL
6 PIN
-
AMPHENOL
–
ELECTRODE
TO WORK
RANGER 250
CAUTION
If you are using an LN-25 without an internal contactor,
the electrode will be "HOT" when the Ranger 250 is
started.
6. Set the "MODE" switch to "CV-WIRE."
7. Set the "WELD TERMINALS" switch to "WELD
TERMINALS ON."
8. Set the "VOLTMETER" switch to "+" or "-"
depending on the polarity chosen.
9. Adjust wire feed speed at the LN-25 and adjust
the welding voltage with the K857 if optional
remote control is used.
10. Adjust the "ARC" control to "0" initially and adjust
to suit.
LN-25
WIRE FEEDER
ELECTRODE CABLE
C-6
OPTIONAL K857
REMOTE CONTROL
WORK CLIP LEAD
TO WORK