Installation, Caution, A-2 output connections – Lincoln Electric IDEALARC R3R-300 User Manual
Page 9
A-2
INSTALLATION
A-2
OUTPUT CONNECTIONS
OUTPUT STUDS
With the machine off, run electrode and work cables of
the appropriate sizes (see the following table) up
through the rectangular holes in the machine base
located below the output studs. Connect the cable lugs
to the output terminals marked (+) and (-) or, if the
welder comes equipped with the polarity switch option
“electrode” and “to work”. Tighten the holding nuts with
a wrench.
Cable Sizes for Combined Length of Electrode
and Work Cable (Copper) at 60% Duty Cycle
CONNECTION OF OPTIONAL REMOTE CONTROL
– K857
Turn the machine off. The K857 consists of a control
box with 28 feet (8.5m) of four conductor cable and a 6
pin connector for easy connection to the power source.
This control will give the same control as the current
control on the machine depending on the position of
the current dial selector switch. (There is no current
dial selector switch on the R3R-300.)
Extreme care must be observed when installing or
extending the wiring of a remote control. The
remote control cord can be lengthened to any
length by splicing four wires to the standard 28 ft.
(8.5m) cord before connecting to the R3R terminal
strip. Only the green lead can and should be
grounded to the machine case.
When extending the standard remote control make
sure the leads are the same and the splice is water-
proof. Don’t let the lugs touch against the case.
OPTIONAL K963 HAND AMPTROL AND K870
FOOT AMPTROL
These amptrols connect directly to the 6-pin connector
on the front of the power source.
TIG WELDING
The R3R is shipped with proper R.F. By-pass circuitry
installed to protect the control circuit when TIG welding
with a Hi-Freq™ unit. To provide protection, the
welder frame grounding stud must be connected to
ground.
IDEALARC® R3R, -300, -400, -500
CAUTION
Machine Up to 100 ft. 100 to 150 ft. 150 to 200 ft. 200 to 250 ft.
Size
(30 m)
(30 – 46 m)
(46 – 61 m)
(61 – 76 m)
300
1/0 (54 mm
2
) 1/0 (54 mm
2
)
2/0 (68 mm
2
)
3/0 (86 mm
2
)
400
2/0 (68 mm
2
) 2/0 (68 mm
2
)
3/0 (86 mm
2
) 4/0 (108 mm
2
)
500
2/0 (68 mm
2
) 3/0 (86 mm
2
)
3/0 (86 mm
2
) 4/0 (108 mm
2
)