Lincoln Electric IM677 RED-D-ARC LN-25 - Manual (Page 11)

LN-25
A-4 A-4
INSTALLATION
Install the barbed fitting and union nut to the 5 ⁄
8
-18
female inert gas fitting on the front panel of the LN-
25 case. Connect the
3 ⁄
16
” I.D. gas hose from the gun
cable to the barbed fitting.
When the gun is to be removed, this fitting can be
easily detached by loosening the union nut.
WELD CABLE CONNECTION
The size of the electrode cable and work cable must
be sufficient for the maximum weld current and total
cable length to be used. Refer to table A.1.
TABLE A.1
Total Cable Length
Weld Current
60% Duty Cycle 50’-100’ 100’-150’ 150’-200’ 200’-250’
200Amps 2 AWG 2 AWG 1 AWG 1/0
300Amps 1 AWG 1 AWG 1/0 2/0
400Amps 2/0 2/0 3/0 3/0
500Amps 2/0 3/0 3/0 4/0
ELECTRODE CABLE CONNECTION
Route the electrode cable through the oval hole in the
lower portion of the LN-25 rear panel. Connect the
electrode cable to the LN-25 input stud using the
1 ⁄
2
”
nut provided.
Secure the cable with the strain relief clamp provided.
All units are supplied with an optional pigtail for
customers that prefer to make a taped and bolted
connection externally.
WORK CABLE CONNECTION
Connect a work lead of sufficient size between the
proper output stud on the power source and the
work. Be sure the connection to the work makes
t i g h t m e t a l - t o - m e t a l e l e c t r i c a l c o n t a c t . Poor
work lead connections can result in poor welding
performance.
WIRE FEED DRIVE ROLL AND
GUIDE TUBE KITS
Turn off welding power source before installing
or changing drive roll and/or guide tubes.
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NOTE: The maximum wire sizes the LN-25 will
satisfactorily feed are
5 ⁄
64
” cored and 1 ⁄
16
” solid
electrodes.
The electrode sizes that can be fed with each roll and
guide tube are stencilled
(1) on each part. Check the kit
for proper components. See the instructions, included
with the drive roll kit, to install these parts on new
machines or replace them on used machines. Refer
to table A.2.
TABLE A.2
Kit Instructions
Steel Wire Sizes:
.068-
5 ⁄
64
Cored KP653- 3 ⁄
32
L9932
1 ⁄
16
(.062) Cored or Solid - 1 ⁄
16
Steel
(Can also be used for .052)
.045 and .052 Solid Steel
-.052
.045 and .052 Cored -.052C
.035 Solid Steel -.035S
.035 Cored -.035C
.030 Solid Steel -.030S
.025 Solid Steel -.025S
Aluminum Wire Sizes:
1 ⁄
16
KP654- 1 ⁄
16
A L9932
3 ⁄
64
- 3 ⁄
64
A
.035 -.035A
(1) Drive rolls for only cored electrode sizes are stencilled with a
“C” suffix to the wire sizes.
Drive rolls for only solid electrode sizes are stencilled with an
“S” suffix to the wire sizes.
Drive rolls for aluminum wire sizes are stencilled with an “A” suffix
to the wire sizes.
WARNING