Lincoln Electric IM311 LN-23P - Manual (Page 11)

B-1 OPERATION B-1
PRODUCT DESCRIPTION
The K316L-[ ] / LN™-23P is a lightweight, portable wire feed
unit which includes calibrated wire speed control, voltage con-
trol, wire drive with enclosed 14 lb. wire reel, analog voltmeter
and various input control and electrode cable lengths.
The LN™-23P was designed specifically for Innershield pipe
welding, but, with the proper electrode, can be utilized for gen-
eral purpose welding.
The feeder is designed for welding with 14 pound coils of .068
and 5/64 Innershield self-shielding electrodes using a constant
voltage (CV) type DC power Source. When shipped, it is inter-
nally connected for welding with electrode negative polarity
(DC–). Depending upon which gun and cable is used, its rating
is either 350 amps or 250 amps at 60% duty cycle.
The wire speed control has a calibrated dial plate with a range
of 30 to 170 inches per minute which allows quick and easy set-
ting of the required wire feed speed. The wire speed is not
affected by changes in the arc voltage setting even though the
wire feed circuit is powered by arc voltage. A two-position
switch, mounted on the gun provides a reduced speed circuit.
This allows selection of either the preset wire speed or 83% of
the preset speed.
A low voltage gun trigger circuit turns both the power source
output and wire feed on and off. The gun trigger circuit is inter-
locked by a weld current sensing reed switch so that while weld-
ing, the gun trigger switch does not have to be held closed. The
welding process is stopped by pulling the gun away from the
work. The electrode remains cold until the gun trigger is operat-
ed again.
The LN™-23P voltage control is used to adjust the power
source output. Also included is an analog voltmeter which
allows easy setting of the arc voltage at the LN™-23P once the
arc is established.
LOADING THE WIRE REEL
(For machines that have code numbers Lower
than 11383.)
• Lay the LN™-23P flat with the wire reel cover up,
unclip the rubber retaining strap, and remove the
cover.
• Remove the center clamping nut and the cover plate
from the wire reel.
• Unpack the 14-pound coil of wire. Be sure not to
bend the side tangs of the coil liner and straighten
any tangs that may have been bent.
• Place the coil on the wire reel so the coil will unwind
when it rotates in a clockwise direction.
• Remove the start end of the coil from its holding slot
in the coil liner, cut off the bent end, straighten the
first few inches and thread it through the wire feed
conduit connected to the wire enclosure until several
inches of electrode are exposed. Be careful not to
release the electrode until it is through the wire feed
conduit; otherwise, it will unwind and tangle.
• Be sure all the lower tangs of the coil liner are flush
against the back half of the wire reel and that none
of the upper tangs are bent in against the coil.
• Replace the reel cover plate and the center clamping
nut.
• Replace the cover of the wire reel enclosure and clip
the retaining strap in place.
• Pull about 2 feet of the exposed end of the electrode
through the wire feed conduit. Slide the insulator all
the way up on the wire feed conduit.
Make a single, free loop in the electrode and feed
the end into the section of wire feed conduit connect-
ed to the gearbox. Press the gun trigger and push
the electrode into the drive rolls. Release the elec-
trode as soon as it is picked up by the drive rolls.
Continue feeding electrode until the excess length is
fed through the drive rolls. Watch the single loop and
guide it if necessary to make certain it untwists with-
out kinking. Do not feed electrode through the gun
cable at this time. Slide the insulator down on wire
feed conduit until it slips over section of conduit con-
nected to gearbox.
• Set the unit upright on floor, straighten the gun
cable, press the gun trigger, and feed electrode
though the gun and cable assembly.
SAFETY PRECAUTIONS
ELECTRIC SHOCK can kill.
• Do not touch electrically live parts
such as output terminals or internal
wiring.
• When inching with gun trigger, electrode and
drive mechanism are “hot” to work and ground
and could remain energized several seconds
after the gun trigger is released.
• Turn OFF input power at welding power source
before installation or changing drive roll and/or
guide tubes.
• Welding power source must be connected to
system ground per the National Electrical Code
or any applicable local codes.
• Only qualified personnel should perform this
installation.
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WARNING
LN™-23P