K221 Start Controls Pc Board; K238 High Frequency Unit; K223 Solenoid Kit; K225 Submerged Arc Twinarc Kit - Lincoln Electric NA-3 Service Manual

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K221 START CONTROLS
PC BOARD
When this PC board is installed on the inner
panel of the control box, the circuit adjusts
starting current and voltage for an adjustable
period of time, as needed, to control
penetration, bead size, or other factors at
the start of a weld. The K221 Start Controls
PC Board must be used when using the
K237 Linc-Fill Starting Relay. Installation
instructions are shipped with each kit. The
operating sequence is contained in the
IM278 manual and can be ordered as
Sec. L3.4.1.

K223 SOLENOID KIT

The solenoid kit includes a valve to control
water flow when using the cooling
attachment on the K148 or K239 contact
nozzle assembly. It opens when the start
button is pressed and can be wired to close
either when the stop button is pressed or
when the arc goes out. Installation
instructions are shipped with each kit.
K225 SUBMERGED
ARC TWINARC KIT
The Twinarc kit provides for the feeding of
two 5/64, 3/32, or 1/8 in. (1.98, 2.38, or
3.18 mm) solid wires through a single wire
feeder. The electrode wire must be the
same size. The assembly includes a wire
reel, insulated reel mounting bracket, wire
straightener, dual wire guides, nozzle, and
contact block. Installation, operating, and
maintenance instructions are shipped with
each kit, are contained in the IM278 manual,
and can be ordered as Sec. L2.5.3 K225.
K237 LINC-FILL
STARTING RELAY
This relay improves starting characteristics
when using the K149 Linc-Fill Long Stickout
ACCESSORIES
Nozzle Extension assembly. The K221 Start
Controls PC Board is required. The K237
Linc-Fill Starting Relay can be mounted on
either the standard travel carriage or in a
convenient location near the feeding head
in accordance with the instructions shipped
with each kit.

K238 HIGH FREQUENCY UNIT

This unit supplies high frequency to the
welding leads for more positive starts, which
may be required for certain difficult starting
applications. Factory-installed insulation is
required. Instructions are shipped with each
unit. Installation instructions are contained
in the IM278 manual and can be ordered as
Sec. L2.3.3.
K239 TWINARC KIT FOR
INNERSHIELD
This kit provides for welding with two
Innershield electrodes. Two 3/32 in.
(2.38 mm) flux-cored electrodes are fed
through a single wire feeder. Both wires
must be the same size. The K239 kit
includes the nozzle equipped for water
cooling, drive rolls, drive roll locating collar,
idle roll assembly, ingoing and outgoing
guide tubes, wire straightener, wire reel, and
wire reel mounting shaft and insulation.
Instructions are included in the kit, are
contained in the IM278 manual, and can
also be ordered as Sec. L2.5.3 K239.
K245 CRATER
CONTROL BOARD
When this PC board is installed on the inner
panel of the control box, the circuit adjusts
the current and voltage for an adjustable
period of time to control bead size or fill
craters at the end of the weld. Installation
instructions are shipped with each kit. The
operating sequence is contained in the
IM278 manual and can be ordered as Sec.
L3.4.2.
NA-3 AND NA-4
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ELECTRODES
®