Mechanical Installation; Introduction; Control Box Installation - Lincoln Electric NA-3 Service Manual

A-4
MECHANICAL
INSTALLATION

INTRODUCTION

This section covers the basic requirements to
install the control box and welding head. This
section will give you mounting hole align-
ments, component mounting clearances,
and any special instructions or precautions
that must be followed when installing the
control box and mounting head.
FIGURE A.2 – CONTROL BOX
BACK RIGHT
MOUNTING
HOLE
INSTALLATION
WARNING
ELECTRIC SHOCK
can kill.
• Turn off input power to
the welding power source
using the disconnect
switch before working on
this equipment.
CARRIAGE MOUNTING.
CONTROL
BOX
ADAPTER
PLATE
BACK
COVER
CARRIAGE
NA-3 AND NA-4

CONTROL BOX INSTALLATION

The control box can be mounted either on
the standard travel carriage or on a separate
fixture. It is electrically grounded by a lead
in the input cable assembly.
To install the control box on the standard
travel carriage, perform the following steps
and refer to Figure A.2. Also see IM278 sec.
L.2.2.4.
1. Remove the back cover from control
box. Also see IM 278 Sec. L.2.2.4
2. Install a hex head screw up through
the bottom of the adapter plate and
the front left mounting hole in the
control box.
3. Secure the control box to the adapter
plate with a flat washer, lock washer,
and hex nut.
4. Place the control box/adapter plate
assembly onto the carriage and
secure it in place with a hex head
screw through
mounting hole of the control box.
5. Secure the adapter plate to the car-
riage with two hex head screws
through the front and back mounting
holes on the left side of the adapter
plate.
6. Install the back cover of the control
box.
Before you can mount the control box onto
a fixture, you must provide mounting holes
in the fixture per the measurements provided
in Figure A.3. When placing the mounting
holes, make sure you leave adequate
ventilation space below the front cover to
allow for the free circulation of cooling air.
A-4
the back right