ERICO ESS-2500 User manual

RIEDfi
January
1990
FORM:
OM-125
676
MODEL:
ESS-2500
FLE
COPY
RETURN
TO
FOLDER
OWNERS
MANUAL
iMPORTANT:
Read and understand the entire
contents
of this
manual,
with
special
emphasis
on
the
safety
material
throughout
the
manual,
before
Installing,
operating,
or
maintaining
this
equipment.
This unit and these
instructions
are
for
use
only
by
persons
trained
and
experienced
in
the safe
operation
of
weiding
equipment.
Do
not
aiiow untrained
persons
to
instaii,
operate,
or
maintain
this
unit.
Contact
your
distributor
if
you
do
not
fully
understand
these instructions.
ERICOfi
fastening
Systems
PRINTED
IN
U.S.A

OM-125
878
11/89
RECEIVING-HANDLING
Before
unpacking equipment,
check
carton
for
any
dam-
Use the
following
spaces
to
record the Model
Designs-
age
that
may
have
occurred
during
shipment.
File
any
tion
and
Serial
or
Style
Number of
your
unit.
The
infor
claims
for
loss
or
damage
with
the
delivering
carrier.
mation
is
located
on
the
data card
or
the
nameplate.
Assistance
for
filing
or
settling
claims
may
be
obtained
from
the distributor and/or
the
equipment
manufactur-
Model
_______________________________
ers
Transportation Department.
Serial
or
Style
No.
____________________
When
requesting
information
about this
equipment,
al
ways
provide
the
Model
Description
and
Serial
or
Style
Date
of
Purchase
_____________________
Number.
TABLE OF
CONTENTS
Section
No.
Page
No.
SECTION
1
-
SAFETY
RULES
FOR
OPERATION
OF
ARC WELDING POWER
SOURCE
1-1.
Introduction
1
1-2.
General
Precautions
I
1-3.
Arc
Welding
4
1-4.
Standards Booklet Index
5
SECTION
2-
SAFETY
PRECAUTIONS
AND
SIGNAL WORDS
2-1.
General
Information
And
Safety
6
2-2.
Safety
Alert
Symbol
And
Signal
Words
6
SECTION
3
SPECIFICATIONS
3-1.
Volt-Ampere
Curves
7
3-2.
Duty
Cycle
7
3-3.
Description
8
SECTION
4
INSTALLATION
4-1.
Location
8
4-2.
Weld
Output
Connections
8
4-3.
Current And
Contactor Control
Connections
9
4-4.
Electrical
Input
Connections
9
SECTION
5-
OPERATOR
CONTROLS
5-1.
Power
Switch
11
5-2. Pilot
Light
11
5-3.
Range
Switch
11
5-4.
Current
Adjustment
Control
12
5-5.
Remote
Control
Receptacle
And
Current
Control
Switch
12
5-6.
Remote
Control
Receptacle
And
Contactor
Control Switch
12
5-7.
Arc
Control
Switch
13
SECTION
6
SEQUENCE
OF
OPERATION
6-1. Stud
Welding
13
6-2.
Shutting
Down
14

-I
Section
No.
Page
No.
SECTION
7
MAINTENANCE
&
TROUBLESHOOTING
7-1.
Routine
Maintenance
14
7-2. Rectifier
Protection
14
7-3.
Ovetload Protection
14
7-4.
Troubleshooting
15
SECTION
8
ELECTRICAL
DIAGRAMS
Diagram
8-1.
Circuit
Diagram
17
Diagram
8-2.
Circuit
Diagram
For Root Pass
Circuit
Board
PCI
18
Diagram
8-3.
Circuit
Diagram
For 3-Phase
Feedback
-
Burden
Board
PC2
19
SECTION
9
PARTS LIST
Figure
9-1.
Panel,
Front
W/Components
20
Figure
9-2.
Circuit
Card,
Root Pass
22
Figure
9-3.
Right
Side
View
24
LIST
OF
CHARTS
AND TABLES
Table
3-1.
Specifications
7
Chart
3-1.
Volt-Ampere
Curves
7
Chart
3-2.
Duty
Cycle
8
Table
4-1.
Weld
Cable Size
9
Table
4-2.
Input
Conductor
And Fuse
Size 11
Table 7-1.
Maintenance Schedule
14
Table
7-2.
Troubleshooting
16

SECTION
1
-
SAFETY
RULES
FOR
OPERATION
OF ARC WELDING POWER
SOURCE
1-1.
INTRODUCTION
We learn
by experience.
Learning
safety
through
per
sonal
experience,
like
a
child
touching
a
hot
stove
is
harmful,
wasteful,
and
unwise.
Let
the
experience
of
oth
ers
teach
you.
Safe
practices
developed
from
experience
in
the
use
of
welding
and
cutting
are
described
in
this
manual. Re
search,
development,
and
field
experience
have
evolved
reliable
equipment
and safe
installation,
opera
tion,
and
servicing
practices.
Accidents
occur
when
equipment
is
improperly
used
or
maintained.
The
rea
son
for
the
safe
practices
may
not
always
be
given.
Some
are
based
on
common
sense,
others
may
require
technical
volumes
to
explain.
It is wiser
to
follow the
rules.
Read and
understand
these
safe
practices
before
at
tempting
to
install,
operate,
or
service
the
equipment.
Comply
with
these
procedures
as
applicable
to
the
par
ticular
equipment
used
and their
instruction
manuals,
for
personal
safety
and
for
the
safety
of
others.
Failure
to
observe
these
safe
practices
may
cause
seri
ous
injury
or
death. When
safety
becomes
a
habit,
the
equipment
can
be
used
with confidence.
These
safe
practices
are
divided into
two
Sections:
1-General
Precautions,
common
to
arc
welding
and
cut
ting;
and 2-Arc
Welding
(and
Cutting)
(only).
Reference
standards:
Published
Standards
on
safety
are
also
available for
additional and
more
complete
pro
cedures
than those
given
in
this manual.
They
are
listed
in
the
Standards index
in
this manual.
ANSI Z49.
1
is the
most
complete.
The National
Electrical
Code,
Occupational
Safety
and
Health
Administration,
local
industrial
codes,
and local
inspection
requirements
also
provide
a
basis for
equip
ment
installation,
use,
and service.
1-2.
GENERAL
PRECAUTIONS
DIfferent
arc
welding
processes,
electrode
alloys,
and fluxes
can
produce
different
fumes,
gases,
and
radiation levels.
in
addition
to
the information
in
this
manual,
be
sure
to
consult
flux and
electrode
manu
facturers
Material
Safety
Data
Sheets
(MSDS5)
for
specific
technical
data and
precautionary
measures
concerning
their
material.
A.
Burn
Prevention
Wear
protective
clothing-gauntlet
gloves designed
for
use
in
welding,
hat,
and
high
safety-toe
shoes. Button
shirt collar
and
pocket flaps,
and
wear
cuff less
trousers
to
avoid
entry
of
sparks
and
slag.
Wear
helmet with
safety goggles
and
glasses
with side
shields
underneath,
appropriate
filter
lenses
or
plates
(protected by
clear
cover
glass).
This
is
a
MUST
for
welding
or
cutting,
(and
chipping)
to
protect
the
eyes
from
radiant
energy
and
flying
metal.
Replace
cover
glass
when
broken,
pitted,
or
spattered.
See
1
-3A.2.
Avoid
oily
or
greasy
clothing.
A
spark
may
ignite
them.
Hot
metal such
as
electrode
stubs and
workpieces
should
never
be handled
without
gloves.
Medical first aid and
eye
treatment.
First
aid
facilities
and
a
qualified
first aid
person
should
be
available for
each
shift unless
medical
facilities
are
close
by
for immediate
treatment
of flash burns
of the
eyes
and skin burns.
Ear
plugs
should be
worn
when
working
on
overhead
or
in
a
confined
space.
A
hard hat should
be
worn
when
others
work overhead.
Flammable
hair
preparations
should
not
be used
by
per
sons
intending
to
weld
or
cut.
B.
Toxic Fume
Prevention
Severe
discomfort,
illness
or
death
can
result from
fumes,
vapors,
heat,
or
oxygen
enrichment
or
depletion
that
welding
(or cutting)
may
produce.
Prevent
them with
adequate
ventilation,
as
described
in
ANSI
Standard
Z49.1
listed
in
Standards
Index. NEVER ventilate with
oxygen.
Lead
-,cadmium-, zinc-,
mercury
-,and
beryllium-bear
ing
and similar
materials,
when welded
(or
cut)
may pro
duce
harmful
concentrations
of toxic
fumes.
Adequate
local exhaust
ventilation
must
be
used,or
each
person
in
the
area as
well
as
the
operator
must
wear an
air-sup
plied
respirator.
For
beryllium,
both
must
be used.
Metals
coated
with
or
containing
materials that
emit
toxic
fumes should
not
be heated unless
coating
is
removed
from the work
surface,
the
area
is well ventilated
and
if
necessary,
while
wearing
an
air-supplied respirator.
Work
in
a
confined
space
only
while it is
being
ventilated
and,
if
necessary,
while
wearing
an
air-supplied
respira
tor.
Gas
leaks
in
a
confined
space
should be
avoided.
Leaked
gas
in
large
quantities
can
change
oxygen
con
centration
dangerously.
Do
not
bring
gas
cylinders
into
a
confined
space.
Leaving
confined
space,
shut
OFF
gas
supply
at
source
to
prevent
possible
accumulation of
gases
in
the
space
if
downstream
valves have been
accidentally opened
or
left
open.
Check
to
be
sure
that
the
space
is
safe
before
re-entering
it.
Vapors
from chlorinated solvents
can
be
decomposed
by
the heat
of
the
arc
(or
flame)
to
form
PHOSGENE,
a
highly
toxic
gas,
and other
lung
and
eye
irritating
prod
ucts.
The
ultraviolet
(radiant)
energy
of the
arc can
also
decompose trichloroethylene
and
perchloroethylene
vapors
to
form
phosgene.
DO NOT
WELD
or
cut
where
solvent
vapors
can
be drawn
into
the
welding
or
cutting
atmosphere
or
where the radiant
energy
can
penetrate
OM-125
676
Page
1

to
atmospheres
containing
even
minute
amounts
of
trichioroethylene
or
perchioroethylene.
C. Fire
and
Explosion
Prevention
Causes
of
fire and
explosion
are:
combustibles
reached
by
the
arc,
flame,
flying
sparks,
hot
slag
or
heated
mate
rial;
misuse
of
compressed
gases
and
cylinders;
and
short
circuits.
BE
AWARE
THAT
flying
sparks
or
falling
slag
can
pass
through
cracks,
along pipes,
through
windows
or
doors,
and
through
wail
or
floor
openings,
out
of
sight
of the
goggled
operator.
Sparks
and
slag
can
fly
35 feet.
To
prevent
fires
and
explosion:
Keep
equipment
clean
and
operable,
free
of
oil,
grease,
and
(in
electrical
parts)
of
metallic
particles
that
can
cause
short
circuits.
If
combustibles
are
in
area,
do
NOT
weld
or
cut.
Move
the
work
if
practicable,
to
an
area
free of
combustibles.
Avoid
paint
spray
rooms,
dip
tanks,
storage
areas,
venti
lators.
If
the
work
cannot
be
moved,
move
combustibles
at
least
35 feet
away
out
of reach of
sparks
and
heat;
or
protect
against
ignition
with
suitable
and
snug-fitting,
fire-resistant
covers or
shields.
Walls
touching
combustibles
on
opposite
sides
should
not
be welded
on
(or
cut).
Walls,
ceilings,
and
floor
near
work should
be
protected by
heat-resistant
covers
or
shields.
Fire watcher
must
be
standing
by
with
suitable fire extin
guishing equipment during
and for
some
time
afterweld
ing
or
cutting
if:
a.
appreciable
combustibles
(including
building
construction)
are
within 35
feet
b.
appreciable
combustibles
are
further
than 35
feet
but
can
be
ignited
by
sparks
c.
openings
(concealed
orvisible)
in
floors
orwalls
within
35
feet
may expose
combustibles
to
sparks
d.
combustibles
adjacent
to
walls,
ceilings,
roofs,
or
metal
partitions
can
be
ignited
by
radiant
or
conducted
heat.
Hot work
permit
should
be obtained before
operation
to
ensure
supervisors
approvalthat adequate precautions
have been taken.
After work
is
done,
check
that
area
is
free
of
sparks,
glowing
embers,
and flames.
An
empty
container that
held
combustibles,
or
that
can
produce
flammable
or
toxic
vapors
when
heated,
must
never
be welded
on
or
cut,
unless
container
has first
been
cleaned
as
described
in
AWS Standard
A6.O,
listed
7
In
Standards
Index.
This
includes:
a
thorough
steam
orcaustic
cleaning
(or
a
solvent
or
water
washing,
depending
on
the
combusti
bles
solubility)
followed
by
purging
and
inerting
with ni
trogen
or
carbon
dioxide,
and
using
protective
equip-
ment
as
recommended
in
A6.O.
Waterfilling
just
below
working
level
may
substitute
for
inerting.
A
container
with unknown
contents
should
be cleaned
(see
preceding
paragraph).
Do NOT
depend
on
sense
of
smell
or
sight
to
determine
if
it
is
safe
to
weld
or
cut.
Hollow
castings
or
containers
must
be
vented
before
welding
or
cutting. They
can
explode.
Explosive
atmospheres.
Never weld
or
cut
where the
air
may
contain flammable
dust,
gas,
or
liquid
vapors
(such
as
gasoline).
D.
Compressed
Gas
Equipment
Standard
precautions.
Comply
with
precautions
in
this
manual,
and those
detailed
in
CGA
Standard
P-i,
SAFE
HANDLING
OF
COMPRESSED GASES
IN
CYLIN
DERS,
listed
ii
in
Standards
Index.
1.
Pressure
Regulators
Regulator
relief valve
is
designed
to
protect
only
the
regulator
from
overpressure;
it
is
not
intended
to
protect
any
downstream
equipment.
Provide
such
protection
with
one or more
relief
devices.
Never
connect
a
regulator
to
a
cylinder
containing
gas
other than
that
for
which the
regulator
was
designed.
Remove
faulty regulatorfrom
service
immediately for
re
pair
(first
close
cylinder valve).
The
following
symptoms
indicate
a
faulty
regulator:
Leaks-if
gas
leaks
externally.
Excessive
Creep-if
delivery
pressure
continues
to
rise
with
downstream
valve closed.
Faulty
Gauge-if
gauge
pointer
does
not
move
off
stop
pin
when
pressurized,
nor
returns to
stop
pin
after
pressure
release.
Repair.
Do NOT
attempt
to
repair.
Send
faulty regulators
for
repair
to
manufacturers
designated repair
center,
where
special
techniques
and
tools
are
used
by
trained
personnel.
2.
Cylinders
Cylinders
must
be
handled
carefully
to
prevent
leaks
and
damage
to
their
walls,
valves,
or
safety
devices:
Avoid electrical circuit
contact
with
cylinders including
third
rails,
electrical
wires,
or
welding
circuits.
They
can
produce
short
circuit
arcs
that
may
lead
to
a
serious
acci
dent.
(See 1-3C.)
ICC
or
DOT
marking
must
be
on
each
cylinder.
It
is
an
assurance
of
safety
when
the
cylinder
is
properly
han
dled.
Identifying
gas
content.
Use
only
cylinders
with
name
of
gas
marked
on
them;
do
not
rely
on
color
to
identify
gas
content.
Notify
supplier
if
unmarked.
NEVER
DEFACE
or
alter
name,
number,
or
other
markings
on
a
cylinder.
It
is
illegal
and hazardous.
Empties: Keep
valves
closed,
replace
caps
securely;
mark
MT;
keep
them
separate
from
FULLS
and
return
promptly.
OM-125
676
Page
2

Prohibited
use.
Never
use
a
cylinder
or
its
contents
for
other
than
its
intended
use,
NEVER
as a
support
or
roller.
Locate
or
secure
cylinders
so
they
cannot
be
knocked
over.
Passageways
and work
areas.
Keep
cylinders
clear
of
areas
where
they
may
be
struck.
Transporting
cylinders.
With
a
crane,
use a
secure
sup
port
such
as a
platform
or
cradle.
Do
NOT
lift
cylinders
off
the
ground
by
their
valves
or
caps,
or
by
chains,
slings,
or
magnets.
Do
NOT
expose
cylinders
to
excessive
heat,
sparks,
slag,
and
flame,
etc.
that
may
cause
rupture.
Do
not
al
low
contents
to
exceed
130F.
Cool
with
water
spray
where
such
exposure
exists.
Protect
cylinders
particularly
valves
from
bumps,
falls,
falling
objects,
and weather.
Replace
caps
securely
when
moving cylinders.
Stuckvalve.
Do
NOTuse
a
hammerorwrenchtoopen
a
cylinder
valve
that
can
not
be
opened by
hand.
Notify
your
supplier.
Mixing
gases.
Never
try
to
mix
any
gases
in
a
cylinder.
Never
refill
any
cylinder.
Cylinderfittings
should
never
be
modified
or
exchanged.
3.
Hose
Prohibited
use.
Never
use
hose
other than
that
designed
for
the
specified
gas.
A
general
hose
identification
rule
is: red
for fuel
gas,
green
for
oxygen,
and black
for
inert
gases.
Use ferrules
or
clamps
designed
for
the
hose
(not
ordi
nary
wire
or
other
substitute)
as a
binding
to
connect
hoses
to
fittings.
No
copper
tubing
splices.
Use
only
standard brass fit
tings
to
splice
hose.
Avoid
long
runs
to
prevent
kinks and
abuse.
Suspend
hose oft
ground
to
keep
it
from
being
run
over,
stepped
on,
or
otherwise
damaged.
Coil
excess
hose
to
prevent
kinks
and
tangles.
Protect
hose
from
damage
by sharp
edges,
and
by
sparks,
slag,
and
open
flame.
Examine
hose
regularly
for
leaks,
wear,
and
loose
con
nections.
Immerse
pressured
hose
in
water;
bubbles
in
dicate leaks.
Repair
leaky
orwom
hose
by cutting
area
out
and
splic
ing
(1-2D3).
Do NOT
tape.
4.
Proper
Connections
Clean
cylinder
valve
outlet
of
impurities
that
may
clog
orif
ices and
damage
seats
before
connecting regulator.
Except
for
hydrogen,
crack
valve
momentarily, pointing
outlet
away
from
people
and
sources
of
ignition.
Wipe
with
a
clean
lintless
cloth.
Match
regulator
to
cylinder.
Before
connecting,
check
that the
regulator
label and
cylinder marking
area,
and
that the
regulator
inlet
and
cylinder
outlet match.
NEVEIR
CONNECT
a
regulator
designed
for
a
particular
gas
or
gases
to
a
cylinder
containing
any
other
gas.
Tighten
connections.
When
assembling
threaded
con
nections,
clean
and smooth
seats
where
necessary.
Tighten.
If
connection
leaks,
disassemble, clean,
and
retighten
using properly
fitting
wrench.
Adapters.
Use
a
CGA
adapter (available
from
your
sup
plier)
between
cylinder
and
regulator,
if
one
is
required.
use
two wrenches to
tighten
adapter
marked RIGHT
arid
LEFT
HAND
threads.
Regulator
outlet
(or
hose)
connections
may
be
identified
by
right
hand threads for
oxygen
and left
hand
threads
(with
grooved
hex
on
nut
or
shank)
for
fuel
gas.
5.
Pressurizing
Steps:
Drain
regulator
of
residual
gas
through
suitable
vent
be
fore
opening
cylinder (or
manifold
valve)
by
turning
ad
justing
screw
in
(clockwise). Draining
prevents
exces
sive
compression
heat
at
high
pressure
seat
by
allowing
seat to
open
on
pressurization.
Leave
adjusting
screw
engaged
slightly
on
single-stage regulators.
Stand
to
side
of
regulator
while
opening cylinder
valve.
Open
cylinder
valve
slowly
so
that
regulator
pressure
in
creases
slowly.
When
gauge
is
pressurized
(gauge
reaches
regulator maximum)
leave
cylinder
valve
in
fol
lowing position:
For
oxygen,
and inert
gases,
open
fully
to
seal
stem
against
possible
leak.
For
fuel
gas,
open
to
less
than
one
turn
to
permit
quick
emergency
shutoff.
Use
pressure
charts
(available
from your
supplier)
for
safe
and
efficient,
recommended
pressure
settings
on
regulators.
Check
for
leaks
on
first
pressurization
and
regularly
there-after. Brush
with
soap
solution
(capfull
of
Ivory
LJq
uid*
or
equivalent
per
gallon
of
water).
Bubbles
indicate
leak.
Clean
oft
soapy
water
after
test;
dried
soap
is
corn-
bust ible.
E.
User
ResponsibilItIes
Remove
leaky
or
defective
equipment
from service irn
mediately
for
repair.
See
User
Responsibility
statement
in
equipment
manual.
F.
LeavIng
EquIpment
Unattended
Close
gas
supply
at
source
and drain
gas.
G.
Rope
Staging-Support
Rope
staging-support
should
not
be
used
for
welding
or
cutting
operation;
rope may
burn.
*Trademark
of
Proctor
&
Gamble.
OM-125
676
Page
3

1-3.
ARC
WELDING
Comply
with
precautions
in
1-1,
1-2,
and
this
section.
Arc
Welding,
properly
done,
is
a
safe
process,
but
a
careless
operator
invites
trouble. The
equipment
carries
high
currents
at
significant
voltages.
The
arc
is
very
bright
and
hot.
Sparks
fly,
fumes
rise,
ultraviolet
and
in
frared
energy
radiates,
weldments
are
hot,
and
com
pressed
gases may
be
used.
The wise
operator
avoids
unnecessary
risks and
protects
himself and
others
from
accidents.
Precautions
are
described here and
in
stan
dards
referenced
in
index.
A.
Burn
Protection
Comply
with
precautions
in
1-2.
The
welding
arc
is
intense
and
visibly
bright.
Its
radiation
can
damage
eyes,
penetrate
lightweight clothing,
reflect
from
light-colored
surfaces,
and
burn the
skin
and
eyes.
Skin
burns
resemble
acute
sunburn,
those
from
gas-
shielded
arcs are more severe
and
painful.
DONT GET
BURNED;
COMPLY
WITH
PRECAUTIONS.
1.
Protective
Clothing
Wear
long-sleeve
clothing (particularly
for
gas-shielded
arc)
in
addition
to
gloves,
hat,
and
shoes
(1 -2A).
As
nec
essary,
use
additional
protective
clothing
such
as
leatherjacket
or
sleeves,
flame-proof
apron,
and
f
ire-re
sistant
leggings.
Avoid
outer
garments
of
untreated
cot
ton.
Bare
skin
protection.
Wear
dark,
substantial
clothing.
Button
collar
to
protect
chest
and neck and
button
pock
ets
to
prevent
entry
of
sparks.
2.
Eye
and Head
Protection
Protect
eyes
from
exposure
to
arc.
NEVER
look
at
an
electric
arc
without
protection.
Welding
helmet
or
shield
containing
a
fifter
plate
shade
no.
12
or
denser
must
be used
when
welding.
Place
over
face
before
striking
arc.
Protect filter
plate
with
a
clear
cover
plate.
Cracked
or
broken
helmet
or
shield
should NOT
be
worn;
radiation
can
pass
through
to
cause
bums.
Cracked,
broken,
or
loose
filter
plates
must
be
replaced
IMMEDIATELY.
Replace
clear
cover
plate
when
broken,
pitted,
or
spattered.
Flash
goggles
with
side
shields MUST
be
worn
under
the
helmet
to
give
some
protection
to
the
eyes
should
the
helmet
not
be
lowered
over
the face
before
an
arc
is
struck.
Looking
at
an arc
momentarily
with
unprotected
eyes
(particularly
a
high
intensity
gas-shielded
arc)
can
cause a
retinal
burn
that
may
leave
a
permanent
dark
area
in
the
field
of
vision.
3.
Protection
of
Nearby
Personnel
Enclosed
welding
area.
For
production
welding,
a
sepa
rate
room
or enclosed
bay
is
best.
In
open
areas,
sur
round
the
operation
with
low-reflective,
non-combusti
ble
screens
or
panels.
Allow
for free
air
circulation,
par
ticularly
at
floor
level.
Viewing
the
weld. Provide face shields for
all
persons
who
will
be
looking
directly
at
the
weld.
Others
working
in
area.
See
that
all
persons
are
wearing
flash
goggles.
Before
starting
to
weld,
make
sure
that
screen
flaps
or
bay
doors
are
closed.
B.
Toxic
Fume Prevention
Comply
with
precautions
in
1
-2B.
Generator
engine
exhaust
must
be vented
to
the
outside
air.
Carbon
monoxide
can
kill.
C.
Fire
and
ExplosIon
Prevention
Comply
with
precautions
in
1-2C.
Equipments
rated
capacity.
Do
not
overload
arc
welding
equipment.
It
may
overheat
cables
and
cause
a
fire.
Loose cable
connections
may
overheat
or
flash
and
cause a
fire.
Never
strike
an
arc
on
a
cylinder
or
other
pressure
ves
sel.
It
creates
a
brittle
area
that
can
cause
a
violent
nip
ture
or
lead
to
such
a
rupture
under
rough
handling.
D.
Compressed
Gas
Equipment
Comply
with
precautions
in
1
-2D.
E.
Shock
Prevention
Exposed
hot
conductors
or
other bare metal
in
the
weld
ing
circuit,
or
in
ungrounded,
electrically-HOT
equip
ment
can
fatally
shock
a
person
whose
body
becomes
a
conductor.
DO
NOT
STAND,
SIT, LIE,
LEAN
ON,
OR
TOUCH
a
wet
surface when
welding,
without suitable
protection.
To
protect
against
shock:
Wear
dry insulating
gloves
and
body
protection.
Keep
body
and
clothing
dry.
Never
work
in
damp
area
without
adequate
insulation
against
electrical
shock.
Stay
on
a
dry
duckboard,
or
rubber
mat
when
dampness
or
sweat
can
not
be
avoided.
Sweat,
sea
water,
or
moisture
be
tween
body
and
an
electrically
HOT
part
or
grounded
metal reduces
the electrical
resistance,
and
could
en
able
dangerous
and
possibly
lethal
currents to
flow
through
the
body.
A
voltage
will
exist between the
electrode
and
any
con
ducting
object
in
the work
circuit.
Examples
of
conduct
ing objects
include,
but
are
not
limited
to,
buildings,
elec
trical
tools,
workbenches,
welding
power
source
cases,
workpieces,
etc.
Never
touch
the
electrode
and
any
metal
object
unless
the
welding
power
source
is off.
1.
Grounding
the
Equipment
Arc
welding
equipment
must
be
grounded
according
to
the National
Electrical
Code,
and the
work
must
be
grounded
according
to
ANSI
Z49.1
Safety
In
Welding
And
Cutting.
When
installing,
connect
the frames
of
each
unit
such
as
welding
power
source,
control,
worktable,
and
water
cir
culatorto
the
building
ground.
Conductors
must
be
ade
quate
to
carry
ground
currents
safely. Equipment
made
OM-125
676
Page
4

electrically
HOT
by
stray
current
may
shock,
possibly
I
a-
tally.
Do
NOT
GROUND
to
electrical
conduit,
orto
a
pipe
carrying
ANY
gas
or
flammable
liquid
such
as
oil
or
fuel.
Three-phase
connection.
Check
phase
requirements
of
equipment
before
installing,
If
only
3-phase
power
is
available,
connect
single-phase
equipment
to
only
two
wires
of
the
3-phase
line.
Do
NOT connect
the
equip
ment
ground
lead
to
the
third
(live)
wire,
or
the
equip
ment
will become
electrically
HOT-a
dangerous
condi
tion
that
can
shock,
possibly
fatally.
Before
welding,
check
ground
for
continuity.
Be
sure
conductors
are
touching
bare
metal
of
equipment
frames at
connections.
If
a
line
cord
with
a
ground
lead
is
provided
with
the
equipment
for
connection
to
a
switchbox,
connect
the
ground
lead
to
the
grounded
switchbox.
II
a
three-prong
plug
is
added
for
connection
to
a
grounded
mating
re
ceptacle,
the
ground
lead
must
be
connected
to
the
ground
prong
only.
If
the
line cord
comes
with
a
three-
prong
plug,
connect
to
a
grounded
mating
receptacle.
Never
remove
the
ground
prong
from
a
plug,
or
use
a
plug
with
a
broken
off
ground
prong.
2.
Electrode
Holders
Fully
insulated
electrode
holders
should be used.
Do
NOT
use
holders
with
protruding
screws.
3.
Connectors
Fully
insulated
lock-type
connectors
should
be
used
to
join
welding
cable
lengths.
4. Cables
Frequently inspect
cables
for
wear,
cracks and
damage.
IMMEDIATELY
REPLACE
those with
excessively
worn
or
damaged
insulation
to
avoid
possibly-lethal
shock
from
bared cable.
Cables
with
damaged
areas
may
be
taped
to
give
resistance
equivalent
to
original
cable.
Keep
cable
dry,
free
of
oil
and
grease,
and
protected
from hot
metal and
sparks.
5.
Terminals
And
Other
Exposed
Parts
Terminals
and other
exposed
parts
of electrical units
should
have
insulating
covers
secured before
operation.
6.
Electrode
a.
Equipment
with
output
on/off control
(contactor)
Welding
power
sources
for
use
with
the
gas
metal
arc
welding
(GMAW),
gas
tungsten
arc
welding
(GTAW)
and similar
processes
nor
mally
are
equipped
with devices that
permit
on
oft control of the
welding
power
output.
When
so
equipped
the
electrode wire
becomes
electri
cally
HOT
when
the
power
source
switch is
ON
and the
welding
gun
switch is
closed.
Never
touch the
electrode wire
or
any
conducting
ob
ject
in
contact
with the
electrode ciltuit unless
the
welding
power
source
is
off.
b.
Equipment
without
output
on/off control
(no
contactor)
Welding
power
sources
used with
shielded
metal
arc
welding
(SMAW)
and
similar
proc
esses
may
not
be
equipped
with
welding
power
output
on-off control devices.
With such
equip
ment
the
electrode
is
electrically
HOTwhen
the
power
switch
is turned
ON.
Never touch
the
electrode unless
the
welding
power
source
is
off.
7.
Safety
Devices
Safety
devices
such
as
interlocks
and circuit
breakers
should
not
be disconnected
or
shunted
out.
Before
installation,
inspection,
or
service,
of
equipment,
shut
OFF
all
power
and
remove
line fuses
(or
lock
or
red-
tag
switches)
to
prevent
accidental
turning
ON
of
power.
Disconnect
all
cables
from
welding
power
source,
and
pull
all
115
volts
line-cord
plugs.
Do
not
open power
circuit
or
change
polarity
while weld
ing.
If,
in
an
emergency,
it
must
be
disconnected,
guard
against
shock
burns,
or
flash
from switch
arcing.
Leaving
equipment
unattended.
Always
shut
OFF
and
disconnect
all
power
to
equipment.
Power disconnect switch
must
be available
near
the
welding
power
source.
F. ProtectIon
For Wearers
of Electronic
Life
Sup
port
DevIces
(Pacemakers)
Magnetic
fields from
high
currents
can
affect
pacemaker
operation.
Persons
wearing
electronic
life
support
equipment
(pacemaker)
should consult
with
their
doctor
before
going
near arc
welding, gouging,
or
spot
welding
operations.
1-4.
STANDARDS
BOOKLET
INDEX
For
more
information,
refer
to
the
following
standards
or
their latest revisions
and
comply
as
applicable:
1.
ANSI
Standard
Z49.1,
SAFETY
IN
WELDING AND
CUTTING
obtainable
from the American
Welding
Society,
550
N.W.
LeJeune
Ad,
Miami,
FL
33126.
2.
NIOSH,
SAFETY
AND HEALTh
IN
ARC WELDING
AND
GAS WELDING
AND
CUTTING
obtainable
from the
Superintendent
of
Documents,
U.S. Gov
ernment
Printing
Office,
Washington,
D.C.
20402.
3.
OSHA,
SAFETY
AND HEALTh
STANDARDS,
29CFR
1910,
obtainable
from the
Superintendent
of
Documents,
U.S.
Government
Printing
Office,
Washington,
D.C.
20402.
4. ANSI Standard
Z87.1,
SAFE
PRACTICES FOR
OCCUPATION
AND
EDUCATIONAL
EYE AND
FACE PROTECTION
obtainable from the American
National
Standards
Institute,
1430
Broadway,
New
York,
NY
10018.
5.
ANSI Standard
Z41.1,
STANDARD
FOR MENS
SAFETY-TOE FOOTWEAR
obtainable from
the
American National
Standards
Institute,
1430 Broad
way,
New
York,
NY
10018.
6.
ANSI Standard
Z49.2,
FIRE
PREVENTION
IN
THE
USE
OF
CUTTING
AND
WELDING
PROCESSES
OM-1
25676
Pago
5

obtainable
from
the American
National
Standards
Institute,
1430
Broadway,
New
York,
NY
10018.
7.
AWS
Standard
A6.0,
WELDING
AND
CUTTING
CONTAINERS WHICH
HAVE
HELD
COMBUS
TIBLES
obtainable
from
the
American
Welding
So
ciety,
550
N.W.
LeJeune
Rd,
Miami,
FL
33126.
8.
NFPA
Standard
51,
OXYGEN-FUEL
GAS SYS
TEMS
FOR
WELDING,
CUTTING,
AND
ALLIED
PROCESSES
obtainable
from the
National
Fire
Protection
Association,
Batterymarch
Park,
Quincy,
MA
02269.
9.
NFPA
Standard
70,
NATIONAL ELECTRICAL
CODE
obtainable
from the
National
Fire
Protection
Association,
Batterymarch
Park,
Quincy,
MA
02269.
10.
NFPA
Standard
51B,
CUTTING
AND
WELDING
PROCESSES
obtainable
from
the
National
Fire
Protection
Association,
Batterymarch
Park,
Quincy,
MA
02269.
11. CGA
Pamphlet
P-i,
SAFE HANDLING
OF COM
PRESSED
GASES
IN
CYLINDERS
obtainable
fromtt,e
Con~ressed
Gas
Association,
1235 Jeffer
son
Davis
Highway,
Suite
501,
Arlington,
VA 22202.
12. CSA
Standard
W117.2,
CODE
FOR
SAFETY
IN
WELDING
AND
CUTTING
obtainable from
the
Ca
nadian
Standards
Association,
Standards
Sales,
178
Rexdale
Boulevard,
Rexdale,
Ontario,
Canada
M9W 1R3.
13.
NWSA
booklet,
WELDING
SAFETY BIBLIOGRA
PHY
obtainable from
the
National
Welding
Supply
Association,
1900
Arch
Street,
Philadelphia,
PA
19103.
14.
American
Welding
Society
Standard
AWSF4.1,
RECOMMENDED
SAFE
PRACTICES
FOR THE
PREPARATION
FOR WELDING
AND
CUTTING
OF
CONTAINERS
AND
PIPING
THAT
HAVE HELD
HAZARDOUS
SUBSTANCES,
obtainable from
the
American
Welding
Society,
550
N.W.
LeJeune
Rd,
Miami,
FL
33126.
15. ANSI
Standard
Z88.2,
PRACTICE
FOR
RESPIRA
TORY
PROTECTION,
obtainable
from the Ameri
can
National
Standards
Institute,
1430
Broadway,
New
York,
NY
10018.
SECTION
2-
SAFETY PRECAUTIONS
AND
SIGNAL
WORDS
2-1.
GENERAL
INFORMATION
AND
SAFETY
A.
General
Information
presented
in
this manual
and
on
various
la
bels,
tags,
and
plates
on
the
unit
pertains
to
equipment
design,
installation,
operation,
maintenance,
and
troubleshooting
which should
be
read,
understood,
and
followed
for
the
safe
and
effective
use
of this
equipment.
The
nameplate
of this unit
uses
international
symbols
for
labeling
the
front
panel
controls.
The
symbols
also
ap
pear
at
the
appropriate
section
in
the
text.
B.
Safety
The
installation,
operation,
maintenance,
and trouble
shooting
of
arc
welding equipment requires
practices
and
procedures
which
ensure
personal
safety
and
the
safety
of
others.
Therefore,
this
equipment
is
to
be
in
stalled,
operated,
and maintained
only by qualified
per
sons
in
accordance with
this
manual and
all
applicable
codes
such
as,
but
not
limited
to,
those
listed
at
the
end
of
Section
1

Safety
Rules
For
Operation
Of
Arc Weld
ing
Power
Source.
2-2.
SAFETY
ALERT
SYMBOL
AND
SIGNAL
WORDS
The
following
safety
alert
symbol
and
signal
words
are
used
throughout
this manual
to
call
attention
to
and
iden
tify
different
levels
of
hazard
and
special
instructions.
a
This
safety
alert
symbol
is
used with the
signal
words
WARNING
and
CAUTION
to
call
atten
tion
to
the
safety
statements.
a
a
WARNING
statements
identify
procedures
or
practices
which
must
be
followed
to
avoid seri
ous
personal injury
or
loss
of
life.
CAUTION
statements
identify
procedures
or
practices
which
must
be followed
to
avoid minor
personal
injury
or
damage
to
this
equipment.
IMPORTANT
statements
identify
special
instructions
necessary
for the
most
efficient
operation
of this
equip
ment.
OM-125
676
Page
6

7/16
In.
(11.1
mm)I
DIa.4HoIes~
SECTION
3-
SPECIFICATIONS
Table
3-1.
SpecifIcations
FIgure
3-1.
Overall Dimensions
And Base
Mounting
Hole
Layout
100
90
80
70
~60
~50
~40
30
20
10
3-1.
VOLT-AMPERE
CURVES
(Chart
3-1)
The
volt-ampere
cures
show
the
voltage
and
amperage
output
capabilities
of the
welding
power
source
at
the
mm.
and
max.
values of the
CURRENT
ADJUSTMENIT
control
setting.
Curves
of
other
settings
will
fall
between
the
curves
shown.
With the
use
of
the
volt-ampere
curves,
it
is
possible
to
determine
the
weld
current at
any
particular
load vo~
age.
3-2. DUTY
CYCLE
(Chart
3-2)
The
duty cycle
of
a
welding
power
source
is
the
percent
age
of
a
ten minute
period
that
a
welding
power
source
can
be
operated
at
a
given
output
without
causing
over
heating
and
damage
to
the unit. This
welding
power
source
is rated
at
25%
duty
cycle.
This
means
that the
welding
power
souive
can
be
operated
at
rated
load
for
2.5 minutes
out
of
every
ten.
During
the
remaining
7.5
minutes,
the
unit
should
operate
with
no
load
to
permit
proper
cooling.
If
the
welding
amperes
are
decreased,
the
duty cycle
will
increase.
Chart
3-2 enables
the
opera
tor to
determine
the
output
of the
welding
power
source
at
various
duty
cycles.
Rated
Welding
Current
Amperes
At
25%
Duty
Cycle
2000@
60 Volts
Welding
Current
Ranges
In
Amperes
30-415
~
Max.
Open-
Circuit
Voltage
100
Input
At
Rated
Load
Output
60
Hz
Three-Phase

Amperes
At
200V
I
230V
I
460V
kva
I
I
632
550 275
219
kw
153
Weight
Net
1011
lbs.
(459 kg)

Ship
1136 lbs.
(515
kg)
-
-n

~
I
Ruse
Mountint
Hole
Layoult
Inches Millimeter,
A
2 50.8
B 34-3/8
873.1
C
D
38-3/4
984.2__:
3/4
19
E
F
27
685.8__:
25-3/8
644.5__-
G
40-1/8 1019.1
H
2-3/4
69.9
-
B~
Chart
3-1.
Volt-Ampere
Curves
800 1200 1800
2000
2400
2800
DC
AMPERES
B.IV
180
OM-125
676
Page
7

Chart
3-2.
Duty Cycle
CAUTION: EXCEEDING DUTY
CYCLE
RAT.
INGS
will
damage
the
welding
power
source.

Do
not
exceed
indicated
duty
cycles.
3-3.
DESCRIPTION
This unit
is
a
three-phase
dc
constant
current
with
solid-
state
control. It
produces
dc
weld
current
and
is
de
signed
to
be
used
for
stud
welding.
SECTION 4-INSTALLATION
4-1.
LOCATION
(FIgure
3-1)
a
CAUTION:
FALLING EQUIPMENTcan
cause
serious
personal
Injury
and
equipment
dam
age.

Use
lifting
eye
to
lift
unit
only,
NOT
running
gear,
gas
cylinders,
or
any
other
heavy
accesso
Ties.

Use
equ
ipmentof
adequate
capacity
to
lift
the
unit.

It
using
lift
forks to handle
this
unit,
be
sure
the
llft
forks
are
long
enough
to
extend
out
of the
op
posite
side
of
the
base.
Using
lift
forks
too short
will
expose
internal
com
ponents
to
damage
should the
tips
of
the
lift
forks
penetrate
the
bottom
of
the
unit.
RESTRICTED
AIR
FLOW
causes
overheat
ing
and
possible damage
to
Internal
parts.

Maintain
at
least
18
inches
(457
mm)
of
unre
stricted
space
on
all sides
of
unit and
keep
un
derside
free of obstructions.

Do
not
place
any
filtering
device
over
the
in
take air
passages
of
(his
welding
power
source.
Warranty
is
void
if
any
type
of
filtering
device
is
used.
This
welding
power
source
has
a
lifting
device
for
mov
ing
the unit
and
holes
in
the base for
mounting
purposes.
Figure
3-1
gives
overall
dimensions
and base
mounting
hole
layout.
The
location
should
allow
room
to
remove
cover
and
side
panels
for
maintenance
and
repair.
The
service
life and
efficiency
of
this
unit
are
reduced
when the
unit is
subjected
to
high
levels
of
dust,
dirt,
moisture,
corrosive
vapors,
and
extreme
heat.
4-2. WELD
OUTPUT CONNECTIONS
(Figure
5-1)
To obtain the
full
rated
output
from this
unit,
it
is
neces
sary
to
select, install,
and maintain
proper
welding
ca
bles.
Failure
to
comply
in
any
of
these
areas
may
result
In
less than
satisfactory welding
performance.
A.
Welding
Cables
If
welding
cables
were
not
ordered
with this
unit,
the
steps
listed below should
be
followed
to
ensure
the best
welding performance.
1.
Keep
cables
as
short
as
possible,
and
place
cables
close
together.
Excessive cable
length
adds
resis
tance
which
may
reduce
output
or
cause
overload
ing
of
the
unit.
2.
Use weld cable
with
an
insulation
voltage
rating
equai
to
or
greater
than the maximum
open-circuit
voltage
(ocv)
of the
welding
power
source
(see
Table
3-1)
for
unit maximum
ocv
rating).
3.
Select
adequate
size
welding
cable for
the
antici
pated
maximum
weld
current.
Use
total
length
of
welding
cable
in
the
circuit
to
determine
cable size.
For
example,
if
the electrode
holder cable
is
75 feet
(23 m)
long
and
the
work cable is 25
leet
(8 m)
long,
select the size cable
recommended
in
Table
4-1
for
lOOft(31
m).
4.
Do
not
use
damaged
or
frayed
cables.
5. Install
correct
size
iugs
of
adequate
amperage
ca
pacity
onto
ends of both
cables
for
connecting
to
work
clamp,
stud
welding
device,
and weld
output
terminals.
6.
Install
stud
welding
device
onto
cable
following
manufacturers instructions.
An
insulated
stud
weld
ing
device
must
be
used
to
ensure
operator
safety.
7.
Install
work
clamp
onto
cable.
2400
2000
1000
~
~00
~eoo
400
10 16
202630
4060007000100
X DUTY
CYCLE
B-127
181A
OM-125
676
Pages

Table
4-1.
weld
Cable Size
.
~
Total
Cable
(Copper)
Length
in
Weld
Circuit
Not
Exceeding
_______
100 ft.
OrLess
(30m)
150 ft.
(45m)
200 ft.
(60m)
250 ft.
(70m)
30011.
(90m)
35011.
1
(105m)
~
40011.
(120m)
10
To
60%
Duty
Cycle
60
Thru
100%
Duty
Cycle
10 Thn~
100%
Duty
Cycle
100
150
200
250
300
350
400
500
600
700
800
900
4
3
3
2
1
1/0
1/0
2/0
3/0
4/0
4/0
2-2/0
4
3
2
1
1/0
2/0
2/0
3/0
4/0
2-2/0
2-2/0
2-3/0
4
2
1
1/0
210
3/0
3/0
4/0
2-2/0
2-3/0
2-3/0
2-4/0
3
1
1/0
210
3/0
4/0
4/0
2-210
2-3/0
2-4/0
2-4/0
3-3/0
2
1/0
2/0
3/0
4/0
2-2/0
2-210
2-3/0
2-4/0
3-3/0
3-4/0
3-4/0
1
2/0
3/0
4/0
2-210
2-3/0
2-3/0
2-4/0
3-3/0
3-4/0
3-4/0
4-4/0
1/0
3/0
4/0
2-2/0
2-3/0
2-3/0
2-4/0
3-3/0
3-4/0
3-4/0
4-4/0
4-4/0
1/0
3/0
4/0
2-2/0
2-3/0
2-4/0
2-4/0
3-3/0
3-4/0
4-4/0
4-4/0
 -
WeId
cable size
(AWG)
is
based
on
either
a
4
volts
or
less
drop
or
a
current
density
of
more
than
300 circular
mils
per
ampere. S-000718-88
B.
Installation
A~
WARNING:
ELECTRIC
SHOCK
can
kill.

Do
not
touch
live electrical
parts.

Shutdown
welding
po
wersource,
and
discon
nect
input
power
employing lockout/tagging
procedures
before
inspecting
or
installing.
Lockout/tagging procedures
consist of
pad
locking
line disconnect switch
in
open
position,
removing
fuses from fuse
box,
or
shutting
off and
red-tagging
circuit breaker
or
other disconnect
ing
device.
1. Connect
work cable
to
NEGATIVE
weld
output
ter
minal.
2.
Connect
electrode cable
to
POSITIVE
weld
output
terminal.
IMPORTANT: The
connections
given
are
fordc
reverse
polarity.
If
dc
straight polarity
is
desired,
reverse
cable
connections
to
weld
output
terminals
(work
becomes
positive).
4-3.
CURRENT
AND
CONTACTOR
CONTROL CON
NECTIONS
(Figure
5-1)
IMPORTANT:
Although
the
term CONTACTOR
is used
on
the
nameplate
and
throughout
this
manual,
the
out
put
is
not
switchedon
oroff
bya
physicalsecondary
con
tactor;
rather
the
output
is
controlled
by
a
Silicon
Con
trolled
Rectifier
(5CR)
stack which
functions
as a con-
factor.
The REMOTE
CONTROL
receptacle
pi~vides
a
junc
tion
point
for
connecting
a
Remote
Contactor
and/or
a
Remote
Current Control
to
the internal
circuitry
of the
welding
power
source.
To
connect
the Remote
Contac
tor
and/or
Current
Control
to
the
REMOTE
CONTROL
receptacle,
insert the
five-pin
plug
from the
Remote
Control
fully
into
the
receptacle
and
rotate
threaded col
lar
clockwise.
4-4.
ELECTRICAL
INPUT
CONNECTIONS
a
a
WARNING:
ELECTRIC SHOCK
can
kill.

Do
not
touch live
electrical
parts.

Shutdown
welding
powersource,
and discon
nect
input
power employing
lockout/tagging
procedures
before
inspecting
or
installing.
Lockout/tagging
procedures
consist
of
pad
locking
line
disconnect
switch
in
open
position,
removing
fuses from
fuse
box,
or
shutting
off and
red-tagging
circuit
breaker
or
other disconnect
ing
device.
CAUTION:
INCORRECT
INPUT
VOLTAGE
JUMPER
LINK
PLACEMENT
can
damage
unit.

Position
jumper
links
as
shown
on
the
input
voltage
label
(see
Figure
4-2).

Store
unused
jumper
links
across
linked
ter
minals.
A.
Electrical
Input RequIrements
This
welding
power
source
is
designed
to
be
operated
from
a
three-phase,
60
Hertz,
ac
power
supply
which
has
a
line
voltage
rating
that
corresponds
with
one
of
the
electrical
input voltage
shown
on
the
nameplate
or
input
OM-125
676
Page
9


.
FIgure
4-2.
Input
Conductor
Connections
200
VOLTS
data
label.
Consult
the
local
electric
utility
if
there
is
any
question
about the
type
of
electrical
system
available
at
the
installation
site
or
how
proper
connections
to
the
welding
power
source are
to
be made.
B.
Matching
The
Welding
Power
Source
To
The
Available
Input
Voltage (Figure
4-1
And
Figure
4-2)
This
unit
is
equipped
with
input voltage
jumper
links
either
installed
or
in
a
bag
on
the
jumper
link
board
to
al
low
operation
from
different
line
voltages.
If
installed,
the
jumper
links
are
positioned
forthe
highest
voltage
stated
on
the
nameplate
or
input
data
label.
If in
a
bag,
proper
installation
is
necessary
before
operation.
Open
right
side
access
door.
Reposition
or
install
if
appli
cable
the
jumper
links
onto
the
jumper
link
board
to
match
the
available
line
voltage
positions
shown
on
the
input
voltage
label
(see
Figure
4-1).
230
VOLT
o~~'
~
G~D.
0Li
'L2
~L3~I~fl
460
VOLTS
G~D.
'LI
'L2
'L~3Ot~fl~
R~.
A.031
770
FIgure
4-1.
Input
Voltage
Label
Ground
Conductor
Une Disconnect
Switch
2-112
~n.
(63.5
mm)
Access
Hole
REAR
VIEW
RIGHT
SIDE
VIEW
OM-125
676
Page
10

C.
Welding
Power
Source
To
input
Power
Supply
Connections
(Figure
4-2)
a
WARNING:
ELECTRIC
SHOCK
can
kill.

Do
not
touch
live
electrical
parts.

Install
a
fusible
line
disconnect
switch
in
the
input
circuit
to
the
welding
power
source.

Connect
input
conductors
to
the
welding
power
source
before
connecting
to
the three-
phase
input
power.

Read
and
follow
safety
information
at
begin-
fling
of entire
Section
4-4.
The line
disconnect
switch
provides
a
safe and
convenient
means
to
completely
remove
all
electrical
power
from
the
welding
power
source
whenever it is
necessary
to
inspect
or
service
the
unit.
Table
4-2.
Input
Conductor
And
Fuse
Size*
input
Voltage
200
230 460
Input
Conductor
Size
1750
MCM
1250
MCM
300
MCM
Ground
Conductor
Size
(AWG)
2/0
1/0
3
Fuse
Size
In
Amperes
900 800 400
*Conductor
size
is
based
on
the
1987
Edition
of the
National
Electrical
Code
(NEC) specifications
for allowable
am
pacities
of
insulated
copper
conductors,
having
a
tempera
ture
rating
of
167F
(75C).
with
not
more
than three
single
current-carrying
conductors in
a
raceway
(Article
310
of
NEC). (The
ground
conductor is
not counted
as a
current-
carrying
conductor.)
*Fuse
size is
based
on
not
more
than 200
percent
of the
rated
input
amperage
of the
welding
power
source
(Article
630
of
NEC).
5.0092111.88
1.
Use Table
4-2
as a
guide
to
select
input
conductors
for
the
installation. The
input
conductors
should be
covered
with
an
insulating
material that
complies
with
national,
state,
and local electrical
codes.
2.
Install
terminal
lugs
of
adequate
amperage
capacity
and
correct
stud size
onto
the
input
and
ground
con
ductors.
3.
Open
right
side
access
door.
a
WARNING: ELECTRIC SHOCK
can
kill.

Do
not
touch
live
electrical
parts.

Do
not connect
an
input
conductor
to
ihe
ground
terminal
in
the unit.

Do
not connect
the
ground
conductor
to
an
in
put
line terminaL
Incorrect
input
connections
can
result
in
an
elec
trically energized welding
power
source
chassis.
The
ground
terminal is
connected
to
the
welding
power
source
chassis and is for
grounding
pur
poses
only.
4.
Obtain
and install
a
standard
conduit
strain relief
connector
into the
rear
panel
access
hole.
5.
Insert conductors
through
strain
relief installed
in
Step
4.
Route
conductors
to
the
input
terminal
board.
6.
Connect
input
conductors
to
line
terminals
on
the
in
put
terminal board
(see
Figure
4-2).
7.
Connect
the
ground
conductor
to
the
ground
termi
nal
(see
Figure
4-2).
8.
Connect
remaining
end of
ground
conductor
to
a
suitable
ground.
Use
a
grounding
method
that
com
plies
with all
applicable
electrical
codes.
9.
Connect
remaining
ends
of
input
conductors
to
a
deenergized
line
disconnect switch.
10.
Secure
the
input
cable
in
the strain relief.
11.
Close
and
secure
the side
panel
access
door.
12.
Use Table
4-2
as
aguideto
select, obtain,
and install
proper
fuses for the
disconnect
switch.
SECTiON
5-
OPERATOR CONTROLS
5-1.
POWER
SWITCH
(Figure
5-1)
Pressing
the
POWER
switch
ON
push
button
energizes
the
welding
power
source.
Pressing
the
POWER
switch
OFF
push
button
shuts
down the
welding
power
source.
IMPORTANT:
When
the
POWER
switch
ONpushbut
ton
is
pressed,
the
pilot
light
comes
on,
but
the fan
motor
does
not
run
unless the
internal
components
are
already
warm.
The
fan
motor
is
thermostatically
controlled and
only
operates
when
additional
cooling
is
required
(see
Section
7-2).
IMPORTANT:
After
any
interruption
of
input
power,
the
POWER
switch
ON
push
button
must
be
depressed
to
reenergize
the
welding
power
source.
5-2.
PILOT LIGHT
(Figure
5-1)
The
pilot
light
comes on
whenever
the
POWER
switch is
in
the
ON
position
and
indicates
that the unit
is
receiviing
input
power.
5-3.
RANGE SWITCH
(Figure
5-1)
The
RANGE
switch
provides
the
means
of
selecting
be
tween
the
two
coarse
output
ranges.
When
the
RAN(3E
switch is
in
the
LOW
position,
ensure
that
the
LOW
cur
rent
scale is used
when
adjusting
the
CURRENT
AD
JUSTMENTcontroI.
When
inthe
HI
position,
ensure
that
the
HI
current
scale
is used
when
adjusting
the
CUR
RENT
ADJUSTMENT
control.
OM-125
676
Page
11

Remoti
Current
N.
And
Contactor
Control
Receptacle
Arc
Control Switch

Contactor
Control
Switch
5-4.
CURRENT
ADJUSTMENT
(Figure
5-1)
FIgure
5-1. Front Panel
View
The
CURRENT ADJUSTMENT
control
provides
the
means
of
selecting
the
exact current
desired
within the
range
being
used. Rotate the control
clockwise
to
in
crease
the
current
output.
IMPORTANT: The
CURRENT
ADJUSTMENT
control
may
be
adjusted
while
welding.
5-5.
REMOTE
CONTROL RECEPTACLE
AND
CUR
RENT
CONTROL
SWITCH
If
a
Remote Current Control
is
to
be
used,
make
connec
tions from the
control
to
the
REMOTE
CONTROL
recep
tacle
as
instructed in
Section
4-3.
When
remote
control
of
the
current
is
desired,
the
CUR
RENT
CONTROL
switch
must
be
placed
in
the
RE
MOTE
position.
Likewise,
if
a
Remote
Current
Control
is
not
desired,
the switch
must
be
in
the STANDARD
posi
tion. When
in
the
STANDARD
position,
only
the CUR
RENT
ADJUSTMENT
control
on
the
front
panel
will
con
trol
current.
When
a
Remote
Current
Control is
being
used,
the
con
trol
is
functioning
as
a
fine
current
adjustment
for the
CURRENT ADJUSTMENT
control
setting
on
the weld
ing
power
source.
For
example,
if
the
CURRENT
AD
JUSTMENT
control
on
the
welding
power
source
is
set
at
the
mid-range position,
the
Remote Current Control
will
provide (from
its
mm.
to
max.
positions)
fine
amper
age
adjustment
of
one
half
of the
welding
power
source
output
for
the
current
range
selected.
If
full
adjustment
through
use
of
the
remote
control of the
current
range
selected is
desired,
the
CURRENT ADJUSTMENT
con
trol
on
the
welding
power
source
must
be
set at
maxi
mum
position.
5-6.
REMOTE CONTROL
RECEPTACLE
AND
CON
TACTOR CONTROL
SWITCH
(FIgure
5-1)
a
WARNING:
ELECTRIC
SHOCK
can
kIll.

Do
not
touch
live
electrical
parts.

Do
not
touch
the
weld
output
terminals
when
the
contactor
is
energized.

Do
not
touch stud
welding
device and
work
clamp
at
the
same
time.
When
the
CONTACTOR
CONTROL
switch
is
in
the
STANDARD
position, open-circuit
voltage
is
present
at
the
weld
output
terminals for
as
long
as
the
welding
power
source
is
energized.
Rang.
Switch
I

I
Current
Control
Switch
/
Current
Adlustmsnt
Control
/

Power
Switch
Pilot
Light
I
I
Positive
Weld
Negativ.
Weld
Ouput
Terminal
Output
Terminal
CONTROL
OM-125
676
Page
12

IMPORTANT:
Although
the
term CONTACTOR
is
used
on
the
nameplate
and
throughout
this
manual,
the
out
put
is
not
switchedon
oroff
bya physical secondary
con
tactor;
rather,
the
output
is controlled
by
a
Silicon
Con
trolled
Rectifier
(SCR)
stack
which
functions
as
a con
tactor.
The
contactor
control
circuitry
in
this
welding
power
source
enables
the
operator
to
remotely
control the
availability
of
weld
output
from the work
station.
if
a
Remote
Contactor
Control
is
to
be
used,
make
con
nections
to
the
REMOTE
CONTROL
receptacle
as
in
structed
in
Section
4-3.
Place the
CONTACTOR
CON
TROL switch
in the
REMOTE
position. Depress
the
ON
push
button
on
the
welding
power
source.
Weld
output
will
be
available
whenever
the
Remote
Contactor
Con
trol
switch
is
closed.
If
a
Remote
Contactor
Control is
not to
be
used,
place
the
CONTACTOR
CONTROL switch
in
the
STANDARD
position.
When
in
the
STANDARD
position,
weld
output
will
be
available
after
the
ON
push
button is
depressed.
Weld
output
will
continue
until
the OFF
push
button
Is Je
pressed.
5-7.
ARC CONTROL
SWITCH
(FIgure
51)
The
ARC CONTROL
switch
provides
selection of
arc
characteristics
to
suit
individual
welding
conditions.
When the switch is
set
at
MAX.
(maximum),
current
in
creases
rapidly
as
the
short-circuit condition
is
ap
proached.
This
provides
extra current
for
arc
starting
in
out
of
position welding
as
well
as
for
certain
types
of
electrodes.
When the switch is
set at
MED.
(medium),
current
in
creases
slightly
as
the
short-circuit condition is
ap
proached.
This
provides
a
slight
increase
in
current
for
arc
starting
which is
necessary
for
certain
types
of
elec
trodes.
When
the switch is
set
at
SOFT,
current
increases
~n
a
linear fashion
as
the
short-circuit
condition
is
ap
proached.
This
provides
current
characteristics
associ
ated with
Gas
Tungsten
Arc
Welding
(GTAW).
SECTiON
6
SEQUENCE
OF OPERATION
AA
WARNING: ELECTRIC
SHOCK
can
kIll;
MOVING PARTS
can
cause
serIous
Injury;
IMPROPER
AIR
FLOW
AND
EXPOSURE TO
ENVIRONMENT
can
damage
Internal
parts.

Do
not
touch live
electrical
parts.

Keep
all
covers
and
panels
in
place
while
op
erating.
Warranty
is void
if
the
welding
power
source
is
operated
with
any
portion
of
the
outer
enclosure
removed.
ARC
RAYS, SPARKS,
AND HOT
SURFACES
can
burn
eyes
and
skIn;
NOISE
can
damage
hearing.

Wear
correct
eye,
ear,
and
body protection.
FUMES
AND
GASES
can
seriously
harm
your
health.

Ventilate
to
keep
from
breathing
fumes and
gases.

If
ventilation
is
inadequate,
use
approved
breathing
device.
HOT
METAL,
SPATrER,
AND
SLAG
can
cause
lire and burns.

Watch for fire.

Have
a
fire
extinguisher
nearby,
and
know
how
to
use
it.

Allow
work
and
equipment
to
coo! before han
dling.
MAGNETIC
FIELDS
FROM HIGH CURRENTS
can
affect
pacemaker operatIon.

Wearers
should
consult
with
their
doctor be
fore
oing
near
arc
welding, gouging,
or
spot
welding
operations.
See Section 1

Safety
Rules For
Operation
Of
Arc
Welding
Power Source
for
basic
welding
safety
information.
6-1.
STUD WELDING
1.
Install and
connect
unit
according
to
Section
4.
2.
If
a
Remote
Current
and/or
a
Remote
Contactor
Control
are
not to
be
used,
place
the
CURRENT
CONTROL
and
CONTACTOR
CONTROL
switches
in
the
STANDARD
position.
If
a
Remote
Cunent
and/or
a
Remote
Contactor
Control
are
to
be
used,
place
the
CURRENT
CONTROL
and
CONTACTOR
CONTROL
switches
in
the
REMOTE
position
(see
Sections
5-5 and
5-6).
3.
Place
the
RANGE
switch
in
the desired
position (see
Section
5-3).
4.
Place the
ARC
CONTROL
switch
in
the desired
po
sition
(see
Section
5-7).
5.
Rotate
the
CURRENT
ADJUSTMENT
control,
or
Remote
Current
Control if
used,
to
the desired
pDsi
tion
(see
Section
5-4).
IMPORTANT:
The
CURRENT
ADJUSTMENT
control
may
be
adjusted
while
welding.
6.
Prepare
and
connect
stud
welding
device
according
to
its
Owners
Manual.
OM-125
676
Page
13

7.
Wear
dry
insulating
gloves
and
clothing,
and
wear
suitable
flash-type
safety
goggles.
8.
Prepare
for
welding
as
follows:
a.
Connect
work
clamp
to
clean,
bare
metal
at
work
piece.
b.
Select
and obtain
proper
stud(s)
and
insert
into
stud
welding
device.
9.
Depress
the
POWER
switch
ON
push
button
(see
Section
5-1).
10.
Begin
welding.
6-2.
SHUTTING DOWN
1.
Stop
welding.
2.
Allow
the
welding
power
source
to
idle
forthree
min
utes
with
no
load
applied.
3.
Depress
the
POWER
switch
OFF
push
button.
SECTION
7-
MAINTENANCE
&
TROUBLESHOOTING
7-1. ROUTINE
MAINTENANCE
IMPORTANT:
Everj
six
months
inspect
the
labels
on
this
unit
for
legibility.
All
precautionary
labels
must
be
maintained
in
a
clearly
readable
state
and
replaced
when
necessary.
See Parts
List for
part
number
of
pre
cautionary
labels.
4~
WARNING:
ELECTRIC
SHOCK
can
kill.

Do
not
touch
live electrical
parts.

Shutdown
welding
powersource,
and
discon
nect
input
po
wer
employing
lookout/tagging
pro
cedures
before
inspecting, maintaining,
orserv
icing.
Lockout/tagging
procedures
consist of
pad
lockinQ
line disconnect switch
in
open
position,
removing
fuses
from
fuse
box,
or
shutting
off and
red-tagging
circuit
breaker
or
other
disconnect
ing
device.
MOVING
PARTS
can
cause
serious
Injury.

Keep
away
from
moving
parts.
HOT
SURFACES
can cause
severe
burns.

Allow
cooling
period
before
servicing.
Table
7-1.
MaIntenance
Schedule
FREQUENCY
MAINTENANCE
Every
Month
Units
in
heavy
service environ
ments:
Check
labels,
weld
cables,
clean
internal
parts.
Every
3 Months
Check
weld
cables
(Section
7-18).
Every
6
Months
Check
all
labels
(see
IMPORT
ANT
block,
Section
7-1).
Clean
internal
parts
(Section
7-iC).
*
Frequency
of
service
is
based
on
units
operated
40
hours
per
week.
Increase
frequency
of maint
enance
if
usage
exceeds 40
hours
per
week.
A.
Fan
Motor
This
unit
is
equipped
with
an
exhaust
fan
and relies
on
forced draft for
adequate cooling.
The
fan
motor
is
manufactured with lifetime sealed
bearings
and
requires
no
maintenance.
S.
Weld Cables
a
WARNING:
Read
and
follow
safety
Informa
tion
at
beginnIng
of entire
SectIon
7-1
before
proceeding.
Every
three
months
inspect
cables
for
breaks
in
insula
tion.
Repair
or
replace
cables
if
insulation
breaks
are
present.
Clean
and
tighten
connections
at
each
inspec
tion.
C.
Internal
Cleaning
a
WARNING:
Read and
follow
safety
Infomia
tlon
at
begInnIng
of
entire SectIon
7-1
before
proceeding.
Every
six
months blow
Out
or vacuum
dust
and
dirt from
the inside of the
welding
power
source.
Remove
the
outer
enclosure,
and
use
a
clean,
dry
airstream
or vac
uum
suction
for
the
cleaning operation.
If
dusty
or
dirty
conditions
are
present,
clean the
unit
monthly.
7-2.
RECTIFIER
PROTECTION
The
main rectifier
SRi
in
this
welding
power
source
is
protected
by
a
normally-closed
thermostat
TP1
wired
in
series
with
the
contactor
W
coil
circuit.
Should
overheat
ing
of
the
main
rectifier
occur,
this
thermostat
would
open
causing
the
contactor
to
drop
out
(deenergize)
thereby
suspending
all
output.
If
this
condition
occurs,
it
will
be
necessary
to
allow
a
cooling
period
before
resum
ing
operation.
7-3.
OVERLOAD
PROTECTION
a
WARNING:
ELECTRIC
SHOCK
can
kill.

Do
not
touch
live
electrical
parts.

Shutdown
welding
powersource,
and
discon
nect
input
powerenploying
locko
ut/tagging
pro
cedures before
inspecting,
maintaining,
orserv
icing.
OM-125
676
Page
14

Lockout/tagging
procedures
consist of
pad
locking
line
disconnect
switch
in
open
position,
removing
fuses
from fuse
box,
or
shutting
off
and
red-tagging
circuit breaker
or
other disconnect
ing
device.
INCORRECT
FUSE
can
damage
unit.

Use
only
replacement
fuse
of
same
size,
type,
and
rating
(see
Parts
List).
A.
Control
Circuit
Fuse
Fl
Fuse
Fl
protects
the
control
circuit from overload.
Fuse
Fl
is
located
on
the
center
battle inside the
welding
power
source.
If
fuse
Fl
opens,
the unit
will
be
com
pletely
inoperative.
To
replace
Fl,
proceed
as
follows:
1.
Remove
top
and
right
side
panel.
2.
Check
Fl,
and
replace
it
necessary.
3.
Reinstall
top
and
right
side
panel.
B.
Circuit Board
Fuses
F2
Through
F6
Fuses F2
through
F6
protect
the
circuit board
PCi.
These fuses
are
located
on
the
center
baffle inside the
welding
power
source.
If
any
one
of these
fuses
should
open,
weld
output
would
either become
very
erratic,
or
stop
completely.
To
replace
any
of
these
fuses
F2
through
F6,
proceed
as
follows:
1.
Remove
top
and
right
side
panel.
2.
Check
F2
through
F6,
and
replace
if
necessary.
3.
Reinstall
top
and
right
side
panel.
7-4.
TROUBLESHOOTING
(Table
7-2)
a
WARNING: ELECTRIC SHOCK
can
kill.

Do
not
touch
live
electrical
parts.

Shut
down unit
and disconnect
input
power
employing lockout/tagging
procedures
before
internally inspecting, maintaining,
or
servicing.
Lockout/tagging procedures
consist of
padlo
cking
line
disconnect
switch
in
open
position~,
re
moving
fuses
from
fuse
box,
or
shutting
off
and
red-tagging
circuit
breaker
or
other
disconnect.
ing
device.
MOVING PARTS
can
cause
serious
Injury.

Keep
away
from
moving
parts.
HOT SURFACES
can cause severe
burns.

Allow
cooling
period
before
servicing.
Troubleshooting
of
internal
parts
to
be
per
formed
only by
qualified
persons.
It is assumed that the unit
was
property
installed accord
ing
to
Section 4
of this
manual,
the
operator
is
familiar
with the function of
controls,
the
welding
power
source
was
working properly,
and
that the
trouble is
not
related
to
the
welding
process.
The
following
table is
designed
to
diagnose
and
provide
remedies
for
some
of
the
troub
les
that
may
develop
in
this
welding
power
source.
Use this table
in
conjunction
with
the
circuit
diagram
while
performing
troubleshooting
procedures.
lithe
trouble is
not
remedied
after
performing
these
proce
dures,
the
nearest
Factory
Authorized
Service
Station
should
be
contacted.
In
all
cases
of
equipment
malfunc
tion,
the
manufacturers
recommendations should
be
strictly
followed.
OM-125
676
Page
15

Table
7-2.
TroubleshootIng
TROUBLE
PROBABLE
CAUSE
REMEDY
Completely
inoperative.
Open
line
fuse(s).
Replace
open
line
fuse(s).
Fuse
Fl
open.
Replace
Fl.
Contactor
W.
Check
W
points
for
wear
and
replace points
if
necessary.
Poor and/or
improper
input
connections.
Refer to
Section
4-4
for
proper
input
connections.
Main
rectitier
SRI
overheating
(thermal
shutdown).
Allow the unit
to
cool
down,
and
see
Section
7-2.
Erratic
weld
output.
Poor and/or
improper
input
and/or
output
connections.
Refer
to
Sections
4-2
and
4-4
for
proper
input
and
output
connections.
Fuses
F2-F6
open.
Replace
open
fuse
(see
Section
7-3).
Electrode.
Replace
electrode.
Low
weld
output.
Open
line fuse.
Replace
open
line
fuse.
Poor
and/or
improper
input
and/or
output
connections.
Refer to
Section
4-2
and
4-4
for
proper
input
and
output
connections.
Low
line
voltage.
Correct
low
line
voltage.
Improper
use
of Remote Current
Control
in
conjunction
with
CUR-
RENT
ADJUSTMENT
control.
Refer
to
Section
5-5
for
proper
use
of
Remote
Current
Control.
No
weld
output.
Fuse
Fl
open.
Replace
Fl
(see
Section
7-3).
Fuse
F2-F6
open.
Replace
F2-F6
as
necessary
(see
Section
7-3).
OM-125
676
Page
16