Miller Electric AUTO ARC MW 4150 User manual

AUTO
ARCJ~
May
1991
FORM:OM-113
336D
Effective
With
Serial
No.
KA898403
MODEL:
AUTO
ARCfi
MW
4150
AUTO
ARCfi
MW
4200
SPW-1
OWNERS
MANUAL
IMPORTANT:
Read
and
understand the entire
contents
of
this
manual,
with
special
emphasis
on
the
safety
material
throughout
the
manual,
before
MILLER
ELECTRIC
Mfg.
Co.
AMIerGroupLld..Company
installing,
operating,
or
maintaining
this
equipment.
This
unit and these
instructions
are
for
use
only by
persons
trained
and
experienced
in
the
safe
Box
1079
Appleton,
WI
54912
USA
operation
of
welding
equipment.
Do
not
allow
untrained
persons
to
Install,
Tel.
414-734-9821
operate,
or
maintain
this unit.
Contact
your
distributor
if
you
do
not
fully
understand these
instructions.
SB-087
313D
PRINTED
IN
U.S.A.

-~
~
ONE
YEAR LIMITED
WARRANTY
EFFECTIVE: FEBRUARY
17,
1989
This
warranty
supersedes
all
previous
AUTO ARC
warranties and is exclusive with
no
other
guarantees
orwarranties
expressed
or
implied.
COVERAGE

MILLER
Electric
Mfg.
Co. warrants to
the
for
the
purchase price (less
reasonable
depreciation
based
buyer
who
purchases
this
AUTO ARC
Welder
(Welder)
for
upon
actual
use)
upon
return
of
the
goods
at
Consumers
risk
personal,
family
or
household
purposes
(Consumer)
that
this
and
expense.
MILLERs
option
of
repair
or
replacement
will
be
j
Welderwillbefreefromdefectsinmaterialandworkmanshipfor
FOB.,
Factory
at
Appleton,
WI
or
FOB.
at
a
MILLER
autho-
A
a
period
of
one
year
from
the date
of
purchase.
This
warranty
rized service
facility,
therefore,
no
compensation
for
transporta
covers
only
the
original
purchaser
of this Welder.
MILLER
Elec-
tion
costs
of
any
kind
will
be
allowed.
Upon
receipt
of
notice
of
tric does
not
authorize
any party,
including
its authorized dis-
apparentdefectorfailure,
MILLER
shall
instructtheclaimanton
tributors,
to
offer
any
other
warranty
on
behalf of MILLER Elec-
the
warranty
claim
procedures
to
be
followed.
tric.
Upon expiration
of
the
warranty
period,
MILLER
Electric
shall have
no
further
liability
related
to
the
Welder,
except
on
THIS
WARRANTY
IS OFFERED
IN
LIEU OF
ANY
OTHER
warranty
claims
made
during
the
warranty
period.
No
warranty
EXPRESS
WARRANTY;
AND,
EXCEPT
TO
THE
EXTENT
is made
by
MILLER with
respect
to
engines,
trade accessories
PROHIBITED
BY
APPLICABLE
LAW,
THE
DURATION
OF
or
other items
manufactured
by
others.
Such
engines,
trade
ac-
ALL
IMPLIED
WARRANTIES,
INCLUDING
BUT
NOT
cessories
and other items
are
sold
subject
to
the warranties
of
LIMITED
TO
THE
IMPLIED WARRANTIES OF
MERCHAN
their
respective
manufacturers,
if
any.
All
engines
are war-
TABILITYAND
FITNESS FORAPARTICULAR
PURPOSE,
IS
ranted
by
their
manufacturer
for
two
years
from
date
of
original
LIMITED
TO
THE
DURATION OF THIS
WARRANTY.
purchase,
except
Deutz
engines
which have
a one
year,
2000
hour
warranty.
ANY
EXPRESS
WARRANTY
NOT
PROVIDED
HEREIN
AND
ANY
IMPLIED
WARRANTY.
GUARANTY
OR
REPRE
MILLER shall be
required
to
honor
warranty
claims
on
war-
SENTATION
AS TO
PERFORMANCE,
AND ANY
REMEDY
ranted
Equipment
in
the
event
of failure
resulting
from
a
defect
FOR
BREACH
OF CONTRACT
WHICH,
BUT FOR THIS
within the
following
periods
from
the date of
delivery
of
Equip-
PROVISION,
MIGHT ARISE
BY
IMPLICATION,
OPERATION
ment to
the
original
user:
OF
LAW,
CUSTOM OF
TRADE
OR COURSE
OF
DEALING,
1
A
Id
d
1
INCLUDING
ANY
IMPLIED WARRANTY
OF
MERCHANT-
2
rc we
ers,
power
sources,
an
comporien
s
.
year
ABILITY
OR OF
FITNESS FOR PARTICULAR
PURPOSE,
Ibr
rnai
power
re
I
iers
years
WITH
RESPECT TO
ANY AND
ALL
EQUIPMENT
FUR
3.
AU
welding
guns,
feeder/guns
and
torches
90
days
NISHED
BY
MILLER
IS EXCLUDED
AND
DISCLAIMED
BY
4.
Replacement
or
repair
parts,
exclusive of
labor
.
60
days
LLE
5.
Batteries
6 months
. 
Some
states
do
not
allow limitations
on
how
long
an
implied
provided
that MILLER
is
notified
in
writing
within
thirty
(30)
days
warranty
lasts,
so
the above limitation
may
not
apply
to
you.
of
such
failure.
This
warranty
gives
you
specific
legal rights,
and
you may
also
have
other
rights
which
vary
from
state to state.
WHAT
IS
NOT COVERED

This
warranty
does
not
extend
to
any
Welder
subjected
to
misuse,
neglect,
accident,
or
in-
THE
PURCHASERS
REMEDIES FOR
A
DEFECTIVE
warranty
repair
by
anyone
except
MILLER
Electric
or
its autho-
WELDER,
TO
THE
EXTENT PERMITTED
BY
APPLICABLE

rized service
stations.
Further,
thiswarranty only
extends
to
the
LAW,
ARE
LIMITED
TO
THE REMEDY
PROVIDED
BY
THIS
original purchaser
of this
Welder.
WARRANTY.
TO
THE EXTENT
ENFORCEABLE
UNDER
APPLICABLE
LAW,
MILLER
ELECTRIC
SHALL
IN
NO
In
the
case
of
MILLERs
breach of
warranty
or
any
other
duty
EVENT
BE LIABLE
FOR
CONSEQUENTIAL,
INCIDENTAL
with
respect
to
the
quality
of
any
goods,
the
exclusive remedies
OR SPECIAL
DAMAGES
ARISING OUT OF
THE
USE
OF,
OR
therefore
shall
be,
at
MILLERs
option (1)
repair
or
(2) replace-
INABILITY TO
USE,
THE
WELDER,
WHETHER
BASED ON
p
ment
or,
where
authorized
in
writing
by
MILLER
in
appropriate
BREACH OF
THIS
WARRANTY,
MILLER
ELECTRICS NEG

cases,
(3)
the
reasonable
cost
of
repair
or
replacement
at
an
LIGENCE
OR
OTHER
TORT,
OR
ON
ANY
THEORY OF
authorized MILLER
service station
or
(4)
payment
of
or
credit
STRICT
LIABILITY.
-~
~

ERRATA
SHEET
After
this
manual
was
printed,
refinements
in
equipment
design
occurred. This
sheet lists
exceptions
to
data
appearing
later
in this manual.
AMENDMENT
TO SECTION
7
MAINTENANCE
&
TROUBLESHOOTING
Amend
Section
7-lA.
ROUTINE
MAINTENANCE:
Fan
Motor
This
unit
is
equipped
with
an
exhaust
fan and relies
on
forced
draft for
adequate
cooling.
The
fan
motor
needs
oiling
every
six months
using
SAE
20
oil.

OM-113
3360
5191
RECEIVING-HANDLING
Before
unpacking
equipment,
check
carton
for
any
dam- Use
the
following
spaces
to
record the
Model
Designa
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
1
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
8
3-2.
Duty
Cycle
8
3-3.
Description
8
3-4.
Supplied
Equipment
8
3-5. Additional
Required
Equipment
9
3-6.
Optional
Equipment
10
3-7.
Consumable
Parts
10
SECTION
4INSTALLATION
OR
RELOCATION
4-1.
Site Selection
10
4-2.
Transporting
Methods
10
4-3.
Running
Gear
Installation
11
4-4.
Optional
SPW-1
Panel
Installation
11
4-5.
Shielding
Gas
Installation
12
4-6.
Work
Cable
Assembly
12
4-7.
Weld
Polarity
Selection
14
4-8.
MWG-200
Welding
Gun
Connections
14
4-9.
Installation
Of
Optional
Spool
Gun
14
4-10.
Welding
Wire
Spool
Installation
16
4-11.
Hub
Tension
Adjustment
16
4-12.
Electrical
Input
Connections
16
4-13.
Welding
Wire
Threading
18

Section
No.
Page
No.
SECTION
5OPERATOR
CONTROLS
5-1.
Power Switch
And Pilot
Light
19
5-2. Thickness
Volts
Selector
19
5-3. Fine
Tuning
Wire
Speed
Control
20
5-4.
Fan-On-Demand~
20
5-5.
Optional
Spot/Pulse
Panel
Controls
20
SECTION
6
SEQUENCE
OF
OPERATION
6-1.
Gas
Metal
Arc
Welding
(GMAW)-Continuous
And
Gas
Metal
Arc
Welding-Pulsed
Arc
(GMAW-P)
21
6-2.
Gas
Metal
Arc
Welding
(GMAW)-Spot
(Models
With
Optional
SPW-1
Panel
Only)
22
6-3.
Shutting
Down
23
SECTION 7
MAINTENANCE
&
TROUBLESHOOTING
7-1.
Routine
Maintenance
24
7-2.
Replacing
Drive Roll And Wire Inlet
Guide
25
7-3. Drive
Housing Realignment
26
7-4.
Replacing
Hub
Assembly
26
7-5.
Inspecting
And
Replacing
Motor Brushes
27
7-6.
Overload
Protection
27
7-7.
Thermal
Overload
Protection
28
7-8. Printed
Circuit
Board
Replacement
28
7-9.
Troubleshooting
28
SECTION
8
ELECTRICAL DIAGRAMS
Diagram
8-1.
Circuit
Diagram
For
MW
4150
Models
30
Diagram
8-2.
Circuit
Diagram
For
MW
4200
Models
31
Diagram
8-3.
Circuit
Diagram
For
SPW-1
Panel
31
Diagram
8-4.
Wiring Diagram
For
SPW-1 Panel
32
Diagram
8-5.
Circuit
Diagram
For
SPW-1 Panel
Dual
Timer/Pulser
Board
PC5O
33
SECTION
9
WELDING TECHNIQUES
&
TROUBLESHOOTING
9-1.
Gas
Metal
Arc
Welding
(GMAW)

Continuous
Seam
34
9-2.
Gas
Metal
Arc
Welding
(GMAW)-Pulsed
35
9-3.
Gas
Metal Arc
Welding
(GMAW)-Spot
36
9-4.
Plug
Welds
37
9-5.
Skip
Welding
37
9-6.
Troubleshooting
The
Gas
Metal
Arc
Welding
Process
37
SECTION
10
AUTO BODY
REPAIR
APPLICATION
10-1.
Pointers For
Welding
Auto
Body
Sheet Metal
40
10-2.
Procedure
For
Welding
Mild
Steels
40
10-3.
Procedures For
Welding
Door
Panels
40
10-4.
How To
Prevent
Glass
Breakage
And
Spatter
On
Windows
41
10-5.
Procedures For
Welding
Fenders
And
Quarter
Panels
41
10-6.
Welding
Frames
And
High
Strength
(HSS)
Steels
41

Section
No.
Page
No.
SECTION
11

PARTS LIST
Figure
11-1.
Main
Assembly
42
Figure
11-2.
Baffle,
Air
w/Components 44
Figure
11-3. Drive
Assembly,
Wire
46
Figure
11-4.
Panel,
Rear
w/Components
47
Figure
11-5.
Panel,
Front
w/Components
48
Figure
11-6.
SPW
1
Spot
Panel
(Optional)
50
Figure
11-7.
Circuit
Card,
Dual
Timer/Pulser
P050
51
Figure
11-8.
Running
Gear
52
LIST OF
CHARTS
AND
TABLES
Table
3-1.
Specifications
7
Chart
3-1.
Volt-Ampere
Curves
7
Chart
3-2.
Duty
Cycle
7
Table 4-1.
Input
Conductor
And
Fuse
Size
17
Table
6-1.
Suggested
Parameters
For
Continuous
Gas
Metal
Arc
Welding
(GMAW) 22
Table
6-2.
Checking
Weld
Parameters
23
Table
7-1.
Maintenance
Schedule
24
Table
7-2.
Troubleshooting
29

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
Difterent
arc
welding
processes,
electrode
alloys,
and
fluxes
can
produce
difterent
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
cuffless
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
va
pors
to
form
phosgene.
DO NOT
WELD
or
cut
where sol
vent
vapors
can
be
drawn
into the
welding
or
cutting
at
mosphere
or
where the radiant
energy
can
penetrate
to
OM-113
336
Page
1

atmospheres
containing
even
minute
amounts
of
trichloroethylene
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
wall
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 after weld
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
or
visible)
in
floors
or
walls
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
approval
that
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
or
caustic
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 regulator
from 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-113
336
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.
Stuck
valve. Do NOT
use
a
hammer
or
wrench
to
open
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.
Cylinder
fittings
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 off
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
or
worn
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
orifices 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.
NEVER
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
and
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
Liq
uid*
or
equivalent
per
gallon
of
water).
Bubbles indicate
leak.
Clean
off
soapy
water
after
test;
dried
soap
is
com
bustible.
E.
User
Responsibilities
Remove
leaky
or
defective
equipment
from
service
im
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-113
336
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,
weidments
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
leather
jacket
or
sleeves,
flame-proof
apron,
and
fire-resistant
leggings.
Avoid
outer
garments
of
untreated
cotton.
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
filter
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
burns.
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
rup
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,
work
benches,
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
culator
to
the
building
ground.
Conductors
must
be ade
quate
to
carry
ground
currents
safely.
Equipment
made
OM-113
336
Page
4

6.
ANSI
Standard
Z49.2,
FIRE
PREVENTION
IN
THE
USE OF CUTTING
AND
WELDING
PROC
ESSES
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
Society,
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
Protec
tion
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
from
the
Compressed
Gas
Association,
1235
Jef
ferson
Davis
Highway,
Suite
501,
Arlington,
VA
22202.
12.
CSA Standard
W117.2,
CODE
FOR SAFETY
IN
WELDING
AND
CUTTING
obtainable from
the
Canadian Standards
Association,
Standards
Sales,
178
Rexdale
Boulevard,
Rexdale,
Ontario,
Canada
M9W
1
R3.
13.
NWSA
booklet,
WELDING
SAFETY
BIBLIOG
RAPHY
obtainable
from
the
National
Welding
Supply
Association,
1900
Arch
Street,
Philadel
phia,
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 NW.
LeJeune
Rd, Miami,
FL
33126.
15.
ANSI Standard
Z88.2,
PRACTICE
FOR
RESPI
RATORY
PROTECTION,
obtainable
from
the
American 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
WARNING
statements
identify
procedures
or
practices
which
must
be
followed to
avoid seri
ous
personal injury
or
loss of
life.
a
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-113
336
Page
6

electrically
HOT
by
stray
current
may
shock,
possibly
fa
tally.
Do
NOT
GROUND
to
electrical
conduit,
or
to
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.
If
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
off
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 circuit 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
HOT
when
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
Rd,
Miami,
FL
33126.
2.
NIOSH,
SAFETY
AND
HEALTH
IN
ARC
WELD
ING
AND
GAS WELDING
AND
CUTTING
ob
tainable
from
the
Superintendent
of
Documents,
U.S. Government
Printing
Office,
Washington,
D.C.
20402.
3.
OSHA,
SAFETY
AND HEALTH
STANDARDS,
29CFR
1910,
obtainable
from
the
Superinten
dent
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
Ameri
can
National
Standards
Institute,
1430
Broad
way,
New
York,
NY
10018.
5.
ANSI Standard
Z41
.1,
STANDARD
FOR
MENS
SAFETY-TOE
FOOTWEAR
obtainable
from
the
American
National
Standards
Institute,
1430
Broadway,
New
York,
NY
10018.
OM-113
336
Page
5

SECTION
3
SPECIFICATIONS
Table
3-1.
SpecificatIons
Rated
~
Duty
Cycle
M
Ci~cuit
Input
At
Rated
Load
Output
60 Hz
Single-Phase
kw
Control
Circuit
Voltage
At
Gun
Electrode
Wire
Feed
Speed
Electrode
Wire
Diameter
Capability
Amperes
At
230V
460V
kva
e
Voltag
200V
575V
150
Amperes
At
23
Volts
DC
32
26.5 24
12
9.6
5.5
4.8
24
Volts
DC
60to486
ipm
(1.5
to
12.3
mpm)
.023/.025
in.
(0.6
mm)
.030
in.
(0.8
mm)
.035
in.
(0.9
mm)
Dimensions
Weight
A:
Width
13-1/2
in.
Net
Ship
(343
mm)
B:
Length
27
in.
(686
mm)
205
lbs.*
215
lbs.~
C:
Height
(93
kg)
(98
kg)
30
in.
(762
mm)
*Add
2-3/4
lbs.
(1.25
kg)
for units with
spot
~Add
5
lbs.
(2.27
kg)
for
units with
spot
panel.
Figure
3-1.
Overall
Dimensions
Chart
3-1.
Volt-Ampere
Curves
Chart
3-2.
Duty
Cycle
RATED
OUTPUT,
6 I~I3H
5
4
3
2
1LOW
100
.
~
- -
-
 
 -
  -


 
-~
30
40 60
60
70 60
90100
Z
DUTY CYCLE
SB-I
46 687
0
>
C)
0
200
160
Cl)
w
w
0.
0
-J
w
SB.146
888
OM-113
336
Page
7

3-1.
VOLT-AMPERE
CURVES
(Chart
3-1)
3-3.
DESCRIPTION
(~3*
RATED
OUTPUT
The
volt-ampere
curves
show the
voltage
and
amper
age
output
capabilities
of
the
unit.
Voltage
and
amper
age
adjustment
is
provided
by
the
FINE
TUNING
WIRE
SPEED
control.
Curves of
other
setting
fall
between
the
curves
shown.
With
the
use
of
the
volt-ampere
curves,
it is
possible
to
determine
the weld
amperage
at
any
particular
load
volt-
age.
3-2.
DUTY
CYCLE
(Chart
3-2)
The
duty
cycle
is the
percentage
of
a
ten
minute
period
that
a
welding
power
source can
be
operated
at
a
given
output
without
overheating
and
damaging
the
unit.
This
welding
power
source
is rated
at
60
percent
duty cycle
when
operated
at
150
amperes.
The
unit
can
be
oper
ated
at
150
amperes
for
six
consecutive
minutes,
but
it
must
operate
at
no
load
for
the
remaining
four
minutes
to
allow
proper
cooling.
If
the
welding
amperes
decrease,
the
duty
cycle
increases.
Refer
to
the
Duty
Cycle
chart
(Chart
3-2)
to
determine
the
output
of the
welding
power
source
at
various
duty
cycles.
a
CAUTION:
EXCEEDING
DUTY
CYCLE
RATINGS
will
damage
the
welding
power
source.

Do
not
exceed
indicated
duty cycles.
This
unit
is
a
single-phase
constant
voltage
dc
arc
weld
ing
power
source
and
wire feeder
system.
This
unit
is de
signed
for
Gas
Metal
Arc
Welding
(GMAW)
with
short
circuit
or
spray
transfer. It
is
designed primarily
for
use as
a
dc Electrode
Positive/Reverse
Polarity
machine.
Rated weld
output
is
150
amperes,
23 volts
dc,
at
60%
duty
cycle.
Models
with the
optional
SPOT/PULSE
WELD
PANEL
provide
the
controls
for
regulating
spot
weld
time/pulse
on
time,
burnback
time,
and
pulse
off
time.
3-4.
SUPPLIED
EQUIPMENT
(Figure
3-2)
The
following
equipment
is
supplied
with
the
welding
power
source
and
requires
customer
installation
or as
sembly:
A.
Running
gear
with
gas
cylinder
rack
and
bracket.
B.
Wall
receptacle
(200/230
volt
models
only).
C. Work
cable,
work
clamp,
and
jack
plug.
D.
MWG-200
gun
with
5/8
in.
(16 mm)
nozzle and
two
contact
tubes for
each wire size.
E. Drive rolls
for
.023/.025,
.030,
and
.035 in.
(0.6,
0.8,
and 0.9
mm)
hard wire.
The
welding
power
source
is
factory
equipped
with
9 ft.
(2.7 m)
power
cord
(with
plug
on
200/230
volt
models),
gas
valve,
and
facilities
for
a
Spool
gun.
Spreader
Bar
Figure
3-2.
Supplied
Equipment
Wall
Bracket
Receptacle
OM-113
336
Page
8

3-5.
ADDITIONAL
REQUIRED
EQUIPMENT
(Fig
ure
3-3)
The
additional
equipment
required
to
complete
the
Gas
Metal
Arc
Welding (GMAW)
setup
can
be obtained
from
your
local
welding
supplies
distributor.
A.
Gas
Cylinder
Two
types
of
gas
are
generally
used with
Gas
Metal Arc
Welding
(GMAW)
of
thin
gauge
sheet
steel.
Carbon
dioxide
(002)
is
the
gas
recommended
for
use
with this
welding
power
source/gun
combination.
A
mixture of
75
percent
argon
and 25
percent
carbon
dioxide
also
gives
favorable
results.
Obtain
a
cylinder
of
selected
shielding
gas
from
your
supplier.
B.
Regulator/Flowmeter
Regulator/flowmeters
provide
a
constant
shielding
gas
pressure
and
flow
rate
during
the
welding
process.
Be
cause
gases
have different
properties,
each
regulator!
flowmeter
is
designed
to
be used with
a
specific
gas
or
mixture of
gases.
Regulator/flowmeters
cannot
be
changed
from
one
gas
to
another
unless
the
proper
adapters
are
installed.
Obtain
the
proper
regulator/flow-
meter
for
the
type
of
gas
used.
Gas
Hose
Safety
Regulator/Flowmeter
Glasses
Figure
3-3.
Additional
Required
Equipment
C. Gas
Hose
Measure distance
from gas
cylinder
to
welding
power
source.
Obtain
good quality
5/8
in.
(16
mm)
outside di
ameter,
S.A.E.
gas
hose,
and install
5/8-18
right-hand
thread
fittings
on
both ends
of
hose.
D.
Wire
Spool
For
GMAW
Process
Selection
of
the
correct
welding
wire is
important
in
Gas
Metal Arc
Welding
(GMAW).
There
are
many
types
to
choose
from,
but
certain wires
are
best
suited for
weld
ing
thin
gauge
sheet
steel.
The
American
Welding
Soci
ety
(AWS)
classification
for GMAW
wires is
usually
indi
cated
on
the label
of
the wire
spool.
Two AWS
wire
classes recommended
are
E7OS-6
and
E705-3.
The
E7OS-6
provides
a more
fluid
(wetter)
weld
puddle
and
a
flatter bead
than
E7OS-3. Obtain
a
spool
of
selected
wire.
E.
Personal
Safety
Equipment
When
using
this
welding
power
source,
wear a
welding
helmet,
fitted
with
the
proper
filter
lens,
to
protect
the
eyes
from
the
welding
arc.
Also
wear
protective
clothing,
safety
glasses,
and
gloves
to
prevent
injury.
F.
Offset/Punching
Tool
(Figure
3-4)
The
repair
of
automotive sheet
steel
is easier
when
an
OffsetlPunching
tool is used. This
tool
has
a
dual
pur.
pose,
rotating
head.
The
damaged
area
is
cutaway
and the
jaws
of
the
offset
portion
of
the
head
are
placed
over
the
sheet
steel.
When
pressure
is
applied
to
the
handles,
the tool
indents
a
small
offset
in
the sheet steel.
A
new
piece of
sheet
steel,
cut to
size,
is
placed
in
position
to
overlap
the off
set
portion.
The
new
piece
of
sheet
steel is
welded into
place,
sanded,
filled with
body
putty,
and
finish
sanded.
The head
of
the tool
can
be rotated
one-half
turn
to
be
used
as a
punching
tool. The
punching
tool
expedites
riveting
operations.
The
use
of
this tool
will
keep
material
use
and
finishing
time
to
a
minimum.
Figure
3-4.
Offset/Punching
Tool

Gas
Cylinder
Helmet
Wire
Spool
Gloves
Li.
/
1.
I
OM-113
336
Page
9

3-6.
OPTIONAL
EQUIPMENT
3-7.
CONSUMABLE
PARTS
The
following
equipment
can
be
obtained
to
extend
the
capabilities
of the
basic unit
or
to
suit
special
applica
tions:
A.
SPW-1,
Spot,
Pulse,
Continuous
Panel
(in
cludes
three
spot
nozzles) (for
installation
see
Section
4-4)
Spool
gun
Gun
cable holder
D.
25
ft.
(7.6 m)
power
cord
extension.
The
following
parts
are
subject
to
wear
or
damage
in
nor
mal
use:
SECTION
4 INSTALLATION OR
RELOCATION
4-1.
SITE
SELECTION
(Figure
4-1)
Figure
4-1.
Location
Select
an
installation
site which
provides
the
following:
1.
Correct
input
power
supply (see
unit
nameplate)
2.
Shielding
gas
supply
3.
Adequate
ventilation and fresh
air
supply
4.
No
flammables
5.
A
clean and
dry
area
6.
Proper
temperature
that avoids
extremes
of
heat
or
cold
7.
Proper
airflow
around
unit
8.
Adequate
space
for
opening
side
access
doors
for
installation,
maintenance,
and
repair
func
tions.
Base
mounting
holes
provide
the
capability
to
install and
secure
the
unit
on a
running
gear
or
in
a
permanent
location.
a
WARNING:
FIRE
OR EXPLOSION
can
result
from
placing
unit
on or over
combustible
surfaces;
RESTRICTED
AIRFLOW
can
cause
overheating
and
possible
damage
to
internal
parts.

Do
not
locate
unit
overcombustible
surfaces.

Maintain
at
least
18
inches
(457
mm)
of
unrestricted
space
on
all
sides of
unit,
and
keep
underside
free of
obstructions.

Do
not
place
any
filtering
device
over
the
in
take
air
passages
that
provide
airflow
for
cooling
this unit.
Warranty
is
void
if
any
type
of
filtering
device
is
used
at
intake air
passages.
4-2.
TRANSPORTING
METHODS
This
welding
power
source
is
equipped
with
a
lifting
eye
for
moving
the
unit
during
installation.
Weight
capacity
of
the
lifting
eye
only
allows for
supporting
the
welding
power
source.
4~
WARNING: ELECTRIC
SHOCK
can
kill.
~.
Do
not
touch
live electrical
parts.

Disconnect
input
power
conductors from
deenergized
supply
line BEFORE
moving
welding
power
source.
FALLING
EQUIPMENT
can
cause
serious
personal injury
and
equipment
damage.

Use
lifting
eye
to
lift
unit
only,
NOT
running
gear,
gas
cylinders,
or
any
other
heavy
accessories
or
devices.

Use
equipment
of
adequate
capacity
to
lift
the
unit.

If
lifting
or
moving
this
unit
with lift
forks
under
the
base,
be
sure
that
lift
forks
are
long
enough
to
extendbeyond
opposite
side
of
the
base.
Using
lift
forks
too
short
can
damage
internal
parts
if
tips
of
the
lift
forks
penetrate
the
unit
base,
or
may
cause
personal
injury
and/or
equipment
damage
if unit
falls
off
the
lift
forks.
B.
C.
A.
Contact
tubes
B. Nozzles
C. Gun
liner
D.
Drive rolls.
SB-087
313-0
OM-113
336
Page
10

4-3.
RUNNING
GEAR
INSTALLATION
(Figure
4-2)
a
WARNING:
UNCONTROLLED
TILTING
OR
TIPPING
of
unit
can
result
in
personal
injury
or
equipment
damage.

Use
equipment
of
adequate capacity
to
lift
the
unit.

If
using
lift
forks
to
handle
this
unit,
be
sure
the
lift
forks
are
long
enough
to
extend
out
of
the
opposite
side
of
the
base.

Do
not
place
any
part
of
the
body
under
the
unit
while it
is
suspended.
Place
blocks
under
frame
of
unit
before
installing
running
gear.
1.
Install
the
two
4
in.
(102
mm)
casters
and
spread
er
bar
onto
the front
corners
of the
welding
power
source
base
a
shown
in
Figure
4-2
using
3/8
in.
hardware.
2.
Blockthe
unit
up securely
in
middleto
ease
instal
lation
of
rear
wheel/gas cylinder
rack
assembly.
3.
Slide
axle
through
cylinder
rack,
and
install
a
wheel
on
each
end
of
axle
with
a
3/4
in.
flat
wash
er
on
each side
of wheel.
4.
Secure
wheels
in
place
with
supplied
retaining
rings.
5.
Install
cylinder
rack
onto
welding
power
source
base
using
5/16-18 x
3/4
cap
screws
and
asso
ciated hardware
(see
Figure
4-2).
6.
Remove
the
two
front
cap
screws
in
top
of
welding
power
source
wrapper
and
discard.
Install
run
ning
gear
handle
onto
wrapper
using
1/4-20
x
3/4
cap
screws as
shown
in
Figure
4-2.
7.
Install
cylinder
bracket
onto
rear
panel
of
welding
power
source as
shown
in
Figure
4-2
using
1/4-20
x
3/4
cap
screws
and
existing
holes
in
rear
panel.
8.
Install
safety
chain
onto
cylinder
bracket.
4-4.
OPTIONAL
SPW-1
PANEL
INSTALLATION
(Figure
4-3)
a
WARNING: ELECTRIC SHOCK
can
kill.

Do
not
touch live
electrical
parts.

Shut
down
welding
power
source,
and
dis
connect
input
power employing
lockout/tag
ging
procedures
before
inspecting
or
install.
ing.
Lockout/tagging
procedures
consist of
remov
ing
input
power
plug
from
receptacle,
pad
locking
line
disconnect
switch
in
open
position,
removing
fuses from fuse
box,
or
shutting
off
and
red-tagging
circuit breaker
or
other
discon
necting
device.
.wheel
SC-049
808-E
Figure
4-2.
Running
Gear Installation
Cylinder
Safety
chain
Flat
Washers
Nut
Cylinder
Rack
Axle
Spreader
Bar
Washer
Casters
Nut
Cap
Screw
Flat
Washers
OM-113
336
Page
11

IMPORTANT: SPW-
1
Spot
Panel
will
not
provide
spot
capabilities
for
the
Spool
gun.
Retain
all
hardware
re
moved
during
this
procedure
for
reinstallation.
All
direc
tions,
such
as
left
or
right,
are
with
respect
to
the
opera-
for
facing
the
front
panel.
1.
Remove
module
cover
plate
from
upper
right-
hand
corner
of
front
panel.
2.
Locate
wiring
harness
clamped
to
air baffle. Re
move
wiring
harness
from
first
clamp
and
careful
ly
pull
end
of
wiring
harness
with
connectors
through opening
in
front
panel

it
will
come
through
approximately
2
in.
(51
mm).
3. Disconnect
jumpered
connector
from
plug
PLG2.
4. Connect
receptacle
RC55 from SPW-1
panel
to
PLG2.
Be
sure
the
connectors
are
locked
togeth
er
(see
Figure
4-3).
5.
Install
SPW-1
panel
into
upper
right
corner
of
front
panel,
and
secure
using
screws
removed
in
Step
1.
a
WARNING:
PRESSURIZED CYLINDERS
can
rupture
causing
serious
personal
injury
and
loss
of
life;
FALLING CYLINDERS
can cause
serious
injury
and
equipment damage.

Keep
cylinders
away
from
welding
or
other
electrical
circuits.

Never
allow
a
welding
electrode
to
touch
any
cylinder.

Always
fasten
cylinder
securely
to
running
gear
bracket,
a
wall,
or
other
stationary
sup
port.
B.
Regulator/Flowmeter
(Customer
Supplied)
(Fig
ure
4-4)
1.
With
the
cylinder
correctly
installed,
remove
cylin
der
cap
(see
Figure
4-4).
Stand
to
one
side of the
cylinder
valve,
and
open
the valve
slightly.
When
gas
flows
from
cylinder,
close
valve. This
proce
dure
gets
rid
of
any
dust
or
dirt that
may
have
ac
cumulated
around the valve
seat.
2.
The
regulator/flowmeter
must
be
properly
equipped
with
a
stem,
nut
connectors,
and
gasket
for
use
with
either
CO2
cylinders
or
Argon/CO2
cylinders.
IMPORTANT:
A
gasket
should be installed
to
prevent
leaks. Do
not
use
lubricants
or
sealing
agents.
3.
Install
gas
regulator
onto
gas
cylinder
valve;
keep
the
face
of
the
regulator/flowmeter
gauge
in
the
vertical
position,
and
tighten
stem
nut
securely
onto
gas
cylinder.
4.
A
shielding
gas
output
fitting
is
provided
at
the
rear
of
the
welding
power
source
for
making
gas
connections.
Attach
one
end
of
the
gas
hose
to
this
output
fitting.
Attach other end
of
the
gas
hose
to
the
regulator/f
lowmeter.
4-6.
WORK
CABLE
ASSEMBLY
A
10
ft.
(3 m)
cable
with
a
lug
attached
to
one
end is
supplied
with the
unit.
To install the work
clamp
and
jack
plug
onto
the
cable,
proceed
as
follows:
A.
Work
Clamp
Installation
(Figure
4-5)
FIgure
4-3.
SPW-1
Panel
Installation
4-5.
SHIELDING GAS
INSTALLATION
A.
Gas
Cylinder
(Customer Supplied)
(Figure
3-3)
Secure
gas
cylinder
to
running
gear
using
safety
chain
on
cylinder
bracket.
If
the
running
gear
is
not to
be
used,
chain
cylinder
to
wall
or
other
stationary
support
to
pre
vent
the
cylinder
from
falling
over
and
breaking
off
the
valve.
1.
Insert
the
end
of
the work cable
with
the terminal
lug
on
it
through
one
of
two
supplied
insulating
sleeves.
2.
Lay
the
work
cable inside
the handle
of
the
work
clamp
which
has the
flattest
inner
surface.
3.
Align
the
smaller
hole
in
the
work
clamp
handle
with
the hole
in
the
work cable
terminal
lug.
Se
cure
the
terminal
lug
to
the work
clamp
with
the
supplied
nut
and bolt.
4. Bend
the tabs
on
the
end
of the
work
clamp
han
dle
around the
work
cable.
5.
Slide
the
insulating
sleeve
on
the
work
cable
over
the
work
clamp
handle.
Plug
_....~
PLG2
Receptacle
RC55
SPw-1
._~
Spot
Panel
OM-113
336
Page
12