Miller Electric AUTO ARC QUICK CUT 5000 User manual

AUTO
ARC)~
January
1989
FORM:OM.143
527
Effe
ctlve
Wit ii
Seria
No. JJ5I
8269
MODEL: QUICK
CUTTM
5000
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.
A
Miller
Group
Ltd.,
Company
installing, operating,
or
maintaining
this
equipment.
This unit and
these
instructions
are
for
use
only
by
persons
trained and
experienced
in the
safe
P0
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.
TC-125
647
PRINTED
IN
U.S.A.

ERRATA
SHEET
After
this
manual
was
printed,
refinements
In
equipment
design
occurred.
This
sheet
lists
exceptions
to
data
appearing
later
In
this
manual.
Add
the
following
CAUTION at
the
beginning
ot
Sections
2-4
and
3-2,
and
also
before
Step
2
of
Section
5-1.
CAUTION:
INCORRECT
PLASMA
GAS
can
cause
torch and
power
source
damage.
A~

Use
only
air
or
nitrogen
for
the
plasma
gas
supply.

Do not
use
any
other
gas
or
combination
of
gases.
AMENDMENT
TO
SECTION
2
-
INTRODUCTION
Amend
Table
2-1.
Specifications
Table
2-1.
SpecifIcations
Rated
Output
At
40%
Duty
Cycle
30
Amperes
At
120
Volts
DC
Maximum
Open-
~
370
Volts
DC
input
At
Rated
Load
Output
50/60
HZ
Sin~–hase
Plasma
Gas
Air
Or
Nitrogen
Onl~
Weight
Amperes
At
115V
I
230V
I
38 33
KVA
7.6
KW
4.6
Flow/Pressure
2.8
CFM
(79
L/min.)
At
50
PSI
(345
kPa)
Net
52 lbs.
(24
kg)
Ship
56
lbs.
(25
kg)
Add
Section
2-5.
Cutting
Speed
(Chart
2-1)
The
cutting
speed
chart
enables
the
operator
to
determine
the
maximum
cutting
speed
for various thickness
of
mrld
steel
within
the
capabilities
of the
power
source.
The
curve
indicates
the
proper
speeds
at
which
cutting
may
be
dcne.
although
the
speeds
indicated
may
not be achieved
instantaneously.
Cutting
may
have
to
begin
at
a
slower
speed
w~trt
an
increase
in
speed
until
the
optimum
speed
is
reached.
Cutting
at
speeds
above the
proper
speeds
shown
by
the
curve
will
cause
rapid
erosion
of
the
tip
and electrode
and
should be
avoided.

Do not
exceed
indicated
cutting speeds.
CAUTION:
EXCEEDING RECOMMENDED
CUTTING
SPEEDS
will
cause
rapid
erosion of
the
tip
and
electrode.
Add
Chart 2-1.
Cutting
Speed
Chart
2-1.
CuttIng Speed
z
z
z
d
LU
0,
0
30
(0.8)
3/8
.I0(2.~1
.20(~.I)
.30(7.61 .i.0(I0.2)
PLATE
THIC~(NESS.
IN.
(MM)
90
(2.31
80
(1.5)
I,
I
I
I
20 12
3/18
1/4
(CAGe)
I
~
ll~
~
SB.lr
~

AMENDMENT
TO
SECTION
6-
MAINTENANCE
&
TROUBLESHOOTING
Amend
Section
6-5C.
OVERLOAD
PROTECTION: Air
Pressure Switch
C.
Air
Pressure
Switch
To
prevent
damage
to
the
torch
due
to
insufficient
air
pressure,
this
unit is
protected by
air
pressure
switch
S5
located
in
the
air
pressure/regulator.
Should
air
pressure
drop
below
a
preset
value,
S5
would
close,
the
READY
light
would
turn
ott,
and
the unit
would be
completely
inoperative.
Should
the
READY
light
be
turned
on,
check
airfilterlregulator
and
air
compressor
(see
Table
6-2.
Troubleshooting).
Add
Section
6-9.
SHIELD
CUP
DETECTOR
PIN
INSPECTION
a
WARNING:
ELECTRIC
SHOCK
can
kill.

Do
not
touch
live electrical
parts.

Turn
of
f
power
source,
and
remove
input
power plug
from
receptacle
before
inspecting, maintaining.
or
servicing.
HOT
SURFACES
can
cause
severe
burns.

Allow
cooling
period
before
servicing.
Each
time the
shield
cup
is
removed
from
the
torch,
check that
the shield
cup
detector
pins
move
freely.
If
there
is
diii
around
the
pins,
clean
pins
with
electrical
contact
cleaner,
and
recheck
lorfree movement,
lilt
becomes
necessary
to
replace
the
torch
body
or
pin
assembly,
contact
the
nearest
Factory
Authorized
Service Station.
AMENDMENT
TO
SECTION
7- ELECTRICAL
DIAGRAMS
Amend
Diagram
7-1.
Circuit
Diagram
(see
Page
3
on
this Errata
Sheet)
Add
Diagram
7-2.
Circuit
Diagram
For Driver
Board
PC2
(see
Page
4
on
this
Errata
Sheet)
Add
Diagram
7-3.
Circuit
Diagram
For
Transformer
Control
Board
PC3
(see
Page
5
on
this
Errata
Sheet)
Add
Diagram
7-4.
Circuit
Diagram
For
Filter
Board PC4
(see
Page
5
on
this
Errata
Sheet)
Add
Diagram
7-5. Circuit
Diagram
For
High
Frequency
Board PC5
(see
Page
6
on
this
Errata
Sheet)
AMENDMENT
TO
SECTION
9-
PARTS LIST
Amend
Parts
List
as
follows:
Dia.
Part
Replaced
Mkgs
No.
With
Description
OU3r~V
25-31
125 125
Deleted
Item
not
available
as an
assembly
25-35
125
126
Deleted
Item
not available
as
an
assembly
25-36
125
114
Deleted
Item
not
available
as
an
assembly
25-38
125
123
Deleted
Item
not available
as
an
assembly
25-39
125
121
Deleted
Item not
available
as an
assembly
25-
125
030
126
797
TORCH.
APT-3000
27-1
iT
125 175
125
175
TERMINAL,
(addeddiamkg)
.
27-3 Torch
125
056 125 056 FITTING.
(added
dia
mkg)
27-13
Work
125181 125181
TERMINAL,(addeddiamkg)
31-4
125
068
130
286
TORCH
BODY,
(consisting
of)
(Eff
w/JK634462)
130 285 DETECTIVE
PIN
KIT,
(consisting
of)
130 031 INSULATING COVER
130032
SCREW
First
digit
represents
page
no
-
digits
following
dash
represent
item
no.
BE
SURE
TO
PROVIDE
MODEL
AND
SERIAL
NUMBER WHEN
ORDERING
REPLACEMENT
PARTS
OM-296
Page
2

Circuit
Diagram
No.
SC125
063-B
~
i~i~
PS
TMI
~
ii
A
~
~
~
!f!
!
~
~11D~

-.0
9
PS

,
IT
Diagram
7-1.
Circuit
Diagram

0
-o
lQ
Circuit
Diagram
No.
SC-i
29
644
DIagram
7-2.
Circuit
Diagram
For
Driver
Board
PC2

CN2
-3
CN9-
I
CN3
-3
CN4
-3
CN5-3
CN2-
I
CN3-
I
CN4-
I
CN5-
I
CN6
-3
CNI
-f
CNI -3
CN8-
I
CN8-2
CN7-
I
CN7-3
CN6-
I
Circuit
Diagram
No.
SA-1
29 636
Diagram
7-3.
CircuIt
Diagram
For Power
Distribution
Board
PC3
3<
Ri
>2
C2 L2
C3
Cl
4
CN
I
CNS
3
CN3
7
5
3
Circuit
Diagram
No.
SA-129
638
L7
L8
Diagram
7-4.
CircuIt
Diagram
For
Filter
Board
PC4
OM
Y~...
~e
5

4
1B2
Circuit
Diagram
No. SA1
29
639
DIagram
7-5.
CircuIt
Diagram
For
High
Frequency
Board
PC5
ct4I
3
c~ C6
EI(
OTB?
OM-296
Page
6

TABLE
OF
CONTENTS
Section
No.
Page
No.
SECTION
1
-
SAFETY RULES
1-1.
Introduction
1
1-2.
General
Precautions
1
1-3.
Arc
Welding
4
1-4.
Standards
Booklet
Index
5
SECTION
2-INTRODUCTION
2-1.
Duty
Cycle
7
2-2.
General
Information
And
Safety
7
2-3.
Receiving-Handling
8
2-4.
Description
8
SECTION
3INSTALLATION
3-1.
Location
8
3-2.
Air
Filter/Regulator
Installation
And
Connections
8
3-3.
Input
Voltage
Changeover
Switch
9
3-4.
Electrical
Input
Connections
9
SECTION
4-
OPERATOR
CONTROLS
4-1.
Power
Switch/Breaker
And
Power On
Light
11
4-2.
Ready
Light
11
4-3.
Metal
Switch
11
4-4.
Thickness Control
11
4-5.
Gas/Air
Switch
11
4-6.
Trigger
Hold
Switch
11
SECTION
5-
SEQUENCE OF OPERATION
5-1.
Plasma
Arc
Cutting
(PAC)
12
5-2.
Cutting
Problems And
Recommendations
13
5-3.
Shutting
Down
13
SECTION
6-
MAINTENANCE &
TROUBLESHOOTING
6-1.
Routine
Maintenance
13
6-2.
Shield
Cup.
Tip,
And
Electrode
Inspection
And
Replacement
14
6-3.
Torch
And
Work Lead
Inspection
And
Connections
15
6-4.
Spark
Gap
16
6-5.
Overload
Protection
16
6-6.
Safety
Shutdown Devices
16
6-7. Circuit
Board
Handling
Precautions
17
6-8.
Troubleshooting
17
SECTION
7-
ELECTRICAL
DIAGRAMS
Diagram
7-1.
Circuit
Diagram
19

Figure
9-1.
Main
Assembly
.
Figure
9-2.
Capacitor
Assembly
Figure
9-3.
Terminal
Assembly,
Output
Figure
9-4.
Front
Panel
Assembly
Figure
9-5.
Pilot
Unit
Figure
9-6.
Rectifier
Assembly
Figure
9-7.
Torch,
Model
APT-3000
24262728
29
30
31
Table
2-1.
Specifications
Table
6-1.
Maintenance
Schedule
Table
6-2.
Troubleshooting
Section
No.
SECTION
8-
PLASMA
ARC
CUTTING
(PAC)
INSTALLATION GUIDELINES
8-1.
General
8-2.
Definitions
8-3.
High-Frequency
Radiation
8-4.
Location
8-5.
General
Installation Procedures
8-6.
Guidelines
For
Installation Of
Plasma
Arc
Cutting
(PAC)
Power
Sources
8-7.
Installation Guidelines
Checklist
SECTION
9
PARTS
LIST
Page
No.
20
20
21
21
21
22
23
LIST
OF CHARTS AND
TABLES
7
13
18

SECTION 1

SAFETY RULES
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
others
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
manufacturers
Material
Safety
Data
Sheets
(MSDSs)
for
specific
technical
data
and
precautIon
ary
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
cuffiess
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 im
mediate
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
Stan
dard
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
re
moved
from
the
work
surface,
the
area
is well
ventilated
and,
if
necessary,
while
wearing
an
air-supplied
respira
tor.
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
tnchloroethylene
and
perchioroethylene
vapors
to
form
phosgene.
DO
NOT WELD
or
cut
where
solvent
vapors
can
be
drawn into
the
welding
or
cutting
OM-296
Page
1

atmosphere
or
where the
radiant
energy
can
penetrate
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
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
fators.
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 afterweid
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
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
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.
Watertilling
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.
Neverweld
orcut
where the
air
may
contain
flammable
dust,
gas,
or
liquid
vapors
(such
as
gasoline).
0.
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
11
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
repair
(first
close
cylinder
valve).
The
following
symp
toms 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
pres
sure
release.
Repair.
Do
NOT
attempt
to
repair.
Send
faulty
regula
tors
for
repair
to
manufacturers
designated
repair
cen
ter,
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
ac
cident.
(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.
Prohibited
use. Never
use
a
cylinder
or
its
contents
for
other
than
its
intended
use,
NEVER
as a
support
or
roller.
OM-296
Page
2

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 ex
changed.
3.
Hose
Prohibited
use.
Never
use
hose other than
that de
signed
for the
specified
gas.
A
general
hose
identifica
tion 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
f
it
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
culling
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
tintless
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.
Regulatoroutlet
(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
Liquid*
or
equivalent
per
gallon
of
water).
Bubbles
indi
cate
leak.
Clean
off
soapy
water
after
test;
dried
soap
is
combustible.
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
forwelding
or
cutting
operation;
rope may
bum.
*Trademrk
of Proctor &
Gamble.
OM-296
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-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
filter
plate
shade
no.
12
ordenser
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
bro
ken,
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
momentanly
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.
Generatorengine
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
weld
ing
equipment.
It
may
overheat
cables
and
cause
a
fire.
Loose
cable
connections
may
overheat
or
flash
and
cause
a
lire.
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,
work
table,
and
water
cir
culatorto
the
building
ground.
Conductors
must
be
ade
quate
to
carry
ground
currents
safely. Equipment
made
OM-296
Page
4

electrically
HOT
by
stray
current
may
shock,
possibly
fa
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.
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
opera
tion.
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
elec
trically
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
of
f.
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
bums,
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,SAFETYAND
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
29CFR
1910,
obtainable
from
the
of
Documents,
U.S.
Government
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
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
Broadway,
New
York,
NY
10018.
STANDARDS,
Superintendent
Printing
Office,
OM-296
Page
5

6.
ANSI
Standard
Z49.2,
FIRE
PREVENTION
IN
THE
USE
OF
CUTTING
AND
WELDING
PROCESSES
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
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
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
H ELD
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
Amen
can
National
Standards
Institute,
1430
Broadway,
New
York,
NY
10018.
OM-296
Page
6

SECTION 2
INTRODUCTION
Table
2-1.
SpecificatIons
Rated
Output
At 40%
Duty Cycle
Maximum
Open-
Circuit
voltage
input
At
Rated
Load
Output
50/60
Hz
Single-Phase
KW
Plasma
Gas
Weight
Amperes
At
KVA
200V 230V
Air
Net
Ship
30
Amperes
At
120
Volts
DC
370 Volts
DC
38
33
7.6
4
6
~
2.8
CFM
(79
Llmin.)
At 50
PSI
(345
kPa)
52
lbs.
(24
kg)
56
lbs.
(25
kg)
~
8-1/8
In.
(206
mm)
Figure
2-1.
Overall
Dimensions
TC-125
647
2-1.
DUTY
CYCLE
This
power
source
and
torch
are
rated
at
40
percent
duty
cycle.
The
duty cycle
is the
percentage
of
a
ten
minute
period
that
the
power
source
and
torch
can
be
operated
at
a
given
output
without
causing
overheating
and dam
age
to
the
power
source
and
torch.
Since
this
unit
is
rated
at
40
percent
duty
cycle,
it
can
be
operated
at
rated
load
for four minutes
Out
often.
During
the remain
ing
six
minutes,
the
unit
should
idle
to
permit
proper
cooling.
4A
CAUTION: EXCEEDING
THE
DUTY
CYCLE
RATINGS
will
damage the
power
source
and
torch.

Do
not
exceed
indicated
duty
cycles.
2-2.
GENERAL
INFORMATION
AND
SAFETY
A.
General
Information
presented
in
this
manual and
on
various la
bels,
tags,
and
plates
provided
on
this unit
pertains
to
equipment
design,
installation,
operation,
maintenance,
18-1/2 In.
(470
mm)
17-3/8
In.
(440
mm)
OM-296
Page
7

and
troubleshooting
which should
be
read,
understood,
and followed
for
the safe
and
effective
use
of this
equip
ment.

The
nameplate
of
this unit
uses
international
symbols
for
labeling
the
front
panel
controls.
The
symbols
also
appear
at
the
appropnate
section
in
the
text.
B.
Safety
The
installation,
operation,
maintenance,
and
trou
bleshooting
of this
equipment requires
practices
and
procedures
which
ensure
personal
safety
and the
safety
of
others.
Therefore,
this
equipment
is
to be
installed,
operated,
and
maintained
only by
qualified
persons
in
accordance
with
this manual and all
applicable
codes
such
as,
but not
limited
to,
those listed
at
the end of
Sec
tion
1
-
Safety
Rules.
Safety
instructions
specifically pertaining
to
this
unit
ap
pear
throughout
this manual
highlighted
by
the
signal
words
WARNING
and
CAUTION
which
identify
differ
ent
levels
of hazard.
WARNING
statements
include
installation,
operation,
and
maintenance
procedures
or
practices
which
if
not
carefully
followed
could
result
in serious
personal injury
or
loss of
life.
CAUTION
statements
include
installation,
operation,
and
maintenance
procedures
or
practices
which
if
not
carefully
followed
could
result
in
minor
personal
injury
or
damage
to
this
equipment.
A
third
signal
word,
IMPORTANT
highlights
instruc
tions
which
need
special
emphasis
to
obtain
the
most
ef
ficient
operation
of
this
equipment.
2-3.
RECEIVING-HANDLING
Before
unpacking
equipment,
check carton
for
any
dam
age
that
may
have
occurred
during shipment.
File
any
claims
for
loss
or
damage
wIth
the
deliverIng
carrier.
Assistance
for
filing
or
settling
claims
may
be
obtained
from the distributor
and/or
the
equipment
manufactur
ers
Transportation
Department.
When
requesting
information
about
this
equipment,
al
ways
provide
the
Model
Description
and
Serial
Number.
2-4.
DESCRIPTION
This
unit is
a
direct
current,
straight polarity (electrode
negative)
Plasma Arc
Cutting
(PAC)
power
source re
quiring single-phase
electrical
input.
The
unit
will
cut
metals
through
1/4
in.
(6.35
mm)
thick
using
the
Plasma
Arc
Cutting
(PAC)
process.
This
unit
is
designed
to
be
used
with the
supplied
model
APT-3000 curved-nozzle torch.
An
optional
model
APT-3000M
straight-nozzle
torch
is also
available.
Rated
output
is 30
amperes
at
120 volts
dc,
40
percent
duty
cycle.
Plasma
is air which has
been
heated
to
an
extremely
high
temperature
and ionized
so
that
the air
becomes
electrically
conductive.
The
electrode
is located inside
the
tip
of the torch.
The
torch
tip
has
a
small
opening (ori
fice)
which
constricts
the
arc.
The
compressed
air flows
through
the
arc
where
it is
heated
to
the
plasma
tem
perature
range.
Since
the air
cannot
expand
due
to
the
constriction of the
tip,
air is forced
through
the
orifice and
emerges
in
the
form
of
a
highly
compressed
airstream.
The heat formed
by
the
arc
and
the
plasma
melts the
metal,
and the airstream forces
the molten metal from
the
cut.
SECTION 3INSTALLATION
A~
WARNING: ELECTRIC
SHOCK
can
kill.

Do
not
touch live
electrical
parts.

Turn off
power
source,
and
remove
input
power
plug
from
receptacle
before
moving
unit.
IMPORTANT:
Read entire
Section
8
regarding
high-
frequency
equipment
location
and
installation
guide
lines
before
installing
this
unit.
3-1.
LOCATION
(Figure
2-1)
WARNING: FIRE
OR EXPLOSION
can
result
from
placing
unit
on
or
over
combustible
surfaces;
RESTRICTED
AIR
FLOW
causes
overheating
and
possible
damage
to
inter
nal
parts.

Do
not
locate
unit
over
combustible surfaces.

Maintain
at
least 10
inches
(254
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 this
power
source.
Warranty
is
void if
any
type
of
air
filtering
device
is
used.
Figure
2-1
gives
overall
dimensions
of the
power
source.
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.
3-2. AIR
FILTER/REGULATOR
INSTALLATION
AND
CONNECTIONS
(Figure
3-1
And
Figure
3-2)
IMPORTANT:
Be
sure
that
this
unit is
supplied
by
a
clean,
dry
air
supply
(see
Table
2-1.
Specifications
for
pressure
and
flow
rate
specifications).
1.
Remove
the
two
air
filter/regulator
mounting
bracket
screws
from
rear
of
unit,
and
install
air filter/
regulator
mounting
bracket
onto
rear
of
unit
(see
Figure
3-1
and
Figure
3-2).
a
OM-296
Page
8

2.
Remove
retaining
nrig
from
air
lifter/regulator,
and
insert
top
of
air
litter/regulator
through
bottom
of
mounting
bracket.
IMPORTANT:
Check
air
filter/regulator
for
proper
flow
direction. Position
air
filter/regulator
so
that
air
will
flow
in
direction
indicated
on
filter
body
(see
Figure
3-1),
or
install
with
plugged
port
toward
rear
of
unit.
3.
Secure
air
filter/regulatorto mounting
bracket
by
re
installing
and
tightening
retaining
nng.
4.
Coat
threads
with
teflon
tape,
and
install
and
tighten
end
of
supplied
12
in.
(305
mm)
long
air hose with
1/2
in.
(12.7mm)
fitting
to
Out
port
of
airfilter/regula
tor
(see
Figure
3-1).
5.
Coat threads
with teflon
tape,
and
install
and
tighten
remaining
end
of
air hose
to
air
input fitting
on
rear
of
unit
located
directly
below
input
power
cord
(see
Figure
3-2).
6.
Connect
air
line
hose
from
air
compressor
to
In
port
of
air
filter/regulator
(see
Figure
3-1).
3-3.
INPUT
VOLTAGE CHANGEOVER SWITCH
(Figure
3-2)
a
ELECTRIC
SHOCK
can
kill;
INCORRECT
VOLTAGE
can
damage
unIt.

Do
not
touch
live
electrical
parts.

Turn
off
power
source,
and
remove
input
power
plug
from
receptacle
before
inspecting
or
changing
switch
positions.

Do
not
operate
unit with
access cover
open
or
missing.
This
power
source
is
designed
to
be
operated
from
a
200
or
230
volts,
single-phase,
50/60
Hz,
ac
power
sup-
ply.
This
unit is
equipped
with
an
Input
Voltage
Change
over
switch
to
allow
operation
from
different
line
volt
ages.
To
change
the
switch
position,
proceed
as
fol
lows:
1.
Turn
off
power
source,
and
remove
input
power
plug
from
receptacle.
2.
Open
rear
panel
access
cover
(see
Figure
3-2).
3.
Place
Input Voltage
Changeover
switch
in
either
the
200
or
230
volts
position
to
match the
available
in
put
voltage.
4.
Close
and
secure
rear
panel
access
cover.
3-4.
ELECTRICAL
INPUT
CONNECTIONS
(Figure
3-2)
A
15
ft.
(4.6 m)
cord
with
a
NEMA 6-50
plug
attached
is
provided
on
this
unit.
Connect
the
plug
to
a
properly
grounded
and
protected
(fuses
or
circuit
breakers)
sin
gle-phase
200/230
volts
ac
receptacle.
The National
Electrical
Code
(Article
630B.,
1987
Edi
tion)
provides
standards
for
amperage
carrying
capabil
ity
of
supply
conductors
based
on
the
duty
cycle
of
the
power
source.
This
unit
has
a
40
percent
duty cycle
and
can
be
operated
at rated
load for four
minutes
out
of
ten;
therefore,
the
cord and
plug
supplied
with
this
unit
com
ply
with
these standards.
Be
sure.
that the
building
sup
ply
and
receptacle
comply
with
NEC
standards
and
any
additional
state
and local codes.
IMPORTANT:
The
supply wiring
for
the
power
source
must
be
capable
of
carrying
a
38
ampere
load for
200
volts
operation
or a
33
ampere
load
for
230
volts
opera
tion.
The
power
source
must be
the
only
load connected
to the
supply
Circuit.
Poor unit
performance
or
frequently
opening
line
fuses
or
circuit breakers
can
result from
an
inadequate
or
improper supply.
Ret&rilng
Mounting
Bracket
Locking
Screw
Air
Filter!
Arrow
indicates
Regulator
Direction
Of
Air
Flow
Adlustment
Knob
In
Port
Figure
3-1.
Air
Filter/Regulator
Components
And
Information
Connect
To
Air
input
Fitting
On Power
Source
1/2
in.
(12.7
mm)
Hose
Fitting
(to
Out
Port)
Air
Pressure
~
Gauge
TC-126
828
OM-296
Page
9

Input
Power
Cord
Air
input
Fitting
SECTION
4-
OPERATOR
CONTROLS
TB.125
648
Plasma
Cutting
Torch
Work
Clamp
GaelAIr
Switch
Figure
4-1.
Operator
Controls
Rear
Panel
Access
Cover
(Shown
in
Open
Position)
Locking
Screw
Location
Air
FIIter/Reguiator
Air Pressure
Gauge
Out
Port
Figure
3-2. Rear Panel View
With
Component
Locations
Fuse
Fl
Metai Switch
Thickness
Control
Input
Power
Power
On
Light
Light
TC-125
647
OM-296
Page
10