Receiving-Handling; Description; Section 3Installation; Location - Miller Electric AUTO ARC QUICK CUT 5000 Owner's Manual

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 3INSTALLATION
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
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