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A-3
SAFETY PRECAUTIONS
WARNING
ELECTRIC SHOCk can kill.
ONLY QUALIFIED PERSONNEL SHOULD
PERFORM THIS INSTALLATION.
• TURN OFF INPUT POWER TO THE
POWER SOURCE AT THE DISCONNECT
SWITCH OR FUSE BOX BEFORE WORkING ON THIS
EQUIPMENT. TURN OFF THE INPUT POWER TO
ANY OTHER EQUIPMENT CONNECTED TO THE
WELDING SYSTEM AT THE DISCONNECT SWITCH
OR FUSE BOX BEFORE WORkING ON THE EQUIP-
MENT.
• DO NOT TOUCH ELECTRICALLY HOT PARTS.
• ALWAYS CONNECT THE FLEXTEC™ 450 GROUND-
ING LUG (LOCATED INSIDE THE RECONNECT
INPUT ACCESS DOOR) TO A PROPER SAFETY
(EARTH) GROUND.
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VRD™ (VOLTAGE REDUCTION DEVICE)
(For Code 11941 only)
The VRD™ feature provides additional safety in the CC-
Stick mode. The VRD™ reduces the OCV (Open Circuit
Voltage) at the welding output terminals while not welding to
less than 35VDC peak.
The VRD™ requires that the welding cable connections be
kept in good electrical condition because poor connections
will contribute to poor starting. Having good electrical con-
nections also limits the possibility of other safety issues
such as heat-generated damage, burns and fires.
The machine is shipped with VRD™ "Disabled". The VRD™
function can be disabled or enabled via dip switches on the
control P.C. board. Dip switch setting will differ depending
on input voltage.
The control board and dip switches can be accessed by
removing the case top and side as shown in the Operation
Section figure B.3.
SELECT SUITABLE LOCATION
LOCATION AND VENTILATION FOR COOLING
Place the welder where clean cooling air can freely
circulate in through the rear louvers and out through
the case sides. Dirt, dust, or any foreign material that
can be drawn into the welder should be kept at a mini-
mum. Failure to observe these precautions can result
in excessive operating temperatures and nuisance
shutdowns.
TILTING
Place the machine directly on a secure, level surface
or on a recommended undercarriage. The machine
may topple over if this procedure is not followed.
INSTALLATION
LIFTING
Both handles should be used when lifting the
Flextec™ 450. When using a crane or overhead
device a lifting strap should be connected to both han-
dles. Do not attempt to lift the Flextec™ 450 with
accessories attached to it.
STACkING
The Flextec™ 450 cannot be stacked.
ENVIRONMENTAL LIMITATIONS
The Flextec™ 450 is IP23 rated for use in an outdoor
environment. The Flextec™ 450 should not be sub-
jected to falling water during use nor should any parts
of it be submerged in water. Doing so may cause
improper operation as well as pose a safety hazard.
The best practice is to keep the machine in a dry,
sheltered area.
Do not mount the Flextec™ 450 over combustible
surfaces. Where there is a combustible surface
directly under stationary or fixed electrical equip-
ment, that surface shall be covered with a steel
plate at least .060" (1.6mm) thick, which shall
extend not less than 5.90" (150mm) beyond the
equipment on all sides.
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INPUT AND GROUNDING
CONNECTIONS
MACHINE GROUNDING
The frame of the welder must be grounded. A ground
terminal marked with the symbol shown is located
inside the reconnect/input connection area for this
purpose. See your local and national electrical codes
for proper grounding methods.
HIGH FREQUENCY PROTECTION
Locate the Flextec™ 450 away from radio controlled
machinery. The normal operation of the Flextec™ 450
may adversely affect the operation of RF controlled
equipment, which may result in bodily injury or dam-
age to the equipment.
FLEXTEC™ 450
CAUTION
A-3
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