Lincoln Electric FLEXTEC 450 CE - Manual (Page 10)

A-3 INSTALLATION A-3
VRD™ (VOLTAGE REDUCTION DEVICE)
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.
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™ “enabled”. The VRD™
function can be disabled or enabled via a dip switch on the
control P.C. board.
The control board and dip switch can be accessed by
removing the case top 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.
LIFTING
Both handles should be used when lifting the FLEX-
TEC™ 450 CE. 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 CE
with accessories attached to it.
SAFETY PRECAUTIONS
ELECTRIC SHOCK can kill.
ONLY QUALIFIED PERSONNEL
SHOULD PERFORM THIS INSTALLA-
TION.
• 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 EQUIPMENT.
• DO NOT TOUCH ELECTRICALLY HOT PARTS.
• ALWAYS CONNECT THE FLEXTEC™ 450 CE
GROUNDING LUG (LOCATED INSIDE THE
RECONNECT INPUT ACCESS DOOR) TO A
PROPER SAFETY (EARTH) GROUND.
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WARNING
FLEXTEC™ 450 CE
STACKING
The FLEXTEC™ 450 CE cannot be stacked.
ENVIRONMENTAL LIMITATIONS
The FLEXTEC™ 450 CE is IP23 rated for use in an
outdoor environment. The FLEXTEC™ 450 CE should
not be subjected 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 CE over com-
bustible surfaces. Where there is a combustible
surface directly under stationary or fixed electrical
equipment, 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 meth-
ods.
HIGH FREQUENCY PROTECTION
Locate the FLEXTEC™ 450 CE away from radio con-
trolled machinery. The normal operation of the FLEX-
TEC™ 450 CE may adversely affect the operation of
RF controlled equipment, which may result in bodily
injury or damage to the equipment.
CAUTION
AMPS
340
375
400
450
VOLTS
34VDC
35VDC
36VDC
38VDC
TEMPERATURES
55°C
DUTY CYCLE
100%
60%
40%
20%
HIGH TEMPERATURE OPERATION
WELDER OUTPUT RATINGS AT 55°C
ELEVATED TEMPERATURES