Lincoln TOMAHAWK 625, Operator'S Manual

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A-2
INSTALLATION
TOMAHAWK™ 625
A-2
Read entire Installation Section before installing the
TOMAHAWK™ 625.
SAFETY PRECAUTIONS
ELECTRIC SHOCK CAN KILL.
• Only qualified personnel
should install this machine.
• Turn the input power OFF
at the disconnect switch or
fuse box and discharge
input capacitors before
working inside the equip-
ment.
• Do not touch electrically hot parts.
• Turn the TOMAHAWK™ 625 Power Switch
OFF when connecting power cord to input
power.
___________________________________________
SELECT PROPER LOCATION
Place the TOMAHAWK™ 625 where clean cool air
can freely circulate in and out of the side louvers. Dirt,
dust or any foreign material that can be drawn into the
machine should be kept at a minimum. Failure to
observe these precautions can result in excessive
operating temperatures and nuisance shutdown of the
machine.
A source of clean, dry air or nitrogen must be supplied
to the TOMAHAWK™ 625 when using external air
supply. Oil in the air is a severe problem and must be
avoided. The supply pressure must be between 80
and 150 psi. The flow rate is approximately 4.0 cfm
(113 l/min.). Failure to observe these precautions
could result in excessive operating temperatures or
damage to the torch.
STACKING
The TOMAHAWK™ 625 cannot be stacked.
TILTING
The TOMAHAWK™ 625 must be placed on a stable,
level surface so it will not topple over.
HIGH FREQUENCY INTERFERENCE
PROTECTION
The TOMAHAWK™ 625 employs a touch start mech-
anism for arc initiation which eliminates high frequen-
cy emissions from the machine as compared with
spark gap and solid state type high frequency genera-
tors. Keep in mind, though, that these machines may
be used in an environment where other high frequen-
cy generating machines are operating. By taking the
following steps, high frequency interference into the
TOMAHAWK™ 625 can be minimized
(1) Make sure the power supply chassis is connected
to a good earth ground. The work terminal ground
does NOT ground the machine frame.
(2) Keep the work clamp isolated from other work
clamps that have high frequency.
(3) If the work clamp cannot be isolated, then keep
the clamp as far as possible from other work
clamp connections.
(4) When the machine is enclosed in a metal building,
several good earth driven electrical grounds
around the periphery of the building are recom-
mended.
Failure to observe these recommended installation
procedures may cause improper function of the TOM-
AHAWK™ 625 or possibly even damage to the control
system or power supply components.
INPUT ELECTRICAL CONNECTIONS
The TOMAHAWK™ 625 is rated for 208VAC and
230VAC input voltage. Before installing the machine,
check that input supply voltage, phase, and frequency
are the same as the machine's voltage, phase, and
frequency as specified on the machine's rating plate.
• The TOMAHAWK™ 625 should be connected only
by a qualified electrician. Installation should be
made in accordance with local codes.
For use on engine drives, keep in mind the above
input draw restrictions and the following precaution.
The TOMAHAWK™ 625 can be operated on engine
driven generators as long as the 230 volt auxiliary
meets the following conditions:
• The AC waveform peak voltage is below 400 volts.
• The AC waveform frequency is between 45 and 65
Hz.
• The RMS voltage of the AC waveform is always
greater than 208VAC.
WARNING