Lincoln Electric IM594 PRO-CUT 20 - Manual (Page 8)

A-2 INSTALLATION
PRO-CUT 20
A-2
Read entire Installation Section before installing the
PRO-CUT 20.
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 equipment.
• Do not touch electrically hot parts.
• Turn the PRO-CUT Power Switch OFF
when connecting power cord to input
power.
___________________________________________
SELECT PROPER LOCATION
Place the Pro-Cut 20 where clean cool air can freely
circulate in and out 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 temper-
atures and nuisance shutdown of the machine.
A source of clean, dry air or nitrogen must be supplied
to the Pro-Cut 20. 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 approximate-
ly 4.0 cfm (113 l/min.). Failure to observe these pre-
cautions could result in excessive operating tempera-
tures or damage to the torch.
STACKING
The PRO-CUT 20 cannot be stacked.
TILTING
The PRO-CUT 20 must be placed on a stable, level
surface so it will not topple over.
HIGH FREQUENCY INTERFERENCE
PROTECTION
The Pro-Cut 20 employs a touch start mechanism for
arc initiation which eliminates high frequency emis-
sions from the machine as compared with spark gap
and solid state type high frequency generators. Keep
in mind, though, that these machines may be used in
an environment where other high frequency generat-
ing machines are operating. By taking the following
steps, high frequency interference into the Pro-Cut
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 ground clamp isolated from other
work clamps that have high frequency.
(3) If the ground 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 Pro-
Cut or possibly even damage to the control system or
power supply components.
INPUT ELECTRICAL
CONNECTIONS
The Pro-Cut 20 is rated for 115VAC or 230VAC inputs
and will automatically reconnect for the supplied volt-
age. The machine is shipped from the factory for oper-
ation on 115VAC 15 amp circuits. Use on 15 amp
branch circuits will limit cutting output as indicated by
the graphics around the output knob. If the output is
set at 20 amps (maximum) the input fuse or circuit
breaker will “blow” in roughly 30 seconds (depending
on fuse type).
To achieve full output current with 115VAC inputs,
replace the 15 amp plug with the supplied 20 amp
plug and connect the unit to a 20 amp branch circuit
with super lag fuses (or equivalent breaker). To install
the supplied 20A plug: Connect the white (neutral)
wire under terminal clamp with silver screw, and black
(hot) wire under terminal clamp with brass screw.
Connect green wire under terminal clamp with green
screw. Tighten terminal wire clamp screws securely.
WARNING