Lincoln Electric IM491 PRO-CUT 125 - Manual (Page 11)

AIR INPUT CONNECTIONS
A source of clean compressed air or nitrogen must be
supplied to the PRO-CUT. The supply pressure must
be between 80 and 150 psi (551 and 1034 kPa). The
flow rate is approximately 8.0 cfm. Oil in the air is a
very severe problem and must be avoided.
Remove the plastic thread protector from the regulator
input port (located on the back of the machine). Use a
suitable gas connection fitting to make the connection
to the available air supply. The input port is a 1/4”
(6.3 mm) NPT thread. Tighten the air fitting to prevent
leakage but do not overtighten. The use of Teflon
tape to seal the connection is recommended.
Nitrogen from cylinders may be used with this
machine. The cylinder of nitrogen gas must be
equipped with a pressure regulator. No more than
150 psi (1034 kPa) may be supplied to the regulator
on the machine. Install a hose between the regulator
on the gas cylinder and the gas inlet on the cutter.
OUTPUT CONNECTIONS
Torch Connection
The PRO-CUT comes factory equipped with a cutting
torch. Cutting torches come with a 25 ft. (7.6 m) or a
50 ft. (15.2 m) cable.
Pictures of the torch and the required replacement
parts are shown in the parts lists in the back of this
manual. The ends of the cable to be connected to the
power source are unique. Follow the applicable
instructions given in Figure 2 in the back of this manu-
al.
Work Cable and Clamp Installation
Attach the work clamp to the work cable per the fol-
lowing:
1. Unplug the machine or turn the power switch to the
“Off” position.
2. Insert the work cable terminal lug with the larger
hole through the strain relief hole in the work clamp
as shown below.
3. Fasten securely with the bolt and nut provided.
OPERATING INSTRUCTIONS
Sequence of events:
A. Turn on the line power.
B. Connect the air supply to the machine.
C. Turn the power switch on.
-The green “Power On” LED should begin to
glow.
-The fan should start.
-If the “Safety” LED is glowing, push the “Safety
Reset” button. If there is no problem, the LED
will go off. If there is a problem, refer to Step F
and the Troubleshooting Guide.
D. Set the Purge/Run switch to Purge.
-The air should start.
-The “Air Pressure” LED should be lit.
-Adjust the air regulator so that the pressure
gauge reads 60 psi (414 kPa).
E. Set the Purge/Run switch to Run.
-The air will continue to run for 60 seconds of
postflow. If the trigger is activated within the first
twelve seconds, the pilot arc will immediately
start. After twelve seconds, a double trigger pull
is required to start the arc. The second trigger
pull must follow the first within one second to
start the pilot arc.
– 11 –
CYLINDER may explode if damaged
• Keep cylinder upright and chained to a
fixed support.
• Keep cylinder away from areas where it
may be damaged.
• Never lift equipment with cylinder attached.
• Never allow the cutting torch to touch cylinder.
• Keep cylinder away from live electrical circuits.
• Maximum inlet pressure 150 psig.
------------------------------------------------------------------------
WARNING
HIGH FREQUENCY SHOCK CAN
CAUSE INJURY OR FALL.
• Keep the cutting torch and cables in
good condition.
• Secure yourself in position to avoid a fall.
----------------------------------------------------------------------------
WARNING
Work cable
Work clamp