Lincoln Electric IM491-B manual Output Connections, Torch Connection, Sequence of events

AIR INPUT CONNECTIONS

WARNING

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.

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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

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.

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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.

Work cable

Work clamp

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.

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