Lincoln Electric IM637-A manual GAS Input Connections, Output Connections

A-5 INSTALLATION A-5

GAS INPUT CONNECTIONS

Supply the PRO-CUT 55 with clean compressed air or nitrogen.

•Supply pressure must be between 80 psi and 150 psi.

•Pressure guage, located on the front of the machine, should be set to approximately 70 PSI for a 25 ft. torch and 75 PSI for a 50 ft. torch while gas is flowing (purging or cutting).

•Flow rate should be approximately 6.0 cfm (170 I/min.).

NOTE: Oil in the air supply to the PRO-CUT 55 can cause severe problems. Use only a clean air supply.

•Connect the gas supply to the PRO-CUT 55 regula- tor

•Compressed gas should be supplied to the fitting connection mounted on the filter at the rear of the machine. If necessary, this fitting can be removed allowing plumbing access through the 1/4” NPT input port on the filter body

•If compressed air is being used, it is highly recom- mended that an inline prefilter be installed in the air supply line ahead of the air connection to the PRO- CUT’S coalescing filter. While the coalescing filter is used to remove small amounts of oil and water aerosol particales from the air supply line, the pre- filter can be used to remove larger particulates before they reach the coalescing filter element. This will prolong the life of the coalescing filter element by up to six times what it would be without the prefilter, and in turn, prolong the life of the PRO-CUT torch and consumables as well.

•A standard nominal 5 micron inline prefilter is rec ommended; however, for optimum performance, select a prefilter with a 3 micron absoluterating.If these filter ratings are unavailable, anything with a rating less than, or equal to, 20 micron would be acceptable to use. Inline filter elements will generally filter the air with little restriction to the airflow until the element is about 75% contaminated. After this point, there will bea noticeable pressure drop in the line. Filter elements should be replaced when a pressure drop of 8-10 psi is indicated; however, for optimum performance of the PRO-CUT, the filter element should be replaced at or before the pressure drop reaches 8 psi. Be sure to select a prefilter that will accommodate the necessary flow rating for the PRO- CUT as specified in the Installation section of this instruction manual under the Gas Input Connections heading.

•While it is recommended that an inline prefilter be placed ahead of each PRO-CUT, that may be in stalled in a shared air supply line, one large in line prefilter may instead be used to accommodate sev- eral PRO-CUT’s simultaneously. If a shared pre is desired, it must be rated to provide the necessary flow rate, as specified, to ensure proper operation of each of the PRO-CUT’s sharing a connection.

NOTE: When using nitrogen gas from a cylinder, the cylinder must have a pressure regulator.

•Maximum psi from nitrogen gas cylinder to PRO- CUT 55 regulator should never exceed 150 psi.

•Install a hose between the nitrogen gas cylinder regulator and the PRO-CUT 55 gas inlet.

WARNING

CYLINDER could explode if dam- aged.

• Keep cylinder upright and chained to a fixed support.

•Keep cylinder away from areas where it could be damaged.

•Never lift machine with cylinder attached.

•Never allow the cutting torch to touch the cylin- der.

•Keep cylinder away from live electrical parts.

•Maximum inlet pressure 150 psi.

OUTPUT CONNECTIONS

Torch Connection

The Pro-Cut 55 is sent from the factory with a PCT 80 cutting torch. Additional cutting torches can be ordered from the K1571 series. Hand-held and mech- anized torches come with 25' or 50’ cables.

All torches are connected to the Pro-Cut with a quick connect on the casefront for easy change over. This feature is excellent for changing between a hand cut- ting torch and a mechanized torch.

For more information on the torch and its components, refer to the PCT80 Operator’s Manual (IM588 latest version).

PRO-CUT 55