Lincoln Electric SP-255 INSTALLATIONA-3, Output Polarity Connection, GUN and Cable Installation

INSTALLATIONA-3

The 230/460/575 volt 60 Hz model is not equipped with a plug, input cable or receptacle.

4.Using the following instructions have a qualified electrician connect the receptacle or cable to the input power lines and the system ground per the U.S. National Electrical Code and any applicable local codes. See the “Technical Specifications” page at the beginning of this chapter for proper wire sizes. For long runs over 100 feet (30 m), larg- er copper wires should be used. Fuse the two hot lines with super lag type fuses as shown in the fol- lowing diagram. The center contact in the recepta- cle is for the grounding connection. A green wire in the input cable connects this contact to the frame of the welder.

This ensures proper grounding of the welder frame when the welder plug is inserted into the receptacle.

SINGLE PHASE INPUT SUPPLY RECONNECT DIAGRAM FOR 230/460/575 60 HZ MACHINES

WARNING	TURN THE INPUT POWER OFF AT THE DISCONNECT SWITCH BEFORE INSTALLING
	OR SERVICING THIS MACHINE.
	DO NOT TOUCH ELECTRICALLY "HOT" PARTS SUCH AS OUTPUT TERMINALS
	OR INTERNAL WINDINGS.
	GROUNDING SCREW	MUST BE CONNECTED TO A GOOD EARTH GROUND PER
	NATIONAL ELECTRICAL CODE.
	DO NOT OPERATE WITH COVERS REMOVED.
HIGH VOLTAGE
	ONLY QUALIFIED PERSONNEL SHOULD INSTALL OR SERVICE THIS EQUIPMENT.
can kill

1.ALL MACHINES ARE SHIPPED FROM THE FACTORY CONNECTED FOR THE HIGHEST NAMEPLATED SINGLE PHASE INPUT VOLTAGE. TO CHANGE CONNECTIONS FOR A DIFFERENT INPUT VOLTAGE. RECONNECT BOTH COPPER JUMPERS PER DIAGRAM BELOW. ALWAYS CONNECT JUMPERS BETWEEN OUTER STEEL NUT AND

INNER BRASS NUT ON TERMINAL STUDS.

2.CONNECT THE INPUT POWER TO THE INPUT TERMINAL BLOCK, L1 AND L2 AT THE UPPER LEFT CORNER OF THE PANEL. TORQUE TO 16 IN-LBS.

3.CONNECT A GROUNDING LEAD TO THE GROUND STUD ON THE MACHINE NEAR THE INPUT TERMINAL BLOCK.

SINGLE PHASE	230V / 60HZ.				460V. / 60HZ.				575V. / 60HZ.
VOLTAGE
L1	L2		5	L1	L2		5	L1	L2	5
JUMPER	4	2				2
CONNECTION					4				4	2
DIAGRAMS	1	3			1	3			1	3

BOTH

JUMPERS

TO GROUND PER NATIONAL ELECTRICAL CODE

SINGLE PHASE INPUT POWER SUPPLY LINES

S21531-1

CONNECT TO A SYSTEM GROUND-

ING WIRE. SEE THE UNITED STATES

NATIONAL. ELECTRICAL CODE

AND/OR LOCAL CODES FOR OTHER

DETAILS AND MEANS FOR PROPER

GROUNDING.

CONNECT TO HOT WIRES OF A

THREE-WIRE, SINGLE PHASE SYS-

TEM OR TO ONE PHASE OF A TWO

OR THREE PHASE SYSTEM.

OUTPUT POLARITY CONNECTION

WARNING

Turn the welder power switch off before changing output connection.

The welder, as shipped from the factory, is connected for electrode positive (+) polarity. This is the normal polarity for GMA welding.

If negative (–) polarity is required, interchange the connections of the two cables located in the wire drive compartment near the front panel. The electrode cable, which is attached to the wire drive, is to be con- nected to the negative (–) labeled terminal and the work lead, which is attached to the work clamp, is to be connected to the positive (+) labeled terminal.

GUN AND CABLE INSTALLATION

The Magnum™ 250SP gun and cable provided with the SP-255 is factory installed with a liner for .035-

.045" (0.9-1.2 mm) electrode and an .035" (0.9 mm) contact tip. Install the .045 tip (also provided) if this wire size is being used. For other wire sizes, see Gun and Cable Maintenance.

WARNING

Turn the welder power switch off before installing gun and cable.

1.Lay the cable out straight.

2.Make sure all pins on the gun cable connector are aligned with the proper mating sockets on the front panel gun connector and then join the connectors and tighten the hand nut on the gun cable connec- tor.

NOTE: If a gun and cable other than the Magnum 250SP is to be used, it must conform to standard European-style connector (Magnum Fast-Mate™) specifications. See diagram below.

IDEALARC SP-255