INSTALLATION | ||
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3.Be sure the torch and work cable rubber coverings are free of cuts and cracks that allow high frequen- cy leakage. Cables with high natural rubber content, such as Lincoln
4.Keep the torch in good repair and all connections tight to reduce high frequency leakage.
5.The work terminal must be connected to a ground within ten feet of the welder, using one of the fol- lowing methods:
•A metal underground water pipe in direct contact with the earth for ten feet or more.
•A 3/4" (19 mm) galvanized pipe or a 5/8" (16 mm) solid galvanized iron, steel or copper rod driven at least eight feet into the ground.
The ground should be securely made and the ground- ing cable should be as short as possible using cable of the same size as the work cable, or larger. Grounding to the building frame electrical conduit or a long pipe system can result in
6.Keep all access panels and covers securely in place.
7.All electrical conductors within 50 feet (15.2 m) of the welder should be enclosed in grounded rigid metallic conduit or equivalent shielding. Flexible
8.When the welder is enclosed in a metal building, several good earth driven electrical grounds (as in 5 above) around the periphery of the building are rec- ommended.
INPUT and GROUNDING CONNECTIONS
WARNING
ELECTRIC SHOCK can kill.
•Turn the input power OFF at the disconnect switch or fuse box before working on this equipment.
Be sure the voltage, phase, and frequency of the input power is as specified on the rating plate, located on the rear of the machine.
Fuse the input circuit with the recommended super lag fuses or delay type1 circuit breakers. Choose an input and grounding wire size according to local or national codes or use Section
Unbalanced AC TIG welding draws higher input cur- rents than those for Stick, DC TIG, or Balanced AC TIG welding. The welder is designed for these higher input currents. However, where unbalanced AC TIG welding above 185 amps is planned, the higher input currents require larger input wire sizes and fuses per Section
Remove the reconnect panel cover located near the back of the left case side to reveal the reconnect panel. Welder supply line entry provision is in the case rear panel. Entry is through a 1.75 inch (44 mm) diameter hole in the case back. Appropriate supply line strain relief clamp is provided by installer. (See Figure A.1)
FIGURE A.1
CONNECT INPUT
POWER LEADS
CONNECT INPUT
GROUND LEAD
CONNECT INPUT VOLTAGE LEVEL
Failure to observe these recommended installation procedures can cause radio or TV interference prob- lems and result in unsatisfactory welding performance resulting from lost high frequency power.
All connections should be made in accordance with all local codes and national electrical codes. Installation by a qualified electrician is recom- mended.
