INSTALLATION
3.Be sure the torch and work cable rubber coverings are free of cuts and cracks that allow high fre- quency 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)A metal underground water pipe in direct con- tact with the earth for ten feet or more.
b)A 3/4” (19mm) galvanized pipe or a 5/8” (16mm) solid galvanized iron, steel or copper rod driven at least eight feet into the ground.
The ground should be securely made and the grounding 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 ft (15.2m) of the welder should be enclosed in grounded, rigid metallic conduit or equivalent shielding. Flexible metallic conduit is generally not suitable.
8.When the welder is enclosed in a metal buidling, several good earth driven electrical grounds (as in 5 (b) above) around the periphery of the building are recommended.
Failure to observe these recommended installation procedures can cause radio or TV interference problems and result in unsatisfactory welding per- formance resulting from lost high frequency power.
INPUT CONNECTIONS
Be sure the voltage, phase, and frequency of the input power is as specified on the rating plate, located on the front of the machine.
Welder supply line entry provision is in the case rear panel with a removable cover over the input connec- tion panel area. See Figure A.1.
FIGURE A.1 – REAR PANEL
2
3
1.WARNING DECAL
2.INPUT POWER ENTRY
3.RECONNECT PANEL COVER
GROUND CONNECTION
The frame of the welder must be grounded. A ground terminal marked with the symbol is located at the bot- tom of the input box for this purpose.
See your local and national electrical codes for proper grounding methods.
Also follow other grounding instructions given in the section “High Frequency Interference Protection.”
INPUT SUPPLY CONNECTION
Be sure the voltage, phase, and frequency of the input power is as specified on the welder nameplate.
WARNING
ELECTRIC SHOCK can kill.
•Have a qualified electrician install and service this equipment.
•Turn the input power off at the fuse box before working on this equip- ment.
•Do not touch electrically hot parts.
Have a qualified electrician connect the input power leads to L1 and L2 of the input contactor in accor- dance with all local codes and national electrical codes. Use a single phase line or one phase of a two or three phase line. Refer to the connection diagram located on the inside of the cover of the Reconnect Panel. Also see Figure A.2.
SQUARE WAVE TIG 355
