3 | INSTALLATION | 3 |
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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 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 cover and all screws securely in place.
7.Electrical conductors within 50 ft (15.2m) of the welder should be enclosed in grounded rigid metal- lic conduit or equivalent shielding, wherever possi- ble. Flexible metallic conduit is generally not suit- able.
8.When the welder is enclosed in a metal building, the metal building should be connected to several good earth driven electrical grounds (as in 5 (b) above) around the periphery of the building.
Failure to observe these recommended installation procedures can cause radio or TV and electronic equipment interference problems and result in unsatis- factory welding performance resulting from lost high frequency power.
INPUT SUPPLY CONNECTIONS
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.
1.Connect terminal marked 
to earth ground per National Electric Code or any local codes.
2.Connect the supply lines to the line switch studs as shown in figure A.1.Use insulated barrel type terminals to fit #10- 32 studs. Torque each nut to 3.0 Nm.
3.Install in accordance with all local and national electrical codes.
The Square Wave TIG is supplied with one cord connector. The cord connector provides a strain relief for the input power cord as it passes through the rear access hole. The cord con- nector is designed for a cord diameter of 14.2 to 25.4 mm (.560 to 1.00 in.). Strip away outer jacket of cord, trim fillers and insert conductors mthrough cord connector. The jacket- ed portion of the cord must go through the cord connector. Tighten both connector screws.
1Also called “inverse time” or “thermal/magnetic” circuit breakers; circuit break- ers which have a delay in tripping action that decreases as the magnitude of the current increases.
Refer to the Technical Specifications page at the beginning of this section. Fuse the input circuit with the recommended
super lag fuses or delay type1 circuit breakers. Using fuses or circuit breakers smaller than recommended may result in “nuisance”
INPUT RECONNECT PROCEDURE
On multiple input voltage welders, be sure the machine is connected per the following instructions for the voltage being supplied to the welder.
CAUTION
Failure to follow these instructions can cause immediate fail- ure of components within the welder.
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Multiple voltage models are shipped connected for the high- est voltage. To change this connection refer to the following instructions.
WARNING
ELECTRIC SHOCK can kill.
•Turn the input power OFF at the disconnect switch or fuse box before working on this equipment.
For 220-240V connection (Refer to figure A.1):
1.Remove the sheet metal cover.
2.Disconnect the copper link between the switch stud and H4.
3.Connect the copper link from the switch stud to H2 and tighten nuts securely.
4.Replace sheet metal cover and all screws.
For 380V connection (Refer to figure A.1):
1.Remove the sheet metal cover.
2.Disconnect the copper link between the switch stud and H4.
3.Connect the copper link from the switch stud to H3 and tighten nuts securely.
4.Replace sheet metal cover and all screws.
For 400-415V connection (Refer to figure A.1):
1.Remove the sheet metal cover.
2.Disconnect the copper link between the switch stud and H2 or H3.
3.Connect the copper link from the switch stud to H4 and tighten nuts securely.
4.Replace sheet metal cover and all screws.