Weco Discovery 300 AC/DC, Instruction Manual

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Cod.006.0001.1840
13/07/2016 v2.2
ENGLISH
Discovery 300 AC/DC
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4.3 PREPARING FOR TIG WELDING
Installation with cooling unit
1. Set the welding power source ON/OFF switch to “O” (unit de-
energized).
2. Remove the screws from the power source cabinet.
3. Loosen the screws of the upper brackets of the cooler and open
out the brackets slightly.
4. Place the power source on top of the cooler.
5. Secure the cooler brackets to the power source using the
previously removed screws.
6. Connect the plug of the cooler power cable to the cooler power
socket on the rear panel of the welding power source.
7. Set the cooler ON/OFF switch to “I” (unit powered).
8. Plug the power cable plug into a mains socket outlet.
9. Connect the gas hose from the welding gas cylinder to the rear
gas socket.
10. Open the cylinder gas valve.
11. Connect the gas hose from the welding torch to the front gas
socket.
12. Connect the torch plug to the welding socket on the basis of the
polarity required by the type of electrode in question.
13. Choose the electrode based on the type of material and thickness
of the workpiece to be welded.
14. Insert the electrode in the TIG torch.
15. Connect the plug of the ground clamp to the welding socket on the
basis of the polarity required.
16. Connect the earth clamp to the workpiece being processed.
17. Set the welding power source ON/OFF switch to “I” (unit
powered).
18. Select the following welding mode on the user interface: TIG DC /
TIG AC
19. Press the torch trigger with the torch well clear of any metal parts.
This serves to open the gas solenoid valve without striking the