Tweco 201 ts Thermal Arc - Manual (Page 26)

Installation, Operation And Setup 3-8 Manual 0-5149
THERMAL ARC 201 TS INSTALLATION
7. Connect the other end of the supplied gas hose to
the gas inlet fitting on the rear panel of the welder
and tighten with a wrench. Caution: DO NOT over
tighten.
8. Open the Argon Cylinder Valve to the fully open
position.
9. Connect the ground (work) clamp to your work
piece.
10. Set the DOWN SLOPE control knob to the desire
weld current ramp down time. Refer to Section
4.01.
11. Set the weld current control knob to the desired
amperage.
12. The tungsten must be ground to a blunt point
in order to achieve optimum welding results. It
is critical to grind the tungsten electrode in the
direction the grinding wheel is turning.
13. Install the tungsten with approximately 1/8” to ¼”
sticking out from the gas cup, ensuring you have
correct sized collet.
14. Tighten the back cap then open the valve on the
torch.
15. Plug the power cable into the appropriate outlet,
and turn the switch to the “ON” position. The
power L.E.D. light should illuminate. Set the
“Process Selection Switch” to LIFT TIG and HF
TIG
16. You are now ready to begin TIG Welding.
3.08 LEAK TESTING THE SYSTEM
Leak test the system before putting into operation.
1. Be sure that there is a valve in the downstream
equipment to turn off the gas flow.
2. With the cylinder valve open, adjust the
regulator to deliver the maximum required
delivery pressure.
3. Close the cylinder valve.
4. Turn the adjusting screw/knob counterclockwise
one turn.
a) If the high-pressure gauge reading drops,
there is a leak in the cylinder valve, inlet
fitting, or high-pressure gauge.
b) If the low-pressure gauge drops, there is a
leak in the down stream equipment, hose,
hose fitting, outlet fitting or low-pressure
gauge. Check for leaks using an approved
leak detector solution.
c) If the high-pressure gauge drops and the
low-pressure gauge increases at the same
time, there is a leak in the regulator seat.
d) If the regulator requires service or repair,
take it to a qualified repair technician.
5. Once leak testing has been performed and
there are no leaks in the system, slowly open
the cylinder valve and proceed.
!
WARNING
If a leak has been detected anywhere in
the system, dis continue use and have
the system repaired. DO NOT use leaking
equipment. Do not attempt to repair a
leaking system while the system is under
pressure.
3.09 WHEN YOU FINISH USING THE
REGULATOR
1. Close the cylinder valve.
2. Open the valve on the downstream equipment.
This drains all pressure from the system.
3. Close the valve on the downstream
equipment.
4. Turn the adjusting screw counterclockwise to
release the ten sion on the adjusting spring.
5. Check the gauges after a few minutes for
verification that the cylinder valve is closed
completely.
3.10 STORAGE OF THE REGULATOR
When the regulator is not in use and has been
removed from the cylinder, it should be stored in an
area where it will be pro tected from dust, oil, and
grease. The inlet and outlet should be capped to
protect against internal contamination and prevent
insects from nesting.