Tweco 161 S Inverter Arc Welder - Manual (Page 24)

THERMAL ARC 161 S INSTALLATION
Installation 3-8 Manual 0-5199
9. Set the “Process Selection Switch” to LIFT TIG
10. Set the weld current control knob to the desired
amperage.
11. 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.
12. Install the tungsten with approximately 1/8” to ¼”
sticking out from the gas cup, ensuring you have
correct sized collet.
13. Tighten the back cap then open the valve on the
torch.
14. You are now ready to begin TIG Welding.
3.08 Victor Regulator
Pressure regulator (Figure 3-4) attached to the cylinder
valve reduce high cylinder pressures to suitable low
working pressures for welding, cutting, and other
applications.
LOW PRESSURE
GAUGE (DELIVERY)
HIGH PRESSURE
GAUGE (SUPPLY)
INLET
CONNECTION
OUTLET
CONNECTION
PRESSURE
ADJUSTING
SCREW
Art # A-09414
Figure 3-4: Victor CS Regulator
!
WARNING
Use the regulator for the gas and pressure for
which it is designed. NEVER alter a regulator
for use with any other gas.
NOTE
Regulators purchased with open 1/8”, 1/4”,
3/8”, or 1/2” NPT ports must be assembled
to their intended system.
1. Note the maximum inlet pressure stamped on the
regulator. DO NOT attach the regulator to a system
that has a higher pressure than the maximum
rated pressure stamped on the regulator.
2. The regulator body will be stamped “IN” or “HP”
at the inlet port. Attach the inlet port to the system
supply pressure connection.
3. Wrap pipe threads with Teflon tape 1 1/2 to 2
turns to effect a seal. If other sealants are used,
they must be compatible with the gas that will be
used in the system.
4. If gauges are to be attached to the regulator and
the regu lator is stamped and listed by a third party
(i.e. “UL” or “ETL”). The following requirements
must be met:
a) Inlet gauges over 1000 PSIG (6.87 mPa) shall
conform with the requirements of UL 404,
“Indicating Pressure Gauges for Compressed
Gas Service.”
b) Low pressure gauges must be UL recognized
for the class of regulator they are being used
on according to UL252A.
!
WARNING
DO NOT use a regulator that delivers
pressure exceeding the pressure rating of the
downstream equipment unless pro visions
are made to prevent over-pressurization (i.e.
system relief valve). Make sure the pressure
rating of the down stream equipment is
compatible with the maximum delivery
pressure of the regulator.
5. Be sure that the regulator has the correct pressure
rating and gas service for the cylinder used.
6. Carefully inspect the regulator for damaged
threads, dirt, dust, grease, oil, or other flammable
substances. Remove dust and dirt with a clean
cloth. Be sure the inlet swivel filter is clean and
in place. Attach the regulator (Figure 3-5) to the
cylinder valve. Tighten securely with a wrench.