Tweco 161 S Inverter Arc Welder - Manual (Page 32)

THERMAL ARC 161 S INSTALLATION
Installation 3-10 3-10 Manual 0-5073 Manual 0-5073
3.09 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 downstream equipment, hose, hose
fitting, outlet fitting or low-pressure gauge.
Check for leaks using an approved leak detec-
tor 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, discontinue 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.
3.10 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 tension on the adjusting spring.
5. Check the gauges after a few minutes for
verification that the cylinder valve is closed
completely.
3.11 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 protected from dust, oil, and grease. The inlet
and outlet should be capped to protect against internal
contamination and prevent insects from nesting.