Tweco Merlin 6000GST Master PS - Manual (Page 27)

Manual 0-2652 3-7 INSTALLATION PROCEDURES
All Merlin 6000GST Systems are supplied with a Two Stage Air
Line Filter attached to the rear of the Master Power Supply. The
following procedure is the recommended shop air connection
method:
NOTE
The Two Stage Air Line Filter Assembly is to be
used when using shop air as the Plasma Gas.
1. Place thread sealer on the threads of the Street Elbow
on a Y-Hose Assembly (see NOTES).
NOTES
Do Not use teflon tape as a thread sealer as small
particles of the tape may break off and cause the
small gas passage to be blocked in the torch.
The Y-Hose Assembly is customer supplied and is
shown to illustrate one method of connecting the
customer's air supply.
2. Connect the air supply hose from a Y-Hose Assembly
to the street elbow on the Air Line Filter input port
(IN). The Y-Hose Assembly should have already been
installed, if shop air was being used as the plasma
and secondary gases.
A-01761
Shop Air
Gas Input
Air Filter
Assembly
SECONDARY AIR
Gas Fitting
Y-Hose
Assembly
From Supply
Figure 3-6 Supply Hose Connections
3. Apply thread sealer (see NOTE) to the other elbow of the Y-
Hose Assembly.
NOTE
Do Not use teflon tape as a thread sealer as small
particles of the tape may break off and cause the
small gas passage to be blocked in the torch.
4. Connect the elbow fitting to the SECONDARY AIR 1/4 NPT
gas fitting.
5. Connect the supply line from the air supply source to the Y-
hose assembly. The supply hose must be 3/8 inch (10 mm)
minimum inside diameter to provide adequate air flow.
B. Using High-Pressure Gas Cylinders
NOTES
Refer to the regulator manufacturer’s specifica-
tions for installation and maintenance procedures.
Refer to Section 6.05, System Options and Acces-
sories, or a listing of available high-pressure regu-
lators.
Do not use an air line filter with high pressure gas
cylinders.
Examine the cylinder valves to be sure they are clean and
free of oil, grease or any foreign material. Momentar-
ily open each cylinder valve to blow out any dust
which may be present.
WARNING
Do not stand in front of the valve outlet when open-
ing.
Each cylinder must be equipped with an adjustable high-
pressure regulator capable of pressures up to 125 psi
(8.6 bar) maximum and flows of up to 700 scfh (328 lpm) for
cutting or gouging.
CAUTION
Maximum input pressure to the internal regulator
on the Power Supply must not exceed 125 psi (8.6
bar).