Tweco Merlin 6000GST Master PS - Manual (Page 28)

INSTALLATION PROCEDURES 3-8 Manual 0-2652
Connect the gas supply to the Power Supply as follows:
1. Connect the black supply hose(s) from the plasma gas
regulator(s) directly to the input fitting on the rear panel
of the Power Supply marked PLASMA AIR, O2 (oxy-
gen), N2 (nitrogen), and Ar/H2 (argon/hydrogen).
Plasma N2 Gas
Supply Hose
A-01762
PLASMA Ar/H2
Gas Fitting
PLASMA O
2
Gas Fitting
Plasma O
2 Gas
Supply Hose
Plasma Ar/H2 Gas
Supply Hose
PLASMA N2
Gas Fitting
Figure 3-7 Plasma Gas Connections
2. Connect the yellow supply hose(s) from the second-
ary gas regulator(s) directly to the input fitting on the
rear panel of the Power Supply marked SECONDARY
AIR, SECONDARY OTHER, and SECONDARY N2 &
PRE FLOW N2 (nitrogen).
When oxygen (O
2
) is used as the plasma gas then nitro-
gen (N2) is required at the secondary for pre-flow gas
even if another gas is used for secondary gas.
NOTE
A typical 50 lb. CO
2
cylinder can deliver a con-
tinuous flow rate of 35 scfh (16.5 lpm). To obtain
the required flow rate for the torch, it may be nec-
essary to manifold several CO2 cylinders. Con-
tinuous flow requirements will depend on the spe-
cific application and duty cycle.
SECONDARY OTHER
Gas Supply
SECONDARY N2
& PRE FLOW N2
Gas Supply
A-01763
Figure 3-8 Secondary Gas Connections
C. Using Water Secondary
NOTES
Tap water should only be used as a secondary gas
on machine torches.
The tap water source does not need to be deionized,
but in water systems with extremely high mineral
content a water softener is recommended.
WARNING
The Optional Water Mist Secondary Flow Con-
trol Assembly must be installed when using water
as the secondary.