Tweco 3000 Merlin - Manual (Page 27)

Manual 0-2532 3-9 INSTALLATION
Plasma Gas
Supply Hose
Secondary Gas
Supply Hose
Secondary Gas
Fitting
Plasma Gas
Fitting
A-00999
Figure 3-10 Gas Connections Using Gas Cylinders
2. Connect the yellow supply hose from the second-
ary gas regulator directly to the input fitting on
the rear panel of the Power Supply marked SEC-
ONDARY. Do not use the air line filter with high
pressure cylinders.
NOTE
A typical 50 lb. CO2 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 necessary to manifold several CO2
cylinders. Continuous flow requirements will
depend on the specific application and duty
cycle.
C. Using Water Secondary
NOTES
Tap water should only be used as a second-
ary 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 rec-
ommended.
Tap water can be used as a secondary gas and is con-
nected to the Power Supply as follows:
1. The tap water source must be capable of delivering a
minimum water pressure of 50 psi (3.5 BAR) and flow
of 6 gph (23 lph).
2. Connect the tap water supply hose to the input of a
Water Regulator.
3. Connect the output of the water regulator to the fit-
ting marked SEC. WATER on the rear panel of the
Power Supply.
NOTE
The water source does not need to be deion-
ized, but in water systems with extremely high
mineral content a water softener is recom-
mended.
OUTPUT OUTPUT TO CONTROL
MODULE MODULE
AIR PLASMA INPUT INPUT
N2 PLASMA INPUT INPUT
O2 PLASMA INPUT INPUT
PLASMA GAS PLASMA GAS
Ar/H 2 PLASMA INPUT INPUT
Water Secondary
Hose From Supply
Secondary Water
Fitting
A-01000
Figure 3-11 Secondary Water Connection
4. Set the SECONDARY selector switch on the front
panel of the Power Supply to the WATER position.