Tweco Merlin 6000 Master PS - Manual (Page 27)

Manual 0-2568 3-9 INSTALLATION PROCEDURES
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 regula-
tor on the Power Supply must not exceed 125 psi
(8.6 bar).
Connect the gas supply to the Power Supply per the fol-
lowing:
1. Connect the black supply hose from the plasma gas
regulator directly to the input fitting on the rear panel
of the Power Supply marked PLASMA.
Plasma Gas
Supply Hose
Secondary Gas
Supply Hose
Secondary Gas
Fitting
Plasma Gas
Fitting
A-01503
Figure 3-10 Gas Connections Using Gas Cylinders
2. Connect the yellow supply hose from the secondary
gas regulator directly to the input fitting on the rear
panel of the Power Supply marked SECONDARY. Do
not use the air line filter with high pressure cylinders.
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 CO
2
cylinders. Con-
tinuous flow requirements will depend on the spe-
cific application and duty cycle.
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.
Tap water can be used instead of a secondary gas and is
connected 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 8 gph (35.2 lph).
2. Connect the tap water supply hose to the input of a
Water Pressure 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 deionized,
but in water systems with extremely high mineral
content a water softener is recommended.
OUTPUT OUTPUT TO TO CONTROL CONTROL
MODULE MODULE
AIR AIR PLASM A PLASMA INPUT INPUT
N2 PLASMA PLASMA INPUT INPUT
O2 PLASM A PLASMA INPUT INPUT
PLAS MA G AS PLASMA GAS
Ar/H Ar/H 2 PLASM A PLASMA INPUT INPUT
Water Secondary
Hose From Supply
Secondary Water
Fitting
A-01504
Figure 3-11 Secondary Water Connection