Tweco 3000 Merlin User Manual
Page 35
Manual 0-2532
4-3
OPERATION
6. Plasma Pressure Control
Adjusts plasma gas pressure. Pull knob out and turn clock-
wise to increase plasma pressure to desired level.
C. Rear Panel
1. Fan Assembly
Fan used to move the air across the internal compo-
nents for cooling purposes.
2. SECONDARY Gas Input Fitting
1/4" NPT female gas fitting used to supply the sec-
ondary gas to the system.
3. PLASMA Gas Input Fitting
1/4" NPT female gas fitting used to supply the plasma
gas to the system.
A-00989
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Figure 4-5 Power Supply Rear Panel
4. SECONDARY WATER Fitting
1/4" NPT female fitting used for connection of tap
water to the Power Supply. The water can be used
as a secondary gas for the torch when the front panel
SECONDARY switch is in the WATER position or
the Gas Control Option is installed.
5. Coolant Reservoir and Filler Cap
The coolant reservoir is located under the top panel
cover. The coolant reservoir supplies the system
with coolant to cool the torch parts during operation.
The maximum capacity of the reservoir is two gal-
lons of coolant.
Inside the reservoir, in the filler hole, is a basket and
a deionizer bag. The bag removes charged particles
from the coolant after it is returned to the reservoir.
If the coolant in the reservoir breaks down because
of these charged particles then a sensor on the res-
ervoir will cause the COOLANT COND indicator to
go OFF.
6. Coolant Level Indicator
A slot provided in the rear panel allows the operator
a visual check of the coolant level. The coolant
should be above the indicator mark on the slot.
7. Coolant Filter Assembly
The Coolant Filter Assembly on the rear panel is used
to filter the coolant as it returns to the reservoir. The
filter is a screen type which is easily cleaned or re-
placed.
8. Primary Input Power Cable Strain Relief
A strain relief supplied to secure the customer sup-
plied primary input power cable to the power supply.
The input AC power cable is routed through the strain
relief and is connected to the power input terminals
inside the unit.