Tweco 1000 Merlin(Dec2004) - Manual (Page 39)

Manual 0-2708 4-3 OPERATION
D. Torch Bulkhead
The torch bulkhead is located under the Control/Gauge
Panel.
A-02173
2 1
7 3
4
5
6
Figure 4-5 Torch Panel Connections
1. Plasma (+) Gas Lead Connection
Left-hand thread fitting to connect the torch plasma
lead to the unit.
2. Secondary Gas Lead Connection
Fitting to connect the torch secondary lead to the unit.
3. Coolant Supply (-) Lead Connection
Fitting to connects the torch coolant supply lead to
the unit.
4. Coolant Return Lead Connection
Left-hand thread fitting to connect the torch coolant
return lead to the unit.
5. Torch Lead Shield Stud
Stud used to secure the torch lead shield ring lug
when system is used without the Optional Remote
Arc Starter.
6. Optional Remote Arc Starter Control Connector
Connector used only when the Optional Remote Arc
Starter is installed. Connection for the control cable
between the Power Supply and the Remote Arc
Starter.
7. Control Cable Connector
Connector is no longer used. Use connector located on
Rear Panel.
E. Rear Panel
1. PLASMA Gas Input Fitting
1/4 NPT female gas fitting used to supply the plasma gas
to the system.
2. SECONDARY Gas Input Fitting
1/4" NPT female gas fitting used to supply the sec-
ondary gas to the system.
3. 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.
4. Coolant Reservoir and Filler Cap
The coolant reservoir supplies the system with cool-
ant to cool the torch parts during operation. The
maximum capacity of the reservoir is two gallons of
coolant.
Inside the reservoir, in the filler neck, is a basket and
a deionizer bag. The bag removes charged particles
from the coolant after it is returned to the reservoir
and prevents the coolant from becoming conductive.
If the coolant in the reservoir breaks down because
of these charged particles then the coolant must be
replaced.