Tweco 1000 Merlin(Sept1999) - Manual (Page 18)

INSTALLATION PROCEDURES 14 Manual 0-2731
CAUTION
The input power cable must not be modified in any
way as shielding is installed on the cable.
1. At the free end of the input power cable, cut back
the insulation on the individual wires approxi-
mately 1/8 - 3/16 inch (3-5 mm).
2. Connect the ends of the individual wires and shield
to a customer supplied plug or disconnect box per
the following (see NOTES):
• Brown wire to Line 1 (Live)
• Blue wire to Line 2 (Live)
• Black wire to Line 3 (Live)
• Yellow/Green wire to Ground (power ground)
• Cable shield to earth ground
NOTES
The shield braid on the free end of the input cable
must be connected to a solid earth ground with as
short a connection as possible at the plug or dis-
connect box. Refer to Subsection 3.07 for proce-
dures on installing an earth ground.
Make sure that the yellow/green wire is connected
to power line safety ground.
3.05 Gas Connections
The Power Supply provides the liquid cooling and gases
to support operation of the Liquid Cooled Maximizer 300
Torch.
NOTE
Refer to the Liquid Cooled Maximizer 300 Torch
Instruction Manual (Cat. No. 0-2710) for infor-
mation on plasma and secondary gas selection and
requirements.
The following are available gases that can be used with
the Liquid Cooled Maximizer 300 Torch:
Plasma Gases: Compressed Air, Oxygen (O2), Nitro-
gen (N2), or Argon/Hydrogen (Ar/H2)
Secondary Gases: Compressed Air, Oxygen (O2),
Nitrogen (N2), Carbon Dioxide (CO2), or Tap Water
Gas requirements vary depending on the application. The
gases are connected to the rear panel connections of the
power supply. Depending on the options installed and
the source of the gases will determine the installation of
filters and regulators.
This sub-section includes information for connecting the
gas supplies to the Power Supply. The information is
grouped in paragraphs for different types of gases and
options per the following:
A. Using Shop Air
B. Using High-Pressure Gas Cylinders
C. Using Plasma Shop Air and Secondary High-
Pressure Gas Cylinder
D. Using Water Secondary
Refer to the appropriate paragraph(s) for the desired ap-
plication to be used.
A. Using Shop Air
NOTE
The Two Stage Air Line Filter Assembly is to be
used when using shop air as the Plasma Gas.
An inline pneumatic dryer/evaporator type air filter, ca-
pable of filtering particulates to at least 5 microns with a
dew point of 35°F (1.7°C), is required when using air from
a compressor. This type filter will insure that moisture,
oil, dirt, chips, rust particles, and other contminants from
the supply hose do not enter the torch. For highly auto-
mated applications, a refrigerated drier plus a particu-
late filter may be used to chill the air to remove all mois-
ture.
CAUTION
Excessive oil or moisture in compressed air will
reduce torch parts life and cutting performance and
may cause torch failure.
All Merlin 1000 Systems are supplied with a Two Stage
Air Line Filter attached to the rear of the Power Supply.
The following procedure is the recommended shop air
connection method:
Connect the air supply hose (see note) to the Air Line
Filter input port (IN) barb fitting and secure with a cus-
tomer supplied hose clamp.