Tweco CE Ultima 150 - Manual (Page 21)

Manual 0-2530 15 SECTION 3: INSTALLATION
3.06 Plasma and Shield Gas
Connections
The ULTIMA-150 Power Supply comes with two gas sup-
ply hoses. Plasma and shield gases are connected at the
rear of the ULTIMA-150 Power Supply unit.
NOTE
It is not recommended to supply both plasma and
shield gas from one (1) regulator via "Y" connec-
tions. It is an additional source for leaks and flow
rates of the gases can be impacted when one is
changed.
1. Connect the Plasma (black or no tape) and Shield
(yellow tape) gas supply hoses from the rear of the
unit to the gas supply regulators.
2. Set pressure regulators on gas cylinders at 35 psi
(245 kPa).
Plasma and Shield
Gas Connections
A-00819
Figure 3-4 Gas Connections
3. Plasma gas flows when the main power circuit
breaker is turned on. Gas flow rates are controlled
by the Plasma and Shield gas flow meters located
on the front panel. Gas flow rates typical for most
applications are:
Plasma Gas: 1 - 1.5 scfh (.6-.75 lpm)
Shield Gas: 15-20 scfh (8-10 lpm)
4. Shield gas can be selected to operate ON or OFF
when the pilot arc is off. For Shield gas ON, jumper
across TB1 pins 17 to 18.
3.07 Torch Connection
The PWH/M Quick Disconnect Torch connects directly to
the quick disconnect fitting labelled TORCH on the rear
panel of the ULTIMA-150 Power Supply.
Older model Thermal Arc torches can also be used with
the ULTIMA-150 but require the optional Quick Discon-
nect Adapter Kit to do so. See Section 6, Parts Replace-
ment for more information.
Quick
Disconnect
Receptacle
Note: Make sure ALL pins
are clean and dry before
making connection.
A-00820
Figure 3-5 Detail of Torch Quick Disconnect
WARNING
Make sure there is no moisture or coolant on the
Torch Quick Disconnect fittings. Use compressed
air to dry the receptacle and fittings before making
connections.
NOTE
For information on installing and operating plasma
welding torches, see the appropriate manual.