Tweco Thermal Arc TA 500 - Manual (Page 25)

Manual No 0-0470 2-5 Installation
25. Connect the plasma gas supply hose (BLACK) to
the plasma gas cylinder and the fitting on the rear
panel of the Control Console marked PLASMA GAS.
26. Connect the secondary gas (if used) supply hose
(YELLOW) to the secondary gas cylinder and
the fitting on the rear panel of the Control Con-
sole marked SECONDARY GAS.
NOTE
A typical 50-lb CO2 cylinder is capable of deliv-
ering 35 SCFH on a continuous basis. There-
fore, it may be necessary to manifold several cyl-
inders to obtain the required torch flow rate,
depending on the application and duty cycle.
27. If water shield will be used as the secondary,
connect secondary water supply hose (YEL-
LOW) to the water source and the rear panel of
the Supply Console marked SECONDARY WA-
TER SHIELD.
NOTE:
The water source must be capable of delivering a
minimum water pressure of 20 psi. This water
does not need to be deionized, but in water sys-
tems with an extremely high mineral content a
water softener is recommended.
Arc Starter
A box housing some of the Arc Starter components is
shipped separately. It must be mounted close to the
torch (usually on the torch lifter frame) and connected
to the torch leads. The 16-pin connector protruding
from the torch leads covering is connected to the end
of the box marked WHITE/YELLOW. The wire lead
color-coded RED is connected to the end of the box
marked RED. The wire lead color-coded GREEN is con-
nected to the end of the one marked GREEN.
M200 Torch
28. Check the torch to see that it is properly as-
sembled (refer to Section 4-1).
WARNING
Underwater cutting requires special insulated
torch parts. See Figure 5-10.
29. The torch is normally shipped attached to the
gas and water leads. If this is not the case, re-
fer to Section 4-1.
30. Remove the cover from the Supply Console.
31. Pass the torch leads and arc starter connector through
the larger plastic bushing on the rear panel of the
Supply Console.
32. The torch leads are color-coded. Attach them to the
appropriate (color-coded) fittings on the bulkhead
board. Connect the arc starter plug to the receptacle
marked ARC STARTER.
33. Replace the cover on the Supply Console and se-
cure.
Hi-flow Water Shield (Optional)
NOTE:
Refer to the instruction manual packed with the
Hi-Flow Water Shield for installation instruc-
tions.
34. Connect the Hi-Flow starter control cable to the
receptacle marked HI-FLOW WATER SHIELD
on the front panel of the Power Supply.
CAUTION
The 115 VAC power from the TA-500 Power
Supply is to operate the contactor of the Hi-
Flow Water Shield pump only. It will not oper-
ate the motor.
1000 Amp System (Two TA-500 Power
Supplies)
To connect two (2) TA-500 Power Supplies together for a
1000 amp system the first (master) unit is connected as de-
scribed in step 1 through 36. The second (slave) unit is
connected per steps 1 through 11 with the additional inter-
connecting step.
35. Connect the end of the Parallel Control cable color-
coded WHITE to the receptacle marked PARALLEL
RELAY on the front panel of the first (master) Power
Supply. Connect the end color-coded YELLOW/
ORANGE to the receptacle REMOTE PANEL CON-
TROL on the second (slave) unit.
NOTE:
There should be 2 negative (GREEN) cables
from each of the two Power Supplies to the Sup-
ply Console and 2 positive (RED) work cables
from each of the two Power Supplies to the work-
piece.
36. Inspect all connections to ensure that they are se-
curely made and tightened. Check that all covers
and panels are replaced and secured.