Tweco A80 CutMaster - Manual (Page 32)

CUTMASTER A80
OPERATION Manual 0-4985 4-2
4.02 Preparations for Operation
At the start of each operating session:
WARNING
Disconnect primary power at the source before
assembling or disassembling power supply, torch
parts, or torch and leads assemblies.
Torch Parts Selection
Check the torch for proper assembly and appropriate torch
parts. The torch parts must correspond with the type of
operation, and with the amperage output of this Power
Supply (120 amps maximum). Refer to Section 4T.07 and
following for torch parts selection.
Torch Connection
Check that the torch is properly connected. Only Victor
Thermal Dynamics model SL100 / Manual or SL100 / Me-
chanical Torches may be connected to this Power Supply.
See Section 3T of this manual.
Check Primary Input Power Source
1. Check the power source for proper input voltage. Make
sure the input power source meets the power require-
ments for the unit per Section 2, Specifications.
2. Connect the input power cable (or close the main
disconnect switch) to supply power to the system.
Air Source
Ensure source meets requirements (refer to Section 2).
Check connections and turn air supply ON.
Connect Work Cable
Clamp the work cable to the workpiece or cutting table.
The area must be free from oil, paint and rust. Connect
only to the main part of the workpiece; do not connect to
the part to be cut off.
Power ON
Place the Power Supply ON / OFF switch to the ON (up)
position. AC indicator turns ON. Gas indicator
turns ON if there is sufficient gas pressure for power supply
operation and the cooling fans turn ON.
NOTE
Minimum pressure for power supply operation is
lower than minimum for torch operation.
The cooling fans will turn ON as soon as the unit
is turned ON. After the unit is idle for ten (10)
minutes the fans will turn OFF. The fans will come
back ON as soon as the torch switch (Start Signal)
is activated or if the unit is turned OFF, then turned
ON again. If an over temperature condition occurs,
the fans will continue to run while the condition
exists and for a ten (10) minute period once the
condition is cleared.
Set Operating Pressure
1. Place the Power Supply Function Control knob to the
SET position. Gas will flow.
2. For Standoff cutting, adjust gas pressure from 70 - 85
psi / 4.8 - 5.9 bar (LED's in center of control panel).
Refer to the Standoff chart for pressure setting details.