ESAB Cutmaster 120 - Operation Preparations and Checks; Torch Parts Selection and Connection

ESAB CUTMASTER 120
OPERATION Manual 0-5380
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 as-
semblies.
Torch Parts Selection
Check the torch for proper assembly and appropri-
ate 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
ESAB model SL100 / Manual or SL100 / Mechanical
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 volt-
age. Make sure the input power source meets
the power requirements 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.
Art # A-04509
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 cool-
ing 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.