Manual 0-2844 4-3 OPERATION
4.03 Preparations For Operating
This procedure should be followed at the beginning of
each shift:
WARNING
Disconnect primary power at the source before as-
sembling or disassembling power supply, torch
parts, or torch and leads assemblies.
A. Torch Parts Selection
Check the torch for proper assembly and appropriate
front end torch parts. The torch parts (shield cup, tip,
gas distributor, and electrode) must correspond with
the type of operation (cutting or gouging). Refer to
the torch manual for proper parts selection.
B. Check Primary Input Power Source
1. Check the power source for proper input voltage.
Make sure the input power source meets the power
requirements for the unit per subsection 2.03-A,
Specifications/Design Features.
2. Connect the input power cable (or close the main
disconnect switch) to supply power to the system.
C. Gas Selection
Select desired single gas supply. Make sure gas source
meets requirements (refer to subsection 3.06, Gas Re-
quirements). Check connections and turn gas supply
on.
D. Work Cable Connection
Check for a solid work cable connection to the work-
piece.
E. Torch Connection
Check that the torch is properly connected.
F. Power On
On the Power Supply place the ON/OFF switch to
the ON (up) position.
G. Select Current Output Level
On the Control Panel, set the desired current output
level.
H. Set Operating Pressure
Place the RUN/SET switch to the SET (down) posi-
tion. Gas will flow. Adjust gas pressure control to 70
psi / 4.8 bar.
I. Prepare to Cut
Return the RUN/SET switch to RUN (up) position.
Gas will not flow until the Torch Trigger is pressed.
The system is now ready for operation. Push the Torch
Trigger to start the pilot arc. There is a 2 second pre-
flow before the arc starts.
4.04 Sequence of Operation
The following is a typical sequence of operation for this
power supply. Refer to Appendix 2 for block diagram.
1. Close main power source disconnect switch.
a. AC power is available at the Power Supply.
2. Place RUN/SET switch to RUN (up) position.
3. Place the ON/OFF power switch on the front panel
of the Power Supply to ON (up) position.
a. AC Power Indicator blinks ON and OFF
for eight seconds then stays ON.
b. Fan turns on.
NOTE
Gas comes on if Torch Trigger is pressed (although
unit will not pilot until switch is released and re-
closed after the light stops blinking).
4. Place RUN/SET switch to SET (down) position.
a. Gas solenoid opens and gas flows to set pres-
sure. Gas Pressure Regulator/Filter Assembly
should be set to 70 psi / 4.8 bar.
b. GAS indicator turns ON.
NOTE
GAS Indicator will not come ON if the gas
pressure is set below 35 psi (2.4 bar) at the Gas
Pressure Regulator/Filter Assembly.
5. Place RUN/SET switch to RUN (up) position.
a. Gas flow stops.
b. GAS Indicator turns OFF.
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