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4
3
Figure 4-5 Rear Panel With Optional Two Stage
Filter Installed
5. Optional Two Stage Air Line Filter
The optional filter will remove moisture and contami-
nants from the air stream when using compressed
air. The filter is capable of filtering to at least 5 mi-
crons.
4.04 Sequence Of Operation
The following is a typical sequence of operation for this
cutting system. Refer to Appendix II for a block dia-
gram.
1. Close main power source disconnect.
a. AC power is available at the Power Supply.
2. Place the ON/OFF power switch on the front panel
of the Power Supply to ON.
a. AC Power indicator LED blinks ON and OFF
for eight seconds then stays ON.
b. Fans turn on.
Manual 0-2700
Power Supply will not come ON if the gas pres-
sure is set below 45 psi (3.1 bar or 310 kPa) at the
Regulator Assembly.
3. Protect eyes and press or activate torch switch
4. After gas pre-flow (approximately 2 seconds)
1
5
5. Pilot arc is established
6. Move Torch within transfer distance of workpiece.
2
7. Complete cutting operation
If the torch is lifted from the workpiece, while still
having torch swicth activated, the main arc will
A-01691
stop and the pilot arc will automatically restart.
8. Release or deactivate the torch switch.
If torch is activated during post-flow, pilot arc will
immediately restart.
If torch is within 3/8 in (9.53mm) transfer dis-
tance of workpiece, main arc will transfer.
9. Gas will flow for 15 seconds (post-flow).
10. Place the ON/OFF power switch on the front
11. Place the main power disconnect to open.
19
NOTE
a. Gas pre-flows starts.
b. GAS indicator turns ON.
a. Power supply enabled.
b. Pilot relay closes.
a. Main arc transfer.
b. Pilot arc OFF.
NOTE
a. Main arc stops.
b. Pilot arc stops (power supply enable signal
removed).
NOTE
a. Gas solenoid closes
b. Gas flow stops.
panel of the unit to OFF
a. AC Power indicator turns OFF.
b. Fans turn OFF.
a. Main AC power is removed from the system.
OPERATION
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