Tweco PAK 15XC - Manual (Page 36)

OPERATION 32 Manual 0-2251
4.2 PRE-OPERATION SET-UP
The pre-operation set-up procedure should be followed at
the beginning of each shift:
1. Check the coolant level indicator and add coolant if
necessary (see Section 3.6, Coolant Installation).
2. Check the torch for proper assembly (see Section 5.1,
Torch Maintenance). Install proper torch parts for the
application (see Section 4.3, Torch Parts Selection).
3. Select the desired pre-flow, post-flow, and auto-restart
settings (see Section 4.5, Plasma Cutting Operation).
The system is factory-set for normal auto-restart, which
allows the pilot arc to restart instantly when the cutting
arc is interrupted with the torch still activated. The
system is factory-set for two-second pre-flow and ten-
second post-flow.
4. Check the power source for proper three-phase input
voltage. Make sure the input power terminal board in
the power supply is set up for the available voltage
(see Section 3.4, Electrical Connections). Connect
primary power to the system (close main disconnect
switch or plug unit in).
5. Select desired plasma and secondary (see Section 4.4,
Gas Selection For Plasma Cutting). Make sure gas
sources meet requirements (see Section 3.3, Plasma and
Secondary Connections). Check connections and turn
plasma and secondary supplies on.
6. Move the ON/OFF switch to ON position. An auto-
matic forty second gas purge will let gas run to remove
any condensation that may have accumulated in the
torch and leads while the system was shut down. After
the purge is complete, if the RUN/SET/PURGE switch
is in SET position, gases will flow. If the switch is in
PURGE position plasma gas only will flow. If the
switch is in RUN position there will be no gas flow.
7. Select the desired current output level. Refer to Section
4.11, Cutting Speeds.
8. Move the RUN/SET/PURGE switch to SET position.
Set plasma and secondary pressures (see Section 3.3,
Plasma and Secondary Connections).
WARNING
Disconnect primary power to the system before
disassembling the torch, leads, or power supply.
Coolant Check
Torch Check
Optional Auto-Restart
Settings
Input Power Check
Plasma and Secondary
Supply Check
Line Purge
Output Selection
Plasma and Secondary
Pressure Settings