Tweco 15XC CE Merlin PAK - Manual (Page 38)

OPERATION 3 - 4 Manual 0-2529
3.2 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 Coolant Installation, page 2-9).
2. Check the torch for proper assembly (see Torch Main-
tenance, page 4-1). Install proper torch parts for the
application (see Torch Parts Selection, page 3-5).
3. Select the desired pre-flow, post-flow, and auto-restart
settings (see Machine Torch Operation, page 3-13). The
system is factory-set for normal auto-restart, which
allows the pilot arc to restart instantly when the cut-
ting 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 380/415 VAC
three-phase input voltage. Make sure the input power
is properly connected to the EMI input filter PC board
(see Electrical Connections, page 2-6). Connect primary
power to the system (close main disconnect switch or
plug unit in).
5. Select desired plasma and secondary (see Gas Selec-
tion, page 3-8). Make sure gas sources meet require-
ments (see Plasma and Secondary Connections, page
2-2). Check connections and turn plasma and secon-
dary 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 Cutting
Speeds (page 3-26).
8. Move the RUN/SET/PURGE switch to SET position.
Set plasma and secondary pressures (see Plasma and
Secondary Connections, page 2-2).
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