Tweco PAK 44G User Manual

Page 26

OPERATION

Manual 0-2686

6. SECONDARY GAS

Indicates pressure at which secondary gas is be-
ing supplied to the torch.

7. RUN/SET Switch (SW2)

Move up to RUN position for torch operation.
Move down to SET position for purging gas lines
and setting gas pressures with external regulators.

8. DC POWER Indicator (LT2)

Red light indicates that main contactor (W) has
closed to supply current to the main bridge recti-
fier and that gouging current is available.

9. ON/OFF Switch (SW1)

Move up to ON position to turn on pump and fan.
Move down to OFF position to turn off pump and
fan.

10. COOLANT

Indicates pressure at which coolant system is be-
ing run.

11. Torch Leads Insulating Boot

Insulates the torch leads from the sheet metal pre-
venting chafing of the leads.

12. REMOTE CURRENT CONTROL Connection

Connection for remote control of the output cur-
rent.

13. WORK Cable Connection

Plug type connection for the work cable.

14. Fuse 1FU

Fuse for the Pilot Arc circuit. This fuse is rated at
20 amps.

15. Fuse 2FU

Fuse for the current control bridge circuit. This
fuse is rated at 20 amps.

16. Fuse 3FU

Fuse for the 120 VAC relay logic circuit. This fuse
is rated at 5 amps.

B. Access Panel

1. Access Cover

Cover with interlock lever which allows access to
the Torch connections.

2. Interlock Lever

Disables the control circuit when Access Cover is
open.

3. Remote CONTROL Connection

Connection for remote control switch. Contact
closure activates gas and power circuits.

4. PLASMA (+) Gas Fitting

Connection used for the plasma, high frequency
and positive power for pilot leads of the torch.

5. SEC (Secondary) Gas Fitting

Connection used for the secondary lead of the
torch.

6. Coolant Return Fitting

Connection used for the coolant return lead of the
torch.

7. Coolant Supply (-) Fitting

Connection used for the negative (-)/coolant sup-
ply lead of the torch.

6. Positive (+) Fitting

Connection used for the positive (+)/coolant re-
turn/high frequency lead of the torch.

7. Negative (-) Fitting

Connection used for the negative (-)/coolant sup-
ply lead of the torch.

A-02102

Figure 4-2 Access Panel Area