Tweco PC250 User Manual download pdf (Page 12)

B. Extension Cords

Extension cords must meet National Electric Code guidelines. Extension cords must be rated for at least 20 amps and

must have three-prong plugs. Refer to the following table for recommended cord sizes:

Extension Cord Wire Gauge Requirements

Cord Length Wire Gauge

50 ft. (15.2 m) or less 12 gauge

100 ft. (30.5 m) 10 gauge

150 ft (45.7 m) 8 gauge

The primary power source, power cable, and plug all must conform to local electrical codes and

recommended circuit protection and wiring requirements.

Air supply must be free of oil, moisture, and other contaminants. Excessive oil and moisture

may cause double-arcing, rapid tip wear, or even complete torch failure. Contaminants may cause poor cutting per-

formance and rapid electrode wear. The air pressure regulator assembly integrated in the machine is also an adequate

filter and moisture trap.

FUNCTIONAL OVERVIEW

The Firepower PC250 Plasma Cutting System is designed to provide a plasma cutting system which can cut most

metals from gauge thickness up to 1/4 inch (6.4 mm).

OPERATING CONTROLS

1. ON/OFF Switch

ON position supplies AC power to activate

all system control circuits. OFF position

deactivates control circuits.

2. Green LED

After switching the unit on the green LED

blinks for 5 seconds indicating condensors are

in charge and the unit is getting ready for use.

After 5 seconds the LED remains on and the

unit is ready. The LED blinks for 3 seconds

after having pressed and released the torch

trigger. This is the time you have to press the

trigger again and initiate the arc. Slow blinking

green LED indicates that the unit is in over-

voltage. The LED blinks for 10 seconds then it

tests the line voltage for 2 seconds. If it is ok,

it remains on. If it is not ok, procedure repeats

until the voltage is ok.

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CAUTION

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CAUTION

Figure A Controls and Indicators

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Tweco PC250 User Manual Page 12