Safety Precautions Electric Shock can Kill

A-2	INSTALLATION	A-2

Read entire Installation Section before installing the PRO-CUT 25.

SAFETY PRECAUTIONS

WARNING

ELECTRIC SHOCK CAN KILL.

•Only qualified personnel

should install this machine.

•Turn the input power OFF at the disconnect switch or fuse box and discharge input capacitors before working inside the equipment.

•Do not touch electrically hot parts.

•Turn the PRO-CUT Power Switch OFF when connecting power cord to input power.

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SELECT PROPER LOCATION

Place the PRO-CUT 25 where clean cool air can freely circulate in and out the side louvers. Dirt, dust or any foreign material that can be drawn into the machine should be kept at a minimum. Failure to observe these precautions can result in excessive operating temperatures and nuisance shutdown of the machine.

A source of clean, dry air or nitrogen must be supplied to the PRO-CUT 25. Oil in the air is a severe problem and must be avoided. The supply pressure must be between 80 and 150 psi. The flow rate is approximate- ly 4.0 cfm (113 l/min.). Failure to observe these pre- cautions could result in excessive operating tempera- tures or damage to the torch.

STACKING

The PRO-CUT 25 cannot be stacked.

TILTING

The PRO-CUT 25 must be placed on a stable, level surface so it will not topple over.

HIGH FREQUENCY INTERFERENCE PROTECTION

The PRO-CUT 25 employs a touch start mechanism for arc initiation which eliminates high frequency emis- sions from the machine as compared with spark gap and solid state type high frequency generators. Keep in mind, though, that these machines may be used in an environment where other high frequency generat- ing machines are operating. By taking the following steps, high frequency interference into the Pro-Cut can be minimized

(1)Make sure the power supply chassis is connected to a good earth ground. The work terminal ground does NOT ground the machine frame.

(2)Keep the work ground clamp isolated from other work clamps that have high frequency.

(3)If the ground clamp cannot be isolated, then keep the clamp as far as possible from other work clamp connections.

(4)When the machine is enclosed in a metal building, several good earth driven electrical grounds around the periphery of the building are recom- mended.

Failure to observe these recommended installation procedures may cause improper function of the Pro- Cut or possibly even damage to the control system or power supply components.

INPUT ELECTRICAL

CONNECTIONS

The PRO-CUT 25 is rated for 115VAC or 230VAC inputs and will automatically reconnect for the sup- plied voltage. The machine is shipped from the factory for operation on 115VAC 15 amp circuits. Use on 15 amp branch circuits will limit cutting output as indicat- ed by the graphics around the output knob. If the out- put is set at 20 amps or greater, the input fuse or cir- cuit breaker may “blow” in roughly 30 seconds or less (depending on fuse or circuit breaker type).

To achieve 20 amp output with 115VAC input, replace the 15 amp plug on the input cord with the supplied 20 amp plug, and connect the unit to a 20 amp branch circuit with super lag fuses (or equivalent breaker). To install the supplied 20 amp plug: Connect the white (neutral) wire under terminal clamp with silver screw, and black (hot) wire under terminal clamp with brass screw. Connect green wire under terminal clamp with green screw. Tighten terminal wire clamp screws

PRO-CUT 25

INSTALLATION