Lincoln Electric DC-655 service manual Safety Precautions, Select Suitable Location

A-4 A-4

INSTALLATION

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Read this entire installation section before you start installation.

SAFETY PRECAUTIONS

INPUT

CONTACTOR (CR1)

INPUT POWER SUPPLY

CABLE WITH BUSHING

OR BOX CONNECTOR

RECONNECT

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WARNING

ELECTRIC SHOCK can kill.

•Only qualified personnel should perform this installation.

•Turn the input power OFF at the disconnect switch or fuse box before working on this equipment.

•Turn the Power Switch on the DC-655 “OFF” before connecting or disconnecting output cables, wire feeder or remote connections, or other equipment.

•Do not touch electrically hot parts.

•Always connect the Idealarc DC-655 grounding ter- minal (located on the welder near the reconnect panel) to a good electrical earth ground.

SELECT SUITABLE LOCATION

Place the welder where clean cooling air can freely cir- culate in through the front louvers and out through the rear louvers. Dirt, dust or any foreign material that can be drawn into the welder should be kept at a mini- mum. Failure to observe these precautions can result in excessive operating temperatures and nuisance shut-downs.

STACKING

The DC-655 may be stacked three-high provided the bottom machine is on a stable, hard, level surface. Be sure that the two pins in the roof fit into the slots in the base of the DC-655 above it.

TILTING

Do not place the machine on a surface that is inclined enough to create a risk of the machine falling over.

ELECTRICAL

INPUT CONNECTIONS

Before installing the machine check that the input sup- ply voltage, phase, and frequency are the same as the voltage, phase, and frequency as specified on the welder nameplate.

PANEL ASSEMBL Y

FIGURE A.1 - ELECTRICAL INPUT CONNECTIONS

Use input wire sizes that meet local electrical codes or see the Technical Specifications page in this manual.

Input power supply entry is through the hole in the Case Back Assembly. See Figure A.1 for the location of the machine’s input cable entry opening, Input Contactor (CR1), and reconnect panel.

FUSE AND WIRE SIZES

Protect the input circuit with the super lag fuses or delay type circuit breakers listed on the Technical Specifications page of this manual for the machine being used. They are also called inverse time or ther- mal/magnetic circuit breakers.

DO NOT use fuses or circuit breakers with a lower amp rating than recommended. This can result in “nui- sance” tripping caused by inrush current even when machine is not being used for welding at high output currents.

GROUND CONNECTION

Ground the frame of the machine. A ground

terminal marked with the symbol is located inside the case back of the machine near the input contactor. Access to the input box assembly is at the upper rear of the machine. See your local and national electrical codes for proper grounding methods. Use grounding wire sizes that meet local electrical codes or see the Technical Specifications page in this manual.

IDEALARC DC-655