Miller Electric KC237900 Sequence of Operation, Fumes and Gases can seriously harm your health

soon as an arc is struck, the spot weld timer begins tim- ing out. The remote contactor control switch must re- main closed throughout the entire spot welding time in- terval. If the remote contactor control switch is released prior to the completion of the spot weld cycle, spot weld output ceases and the spot weld timer will reset for the next cycle. After completion of the spot weld cycle, the remote contactor control switch must be released to re-

set the spot weld timer.

Whenever the SPOT TIME switch is in the ON position, the AMPERAGE switch on the TIG-Unit can be placed in either the PANEL or REMOTE position to suit the de- sired application. However, the OUTPUT (CONTAC- TOR) switch on the welding power source must be in the REMOTE position.

SECTION 5 – SEQUENCE OF OPERATION

WARNING: ELECTRIC SHOCK can kill; MOVING PARTS can cause serious injury;

IMPROPER AIRFLOW AND EXPOSURE TO ENVIRONMENT can damage internal parts.

•Do not touch live electrical parts.

•Keep all covers and panels in place while operating.

Warranty is void if the Tig-Unit is operated with any portion of the outer enclosure removed.

ARC RAYS, SPARKS, AND HOT SURFACES can burn eyes and skin; NOISE can damage hearing.

•Wear correct eye, ear, and body protection.

FUMES AND GASES can seriously harm your health.

•Keep your head out of the fumes.

•Ventilate to keep from breathing fumes and gases.

•If ventilation is inadequate, use approved breathing device.

HOT METAL, SPATTER, AND SLAG can cause fire and burns.

•Watch for fire.

•Keep a fire extinguisher nearby, and know how to use it.

•Do not use near flammable material.

•Allow work and equipment to cool before handling.

MAGNETIC FIELDS FROM HIGH CUR- RENTS can affect pacemaker operation.

•Wearers should consult their doctor before going near arc welding, gouging, or spot welding operations.

See Arc Welding Safety Precautions in the welding power source Owner’s Manual for basic welding safety information.

5-1. GAS TUNGSTEN ARC WELDING

WARNING: Read and follow safety informa- tion at beginning of entire Section 5 before proceeding.

1.Make all necessary connections as instructed in Section 4.

IMPORTANT: For Gas Tungsten Arc Welding applica- tions, place both the AMPERAGE and the OUTPUT

(CONTACTOR) switches on the welding power source in the REMOTE 14 position.

2.Connect the shielding gas supply hose to the side of the GAS valve labeled IN under the front access door (see Section 3-11).

3.Connect the coolant supply hose to the side of the COOLANT valve labeled IN under the front access door (see Section 3-12).

4.If remote control of any type (amperage, contactor, etc.) is desired, connect the remote control to the REMOTE receptacle under the front access door on the TIG-Unit. (See Section 3-10 and Figure 4-1.)

5.Place the GAS/COOLANT switch in the ON posi- tion (see Section 4-3).

6.Place the HIGH FREQUENCY switch in the ON po- sition and rotate the HIGH FREQUENCY control to the desired position (see Sections 4-6 and 4-7).

7.Place the POLARITY switch in the desired position (see Section 4-2).

8.Place the AMPERAGE switch in the desired posi- tion. Rotate the AMPERAGE ADJUSTMENT con- trol to the desired position (see Section 4-1).

9.If the unit is equipped with a Pulser, and the arc puls- ing function is desired, place the PULSES switch in the ON position and adjust the Pulser controls as in- structed in Sections 4-9 thru 4-12. If arc pulsing is not desired, place the PULSES switch in the OFF position.

10.If the unit is equipped with an Electroslope, and the sloping function is desired, place the ELECTRO- SLOPE switch in the ON position and adjust the Electroslope controls as instructed in Sections 4-14 thru 4-18. If sloping is not desired, place the Electro- slope switch in the OFF position.

IMPORTANT: If an Electroslope is used, the AMPER- AGE switch on the TIG-Unit must be in the PANEL posi- tion.

11.Wear dry insulating gloves and clothing, and wear welding helmet with proper filter lens according to ANSI Z49.1.

12.Prepare for welding as follows:

a.Connect work clamp to clean, bare metal at workpiece.

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