b.Select and obtain proper tungsten electrode (see Table 6-2).

c.Prepare tungsten electrode according to Sec- tion 6-2, and insert into torch).

13.Turn on shielding gas and coolant, if applicable.

14.Rotate the GAS/COOLANT POSTFLOW time con- trol to the desired coolant-gas postflow time (see Section 4-4).

15.Depress the POWER switch on the welding power source to the ON position.

16.Connect the 115 volts ac plug from the TIG-Unit to its power supply, if applicable.

17.Begin welding.

5-2. SHIELDED METAL ARC WELDING WITH TIG- UNIT

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 Shielded Metal Arc Welding applica- tions, place the AMPERAGE switch in the PANEL posi- tion and the OUTPUT (CONTACTOR) switch in the ON position. At this point the AMPERAGE ADJUSTMENT control and AMPERAGE switch on the TIG-Unit are not functional.

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

3.Place the HIGH FREQUENCY switch in the OFF position (see Section 4-6).

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

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

6.Prepare for welding as follows:

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

b.Select and obtain proper electrode, and insert into electrode holder.

7.Depress the POWER switch on the welding power source to the ON position.

8.Connect the 115 volts ac plug from the TIG-Unit to its power supply if applicable.

9.Begin welding.

5-3. SHUTTING DOWN

1.Stop welding.

2.Allow the unit to idle for three minute with no load applied.

3.Depress the POWER switch on the welding power source to the OFF position.

4.Disconnect the 115 volts ac plug from its power sup- ply, if applicable.

5.Turn off the shielding gas and coolant supply if appli- cable.

WARNING: HIGH CONCENTRATION OF SHIELDING GAS can harm health or kill.

•Shut off gas supply when not in use.

SECTION 6 – MAINTENANCE & TROUBLESHOOTING

6-1. ROUTINE MAINTENANCE (Table 6-1)

IMPORTANT: Every six months inspect the labels on this unit for legibility. All precautionary labels must be maintained in a clearly readable state and replaced when necessary. See Parts List for part number of precautionary labels.

WARNING: ELECTRIC SHOCK can kill.

• Do not touch live electrical parts.

•Shut down welding power source, and dis- connect input power employing lockout/tagging procedures before inspecting, maintaining, or servicing.

Lockout/tagging procedures consist of pad- locking line disconnect switch in open position, removing fuses from fuse box, or shutting off and red-tagging circuit breaker or other discon- necting device.

MOVING PARTS can cause serious injury.

•Keep away from moving parts.

HOT SURFACES can cause severe burns.

•Allow cooling period before servicing.

Maintenance to be performed only by qualified persons.

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Miller Electric KC237900 manual Maintenance & Troubleshooting, Shielded Metal ARC Welding with TIG- Unit, Shutting Down
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KC237900 specifications

The Miller Electric KC237900 is a standout model in the realm of welding technology, specifically designed for versatility and efficiency. This machine embodies Miller's commitment to innovation and quality, making it a popular choice among professionals and hobbyists alike.

One of the main features of the KC237900 is its advanced inverter technology, which allows the unit to operate efficiently across a range of welding applications. This technology ensures that the welder maintains a stable arc for precision welding, even on thin materials. The inverter design also contributes to a lighter and more compact machine, enhancing portability without compromising on power.

The KC237900 supports multiple welding processes, including MIG, Flux-Cored, and Stick welding. This versatility makes it suitable for a variety of projects, from automotive repairs to intricate fabrication tasks. The machine’s ability to handle diverse materials, including steel, stainless steel, and aluminum, further expands its application scope.

Another characteristic of the Miller Electric KC237900 is its user-friendly interface. The digital display provides clear information on amperage and voltage settings, allowing welders to make quick adjustments as needed. Additionally, the intuitive control panel simplifies the operation, making it accessible to users with varying skill levels.

The arc technology integrated into the KC237900 contributes to its smooth and stable welding performance. The unit utilizes Miller's Auto-Set feature, which automatically adjusts parameters based on material thickness and type. This feature not only speeds up the setup process but also enhances the overall weld quality.

Durability is another key aspect of the KC237900. Built with robust materials, the machine is designed to withstand the rigors of job site conditions. Its protective features, such as thermal overload protection, ensure that the unit operates safely and efficiently.

In conclusion, the Miller Electric KC237900 is a high-performance welding machine that combines advanced inverter technology, versatility, and user-friendly features. With its ability to handle multiple welding processes and materials, along with its focus on reliability and ease of use, it stands out as an excellent choice for both experienced welders and newcomers to the trade. Whether for professional use or personal projects, the KC237900 delivers the performance and quality that Miller Electric is known for.
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