SECTION 4 – INSTALLATION

4-1. Installing Welding Generator

Movement

YDo not lift unit from end.

OR

Airflow Clearance

18in

(460 mm)

 

18 in

18 in

(460 mm)

(460 mm)

 

18 in

18 in

(460 mm)

(460 mm)

 

YDo not weld on base. Weld- ing on base can cause fuel tank fire or explosion. Bolt unit down using holes pro- vided in base.

YAlways ground generator frame to vehicle frame to pre- vent electric shock and static electricity hazards.

1Generator Base

2Metal Vehicle Frame

3Equipment Grounding Terminal

4Grounding Cable

Use #10 AWG or larger insulated copper wire.

Location

OR

Grounding

3

Y If unit does not have GFCI re-

1

ceptacles,

use

GFCI-

4

GND/PE

protected extension cord.

OR

 

Electrically bond genera-

 

 

tor frame to vehicle frame

 

2

by metal-to-metal contact.

2

install1 12/99 – Ref. ST-800 652 / Ref. ST-800 477-A / ST-158 936-A / S-0854

4-2. Engine Prestart Checks

1/2 in

(13 mm)

Full

Full

Gasoline

Check all fluids daily. Engine must be cold and on a level surface. Unit is shipped with 10W30 engine oil.

.Follow run-in procedure in engine manual.

.This unit has a low oil pressure shut- down switch. However, some condi- tions may cause engine damage be- fore the engine shuts down. Check oil

level often and do not use the oil pres- sure shutdown system to monitor oil level.

1 Fuel

Add fresh fuel before starting engine the first time (see maintenance label for specifi- cations). Fill fuel tank up to 1/2 in. (13 mm) from top to allow room for expansion. Check fuel level on a cold engine before use each day.

Ref. ST-151 983 / ST-801 942-C / Ref. ST-800 395

2 Oil

After fueling, check oil with unit on level sur- face. If oil is not up to full mark on dipstick, add oil (see maintenance label).

.To improve cold weather starting:

Keep battery in good condition. Store battery in warm area off concrete surface.

Use correct grade oil for cold weather.

OM-486 Page 13

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Miller Electric 251 NT manual Installation, Installing Welding Generator, Engine Prestart Checks

251 NT specifications

The Miller Electric 251 NT is a highly regarded multi-process welding machine known for its versatility and advanced features, making it an ideal choice for professionals in various industries. With its robust construction and user-friendly interface, the 251 NT provides an efficient solution for MIG, TIG, and Stick welding applications.

One of the main features of the Miller Electric 251 NT is its impressive output range, which allows for welding on a variety of materials and thicknesses. It delivers up to 250 amps of power, enabling users to tackle both thin and thick metals with ease. Additionally, the machine is equipped with an Auto-Set feature, which automatically adjusts the welding settings according to the material thickness and type. This eliminates the guesswork, significantly enhancing productivity and reducing setup time.

Another noteworthy aspect of the Miller Electric 251 NT is its inverter technology. This advanced technology provides a compact, lightweight design without compromising performance. Inverter technology allows for greater energy efficiency, resulting in reduced operational costs over time. The 251 NT also features a Duty Cycle of 60% at 250 amps, which means it can handle demanding tasks while maintaining optimal performance.

The Miller Electric 251 NT is designed with user convenience in mind. The intuitive digital display offers clear visibility of the settings, allowing welders to make quick adjustments. Furthermore, the machine includes a built-in memory function to store frequently used parameters, enhancing workflow efficiency.

Safety is a key component of the 251 NT's design. It comes equipped with various safety features, including overload protection and a thermal overload warning system. These features ensure that the machine operates within safe limits, minimizing the risk of damage and ensuring longevity.

In terms of portability, the Miller Electric 251 NT's lightweight design and integrated handle make it easy to transport between job sites. The durable housing protects the internal components, making it suitable for rigorous use in demanding environments.

Overall, the Miller Electric 251 NT offers a combination of power, flexibility, and ease of use, making it a top choice for welders looking to enhance their capabilities across multiple welding processes. Whether in a professional shop or on a construction site, the 251 NT stands out as a reliable and efficient welding solution.