Miller Electric Metro 250D manual Metro 250D, Table of Contents

Metro 250D

CALIFORNIA

Proposition 65

Warning

Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm.

Call

1-800-4-A-

Description

Multiple patented innovations put the new Metro 250D constant current welder/generator on the leading edge of engine-driven welding technology. Combining advanced design and outstanding DC stick and DC TIG characteristics, the Metro is an ideal machine for on-site work in construction, fabrication, repair, power generation, pipe welding, and rental markets as well.

Delivering 250 amps at 100% duty cycle (280 amps at 60%), the Metro has the muscle to handle tough assignments with the spare power needed for other equipment.

The Metro boasts an industrial, air-cooled, two-cylinder diesel engine that delivers 10 kVA/kW of auxiliary power and runs for at least 16 hours on one tank of fuel. The low noise case provides remarkably quiet operation, 99 LW(A) or 74 dB(A) at 23 ft (7 m), making the Metro 250D an excellent machine for work in noise-restricted locations.

Processes

Stick (SMAW) Welding

TIG (GTAW) Welding

With Optional Equipment:

Flux Cored (FCAW) Welding

The following terms are used interchangeably in this manual: TIG = GTAW, Stick = SMAW

Features

HNEW! Warranty extended to 3 years (engine warranted by engine manufacturer)

HVersatile weld output for DC Stick and DC TIG welding

HStepless amperage control for precise heat selection

HArc force control ensures a forceful arc for tight fit-ups − prevents electrode sticking

HBuilt-in Hot Start circuit for dependable arc starting

HRemote control receptacle permits remote current and contactor control

HPanel includes hour meter and fuel gauge

HEarth leakage protection for auxiliary power receptacles

HProduct features and specifications are subject to change without notice

Engine

HDeutz/Ruggerini RD 211 twin-cylinder diesel engine, 23 HP at 3600 RPM

HAir cooling eliminates radiators, belts, thermostats, coolant hoses, and antifreeze required in liquid-cooled engines

HAutomatic idle for fuel economy and reduced noise

HAutomatic shutdown system protects against low oil pressure

HLarge 12 gallon (45 L) fuel capacity

HTwo-year North American warranty from engine manufacturer

MILLER for your local Miller distri- butor.

Your distributor gives

you ...

Service

You always get the fast, reliable response you need. Most replacement parts can be in your hands in 24 hours.

Support

Need fast answers to the tough welding questions? Contact your distributor.

The expertise of the distributor and Miller is there to help you, every step of the way.

Table of Contents

Section		Page
1.	Safety Precautions	1
1.	Consignes de sécurité	5
2.	Definitions	9	Miller offers a Technical Manual
			which provides more detailed
3. Specifications		15	service and parts information for
			your unit. To obtain a Technical
4.	Installation	17	Manual, contact your local
			distributor. Your distributor can also
5. Operating the Welding Generator		21	supply you with Welding Process
			Manuals such as SMAW, GTAW,
6. Operating Auxiliary Equipment		23	GMAW, and GMAW-P.
7.	Maintenance & Troubleshooting	24	For practical information on welding,
			process applications, and Miller
8.	Electrical Diagram	34	products, visit our website at
			www.millerwelds.com
9. Run-In Procedure		36
10. Auxiliary Power Guidelines		39
11. Parts List		46
Options and Accessories
Warranty