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Miller Electric
Metro 250D
manual
Electrical Diagram, Circuit Diagram for Welding Generator
Models:
Metro 250D
1
38
64
64
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Troubleshooting
Specifications
Install
Parts list
Electrical Diagram
Symbol Usage
Maintenance
Options and Accessories
Battery Explosion can Blind
Run-In Procedure
Page 38
Image 38
8.
Electrical Diagram
8.1
Circuit Diagram for Welding Generator
34
OM-402
Page 37
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Page 38
Image 38
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Page 39
Contents
Description
OM-402B
Processes
From Miller to You
Table of Contents
Metro 250D
Page
Arc Welding Hazards
Safety Precautions − Read Before Using
Symbol Usage
Engine Hazards
Engine Exhaust Gases can kill
Battery Explosion can Blind
Moving Parts can cause injury
Engine Heat can cause fire
Radiation can cause interference
Principal Safety Standards
EMF Information
ARC Welding can cause interference
UN Choc Électrique peut tuer
Signification des symboles
Consignes de sécurité − lire avant utilisation
LES Fumées ET LES GAZ peuvent être dangereux
DES Pièces Chaudes peuvent provoquer des brûlures graves
LE Soudage peut provoquer un in- cendie ou une explosion
DES Particules Volantes peuvent blesser les yeux
LE Bruit peut affecter l’ouïe
LA Chaleur DU Moteur peut pro- voquer un incendie
DES Organes Mobiles peuvent provoquer des blessures
’EXPLOSION DE LA Batterie peut
LA Chute DE L’APPAREIL peut blesser
Électrostatiques peuvent endommager les circuits imprimés
Principales normes de sécurité
Information sur les champs électromagnétiques
UNE Remorque QUI Bascule peut entraîner des blessures
Symbols and Definitions
Definitions
General Precautionary Label
Battery Charging Label
Fan and Moving Parts Label
Hot Muffler Label
Diesel Fuel Label
− 50 h Std
Falling Equipment Label
Activation Tag
Do Not Use Ether Label
Manufacturer’s Rating Label
Dimensions, Weights, and Operating Angles
Specifications
Weld, Power, and Engine Specifications
Volt-Ampere Curve
Fuel Consumption
Duty Cycle and Overheating
Installing Welding Generator
Installation
AC Auxiliary Power Curve
Location Grounding
Stop engine
Connecting Battery and Installing Exhaust Pipe
Engine Prestart Checks
Connect negative − cable last
100 ft 30 m or Less
Connecting to Weld Output Terminals
Selecting Weld Cable Sizes
10 − 60% 60 − 100% Duty 10 − 100% Duty Cycle
Socket Information
Remote 14 Receptacle RC1 Information
Ref. ST-158
Front Panel Controls
Using Idle Lock Switch
Operating the Welding Generator
Plug
Remote Amperage and Contactor Control
Auxiliary Power Receptacles
Operating Auxiliary Equipment
Maintenance & Troubleshooting
100 Hrs Maintenance
Changing Engine Oil and Oil Filter
Do not clean housing with air hose
Servicing Air Cleaner
To Clean air filter
Changing Fuel Filters
Weld/Power Speed Adjustment
Adjusting Engine Speed
Idle Speed Adjustment
Overload Protection
Weld And Auxiliary Power Circuits
Remote Control Circuit
Engine Control Circuit
Servicing Optional Spark Arrestor
Welding Troubleshooting
Stop engine and let cool. Reinstall cleanout plug
Trouble Remedy
Auxiliary Power Troubleshooting
Engine Troubleshooting
Ule
OM-402
Electrical Diagram
Circuit Diagram for Welding Generator
SC-181
Heavy loading during first
Run-In Procedure
Wetstacking
Run-In Procedure Using Load Bank
Load Bank
Run-In Procedure Using Resistance Grid
Grounding Generator to Truck or Trailer Frame
Auxiliary Power Guidelines
Selecting Equipment
Amperes x Volts = Watts
Grounding When Supplying Building Systems
How Much Power Does Equipment Require?
Industrial Motors Rating Starting Watts Running Watts
Approximate Power Requirements for Industrial Motors
Approximate Power Requirements for Farm/Home Equipment
Farm/Home Equipment Rating Starting Watts Running Watts
Approximate Power Requirements for Contractor Equipment
Contractor Rating Starting Watts Running Watts
Single-Phase Induction Motor Starting Requirements
Power Required to Start Motor
How Much Power Can Generator Supply?
KVA/HP x HP x 1000 = Starting Amperage Volts
Typical Connections to Supply Standby Power
Selecting Extension Cord Use Shortest Cord Possible
Current Load Watts Amperes
Parts List
Main Assembly
ST-801 488-A
11.1
PC6
CB9
Panel, Front w/Components .1 Item
11.2
CB5
Generator .1 Item
Control Box w/Components .1 Item
Diode Board
OM-402
Page
OM-402
Page
Options and Accessories
Metro 250D
Call Miller for your local Miller distributor
Owner’s Record
Miller Electric Mfg. Co