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Welding System
Miller Electric
OM-494
manual
210 657-A
Models:
OM-494
1
51
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Troubleshooting
Specification
Install
Parts list
Electrical Diagrams
Symbol Usage
Connecting The Battery
Warranty
Maintenance
Rectifier Assembly
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210
657-A
OM-494
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Contents
Dual-Operator Engine Driven Welding Generator
Processes
Description
Visit our website at OM-494191 862P January
From Miller to You
Table of Contents
Options and Accessories Warranty
Arc Welding Hazards
Symbol Usage
Engine Hazards
Compressed Air Hazards
Radiation can cause interference
Principal Safety Standards
California Proposition 65 Warnings
EMF Information
LES Fumées ET LES GAZ peuvent être dangereux
Signification des symboles
− Consignes DE Sécurité − Lire Avant Utilisation
UN Choc Électrique peut tuer
LE Bruit peut affecter l’ouïe
LE Soudage peut provoquer un in- cendie ou une explosion
DES Particules Volantes peuvent blesser les yeux
DES Pièces Chaudes peuvent provoquer des brûlures graves
’AIR Comprimé peut provoquer des blessures
’EXPLOSION DE LA Batterie peut
DES Organes Mobiles peuvent provoquer des blessures
LA Chaleur DU Moteur peut pro- voquer un incendie
Information sur les champs électromagnétiques
Principales normes de sécurité
− Definitions
Symbols And Definitions
Description
− Specifications
Weld, Power, And Engine Specifications
Dimensions, Weights, And Operating Angles
Fuel Consumption
AC Generator Power
Reduce Duty Cycle Minutes
Exceeding duty cycle can damage unit and void warranty
Duty Cycle And Overheating
Overheating
Volt-Ampere Curves
CC/DC − Single Mode
CC/DC − Dual Mode
CV/DC Mode
Installing Welding Generator
− Installation
Charger
Activating The Dry Charge Battery
Do not overfill battery cells
Read and follow all instruc
Top View Tools Needed 1/2
Connecting The Battery
Installing Exhaust Pipe
Connect − Cable Last
Engine Prestart Checks
Fuel Do not use gasoline. Gaso Line will damage engine
Oil
Welder a Left Side Welder B Right Side
Safety Information For Connecting To Weld Output Terminals
Weld Output Terminals
Unexpected Weld Output can cause injury or fire
Do not exceed machine duty cycle
Welder a Left Side
Connect electrode holder cables to Elec- trode receptacles
Stop engine Do not exceed machine duty cycle
Switches are set correctly. See Section
Place optional Polarity switches in Re
Verse position when using CV weld re
When switch is in Straight position
Connect wire feeder cables to CV recep- tacles
Connect wire feeder cables to Negative − terminals
Be sure Process Selector switches are
Place optional Polarity switch in Re
Making Single Operator CC Weld Connections
Put terminals
Selecting Weld Cable Sizes
150 ft 200 ft 250 ft
350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m
Socket Information
Installing Ether Cylinder Optional Ether Starting Aid
After installing cylinder, wait at
Remote 14 Receptacle Information
Dual Operator Operation
Remote 14 Receptacle Connections
If light goes on, stop engine and check engine belt
− Operating the Welding Generator
Engine Controls
See -3for weld control descriptions
Weld Controls See Section
CV weld output for MIG is only available
Do not switch under load or with out- put on
Do not switch under load
Weld Control Descriptions See Section
− Operating Auxiliary Equipment
− Maintenance & Troubleshooting
Every 500 h
Every 100 h
Every 200 h
Every 250 h
Maintenance Label
Do not clean housing with air hose
Servicing Air Cleaner
By the warranty
To clean air filter
Servicing Fuel And Lubrication Systems
Cylinder
Adjusting Engine Speed
Weld/Power 1850
Servicing Optional Ether Starting Aid
Stop engine To check belt tension
To adjust belt tension
Checking And Replacing Alternator Belt
Max Tools Needed 11/16
Resetting Fan Belt Safety Shutdown
Reinstall cleanout plug Tools Needed 3/8
Inspecting And Cleaning Optional Spark Arrestor Muffler
Thermostats TP3 And TP4 Internal − Not Shown
Circuit Protection
Welding
Troubleshooting
Formers T5 thru T10, and control board PC1 or PC5
Factory Authorized Service Agent check main rectifier SR2
Factory Authorized Service Agent check main rectifier SR3
Repair or replace wire feeder
Engine
Generator Power
OM-494
Circuit Diagram For Welding Generator
− Electrical Diagrams
210 657-A
− RUN-IN Procedure
Wetstacking
Ment damage may occur
Ing run-in add oil if needed
Run-In Procedure Using Load Bank
4exceed duty cycle or equip- ment damage may occur
Check oil level frequently dur
From flammables
Run-In Procedure Using Resistance Grid
Procedure at less than
Bank/grid
Grounding Generator To Truck Or Trailer Frame
− Generator Power Guidelines
Has this symbol
Selecting Equipment
Use ground device as stated Electrical codes
Grounding When Supplying Building Systems
How Much Power Does Equipment Require?
Earth ground if supplying
Farm/Home Equipment Rating Starting Watts Running Watts
Approximate Power Requirements For Industrial Motors
Approximate Power Requirements For Farm/Home Equipment
Industrial Motors Rating Starting Watts Running Watts
Contractor Rating Starting Watts Running Watts
Approximate Power Requirements For Contractor Equipment
KVA/HP x HP x 1000 = Starting Amperage
Power Required To Start Motor
How Much Power Can Generator Supply?
Single-Phase Induction Motor Starting Requirements
Typical Connections To Supply Standby Power
Current Load Watts Amperes
Selecting Extension Cord Use Shortest Cord Possible
311 103 96−SEE -2 101 25−SEE FIG 910
− Parts List
4748 57−SEE FIG 78−SEE FIG
Item Dia Part Description Quantity Mkgs
189
Front Panel
Front Panel -1Item
Side Control Panels − Welder B Right Side Shown
Side Control Panels -1Item
Side Control Panels
Generator
Rectifier Assembly
OM-494
Page
Service
Your distributor also gives
Support
Your distributor and/or equipment manufacturer’s
To locate a Distributor or Service Agency visit
Miller Electric Mfg. Co
For assistance in filing or settling claims, contact
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