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Welding System
Big Blue 251D
Miller Big Blue 251D User Manual
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Processes
OM
-480
128 576AA
October 2002
Big
Blue
251D
Stick (SMA
W) Welding
Flux Cored (FCAW) With
V
oltage-Sensing Wire Feeder
With Optional Equipment:
Air Carbon Arc (CAC-A)
Cutting And Gouging
Engine Driven Welding Generator
Descrip
tio
n
2
Table of Contents
Default Chapter
3
Table of Contents
3
Section 1 - Safety Precautions - Read before Using
5
Symbol Usage
5
Arc Welding Hazards
5
Engine Hazards
6
Additional Symbols for Installation, Operation, and Maintenance
7
Compressed Air Hazards
7
Principal Safety Standards
8
EMF Information
8
Section 1 - Consignes de Sécurité - Lire Avant Utilisation
9
Signification des Symboles
9
Dangers Relatifs Au Soudage À L'arc
9
Dangers Existant en Relation Avec Le Moteur
10
Dangers Supplémentaires en Relation Avec L'installation, Le Fonctionnement Et la Maintenance
11
Principales Normes de Sécurité
12
Information Sur Les Champs Électromagnétiques
12
Section 2 - Definitions
13
Symbols and Definitions
13
Section 3 - Specifications
14
Weld, Power, and Engine Specifications
14
Dimensions, Weights, and Operating Angles
14
Fuel Consumption
15
Duty Cycle and Overheating
15
Volt-Ampere Curves
16
Ac Generator Power
16
Optional AC Power Plant Curves
17
Section 4 - Installation
18
Installing Welding Generator
18
Connecting the Battery
18
Installing Muffler Pipe
19
Engine Prestart Checks
19
Installing Ether Cylinder (Optional Ether Starting Aid)
20
Connecting to Weld Output Terminals
20
Selecting Weld Cable Sizes
21
SECTION 5 - Operating the Welding Generator
22
Controls (See Section 5-2)
22
Description of Front Panel Controls (See Section 5-1)
23
Remote A/V Control
23
Section 6 - Operating Auxiliary Equipment
24
Volt Duplex and Optional GFCI Receptacles
24
Volt Duplex Receptacle (Optional)
25
Connecting Optional Ac Power Plant
26
120/240 Volt Twistlock Receptacle (Optional)
27
Section 7 - Maintenance and Troubleshooting
28
Routine Maintenance
28
Maintenance Label
29
Servicing Air Cleaner
30
Servicing Fuel and Lubrication Systems
31
Adjusting Engine Speed
32
Overload Protection
33
Servicing Optional Ether Starting Aid
33
Inspecting and Cleaning Optional Spark Arrestor
34
Troubleshooting
34
Section 8 - Electrical Diagram
36
Section 9 - Run-In Procedure
37
Wetstacking
37
Run-In Procedure Using Load Bank
38
Run-In Procedure Using Resistance Grid
39
Grounding Generator to Truck or Trailer Frame
40
Grounding When Supplying Building Systems
41
Section 10 - Auxiliary Power Guidelines
48
Section 11 - Parts List
48
Options and Accessories
60
4
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Miller Big Blue 251D Specifications
General
Brand
Miller
Model
Big Blue 251D
Category
Welding System
Language
English
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