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Miller
Welding System
CST 280
Miller CST 280 User Manual
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Pro
cesses
Descrip
ti
on
Stick (SMAW
)
W
elding
OM
-258
035F
2015
−
08
Arc W
elding Power Source
CST
280
And
CST
280
VRD
W
ith
Meter
TIG (GT
A
W) W
elding
File:
Stick (SMA
W)
V
isit
our website at
www.MillerWelds.com
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
Additional Symbols for Installation, Operation, and Maintenance
7
California Proposition 65 Warnings
8
Principal Safety Standards
8
EMF Information
8
Section 2 − Consignes de Sécurité − Lire Avant Utilisation
9
Symboles Utilisés
9
Dangers Relatifs Au Soudage À L'arc
9
Dangers Supplémentaires en Relation Avec L'installation, Le Fonctionnement Et la Maintenance
11
Proposition Californienne 65 Avertissements
13
Principales Normes de Sécurité
13
Informations Relatives Aux CEM
13
Section 3 − Definitions
15
Additional Safety Symbols and Definitions
15
Miscellaneous Symbols and Definitions
15
Section 4 − Specifications
16
Serial Number and Rating Label Location
16
Unit Specifications
16
Environmental Specifications
17
Duty Cycle and Overheating
17
Stick (SMAW) Volt-Ampere Curves CST 280 Model
18
TIG (GTAW) Volt-Ampere Curve CST 280 Model
18
Stick (SMAW) Volt-Ampere Curves CST 280 VRD Model
19
TIG (GTAW) Volt-Ampere Curve CST 280 VRD Model
19
Section 5 − Installation
20
Selecting a Location
20
Weld Output Terminals and Selecting Cable Sizes
21
Weld Output Terminals
21
TIG Lift-Arct DCEN (Direct Current Electrode Negative) Connections
22
Stick DCEP (Direct Current Electrode Positive) Connections
22
Selecting 208 - 230 Volts AC Single/Three Phase Input Voltage
23
Selecting 400 - 575 Volts AC Three Phase Input Voltage
24
Electrical Service Guide
25
Connecting 1-Phase Input Power
26
Connecting 3-Phase Input Power
28
Section 6 − Operation
30
Controls
30
Process Select Control
31
Stick Start Procedure − Scratch Start Technique
31
Lift-Arc™ Start Procedure
32
Remote 14 Receptacle Information
32
Fan-On-Demand
32
Rack Mounting
32
Section 7 − Maintenance and Troubleshooting
33
Routine Maintenance
33
Blowing out Inside of Unit
33
Troubleshooting
34
Section 8 − Electrical Diagrams
38
Section 9 − Selecting and Preparing a Tungsten
40
For DC or Ac Welding with Inverter Machines
40
Selecting Tungsten Electrode (Wear Clean Gloves to Prevent Contamination of Tungsten)
40
Preparing Tungsten Electrode for DC Electrode Negative (DCEN) Welding
40
Or AC Welding with Inverter Machines
40
Section 10 − Guidelines for Tig Welding (Gtaw)
41
Torch Movement During Welding
42
Positioning Torch Tungsten for Various Weld Joints
42
Section 11 − Parts List
44
4
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Miller CST 280 Specifications
General
Amperage Range
5-280 A
Input Frequency
50/60 Hz
Process
Stick (SMAW)
Rated Output
280 A
Input Voltage
208 V / 230 V / 460 V / 575 V
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