Miller Electric CST 250 VRD manual Table of Contents

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TABLE OF CONTENTS

SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING		1
1-1.	Symbol Usage	1
1-2.	Arc Welding Hazards	1
1-3.	Additional Symbols For Installation, Operation, And Maintenance	3
1-4.	California Proposition 65 Warnings	3
1-5.	Principal Safety Standards	4
1-6.	EMF Information	4
SECTION 2 − CONSIGNES DE SÉCURITÉ − À LIRE AVANT UTILISATION		5
2-1.	Signification des symboles	5
2-2.	Dangers relatifs au soudage à l’arc	5
2-3.	Autres symboles relatifs à l’installation, au fonctionnement et à l’entretien de l’appareil	7
2-4.	Principales normes de sécurité	8
2-5.	Information sur les champs électromagnétiques	8
SECTION 3 − INSTALLATION		9
3-1.	Specifications	9
3-2. Duty Cycle And Overheating		9
3-3. Stick (SMAW) Volt-Ampere Curves		10
3-4. TIG (GTAW) Volt-Ampere Curve		11
3-5.	Selecting A Location	12
3-6.	Weld Output Terminals And Selecting Cable Sizes*	13
3-7. TIG Lift-Arct DCEN (Direct Current Electrode Negative) Connections		14
3-8. Stick DCEP (Direct Current Electrode Positive) Connections		15
3-9.	Electrical Service Guide	15
3-10.	Selecting 220 Volts AC Single/Three Phase Input Voltage	16
3-11.	Selecting 400 - 440 Volts AC Three Phase Input Voltage	17
3-12.	Connecting Input Power	18
SECTION 4 − OPERATION		19
4-1.	Controls	19
4-2.	Process Select Control	20
4-3. Stick Start Procedure − Scratch Start Technique		21
4-4.	Lift-ArcE Start Procedure	21
4-5.	Amp Adjust Control	22
4-6.	Remote 14 Receptacle Information	22
4-7.	Fan-On-Demand	22
4-8.	Rack Mounting	22
SECTION 5 − MAINTENANCE AND TROUBLESHOOTING		23
5-1.	Routine Maintenance	23
5-2.	Blowing Out Inside Of Unit	23
5-3.	Troubleshooting	24
SECTION 6 − ELECTRICAL DIAGRAMS		26
SECTION 7 − SELECTING AND PREPARING
TUNGSTEN ELECTRODE		27
7-1.	Selecting Tungsten Electrode	27
7-2.	Safety Information About Tungsten	27
7-3.	Preparing Tungsten For AC Or DC Electrode Negative (DCEN) Welding	28
SECTION 8 − PARTS LIST		30
WARRANTY

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Contents OM-220 812B ProcessesDescription From Miller to You Table of Contents Page Electric Shock can kill Symbol UsageMarks a special safety message Arc Welding HazardsBuildup of GAS can injure or kill ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal can injure eyesCalifornia Proposition 65 Warnings Principal Safety Standards EMF InformationAbout Pacemakers LES Fumées ET LES GAZ peuvent être dangereux Signification des symboles− Consignes DE Sécurité − À Lire Avant Utilisation LES Décharges Électriques peuvent être mortellesLE Bruit peut affecter l’ouïe LE Soudage peut causer un incen- die ou une explosionLES Particules Projetées peu- vent blesser les yeux LES Pièces Chaudes peuvent cau- ser des brûlures gravesLES Pièces Mobiles peuvent cau- ser des blessures Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peut FairePrincipales normes de sécurité Information sur les champs électromagnétiquesConsignes relatives aux stimulateurs cardiaques − Installation SpecificationsDuty Cycle And Overheating DC Amps Stick Smaw Volt-Ampere CurvesTIG Gtaw Volt-Ampere Curve Dimensions And Weight Selecting a LocationLocation And Airflow Terminals Amperes Weld Output Terminals And Selecting Cable Sizes150 ft 200 ft 250 ft 350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 mPositive + Weld Output Terminal Input Voltage Electrical Service Guide50/60 Hz Single-Phase 50/60 Hz Three-Phase Stick Dcep Direct Current Electrode Positive ConnectionsSelecting 220 Volts AC Single/Three Phase Input Voltage Relinking Board Connection For 400 440 VAC Input Power Selecting 400 440 Volts AC Three Phase Input Voltage= GND/PE Connecting Input PowerFor three-phase operation For single-phase operationControls − OperationLift-ArctTIG Normal Process Select ControlApplication Stick Start Procedure − Scratch Start TechniqueLift-ArcStart Procedure Lift-Arc StartRack Mounting Amp Adjust ControlRemote 14 Receptacle Information Fan-On-DemandMonths − Maintenance and TroubleshootingRoutine Maintenance Blowing Out Inside Of UnitTrouble Possible Causes Remedy TroubleshootingUse proper size and type of weld cable see Section Circuit Diagram − Electrical DiagramsSafety Information About Tungsten − Selecting and Preparing Tungsten ElectrodeSelecting Tungsten Electrode Tungsten Electrode OM-220 812 Main Assembly − Parts ListCAPACITOR,ELCTLT 2400 UF 500 VDC can 2.5 DIA Panel, Front w/Components Panel, Rear w/Components Magnetics Subassembly Heat Sink Assembly, Output Diode Base Assembly Heat Sink Assembly, Input Page Support ServiceMiller Electric Mfg. Co Owner’s Record