Miller Electric CST 250 VRD manual Operation, Controls

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SECTION 4 − OPERATION

4-1. Controls







2	5	3	4

CST 250 VRD

NOTE: Green on nameplate indicates a TIG function, Gray indicates a Stick function.

1 Power Switch

Use switch to turn unit and indicator light On/Off.

2 Output Indicator Light

When unit is first energized this indicator light flashes several times and then illuminates continuously. When unit is shut down, the indicator light flashes several times and the cooling fan will run briefly, then both will turn off completely.

3Process Select Control See Section 4-2.

4Amp Adjust Control See Section 4-5.

5High Temperature Shutdown Light

When unit is first energized this indicator light illuminates for approximately 1 second to provide visual confirmation that the light is functioning properly (see Section 3-2).

6 Remote 14 Receptacle

220 685-A / 803 080

OM-220 812 Page 19

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Contents Description OM-220 812BProcesses 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 About Pacemakers Principal Safety StandardsEMF Information 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 FaireConsignes relatives aux stimulateurs cardiaques Principales normes de sécuritéInformation sur les champs électromagnétiques Duty Cycle And Overheating − InstallationSpecifications DC Amps Stick Smaw Volt-Ampere CurvesTIG Gtaw Volt-Ampere Curve Location And Airflow Dimensions And WeightSelecting a Location 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 DiagramsSelecting Tungsten Electrode Safety Information About Tungsten− Selecting and Preparing 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