Miller Electric CST 250 VRD Amp Adjust Control, Remote 14 Receptacle Information, Fan-On-Demand

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4-5. Amp Adjust Control

		1 AMP ADJUST (Amperage
	1	Control)
	1	Rotate knob clockwise to increase
		Rotate knob clockwise to increase
		amperage (5-250 amps).

4-6. Remote 14 Receptacle Information

This unit automatically senses when a remote control is connected to the remote 14 receptacle. After connecting a remote control, the unit will automatically adjust output control to a primary/secondary configuration. In this configuration, the AMP ADJUST control on the unit becomes the primary and sets the maximum amperage output of the unit. The remote control becomes the secondary and provides an amperage range adjustment of 0 to 100% based on the AMP ADJUST control setting.

A K		J I
B
C	L N	H
D	M	G
	E	F

803 080

	Socket*	Socket Information
	A	15 volts dc (not functional).
15 VOLTS DC
	B	Contact closure to A completes 15 volts dc
		contactor control circuit (not functional).
	C	Output to remote control; 0 to +10 volts dc.
REMOTE	D	Remote control circuit common.
OUTPUT
CONTROL	E	0 to +10 volts dc input command signal from
	E	0 to +10 volts dc input command signal from
		remote control.
GND	K	Chassis common.
GND

*The remaining sockets are not used.

4-7. Fan-On-Demand

This unit is equipped with Fan-On-Demand. The fan operates only when necessary to cool internal components. At power down, the fan will operate for a short period of time while the output indicator light is flashing.

4-8. Rack Mounting

This unit is capable of being rack mounted [see rack Owner’s Manual, OM-2238 (208 107)].

OM-220 812 Page 22

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Contents Description OM-220 812BProcesses From Miller to You Table of Contents Page Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can killFlying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or killCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information LES Décharges Électriques peuvent être mortelles Signification des symboles− Consignes DE Sécurité − À Lire Avant Utilisation LES Fumées ET LES GAZ peuvent être dangereuxLES Pièces Chaudes peuvent cau- ser des brûlures graves LE Soudage peut causer un incen- die ou une explosionLES Particules Projetées peu- vent blesser les yeux LE Bruit peut affecter l’ouïe’EMPLOI Excessif peut Faire Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser LES Pièces Mobiles peuvent cau- ser des blessuresConsignes relatives aux stimulateurs cardiaques Principales normes de sécuritéInformation sur les champs électromagnétiques Duty Cycle And Overheating − InstallationSpecifications Stick Smaw Volt-Ampere Curves DC AmpsTIG Gtaw Volt-Ampere Curve Location And Airflow Dimensions And WeightSelecting a Location 350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m Weld Output Terminals And Selecting Cable Sizes150 ft 200 ft 250 ft Terminals AmperesPositive + Weld Output Terminal Stick Dcep Direct Current Electrode Positive Connections Electrical Service Guide50/60 Hz Single-Phase 50/60 Hz Three-Phase Input VoltageSelecting 220 Volts AC Single/Three Phase Input Voltage Selecting 400 440 Volts AC Three Phase Input Voltage Relinking Board Connection For 400 440 VAC Input PowerFor single-phase operation Connecting Input PowerFor three-phase operation = GND/PE− Operation ControlsProcess Select Control Lift-ArctTIG NormalLift-Arc Start Stick Start Procedure − Scratch Start TechniqueLift-ArcStart Procedure ApplicationFan-On-Demand Amp Adjust ControlRemote 14 Receptacle Information Rack MountingBlowing Out Inside Of Unit − Maintenance and TroubleshootingRoutine Maintenance MonthsTroubleshooting Trouble Possible Causes RemedyUse proper size and type of weld cable see Section − Electrical Diagrams Circuit DiagramSelecting Tungsten Electrode Safety Information About Tungsten− Selecting and Preparing Tungsten Electrode Tungsten Electrode OM-220 812 − Parts List Main AssemblyCAPACITOR,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 Service SupportOwner’s Record Miller Electric Mfg. Co