Miller Electric HF-251-2 Owner's Manual

HF-251D-1 And HF-251-2ProcessesDescriptionTIG (GTAW) WeldingOM-611 096 556V2012−02High Frequency Arc StarterVisit our website atwww.MillerWelds.com

OM-611 Page 6Il reste une TENSION DC NON NÉGLIGEABLE dansles sources de soudage onduleur UNE FOISl’alimentation coupée.D Arrêter les convertisseurs, d

OM-611 Page 7LES ACCUMULATIONS DE GAZrisquent de provoquer des blessuresou même la mort.D Fermer l’alimentation du gaz comprimé en casde non utilisati

OM-611 Page 8Les PIÈCES MOBILES peuventcauser des blessures.D Ne pas s’approcher des organes mobiles.D Ne pas s’approcher des points de coincementtels

OM-611 Page 92-5. Principales normes de sécuritéSafety in Welding, Cutting, and Allied Processes, ANSI Standard Z49.1,is available as a free download

OM-611 Page 10

OM-611 Page 11SECTION 3 − SPECIFICATIONS3-1. SpecificationsWeldingCircuit Rat-ingInput PowerCord WithPlugType Of Input Power Dimensions Weight115 Volt

OM-611 Page 12SECTION 4 − INSTALLATION4-1. Serial Number And Rating Label LocationThe serial number and rating information for this product is located

OM-611 Page 13! Turn off HF unit before mak-ing gas connectionsObtain gas cylinder and chain torunning gear, wall, or other station-ary support so cyl

OM-611 Page 14. The supplied cord with plugs is for use with CC or CC/CV welding power sources having the proper, matching 14-pin receptacle. Do not u

OM-611 Page 15sb7.1 5/94 − Ref. 098 957-D / Ref. S-0004-A / S-0750 / Ref. 141 127-B1 Operator Control ReceptacleRC1 (See Section 4-6)2 Keyway3 Plug4 T

Miller Electric manufactures a full lineof welders and welding related equipment.For information on other quality Millerproducts, contact your local M

OM-611 Page 16! Turn Off HF Unit and weldingpower source, and discon-nect input power beforemaking connections. Stopengine on welding genera-tors.NOTI

OM-611 Page 17Ref. 159 606-B / Ref. 149 354-A! Read and follow entire Sec-tion 8 about HF equipment be-fore installing unit.NOTICE − Direct Current

OM-611 Page 18SECTION 5 − OPERATIONRef. 098 956-D1 Power Switch2 Pilot Light3 High Frequency SelectorSwitch4 High Frequency Switch5 High Frequency Int

OM-611 Page 191 High Frequency IntensityControlUse control to change amount ofHF energy used to start and/ormaintain the arc. Set as low aspractical t

OM-611 Page 20SECTION 6 − MAINTENANCE & TROUBLESHOOTING3 MonthsORBlow OutOrVacuumInsideCleanAndTightenWeldTerminalsReplaceUnreadableLabels6 Months

OM-611 Page 21Ref. 098 956-G! Turn Off unit and welding pow-er source and disconnect inputpower before adjusting sparkgaps.Loosen screw on spark gap a

OM-611 Page 226-3. TroubleshootingTrouble RemedyUnit completely inoperative; Pilot lightOff.Secure input power cord plug in receptacle (see Section 4-

OM-611 Page 23SECTION 7 − ELECTRICAL DIAGRAMS130 555-DFigure 7-1. Circuit Diagram For 115 Volts Model

OM-611 Page 24140 903-EFigure 7-2. Circuit Diagram For 230 Volts Model

OM-61 1 Page 25SECTION 8 − HIGH FREQUENCY8-1. Welding Processes Requiring High Frequencyhigh_freq 5/10 − S-06931 High-Frequency VoltageTIG − helps a

TABLE OF CONTENTSSECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING 1...1-1. Symbol Usage 1...

OM-61 1 Page 268-3. Recommended Installation To Reduce HF Interference1 High-Frequency Source (weldingpower source with built-in HF orseparate HF uni

OM-611 Page 27SECTION 9 − SELECTING AND PREPARING A TUNGSTENFOR DC OR AC WELDINGgtaw_Phase_2011−06! Whenever possible and practical, use DC weld outp

OM-611 Page 28SECTION 10 − GUIDELINES FOR TIG WELDING (GTAW)2007−0410-1. Positioning The TorchRef. ST-161 892! Grinding the tungsten elec-trode produc

OM-611 Page 2910-2. Torch Movement During WeldingST-162 002-BTungsten Without Filler RodTungsten With Filler RodForm pool Tilt torch Move torch to fro

OM-611 Page 30SECTION 11 − PARTS LISTFigure 11-1. Complete Assembly (Part 1 of 2) (115V Model)098 955-L Part 1 of 2. Hardware is common andnot availab

OM-611 Page 31115VDescriptionPartNo.Dia.Mkgs.ItemNo.Figure 11-1. Complete Assembly (Part 1 of 2)ModelQuantity230V042388 0423872 206 108 SADDLE CLAMP A

OM-611 Page 32098 955-L Part 2 of 2. Hardware is common andnot available unless listed.1234567879101617181920252122242526272315131412Figure 11-2. Comp

OM-611 Page 33115VDescriptionPartNo.Dia.Mkgs.ItemNo.Figure 11-2. Complete Assembly (Part 2 of 2)ModelQuantity230V042388 0423871 SR3 035 704 RECTIFIER,

TM-216 869 Page 34 Dynasty 350/700, Maxstar 350/700Notes

Warranty Questions?Call1-800-4-A-MILLERfor your localMiller distributor.miller_warr 2012-01Your distributor also givesyou ...ServiceYou always get the

ORIGINAL INSTRUCTIONS − PRINTED IN USA  2012 Miller Electric Mfg. Co. 2012−01Miller Electric Mfg. Co.An Illinois Tool Works Company1635 West Spencer

OM-611 Page 1SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USINGsom 2011−107Protect yourself and others from injury — read, follow, and save these impo

OM-611 Page 2Welding produces fumes and gases. Breathingthese fumes and gases can be hazardous to yourhealth.FUMES AND GASES can be hazardous.D Keep y

OM-611 Page 31-3. Additional Symbols For Installation, Operation, And MaintenanceFIRE OR EXPLOSION hazard.D Do not install or place unit on, over, or

OM-611 Page 41-4. California Proposition 65 WarningsWelding or cutting equipment produces fumes or gaseswhich contain chemicals known to the State of

OM-611 Page 5SECTION 2 − CONSIGNES DE SÉCURITÉ − LIRE AVANT UTILISATIONfre_som_2011−107Pour écarter les risques de blessure pour vous−même et pour aut