Miller NT 456 CC Owner's Manual
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Miller NT 456 CC Owner's Manual

Miller NT 456 CC Owner's Manual

Arc welding power source
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NT 456 CC/CV WCC
OM-237 492G
2014−05
Processes
Multiprocess Welding
Description
Arc Welding Power Source
File: Multiprocess

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Summary of Contents for Miller NT 456 CC

  • Page 1 OM-237 492G 2014−05 Processes Multiprocess Welding Description Arc Welding Power Source NT 456 CC/CV WCC File: Multiprocess Visit our website at www.MillerWelds.com...
  • Page 2 From Miller to You Thank you and congratulations on choosing Miller. Now you can get the job done and get it done right. We know you don’t have time to do it any other way. That’s why when Niels Miller first started building arc welders in 1929, he made sure his products offered long-lasting value and superior quality.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING ....... . . 1-1.

  • Page 5: Section 1 − Safety Precautions - Read Before Using

    SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING som 2013−09 Protect yourself and others from injury — read, follow, and save these important safety precautions and operating instructions. 1-1. Symbol Usage DANGER! − Indicates a hazardous situation which, if Indicates special instructions.
  • Page 6 D Remove stick electrode from holder or cut off welding wire at FUMES AND GASES can be hazardous. contact tip when not in use. D Wear body protection made from durable, flame−resistant material Welding produces fumes and gases. Breathing (leather, heavy cotton, wool). Body protection includes oil-free these fumes and gases can be hazardous to your clothing such as leather gloves, heavy shirt, cuffless trousers, high health.

  • Page 7: Additional Symbols For Installation, Operation, And Maintenance

    1-3. Additional Symbols For Installation, Operation, And Maintenance FIRE OR EXPLOSION hazard. MOVING PARTS can injure. D Do not install or place unit on, over, or near D Keep away from moving parts such as fans. combustible surfaces. D Keep all doors, panels, covers, and guards D Do not install unit near flammables.

  • Page 8: California Proposition 65 Warnings

    1-4. California Proposition 65 Warnings Welding or cutting equipment produces fumes or gases This product contains chemicals, including lead, known to which contain chemicals known to the State of California to the state of California to cause cancer, birth defects, or other cause birth defects and, in some cases, cancer.

  • Page 9: Section 2 − Consignes De Sécurité − Lire Avant Utilisation

    SECTION 2 − CONSIGNES DE SÉCURITÉ − LIRE AVANT UTILISATION fre_som_2013−09 Pour écarter les risques de blessure pour vous−même et pour autrui — lire, appliquer et ranger en lieu sûr ces consignes relatives aux précautions de sécurité et au mode opératoire. 2-1.
  • Page 10 D Ne pas raccorder plus d’une électrode ou plus d’un câble de D Avoir recours à des écrans protecteurs ou à des rideaux pour masse à une même borne de sortie de soudage. Débrancher le protéger les autres contre les rayonnements les éblouissements câble pour le procédé...

  • Page 11: Dangers Supplémentaires En Relation Avec L'installation, Le Fonctionnement Et La Maintenance

    DES PIECES DE METAL ou DES LES BOUTEILLES peuvent exploser si elles sont endommagées. SALETES peuvent provoquer des blessures dans les yeux. Les bouteilles de gaz comprimé contiennent du gaz sous haute pression. Si une bouteille est D Le soudage, l’écaillement, le passage de la endommagée, elle peut exploser.
  • Page 12 LES CHARGES ÉLECTROSTATI- RAYONNEMENT HAUTE QUES peuvent endommager les cir- FRÉQUENCE (H.F.) risque cuits imprimés. provoquer des interférences. D Établir la connexion avec la barrette de terre D Le rayonnement haute fréquence (H.F.) peut avant de manipuler des cartes ou des pièces. provoquer des interférences avec les équi- D Utiliser des pochettes et des boîtes antista- pements de radio−navigation et de com-...

  • Page 13: Proposition Californienne 65 Avertissements

    2-4. Proposition californienne 65 Avertissements Les équipements de soudage et de coupage produisent des Ce produit contient des produits chimiques, notamment du fumées et des gaz qui contiennent des produits chimiques plomb, dont l’État de Californie reconnaît qu’ils provoquent dont l’État de Californie reconnaît qu’ils provoquent des mal- des cancers, des malformations congénitales ou d’autres formations congénitales et, dans certains cas, des cancers.
  • Page 14 OM-237 492 Page 10...

  • Page 15: Section 3 − Definitions

    A complete Parts List is available at www.MillerWelds.com SECTION 3 − DEFINITIONS 3-1. Additional Safety Symbols And Definitions Some symbols are found only on CE products. Warning! Watch Out! There are possible hazards as shown by the symbols. Safe1 2012−05 Disconnect input plug or power before working on machine.

  • Page 16: Section 4 − Specifications

    A complete Parts List is available at www.MillerWelds.com SECTION 4 − SPECIFICATIONS 4-1. Serial Number And Rating Label Location The serial number and rating information for the power source is located on the front or the rear of the machine. Use the rating labels to determine input power requirements and/or rated output.

  • Page 17: Duty Cycle And Overheating

    A complete Parts List is available at www.MillerWelds.com 4-4. Duty Cycle And Overheating Duty Cycle is percentage of 10 min- utes that unit can weld at rated load without overheating. If unit overheats, thermostat(s) opens, output stops, and cooling fan runs. Wait fifteen minutes for unit to cool.

  • Page 18: Volt-Ampere Curves

    A complete Parts List is available at www.MillerWelds.com 4-5. Volt-Ampere Curves Volt-ampere curves show mini- mum and maximum voltage and amperage output capabilities of unit. Curves of other settings fall be- tween curves shown. A. CC Mode DC Current B. CV Mode DC Current va_curve1 −...

  • Page 19: Section 5 − Installation

    A complete Parts List is available at www.MillerWelds.com SECTION 5 − INSTALLATION 5-1. Selecting A Location Special installation may be required where gasoline or volatile liquids are present − see NEC Article 511 or CEC Section 20. Lifting Eye Movement Lifting Forks Use lifting eye or lifting forks to move unit.

  • Page 20: Tipping

    A complete Parts List is available at www.MillerWelds.com 5-2. Tipping Do not move or operate unit where it could tip. 5-3. 115 VAC Receptacle And Supplementary Protectors Turn power before connecting to receptacle. 115 V 15 A AC Receptacle RC15 Power is shared between RC15 and Remote 14 receptacle RC14 (see Section 5-7).

  • Page 21: Weld Output Terminals And Selecting Cable Sizes

    A complete Parts List is available at www.MillerWelds.com 5-4. Weld Output Terminals And Selecting Cable Sizes* NOTICE − The Total Cable Length in Weld Circuit (see table below) is the combined length of both weld cables. For example, if the power source is 100 ft (30 m) from the workpiece, the total cable length in the weld circuit is 200 ft (2 cables x 100 ft).

  • Page 22: Connecting Weld Output Cables

    A complete Parts List is available at www.MillerWelds.com 5-5. Connecting Weld Output Cables Tools Needed: 3/4 in. (19 mm) 803 778-B cable terminal and copper bar. Make Weld Cable Terminal Turn off power before connecting to sure that the surfaces of the weld cable weld output terminals.

  • Page 23: Remote 14 Receptacle Information

    A complete Parts List is available at www.MillerWelds.com 5-6. Remote 14 Receptacle Information Socket* Socket Information 24 volts AC. Protected by supplementary protector CB2. 24 VOLTS AC Contact closure to A completes 24 volts AC contactor control circuit. Output to remote control; +10 volts DC in MIG mode. REMOTE Remote control circuit common.

  • Page 24: Electrical Service Guide

    A complete Parts List is available at www.MillerWelds.com 5-8. Electrical Service Guide Failure to follow these electrical service guide recommendations could create an electric shock or fire hazard. These recommenda- tions are for a circuit sized for the rated output and duty cycle of the welding power source. In dedicated circuit installations, the National Electrical Code (NEC) allows the receptacle or conductor rating to be less than the rating of the circuit protection device.
  • Page 25 A complete Parts List is available at www.MillerWelds.com Notes OM-237 492 Page 21...

  • Page 26: Connecting 3-Phase Input Power

    A complete Parts List is available at www.MillerWelds.com 5-10. Connecting 3-Phase Input Power = GND/PE Earth Ground IMPORTANT Input Contactor L1 (U) L2 (V) L3 (W) GND/ PE Earth Ground Tools Needed: 3/8 in. 3/8 in. input3 2013−04 − 800 103-C / Ref. 801 116-A OM-237 492 Page 22...
  • Page 27 A complete Parts List is available at www.MillerWelds.com 5-10 Connecting 3-Phase Input Power (Continued) applicable, use lugs of proper amperage Connect input conductors L1, L2 and L3 to Installation must meet all National capacity and correct hole size. welding power source line terminals. and Local Codes −...

  • Page 28: Section 6 − Operation

    A complete Parts List is available at www.MillerWelds.com SECTION 6 − OPERATION 6-1. Controls 237 205-A Power Switch mote control. In the MIG, Pulsed MIG, and V- This allows the operator to use a very short Sense feeder (with WCC inactive) modes, a arc length without sticking the electrode.

  • Page 29: Meter Functions For Cc/Cv Models

    A complete Parts List is available at www.MillerWelds.com 6-2. Meter Functions For CC/CV Models The meters display the actual weld output values for approximately three seconds after the arc is broken. Mode Meter Reading At Idle 78.0 Scratch Start TIG Actual Volts (OCV) Preset Amps Lift-Arc TIG...

  • Page 30: Lift-Arc Tig Procedure For Cc/Cv Models

    A complete Parts List is available at www.MillerWelds.com 6-3. Lift-Arc TIG Procedure For CC/CV Models With Mode switch in the Lift-Arc TIG position, start an arc as follows: TIG Electrode Workpiece Touch tungsten electrode to work- piece at weld start point, hold electrode to workpiece for 1-2 seconds, and slowly lift electrode.

  • Page 31: Section 7 − Maintenance & Troubleshooting

    A complete Parts List is available at www.MillerWelds.com SECTION 7 − MAINTENANCE & TROUBLESHOOTING 7-1. Routine Maintenance Disconnect power before maintaining. Maintain more often during severe conditions. Δ = Repair n = Check Z = Change ~ = Clean l = Replace * To be done by Factory Authorized Service Agent Every Months...

  • Page 32: Voltmeter/Ammeter Help Displays

    A complete Parts List is available at www.MillerWelds.com 7-3. Voltmeter/Ammeter Help Displays All directions are in reference to the front of the unit. All circuitry referred to is located inside the unit. Help 0 Display Indicates a shorted thermistor in the transformer of the unit.

  • Page 33: Troubleshooting

    A complete Parts List is available at www.MillerWelds.com 7-4. Troubleshooting Trouble Remedy No weld output; unit completely inop- Place line disconnect device in On position (see Section 5-10). erative; pilot light PL1 off. Check for open line fuse(s), and replace if open (see Section 5-10). Check for proper input power connections (see Section 5-10).

  • Page 34: Section 8 − Parts List

    A complete Parts List is available at www.MillerWelds.com Trouble Remedy Tungsten electrode oxidizing and not Shield weld zone from drafts. remaining bright after conclusion of weld. Increase postflow time. Check and tighten all gas fittings. Properly prepare tungsten. Check for water in torch, and repair torch if necessary. See torch Owner’s Manual. Digital meter not working properly.
  • Page 35 A complete Parts List is available at www.MillerWelds.com Notes OM-237 492 Page 31...

  • Page 36: Section 9 − Electrical Diagram

    A complete Parts List is available at www.MillerWelds.com SECTION 9 − ELECTRICAL DIAGRAM Figure 9-1. Circuit Diagram For NT 456 CC/CV WCC Models OM-237 492 Page 32...
  • Page 37 A complete Parts List is available at www.MillerWelds.com 237 490-E OM-237 492 Page 33...
  • Page 38 Notes...
  • Page 39 Effective January 1, 2014 (Equipment with a serial number preface of ME or newer) This limited warranty supersedes all previous Miller warranties and is exclusive with no other guarantees or warranties expressed or implied. Warranty Questions? LIMITED WARRANTY − Subject to the terms and conditions below, 6 Months —...

  • Page 40: Options And Accessories

    Owner’s Record Please complete and retain with your personal records. Model Name Serial/Style Number Purchase Date (Date which equipment was delivered to original customer.) Distributor Address City State For Service Contact a DISTRIBUTOR or SERVICE AGENCY near you. Always provide Model Name and Serial/Style Number. Contact your Distributor for: Welding Supplies and Consumables Options and Accessories...

This manual is also suitable for:

Nt 456 cv wccNt 456 cc/cv wcc

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