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Miller Electric Big Blue 251D Fuel Consumption, Duty Cycle And Overheating, Continuous Welding

Models: Big Blue 251D

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4-3. Fuel Consumption

The curve shows typical fuel use under weld or power loads.

SB-137 487-A

4-4. Duty Cycle And Overheating

Duty Cycle is percentage of 10 min-

100% Duty Cycle At 250 Amperesutes that unit can weld at rated load without overheating.

Y Exceeding duty cycle can damage unit and void warranty.

Continuous Welding

rduty1 5/95 − SB-070 999-B

OM-480 Page 11

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Miller Electric Big Blue 251D manual Fuel Consumption, Duty Cycle And Overheating, Continuous Welding

Contents

Engine Driven Welding Generator ProcessesDescription Visit our website at OM-480128 576AC January From Miller to You Table of Contents Options and Accessories Warranty Arc Welding Hazards Symbol Usage Engine Hazards Compressed Air Hazards Radiation can cause interference Principal Safety StandardsCalifornia Proposition 65 Warnings EMF Information LES Fumées ET LES GAZ peuvent être dangereux Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation UN Choc Électrique peut tuer LE Bruit peut affecter l’ouïe LE Soudage peut provoquer un in- cendie ou une explosionDES Particules Volantes peuvent blesser les yeux DES Pièces Chaudes peuvent provoquer des brûlures graves ’AIR Comprimé peut provoquer des blessures ’EXPLOSION DE LA Batterie peutDES Organes Mobiles peuvent provoquer des blessures LA Chaleur DU Moteur peut pro- voquer un incendie Information sur les champs électromagnétiques Principales normes de sécurité − Definitions Symbols And Definitions − Specifications Weld, Power, And Engine SpecificationsDimensions, Weights, And Operating Angles Duty Cycle And Overheating Curve shows typical fuel use under weld or power loadsExceeding duty cycle can damage unit and void warranty Fuel Consumption Volt-Ampere Curves AC Generator Power Optional AC Power Plant Curves − Installation Installing Welding GeneratorConnecting The Battery Fuel Do not use gasoline. Gasoline Installing Muffler PipeEngine Prestart Checks Stop engine and let cool Connecting To Weld Output Terminals Installing Ether Cylinder Optional Ether Starting Aid Put terminals Selecting Weld Cable Sizes150 ft 200 ft 250 ft 350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m Controls See Section − Operating the Welding Generator Do not use Ether if engine is running Description Of Front Panel Controls See SectionRemote A/V Control Stop engine and fix trouble if either light goes on − Operating Auxiliary Equipment Volt Duplex And Optional Gfci ReceptaclesX 15 a + 120 V x 10 a = 3.0 kVA/kW OM-480 X 10 a + 120 V x 5 a = 3.0 kVA/kW Volt Duplex Receptacle Optional240 V 15 a AC Receptacle RC1 Circuit Breakers CB1 And CB2 Connecting Optional AC Power Plant 240 Volt Twistlock Receptacle Optional − Maintenance and Troubleshooting Maintenance Label Servicing Air Cleaner To replace secondary fuel filter Servicing Fuel And Lubrication SystemsTo change oil and filter To replace primary fuel filter Adjusting Engine Speed Standard ModelsModels With Automatic Idle Optional Full Empty Overload Protection Servicing Optional Ether Starting Aid Welding Inspecting And Cleaning Optional Spark ArrestorTroubleshooting Stop engine and let cool. Reinstall cleanout plug Maximum see Section Generator PowerCheck connections to ac power plant see Section Engine Circuit Diagram For Welding Generator − Electrical Diagram − RUN-IN Procedure WetstackingWelding Generator From flammables Do not Perform Run-In Procedure Using Load BankProcedure at less than Stop engine Do not touch hot exhaust Do not perform run-in Run-In Procedure Using Resistance GridBank/grid From flammables − Generator Power Guidelines Selecting EquipmentGrounding Generator To Truck Or Trailer Frame Amperes x Volts = Watts Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Earth ground if supplying Farm/Home Equipment Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Industrial Motors Rating Starting Watts Running Watts Contractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor Equipment KVA/HP x HP x 1000 = Starting Amperage Power Required To Start MotorHow Much Power Can Generator Supply? Single-Phase Induction Motor Starting Requirements Work like a Pro Typical Connections To Supply Standby Power Current Load Watts Amperes Selecting Extension Cord Use Shortest Cord Possible OM-480 116 − Parts List125 124 123 122 120 121 117 2526 126 Dia Part Description Quantity Mkgs 128 111 Panel, Front w/Components -1Item Panel, Front w/Components -1Item 111 Cont’d Generator Generator -1Item Includes 114Page Page Service Your distributor also givesSupport Your distributor and/or equipment manufacturer’s To locate a Distributor or Service Agency visitMiller Electric Mfg. Co For assistance in filing or settling claims, contact