Miller Electric Big Blue 251D Run-In Procedure Using Resistance Grid, Bank/grid, From flammables

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10-3. Run-In Procedure Using Resistance Grid

		Y	Stop engine.
		Y Do not touch hot exhaust
			pipe, engine parts, or load
			bank/grid.
6		Y Keep exhaust and pipe away
6			from flammables.
			from flammables.
	2	Y Do not perform run-in
	2		procedure at less than 20
			volts weld output and do not
			exceed duty cycle or equip-
			ment damage may occur.
		1	Resistance Grid
		Use grid sized for generator rated
		output.
	1	Turn Off grid.
		2	Welding Generator
		Place A/V range switch in maxi-
		mum position, A/V control in mini-
		mum position, and Output Selector
		switch (if present) in either DC
		position.
		3	Weld Cables
		Connect grid to generator weld
		output terminals using proper size
		weld cables with correct connec-
		tors (polarity is not important).
		4	Voltmeter
		5	Clamp-On Ammeter
		Connect voltmeter and ammeter as
	5	shown, if not provided on generator.
3	5	Start engine and run for several
		minutes.

Set grid switches and then adjust generator A/V control so load equals rated voltage and current of the generator (see nameplate, rat-

4ing label, or the specifications sec- tion in this manual).

Check generator and meters after first five minutes then every fifteen

+minutes to be sure generator is loaded properly.

. Check oil level frequently dur- ing run-in; add oil if needed.

After one hour (minimum), place A/V control in minimum position, then shut down grid to remove load. Run engine several minutes at no load.

Y Stop engine and let cool.

6 Engine Exhaust Pipe

Repeat procedure if wetstacking is present.

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Contents Engine Driven Welding Generator ProcessesDescription Visit our website at OM-480128 576AC JanuaryFrom Miller to You Table of Contents Options and Accessories Warranty Arc Welding Hazards Symbol UsageEngine Hazards Compressed Air Hazards Radiation can cause interference Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationLES Fumées ET LES GAZ peuvent être dangereux Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation UN Choc Électrique peut tuerLE 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 incendieInformation 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 ConsumptionVolt-Ampere Curves AC Generator PowerOptional 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 coolConnecting To Weld Output Terminals Installing Ether Cylinder Optional Ether Starting AidPut 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 mControls See Section − Operating the Welding GeneratorDo 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 CB2Connecting 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 filterAdjusting Engine Speed Standard ModelsModels With Automatic Idle Optional Full Empty Overload Protection Servicing Optional Ether Starting AidWelding Inspecting And Cleaning Optional Spark ArrestorTroubleshooting Stop engine and let cool. Reinstall cleanout plugMaximum see Section Generator PowerCheck connections to ac power plant see Section EngineCircuit 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 exhaustDo 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 supplyingFarm/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 WattsContractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor EquipmentKVA/HP x HP x 1000 = Starting Amperage Power Required To Start MotorHow Much Power Can Generator Supply? Single-Phase Induction Motor Starting RequirementsWork like a Pro Typical Connections To Supply Standby PowerCurrent Load Watts Amperes Selecting Extension Cord Use Shortest Cord PossibleOM-480 116 − Parts List125 124 123 122 120 121 1172526 126 Dia Part Description Quantity Mkgs 128 111 Panel, Front w/Components -1ItemPanel, 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