Miller Electric 280 NT Description Of Engine Controls See Section, Cold Weather Engine Operation

Page 29

. A complete Parts List is available at www.MillerWelds.com

6-2. Description Of Engine Controls (See Section 6-1)

Engine Control Switch

Use switch to start engine, select speed, and stop engine. Use switch in combination with Engine Speed Control switch to select en- gine speed.

In Run/Idle 3600/2400 RPM position, engine runs at 2400 rpm no weld load and 3600 rpm under weld load.

In Run/Idle 3000/1800 RPM position, engine runs at 1800 rpm no weld load and 3000 rpm under weld load.

In either position, engine speed is deter- mined by weld load and position of Engine Speed Control switch.

.Generator power is available at recep-

tacles RC1 and RC2 only at 1800 rpm. If generator is not locked at 1800 rpm, engine speed increases in response to weld load and generator power output stops at receptacles RC1 and RC2. Generator power load does not affect engine speed.

Engine Choke Control

Use control to change engine air-fuel mix when starting engine.

To Start: pull out choke and turn Engine Control switch to Start position. Release switch and slowly push choke in when engine starts.

With Speed Control switch in Weld, the engine starts at 3000 rpm and remains there for two minutes. Engine speed then reduces to 2000 rpm.

The engine speed reduces from 3000 rpm to 2000 rpm when the Speed Control switch is toggled within the first two minutes of operation and no load is applied.

When an auxiliary power load is applied to 60 Hz receptacle RC1 or RC2, engine speed reduces to 1800 rpm.

.If the engine does not start, let the

engine come to a complete stop before attempting restart.

.During cold weather some gasoline en-

gines encounter difficulties that are easi- ly remedied. See Section 6-3and 8-7.

To Stop: turn Engine Control switch to Off position.

Engine Speed Control Switch

Use switch to control engine auto idle func- tion. Place switch in Generator Lock position when not welding to lock engine speed at 1800 rpm for generator power at 60 Hz ac re- ceptacles RC1 and RC2 (generator power is always available at 60−120 Hz receptacle RC3. See Section 7-2.)

Place switch in Weld position to allow engine speeds to be determined by position of En- gine Control switch. The Speed Control switch is not needed at start−up.

6-3. Cold Weather Engine Operation

 

 

1

Engine Control Switch

 

 

Carburetor Icing

1

Infrequently

Carburetor icing causes the unit to drop below the normal idle speed and then stall.

This condition occurs when the temperature is near freezing and the relative humid-

 

Loaded

ity is high. Ice forms on the throttle plate and inner bore of the carburetor. The engine

 

 

typically restarts without problems but soon stalls again.

 

 

S Treat gasoline with a fuel de−icer product (isopropyl alcohol).

 

 

S Place the Engine Control switch in the Run position.

 

 

S Run engine only when expecting to frequently load it.

 

 

Breather Icing

 

 

Oil breather/pulse line icing occurs in severe cold (continuously below 0_F). Mois-

 

 

ture accumulates in the oil from piston ring blow−by if the engine is extensively idled.

 

 

This may cause vacuum line freezing, oil breather tube freezing or ice in the carbure-

 

 

tor. All of these cause operating problems. Due to ice in the lines, the engine may

 

 

not restart until it is warmed to above freezing.

 

 

S Load engine and reduce idle times to prevent engine shutdowns.

 

 

S Use an electric fuel pump to avoid pulse line freezing.

 

Frequently

S Install engine cold−weather kit.

 

Loaded

Kohler offers a kit for cold weather operation. Contact engine manufacturer for kit

 

 

information (1-800-544-2444). The user can install these kits. The kit pulls heated

 

 

air from the muffler surface into the carburetor and shuts the cold air off. This in-

 

 

creases engine temperature during operation in both idle and high speed.

 

 

. When the ambient temperatures become warmer (above 45_F) the air flow will

 

 

 

have to be returned to normal.

 

 

 

Ref. 216 172

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Contents Processes OM-4430217 243RDescription File Engine DriveFrom Miller to You Table of Contents − Maintenance & Troubleshooting Arc Welding Hazards Symbol UsageElectric Shock can kill HOT Parts can cause severe burnsBuildup of GAS can injure or kill Fumes and Gases can be hazardousARC Rays can burn eyes and skin Welding can cause fire or explosionCompressed Air Hazards Engine HazardsHOT Parts can cause burns and injury Welding Wire can cause injuryFire or Explosion hazard Falling Unit can cause injuryCalifornia Proposition 65 Warnings Principal Safety StandardsEMF Information Radiation can cause interference− Consignes DE Sécurité − Lire Avant Utilisation Signification des symbolesUN Choc Électrique peut tuer Indique des instructions spécifiquesLE Soudage peut provoquer un in cendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures gravesLES Fumées ET LES GAZ peuvent être dangereux DES Organes Mobiles peuvent pro voquer des blessures LE Bruit peut affecter l’ouïe’EXPLOSION DE LA Batterie peu Risque D’INCENDIE OU D’EXPLO- Sion LA Chaleur DU Moteur peut pro- voquer un incendie’AIR Comprimé peut provoquer des blessures DES Organes Mobiles peuvent provoquer des blessures LE Surchauffement peut endom- mager le moteur électriqueLES Fils DE Soudage peuvent provoquer des blessures ’EMPLOI Excessif peutPrincipales normes de sécurité Proposition californienne 65 AvertissementsInformation EMF En ce qui concerne les implants médicaux− Definitions Symbol DefinitionsWeld, Power, And Engine Specifications − SpecificationsDimensions, Weights, and Operating Angles DescriptionFuel Consumption While Welding And Using Generator Power Dimensions For Units With Optional Running GearRPM Weld 1800 RPMAC Amperes Generator Power Curve100% Duty Cycle at 280 Amperes DC/CC TIG Mode Volt-Ampere CurvesDuty Cycle CV/DC MIG Mode Stick And MIG Mode Volt-Ampere CurvesCC/DC Stick Mode Installing Welding Generator − InstallationOil Engine Prestart ChecksReplacing The Battery Connecting Or Replacing The Battery+ − Connect negative − cable lastStop engine and let cool Installing Exhaust PipeTools Needed 1/2 Stop engine Connecting To Weld Output TerminalsFailure to properly connect Damage your machineRemote Receptacle Information Selecting Weld Cable SizesFront Panel Controls − Operating Welding GeneratorCold Weather Engine Operation Description Of Engine Controls See SectionInfrequently LoadedControlling Engine Speed And Weld/Generator Output Process Switch Settings Process SwitchWire Position Stick PositionsTIG Lift-ArcStart Procedure Stick Start Procedure − Scratch Start TechniqueLift-Arc t TIG TIG Electrode WorkpieceMin 20 a DC Remote Voltage/Amperage ControlConnect Remote Set Process Stick Welding OnlyControlling Engine Speed And Weld/Generator Power Output Hz Generator Power Receptacles And Supplementary Protectors− Operating Auxiliary Equipment Extension cordRized Service Agent Variable Frequency Hz Generator Power Receptacle RC3Press button to reset. If supple Receptacle Current Available in AmperesRoutine Maintenance − Maintenance & Troubleshooting100 200Maintenance Label Servicing Optional Spark Arrestor Servicing Air CleanerChanging Engine Oil, Oil Filter, And Fuel Filter Open left side door Overload ProtectionTrouble Remedy TroubleshootingWelding Variable Frequency Generator Power Receptacle RC3 Hz Generator Power Receptacles RC1 And RC2Check receptacle wiring and connections Necessary partsEngine Engine starts but stops when EngineCheck engine charging system according to engine manual Od of timeRecommended Spare Parts − Parts ListRecommended Spare Parts Circuit Diagram For Welding Generator Models − Electrical Diagrams232 961-A Selecting Equipment − Generator Power GuidelinesGrounding Generator To Truck Or Trailer Frame Electrically Bond GeneratorHow Much Power Does Equipment Require? Grounding When Supplying Building SystemsUse ground device as stated in electrical codes Amperes x Volts = WattsApproximate Power Requirements For Farm/Home Equipment Approximate Power Requirements For Industrial MotorsIndustrial Motors Rating Starting Watts Running Watts Farm/Home Equipment Rating Starting Watts Running WattsContractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor EquipmentHow Much Power Can Generator Supply? Power Required To Start MotorSingle-Phase Induction Motor Starting Requirements KVA/HP x HP x 1000 / Volts = Starting AmperageTypical Connections To Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible SOCKET/WRENCH Selection Table Standard Metric Welding Symbols Page Page Support ServiceYour distributor also gives Miller Electric Mfg. Co To locate a Distributor or Service Agency visitFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s
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