Miller Electric Big 40 WG manual Engine Starting Controls, To Start, Engine Indicator Lights

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5-2. Description Of Front Panel Controls For CC Models (See Section 5-1)

Engine Starting Controls

1 Magnetic Shutdown Switch

Use switch during start-up to bypass engine shutdown system. System stops engine if oil pressure is too low or coolant temperature is too high.

2Starting Aid (Engine Choke Control) Use control to change engine air-fuel mix.

3Engine Control Switch

Use switch to start engine, select engine speed, and stop engine.

In Run position, engine runs at weld/power speed. In Run/Idle position, engine runs at idle speed at no load and weld speed with load applied.

To Start:

.If engine does not start, let engine come to a complete stop before attempting re- start.

Pull Choke control out. Turn Engine Control switch to Start while pressing Shutdown switch. Release Engine Control switch when engine starts. Continue holding Shutdown switch until engine indicator lights go out. Push Choke control in.

To Stop: turn Engine Control switch to Off position.

Engine Indicator Lights

4 Battery Charging Light

Light goes on if engine alternator is not charg- ing battery. Engine continues to run.

YStop engine and fix trouble if Battery Charging light goes on.

5 Engine Temperature Light

Light goes on and engine stops if engine tem- perature is above 230 ° F (110° C).

YStop engine and fix trouble if Engine Temperature light goes on.

6 Engine Oil Pressure Light

Light goes on and engine stops if oil pressure is below 5 psi (34 kPa). Light goes on momen- tarily during start-up but goes out when en- gine reaches normal oil pressure.

YStop engine and fix trouble if Engine Oil Pressure light stays on after start- up.

7 Fuel Light

Fuel light is not active on this model.

8 Engine Hour Meter

Engine Gauges

.To read gauges and engine indicator lights with engine off, turn Engine Control switch to Run/Idle and press Magnetic Shutdown switch (see Section 8-10).

9 Fuel Gauge

Use gauge to check fuel level.

To check fuel level when engine is not run- ning, turn Engine Control switch to Run/Idle position and press Magnetic Shutdown switch.

10 Battery Voltmeter (Optional)

Use gauge to check battery voltage and moni- tor the engine charging system. The meter should read about 14 volts dc when the en- gine is running, and about 12 volts dc when the engine is stopped.

11Engine Coolant Temperature Gauge (Optional)

Normal temperature is 180 - 203° F (82 - 95° C). When equipped with gauge option, engine stops if temperature exceeds 220° F (104° C).

12 Engine Oil Pressure Gauge (Optional)

Normal pressure is 30 – 80 psi (207 – 552 kPa). When equipped with gauge option, en- gine stops if pressure is below 10 psi (69 kPa).

Weld Controls

.Max OCV Control Circuit: This unit has a max OCV control circuit that resets Am- perage Adjust control R1 to maximum when the arc breaks. When an arc is struck, weld output control returns to the R1 front panel or combination front panel/ remote control setting. The Amperage Adjust control adjusts amperage only when welding and does not adjust open- circuit voltage.

The max OCV circuit is disabled when the Stick/TIG Selection switch is in Scratch Start TIG position (see item 15).

13 Ampere Range Switch

YDo not switch under load.

Use switch to select weld amperage range. For most welding applications, use lowest

amperage range possible to help prevent arc outages.

14 Amperage Adjust Control

Control adjusts amperage within range se- lected by Ampere Range switch. Weld output would be about 153 A DC with controls set as shown (50% of 100 to 205 A).

.The numbers around the control are for reference only and do not represent an actual percentage value.

15 Stick/TIG Selection Switch

Use switch to disable the max OCV circuit and the arc drive (dig) circuit for scratch start TIG welding (see max OCV note under Weld Controls).

When switch is in the Stick position, the max OCV circuit resets Amperage Adjust Control R1 to maximum when the arc breaks.

Also in the Stick position, the arc drive (dig) circuit provides additional amperage during low voltage (short arc length conditions) to prevent “sticking” electrodes.

When switch is in Scratch Start TIG position, the max OCV and arc drive (dig) circuits are disabled and OCV changes when the control is adjusted.

16Amperage Adjust Switch And Remote Amperage Adjust Receptacle

Connect optional remote control to RC13 (See Section 4-10). Use switch to select front panel or remote amperage control. For re- mote control, place switch in Remote position and connect remote control to Remote Am- perage Adjust receptacle RC13 (see Sec- tions 4-10 and 5-3).

17 Polarity Switch (Optional)

YDo not switch under load.

Use switch to change weld output. Select ei- ther DC Electrode Positive (DCEP) or DC Electrode Negative (DCEN).

Weld Meters

18 DC Voltmeter (Optional)

Voltmeter displays voltage at the weld output terminals, but not necessarily the welding arc due to resistance of cable and connections.

19 DC Ammeter (Optional)

Ammeter displays amperage output of the unit.

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Contents OM-4405 ProcessesDescription From Miller to You Table of Contents Options and Accessories Warranty ARC Rays can burn eyes and skin Symbol UsageArc Welding Hazards Electric Shock can killEngine Hazards Engine Heat can cause fire Battery Explosion can BlindMoving Parts can cause injury Engine Exhaust Gases can killARC Welding can cause interference Principal Safety StandardsEMF Information Radiation can cause interferenceLES Fumé ES ET LES GAZ peuvent ê tre dangereux Signification des symbolesConsignes DE SÉ Curité Lire Avant Utilisation UN Choc É Lectrique peut tuerLE Bruit peut affecter l’ouïe LE Soudage peut provoquer un in- cendie ou une explosionDES Particules Volantes peuvent blesser les yeux DES PIÈ CES Chaudes peuvent provoquer des brû lures gravesLA Chute DE L’APPAREIL peut blesser DES Organes Mobiles peuvent provoquer des blessures’EXPLOSION DE LA Batterie peut LA Chaleur DU Moteur peut pro- voquer un incendieConsignes relatives aux stimulateurs cardiaques Principales normes de sé curitéInformation sur les champs é lectromagné tiques LE Soudage À L’ARC risque de provoquer des interfé rencesDefinitions SpecificationsSymbols And Definitions Weld, Power, And Engine SpecificationsVolt-Ampere Curves For CC Models Dimensions, Weights, And Operating AnglesVolt-Ampere Curves for CC/CV Models Stick ModeMIG Mode TIG ModeDuty Cycle And Overheating Fuel Consumption15 kVA/kW Three-Phase Auxiliary Power Plant No Weld Load AC Auxiliary Power CurveOptional AC Power Plant Curves 12 kVA/kW Single-Phase Auxiliary Power Plant No Weld LoadInstallation Installing Welding Generator See Sections 4-2Using Lifting Eye To Bolt Unit In Place Installing Exhaust PipeMounting Welding Generator Welding Unit In Place Bolting Unit In PlaceCharger Activating The Dry Charge Battery If ApplicableDo not overfill battery cells Read and follow all instrucConnect Negative Cable Last Connecting The BatteryOil Coolant Recovery TankEngine Prestart Checks FuelSelecting Weld Cable Sizes Connecting To Weld Output TerminalsRef 862-A / 048 720-K / 802 Socket Information Connecting To Remote 14 Receptacle RC14 On CC/CV ModelsFront Panel Controls For CC Models See Section Operating Welding Generator CC ModelsTo Start Engine Indicator LightsDo not switch under load Engine Starting ControlsRemote Amperage Control On CC Models Optional OM-4405 Front Panel Controls For CC/CV Models See Section Operating Welding Generator CC/CV ModelsVoltage/Amperage Adjust Switch And Remote 14 Receptacle Use switch to select weld amperage rangeRunning Process/Contactor Switch On CC/CV ModelsProcess/Contactor Switch Settings Process/Contactor SwitchSet Remote Remote Voltage/Amperage Control On CC/CV Models OptionalSet Remote Set Range ProcessVolt And 240 Volt Receptacles Operating Auxiliary EquipmentSingle-Phase Power Connection Single-Phase Auxiliary Power Three-Phase Power ConnectionRear Of Panel Optional Auxiliary Power Receptacles 240 V 15 a AC South African Receptacle RC1Circuit Breaker CB2 Circuit Breaker CB3 Maintenance Label Maintenance & Troubleshooting250 h Routine Maintenance50 h 100 hStop engine and let cool Inspecting And Cleaning Optional Spark Arrestor Muffler500 h 1000 hServicing Air Cleaner Maximum Adjusting Engine Weld/Power SpeedAdjusting Engine Idle Speed Engine SpeedNo Load Tools Needed 1/2 Adjusting Governor SensitivityServicing Fuel And Lubrication Systems Overload Protection Press button to reset breaker20s Start Engine With No Load Applied Diagnosing Causes Of Engine Fault ShutdownsDiagnostic Checks While Running Fault ConditionWelding CC Models TroubleshootingRepair or replace wire feeder Welding CC/CV ModelsTacle see Section Standard Auxiliary Power Optional Auxiliary Power PlantEngine Or coolant temperature is too high see Sections 4-7 Wiring harness and componentsShutdown switch is released Out Ant temperature is too high see Sections 4-7OM-4405 Circuit Diagram For CC Welding Generator Electrical Diagrams201 991-A Circuit Diagram For CC/CV Welding Generator 201 992-A Auxiliary 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 Power Required To Start MotorHow Much Power Can Generator Supply? Single-Phase Induction Motor Starting RequirementsTypical Connections To Supply Standby Power Current Load Watts Amperes Selecting Extension Cord Use Shortest Cord PossibleOM-4405 Parts List 107 106 101 105 103CC only 104 -4 or See FIG 108Dia Part Description Dia Part Description Mkgs Quantity Control Box Assembly CC Models Control Box Assembly CC Models -1 Item Control Box Assembly CC/CV Models 177 CONN, body 5 terminal to engine control switch S1 193 Panel, Front w/Components CC Models MS1 Panel, Front w/Components CC/CV Models -1 Item Panel, Front w/Components CC/CV ModelsPC6 192 Generator Generator -1 Item Main Rectifier Assembly Service Your distributor also givesSupport Miller Electric Mfg. Co Owner’s Record

Big 40 WG specifications

The Miller Electric Big 40 WG is a versatile and powerful welding generator designed to meet the demands of professionals in the field. Known for its reliability and robust performance, the Big 40 WG is the ideal choice for those who require both welding capabilities and a portable power source.

One of the standout features of the Big 40 WG is its ability to produce a substantial output of up to 10,000 watts of continuous power. This ensures that users have enough capacity to run various tools and equipment, making it perfect for job sites where electricity may not readily be available. The generator is powered by a Kohler Command PRO engine, renowned for its durability and efficiency, ensuring that users can depend on its performance even in the toughest conditions.

The machine offers a dual capability for electric welding and stick welding, which enables users to tackle a variety of applications, from light maintenance tasks to heavy-duty industrial jobs. The Big 40 WG features an easy-to-use control panel, equipped with clear indicators and outputs that simplify operation. Whether you need to switch between welding modes or adjust settings, the intuitive design allows for quick responses and seamless operation.

In terms of technology and innovation, the Big 40 WG includes advanced features such as an automatic idle speed adjustment, which increases fuel efficiency and reduces wear on the engine. This technology not only helps save on fuel costs but also minimizes noise levels, providing a more pleasant working environment.

Another key characteristic of the Big 40 WG is its portability. Engineered with a lightweight frame and built-in lifting hooks, it is easy to transport and maneuver, making it an excellent choice for on-site work. The rugged construction ensures that the generator can withstand the rigors of outdoor use, enhancing its lifespan and reliability.

For those in search of a welding generator that delivers on performance, functionality, and portability, the Miller Electric Big 40 WG stands out as a preferred option. Its combination of powerful output, advanced technologies, and user-friendly features makes it a valuable tool for professionals across various industries, ensuring they can complete their jobs effectively and efficiently, no matter where they are.
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