Miller Electric MOG-250, MOG-300, MOG-350, MOG-Pak, MOG-400, RGC manual From Miller to You

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Miller is the first welding equipment manufacturer in the U.S.A. to be registered to the ISO 9001 Quality System Standard.

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. Like you, his customers couldn’t afford anything less. Miller products had to be more than the best they could be. They had to be the best you could buy.

Today, the people that build and sell Miller products continue the tradition. They’re just as committed to providing equipment and service that meets the high standards of quality and value established in 1929.

This Owner’s Manual is designed to help you get the most out of your Miller products. Please take time to read the Safety precautions. They will help you protect yourself against potential hazards on the worksite. We’ve

made installation and operation quick and easy. With Miller you can count on years of reliable service with proper maintenance. And if for some reason the unit needs repair, there’s a Troubleshooting section that will help you figure out what the problem is. The parts list will then help you to decide which exact part you may need to fix the problem. Warranty and service information for your particular model are also provided.

Miller Electric manufactures a full line

of welders and welding related equipment. For information on other quality Miller products, contact your local Miller distributor to receive the latest full line catalog or individual catalog sheets. To locate your nearest

distributor or service agency call 1-800-4-A-Miller, or visit us at www.MillerWelds.com on the web.

Working as hard as you do

–every power source from Miller is backed by the most hassle-free warranty in the business.

Miller offers a Technical Manual which provides more detailed service and parts information for your unit. To obtain a Technical Manual, contact your local distributor. Your distributor can also supply you with Welding Process Manuals such as SMAW, GTAW, GMAW, and GMAW-P.

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Contents
Description OM-808Processes From Miller to You Table of Contents Page Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can killFlying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or killPrincipal Safety Standards EMF Information About PacemakersUN Choc É Lectrique peut tuer Signification des symbolesConsignes DE Securite Lire Avant Utilisation LES Fumé ES ET LES GAZ peuvent ê tre dangereuxLE Bruit peut affecter l’ouïe LE Soudage peut provoquer un incendie ou une explosionDES Particules Volantes peuvent blesser les yeux ’EMPLOI Excessif peut Risque D’INCENDIE OULA Chute DE L’APPAREIL peut blesser DES Organes Mobiles peuvent provoquer des blessuresConsignes relatives aux stimulateurs cardiaques Principales normes de sé curitéInformation sur les champs é lectromagné tiques Grid Rack SpecificationsResistance Grid Installation Typical Multiple Operator System Component RelationshipsMulti-Grid Rack Turn Off welding power source Before moving grid or rackResistance Grid Tools Needed Weld Input/Output Cables For Multi-Grid Rack Female Camlok Connector Assembly Male Camlok Connector Assembly150 ft 200 ft 250 ft 300 ft 350 ft Weld Cable SizeOptional Remote Receptacle Information And Connections 45 m 60 m 70 m 90 m 105 m 120 mControls Dual Model Shown Safety EquipmentOperation Work Clamp Optional Polarity SwitchArcing can damage switch Amperage Controls Paralleling Switch Dual Models Only Optional Remote Grid Amperage ControlTurn Off all power before maintaining Maintenance & TroubleshootingRoutine Maintenance Months Sequence Of Shielded Metal Arc Welding SmawTroubleshooting Overload ProtectionElectrical Diagrams Circuit Diagram For 300 Ampere ModelCircuit Diagram For 400 Ampere Model Circuit Diagram For 250/250 Ampere Model Circuit Diagram For 350/350 Ampere Model Parts List Main AssemblyDia Part Panel, Front w/Components Nameplate Resistor Assembly, Current 049 BUS BAR, interconnecting resistors MOG-Pak 6 APR MOG-Pak 2, 4 Optional EquipmentRemote Control Service SupportOwner’s Record Miller Electric Mfg. Co