Miller Electric OM-225A Owner'S Manual Download Page 1

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Processes

Description

Air Plasma Cutting
and Gouging

Air Plasma Cutter

OM-225A

February 1998

Eff. w/Serial Number KG155768

Spectrum 650 Cut Force



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www.MillerWelds.com

Summary of Contents for OM-225A

Page 1: ...Processes Description Air Plasma Cutting and Gouging Air Plasma Cutter OM 225A February 1998 Eff w Serial Number KG155768 Spectrum 650 Cut Force R Visit our website at www MillerWelds com ...

Page 2: ...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...

Page 3: ...r or matches from your person before doing any cutting Touching live electrical parts can cause fatal shocks or severe burns The torch and work circuit are electrically live whenever the output is on The input power circuit and machine internal circuits are also live when power is on Plasma arc cutting requires higher voltages than welding to start and maintain the arc 200 to 400 volts dc are comm...

Page 4: ...e sure the breathing air is safe D Do not cut in locations near degreasing cleaning or spraying oper ations The heat and rays of the arc can react with vapors to form highly toxic and irritating gases D Do not cut on coated metals such as galvanized lead or cadmium plated steel unless the coating is removed from the cutting area the area is well ventilated and if necessary while wearing an air sup...

Page 5: ...rference stop using the equipment at once D Have the installation regularly checked and maintained D Keep high frequency source doors and panels tightly shut keep spark gaps at correct setting and use grounding and shielding to minimize the possibility of interference ARC CUTTING can cause interference D Electromagnetic energy can interfere with sensitive electronic equipment such as computers and...

Page 6: ... magnetic fields is a human health hazard However studies are still going forth and evidence continues to be examined Until the final conclusions of the research are reached you may wish to minimize your exposure to electromagnetic fields when welding or cutting To reduce magnetic fields in the workplace use the following proce dures 1 Keep cables close together by twisting or taping them 2 Arrang...

Page 7: ...nts qui ont déjà reçu des combustibles D Portez des vêtements de protection exempts d huile tels que des gants en cuir une veste résistante des pantalons sans revers des bottes et un casque D Ne placez pas le poste sur une surface combustible ou au dessus de celle ci D Avant le coupage retirez tout combustible de vos poches par exemple un briquet au butane ou des allumettes Le fait de toucher à un...

Page 8: ...aterial Safety Data Sheets MSDS et les instructions du fabricant pour obtenir plus de renseignements sur les métaux à couper les enrobages et les nettoyants D Travaillez dans un espace restreint uniquement s il est bien ventilé ou si vous portez un respirateur anti vapeurs Les vapeurs causées par le cou page et l épuisement de l oxygène peuvent altérer la qualité de l air et entraîner des blessure...

Page 9: ...érences avec les équipements de ra dio navigation et de communication les services de sécurité et les ordinateurs D Demander seulement à des personnes qualifiées familiarisées avec des équipements électroniques de faire fonctionner l installation D L utilisateur est tenu de faire corriger rapidement par un électricien qualifié les interférences résultant de l installation D Si le FCC signale des i...

Page 10: ... toujours en cours et les preuves continuent à être examinées En attendant que les conclusions finales de la recherche soient établies il vous serait sou haitable de réduire votre exposition aux champs électromagnétiques pendant le soudage ou le coupage Afin de réduire les champs électromagnétiques dans l environnement de travail respecter les consignes suivantes 1 Garder les câbles ensembles en l...

Page 11: ...6 mm At 10 IPM 340 While idling 6 Minutes Cutting 4 Minutes Resting 5 Minutes Cutting 5 Minutes Resting 2 2 Duty Cycle And Overheating Duty Cycle is percentage of 10 min utes that unit can cut at rated load without overheating If unit overheats thermostat s opens output stops Temperature trouble light goes On and cooling fan runs Wait fifteen minutes for unit to cool or temperature light to go off...

Page 12: ... maximum cutting speed capabilities of the power source and torch for mild steel of various thickness Cut at speeds below the lines shown to avoid poor cuts and torch wear ST 180 909 Cutting speed is approximately 10 inches per minute at 5 8 in mild steel thickness at max setting ...

Page 13: ...determine input power needs 4 Line Disconnect Device Locate unit near correct input power supply Y Special installation may be required where gasoline or volatile liquids are present see NEC Article 511 or CEC Section 20 17 in 432 mm 10 in 254 mm Movement Y Do not move or operate unit where it could tip Location And Airflow Dimensions And Weight 69 lb 31 3 kg 4 2 1 10 in 254 mm 10 in 254 mm 4 10 i...

Page 14: ...rding to installed fitting and connect to fit ting Route hose to gas air supply Adjust gas air pressure according to Section 3 1 Y Incorrect plasma gas can cause torch and power source damage Use only air or nitrogen for the plasma gas Ref ST 801 390 ST 801 391 From Gas Air Supply 5 Use only clean dry gas air with 70 to 150 psi 483 to 1034 kPa pressure 4 3 6 1 2 2 6 Electrical Service Guide Three ...

Page 15: ... Label Rotate switch to match input voltage 3 Input And Grounding Conductors 4 Line Disconnect Device See Section 2 6 For single phase operation 5 Black And Brown Input Conductor 6 Blue Input Conductor 7 Insulation Sleeving 8 Electrical Tape Insulate and isolate blue conductor as shown 4 4 3 3 3 5 3 8 7 6 L2 L3 L1 L2 Y Always connect grounding conductor first 1 3 GND PE Tools Needed 1 2 5 32 in 23...

Page 16: ...tell if unit is ready for operation Ready light comes on when Power switch is placed in On position indicating that all safe ty shutdown systems are okay If Ready light does not come on check Trouble Lights 4 Trouble Lights See Section 4 2 5 Output Control Use control to set cutting output Gas air automatically flows at the set pressure Setting Gas Air Pressure Place controls in positions shown On...

Page 17: ... allow correct standoff distance approximately 1 8 in 3 mm For gouging use 1 8 to 1 4 in 3 6 mm standoff Hold tip at about a 45 angle Be sure to use gouging consumables Do not clean torch by hitting it against a hard surface Hitting hard surfaces can damage torch parts and stop proper opera tion Inspect shield cup tip and electrode for wear before cutting or whenever cutting speed has been signifi...

Page 18: ...severe conditions Each Use Check Torch Tip Electrode And Shield Cup Check Gas Air Pressure Every Week Check Shield Cup Shutdown System 3 Months Service Air Filter Regulator Replace Damaged Or Unreadable Labels Tape Torn Outer Covering Or Replace Cable Replace Cracked Parts Check Gas Air Hose Check Torch Body 6 Months Blow Out Or Vacuum Inside ...

Page 19: ...tdown system once a week see Section 4 3 3 Temperature Light Lights if power source overheats see Section 2 2 1 2 3 4 3 Checking Shield Cup Shutdown System Ref ST 801 397 A 1 Torch Shield Cup Turn Power On and loosen shield cup If shutdown system works properly Ready light goes off and Cup light comes on If not immedi ately turn Off power and contact Factory Reliability Department If system works ...

Page 20: ...as air system for leaks Pressure Trouble light On Ready light off Check for correct gas air pressure adjustment see Section 3 1 Check for sufficient gas air supply pressure see Section 2 5 Check for dirty air filter regulator and clean if needed see manufacturer s instructions Cup Trouble light On Ready light off Check torch shield cup see Section 4 3 Have Factory Authorized Service Agent check fo...

Page 21: ...OM 225 Page 19 SECTION 5 ELECTRICAL DIAGRAM SC 186 187 Figure 5 1 Circuit Diagram ...

Page 22: ...0 SECTION 6 PARTS LIST Figure 6 1 Complete Assembly 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 23 32 31 30 27 33 34 37 36 35 39 38 40 41 42 43 44 45 46 47 48 49 50 ST 801 407 B 29 28 51 52 ...

Page 23: ...pressure air 40psi 1 26 GS1 181 448 VALVE solenoid 3 way 24VDC 1 27 181 450 BRACKET solenoid mtg 1 28 PC2 181 397 LED POT PWD ASSEMBLY 1 29 S2 181 385 CHANGEOVER switch assembly w knob 1 30 181 452 FITTING close nipple 1 8NPT x 3 4 L 1 31 181 453 FITTING tee female 1 8NPT 1 32 181 455 FITTING street tee 1 8NPT 1 33 171 335 KNOB round w indicator dot 1 34 171 475 STRAIN RELIEF 16 1 35 181 381 CABLE...

Page 24: ... Continued Quantity Mkgs 48 R1 3 181 391 RESISTOR 3 ohm 140W 2 49 PC5 181 389 CF PWB assembly 1 50 PC3 181 390 CROW BAR PWB assembly 1 51 186 257 THYRISTOR bypass 100A 1200V 1 52 186 256 CHASSIS main 1 BE SURE TO PROVIDE MODEL AND SERIAL NUMBER WHEN ORDERING REPLACEMENT PARTS ...

Page 25: ...OM 225 Page 23 Notes ...

Page 26: ...OM 225 Page 24 Notes ...

Page 27: ...tting Torches Remote Controls Accessory Kits Replacement Parts No labor Spoolmate 185 Spoolmate 250 Canvas Covers Miller s True Blue Limited Warranty shall not apply to 1 Consumable components such as contact tips cutting nozzles contactors brushes slip rings relays or parts that fail due to normal wear 2 Items furnished by Miller but manufactured by others such as engines or trade accessories The...

Page 28: ... complete and retain with your personal records Always provide Model Name and Serial Style Number Call 1 800 4 A Miller or see our website at www MillerWelds com to locate a DISTRIBUTOR or SERVICE AGENCY near you Welding Supplies and Consumables Options and Accessories Personal Safety Equipment Service and Repair Replacement Parts Training Schools Videos Books Technical Manuals Servicing Informati...

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