Instruction/ maintenance manual of the product 375 Miller Electric
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Processes Description Air Plasma Cutting and Gouging Air Plasma Cutter OM-2229 200 879N December 2004 Visit our website at www.MillerWelds.com Spectrum 375 And ICE-27C T orch R And Non-CE Models.
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. T o locate your nearest distributor or service agency call 1-800-4-A-Miller , or visit us at www .
T ABLE OF CONTENTS SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1. Symbol Usage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
dec_plas_2/04 Declaration of Conformity for European Community (CE) Products This in for mat ion is p rov ided for uni ts w ith CE certification (see rating label on unit). NOTE Manufacturer’s Name: Miller Electric Mfg. Co. Manufacturer’s Address: 1635 W .
OM-2229 Page 1 SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING pom _nd_5/04 1-1. Symbol Usage Means W arning! W atch Out! There are possible hazards with this procedure! The possible hazards are shown in the adjoining symbols. Y Marks a special safety message.
OM-2229 Page 2 D On inverter power sources, failed parts can ex- plode or cause other parts to explode when power is applied. Always wear a face shield and long sleeves when servicing inverters. EXPLODING P ARTS can injure. Sparks and hot metal blow out from the cutting arc.
OM-2229 Page 3 1-3. Additional Symbols For Installation, Operation, And Maintenance HOT P ARTS can cause severe burns. D Do not touch hot parts bare handed. D Allow cooling period before working on torch. MOVING P ARTS can cause injury . D Keep away from moving parts such as fans.
OM-2229 Page 4 1-5. Principal Safety Standards Safety in W elding and Cutting , ANSI Standard Z49.1, from American W elding Society , 550 N.W . LeJeune Rd, Miami FL 33126 Safety and Health Standards , OSHA 29 CFR 1910, from Superinten- dent o f Documents, U.
OM-2229 Page 5 SECTION 2 − CONSIGNES DE SÉCURITÉ − LIRE A V ANT UTILISA TION pom_fre 5/04 2-1. Signification des symboles Signifie Mise en garde ! Soyez vigilant ! Cette procédure présente des risques de danger ! Ceux-ci sont identifiés par des symboles adjacents aux directives.
OM-2229 Page 6 D Isoler la pince de masse quand pas mis à la pièce pour éviter le contact avec tout objet métallique. Il y a DU COURANT CONTINU IMPORT ANT dans les convertisseurs après la suppression de l’ali- mentation électrique.
OM-2229 Page 7 Les bouteilles de gaz contiennent du gaz sous haute pression. Si une bouteille est endommagée, elle peut exploser . Puisque les bouteilles de gaz font habituellement partie d’un processus de travail des métaux, assurez − vous de les manipuler correctement.
OM-2229 Page 8 2-4. Principales normes de sécurité Safety in W elding and Cutting, norme ANSI Z49.1, de l’American Wel- ding Society , 550 N.W . Lejeune Rd, Miami FL 33126 Safety and Health Sandards, OSHA 29 CFR 1910, du Superintendent of Documents, U.
OM-2229 Page 9 SECTION 3 − DEFINITIONS 3-1. W arning Label Definitions W arning! W atch Out! There are possible hazards as shown by the symbols. 1 Cutting sparks can cause explosion or fire. 1.1 Keep flammables away from cutting. Do not cut near flammables.
OM-2229 Page 10 3-2. Symbols And Definitions For Nameplate And Serial Number/Rating Label A Amperes Plasma Arc Cutting (P AC) Adjust Air/Gas Pressure Low Air Pressure Light V V olts Increase No − Do.
OM-2229 Page 1 1 SECTION 4 − INST ALLA TION 4-1. Specifications If the unit is operated from a 30* ampere, 1 15 volt circu it or a 15** ampere, 230 volt circuit, a different input power plug must be installed on the power cord. See Section 4-9 for instructions.
OM-2229 Page 12 4-3. 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, T emperature trouble light goes On, and cooling fan runs.
OM-2229 Page 13 16 in (406 mm) 4-5. Selecting A Location loc_2 3/96 - Ref. 802 784-B / 802 785-A / 802 786-B / 209 098 / 203 892-A 1 Lifting Handle Use handle to lift unit. 2 Hand Cart Use cart or similar device to move unit. 3 120 V AC Receptacle T o connect unit to 230 V AC input power , a customer supplied plug is necessary (see Section 4-9).
OM-2229 Page 14 4-6. Connecting Gas/Air Supply 802 787-B / Ref. 801 319-C / Ref. 802 784-B . Use only clean, dry air with 70 to 150 psi (483 to 1034 kPa) pressure. 1 Gas/Air Inlet Opening 2 Hose 3 T eflon T a pe Obtain hose with 1/4 NPT right- hand thread fitting.
OM-2229 Page 15 4-7. Connecting Work Clamp 802 463-A 1 Work Clamp 2 W orkpiece Connect work clamp to a clean, paint-free location on workpiece, as close to cutting area as possible. 1 2 4-8. Connecting Input Power Ref. 802 787-B / 802 786-B Check input voltage available at site.
OM-2229 Page 16 4-9. Installing Alternative Plug 1 Supplied 1 15 V AC Plug Cut cord close to plug. 2 Alternative Plug (230 V AC Plug Shown) 3 Load 1 (Brass) T erminal 4 Load 2 (Brass) T erminal 5 Ground (Green) T erminal 6 Outer Shell 7 Cord Grip Strip cord jacket back enough to separate conductors.
OM-2229 Page 17 SECTION 5 − OPERA TION 5-1. Controls 1 42 3 5 ON OFF PRESSURE 60 PSI 5 6 24 27 6 Set T o 60 PSI (414 kPa) 20 16 24 27 20 16 1 24 27 20 16 Requires 70-150 PSI (483-1034 kPa) Supply Setting Gas/Air Pressure 1 Output Control Use control to set cutting output.
OM-2229 Page 18 5-2. Cutting Speed The cutting speed curves show the recommended 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 .
OM-2229 Page 19 out bottom of cut. Ref. 802 878 5-4. Sequence Of Operation After cutting arc starts, slowly start moving torch across metal. Adjust torch speed so sparks go thru metal and Pause briefly at end of cut before releasing trigger . EXAMPLE Of Cutting Operation Raise trigger lock and press trigger .
OM-2229 Page 20 SECTION 6 − MAINTENANCE & TROUBLESHOOTING 6-1. Routine Maintenance Y Disconnect power before maintaining. . Maintain more often during severe conditions.
OM-2229 Page 21 6-2. Overload Protection: T rouble Lights & Checking Shield Cup Shutdown System 1 Power Light Light is steady if input power is okay . Light flashes for the following conditions: a If input power is 1 15 volts ac, but power supply is less than 92 volts ac or greater than 13 8 volts ac.
OM-2229 Page 22 6-3. T orch And W ork Cable Connections If torch or work cable needs to be removed or replaced, proceed as follows: T urn power Of f, and disconnect input power plug from receptacle. Remove wrapper from unit. T orch Connections Remove existing torch cable from unit.
OM-2229 Page 23 6-4. Checking/Replacing Retaining Cup, Tip, And Electrode Overtightening will strip threads. Do not overtighten retaining cup during assembly . Do not cross-thread parts causing stripping. Use care during torch assembly and parts replacement.
OM-2229 Page 24 6-5. T roubleshooting Power Source Connect unit to proper input voltage (see Section 4-8). Ye s No Is input power connected to correct line voltage? Is Changeover switch S2 in the 1 15V or 230V position? Place Changeover switch i n proper position for input voltage (see Section 4-8).
OM-2229 Page 25 6-6. T roubleshooting T orch T orch travel speed too slow; increase travel speed (see Section 5-2 ). Clean or replace torch consumables as necessary (see Section 6-4 ).
OM-2229 Page 26 SECTION 7 − ELECTRICAL DIAGRAM 200 809-D Figure 7-1. Circuit Diagram.
OM-2229 Page 27 Notes.
OM-2229 Page 28 SECTION 8 − P ARTS LIST . Hardware is common and not available unless listed. 802 805-C 26 2 1 25 24 23 22 21 20 19 18 17 16 14 13 12 11 10 9 8 7 6 5 4 3 15 27 Figure 8-1.
OM-2229 Page 29 Figure 8-1. Main Assembly Diagram marking Item No. Part No. Description Quantity 212 476 COVER ASSY (non-CE) (including) 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212 477 COVER ASSY (CE) (including) 1 .
OM-2229 Page 30 1 183 42 7 Handle Assy , complete (1) 2 171 248 Push Button Switch (1) 3 203 120 Leads, 20ft (1) 4 203 1 19 Main Body (1) 5 185 833 Switch Assembly w/spring (1) 190 220 Spring, trigger assembly 169 231 Grease, silicone (1) 195 014 T orch, replacement 20ft (1) See Figure 8-3 for additional consumable parts.
Warranty Questions? Call 1-800-4-A-MILLER for your local Miller distributor. miller_warr 6/04 Y our distributor also gives you ... Service Y ou always get the fast, reliable response you need. Most replacement parts can be in your hands in 24 hours. Support Need fast answers to the tough welding questions? Contact your distributor .
PRINTED IN USA 2004 Miller Electric Mfg. Co. 10/04 Miller Elect ric M fg. Co. An Illinois T ool Wo rks Compan y 1635 W est Spencer Street Applet on, WI 5 4914 USA International He adquarters − U.
An important point after buying a device Miller Electric 375 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Miller Electric 375 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Miller Electric 375 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Miller Electric 375 you will learn all the available features of the product, as well as information on its operation. The information that you get Miller Electric 375 will certainly help you make a decision on the purchase.
If you already are a holder of Miller Electric 375, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Miller Electric 375.
However, one of the most important roles played by the user manual is to help in solving problems with Miller Electric 375. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Miller Electric 375 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
