Manuale d’uso / di manutenzione del prodotto 251 NT del fabbricante Miller Electric
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Processes Description TIG (GT A W ) W elding Stick (SMA W) W elding MIG (GMA W) W elding Flux Cored (FCAW) Engine Driven Welding Generator OM-486 187 236H February 2000 T railblazer 251 NT Visit our website at www.
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 .
The following terms are used interchangeably throughout this manual: MIG = GMAW , Wire W elding TIG = GT AW Stick = SMAW The engine exhaust from this product contains chemicals known to the State of California to cause cancer , birth defects, or other reproductive harm.
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OM-486 Page 1 SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING rom _nd_1 1/98 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. Marks a special safety message.
OM-486 Page 2 W elding on closed containers, such as tanks, drums, or pipes, can cause them to blow up. Sparks c a n fly off from the welding arc. The flying sparks, hot workpiece, and hot equipment can cause fires and burns. Accidental contact of electrode to metal objects can cause sparks, explosion, overheating, or fire.
OM-486 Page 3 MOVING P ARTS can cause injury . Keep away from fans, belts, and rotors. Keep all doors, panels, covers, and guards closed and securely in place. Stop engine before installing or connecting unit. Have only qualified people remove guards or covers for maint- enance and troubleshooting as necessary .
OM-486 Page 4 H. F . RADIA TION can cause interference. High-frequency (H.F .) can interfere with radio navigation, safety services, computers, and communications equipment. Have only qualified persons familiar with electronic equipment perform this installation.
OM-486 Page 5 SECTION 1 – CONSIGNES DE S É CURIT É – LIRE A V ANT UTILISA TION rom _nd_fre 1 1/98 1-1. Signification des symboles Signifie Mise en garde ! Soyez vigilant ! Cette proc é dure pr é sente des risques de danger ! Ceux-ci sont identifi é s par des symboles adjacents aux directives.
OM-486 Page 6 Le soudage ef fectu é sur des conteneurs ferm é s tels que des r é servoirs, tambours ou des conduites peut provoquer leur é clatement.
OM-486 Page 7 DES ORGANES MOBILES peuvent provoquer des blessures. Ne pas approcher les mains des ventilateurs, cour- roies et autres pi è ces en mouvement. Maintenir ferm é s et fixement en place les portes, panneaux, recouvrements et dispositifs de protection.
OM-486 Page 8 LE RA YONNEMENT HAUTE FR É - QUENCE (H.F .) risque de provoquer des interf é rences. Le rayonnement haute fr é quence (H.F .) peut provoquer des interf é rences avec les é quipements de radio – navigation et de communication, les services de s é curit é et les ordinateurs.
OM-486 Page 9 SECTION 2 – DEFINITIONS 2-1. Symbol Definitions Stop Engine Fast (Run, W eld/Power) Fast/Slow (Run/Idle) Slow (Idle) Start Engine Panel/Local T emperature Fuel Engine Oil On Check V al.
OM-486 Page 10 3-2. Dimensions, W eights, and Operating Angles Dimensions A Height 33 in (838 mm) B C Width 18-3/4 in (476 mm) C Depth 45-1/2 in ( 1 156 mm) D Do not exceed tilt angles or engine could be damaged or unit could tip. A 18 in (457 mm) G Do not move or operate unit where it could tip.
OM-486 Page 1 1 ST-189 268 The ac auxiliary power curve shows the auxiliary power available in amperes at the receptacles. 3-4. Auxiliary Power Curve 0 20 40 60 80 100 120 140 160 0 20 40 60 80 100 12.
OM-486 Page 12 ST-189 266 / ST -189 267 / ST-189 265 The volt-ampere curves show the minimum and maximum voltage an d amperage output capabilities of the welding generator . Curves of other settings fall between the curves shown. A. CC/DC Mode B. CV/DC Mode C.
OM-486 Page 13 SECTION 4 – INST ALLA TION install1 12/99 – Ref. ST-800 652 / Ref. ST -800 477-A / ST-158 936-A / S-0854 Do not weld on base. W eld- ing on base can cause fuel tank fire or explosion. Bolt unit down using holes pro- vided in base.
OM-486 Page 14 4-3. Activating The Dry Charge Battery (If Applicable) Remove b attery from unit. 1 Eye Protection – Safety Glasses Or Face Shield 2 Rubber Gloves 3 V ent Caps 4 Sulfuric Acid Electrolyte (1.265 Specific Gravity) 5 W ell Fill each cell with electrolyte to bottom of well (maximum).
OM-486 Page 15 4-4. Connecting The Battery Ref. ST-800 394-C / Ref. ST -189 925-A / Ref. S-0756-D + – 3/8, 1/2 in Connect negative ( – ) cable last. T ools Needed: 4-5. Installing Exhaust Pipe ST-801 681 / Ref. ST -189 925-A Point exhaust pipe in desired direction.
OM-486 Page 16 4-7. Selecting W eld Cable Sizes T otal Cable (Copper) Length In W eld Circuit Not Exceeding W elding Amperes 100 ft (30 m) Or Less 150 ft (45 m) 200 ft (60 m) 250 ft (70 m) 300 ft (90 .
OM-486 Page 17 4-9. Adjusting MIG Weld Puddle Consistency ST-801 944-C / Ref. ST -189 925-A Stop engine. Stabilizer DC-Z is factory connected to suit most MIG (Wire W elding) applications. T o change MIG weld puddle consis- tency , proceed as follows: Remove lower front panel and side panel.
OM-486 Page 18 SECTION 5 – OPERA TING WELDING GENERA TOR 5-1. Front Panel Controls Ref. ST-189 925-A 1 DC Polarity/AC Switch Do not switch under load. Us e switch to select AC weld output or polar- ity of DC weld output. 2 Process Select Switch Do not switch under load.
OM-486 Page 19 5-2. Remote Amperage/V oltage Control 1 Remote 14 Receptacle RC1 Connect optional remote control to RC1 (see Section 4-8). 2 Remote Hand Control (Optional) 3 Remote Foot Control (Optional) Engine runs at weld/power speed whenever a device con- nected to the remote 14 recep- tacle is running.
OM-486 Page 20 SECTION 6 – OPERA TING AUXILIAR Y EQUIPMENT 6-1. Auxiliary Power Receptacles And Circuit Breakers Ref. ST-189 925-A 1 4 2 5 3 If unit does not have GFCI re- ceptacles, use GFCI- protected extension cord. Auxiliary power decreases as weld current increases.
OM-486 Page 21 6-2. Optional Auxiliary Power Receptacles If unit does not have GFCI re- ceptacles, use GFCI- protected extension cord. Auxiliary power decreases as weld current increases. Combined output of all receptacles limited to 8 kV A/kW rating of the generator .
OM-486 Page 22 SECTION 7 – MAINTENANCE AND TROUBLESHOOTING 7-1. Routine Maintenance Recycle engine fluids. Stop engine before maintaining. Se e Engine Manual and Maintenance Label. Ser- vice more often if used in severe conditions. * T o be done by Factory Authorized Service Agent.
OM-486 Page 23 7-2. Maintenance Label Follow the storage procedure in the engine owner ’ s manual if the unit will not be used for an extended period.
OM-486 Page 24 7-3. Servicing Air Cleaner aircleaner3 1/97 – ST-156 852 / Ref. ST -185 095-A / S-0759 Stop engine. Do not run engine without a ir cleaner or with dirty element. 1 W rapper (Foam Element) Wash wrapper with soap and water solution.
OM-486 Page 25 7-5. Changing Engine Oil, Oil Filter , And Fuel Filter Ref. ST-801 942-C / ST -800 395-B / Ref. ST-189 925-A / S-0842 Stop engine and let cool. 1 Oil Drain V alve 2 1/2 ID x 12 in Hose 3 Oil Filter Change engine oil and filter accord- ing to engine manual.
OM-486 Page 26 7-6. Adjusting Engine Speed Ref. ST-801 942-C / ST -800 397-A After tuning engine, check engine speeds with a tachometer (see table). If necessary , adjust speeds as follows: Start engine and run until warm. T urn A/V control to max. Idle Speed Adjustment 1 Throttle Solenoid 2 Mounting Screw Loosen two mounting screws.
OM-486 Page 27 Stop engine. When a circuit breaker or fuse opens, it usually indicates a more serious problem exists. Contact a Factory Authorized Service Agent. 1 Circuit Breaker CB5 CB5 protects the 24 volt ac output to Remote 14 receptacle RC1.
OM-486 Page 28 T rouble Remedy Low weld output. Check control settings. Place Remote Amperage/V oltage switch in Panel position, or move switch to Remote 14 position and connect remote amperage/voltage control to Remote 14 receptacle RC1. Check and clean air cleaner as necessary (see Section 7-3).
OM-486 Page 29 B. Auxiliary Power T rouble Remedy No power output. Reset circuit breakers CB1, CB2, CB3 and/or CB4 (see Section 6-1). Check fuse F1, and replace if necessary (see Section 7-7). Have Factory Authorized Service Agent check brushes, slip rings, and field current control board PC2.
OM-486 Page 30 SECTION 8 – ELECTRICAL DIAGRAM Figure 8-1. Circuit Diagram For Welding Generator.
OM-486 Page 31 ST-190 578-B.
OM-486 Page 32 SECTION 9 – AUXILIAR Y POWER GUIDELINES 9-1. Selecting Equipment aux_pwr 2/99 – Ref. ST-159 730 / ST -800 577 1 Auxiliary Power Receptacles – Neutral Bonded T o Frame 2 3-Prong Plug From Case Grounded Equipment 3 2-Prong Plug From Double Insulated Equipment OR 2 Be sure equipment has this symbol and/or wording.
OM-486 Page 33 9-3. Grounding When Supplying Building Systems ST-800 576-B 1 Equipment Grounding T erminal 2 Grounding Cable Use #10 A WG or larger insulated copper wire. 3 Ground Device Ground generator to system earth ground if supplying power to a premises (home, shop, farm) wiring system.
OM-486 Page 34 9-5. Approximate Power Requirements For Industrial Motors Industrial Motors Rating Starting Watts Running W atts Split Phase 1/8 HP 800 300 1/6 HP 1225 500 1/4 HP 1600 600 1/3 HP 2100 7.
OM-486 Page 35 9-7. Approximate Power Requirements For Contractor Equipment Contractor Rating Starting W atts Running Watts Hand Drill 1/4 in 350 350 3/8 in 400 400 1/2 in 600 600 Circular Saw 6-1/2 i.
OM-486 Page 36 9-8. Power Required T o Start Motor S-0624 1 Motor Start Code 2 Running Amperage 3 Motor HP 4 Motor V oltage T o find starting amperage: Step 1: Find code and use table to find kV A/HP . If code is not listed, multiply running amperage by six to find starting amperage.
OM-486 Page 37 9-10. T ypical Connections T o Supply Standby Power S-0405-A 1 Power Company Service Meter 2 Main and Branch Overcurrent Protection 3 Double-Pole, Double-Throw T ransfer Switch Obtain and install correct switch. Switch rating must be same as or greater than the branch overcurrent protection.
OM-486 Page 38 9-1 1. Selecting Extension Cord (Use Shortest Cord Possible) Cord Lengths for 120 V olt Loads If unit does not have GFCI receptacles, use GFCI-protected extension cord.
OM-486 Page 39 SECTION 10 – P ARTS LIST ST-802 048-D Hardware is common and not available unless listed. 1 2 3 4 5 6 7 8 9 11 12 13 14 15 16 17 18 19 10 20 21 22 23 24 – Fig 10 – 3 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 42 43 44 45 46 47 48 49 50 47 51 46 45 53 54 – Fig.
OM-486 Page 40 Description Part No. Dia. Mkgs. Item No. Figure 10-1. Main Assembly Quantity 1 182 367 P ANEL, right side 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OM-486 Page 41 Description Part No. Dia. Mkgs. Item No. Figure 10-1. Main Assembly (Continued) Quantity RC1 174 824 CONNECTOR & PINS 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OM-486 Page 42 Description Part No. Dia. Mkgs. Item No. Figure 10-2. Panel, Front w/Components (Fig 10-1 Item 54) Quantity 1 187 593 P ANEL, front 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OM-486 Page 43 Description Part No. Item No. Figure 10-3. Generator (Fig 10-1 Item 24) Quantity 1 +186 238 ST A TOR 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Warranty Questions? Call 1-800-4-A-MILLER for your local Miller distributor. miller_warr 7/00 Y ou r 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 2000 Miller Electric Mfg. Co. 6/00 Miller Elect ric Mfg. Co. An I l li noi s T ool Works Com pany 1635 W est S pencer St reet Applet on, WI 54914 USA International He adquarters –.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Miller Electric 251 NT è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Miller Electric 251 NT - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Miller Electric 251 NT imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Miller Electric 251 NT ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Miller Electric 251 NT, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Miller Electric 251 NT.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Miller Electric 251 NT. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Miller Electric 251 NT insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
