Manuale d’uso / di manutenzione del prodotto Pro AA4500 del fabbricante Graco Inc.
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308936 Rev . B Supersedes Rev . A First choice when quality counts. 01944A NOTE: Any modification of genuine Graco parts or replacement of parts with non-Graco parts will void agency approvals. U.S. Patent No. 4,290,091; 4,219,865; 4,497,447; 4,462,061; 4,660,774; 5,063,350; 5,080,289; 5,289,977 Patented 1986, 1987 Canada Brevete 1986, 1987 U.
2 308936 W ARNING FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD Improper grounding, poor air ventilation, open flames, or sparks can cause a hazardous condition and result in a fire, explosion, or electric shock.
308936 3 W ARNING INJECTION HAZARD Spray from the gun, hose leaks, or ruptured components can inject fluid into your body and cause an extremely serious injury , including the need for amputation. Splashing fluid in the eyes or on the skin can also cause a serious injury .
4 308936 T able of Contents W arnings 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Symbols 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction 5 . . . . . . . . . . . . . . . . . . .
308936 5 Introduction How the PRO AA4500/UNICARB Electrostatic Air-Assisted Spray Gun Operates W ARNING Remember , this is not an air spray gun; for your safety be sure to read and follow the W arnings on pages 2 to 3 and throughout the text of this instruction manual.
6 308936 Installation Installing the System W ARNING FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD Installing and servicing this equipment requires access to parts which may cause electric shock or other serious injury if work is not performed properly .
308936 7 Installation 01945B Fig. 1 KEY A* Bleed-type Air Shutoff V alve B Air Line Filter H Fluid Shutoff V alve K Pressure Gauge L* Grounded Braid T ype Fluid Hose with spring guards M Gun Fluid Inl.
8 308936 Installation Ground the System W ARNING FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD When operating the electrostatic device, any ungrounded objects in the spray area (such as people, containers, tools, etc.
308936 9 Operation Operating Checklist Check the following list daily , before starting to operate the system, to help ensure safe, efficient operation. ____ 1. All the operators are properly trained to safely operate an electrostatic air-assisted airless spray system as instructed in this manual.
10 308936 Operation Pressure Relief Procedure W ARNING INJECTION HAZARD The system pressure must be manually relieved to prevent the system from starting or spraying accidentally . Fluid under high pressure can be injected through the skin and cause serious injury .
308936 11 Gun Setup 1. Complete the Operating Checklist and follow the W arnings on pages 9 and 10. 2. Connect the Graco air hose. W ARNING ELECTRIC SHOCK HAZARD T o reduce the risk of electric shock or other serious injury , the air supply hose must be electrically connected to a true earth ground.
12 308936 Gun Setup 3. Check the gun ’ s electrical grounding. W ARNING FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD Megohmmeter P/N 218979 (E) is not approved for use in a hazardous area.
308936 13 Gun Setup 5. Connect the fluid hose. A. Before connecting the fluid line, blow it out with air and flush it with solvent. Use solvent which is com- patible with the fluid to be sprayed. B. Connect the static-free fluid hose (F) to the 1/4 – 18 npsm gun fluid fitting (10).
14 308936 Gun Setup 10. Install the pre-orifice W ARNING T o reduce the risk of a serious injury , including fluid injection, follow the Pressure Relief Procedure on page 10 when you stop spraying and whenever you are instructed to relieve the pressure.
308936 15 Gun Setup 12. Set the air pressure . A. Atomizing air is not used in the UNICARB process. Close the air control valve (43) by turning it fully clockwise. B. T urn the ES ON-OFF lever (26) to ON. Fig. 12A-B 01947 26 ON 43 close C. Make sure the fluid supply is shut off.
16 308936 Gun Setup 13. Setting the Atomization Fluid Pressure Atomization fluid pressure will vary based on the type of fluid used, the flow rate desired, the fluid tempera- ture, and the percentage of CO 2 used. Follow the recommendations of your material and equipment supplier .
308936 17 Daily Gun Care, Flushing, and Cleaning W ARNING INJECTION HAZARD T o reduce the risk of serious injury , including fluid injection, splashing in the eyes or on the skin or electric shock, al.
18 308936 Daily Gun Care, Flushing, and Cleaning General System Maintenance 1. Clean the fluid and air line filters daily . 2. Check all of the work hangers for material build-up; clean them if necessary . 3. Check for any fluid leakage from the gun and fluid hoses.
308936 19 Daily Gun Care, Flushing, and Cleaning 6. Lock the trigger safety latch and turn off the solvent supply . 7. Follow the Pressure Relief Procedure W arning on page 10. 8. Make sure the trigger safety latch is locked, then disconnect the solvent (F) and air (A) supply hoses from the gun.
20 308936 Daily Gun Care, Flushing, and Cleaning 13. Remove the bottom fluid tube fitting (P) and filter (14). Clean the filter in a compatible solvent. 14. Reinstall the filter and fitting. Do not over-tighten and make sure the top fluid tube fitting (Q) remains tightened.
308936 21 Daily Gun Care, Flushing, and Cleaning 19. Place the spray tip (9) in the air cap (1). Align the tab of the tip with the groove in the air cap.
22 308936 Spray Pattern T roubleshooting W ARNING Installing and servicing this equipment requires access to parts which may cause electric shock or other serious injury if the work is not performed properly . Do not install or service this equipment unless you are trained and qualified.
308936 23 Gun Operation T roubleshooting PROBLEM CAUSE SOLUTION Leakage from fluid needle area Fluid needle packings loose Fluid needle packing damaged Tighten packing nut; See page 33 Replace fluid needle; See page 34 Air leakage from front of gun Air valve not turned off Piston air valve not seating properly Turn of f air (43).
24 308936 Electrical T roubleshooting NOTE: Additional gun troubleshooting can be done on Gun Part No. 236031 using the Remote Spraying V oltage Read- out ( SVR ) .
308936 25 Electrical T ests The performance and safety of the spray gun are directly affected by the condition of the electrical components contained inside the gun.
26 308936 Electrical T ests T est Power Supply Resistance (See Fig. 5) Remove the power supply (18) from the gun. See page 35. Measure the resistance from the power supply ’ s ground contact point (EE) to the contact inside of the power supply seal (18e) [the conductive rubber contact may be slightly recessed into the seal] .
308936 27 Electrical T ests T est Barrel Resistance (See Fig. 6) Measure the resistance between the barrel contact ring (3a) and the metal contact pin (E), using a metal rod (D) and megohmmeter as shown in Fig. 6. Be careful not to damage or scratch the inner surfaces of the barrel with the metal rod.
28 308936 Service Prepare the Gun for Service W ARNING ELECTRIC SHOCK HAZARD Installing and servicing this equipment requires access to parts that may cause electric shock or other serious injury if the work is not performed properly . Do not install or service this equipment unless you are trained and qualified.
308936 29 Service Pre-Orifice, Tip Guard, Air Cap, Spray T ip, or Seat Housing Replacement 1. Prepare the gun for service as instructed on page 28. 2. Remove the retaining nut (8), tip guard, (2), air cap (1), and spray tip (9). See Fig. 7. Y ou may have to turn the air cap with the tip guard to remove the air cap from the gun.
30 308936 Service Electrode Replacement W ARNING ELECTRIC SHOCK HAZARD T o reduce the risk of fire, explosion, or electric shock, do not operate the spray gun without the electrode installed in the air cap. 1. Prepare the gun for service as instructed on page 28.
308936 31 Service Fluid T ube Removal & Replacement T o remove the fluid tube assembly (12) for cleaning or replacement: 1. Prepare the gun for service as instructed on page 28. 2. Disconnect the bottom fluid tube nut (C). See Fig. 10. 3. Carefully unscrew the top fluid tube nut (D).
32 308936 Service Barrel Removal 1. Prepare the gun for service as instructed on page 28. 2. Disconnect the bottom fluid tube nut (C). See Fig. 12. NOTE: 2-finger trigger guns only It should not be necessary to remove the fluid fitting (10) from the bracket.
308936 33 Service Fluid Packing Adjustment If fluid leaks from the fluid needle area, the fluid pack- ings may be loose. T ighten the packings, following the procedure below . 1. Prepare the gun for service as instructed on page 28. 2. Remove the retaining nut (8), tip guard, (2), air cap (1), and spray tip (9).
34 308936 Service Fluid Needle Assembly Removal 1. Prepare the gun for service as instructed on page 28. 2. Remove the retaining nut (8), tip guard, (2), air cap (1) and spray tip (9). See Fig. 7, page 29. Y ou may have to turn the air cap with the tip guard to remove the air cap from the gun.
308936 35 Service Fig. 16 7 35 37a 37b 18a 18 37 F 3 18b 18c 18d 18e 01953A Power Supply Removal and Replacement NOTES: a. T o avoid a loss in electrostatic performance, inspect the gun handle ’ s power supply cavity for dirt or moisture. Clean the cavity with a clean, dry rag.
36 308936 Service T urbine Alternator Removal and Replacement NOTE: Replace turbine bearings after 2000 hours of operation. See your authorized Graco representative. 1. Prepare the gun for service as instructed on page 28. 2. Remove the power supply from the gun handle as instructed on page 35.
308936 37 Service ES ON-OFF V alve Repair 1. Prepare the gun for service as instructed on page 28. 2. Loosen the set screw (24) with the 2 mm hex key (63), supplied.
38 308936 Service Air Control V alve Repair NOTE: The air control valve (43) can be replaced as an assembly or as individual parts. T o disassemble the air control valve, 1. Prepare the gun for service as instructed on page 28. 2. Remove the retaining ring (43h).
308936 39 Service Air V alve Repair 1. Prepare the gun for service as instructed on page 28. 2. Using a screw driver , remove the air valve cap (45). See Fig. 20. 3. Remove the o-ring (23) and spring (44). CAUTION Clean all parts in non-conductive solvent compatible with the fluid being used, such as xylol or mineral spirits.
40 308936 Notes.
308936 41 T echnical Data Category Data Gun Weight 35 oz (1 kg) Gun Length 1 1.4 in (290 mm) Maximum Air Working Pressure 100 psi (7 bar , 0.7 MPa) Maximum Fluid Working Pressure 3000 psi (207 bar , 20.7 MPa) T ypical Noise Level at 40 psi (2.8 bar , 0.
1 2 3 4 5 6 7 8 9 14 12 REF 12 13 15 16 17 18a 18e 18 18b 18d 18c 19 21 23 24 26 28 30 31 32 19 33 34 35 36 37 37a 37b 38 39 40 41 42 43b 43d 43f 43g 43h 43e 43c 44 45 46 47 3a 9a 56 57 1a Item 1 incl.
308936 43 Parts W ARNING Some PRO 4500sc Gun replacement parts look similar to other PRO Gun parts but are not interchangeable! When servicing, do not mix or use other PRO Gun parts! Use of parts othe.
44 308936 Accessories Use Only Genuine Graco Parts and Accessories AIR LINE ACCESSORIES Conductive Air Supply Hose; black 100 psi (7 bar , 0.7 MPa) Maximum Working Pressure FM Approved; Color coded black; 0.315 in. (8 mm) ID; 1/4 npsm(f) x 1/4 npsm(f) left-hand thread 220444 6 ft (1.
308936 45 Accessories Use Only Genuine Graco Parts and Accessories FLUID LINE ACCESSORIES High Pressure Ball V alves 5000 psi (350 bar , 35 MPa) Maximum Working Pressure For turning fluid off or on to.
46 308936 Accessories Use Only Genuine Graco Parts and Accessories MISCELLANEOUS ACCESSORIES Grounding Clamp and Wire 22201 1 0189 12 ga, 25 ft (7.6 m) wire Megohmmeter 218979 500 V olt output; 0.
308936 47 Spray Tip Selection Chart Part N o. Fan Width at 10 in. (260 mm) in. (mm) Orifice Size in. (mm) GG3107 2 – 4 (50 – 100) 0.007 (0.178) GG3207 4 – 6 (100 – 150) GG3307 6 – 8 (150 – 200) GG3209 4 – 6 (100 – 150) 0.
48 308936 The Graco W arranty and Disclaimers W ARRANTY Graco war ran ts al l eq uip men t manufactured by it and bearing its name to be free from defects in material and workman- ship on the date of sale by an authorized Graco distributor to the original purchaser for use.
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 Graco Inc. Pro AA4500 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 Graco Inc. Pro AA4500 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Graco Inc. Pro AA4500 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Graco Inc. Pro AA4500 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Graco Inc. Pro AA4500, 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 Graco Inc. Pro AA4500.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Graco Inc. Pro AA4500. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Graco Inc. Pro AA4500 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.
