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Graco 247936 manual

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Table of contents for the manual

  • Page 1

    For use with conductive spray material s (waterborne and other materials less than 1 megohm-cm). For professional use ONL Y . For use in Class I, Di v . I hazardous locations using Group D spra y materials. For use in Group II, Zone 1 areas using Gr oup IIA spra y materials. 247936 Standar d Model 247937 Smar t Model 100 psi (0.7 M P a, 7 bar) Ma x[...]

  • Page 2

    2 312900G T able of Contents W a rnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 How the Electrostatic Air Spra y Gun Works . . . . 5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Install the Sys tem . . . . . .[...]

  • Page 3

    Warnings 312900G 3 Wa r n i n g s The f ollowing warnings are fo r the setup , use, groundin g, maintenance , and repair of this equipme nt. The e xclama- tion point symbol ale r ts you to a gener al wa rning and the hazard symbols ref er to procedure-specific risks. When these symbols appear in the body of this man ual, ref er ba ck to these W ar [...]

  • Page 4

    Warnings 4 312900G W ARNING W ARNING W ARNING W ARNING EQUIPMENT MISUSE HAZARD Misuse can cause death or serious injur y . • Do not opera te the unit when f atigued or under the infl uence of drugs or alcohol. • Do not e xceed the maximum working pressure or te mperatur e rating of the low est rat ed system com- ponent. See Te c h n i c a l D a[...]

  • Page 5

    Overview 312900G 5 Overview How the Electr ostatic Air Spra y Gun W orks The air hose su pplies air to the sp ra y gun. P ar t of the air operat es the turbine a nd the rest of the air atomiz es the fluid being sp ra y ed. The tur bine generates power , which is conv er ted by the po wer cartr idge to supply high v olt- age current to the gun’ s [...]

  • Page 6

    Overview 6 312900G A. Air swivel inlet. Left-hand thread. B. Fluid inlet. C. T urbine air exhaust. D. Air cap and nozzle. See page 13 for siz es. E. Fluid needle. Shuts off fluid flow and pro vides a ground point. ti1254a A ti1254a B ti1254a C ti1255a D ti1256a E[...]

  • Page 7

    Overview 312900G 7 F. Fluid adjustment va lve. Adjusts fluid needle tra v el. Use only in low flo w cond itions, to reduce needle wear . G. Fan air adjustment v alve . Adjusts fan siz e and shape. H. Atomizing air restrictor v alve. Restr icts atomizing air flow . Replace with pl ug (included) if desired. I. ES ON/OFF switch. T ur ns electrostatics[...]

  • Page 8

    Overview 8 312900G J. ES indicator (247936 only). Green when ES is ON (I). K. V oltage (247937 only). Shows v oltage and current. Green/yello w=spra y , red=see Electrical T r oubleshooting , page 22. NO TE: Nor mal current dr aw f o r this model is higher and the yello w current bar will be lit. L. ES HI/LO switc h (247937 onl y). Sets v oltage to[...]

  • Page 9

    Installation 312900G 9 Installation Install the System F IG . 1. shows a typical e lectrostatic a ir spray system. It is not an actual system des ign. For assistance in designing a system to suit y our par ticular needs , contact yo ur Graco dist ributor . W arning Sign Mount warning signs in the spr a y area where they can easily be seen and re ad[...]

  • Page 10

    Installation 10 312900G Fig. 1. Typica l Installat ion Key a b‡ c‡ d ‡e f g h k m n o ‡r s u‡ v w c‡ g q‡ t p l j‡ ES ON/OFF valve: I is ON, O is OFF ti12721 ti1498ax a Main Air Supply L ine b‡ V entilation F an Interlock Solenoid V alve c‡ Main Air Supply Shutoff V alv e (blee d-type) d Pump Air Line Filt er/W ater Separator e?[...]

  • Page 11

    Installation 312900G 11 Connect the Air Line 1. Connect the Gr aco Grounded Air Supply Hose (R) between th e air supply line and the gun's air inle t (V) (F IG . 2). The gun air inlet f itting has a left -hand thread. Con nect the air supply ho se grou nd wire (Q) to a true ear th ground. 2. Install an air line filter/w ater separa tor (O) on [...]

  • Page 12

    Installation 12 312900G Connect the Exhaust T ube Press the e xhaust tube (38 ) onto the barbed a dapter on the bottom of th e gun handle . Secure the tube with the clamp (39) (F IG . 5). Connect the Fluid Line 1. Bef ore connecting the fluid line (N), b lo w it out with air and flush it with solvent. Use solv ent compatible with the fluid to be sp[...]

  • Page 13

    Installation 312900G 13 Select a Fluid Nozzle and Air Cap The gun is supplied with P ar t No. 197266 Nozzle and 24A276 Air Cap. If you require a different size, ref er to T able 1 and T abl e 2 , and instruction manual 309419, or consult with your Graco dist ributor . See Replace Air Cap/Nozzle on page 28. A wide pattern kit (P/N 24A43 1) is includ[...]

  • Page 14

    Installation 14 312900G Gr ounding The follo wing are minimum grou nding requ irements f or a basic elect rostatic sys tem. Y ou r system may include other equipment or objects which must be grounded. Check yo ur local ele ctrical code for detailed grounding instru ctions. Y our system must be connected to a true ear th ground. • Pump: ground t h[...]

  • Page 15

    Installation 312900G 15 Chec k Electrical Gr ounding 1. Hav e a qualified electr ician check the electr ical groundin g contin uity of the spra y gun and air hose . 2. T ur n the ES ON/OFF valve OFF . 3. T ur n off the air and fluid supply to the gu n. The fluid hose must not have any fluid in it. 4. Make sure the groun ded air hos e (R) is co nnec[...]

  • Page 16

    Installation 16 312900G Chec k Fluid Viscosity T o c heck fluid viscosity you will need: • a viscosity cup • a stopw atch. 1. Completely submerge the viscosity cup in th e fluid. Lift the cup out q uickly , star ting the stopwat ch as soon as the cup is completely remo v ed. 2. W atch the stream of flu id coming fro m the bottom of the cup . As[...]

  • Page 17

    Installation 312900G 17 7. Set gun air r egulator to deliver minimum 40 ps i (0.28 MP a, 2.8 bar) at gun when triggered, f or maximum transf er efficiency . See tab le at right. 8. Spra y test patter n . Check atomization. If over-atomi- zation occurs at minimum pressure, adjust restrictor v alv e. If atomization is inadequa te, incre ase air press[...]

  • Page 18

    Installation 18 312900G Flush 1. T ur n ES ON/OFF swi tch OFF (O). 2. Relie ve pressure , page 19. 3. Change fluid source to solv ent, or disconnect fluid line and connect solv ent supply line to gun. 4. P oint gun into grounde d metal pail. Flush until clean solvent flo ws from gun. 5. Relie ve pressure , page 19. 6. Hang gun from hook. Nozzle m u[...]

  • Page 19

    Pressure Relief 312900G 19 Pressure Relief 1. T ur n the ES ON/OFF valve OFF . 2. T ur n off the air bl eed v alv es to the f luid source and to the gun. 3. T r igger the gun into a g rounded met al wast e con- tainer to reliev e the fluid pressure. 4. Open the pump dr ain v alve , ha ving a waste con- tainer ready to catc h the drai nage. L ea v e[...]

  • Page 20

    Maintenance 20 312900G Maintenance Clean Gun Daily 1. Flush, p age 18. 2. a. Clean outside of gun with non-conductiv e, compatib le solv ent. P oint gun down. b . Use soft, damp cloth. c. Do not immerse gun. 3. Remove air cap . 4. Clean air cap , retaining ring, and nozzle with soft brush and non-conductiv e, compatible solv ent. 5. Clean probe wit[...]

  • Page 21

    Maintenance 312900G 21 Daily System Care 1. Relie ve pressure , page 19. 2. Clean fluid and air filt ers. 3. Chec k f or fluid leaks. Tighten all f ittings . 4. Clean wor kpiece hangers. Use no n-spar king t ools. 5. Chec k mo v ement of trigger (T) and va lve s (V). Lubricate if necessar y . ti1934 ti1291a ti1300a T V ti12658[...]

  • Page 22

    Electrical Troubleshooting 22 312900G Electrical T r oub leshooting NO TE: Check all possib le remedies in the T roubles hoot- ing Char t bef ore disassembling the gu n. * ES indicator light is off when the gun is triggered. Electric Shoc k Hazar d Installing and ser vicing th is equipment requires access to par ts which ma y cause an electric shoc[...]

  • Page 23

    Electrical Tests 312900G 23 Electrical T ests Electrical components inside the gun aff ect perf or mance and safety . The f ollowing procedures test the co ndition of the po wer supply (18), barrel (16) and charg ing probe (31), and elect rical cont inuity between componen ts. Use megohmmeter P ar t No . 241079 (AA) and an applied v oltage of 500 V[...]

  • Page 24

    Electrical Tests 24 312900G T est P ower Supply Resistance 1. Remov e the pow er supply ( 18), page 31. 2. Remov e the turbine alternator (19) from t he pow er supply , page 32. 3. Measure resist ance from th e pow er supply's g round strips (EE) to the condu ctiv e contact in the center of the pow er supply seal (FF) . See F IG . 11. 4. The r[...]

  • Page 25

    Spray Pattern Troubleshooting 312900G 25 Spra y P attern T r oubleshooting NO TE: Check all possib le remedies in the T roubles hoot- ing Char t bef ore disassembling the gun. NO TE: Some spra y patter n problems ar e caused b y the improper balance be tween air a nd fluid. Electric Shoc k Hazar d Installing and ser vicing th is equipment requires [...]

  • Page 26

    Gun Operation Tro ubleshootin g 26 312900G Gun Operation T r oub leshooting NO TE: Check all possib le remedies in the T roubles hoot- ing Char t bef ore disassembling the gu n . Electric Shoc k Hazar d Installing and ser vicing th is equipment requires access to par ts which ma y cause an electric shock o r other serious injur y if the work is not[...]

  • Page 27

    Gun Repair 312900G 27 Gun Repair Prepare the Gun f or Repair • Chec k all possible remedies in Gun Oper ation T roub leshooting bef ore disassemb ling the gun. • Use a vise with padded ja ws to pre vent damage to plastic par ts. • Lubricate the pow er supply seal (18a), some pa ck- ing rod par ts (26), and cer ta in fluid fitting s with diele[...]

  • Page 28

    Gun Repair 28 312900G Replace Air Cap/Nozzle 1. Prepare gu n f or repair page 27. 2. Remove probe. 3. Remove the retaining r ing (27 ) and air ca p (9). See F IG . 13. 4. P oint gun up and squeez e trigger while removin g the fluid nozzle (7) assembly wit h the mu lti-tool (37). Fig. 13. Replace Air Cap/Nozzle Use non-silicon e grease, P art No. 11[...]

  • Page 29

    Gun Repair 312900G 29 Remo ve Fluid P acking 1. Prepare t he gun f or repair , page 27 . 2. Remov e the air cap and fluid nozzle, page 28. 3. Remove the fluid needle, page 28. 4. Loosen the trigger scre ws (8) and tr igger (30). See F IG . 14. 5. Remove the pac king rod (26), using th e multi-tool (37). 6. Chec k all par ts f or wear or damage and [...]

  • Page 30

    Gun Repair 30 312900G Repair P acking Rod You may replace the packing rod as individ ual parts or as an asse mbly. The assembly is pre-adjusted at the factory for proper air lead and lag. The gun begins emit- ting air befo re the fluid is d ischarged and the f luid stops before the air flow st ops. To adjust the lead/ lag air flow: 1. Remove the sp[...]

  • Page 31

    Gun Repair 312900G 31 Remo ve Barrel 1. Prepare t he gun f or repair , page 27 . 2. Carefully loosen the n ut (54) fro m the brac ket fluid fitting (13) . Pull the tube (14 o r 50a) out of the fit ting. Mak e sure both f errules and the nut sta y with the tube. 3. Loosen the th ree scre ws (11). 4. Hold the gun ha ndle (17) with one hand a nd pull [...]

  • Page 32

    Gun Repair 32 312900G Remo ve and Replace P ower Suppl y • Inspect the gun handle pow er supply ca vity f or dir t or moisture. Clean w ith a clean , dr y rag. • Do not e xpose gasket (10) to solve nts. 1. Prepare gun f or service, page 27 . 2. Remov e the barrel (16), page 31 . 3. Grasp th e pow er supply (1 8) with yo ur hand. With a gentle s[...]

  • Page 33

    Gun Repair 312900G 33 Remo ve and Replace T urbine Alternator Replace turbine alter nator bearings after 2000 hours of operation. Or der Part No. 223688 Bearing Kit. 1. Prepare gu n f or repair , page 27. 2. Remov e the powe r supply/alternator assemb ly , page 32. 3. Disconnect the al ternator from the pow er supply , page 32. 4. Measure re sistan[...]

  • Page 34

    Gun Repair 34 312900G Repair Fluid Adjustment V alve 1. Prepare the gun f or repair , page 27. 2. Remove the fluid adjustmen t valv e (25). It can on ly be replaced as a complete assemb ly . See F IG . 20.. 3. Scre w the v alve (25) into the gun handle . T orque to 15-25 in-lb (1 .7-2.8 N•m). Fig. 20. Fluid Adjustment Valve Repair Air V alve 1. P[...]

  • Page 35

    Gun Repair 312900G 35 Remo ve and Replace Atomizing Air Restrictor V alve 1. Prepare t he gun f or repair , page 27 . 2. Remove the atomizing air restricto r valv e (2 3). Inspect the o-ring (23c*). Rep lace if necessary . See F IG . 22. 3. Install a new atomizing air restr ictor valv e (23), or disassemb le and repl ace par ts individually . The v[...]

  • Page 36

    Parts 36 312900G Pa r t s P art No. 247936 60 kV Electr ostatic Gun, Series A (Standar d model) See page 38 f or detail views of the alternator (19), f an adjustment v alv e (20), ES ON/OF F va lv e (22), and pac king rod (26). 27 30 10* 1 60 31 26 29 7 9 27a* 7a 7b 11 18 18a 8 20 25 15 21 24 14 19 6* 23 35 13 16 ti11932 4 54 24a* 32 55 53 3 22 Ref[...]

  • Page 37

    Parts 312900G 37 P art No. 247937 60 kV Elec tr ostatic Gun, Seri es A (Smart model) See page 38 f or detail views of the alternator (19), f an adjustment v alv e (20), ES ON/OF F va lv e (22), and pac king rod (26). 27 30 10* 1 60 31 26 29 7 9 27a* 7a 7b 11 18 18a 8 22 20 25 15 21 24 14 19 6* 23 35 13 16 ti12659 4 54 24a* 32 55 59 53 2 3 5 58 56 5[...]

  • Page 38

    Parts 38 312900G MAX FLUID WPR: 100 PSI (7bar, 0.7 Mpa) MAX AIR WPR: 100 PSI (7bar, 0.7 Mpa) To avoid shock or explosion •Use properly grounded air hose •Read instruction manual I O ES MAX FLUID WPR: 100 PSI (7bar, 0.7 Mpa) 100 % KV M a 0 HI LO ES I O ES MAX AIR WPR: 100 PSI (7bar, 0.7 Mpa) Ref. No. 26: P acking Rod 26h† 26f† 26c† 26d† [...]

  • Page 39

    Parts 312900G 39 P art No. 247936 60 kV Electr ostatic Gun, Series A (Standar d model) P art No. 247937 60 kV Elec tr ostatic Gun, Seri es A (Smart model) Ref. No. P art No. Description Qty 1 111157 FITTING, tube, fluid 1 2 197967 PLUG, handle 1 3 198058 SCREW , ca p , sock et head 1 4 185111 SPRING, compression 1 5 111450 P ACKING, o-ring (247937 [...]

  • Page 40

    Parts 40 312900G * Included in Air Seal Repair Kit 244781. † Included in Fluid Seal Repair Kit 244 911. ❖ Rubber seal is not remov able. ▲ Replacement W ar ning labels, sig ns, ta gs, and cards are a v ailab le at no cost. 26 24A331 NEEDLE; includes 26a-26h 1 26a 24A330 . NEEDLE, assembly 1 26b 185495 . HOUSING, packing 1 26c † 178763 . P A[...]

  • Page 41

    Accessories 312900G 41 Accessories Air Line Accessories AirFlex ™ Flex ible Gr ounded Air Hose 100 psi (7 bar , 0.7 MP a) Maximum W orking Pressure 0.315 in. (8 mm) I D; 1/4 npsm(f) x 1/4 np sm(f) left-h and thread 244963 6 ft (1.8 m) 244964 15 ft (4.6 m) 244965 25 ft (7.6 m) 244966 36 ft (11 m) 244967 50 ft (15 m) 244968 75 ft (23 m) 244969 100 [...]

  • Page 42

    Accessories 42 312900G Gun Accessories Gun Repair Kits 244781 Air Seal Repair Kit 244911 Fluid Seal Repair Kit Push/Pull Fan Air V alve 244912 F or quick change of f an size. ES Alwa ys On Kit 244913 Replaces inlet fitting with ball v alve to shut off air during flushi ng. Con v er ts ES ON/OFF valv e to always ON condition. Handle Grips 245263 Med[...]

  • Page 43

    Technical Data 312900G 43 Te c h n i c a l D a t a Category Data Maximum Working Flu id Pressure ... ............. ............. ....... 100 psi (0 .7 MP a, 7 bar) Maximum Working Air P ressure ...... ................. ............ ..... 100 ps i (0.7 MPa, 7 bar) Maximum Fluid Ope rating T emperature ................. ........... 120 ° F (49 ° C)[...]

  • Page 44

    All written and visual data contained in this document reflects the latest product information available at the time of publica tion. Graco reserves the right to make changes a t any time without notice. Original instructions. This manual contains English. MM 312900 Graco Headquarters: Minneapolis International Offices: Belgium, China, Japan, Korea[...]