Instruction/ maintenance manual of the product 247937 Graco
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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.
2 312900G T able of Contents W a rnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 How the Electrostatic Air Spra y Gun Works . . . . 5 Installation .
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.
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.
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.
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.
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 .
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.
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 .
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.
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.
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.
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 .
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.
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.
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.
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.
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.
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.
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.
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).
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.
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.
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) .
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.
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 .
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.
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).
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).
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.
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.
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 .
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.
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 .
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 .
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).
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).
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.
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.
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 .
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.
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.
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 .
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.
An important point after buying a device Graco 247937 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Graco 247937 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 Graco 247937 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Graco 247937 you will learn all the available features of the product, as well as information on its operation. The information that you get Graco 247937 will certainly help you make a decision on the purchase.
If you already are a holder of Graco 247937, 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 Graco 247937.
However, one of the most important roles played by the user manual is to help in solving problems with Graco 247937. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Graco 247937 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
