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Instructions
Manual Electrostatic
™
PRO Xs Waterborne
312900C
Air Spray Gun
ENG
For use with conductive spray materials (waterborne and other materials
less than 1 megohm-cm). For professional use ONLY.
For use in Class I, Div. I hazardous locations using Group D spray materials.
For use in Group II, Zone 1 areas using Group IIA spray materials.
II 2 G EEx 0.24 mJ
247936 Standard Model
247937 Smart Model
100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure
100 psi (0.7 MPa, 7 bar) Maximum Working
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Table of Contents Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Spray Pattern Troubleshooting . . . . . . . . . . . . . . . 25 Warning Symbol . . . . . . . . . . . . . . . . . . . . . . . . . 3 Gun Operation Troubleshooting . . . . . . . . . . . . . . 26 Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Gun Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Overview . . . . . . . . . . . . . . . . . . . . . . . .
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Warnings Warnings Warning Symbol Notice NOTICE WARNING A NOTICE alerts you to the possibility of damage to This symbol alerts you to the possibility of serious injury or destruction of equipment if you do not follow the or death if you do not follow the instructions. instructions. The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama- tion point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific
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Warnings WARNING W W WARNING ARNING ARNING EQUIPMENT MISUSE HAZARD Misuse can cause death or serious injury. � Do not operate the unit when fatigued or under the influence of drugs or alcohol. � Do not exceed the maximum working pressure or temperature rating of the lowest rated system com- ponent. See Technical Data in all equipment manuals. � Do not leave the work area while equipment is energized or under pressure. Turn off all equipment and follow the Pressure Relief Procedure in this manu
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Overview Overview How the Electrostatic Air Spray Gun Works The air hose supplies air to the spray gun. Part of the air The pump supplies fluid to the hose and gun, where the operates the turbine and the rest of the air atomizes the fluid is atomized by the air cap and the atomized parti- fluid being sprayed. The turbine generates power, which cles are electrostatically charged as they pass the is converted by the power cartridge to supply high volt- external charging probe. The charged fluid
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Overview A. Air swivel inlet. Left-hand thread. ti1254a A B. Fluid inlet. ti1254a B C. Turbine air exhaust. ti1254a C D. Air cap and nozzle. See page 13 for sizes. ti1255a D E. Fluid needle. Shuts off fluid flow and provides a ground point. E ti1256a 6 312900C
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Overview F. Fluid adjustment valve. Adjusts fluid needle travel. 0 100% KV a Use only in low flow conditions, to reduce needle MAX FLUID wear. WPR: 100 PSI HI (7bar, 0.7 Mpa) LO ES MAX AIR WPR: 100 PSI (7bar, 0.7 Mpa) ES I O F G. Fan air adjustment valve. Adjusts fan size and 0 100% KV shape. a MAX FLUID WPR: 100 PSI HI (7bar, 0.7 Mpa) LO ES MAX AIR WPR: 100 PSI G (7bar, 0.7 Mpa) I O ES H. Atomizing air restrictor valve. Restricts atomizing air f
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Overview J. ES indicator (247936 only). Green when ES is ON (I). MAX FLUID WPR: 100 PSI (7bar, 0.7 Mpa) J 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 ti12581 Voltage K. Voltage (247937 only). Shows voltage and K current. Green/yellow=spray, 0 100% KV a red=see Electrical Troubleshooting, page 22. MAX FLUID WPR: 100 PSI HI (7bar, 0.7 Mpa) Current LO ES MAX AIR WPR: 100 PSI (7bar, 0.7 Mp
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Installation Installation Install the System Warning Sign Mount warning signs in the spray area where they can easily be seen and read by all operators. An English Warning Sign is provided with the gun. Installing and servicing this equipment requires access to parts which may cause electric shock or Ventilate the Spray Booth other serious injury if work is not performed properly. � Do not install or service this equipment unless you are trained and qualified. � Be sure your installation
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Installation a m d c‡ c‡ o b‡ ES ON/OFF valve: ‡e h I is ON, O is OFF ti12721 j‡ f l g v s g ‡r w p k n u‡ q‡ t ti1498ax Fig. 1. Typical Installation Key r‡ Graco Grounded Air Hose a Main Air Supply Line s Electrostatic Air Spray Gun b‡ Ventilation Fan Interlock Solenoid Valve t Air Line Drain Valve c‡ Main Air Supply Shutoff Valve (bleed-type) u‡ Fluid Drain Valve d Pump Air Line Filter/Water Separator vGun Air Inlet e‡ Pump Air Supply Shutoff Valve (bleed-type) w Gun Fluid Inlet f Air Line Lu
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Installation 5. Install an air shutoff valve (P) on each gun air supply Connect the Air Line line to shut off air to the gun(s). Connect the Charging Probe To reduce the risk of electric shock or other serious 1. Apply dielectric grease to probe socket. injury, the air supply hose must be electrically con- nected to a true earth ground. Use only Graco Grounded Air Supply Hose. 1. Connect the Graco Grounded Air Supply Hose (R) between the air supply line and the gun's air inlet (V) Probe Soc
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Installation Connect the Exhaust Tube Press the exhaust tube (38) onto the barbed adapter on the bottom of the gun handle. Secure the tube with the clamp (39) (FIG. 5). W Barbed adapter N ti1277 ti1277a FIG. 6 38 5. Before running any paint through the spray gun, flush it with a compatible solvent. 39 Filter the Fluid ti1275a FIG. 5 Install a fluid filter (K) to remove particles and sediment that could clog the spray nozzle. Connect the Fluid Line 1. Before connecting the fluid line (N),
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Installation Table 2: Air Caps Select a Fluid Nozzle and Air Pattern Shape Cap Recommended Fluids and Part No. and Length in. Production Rates (mm) The gun is supplied with Part No. 197266 Nozzle and Round end; Light to medium viscosity. 24A438 24A276 Air Cap. If you require a different size, refer to 15-17 (381-432) Up to 15 oz/min (450 cc/min) Table 1 and Table 2 , and instruction manual 309419, or Medium to high viscosity and consult with your Graco distributor. See Replace Air Round
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Installation � All persons entering the spray area: shoes must Grounding have conductive soles, such as leather, or personal grounding straps must be worn. Do not wear shoes with non-conductive soles such as rubber or plastic. If gloves are necessary, wear the conductive gloves that are supplied with the gun. If non-Graco gloves Fire, Explosion, and Electric Shock Hazard are worn, cut off fingers or palm area of gloves to When operating the electrostatic gun, any ungrounded ensure your
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Installation Check Electrical Grounding BB Fire, Explosion, and Electric Shock Hazard Megohmmeter Part No. 241079 (AA-see FIG. 7.) is not approved for use in a hazardous area. To reduce the AA risk of sparking, do not use the megohmmeter to check electrical grounding unless: � The gun has been removed from the hazardous CC area; � Or all spraying devices in the hazardous area are turned off, ventilation fans in the hazardous area are ti1274a operating, and there are no flammable vapors in
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Installation 4. Fully open atomizing air restrictor valve. Check Fluid Viscosity To check fluid viscosity you will need: � a viscosity cup � a stopwatch. ti1272a 1. Completely submerge the viscosity cup in the fluid. Lift the cup out quickly, starting the stopwatch as soon as the cup is completely removed. 2. Watch the stream of fluid coming from the bottom of 5. Check that ES ON/OFF switch is OFF (O). the cup. As soon as there is a break in the stream, LO ES MAX AIR WPR: 100 PSI shut off
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Installation 7. Set gun air regulator to deliver minimum 40 psi (0.28 10. Turn ES ON/OFF switch ON (I). MPa, 2.8 bar) at gun when triggered, for maximum MAX FLUID transfer efficiency. See table at right. WPR: 100 PSI HI (7bar, 0.7 Mpa) LO ES MAX AIR WPR: 100 PSI (7bar, 0.7 Mpa) ES I O ti12732 TI1281A 11. Check that ES indicator or display is lit. If not, see Electrical Troubleshooting, page 22. Air Hose* Length Regulator Setting** ft (m) psi (MPa, bar) 15 (4.6) 50 (0.35,
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Installation Flush 3. Change fluid source to solvent, or disconnect fluid line and connect solvent supply line to gun. Fire, Explosion, and Electric Shock Hazard Read Fire and Explosion, and Electric Shock Hazards, page 3. Follow steps 1-6 below to flush the gun when using gun first time, changing colors, before fluid dries, at end of day, and before storing gun. NOTICE ti1287a This gun has nylon components which will be dam- aged if you use methylene chloride as a flushing or cleaning sol
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Pressure Relief 5. If the nozzle or hose is completely clogged or pres- Pressure Relief sure is not fully relieved, slowly loosen the hose end coupling. Now clear the nozzle or hose. Pressurized Equipment Hazard The system pressure must be manually relieved to ti1298a ti1298 prevent the system from starting or spraying acciden- tally. To reduce the risk of an injury from electric shock, accidental spray from the gun, splashing fluid, or mov- ing parts, follow the Pressure Relief Procedure Sh
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Maintenance Maintenance 4. Clean air cap, retaining ring, and nozzle with soft Clean Gun Daily brush and non-conductive, compatible solvent. 1. Flush, page 18. ti1297a 2. a. Clean outside of gun with non-conductive, compatible solvent. Point gun down. b. Use soft, damp cloth. 5. Clean probe with soft brush and compatible solvent. c. Do not immerse gun. ti12716 ti1295a ti1292a 6. Use toothpick or other soft tool to clean air cap holes. Do not use metal tools. ti1293a ti1294a 7. Reinstall air
