Graco XP70 Recirculate or Re-Prime After a Pump Runs Dry, Without Heat, With Heat, Heat Fluid

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Recirculate or Re-Prime After a Pump Runs Dry

Without Heat

If using a system that does not require heat, recircula- tion is still required prior to spraying. Recirculation ensures that any settled fillers are mixed in, the pump lines are fully primed, and the pump check valves are operating smoothly.

Recirculation also allows you to re-prime one side that has run dry.

1.Follow Prime Empty Sprayer, page 21.

2.Close the dual shutoff handle (AE).

AC

AE

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3.Ensure the recirculation hoses (U) are in the correct hoppers (J).

U

J

4.Open the circulation valve handle (AC).

5.Turn down the air pressure regulator (CB) and then open the main air shutoff valve (CA). Use the air pressure regulator to slowly increase the air pres- sure to the pumps until they start running slowly.

CB

CA

Prime Empty Sprayer

6.If the pumps are running too quickly, adjust the main air regulator (CB) to regulate the cycle rate.

7.Run the pumps for a few minutes or until the mate- rial has reached the desired temperature. See Heat Fluid.

8.Close the main air shutoff valve (CA).

CA

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9. See Spray, page 24.

With Heat

Use the recirculation mode when heating the material is required. Note the temperature at the top of the heater (outgoing or back to the hopper). When the thermome- ter reaches operating temperature, the material is ready to spray.

Heat Fluid

To heat fluid evenly throughout the system:

1.Circulate the fluid at approximately 1/2 gpm (10-20 cycles/min.) to raise the temperature of the hoppers to 80-90° F (27-32° C).

2.Decrease the circulation rate to approximately 0.25 gpm (5 cycles/min.) to increase the heater outlet temperature to match the spray temperature.

NOTE: Circulating the fluid too quickly without decreasing the circulation rate will increase only the hopper temperature. Similarly, circulating fluid too slowly will increase only the heater outlet tempera- ture.

NOTE: Agitate, recirculate, and heat the material only as necessary to avoid mixing air into the fluid.

3A0420H

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Contents XP70 Plural-Component Sprayer Contents Manual Description Related ManualsFire and Explosion Hazard Skin Injection Hazard Toxic Fluid or Fumes Hazard Important Two-Component Material Information Machine Left Machine Right Market Equipment Designations Changing MaterialsB Component Designations Over Pressure Protection OverviewUsage Initial System Setup Bare Proportioning Pump Packages ModelsCart-Mounted XP70 Sprayers Mounting Components for Component IdentificationMain Air Controls Fluid Control AssemblyIncluded with optional solvent flush pump kit Key Solvent Flush Pump Kit 262393 optionalAir Line Fluid Line AccessoriesFlush Before Using Equipment Optional AccessoriesGrounding SetupLocation Hazardous location sprayers only Wire Sprayers with Explosion-Proof HeatersPosition Air Motor Air Motor PositionConnect Static Mixers, Gun, and Hoses Connect Air SupplyConnect Fluid Hose Bundles Remote Only Relieve a and B Fluid Pressure Pressure Relief ProcedurePrime a and B Fluids Prime Empty SprayerPrime Solvent Flush Pump Heat Fluid Recirculate or Re-Prime After a Pump Runs DryWithout Heat With HeatSpray Side Mix Manifold Restriction Use Optional Solvent Pump Follow Pressure Relief Procedure,Flush Mixed Material Flush Mix Manifold, Hose, and Spray GunGuidelines ProcedurePark ShutdownSystem Verification Maintenance Problem Cause Solution TroubleshootingPump Troubleshooting Repair Pump AssemblyRemove Pump Assembly Remove Displacement PumpReplace Air Filter Element Replace Air Control AssemblyAir Controls Remove Air MotorAir Flow Air Control AssemblyReplace Drain Valve Cartridges Mix Manifold AssemblyFluid Circulation Manifold Repair Solvent Pump HoppersReplace Service and RepairOptional Fluid Heaters Cart-Mounted XP70 Sprayer Parts49 a 49 B 27, 28 32 27 Part Description Qty Common PartsParts Varying by Model with No Hoppers Parts Varying by Model with Hoppers122 106 105 135 117 108 101 138 139 140 Bare Proportioning Pump Package571100 571150 571200 571250 571300 571400 Qty Varying PartsRatio Description Ref. No. Part No. Description Qty 202 211 205 209 210Part No. Description Qty Fluid ManifoldPump Filter O-rings packs Recommended Spare PartsPump Repair Kits 11 or 21 Mix Ratio Pump Performance ChartsCalculate Fluid Outlet Pressure Calculate Pump Air Flow/Consumption31 Mix Ratio Pump Performance ChartsMix Ratio Pressure BarMPa PsigNot Approved For Explosive Atmospheres Accessories and KitsAcceptable For Use in Explosive Atmospheres Psi MPa, bar Psi MPa, psi Gpm ltr/min Technical DataSide VIew DimensionsFloor Mounting Dimensions Top VIew Top VIewBare Proportioner Mounting Hole Dimensions Graco Information Graco Standard Warranty