Graco XP70 important safety instructions System Verification

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System Verification

System Verification

Graco recommends running the following tests daily.

Check for Normal Operation

Every time you start spraying:

•Watch the fluid gauges (AF). A pressure drop occurs during pump stroke changeover. It should be quick and synchronous.

•Stop the pumps on the upstroke. Check that both gauges hold pressure for at least 20 seconds. See Pump Troubleshooting on page 32.

NOTE: If one gauge drops, the others will rise.

•Stop the pumps on the downstroke. Check that all gauges hold pressure.

•If using feed pumps, check that both feed pumps run during the proportioner upstroke.

Mix and Integration Tests

Use the following tests to check for proper mix and inte- gration.

Butterfly Test

NOTE: Spots that take longer to cure indicate insuf- ficient pump loading, leakage, or lead/lag errors at a remote mix manifold.

Appearance Test

Spray material onto a metal substrate. Look for varia- tions in color, gloss, or texture that may indicate improp- erly catalyzed material.

Monitor Fluid Supply

NOTICE

To prevent pumping air into the system and cause incorrect proportioning, never allow the feed pump or solvent pump containers to run dry.

An empty pump will quickly accelerate to a high speed, and may damage itself and the other displacement pump because it causes a pressure rise in the other pump. If a supply container runs dry, stop the pump immediately, refill the container, and prime the system. Be sure to eliminate all air from the system.

Check Pot Life

Check the fluid manufacturer's instructions for fluid pot life at your fluid temperature. Flush mixed fluid out of the mix manifold, hose, and gun before pot life time expires, or before a rise in viscosity affects the spray pattern.

At low pressure, and with the spray tip reversed, dis- pense a 1/2 in. (12.7 mm) bead of material onto foil until multiple changeovers of each pump have occurred. Fold the sheet of foil over the fluid then peel it back and look for unmixed material (appears marble-like), or color changes.

Curing Test

Spray a single continuous pattern on foil at typical pres- sure setting, flow rate, and tip size until multiple change- overs of each pump have occurred. Trigger and de-trigger at typical intervals for the application. Do not overlap or cross over your spray pattern.

Check curing at various time intervals, listed on the material data sheet. For example, check for dry to touch by running your finger along the test pattern’s entire length at the time listed on the data sheet.

Ratio Check

Check the ratio at the mix manifold after any changes to the proportioning system. Use Ratio Check Kit 24F375 to check the ratio at the mix manifold. See manual ratio check kit manual for instructions and parts.

NOTE: To prevent an inaccurate ratio check when feed pumps are used in your system, the feed pres- sure cannot be more than a maximum of 25% of the proportioner outlet pressure. High feed pressure can float the proportioner pump check balls, result- ing in an inaccurate ratio check. There must be back pressure on both sides of the mix manifold when checking the ratio.

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 optionalFlush Before Using Equipment Fluid Line AccessoriesOptional Accessories Air LineGrounding 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 Without Heat Recirculate or Re-Prime After a Pump Runs DryWith Heat Heat FluidSpray Side Mix Manifold Restriction Flush Mixed Material Follow Pressure Relief Procedure,Flush Mix Manifold, Hose, and Spray Gun Use Optional Solvent PumpGuidelines ProcedurePark ShutdownSystem Verification Maintenance Problem Cause Solution TroubleshootingPump Troubleshooting Remove Pump Assembly Pump AssemblyRemove Displacement Pump RepairAir Controls Replace Air Control AssemblyRemove Air Motor Replace Air Filter ElementAir 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 Calculate Fluid Outlet Pressure Pump Performance ChartsCalculate Pump Air Flow/Consumption 11 or 21 Mix Ratio31 Mix Ratio Pump Performance ChartsMix Ratio MPa BarPsig PressureNot Approved For Explosive Atmospheres Accessories and KitsAcceptable For Use in Explosive Atmospheres Psi MPa, bar Psi MPa, psi Gpm ltr/min Technical DataFloor Mounting Dimensions Top VIew DimensionsTop VIew Side VIewBare Proportioner Mounting Hole Dimensions Graco Information Graco Standard Warranty
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