Graco 3A0420T 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 34.

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

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.

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 foil. Look for variations in color, gloss, or texture that may indicate improperly catalyzed material.

Monitor Fluid Supply

NOTICE

To prevent pumping air into the system, which causes 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.

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.

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Contents XP Proportioners Contents Related Manuals Fire and Explosion Hazard Skin Injection Hazard Toxic Fluid or Fumes Hazard Important Two-Component Material Information B Component Designations Changing MaterialsEquipment Designations Usage OverviewOver Pressure Protection Initial System Setup Cart-Mounted Systems ModelsPump Volume Max Fluid Max Air Mix Gallon Over Pressure Protection must be used, see Bare Proportioning Pump PackagesBuilding systems with bare proportioning pump PackagesMounting Components for Component IdentificationMain Air Controls Fluid Control AssemblyPump Key Solvent Flush Pump Kit 262393 optionalAir Controls Air Line Fluid Line AccessoriesFlush Before Using Equipment Optional AccessoriesLocation SetupGrounding Hazardous location systems only Wire Systems with Explosion-Proof HeatersCheck Motor Position Motor PositionChange Motor Position Connect Fluid Hose Bundles Remote Mix Manifold Only Connect Air SupplyConnect Static Mixers, Gun, and Hoses Relieve a and B Fluid Pressure Pressure Relief ProcedurePrime a and B Fluids Prime Empty SystemPrime Solvent Flush Pump Follow Prime Empty System, Heat FluidSpray Side Mix Manifold Restriction To Adjust the RestrictorUse Optional Solvent Pump Follow Pressure Relief Procedure,Flush Mixed Material Flush Mix Manifold, Hose, and Spray GunGuidelines ProcedurePark ShutdownSystem Verification Maintenance Problem Cause Solution TroubleshootingResin Pump Pump TroubleshootingHardener Pump Falling Trouble Area Resin Pump LeakageRepair Pump AssemblyRemove Pump Assembly Remove Displacement PumpReplace System Air Regulator Replace Air Control AssemblyRemove Motor Replace Air Filter ElementAir Flow Air Control AssemblyFluid Circulation Manifold with Over Pressure Relief Valves Mix Manifold AssemblyReplace Over Pressure Relief Valves Pressure Color Psi MPa, bar Use with Fluid Circulation Manifold Replacement GuideCirculation Target Opening Manifold ValveOptional Solvent Pump HoppersOptional Fluid Heaters Service and RepairReplace Cart-Mounted System PartsStandard Mix Manifold Models Quickset Mix Manifold Models Washer Parts Common to All Systems Description QtyParts Varying By Model XP35 Systems Ref Part Description Coupling 283101 283102 283201 283202 283301 283302 283401 283402 Parts Varying By Model XP70 Systems Part Description Model 571100 shown Bare Proportioning Pump PackageParts Varying by Pump Package Parts Common to All Pump PackagesQty Ref. No. Part No. Description Air ControlsManifold to also fit Series a XP Proportioners with Assembly 262784 XP35 262783 XP50 262806 XP70Fluid Circulation Manifold with Over Pressure Relief Valve Part Description Qty RefRecirculation/Overpressure valve see Recommended Spare PartsPump Repair Kits Pump Filter O-rings packsAcceptable For Use in Explosive Atmospheres Accessories and KitsNot Approved For Explosive Atmospheres Technical Data Top View DimensionsSide View Floor Mounting Dimensions, Top View Bare Proportioner Mounting Hole Dimensions Wall Mount Bracket 262812 Dimensions Hydraulic Unit Dimensions Floor Stand 24M281 DimensionsDimensions 3A0420T Graco Information Graco Standard Warranty
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