Graco A-25 important safety instructions Fluid Inlet Strainer Screen, Temperature Display

Page 36

Repair

Fluid Inlet Strainer Screen

The inlet strainers filter out particles that can plug the pump inlet check valves. Inspect the screens daily as part of the startup routine, and clean as required.

Isocyanate can crystallize from moisture contamination or from freezing. If the chemicals used are clean and proper storage, transfer, and operating procedures are followed, there should be minimal contamination of the A-side screen.

NOTE: Clean the A-side screen only during daily startup. This minimizes moisture contamination by immediately flushing out any isocyanate residue at the start of dispensing operations.

1.Close the fluid inlet valve at the pump inlet and shut off the appropriate feed pump. This prevents mate- rial from being pumped while cleaning the screen.

2.Place a container under the strainer base to catch drain off when removing the strainer plug (C).

3.Remove the screen (A) from the strainer manifold. Thoroughly flush the screen with compatible solvent and shake it dry. Inspect the screen. No more than 25% of the mesh should be restricted. If more than 25% of the mesh is blocked, replace the screen. Inspect the gasket (B) and replace as required.

4.Ensure the pipe plug (D) is screwed into the strainer plug (C). Install the strainer plug with the screen (A) and gasket (B) in place and tighten. Do not over- tighten. Let the gasket make the seal.

5.Open the fluid inlet valve, ensure that there are no leaks, and wipe the equipment clean. Proceed with operation.

A

B

C

Temperature Display

NOTICE

Before handling board, put on static conductive wrist strap to protect against static discharge which can damage assembly. Follow instructions provided with wrist strap.

1. Turn main power OFF

. Disconnect power

supply.

2.Relieve pressure, page 13.

3.Refer to Reactor A-25 Wiring Schematic, page 51.

4.Put on static conductive wrist strap.

5.Disconnect main display cable (106) at lower left corner of display module; see FIG. 15.

6.Remove screws (116) and cover (105); see FIG. 15.

7.Disconnect cable connector from back of tempera- ture display (102). See FIG. 15.

8.Disconnect ribbon cable(s) (R) from back of display; see FIG. 15.

9.Remove nuts (103) and plate (101).

10.Disassemble display, see detail in FIG. 15.

11.Replace board (102a) or membrane switch (102b) as necessary.

12.Reassemble in reverse order, see FIG. 15. Apply medium strength thread sealant where shown. Be sure display cable ground wire (G) is secured between cable bushing and cover (105) with screws (107).

D

FIG. 14. Fluid Inlet Strainer

Ti10974a

36

3A1570A

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Contents Important Safety Instructions Repair-PartsContents Proportioner Models SystemsRelated Manuals Manual DescriptionElectric Shock Hazard Fire and Explosion Hazard Equipment Misuse Hazard Important Two-Component Material Information Changing Materials DataTrak Diagnostic Codes Temperature Control Diagnostic CodesSymbol Code Code Name Diagnosis Cause E01 High fluid temperature Causes of E01 ErrorsSensor Connector Continuity Checks Pins Description Reading ChecksE02 High zone current E03 No zone currentE05 Control board over temperature E06 Communication cable unpluggedE99 Loss of communication Pressure Relief ProcedureShutdown Before Beginning RepairParkFlushing Open CloseTroubleshooting ProblemsPower Pumps and PressuresProblem Cause Solution Problem Cause Solution ElectronicsProblem Cause Solution See E04 Fluid Temperature Sen HeaterSor FTS or thermocouple discon Hose Heat System Problem Cause Solution Follow Pressure Relief Procedure, RepairDisconnect Pump Connect Pump Install Air Motor Remove Air MotorAir Filter Element Installation Recirculation / Over Pressure Relief BlockAir Inlet Filter / Water Separator Auto Drain Air Filter Element RemovalTemperature Control Module Temperature Control Module ConnectionsConnector Description Bottom of Power ModulesReplacing Temperature Control Assembly Modules Test SCR CircuitPrimary Heater Heater ElementLine Voltage KW Dual Zone Heater Thermocouple ThermocoupleOvertemperature Switch Check Hose ConnectorsPins Result Heated HoseFluid Temperature Sensor FTS InstallationTest/Removal Transformer Primary Check Transformer Secondary Check Replace TransformerModel Secondary Voltage Replace Circuit Breaker Module Size ComponentPump Lubrication System Pump Lubrication SystemTemperature Display Refer to Reactor A-25 Wiring Schematic,Fluid Inlet Strainer Screen Detail of Membrane Switches and Temperature Display Board Display ModuleReplace DataTrak Battery or Fuse Replace BatteryReplace Fuse Accessories Recommended Spare PartsParts 7984 100 888Torque pump locking nuts to 66-74 ft-lbs 90-100 Nm Part Description Qty CartNipple Control Panel ScrewTemperature Control Wheel KitRef. Part Description Qty Fluid Manifold Fluid Inlet KitKw Dual Zone Heater, 24J788 RingAir Motor Pump Assembly PLUG, PipeAir Tubing Connections Length Connection Outside Ft m FromColor Diameter Breaker Module Reactor A-25 Wiring Schematic PhasePOD Reactor A-25 Wiring Schematic Simplified Schematic, Heater Controls Technical Data Category DataGraco Standard Warranty Graco Information
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