Graco A-25 important safety instructions Primary Heater, Heater Element, Line Voltage

Page 28

Repair

Primary Heater

Read Warnings on page 4. Wait for heater to cool before repairing.

Heater Element

1. Turn main power OFF

. Disconnect power

supply.

2.Relieve pressure, page 13.

3.Wait for heaters to cool.

4.Remove heater shroud.

5.See FIG. 7. Disconnect heater element wires from heater wire connector. Test with ohmmeter.

Heater Rod
Element
Wattage	Ohms

1500	30-35

6.To remove heater element, first remove thermocou- ple (361) to avoid damage, see step 7, page 30.

7.Remove heater element (358) from housing (351). Be careful not to spill any fluid left in housing.

8.Inspect element. It should be relatively smooth and shiny. If there is a crusted, burnt, ash-like material adhered to element or sheath shows pitting marks, replace element.

9.Install new heater element (358), holding mixer (360) so it does not block thermocouple port (P).

10.Reinstall thermocouple, page 30.

11.Reconnect heater element leadwires to heater wire connector.

12.Replace heater shroud.

Line Voltage

The primary heaters output their rated wattage at 230 Vac. Low line voltage will reduce power available and the heaters will not perform at full capability.

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3A1570A

Image 28

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 Temperature Control Diagnostic Codes DataTrak 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 currentE06 Communication cable unplugged E05 Control board over temperatureE99 Loss of communication Pressure Relief ProcedureShutdown Before Beginning RepairParkFlushing Open CloseTroubleshooting ProblemsPower Pumps and PressuresProblem Cause Solution Problem Cause Solution ElectronicsProblem Cause Solution Heater See E04 Fluid Temperature SenSor FTS or thermocouple discon Hose Heat System Problem Cause Solution Repair Follow Pressure Relief Procedure,Disconnect 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 CircuitHeater Element Primary HeaterLine Voltage KW Dual Zone Heater Thermocouple ThermocoupleOvertemperature Switch Check Hose ConnectorsPins Result Heated HoseInstallation Fluid Temperature Sensor FTSTest/Removal Transformer Secondary Check Replace Transformer Transformer Primary CheckModel Secondary Voltage Replace Circuit Breaker Module Size ComponentPump Lubrication System Pump Lubrication SystemRefer to Reactor A-25 Wiring Schematic, Temperature DisplayFluid Inlet Strainer Screen Detail of Membrane Switches and Temperature Display Board Display ModuleReplace Battery Replace DataTrak Battery or FuseReplace 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 ScrewWheel Kit Temperature ControlRef. Part Description Qty Fluid Manifold Fluid Inlet KitKw Dual Zone Heater, 24J788 RingAir Motor Pump Assembly PLUG, PipeLength Connection Outside Ft m From Air Tubing ConnectionsColor 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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