Recirculation / Over Pressure Relief Block | Graco A-25 manual

Recirculation / Over Pressure Relief Block

Valves can be serviced with the block on the machine (see page 46 for parts view). For thorough cleaning, remove the block assembly as follows.

1.Disconnect two fluid tubes connected to back of recirculation block (3).

2.Loosen and remove two screws (10) in back of recir- culation block.

10

3

ti17995a

FIG. 4

3.See Fluid Manifold, page 46. Clean and inspect all parts for damage. Ensure that the seat (8a) and gasket (8b) are positioned inside each valve car- tridge (8).

4.Apply PTFE pipe sealant to all tapered pipe threads before reassembling.

5.Reassemble in reverse order, following all notes on page 46.

Repair

Air Inlet Filter / Water Separator (Auto Drain)

Air Filter Element Removal

1.Close air inlet valve (302) on filter (301).

2.Hold in metal spring clip and twist black cover coun- terclockwise to remove.

302 301

ti17996a

FIG. 5

3.Unscrew clear drain cover by hand.

4.Unscrew black filter element retainer to remove ele- ment.

5.Inspect filter element. Clean or replace.

Air Filter Element Installation

1.Insert cleaned or replacement filter (114228).

2.Hand-screw filter retainer into place.

3.Hand-screw clear drain cover until tight.

4.Reposition black cover and turn. Make sure it “snaps” back into place.

3A1570A

25

Image 25

Graco A-25 Recirculation / Over Pressure Relief Block, Air Inlet Filter / Water Separator Auto Drain

Contents

Repair-Parts Important Safety Instructions Contents Systems Proportioner ModelsRelated Manuals Manual Description Electric 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 Causes of E01 Errors E01 High fluid temperatureSensor Connector Continuity Checks Pins Description Reading Checks E03 No zone current E02 High zone current E06 Communication cable unplugged E05 Control board over temperatureE99 Loss of communication Before Beginning Repair Pressure Relief ProcedureShutdown Open Close ParkFlushing Problems TroubleshootingPower Pumps and Pressures Problem Cause Solution Electronics Problem Cause Solution Problem 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 Remove Air Motor Install Air Motor Recirculation / Over Pressure Relief Block Air Filter Element InstallationAir Inlet Filter / Water Separator Auto Drain Air Filter Element Removal Temperature Control Module Connections Temperature Control ModuleConnector Description Bottom of Power Modules Test SCR Circuit Replacing Temperature Control Assembly Modules Heater Element Primary HeaterLine Voltage KW Dual Zone Heater Thermocouple Thermocouple Check Hose Connectors Overtemperature SwitchPins Result Heated Hose Installation Fluid Temperature Sensor FTSTest/Removal Transformer Secondary Check Replace Transformer Transformer Primary CheckModel Secondary Voltage Size Component Replace Circuit Breaker Module Pump Lubrication System Pump Lubrication System Refer to Reactor A-25 Wiring Schematic, Temperature DisplayFluid Inlet Strainer Screen Display Module Detail of Membrane Switches and Temperature Display Board Replace Battery Replace DataTrak Battery or FuseReplace Fuse Recommended Spare Parts Accessories 7984 100 888 Parts Torque pump locking nuts to 66-74 ft-lbs 90-100 Nm Cart Part Description Qty Nipple Screw Control Panel Wheel Kit Temperature ControlRef. Part Description Qty Fluid Inlet Kit Fluid Manifold Ring Kw Dual Zone Heater, 24J788 PLUG, Pipe Air Motor Pump Assembly Length Connection Outside Ft m From Air Tubing ConnectionsColor Diameter Breaker Module Phase Reactor A-25 Wiring Schematic POD Reactor A-25 Wiring Schematic Simplified Schematic, Heater Controls Category Data Technical Data Graco Information Graco Standard Warranty