Graco EQ300C manual Pneumatic Blast Control Circuit

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Pneumatic Blast Control Circuit

1.At the Air-Relay, disconnect the push-to-connect tubing and check the trigger circuit (from the blast control handle).

Troubleshooting

2.With the blast control activated, confirm that there is air flowing from the disconnected tube.

NOTE: The air flow should be at supply air pressure but the air volume is reduced due to the size of the fittings and tubing. If you do not get supply air pressure, check the blast control handle for proper operation, and check the blast control hoses to make sure they are not kinked or internally blocked.

3.Check the in-line filter at the industrial interchange nipple connection on the side of the panel (where you attach the blast control hose).

4.If the previous steps do not fix the issue, replace the air relay (Kit EQ5179).

334667B

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Contents EcoQuip Vapor Abrasive Blast System Important Safety InstructionsRelated Manuals ModelsDust and Debris Hazard Burn Hazard OEM System Guidelines MetricCompressor Size and Hose Length Minimum ID Metric EQ300C and EQ600C System Component IdentificationDataTrak Controls KeyDataTrak see DataTrak Controls, Pressure Relief Procedure Operation Checklist Before StartingConnecting the Blast Hose and Air Hose Setting Up the Equipment 10 gal 200-500 lb Ti24824a 0 0 0 8 8 0 0 0 3 Blasting on Higher Surfaces Blasting TipsSteel Metering Valve SettingsGrit Size Blast Pressure Abrasive Dose Blast Angle General WoodUsing the Wash Feature Refilling the Pot with Abrasive Shutting Down Operation Winterizing the Equipment See Repairing the Main Air Regulator TroubleshootingProblem Cause Solution See Cleaning the Auto-Vent Valve,Intact. See Hose Schematic, See Setting Up the Equipment,See Repairing the Diaphragm Valve Procedure see Shutting Down,Setting Up the Equipment, Properly. See Hose Schematic,Metering Valve Settings, See Pressure Relief Procedure,If flushing does not solve the problem, see Checking for Leaks Troubleshooting ExamplesPneumatic Blast Control Circuit Repairing the Main Air Regulator Perform Pressure Relief Procedure,Repair Flushing the Diaphragm Valve Perform the Pressure Relief Procedure, Repairing the Diaphragm ValveCleaning the Auto-Vent Valve Replacing the DataTrak Battery Replace BatteryApproved Batteries Replacing the DataTrak Fuse Replace FuseApproved Fuses DataTrak Part Series Letter Fuse Required EQ300C and EQ600C PartsPressure POT EQ300C and EQ600C Parts ListEnclosure Part Description Qty Enclosure Parts ListPressure Pot Parts List Pressure PotRef. Part Description Qty Hose Schematic Model Series Brakes Vapor Abrasive Blast Systems and AccessoriesEcoQuip Skid Systems EcoQuip Trailer SystemsModel Description Mobile/Skid UnitsTrailer Units ModelHoses NozzlesModel Description Type Length Blast Control Common Spare Parts Other AccessoriesDimensions Technical Specifications EQ300SEQ600S Graco Information Graco Extended Warranty for EcoQuip Components