Graco 3A0868G important safety instructions Purging Mixed Material, Purging Fluid Supply System

Models: 3A0868G

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Purging Mixed Material

There are times when you only want to purge the fluid manifold, such as:

end of potlife

breaks in spraying that exceed the potlife

overnight shutdown or end of shift

before servicing the fluid manifold assembly, hose or gun.

1.Press on Run Mix Spray (Screen 2) or from any screen to put the system in Standby.

2.Trigger the gun to relieve pressure.

3.If you are using a high pressure gun, engage the trigger lock. Remove spray tip and clean tip sepa- rately.

4.If using an electrostatic gun shut off the electrostat- ics before flushing the gun.

5.Set the solvent supply pressure regulator at a pres- sure high enough to completely purge the system in a reasonable amount of time but low enough to avoid splashing or an injection injury. Generally, a setting of 100 psi (0.7 MPa, 7 bar) is sufficient.

6.If using a gun flush box, place the gun into the box and close the lid.

7.Press on Run Mix Spray (Screen 2). The purge sequence automatically starts.

If the gun flush box is not used, trig- ger the gun into a grounded metal pail until the purge sequence is com- plete.

When done purging, the system automatically switches to Standby mode.

8.If the system is not completely clean, repeat step 6.

NOTE: If necessary, adjust purge sequence times so only one cycle is required.

Basic Operation

9.Trigger the gun to relieve pressure. Engage trigger lock.

10.If spray tip was removed, reinstall it.

11.Adjust the solvent supply regulator back to its nor- mal operating pressure.

NOTE: The system remains full of solvent.

NOTE: If your system uses 2 guns, you must trigger both guns simultaneously during a purge to purge both guns and lines. Verify that clean solvent flows from each gun. If not, repeat purge or clear clog/blockage in sys- tem.

Purging Fluid Supply System

Follow this procedure before:

the first time material is loaded into equipment

servicing

shutting down equipment for an extended period of time

putting equipment into storage

1.Press on Run Mix Spray (Screen 2) or from any screen to put the system in Standby.

2.Trigger the gun to relieve pressure.

3.If you are using a high pressure gun, engage the trigger lock. Remove spray tip and clean tip sepa- rately.

4.If using an electrostatic gun, shut off the electrostat- ics before flushing the gun.

5.Disconnect the component A and B fluid supplies at the pump inlets, and connect solvent supply lines.

6.Adjust the solvent fluid supply pressure. Use the lowest possible pressure to avoid splashing.

7.Remove the Control Box cover to access the sole- noid valves. See FIG. 19.

3A0868G

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Graco 3A0868G important safety instructions Purging Mixed Material, Purging Fluid Supply System