Graco 332564B important safety instructions Purging, Flush Mixed Material

Operation Using Automatic Display Module (ADM)

Purging

To purge one color and fill with a new color, see Color Change, page 87.

Flush Mixed Material

There are times when you only want to purge the remote mix manifold and the spray device, such as:

•end of potlife

•breaks in spraying that exceed the potlife

•overnight shutdown or end of shift

•before servicing the remote mix manifold, hose or gun.

1.Command the system to Standby.

2.If you are using a high pressure spray device or an electrostatic gun, shut off the atomizing air.

To reduce risk of fire and explosion, if using an electrostatic gun, shut off the electrostatics before flushing the gun.

3.Trigger the spray device to relieve pressure.

4.Set the solvent supply pressure regulator at the lowest pressure possible. Generally a setting of 25–50 psi (0.18–0.35 MPa, 1.8–3.5 bar) is sufficient.

5.Command the system to Purge A or Purge B. Trigger the spray device into a grounded metal pail until the purge sequence is complete. When done purging, the system automatically switches to Standby mode, signalling the spray device to stop spraying.

6.If the system is not completely clean, repeat Step 5.

NOTE: For optimal efficiency, adjust purge sequence times so only one cycle is required.

7.Trigger spray device to relieve pressure.

8.Adjust the solvent supply regulator back to its normal operating pressure.

NOTE: The remote mix manifold and gun remain full of solvent after purging.

22 332564B