Purging - Graco ProMix 2KS Operation

Purging

Read Warnings, page 8. Follow the Grounding
instructions in your system Installation manual.
To avoid splashing fluid in the eyes, wear eye protec-
tion.
There are 4 purging procedures in this manual:
• Purging Mixed Material (below)
• Purging Using Recipe 0 (page 56)
• Purging Fluid Supply System (page 56)
• Purging Sampling Valves and Tubes (page 58)
Use the criteria listed in each procedure to determine
which procedure to use.
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
• before servicing the fluid manifold assembly, hose or
gun.
Solvent purges the component B (catalyst, right) side of
the mix manifold and the inner tube of the integrator. Air
purges the component A (resin, left) side and the outer
tube of the integrator.
1. Press the Standby
Trigger the gun to relieve pressure.
If you are using a high pressure gun, engage the trig-
ger lock. Remove spray tip and clean tip separately.
312776B
key on the Booth Control.
If using an electrostatic gun shut off the electrostatics
before flushing the gun.
2. 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.
3. If using a gun flush box, place the gun into the box
and close the lid. Press the Purge
Booth Control. 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 Booth Control automati-
cally switches to Standby mode.
4. If the system is not completely clean, repeat step 3.
NOTE: If necessary, adjust purge sequence so only
one cycle is required.
Trigger the gun to relieve pressure. Engage trigger
lock.
5. If spray tip was removed, reinstall it.
6. Adjust the solvent supply regulator back to its nor-
mal operating pressure.
System Operation
key on the
55