Graco PrecisionMix ii, Instructions And Parts List

Page: 76 / 260

Operation 4–10
Operation
Purging the PrecisionMix II 3K System
WARNING
FIRE AND EXPLOSION HAZARD
To reduce the risk of fire, explosion and
serious injury when purging the Preci-
sionMix II 3K:
Be sure the entire system and flush-
ing pails are properly grounded.
Follow the instructions in your separate gun
manual for safely grounding your gun while
purging.
WARNING
INJECTION HAZARD
To reduce the risk of a serious injury
from injection or splashing fluid:
Follow the Pressure Relief Proce-
dure on page 4–3 whenever you
are instructed to relieve the pressure.
If you are using a high pressure gun*, remove
the spray tip before purging. Relieve pressure
before removing the spray tip.
Wear protective eyewear.
Use the lowest possible fluid pressure when
purging.
Purge the system during initial startup, at the end of
each workday, and before any break longer than the
pot life of the fluid.
Solvent may be used to purge all three components,
but this will result in longer purge sequences and high
solvent usage. Call your Graco distributor before
choosing this option.
Recipe Zero
If you are using integrated color change, you
can use Recipe 0 to also purge the color
change stacks. Refer to page 9–4.
Recipe zero is considered the “Purge Down”
recipe. The purpose of this recipe is to allow
the user to purge out the material lines and the
mixed material lines without loading a new
color.
A typical use for recipe zero is at the end of a
shift. The operator performs a color change to
recipe zero and the lines are cleaned out to
prevent hardening of catalyzed material
between shifts.
Multiple Purge Downs may also be performed if
the lines are not sufficiently clean. Another
Purge Down is triggered by pressing the Enter
key on the Operator Station or by setting the
the color change bit on the I/O high.