308783
27
Ratio Check
15.
Always purge the ratio check valves after a
ratio check.
a.
Make sure both component A and B fluid
shut-off valves (T
-A
, T
-B
) are still closed.
b.
Place an empty beaker under each ratio check
valve.
c.
Hold down the ratio valve purge key
to
open the solvent valve.
NOTE:
If the purge valve does not remain
open while the key is pressed, service the fluid
dispense valves.
d.
Slowly open the component B ratio check
valve (W
-B
) one-half turn to one full turn. Purge
until clean solvent flows from the check valve,
then close the valve.
e.
Open the component B fluid shut-off valve
(T
-B
) , and trigger the gun until clean solvent
flows from it.
f.
Fully open the component A fluid shut-off valve
(T
-A
), and slowly open the component A ratio
check valve (W
-A
) one-half to one full turn.
Purge until clean solvent flows from the check
valve, then close the valve.
Reference
T
-A
W
-A
T
-B
7384B
W
-B
g.
Release the ratio valve purge key
to close
the solvent valve.
16. Make sure both component A and B ratio check
valves (W
-A
, W
-B
) are closed and both fluid shut-
off valves (T
-A
, T
-B
) are fully open.
17. Touch the token to the setup contacts to save the
new value entered during the ratio check and exit
setup.
18. The control will retain the new value and return to
operation mode.
19. Purge the system as instructed on page 23 if you
are not loading paint into the system to start
production. If you are starting production, follow
the purging procedure on page 22.
20. Before you begin production, clear the system of
solvent and prime it with material by turning the
operator switch to mix and triggering the gun into
a grounded waste container until mixed material
comes out of the gun nozzle. The system is now
ready to apply material.
7476A
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