Graco 3A0420T Manual De Usuario
Empty and Flush Entire System (new system or end of job)
3A0420T
29
Empty and Flush Entire System
(new system or end of job)
(new system or end of job)
NOTE:
•
•
If the system includes heaters and heated hose,
turn them off and allow to cool before flushing.
Do not turn on the heaters until the fluid lines
are clear of solvent.
turn them off and allow to cool before flushing.
Do not turn on the heaters until the fluid lines
are clear of solvent.
•
Cover fluid containers and use the lowest possi-
ble pressure when flushing to avoid splashing.
ble pressure when flushing to avoid splashing.
•
Before color change or shutdown for storage,
circulate the solvent at a higher flow rate and for
a longer time. Change the solvent when it gets
dirty.
circulate the solvent at a higher flow rate and for
a longer time. Change the solvent when it gets
dirty.
•
To only flush the fluid manifold, see Flush Mix
Manifold, Hose, and Spray Gun, page 28.
Manifold, Hose, and Spray Gun, page 28.
•
If the machine is inoperable, use drain plugs on
the pump inlet fittings.
the pump inlet fittings.
Guidelines
Flush new systems if the coating materials will be con-
taminated by mineral oil.
taminated by mineral oil.
Flushing will help prevent materials from settling or gell-
ing in the pumps, lines, and valves. Flush the system
when any of the following situations occur.
ing in the pumps, lines, and valves. Flush the system
when any of the following situations occur.
•
anytime the system will not be used for more
than one week (depending on materials used)
than one week (depending on materials used)
•
if the materials used have fillers that will settle
•
if using materials that are moisture sensitive
•
before servicing
•
if the machine is going into storage, replace the
flush solvent with light oil. Never leave the
equipment empty of any fluid.
flush solvent with light oil. Never leave the
equipment empty of any fluid.
Procedure
1.
Follow
Mix Manifold, Hose, and Spray Gun, page 28, as
required.
required.
2.
Engage the trigger lock. Turn the main pump air
regulator (CB) fully counter-clockwise to shut off.
regulator (CB) fully counter-clockwise to shut off.
3.
Move the recirculation lines (U) to separate fluid
containers to pump remaining fluid out of the sys-
tem.
containers to pump remaining fluid out of the sys-
tem.
4.
Open the circulation handle (AC). See F
. 2 on
page 15.
5.
Increase the main pump air regulator (CB) pressure
to 20 psi (138 kPa, 1.38 bar).
to 20 psi (138 kPa, 1.38 bar).
6.
Open the main air shutoff valve (CA).
NOTE: If the system does not start with static pres-
sure, increase the air pressure by 5 psi (35 kPa,
0.35 bar) increments. To avoid splashing, do not
exceed 35 psi (241 kPa, 2.4 bar).
sure, increase the air pressure by 5 psi (35 kPa,
0.35 bar) increments. To avoid splashing, do not
exceed 35 psi (241 kPa, 2.4 bar).
CB
TI1949a
r_571100_3A0420A_11a-1
U
CA
CB