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Empty and Flush Entire System (new sprayer or end of job)
3A0420H 27
Empty and Flush Entire System
(new sprayer 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.
• Cover fluid containers and use the lowest possi-
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.
• To only flush the fluid manifold, see Flush Mix
Manifold, Hose, and Spray Gun, page 26.
• If the machine is inoperable, use drain plugs on
the pump inlet fittings.
Guidelines
Flush new systems if the coating materials will be con-
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.
• anytime the sprayer will not be used for more
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.
Procedure
1. Follow Prime Empty Sprayer, page 21 and Flush
Mix Manifold, Hose, and Spray Gun, page 26, as
required.
2. Engage the trigger lock. Turn the main pump air reg-
ulator (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.
4. Open the circulation handle (AC). Increase the main
pump air regulator (CB) pressure to 20 psi (138 kPa,
1.38 bar).
5. Open the main air shutoff valve (CA).
NOTE: If the sprayer 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).
CB
TI1949a
r_571100_3A0420A_11a-1
U
CA