Graco EcoQuip 300 Operation, Repair, And Parts page 16

Operation
12. When the water level reaches the pop-up gasket,
rotate the handle to release the pop-up pin.
NOTE: Make sure pop-up gasket is clean of all
NOTE: NOTE:
debris.
13. Turn the selector valve to FILL.
NOTE: The water pump should begin cycling. If NOTE: NOTE:
not, open the pot pressure regulator enough to
cause the pump to run at 60 cpm.
NOTE: The auto vent/purge valve will allow all
NOTE: NOTE:
of the air trapped in the top of the pot to vent.
When air stops venting, the pot pressure gauge
will start to register pressure.
16
14. Wait for pot pressure to increase.
NOTE: NOTE: It can take up to several minutes for the NOTE:
pot to pressurize
NOTE: NOTE: NOTE: The bung cannot be pushed down unless
all of the pressure in the pot is released by
opening the dump valve.
15. Set the pot pressure 30 psi (2.0 Bar, 0.2 MPa)
higher than the intended blast pressure. Quickly
open and close the dump valve after the pump
stalls. Relieve pot pressure to 40 psi (2.7 Bar,
0.27 MPa) before closing the dump valve.
Repeat until pot pressure is consistent.
16. Turn the selector valve to WASH.
17. Set the blast air pressure 30 psi (2.0 Bar, 0.2
MPa) lower than the pot pressure while blasting.
NOTE: NOTE: In order to adjust the blast pressure, the NOTE:
blast control must be engaged. For the initial
setting, leave the abrasive ball valve closed.
NOTE: Engage and release the blast control
NOTE: NOTE:
handle each time the blast regulator is adjusted.
18. Turn the selector valve to BLAST.
ti24824a
334667G