Graco PRO AA4500 Instructions-Parts List Manual page 10

OPERATION
WARNING
Pressure Relief Procedure
To reduce the risk of serious injury, including fluid
injection, splashing in the eyes or on skin, or
electrostatic shock, always follow this procedure
whenever the
pump
is shut
off,
when checking or
servicing any part of system, when installing or
changing spray tips and whenever you stop
spraying.
1. Engage the spray gun trigger safety latch.
2. Turn
the
gun's ES ON-OFF lever to the
OFF
3. Shut off the power to the pump.
4.
Close
the bleed-type master air valve
See Fig
3 .
position.
(required in system).
5.
Close the air valve for the gun air supply line.
6. Disengage the gun trigger safety latch.
7. Trigger the
gun into a grounded metal waste
container to relieve fluid and air pressure.
8. Engage the gun trigger safety latch again.
9. Open the pump drain valve (required in sys-
tem) to help relieve fluid pressure in the dis-
valve connected to the fluid pressure gauge
placement pump. In addition, open the drain
relieve fluid pressure in the hose and gun.
(in
a
system with fluid regulation) to help
Triggering the gun to relieve pressure may
catch the drainage.
not be sufficient. Have a container ready to
10. Leave the drain valve@) open until you are
ready to spray again.
If you suspect that the spray tip or hose is com-
p\etely clogged or that pressure has not been
fully relieved afler following the steps above, very
slowly loosenthe hose end coupling and relieve
pressure gradually, then loosen completely. Now
clear the tip or hose obstruction.
Trigger Safety
Latch Disengaged
Trigger Safety
Latch Engaged
Fig 3
WARNING
To reduce the risk of serious injury, including fluid
injection, and splashing in the eyes or on the
skin:
1. Never use the gun with the tip guard
removed.
2. Never point the spray gun at anyone or any
part of the body or put your hand or fingers
over the spray tip when adjusting the spray
pattern or spraying fluid.
3. Always engage the trigger safety latch when
4. The
PRO
AA4500 spray gun has a 3000 psi
and 100 psi (7 bar) Maximum Working Air
(207 bar) Maximum Nuid Working Pressure
Pressure. Never exceed these pressures!
Never exceed the maximum air and fluid
working pressure of the lowest rated compo-
nent in your system.
you stop spraying. See Fig 3.
10 308-294