16
307–934
Operation
Pressure Relief Procedure
WARNING
INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. Fluid
under high pressure can be injected through the
skin and cause serious injury. To reduce the risk of
an injury from injection, splashing fluid, or moving
parts, follow the
Pressure Relief Procedure
whenever you:
are instructed to relieve the pressure,
stop spraying,
check or service any of the system equipment,
or install or clean the spray tips.
1. Lock the gun trigger safety.
2. Shut off the main power to the heater, if used.
Circulate the fluid for at least 10 minutes to allow it
and the heater to cool.
3. Close the red-handled bleed-type master air valve
(G, supplied in your system).
4. Shut off the air regulators.
5. Unlock the gun trigger safety.
6. Hold a metal part of the gun firmly to the side of a
grounded metal pail, and trigger the gun to relieve
pressure.
7. Lock the gun trigger safety.
8. Open the drain valve (13, required in your system),
having a container ready to catch the drainage.
9. Leave the drain valve open until you are ready to
spray again.
10.
If you suspect that the spray tip or hose is com
-
pletely clogged, or that pressure has not been fully
relieved after following the steps above,
very
slowly
loosen the tip guard retaining nut or hose
end coupling and relieve pressure gradually, then
loosen completely. Now clear the tip or hose.
Flushing
WARNING
FIRE AND EXPLOSION HAZARD
Before flushing, read the section
FIRE
OR EXPLOSION HAZARD
on page 4.
Be sure the entire system and flushing
pails are properly grounded. Refer to
Grounding
on page 5.
Flush the pump:
Before the first use
When changing colors or fluids
Before fluid can dry or settle out in a dormant pump
(check the pot life of catalyzed fluids)
Before storing the pump.
CAUTION
Never leave water or water-base fluid in the pump
overnight. If you are pumping water-base fluid, flush
with water first, then with a rust inhibitor such as
mineral spirits. Relieve the pressure, but leave the
rust inhibitor in the pump to protect the parts from
corrosion.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure
on page this page.
1.
Relieve the pressure.
2. Remove the tip guard and spray tip from the gun.
See the gun instruction manual.
3. Fill the pail with solvent or place the suction tube in
a container of solvent.
4. Hold a metal part of the gun firmly to the side of a
grounded
metal pail.
5. Start the pump. Always use the lowest possible
fluid pressure when flushing.
6. Trigger the gun.
7. Flush the system until clear solvent flows from the
gun.
8.
Relieve the pressure.
Summary of Contents for Ratio President Hydra-Spray 222-294
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