Operation; Pressure Relief Procedure; Flush The Equipment - Graco 224342 A Series Instructions Manual

Operation

Pressure Relief Procedure

Follow the Pressure Relief Procedure whenever
you see this symbol.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing
fluid and moving parts, follow the Pressure Relief
Procedure when you stop spraying and before
cleaning, checking, or servicing the equipment.
1. Engage the spray gun (M) trigger lock.
2. Close the bleed-type master air valve (D) to shut off
air supply to pump (A).
3. Disengage the spray gun trigger lock.
4. Hold a metal part of the spray gun (M) firmly to a
grounded metal pail. Trigger the gun to relieve
pressure.
5. Engage the spray gun trigger lock.
6. Open all fluid drain valves in the system, having a
waste container ready to catch drainage. Leave
drain valve(s) open until you are ready to spray
again.
7. If you suspect the spray tip or hose is clogged or
that pressure has not been fully relieved:
a. VERY SLOWLY loosen the tip guard retaining
nut or the hose end coupling to relieve pressure
gradually.
b. Loosen the nut or the coupling completely.
c. Clear the obstruction in the hose or tip.
308116V

Flush the Equipment

To avoid fire and explosion, always ground
equipment and waste container. To avoid static
sparking and injury from splashing, always flush at
the lowest possible pressure.
• Flush before changing colors, before fluid can dry
in the equipment, at the end of the day, before
storing, and before repairing equipment.
• Flush at the lowest pressure possible. Check
connectors for leaks and tighten as necessary.
• Flush with a fluid that is compatible with the fluid
being dispensed and the equipment wetted parts.
1. Perform Pressure Relief Procedure.
2. Remove spray tip and soak in solvent.
3. Hold a metal part of the spray gun (M) firmly to a
grounded metal pail.
4. Set pump (A) to lowest possible fluid pressure, and
start pump.
5. Trigger the spray gun until clean solvent dispenses.
6. Perform Pressure Relief Procedure.
Operation
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