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307745 5
Setup
NOTES:
D Reference numbers and letters in parentheses in
the text refer to the callouts in the figures and the
parts drawing.
D Accessories are available from your Graco repre-
sentative. If you supply your own accessories, be
sure they are adequately sized and pressure-rated
to meet the system’s requirements.
Grounding
FIRE AND EXPLOSION HAZARD
Before operating the pump, ground the
system as explained below. Also read
the section FIRE AND EXPLOSION
HAZARD on page 4.
WARNING
Proper grounding is an essential part of maintaining a
safe system.
To reduce the risk of static sparking, the mounting
cover and all electrically conductive objects or devices
in the spray area must be properly grounded. Check
your local electrical code for detailed grounding
instructions for your area and type of equipment.
Agitator and drum cover: Connect one end of the
ground wire (Y) to the ground connector (X) on the rim
of the drum cover. See Fig. 1. Connect the other end
of the ground wire to a true earth ground. See the
pump instruction manual (307986 for 230992, 307985
for model 230993, or 308793 for model 220575) for
instructions on grounding the pump.
Y
Fig. 1
X
Air and fluid hoses: Use only electrically conductive
hoses with 500 ft. (150 m) maximum combined hose
length to ensure grounding continuity.
Air compressor: Follow manufacturer’s recommenda-
tions.
Spray gun or dispensing valve: Ground through con-
nection to a properly grounded fluid hose and pump.
Object being sprayed: Follow your local code.
Fluid supply container: Follow your local code.
Solvent pails used when flushing: Follow your local
code. Use only metal pails, which are conductive,
placed on a grounded surface. Do not place the pail
on a nonconductive surface, such as paper or card-
board, which interrupts the grounding continuity.
To maintain proper grounding continuity when flushing
or relieving pressure, always hold the metal part of the
spray gun firmly to the side of a grounded metal pail,
then trigger the gun.
Positioning the Unit
Select a convenient location for the unit. The air
valves for the pump (37) and agitator (5) must be fully
accessible.
System Accessories
A bleed-type master air valve (N) and a fluid drain
valve (K) are required in your system. These
accessories help reduce the risk of serious injury,
including splashing of fluid in the eyes or on the
skin, and injury from moving parts if you are adjust-
ing or repairing the pump or agitator.
The bleed-type master air valve relieves air
trapped between this valve and the pump after the
air is shut off. Trapped air can cause the pump to
cycle unexpectedly. Locate the valve close to the
pump. A red–handled bleed–type ball valve is
supplied to relieve air trapped in the air motor.
The fluid drain valve assists in relieving fluid pres-
sure in the displacement pump, hose, and gun.
Triggering the gun to relieve pressure may not be
sufficient. Order Part No. 210071.
WARNING