Graco 307707ZAP - High-Flo Series Surge Tanks User Manual

Ground the tank and the rest of your system. See Fire
and Explosion Hazard on page 4.

Static electricity is generated by the flow of fluid
through the pump and hose, but it is dissipated
through proper grounding. If every part of the spray
system is not properly grounded, sparking may occur,
and the system may become hazardous. Sparking
may also occur when plugging in or unplugging a
power supply cord. Sparks can ignite fumes from
solvents and the fluid being sprayed, dust particles and
other flammable substances, and can cause a fire or
explosion and serious injury and property damage.

If you experience any static sparking or feel even a
slight shock while using this equipment, stop spraying
immediately. Check for proper grounding of the entire
system. Be sure you have corrected the problem
before starting to spray again.

Ground the pump and all other spray equipment used
or located in the spray area. The following are
minimum requirements for grounding a basic spray
system. Your system may include other equipment or
objects which must also be grounded. Always check
your local electrical code for detailed grounding
instructions. Be sure your system is connected to a
true earth ground.



Pump: Ground by using a ground wire and clamp
as described in your separate pump instruction
manual.



Air compressors and hydraulic power supplies:
Follow the manufacturer’s recommendations.



All air and fluid lines: Use only grounded hoses with
a maximum of 150 m (500 ft) combined hose length
to ensure grounding continuity. See Hose
Grounding Continuity on page 5.



Surge tank: Connect a ground wire and clamp as
shown in Fig. 1. Loosen the grounding screw (W).
Insert one end of a 1.5 mm

2

 (12 ga.) minimum

ground wire (Y) behind the grounding screw and
tighten the screw securely. Connect the clamp end
of the ground wire to a true earth ground. Order
Part No. 222011 Ground Wire and Clamp.



Spray gun: Obtain grounding through connection to
a properly grounded fluid hose and pump.



Object being sprayed: Ground according to local
code.



Fluid supply container: Ground according to local
code.



All solvent pails used when flushing must be
grounded according to local code. Use only
grounded metal pails, which are conductive. Do not
place the pail on any non-conductive surface, such
as cardboard or paper, which would interrupt
grounding continuity.



To maintain grounding continuity when flushing or
relieving pressure, always hold a metal part of the
gun firmly to the side of a grounded metal pail, then
trigger the gun.

Y

W

Proper hose grounding continuity is essential to
maintaining a grounded spray system. Check the
electrical resistance of your air and fluid hoses at least
once a week. If your hose does not have a tag on it
which specifies the maximum electrical resistance,
contact the hose supplier or manufacturer for the
maximum resistance limits. Use a resistance meter in
the appropriate range for your hose to check the
resistance. If the resistance exceeds the
recommended limits, replace the hose immediately. An
ungrounded or poorly grounded hose can make your
system hazardous.

Before flushing, be sure the entire system and flushing
pails are properly grounded, and be sure that pressure
is relieved. See Grounding  and Pressure Relief
Procedure on page 9.