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Grounding
3A2988B 9
Grounding
• Pump: use a ground wire and clamp as instructed
in your XM PFP sprayer operation manual.
• Air and fluid hoses: use only electrically conduc-
tive hoses with a maximum of 500 ft (150 m) com-
bined hose length to ensure grounding continuity.
Check electrical resistance of hoses. If total resis-
tance to ground exceeds 29 megohms, replace
hose immediately.
• Mix manifold and solvent flush system: use only
a Graco approved grounded solvent hose. Not all
heated hoses are grounded, and the mix manifold
primary ground is through the solvent hose. Ensure
that the solvent pump is properly grounded, as
instructed in your solvent pump manual. Ensure
there is electrical continuity from the spray tip to the
grounded solvent hose.
• Air compressor: Follow manufacturer’s recommen-
dations.
• Spray gun: ground through connection to a prop-
erly grounded fluid hose and pump.
• Fluid supply container: follow local code.
• Object being sprayed: follow local code.
• Solvent pails used when flushing: follow local
code. Use only conductive metal pails, placed on a
grounded surface. Do not place the pail on a non-
conductive surface, such as paper or cardboard,
which interrupts grounding continuity.
• To maintain grounding continuity when flushing
or relieving pressure: hold metal part of the spray
gun firmly to the side of a grounded metal pail, then
trigger the gun.
Flush Before Using
Equipment
The equipment was tested with lightweight oil, which is
left in the fluid passages to protect parts. To avoid con-
taminating your fluid with oil, flush the equipment with a
compatible solvent before using the equipment. See
Flush, page 11.
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes
to ignite or explode. Grounding provides an escape
wire for the electric current.