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Grounding
3A0590G 11
Grounding
• Pump: use ground wire and clamp as instructed in
your sprayer 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.
• 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
Flushing, page 13.
Ratio Check
Perform the ratio check procedure after any changes to
the proportioning system. Use Ratio Check Kit 24F375
to check the ratio at the mix manifold. See manual
3A0421 for instructions and parts.
Your system must be grounded. Read warnings in
your sprayer manual. Check your local electrical
code.
NOTICE
To prevent an inaccurate ratio check when feed
pumps are used in your system, the feed pressure
cannot be more than a maximum of 25% of the pro-
portioner outlet pressure while dispensing. High
feed pressure can float the proportioner pump
check balls, resulting in an inaccurate ratio check.