Installation
Ground
Ground
Ground The
The
The System
System
System
The equipment must be grounded to reduce the
risk of static sparking. Static sparking can cause
fumes to ignite or explode. Improper grounding
can cause electric shock.Grounding provides an
escape wire for the electrical current.
• Always
Always
Always ground the entire fluid system as
described below.
• Pumps with Polypropylene
Polypropylene
Polypropylene and
and
and PVDF
PVDF
PVDF fluid
sections are not
not
not conductive. Never
Never
Never use a
nonconductive polypropylene or PVDF pump
with flammable fluids.
• Follow your local fire codes.
Before operating the pump, ground the system as
explained below.
• Pump:
Pump:
Pump: All pumps have a ground screw. Loosen
the grounding screw. Insert one end of a 12–gauge
minimum ground wire behind the ground screw
and tighten the screw securely. Connect the clamp
end of the grounding wire to a true earth ground. A
ground wire and clamp, Part 238909, is available
from Graco.
• Motor:
Motor:
Motor: Motors have a ground screw in the electrical
box. Use it to ground the motor to the controller.
• Air
Air
Air Line
Line
Line and
and
and Fluid
Fluid
Fluid hoses:
hoses:
hoses: Use only grounded
hoses with a maximum of 500 ft (150 m) combined
hose length to ensure grounding continuity. Check
electrical resistance of hoses. If total resistance
to ground exceeds 29 megohms, replace hose
immediately.
• Fluid
Fluid
Fluid supply
supply
supply container:
container:
container: Follow local code.
• Solvent
Solvent
Solvent pails
pails
pails used
used
used when
when
when flushing:
flushing:
flushing: Follow local
code. Use only conductive metal pails, placed
on a grounded surface. Do not place the pail
on a nonconductive surface, such as paper or
cardboard, which interrupts grounding continuity.
• VFD:
VFD:
VFD: Ground the variable frequency drive through
a proper connection to a power source. Refer to
the VFD manual for grounding instructions.
Check your system electrical continuity after the
initial installation, and then set up a regular schedule
for checking continuity to be sure proper grounding
is maintained. The resistance should not exceed 1
ohm.
3A7036E
13
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