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8 308981
Installation
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
This pump must be grounded. Before
operating the pump, ground the system
as explained below. Also read the sec-
tion Fire and Explosion Hazard on page 3.
The acetal Husky 515 pump contains stainless
steel fibers, which makes the wetted parts conduc-
tive. Attaching the ground wire to the grounding
screw (106) grounds the wetted parts. See
grounding screw on page 25.
The metal Husky 716 pumps have a grounding
strip connecting the vee clamps (109). Attach a
ground wire to the grounding strip with the screw,
lockwasher, and nut as shown in the Grounding
Detail on page 27.
The polypropylene and PVDF Husky 515 pumps
are not conductive.
When pumping conductive flammable fluids, al-
ways ground the entire fluid system by making
sure the fluid system has an electrical path to a
true earth ground (see Fig. 3). Never use a poly-
propylene or PVDF pump with non-conductive
flammable fluids as specified by your local fire
protection code.
US Code (NFPA 77 Static Electricity) recommends
a conductivity greater than 50 x 10
–12
Siemans/me-
ter (mhos/meter) over your operating temperature
range to reduce the hazard of fire. Consult your
fluid supplier to determine the conductivity or
resistivity of your fluid. The resistivity must be less
than 2 x 10
12
ohm-centimeters.
To reduce the risk of static sparking, ground the pump
and all other equipment used or located in the pumping
area. Check your local electrical code for detailed
grounding instructions for your area and type of equip-
ment.
NOTE: When pumping conductive flammable fluids
with a polypropylene or PVDF pump, always ground
the fluid system. See the WARNING above. Fig. 3
shows a recommended method of grounding flam-
mable fluid containers during filling.
Ground all of this equipment:
D Pump: The metal pump has a grounding strip in
front of the center housing. The acetal pump has a
grounding screw on the top manifold. Connect the
non-clamp end of the ground wire to the grounding
strip or grounding screw, and connect the clamp
end of the ground wire to a true earth ground. To
order a ground wire and clamp, order Part No.
222011.
D Air and fluid hoses: Use only electrically conductive
hoses.
D Air compressor: Follow the manufacturer’s recom-
mendations.
D Solvent pails used when flushing: Follow the local
code. Use only grounded metal pails, which are
conductive. Do not place the pail on a non-conduc-
tive surface, such as paper or cardboard, which
interrupts the grounding continuity.
D Fluid supply container: Follow the local code.
9079A
KEY
A Pump
H Fluid drain valve (required)
S Dispense valve
T Fluid drain line
Y Fluid section grounding via grounding strip or grounding
screw (required for metal and acetal pumps)
Z Container ground wire (required)
Fig. 3
2
GROUNDING A PUMP
Dispense valve nozzle must be in contact with container.
A
H
S
T
Z
1
Hose must be conductive.
2
1
Y
Y