FIRE AND EXPLOSION HAZARD
8 308981
Installation
Grounding
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.
ommended method of grounding flammable fluid con-
tainers during filling.
Ground all of this equipment:
•
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.
•
Air and fluid hoses
: Use only flexible, electrically
conductive hoses.
•
Air compressor
: Follow the manufacturer’s
recommendations.
•
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-conductive surface, such as paper or cardboard,
which interrupts the grounding continuity.
•
Fluid supply container
: Follow the local code.
9079A
2
A
H
S
T
Z
1
2
1
Y
Y
GROUNDING A PUMP
Hose must be conductive.
Dispense valve nozzle must be in contact with
container.
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
WARNING
This pump must be grounded. Before oper-
ating the pump, ground the system as
explained below. Also read the section
The acetal Husky 515 pump
contains stainless steel
fibers, which makes the wetted parts conductive.
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, always
ground the entire fluid system by making sure the fluid
system has an electrical path to a true earth ground
(see
). Never use a polypropylene 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/meter
(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-centime-
ters.
