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Grounding
WARNING
FIRE AND EXPLOSION HAZARD
This pump must be grounded. Before
operating the pump, ground the system as
explained below. Also read the section Fire
and Explosion Hazard on page 3.
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 18.
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
Fig. 3).
US Code (NFPA 77 Static Electricity) recommends a
conductivity greater than 50 x 10
(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
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 equipment.
NOTE: See the WARNING above. Fig. 3 shows a
recommended method of grounding flammable fluid
containers during filling.
8
308797
Installation
-12
Siemans/meter
12
Ground all of this equipment:
•
Pump: The metal pump has a grounding strip in front
of the center housing. Connect the non-clamp end of
the ground wire to the grounding strip 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 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.
GROUNDING A PUMP
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)
Hose must be conductive.
1
Dispense valve nozzle must be in contact with container
2
Y
Z
Fig. 3
.
Y
A
H
T
1
S
2
9
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