Graco Husky 1040 Instructions-Parts List Manual page 6

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 4.
The acetal pump contains stainless steel fibers which
make the wetted parts conductive. Attaching the
ground wire to the grounding screw will ground the air
motor and the wetted parts.
The polypropylene and PVDF pumps are not
conductive. Attaching the ground wire to the
grounding screw will ground only the air motor. 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. 2). 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
(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.
6 308443
-12
Siemans/meter
12
Ground all of this equipment.
•
Pump: Connect a ground wire and clamp as shown
in Fig. 1. Loosen the grounding screw (W). Insert
one end of a 12 ga (1.5 mm
(Y) behind the grounding screw and tighten the
screw securely. Connect the clamp end of the
ground wire to a true earth ground. Order Part
No. 222011 Ground Wire and Clamp.
NOTE: When pumping conductive flammable fluids with
a polypropylene or PVDF pump, always ground the
entire fluid system. See the WARNING at left. Fig. 2
shows a recommended method of grounding flammable
fluid containers during filling. This is only a guide;
contact your Graco distributor for assistance in
grounding your system.
Fig. 1
•
Air and fluid hoses: Use only grounded hoses with a
maximum of 500 ft (150 m) combined hose length to
ensure grounding continuity.
•
Air compressor: Follow the manufacturer's
recommendations.
•
All solvent pails used when flushing: Follow the local
code. Use only 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.
2
) minimum ground wire
Y
W