5
306-993
Setup
Grounding
WARNING
FIRE AND EXPLOSION HAZARD
Before operating the pump, ground the
system as explained below. Also read
the section
FIRE OR EXPLOSION
HAZARD
on page 4.
Although water generally provides a natural electrical
ground, the following equipment must be grounded if
the cleaning chemical are volatile.
1.
When cleaning in enclosed areas, such as storage
tanks, locate the pump and air compressor outside
the area and well away from it. Provide adequate
ventilation. If the area you are cleaning has stored
flammable materials. take appropriate precautions
to avoid static sparking. Consult your local codes.
2.
Pump: use a ground wire and clamp. See Fig. 1.
Loosen the grounding lug locknut (W) and washer
(X). Insert one end of a 1.5 mm
(12 ga) minimum
ground wire (Y) into the slot in lug (Z) and tighten
the locknut securely. Connect the other end of the
wire to a true earth ground. Order Part No.
237–569 Ground Wire and Clamp.
Fig. 1
W
X
Y
Z
3.
Air and fluid hoses: use only electrically conductive
hoses.
4.
Air compressor: follow manufacturer’s recommen-
dations.
5.
Spray gun: ground through connection to a prop-
erly grounded fluid hose and pump.
6.
Fluid supply container: follow your local code.
7.
Object being sprayed: follow your local code.
8.
Solvent pails used when flushing: follow your local
code. Use only metal pails, which are conductive,
placed on a grounded surface. Do not place the
pail on a nonconductive surface, such as paper or
cardboard, which interrupts the grounding continu-
ity.
9.
To maintain grounding continuity when flushing or
relieving pressure, hold a metal part of the spray
gun firmly to the side of a grounded
metal pail,
then trigger the gun.
General Information
The typical setup shown in Figure 2 is only a guide to
selecting and installing required and optional compo-
nents. For assistance in designing a system to suit
your needs, contact your Graco representative. Refer
to Figure 2 for callouts in parentheses.
