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.
| W |
Y | X |
| |
| Z |
864
Fig. 1
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.
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