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Installation
System Requirements
Basic Guidelines
When spraying waterborne fluids electrostatically:
•
The gun must be connected to a voltage isolation
system, which isolates the fluid supply from ground
and allows voltage to be maintained at the tip of the
gun.
•
The gun must be connected to a voltage isolation
system that will discharge the system voltage when
the gun is not in use.
•
There should be a bleed resistor to drain off the sys-
tem voltage when the spray gun is not in use.
•
All components of the voltage isolation system that
are charged to high voltage must be contained
within an isolation enclosure that prevents person-
nel from making contact with the high voltage com-
ponents before the system voltage is discharged.
•
The gun turbine air hose must be interlocked with
the voltage isolation system to shut off the turbine
air supply anytime the isolation system enclosure is
opened or entered.
•
The voltage isolation system must be interlocked
with the spray area entrance to automatically dis-
charge the voltage and ground the fluid whenever
someone opens the enclosure or enters the spray
area.
•
The system should not have any severe arcing
occurring when the isolation mechanism opens and
closes. Severe arcing will shorten the life of the sys-
tem components.
Graco Waterborne Fluid Hose
Use a Graco Waterborne Fluid Hose between the volt-
age isolation system fluid outlet and the gun fluid inlet.
See Accessories on page 57 for available hoses. The
hose consists of an inner PTFE tube, a conductive layer
covering the PTFE tube, and an outer cover.
333013B
Install the System
Installing and servicing this equipment requires
access to parts which may cause electric shock or
other serious injury if work is not performed properly.
• Do not install or service this equipment unless
you are trained and qualified.
• Comply with all applicable local, state, and
national fire, electrical, and other safety
regulations.
Warning Signs
Mount warning signs in the spray area where they can
easily be seen and read by all operators. An English
Warning Sign is provided with the gun.
Ventilate the Spray Booth
Provide fresh air ventilation to avoid the buildup of
flammable or toxic vapors when spraying, flushing,
or cleaning the gun. Do not operate the gun unless
ventilation fans are operating.
Electrically interlock the gun turbine air supply (B) with
the ventilators to prevent gun operation without ventilat-
ing fans operating.
NOTE: High velocity air exhaust will decrease the oper-
ating efficiency of the electrostatic system. Check and
follow all National, State, and Local codes regarding air
exhaust velocity requirements.
Air exhaust velocity of 100 ft/min (31 linear meters/min-
ute) should be sufficient.
Installation
11
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