Installation
System Requirements
Only one gun may be used per isolation cabinet.
The use of multiple guns can create a shock
hazard and may result in equipment damage.
A Graco voltage isolation system must have the
following features:
• An isolation enclosure that prevents persons from
making contact with the high voltage components
before the system voltage is discharged. All
components of the isolation system that are
charged to high voltage must be contained within
the enclosure.
• A bleed resistor to drain off the system voltage
when the spray gun is not in use. A metal part of
the fluid supply unit must be electrically connected
to the bleed resistor.
• A safety interlock that automatically discharges the
system voltage when anyone opens the isolation
enclosure.
NOTICE
The system should not have any severe arcing
occurring when the isolation mechanism opens
and closes. Severe arcing will shorten the life of
the system components.
NOTE: The Graco warranty and approvals are
void if the electrostatic spray gun is connected to a
non-Graco voltage isolation system or if the gun is
operated above 60 kV.
Warning Sign
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.
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.
• Be sure your installation complies with local,
state, and national codes for the installation
of electrical apparatus in a Class I, Div. I
Hazardous Location or Group II, Zone I
Explosive Atmosphere Location.
• Comply with all applicable local, state, and
national fire, electrical, and other safety
regulations.
Fig. 12 shows a typical electrostatic air-assisted
spray system. It is not an actual system design.
For assistance in designing a system to suit your
particular needs, contact your Graco distributor.
Ventilate the Spray Booth
Provide fresh air ventilation to reduce the risk of fire
or explosion caused by the buildup of flammable or
toxic vapors when spraying, flushing, or cleaning
the gun. Do not operate the gun unless ventilation
fans are operating.
Check and follow all local, state, and national codes
regarding air exhaust velocity requirements.
High velocity air exhaust will decrease the operating
efficiency of the electrostatic system. The minimum
allowable air exhaust velocity is 60 linear ft/min (18.3
linear meters/minute).
3A2497C
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