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Installation
Grounding
Grounding
Grounding
The equipment must be grounded to reduce the
risk of static sparking and electric shock. Electric
or static sparking can cause fumes to ignite or
explode. Improper grounding can cause electric
shock. Ground all equipment, personnel, objects
being sprayed, and conductive objects in or close
to the spray area. The resistance must not exceed
1 megohm. Grounding provides an escape wire
for the electric current.
When operating the electrostatic gun, any
ungrounded objects (such as people, containers, and
tools) in the spray location can become electrically
charged.
The following are minimum grounding requirements
for a basic electrostatic system. Your system may
include other equipment or objects which must be
grounded. Your system must be connected to a
true earth ground. Check ground connections daily.
Check your local electrical codes and regulations for
detailed grounding instructions.
Isolation cabinet:
•
Connect the system ground
wire to a true earth ground. Do not disconnect or
tamper with the internal ground wire connections
inside the cabinet.
After grounding the system, check the resistance
between the exterior of the isolation cabinet and
a true earth ground. The resistance must be less
than 100 ohms.
•
Fluid supply:
Ground the fluid supply by connecting
a ground wire and clamp. See your fluid supply
instruction manual for grounding instructions.
Power supply:
•
The power supply is grounded
through the power cord to a grounded outlet.
Spray gun:
•
Ground the gun by connecting the
red-colored Graco grounded air hose (HG) to the
16
gun and connecting the air hose ground wire to a
true earth ground.
This electrostatic hand-held spraying equipment
could present hazards if it is not operated according
to the information given in the spray gun instruction
manual. See
Related Manuals, page
Object being sprayed:
•
clean and grounded at all times.
All electrically conductive objects or devices in
•
the spray area:
These items must be properly
grounded.
Fluid and waste containers:
•
waste containers in the spray area. Do not use pail
liners unless they are conductive and grounded.
When flushing the spray gun, the container used
to catch the excess fluid must be electrically
conductive and grounded.
•
Air compressors:
Ground the equipment according
to the manufacturer's recommendations.
All air lines:
•
These must be properly grounded.
Use only grounded hoses with a maximum of 100
feet (30.5 m) combined hose length to ensure
grounding continuity.
3.
Keep the workpiece hangers
Ground all fluid and
3A7370B
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