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Fluid Voltage Discharge and Grounding
Procedure
WARNING
ELECTRIC SHOCK HAZARD
The high voltage fluid supply is charged
with high voltage until the voltage is dis-
charged. Contact with the charged com-
ponents of the isolation system or spray gun elec-
trode will cause an electric shock. To avoid an elec-
tric shock, follow the Fluid Voltage Discharge
and Grounding Procedure:
D when instructed to discharge the voltage,
D before cleaning, flushing, or servicing the sys-
tem equipment,
D before approaching the front of the gun or the
gun-mounted fluid regulator,
D and before opening the safety fence or the
enclosure for the isolated fluid supply.
NOTE: An accessory grounding rod, part no. 210084,
is available to discharge any voltage remaining on a
system component. Contact your Graco representative
to order it.
1. Turn off the turbine air to all of the spray guns
connected to the isolated fluid supply.
2. Discharge the voltage at the voltage isolation
system by following the procedure specified in the
voltage isolation system instruction manual.
3. Touch the electrode of the gun with a grounded rod
to make sure that the voltage has been dis-
charged. If an arc is seen, verify that the electros-
tatics are turned off or see Electrical Trouble-
shooting, page 29, or the voltage isolation system
manual for other possible problems. Resolve the
problem before proceeding.
Operation
Pressure Relief Procedure
reduce the risk of an injury from accidental spray
from the gun, splashing fluid, or moving parts, fol-
low the Pressure Relief Procedure whenever you:
D are instructed to relieve the pressure,
D stop spraying,
D check or service any of the system equipment,
D or install or clean the fluid nozzle.
1. Follow the Fluid Voltage Discharge and
Grounding Procedure, at left.
2. Relieve fluid pressure in the fluid supply and
voltage isolation system as instructed in their
instruction manuals.
3. Turn off the fluid supply to the gun.
4. Turn off all the air to the spray gun except the
cylinder air, which triggers the gun. If an air pilot
regulator is used in the system, the air pressure is
also needed at the regulator air inlet.
NOTE: The shut-off device must bleed the air out of
the system.
5. Trigger the gun into a grounded metal waste
container to relieve fluid pressure.
6. Turn off all the remaining air supplies to the gun.
7. Turn off the main air supply by closing the bleed-
type master air valve on the main air supply line.
Leave the valve closed until you are ready to spray
again.
WARNING
PRESSURIZED EQUIPMENT HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. To
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