16 308442
Operation
Pressure Relief Procedure
WARNING
PRESSURIZED EQUIPMENT HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. To
reduce the risk of an injury from accidental spray
from the gun, splashing fluid, or moving parts,
follow the Pressure Relief Procedure whenever
you:
are instructed to relieve the pressure,
stop spraying,
check or service any of the system equipment,
and install or clean the fluid nozzle.
1.
Turn off all the air to the spray gun except the
cylinder air, which triggers the gun. If an air pilot
fluid regulator is used in the system, the air pres-
sure is needed at the regulator air inlet.
2.
Turn off the fluid supply to the gun.
3.
Trigger the gun into a grounded metal waste
container to relieve fluid pressure.
4.
If the air pilot fluid regulator is used, turn off the air
pressure at the regulator air inlet.
5.
Relieve fluid pressure in the fluid supply equipment
as instructed in its instruction manual.
6.
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.
Operating Checklist
Check the following list daily, before starting to operate
the system, to help ensure you of safe, efficient opera-
tion.
____ 1.
All the operators are properly trained to
safely operate an automatic electrostatic air
spray system as instructed in this manual.
____ 2.
All the operators are trained how to properly
relieve pressure, using the Pressure Relief
Procedure at left.
____ 3.
The warning sign provided with the gun is
mounted in the spray area where it can be
easily seen and read by all operators.
____ 4.
The system is thoroughly grounded and the
operator and all persons entering the spray
area are properly grounded. See Ground
the System, page 13.
____ 5.
The condition of the electrical components of
the spray gun has been checked as
instructed in Electrical Tests, page 26.
____ 6.
The ventilation fans are operating properly.
____ 7.
The workpiece hangers are clean and
grounded. Contact points must be sharp
points or like knife edges.
____ 8.
All the debris, including flammable liquids
and rags, is removed from the spray area.
____ 9.
All flammable liquids in the spray booth are
in approved, grounded containers.
____ 10. All conductive objects in the spray area are
electrically grounded and the floor of the
spray area is electrically conductive and
grounded.
____
11. The manifold exhaust tubes have been
checked for the presence of any fluid as
instructed in Check for Fluid Leakage, page
22.
Selecting a Fluid Nozzle and Air Cap
WARNING
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of an injury, follow the Pressure
Relief Procedure, above, before removing or
installing a fluid nozzle and/or air cap.
The gun is supplied with a 0.059 in. (1.5 mm)) fluid
nozzle, part no. 191833, and air cap, part no. 193033.
If your application requires a different nozzle and air
cap combination, use instruction manual 307803 or
consult your authorized Graco distributor to select the
appropriate fluid nozzle and air cap. Install the air cap
and fluid nozzle into the gun barrel as instructed in Air
Cap/Nozzle/Resistor Stud Replacement, page 29.
