Operation; Pressure Relief Procedure; Operating Checklist; Selecting A Fluid Nozzle And Air Cap - Graco PRO 5500sc Instruction Manual

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, fol-
low 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 cyl-
inder air, which triggers the gun. If an air pilot fluid
regulator is used in the system, the air pressure 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 con-
tainer 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. Be sure all the operators are properly trained
to safely operate an automatic, electrostatic
air spray system as instructed in this manual.

Operation

____ 2. Be sure all the operators are trained how to
properly relieve system pressure as instructed
at left.
____ 3. Be sure 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. Be sure the system is thoroughly grounded.
See Ground the System, page 14.
____ 5. Be sure the operator and all persons entering
the spray area are properly grounded by wear-
ing shoes with conductive soles or personal
grounding straps.
____ 6. Be sure all the conductive objects in the spray
area are electrically grounded and the floor of
the spray area is electrically conductive and
grounded.
____ 7. Be sure all flammable liquids in the spray booth
are in approved, grounded containers.
____ 8. Be sure the workpiece hangers are clean and
grounded. Contact points must be sharp
points or knife edges.
____ 9. Be sure the ventilation fans are operating
properly.
____ 10.
liquids and rags, is removed from the spray
area.
____ 11.
for the presence of any fluid as instructed in
Check for Fluid Leakage, page 23.

Selecting a Fluid Nozzle and Air Cap

The gun is supplied with a 1.5 mm (0.06 in.) fluid
nozzle, P/N 185–158, and air cap, P/N 177–033. If
your application requires a different nozzle and air cap
combination, use instruction manual 307–803 or con-
sult your authorized Graco distributor or Graco Techni-
cal Assistance (see back page) to select the appropri-
ate fluid nozzle and air cap.
Be sure all the debris, including flammable
Be sure to check the manifold exhaust tubes