Ransburg Aerobell 168 A12787 - Manual (Page 49)

Aerobell 168 - Maintenance
LN-9270-12.3 46
MAINTENANCE (continued)
! W A R N I N G
The high voltage must be turned OFF before
entering the spray area and performing any
maintenance procedures. Spray booth ex-
haust fan(s) should remain ON while cleaning
the equipment with solvents.
Internal Fluid Path Purge
Cleaning and Load
Cleaning the incoming paint line (from paint
supply source such as color manifold through
the fluid manifold and bell assembly:
Open the dump valve and flush the incoming
paint line with solvent or an air/solvent chop.
Make sure the last step of the sequence is air
to purge the dump line of remaining solvent.
To speed the loading of the new paint, leave
the dump line open to allow the air in front of
the paint push to escape. The length of time
the dump valve is open depends on several
factors such as viscosity, paint pressure, etc.
Timing should be such that the dump is closed
as the paint reaches the trigger valve in the
atomizer. Paint in the dump line may cause
high voltage issues.
External Atomizer Surface Clean-
ing
Verify that the high voltage is turned off.
All external surfaces may be cleaned using a
mild solvent and lint free rags to hand wipe.
Turbine drive air must be off, but leave bearing
air on. The shaping air should have approxi-
mately 70 SLPM air flow through each to pre-
vent the solvent from entering these passag-
es.
Do not spray the unit with a solvent applica-
tor used for cleaning. The cleaning fluid under
pressure may aid conductive materials to work
into hard to clean areas or may allow fluids to
be forced into the turbine assembly.
Do not reuse an atomizer bell cup that
shows any sign of damage such as nicks,
heavy scratches, dents, or excessive wear.
Always final wipe all parts with a non-polar
solvent and wipe dry (high flash Naphtha,
etc.).
Bell Cup Cleaning
(Cup Wash) (Without Cleaning the
Incoming Paint Line)
Turn off the high voltage and trigger valve.
With the bell spinning at 30,000 rpm, turn on
the external solvent valve to allow cleaning
solvent to flow through the manifold passages,
through the fluid tube, and into the bell cup.
The spinning bell will atomize the solvent,
clean out the bell passages. It is always rec-
ommended to blow the solvent line dry after
the cleaning operation. Typical bell speed dur-
ing the cup flush sequence is 30,000 rpm.
! W A R N I N G
Never wrap the applicator in plastic to keep
it clean. A surface charge may build up on the
plastic and discharge to the nearest ground
object. Efficiency of the applicator will also be
reduced and damage of failure of the applica-
tor components may occur. WRAPING THE
APPLIACTOR IN PLASTIC WILL VOID
WARRANTY.