Ransburg Aerobell 168 A12787 - Manual (Page 35)

Aerobell 168 - Installation
LN-9270-12.3 32
INSTALLATION (continued)
N O T E
! W A R N I N G
Arcing/fire hazard exist if ungrounded metal
connections (air or fluid) are used in the spray
area. Use plastic non-conductive connec-
tions, or ensure metal connections are at
ground potential.
Do not use PTFE tape or pipe dope on any
air beyond the final air filter for BEARING
AIR. The tape or dope may break free and
cause plugging of the turbine air bearings,
and result in turbine failure. See pages 23 &
24 for tubing connections and sizes.)
Bearing Air
Use tubing (clear, see-through, nylon, natu-
ral) to connect a properly filtered air source
to the bearing air fitting on the manifold. It
is recommended to use tubing (clear, see-
through) for bearing air so that any contam-
ination that gets past the final bearing air
filter will be apparent. Also refer to the pre-
vious "Warning".
Under the “Operation” section which follows,
there is a "Caution" regarding bearing dam-
age if the turbine is run while bearing air is
off. Since the turbine must not be operated
without first turning on bearing air, it is re-
quired to provide some means of assuring
the presence of bearing air before turning
the turbine “On.” One method is by inter-
locking the turbine drive air to the bearing
air (i.e., with an air piloted valve).
Provisions should also be made to assure
bearing air remains on during the coast down
period when turbine air is turned off. See
“Specifications” in the “Introduction” section of
this manual
Brake Air
Brake air is used to slow the turbine when
changing speed. It is recommended that the
brake air turbine drive air be interlocked.
Turbine Air
Turbine drive air must be interlocked with paint
flow. Damage to spindle will occur if paint is
triggered without the bell cup spinning. It is
recommended that the bell cup is spinning at
least 10,000 rpm before any fluid is turned on.
FLUID CONNECTIONS
See the following "Note".
N O T E
If the coating material used is heated, check
the maximum rated temperature for the fluid
tubing used. Polyethylene tubing (H-2338 and
H-2339) is rated for a maximum of 80F (27
0
C).
Nylon tubing (H-2340 and H-2341) is rated for
200F (95
0
C)maximum>
! C A U T I O N