Ransburg Aerobell 168 Atex Approved 13350 - Manual (Page 40)

BEARING AIR BRAKE AIR
Brake air is used to slow the turbine speed. It is
advantageous for short color change cycle times,
and may be used for stopping the turbine. Use of
the brake involves (1) turning off turbine drive air,
and then (2) turning the brake air on for a short
duration.
Brake air should be interlocked so that it is impos-
sible for air to be applied to the braking system
while the turbine air is on.
ELECTROSTATIC
VOLTAGE
Depending upon the power supply model used,
the maximum output voltage of the power supply
can vary. The actual voltage setting will depend
upon various coating application requirements.
The level of voltage applied to the Aerobell 168
plays an important role with regard to pattern size,
efficiency (wrap), penetration into cavity areas,
and target distance.
W A R N I N G
!
C A U T I O N !
† Air bearing air must be on whenever
the turbine is operated. If not, severe bear-
ing damage will occur. It is recommended
to leave bearing air on at all times. During
maintenance or disassembly, turbine air
musts be off for a least 3 minutes before
shutting off air or main line air.
† Bearing damage (and subsequent tur-
bine failure) caused by running the turbine
without bearing air will not be covered under
Ransburg warranty.
† When turning the turbine on, bearing air
must be present. Likewise, bearing air must
remain on when the turbine air is turned off
until the turbine stops spinning. Never turn
off bearing air to cause the turbine to stop
spinning. Brake air can be used to slow
the turbine (see “Brake Air” in this section).
Wait for the turbine to stop spinning before
turning bearing air off.
† Operating the turbine with bearing air
pressure below 80 psi (measured at turbine
inlet ) may cause bearing damage.
† The nominal bearing air pressure is 90
psi (6 bar) +/- 10 psi (.7 bar), 80 psi (5.5
bar) minimum, 100 psi (7 bar) maximum.
Under no circumstances should the turbine
be operated with less than 80 psi bearing
air pressure.
† Electrical discharge of a high electrical
capacitance fluid/paint system can cause
fire or explosion with some materials. If
arcing occurs when a specific coating ma-
terial is used, turn the system off an verify
that the fluid is non-flammable. In these
conditions, the system is capable of releas-
ing sufficient electrical and thermal energy
to cause ignition of specific hazardous
materials in the air.
Aerobell 168 - Operation
Ransburg
LN-9247-13 37