Ransburg Aerobell 168 A12787 - Manual (Page 43)

Aerobell 168 - Operation
LN-9270-12.3 40
BEARING AIR
Air bearing air must be on whenever the tur-
bine is operated. If not, severe bearing dam-
age will occur. It is recommended to leave
bearing air on at all times. During mainte-
nance or disassembly, turbine air musts be off
for a least 3 minutes before shutting off air or
main line air.
Bearing damage (and subsequent turbine
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 spin-
ning. Brake air can be used to slow the tur-
bine (see “Brake Air” in this section). Wait for
the turbine to stop spinning before turning
bearing air off.
Operating the turbine with bearing air pres-
sure 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) min-
imum, 100 psi (7 bar) maximum. Under no
circumstances should the turbine be operated
with less than 80 psi bearing air pressure.
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 tur-
bine. 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 im-
possible for air to be applied to the braking sys-
tem while the turbine air is on.
! W A R N I N G
Electrical discharge of a high electrical ca-
pacitance fluid/paint system can cause fire or
explosion with some materials. If arcing occurs
when a specific coating material is used, turn
the system off an verify that the fluid is non-
flammable. In these conditions, the system is
capable of releasing sufficient electrical and
thermal energy to cause ignition of specific
hazardous materials in the air.
ELECTROSTATIC
VOLTAGE
Depending upon the power supply model
used, the maximum output voltage of the pow-
er 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), pene-
tration into cavity areas, and target distance.
! C A U T I O N