Ransburg RMA Indirect A11600 - Manual (Page 38)

BEARING AIR
ADJUSTMENT
The nominal bearing air pressure is 90 psi (620.5
kPa), measured at the rear of the atomizer. Mini-
mum pressure is 80 psi (551.6 kPa) and maximum
pressure is 100 psi (689.5 kPa). The turbine
should never be operated with less than 80 psi
(551.6 kPa) bearing air pressure.
Bearing air must be present when turning the
turbine on. 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. If connected, brake air
can be used to slow the turbine.
The RMA-303 is equipped with a bearing air
return line to monitor bearing air pressure at the
turbine manifold. When connected to the remote
Serial Atomizer speed controller, operation of the
turbine will automatically be shut down whenever
the bearing air pressure falls below the dip switch
setting of 80 psi (551.6 kPa).
SHAPING AIR #1 (SAI)
(Pattern Control Air)
A12089-08 Shaping Air Kit (Mono
Flex Air) 65mm Bell Cups Only
As the name implies, the shaping air is supplied
so that it is counter to the rotation of the bell cup.
This combination will provide a pattern size from
10" - 24" (250mm - 610mm) depending on air flow,
fluid flow, and cup rotation speed. Connection is
made using the "blue" 8mm tube labeled "SAI" on
the tubing bundle. The other 8mm tube labeled
"SAO" is "gray" in color and typically plugged.
However, if additional air is required, this "SAO"
tube can be connected to a secondary controlled
air source. Precautions must be taken that one
does not have a significantly higher pressure than
the other to avoid any back flow. This shaping
air combination can be used with any 65mm bell
cup. (See "Pressure and Flow Data Charts" in
the "Introduction" section.)
Figure 7: A12089-08 Shaping Air Kit
(Mono Flex Air)
>
DO NOT exceed the maximum rated
operating speed and turbine inlet pressure.
Excessive speed may cause air turbine
damage or damage to the bell.
> Bearing air
MUST be ON and supplied at
a minimum of 80 psig (551.6 kPa) whenever
the turbine is operated. If not, severe bear-
ing damage will occur. It is recommended
that bearing air be left turned on at all times,
except during maintenance or disassembly.
> Bearing damage (and subsequent turbine
failure) caused by running the turbine without
bearing air WILL NOT be covered under the
Ransburg warranty.
C A U T I O N !
W A R N I N G !
NOTE
> A minimum of 70 slpm (2.6 SCFM) should
always be kept flowing in the shaping air
passage to keep the face of the applicator
clean during manual cleaning breaks.
RMA-303 Indirect Charge - Operation
Ransburg
34 LN-9252-06.4