Ransburg RMA Indirect A12869 - Manual (Page 46)

RMA-303 Indirect Charge - Operation
41 LN-9268-11.4
N O T E
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W A R N I N G
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W A R N I N G
TURBINE SPEED
Turbine speed is determined by the input air
pressure/flow at the rear of the atomizer.
Turbine speed is intended to be closed loop
controlled using the fiber optic speed transmit-
ter, located on the turbine manifold. A speed
input to a remote speed controller, such as the
Serial Atomizer module, is required. (See
"Speed and Pressure" charts in the
"Introduction" section.)
> The bell rotational speed determines the
quality of atomization and can be varied for
various paint flow rates and paint formulations.
For optimum transfer efficiency and spray pat-
tern control, the bell rotational speed should
be set at the minimum required to achieve
proper atomization. Excessive speed reduc-
es transfer efficiency!
> DO NOT exceed the maximum rated oper-
ating speed and turbine inlet pressure. Ex-
cessive speed may cause air turbine damage
or damage to the bell.
BEARING AIR ADJUSTMENT
The nominal bearing air pressure is 90 psi
(620.5 kPa), measured at the rear of the at-
omizer. Minimum pressure is 80 psi (551.6
kPa) and the maximum pressure is 100 psi
(689.5 kPa). The turbine should never be op-
erated with less than 80 psi (551.6 kPa) bear-
ing pressure.
Bearing air mist be present when turning the
turbine on. Bearing air must remain on when
the turbine air is tuned off until the turbine
stops spinning. Never turn off bearing air to
cause the turbine to stop spinning. If connect-
ed, brake air can be used to slow the turbine.
> Bearing air MUST be ON and supplied at a
minimum of 80 psig (551.6 kPa) whenever the
turbine is operated. If not, severe bearing
damage will occur. It is recommended that
bearing air be left on at all tines, except during
maintenance of disassembly.
> Bearing damage (and subsequent turbine
failure) caused by running the turbine without
bearing air WILL NOT be covered under the
Ransburg warranty.
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 , oper-
ation of the turbine will automatically shut
down whenever the bearing air pressure falls
below the dip switch setting of 80 psi (551.6
kPa).