Ransburg RMA Dual Purge Direct A12300 - Manual (Page 45)

RMA-303 Dual Purge/Direct Charge - Installation
40
INTERLOCKS
The following system interlocks are required to
prevent equipment damage:
1. Bearing air should remain on at all times and
should be shut off only by turning off the mainair
to the pneumatic control cabinet.
C A U T I O N
!
† Bell cup must be rotating at least 20,000
rpm when fluid is triggered. Turning on fluid
without the bell cup spinning may flood the
turbine and cause damage to components.
C A U T I O N
!
† When the turbine air is turned off, the tur-
bine will continue to operate or "coast down"
for about two minutes. Provisions should be
made to assure that the operator waits at least
three minutes, after shutting off the turbine air
and before shutting off the main air supply.
† The bell cup must be removed when
making flow checks. If the paint is turned on
when the bell is mounted and the turbine shaft
is not rotating, paint will enter the shaft and
possibly damage the air bearing. Material
flow checks (flow rate verification) must be
made with the bell cup off and the turbine
not rotating. Normally pneumatic interlocks
will not allow the paint to trigger on when the
turbine air is off. These interlocks may need
to be bypassed with proper safety procedures
as required.
2. It should not be possible for the coating ma-
terial to be sprayed unless the turbine is spin-
ning.
3. Two interconnected bearing air ports are provid-
ed, one for supply air and the other to be used
as a return signal for measuring bearing air
pressure at the atomizer. If bearing air falls
below 80 psi (551.6 kPa) at the atomizer, the
turbine air should be automatically interlocked
to shut off. This interlock is provided by the
Serial Atomizer Module (see current "Serial
Atomizer" manual).
4. High voltage must be interlocked with the
solvent valve pilot signal to prevent solvent flow
while high voltage is energized.
Ransburg
LN-9263-08.5
† Never spray solvent with high voltage on.
W A R N I N G
!
† Under normal operation, the high volt-
age and/or coating material must never be
turned on unless the bell cup is mounted on
the motor shaft and the turbine is rotating.
† Pneumatic input to the turbine air
inlet must be controlled to prevent the
turbine from exceeding the maximum
rated speed of 70,000 rpm. (See "Spec-
ifications" in the "Introduction" section.)
† High voltage must never be turned on
while cleaning solvent is being sprayed either
through the applicator supply or the cup wash
line. High voltage and both solvent triggers
must be interlocked.
W A R N I N G
!
5. Turbine air and brake air must be interlocked
to
prevent both from being used simultaneously.
This interlock is provided by the Serial Atomizer
Module (see current "Serial Atomizer"manual).
6. Any other interlocks required by local code,
national code, or international code.
7. High voltage must be interlocked with the
booth entry door.