Ransburg RMA-560 Single_Dual Purge Direct A13364 - Manual (Page 36)

INTERLOCKS
The following system interlocks are required to
prevent equipment damage.
• Bearing air should remain on at all times
and should be shut-off by turning off the
main air to the pneumatic control cabinet.
• It should not be possible for the coating
material to be sprayed unless the turbine is
spinning.
•
Two inter-connected bearing air ports are
provided, one for supply air and the other
to be used as a return signal for measur-
ing 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” ser-
vice manual.)
• High voltage must be interlocked with the
solvent valve pilot signal to prevent solvent
flow while high voltage is energized (direct
charge only).
• Turbine air and brake air must be inter-
locked to prevent both from being used si-
multaneously. This interlock is provided by
the Serial Atomizer Module. (See current
“Serial Atomizer” service manual.)
• Any other interlocks required by local na-
tional code or international code. The fol-
lowing system interlocks are required to
prevent equipment damage:
C A U T I O N !
W A R N I N G
!
† The high voltage and/or coating materi-
al 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 80,000 rpm. (See “Specifications” 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 (direct
charge only).
† Never spray solvent with high voltage on.
† 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. Mate-
rial 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.
RMA-560 Single/Dual Purge Direct Charge - Installation
Ransburg
LN-9278-13 33