Ransburg RMA Direct A12867 - Manual (Page 47)

RMA-303 Direct Charge - Installation
LN-9266-11.3 44
INTERLOCKS
! C A U T I O N
•
When the turbine air is turned off, the turbine
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. Nor-
mally pneumatic interlocks will not allow the
paint to trigger on when the turbine air is off.
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 Atomiz-
er Module. (See current “Serial Atomizer”
service manual.)
•
High voltage must be interlocked with the
solvent valve pilot signal to prevent sol-
vent flow while high voltage is energized
(direct charge only).
•
Turbine air and brake air must be inter-
locked to prevent both from being used
simultaneously. This interlock is provided
by the Serial Atomizer Module. (See cur-
rent “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:
!
W A R N I N G
•
The high voltage 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 ex-
ceeding the maximum rated speed of 70,000
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.