Interlocks – Ransburg Aerobell M Rotary Atomizer 78101 User Manual

Page 17

LN-9237-00.1

INTERLOCKS

The following system interlocks are required to
prevent equipment damage:

Bearing air should remain on at all times
and should be shut off only by turning off
the main air to the pneumatic control
cabinet.

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 opera-
tor waits at least three minutes, after
shutting off the turbine air, before shutting
off the main air supply.

The bell assembly must be removed

when making flow checks. If the paint is
turned on when the bell is mounted on the
motor shaft and not rotating, paint will
enter the shaft and possibly damage the
air bearing. Normally pneumatic inter-
locks will not allow the paint to trigger on
when the turbine air is off.

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 exceeding the maximum rated
intermittent speed of 55,000 rpm for
30mm and 57mm bell cups and 40,000
rpm for 70mm bell cups. (See "Specifica-
tions" in the "Introduction" section.)

It should not be possible for the coating
material to be sprayed unless the turbine
is spinning.

Aerobell M Rotary Atomizer - Installation

C A U T I O N

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W A R N I N G

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Two interconnected bearing air ports are
provided, 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 60 psi
at the atomizer, the turbine air should be
automatically interlocked to shut off.

High voltage must be interlocked with
the solvent valve pilot signal to prevent
solvent flow while high voltage is ener-
gized.

Turbine air and brake air must be inter-
locked to prevent both from being used
simultaneously.