Alfa Laval S 821 - Cover Interlocking Switch and Fluid Connections

8.4 INTERFACE DESCRIPTION 8 TECHNICAL REFERENCE
158
760 Cover interlocking switch (optional)
The separator is equipped with a interlocking
switch to detect if the cover is mounted.
Signal processing in STAND STILL:
• The circuit is closed when the cover of the
separator is mounted.
• The interlocking switch should be connected
in such a way that starting of the motor is
prevented when the separator cover is not
mounted.
Signal processing in STARTING, RUNNING
and CLEANING:
• If the circuit is broken the separator should
be stopped automatically by NORMAL
STOP. This is to minimise the risk of having
access to moving parts.
Fluid connections
Complementary information is given in the
document Connection List.
201 Inlet
Processing in STAND STILL:
• Shall be closed.
Processing in STARTING:
• Should be closed. Bowl will be open and
empty or closed and filled depending on if
start is done from STAND STILL or
STOPPING.
Processing in RUNNING:
• Could be closed or open.
Processing in CLEANING:
• A sequence of cleaning liquids should be
fed to the separator. The flow rate should be
as high as possible and preferably not less
than the production flow rate.
Processing in NORMAL STOP or
EMERGENCY STOP: