ProMinent Sigma 3 Basic Operating Instructions Manual page 19

WARNING!
ATEX pumps in areas at risk from explosion
If feed chemicals are metered, which tend to produce
exothermic reactions or self-ignite (examples of exo‐
thermic reactions: pyrophoric substances with air, alkali
metal with water, decomposition of organic peroxides,
polymerisation reactions), they can lead to high tempera‐
tures and ignition.
– Put in place measures in accordance with EN
80079-38.
WARNING!
ATEX pumps in areas at risk from explosion
If abrasive media is being metered, it will escape as
soon as all layers of the diaphragm have eroded
through.
– Wire the electrical diaphragm rupture indicator to
stop the pump in the event of a diaphragm rupture.
WARNING!
ATEX pumps in areas at risk from explosion
– Electrically wire all electrical units cleanly and per‐
manently to an electrically clean earthing point, -
e.g. with an earthing bar on your system.
– Electrically connect the electrical units fitted with a
potential equalisation cable to each other, cleanly
and permanently, to an electrically clean potential
equalisation point - e.g. with a potential equalisation
bar on your system.
– Note the enclosed documentation for the individual
electrical components.
WARNING!
ATEX pumps in areas at risk from explosion
– Use a suitable motor protection switch to protect
power end motors. Use motor protection approved
for this application with Ex"e" motors. (Protection
against warming caused by overloading)
– Provide a time-delay residual current device.
– Observe the enclosed operating instructions for the
Ex motor.
WARNING!
The following applies in areas at risk from explosion:
– Note the details of the type examination certificate
PTB 00 ATEX 2048 X for the Namur sensor
NJ1.5-8GM-N as well.
Safety chapter
19