ProMinent Sigma 3 Basic Operating Instructions Manual page 18

Safety chapter
Ignition hazard
Ignition hazard with bought-in actuator or control drive
components
Ignition hazard caused by bought-in proximity switch
NJ1.5-8GM-N (stroke sensor)
Safety information
18
Protective measures to be observed by the customer
Refer to the documentation for the actuator.
Wait 3 minutes after switching off before opening the
housing.
Refer to the documentation for the proximity switch (elec‐
trical installation, maintenance, ...).
WARNING!
ATEX pumps in areas at risk from explosion
– The operator must observe the Operator Directive
when operating equipment in areas at risk of explo‐
sion.
– Only clean plastic parts carefully with a damp cloth
to avoid electrostatic charges and sparks.
WARNING!
Motor may overheat
If the necessary cooling air supply is not guaranteed, the
motor may overheat. In an area at risk from explosion, it
could trigger an explosion.
– Maintain sufficient clearance between the air intake
opening and the walls. The distance should be
greater than 1/4 of the diameter of the air intake
opening.
– The fan must not suck in the exhaust air from other
devices.
WARNING!
ATEX pumps in areas at risk from explosion
– Metering pumps must have an appropriate safety
relief valve on the discharge side (to protect against
excessive heating due to overloading or impact
sparks caused by the breakage of power end parts).
WARNING!
ATEX pumps in areas at risk from explosion
– A flow control is needed to stop the pump as soon
as no flow is detected.
WARNING!
ATEX pumps and flammable media
Only with material versions PP_, PV_ and PC_: The igni‐
tion temperature is reduced significantly below the igni‐
tion temperature at atmospheric pressure due to com‐
pression with the discharge stroke of the possibly
ignitable vapour-air mixture.
– Do not allow it to run dry. Take appropriate protec‐
tive measures.
– Immediately switch off the pump in the event of a
diaphragm rupture.