ProMinent Sigma 3 Basic Operating Instructions Manual page 20

Safety chapter
Potential equalisation line (prescribed in
the area at risk from explosion)
20
WARNING!
ATEX pumps in areas at risk from explosion
– Make sure that a suitably competent person checks
whether the appropriate installation information from
the "Installation" chapter has been implemented cor‐
rectly.
– Make sure that a "recognised competent person"
checks the electrical installation and in particular the
intrinsically safe power circuits.
– Set the opening pressure of the relief valve to a
maximum of no more than 1.5 times the nominal
pressure of the pump.
WARNING!
ATEX pumps in areas at risk from explosion
– Carry out a general check to ensure that the system
is working properly, particularly the power end and
bearings, by regularly monitoring it (for leaks,
noises, temperatures, smell, etc.).
– Do not allow the pump to run hot due to a lack of oil.
With lubricated metering pumps, regularly check for
the presence of lubricant, for example by checking
the liquid level, visual leak control etc. If oil is
leaking, examine the leakage point immediately and
eliminate the cause.
– Check the correct operation of the relief valve down‐
stream of the pump. In premises at risk from explo‐
sion, the relief valve should prevent the gear from
becoming overloaded and becoming hot.
– Observe the enclosed operating instructions for the
Ex motor.
– Only use a moist cloth when cleaning plastic parts.
– Prevent serious deposits of dust on the motor.
– Consider potential equalisation before you approach
any pump equipment that could be at a different
electrical potential (such as pipes or tools).
– Replace wear parts, such as bearings, when there is
an identifiable incidence of unacceptable wear.
– Appropriate diagnostic equipment for bearing
damage is recommended for the premature detec‐
tion of bearing damage.
– Check whether the potential equalisation lines are
all sitting correctly with clean contacts. Use the equi‐
potential bonding drawings as an aid – see
Appendix.
– Check whether the earth lines are all sitting correctly
with clean contacts. Use the equipotential bonding
drawings as an aid – see Appendix.
– Only use genuine spare parts as replacements.
The entire installation supplied is provided ex works with the necessary
potential equalisation lines.
Electrically wire an additional potential equalisation cable from the poten‐
tial equalisation cables from this system cleanly and permanently to an
electrically clean potential equalisation point, e.g. to a potential equalisa‐
tion bar on site.
Potential equalisation of frame
An earthing point for the customer is fitted on the frame.