Pump Installation 4948 Controller Installation
EN EN
8.1.1 Pipe sizing
LORENTZ pump systems are extremely ecient. It
is important to keep this eciency throughout the
entire system. A main reason for loss of eciency
is pipe pressure losses. Make sure that you have
included the pipe pressure losses during the sizing
process of your system.
Consider a smart pipeline design from the beginning.
If possible use high-quality HDPE-pipes. If you are
not sure about the strength of your pipes contact the
pipe manufacturer.
a
CAUTION – Consult COMPASS or a
pipe pressure sizing chart to determine
the correct size. Oversize the pipe line to
reduce the pressure drop.
CAUTION – The length of the inlet and
of the outlet pipeline must be considered
for the calculation of the pressure losses.
CAUTION – Only run the pump when
it is completely prelled with water
(surface pumps), submersible pumps
must be completely submerged. This
means there must be no air in the pipes.
CAUTION – For surface pumps, air
locks must be avoided at the inlet pipe
line. Avoid sharp 90° elbows and sharp
pipe size adaptors (see also "Figure 17:
Prevent air locks in pipes" on page 50
and "Figure 18: Avoid sharp 90° elbows
and size adaptors" on page 50).
CAUTION – When you use plastic
pipes you must use a safety rope.
8 Pump Installation
8.1 General instructions
l
WARNING – All electrical connections
must be performed by qualied experts
only.
WARNING – Before starting any work
on the pump/motor, make sure that
the electricity supply has been switched
o and that it cannot be accidentally
switched on!
a
CAUTION – Before you start the
assembly, make sure that all parts were
delivered and have not been damaged
during transport.
For surface pumps:
l
WARNING – PSk CS pumps must NOT
be submerged in water or subjected to
rain or dripping water.
WARNING – If the pump is installed
in a humid area, eective ventilation and
aeration must be provided in order to
prevent condensation.
WARNING – When installing in very
small installation spaces the natural
cooling may be insucient. Carefully
consider the ventilation in order not to
exceed the maximum environmental
temperature.
WARNING – The pump might heat
up in operation. The pump must not be
installed on combustible surfaces. Strong
incombustible surfaces should be used
e.g. concrete or stone surfaces.
Figure 15: Grounding cable mounting at controller housing
Figure 16: Grounding cable mounting at grounding prole rod
washer
cable
t
ooth washer
washer
nut
bolt for
ground connection
at controller housing
nut
washer
tooth washer
cable
cable washer
bolt
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