Lorentz PS2-150 Series Manual For Installation And Operation page 34

32 Pump Installation
8 Pump Installation
8.1 General Instructions
WARNING – All electrical connections
must be performed by qualified experts
only.
WARNING – Before starting any work on
the pump/motor, make sure that the
electricity supply has been switched off
and that it cannot be accidentally
switched on!
CAUTION – Before you start the assembly,
make sure that all parts were delivered
and have not been damaged during
transport.
8.1.1 Pipe Sizing
LORENTZ pump systems are extremely efficient. It is impor-
tant to keep this efficiency throughout the entire system.
A main reason for loss of efficiency 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.
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 prefilled 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.