Lorentz PS2-150 Series Manual For Installation And Operation page 48

46 Pump Installation
Operating noise – Make sure, by applying appropriate
measures, that the local environment will not be impaired by
pump operating noise.
Table 7: Operating noise
Pump system
PS2-600 CS-17-1
PS2-1800 CS-37-1
Space – During installation, make sure that there is enough
space available to permit subsequent disassembly of the
motor unit in the direction of the motor fan (minimum 120
mm / 4.7") and of the strainer basket above (minimum 140
mm / 5.5").
When installing in very small spaces the natural cooling may
be insufficient and additional ventilation may be required.
Carefully consider the ventilation in order not to exceed the
maximum ambient temperature.
Figure 17: Prevent air locks in pipes
Max. noise level
65 db
68 db
8.5.2 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 allowed for pipe pressure losses
during the sizing process of your system.
CAUTION – Consult COMPASS or a pipe
pressure sizing chart to determine the
correct pipe size. Oversize the pipe line to
reduce the pressure drop.
CAUTION – The length of the inlet and of
the outlet pipeline must be taken into
consideration when calculating pressure
losses.
CAUTION – Air locks must be avoided at
the inlet pipeline. Avoid sharp 90° elbows
and sharp pipe size adaptors.
Figure 18: Avoid 90° elbows and size adaptors