Lorentz PS Série Manuel D'installation Et De Fonctionnement page 41

HR Pumps:
The HR pumps are positive displacement pumps and
hence will only deliver flow rate when running with correct
rotation direction. They will be damaged when running in
reverse.
A new pump "out-of-the-box" is shipped from the factory
with a lubrication film on the rotor which allows a test run
of max. 5 seconds in total without submerging the pump.
Once the pump came in contact with water it must not be
operated without being completely submerged! Submerging
only the inlet is not sufficient and will result in damage to
the pump end.
Check the rotational direction as follows:
(1) Connect the pump to the controller and power supply.
(2) Observe the information regarding HR pump testing
above and follow them strictly!
(3) Start the pump and check the rotation direction by
observing the motor shaft at the pump inlet.
(4) Compare to the indicated rotation direction on the
pump end.
(5) In case the direction is wrong, switch off immediately
and change two of the three phase leads (e.g. red and
yellow).
(6) Start the pump again and check the rotation direction.
Do not exceed 5 seconds of combined testing time.
(7) The pump will only deliver water flow when running
with correct rotation direction.
Pump Installation
Centrifugal Pumps:
Check the rotational direction as follows:
(1) Connect the pump to the controller and power supply.
(2) Start the pump and check the delivered flow rate.
(3) Stop the pump, disconnect the power supply and
change two of the three phase leads (e.g. red and
yellow).
(4) Start the pump again and check the delivered flow.
(5) Stop the pump, disconnect the power supply and com-
pare the flow rates from point 2 and 4. The wiring with
the better flow rate has the right rotational direction.
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