8.3 Submersible Pumps
For submersible pumps only: The ECDRIVES are water
lubricated and therefore prefilled with water. If the motor is
stored for more than three months, the water will have been
pressed out; the rotor must be turned by hand before use to
ensure that the rotor is not stuck.
8.3.1 Wiring the Pump
CAUTION – No disconnect switches
must be installed between the motor and
the pump controller. Connecting the
motor wire to the active controller might
irreparably damage it. Such damage is
excluded from the warranty.
CAUTION – If the pump wires are in the
wrong order, the motor will run in reverse
and the pump will not function correctly.
Damage may result. Check the direction
before installing the pump. The proper
direction is counter-clockwise when
viewed from above.
CAUTION – Never let the pump run dry.
Dry running will damage the pump and
void the warranty. LORENTZ requires dry
run protection for every submersible
pump system.
The motor cables of the pump have a marking to allow
correct wiring. Connect the wires using this sequence:
1: Motor cable L1
2: Motor cable L2
3: Motor cable L3
: Ground connector
The submersible pump must be submerged in water before
checking the correct rotational direction. The correct rotation
direction for submersible pumps is counter-clockwise,
viewed from the top. It is also labelled with an arrow on the
pump end.
The testing process for rotational direction depends on
the pump type. Please refer to the next page for detailed
instructions on testing helical rotor (HR) and centrifugal
submersible pumps. To determine which type of pump you
have, please refer to “3.4 Naming” on page 8.
Figure 9: Exemplary LORENTZ submersible pumps
34 Pump Installation
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