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Connect the overflow pipe:
do not lead the overflow pipe back to the suction pipeline! (This is only permitted
o
under special circumstances, and requires temperature monitoring.)
this can negatively affect the operation of the pump if the pump is run
without water being consumed from the pressurised side: the water
temperature can rapidly rise and exceed the permitted 40°C. This can lead to
a considerable reduction in operating lifetime, or irreparable damage.
use flexible pipes at the connection;
o
this prevents vibrations breaking pipelines.
it is advisable to collect any water discharged by the overpressure protection;
o
this means the activation of the overflow valve can be monitored.
4.3 Electrical
The electric connection of the drive of the HD pump must be carried out by an authorised person. Pay
attention to the correct rotation direction of the rotor shaft. Follow these steps:
Connect the earth:
Follow the instructions in the Attachment;
o
Connect the power supply:
Follow the instructions in the Attachment;
o
Connect the electric inlet pressure switch (optional):
Follow the instructions in the Attachment;
o
Use a motor protection switch with current setting to prevent damage to the electric motor:
Unless this current setting is already integrated in a soft starter, inverter or similar;
o
Check whether the current setting is set correctly (see Attachment);
o
Use an isolation switch:
This allows the machine to be disconnected from the power supply for maintenance or
o
repairs;
Where necessary, use short-circuit protection;
If necessary, install an emergency stop button.
If the electric motor is supplied by a frequency inverter, respect the following points:
Minimum and maximum speed;
Maximum rated current.
IBAN NL71 RABO 0340341610 · KvK Den Haag 27230471 · Btw-nummer NL8000.78.378.B01 · info@vanderendegroep.nl · www.vanderendegroep.nl
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