Hydraulic Connections - FLOWTECH flowboost K.H Operation And Maintenance Manual

Three-phase versions
Power the electric pump via a cut-off device, in accordance with the installation requirements. Three-phase
appliances must be protected against short-circuits and overloads by a class 10 protection device, in
accordance with IEC 60947-4. Set the rated current according to the value shown on the rating plate. Use a
manual reset device.
Check which configuration of the electrical connections corresponds to the available mains voltage on the
rating plate and on the markings on the motor. If required, change the configuration by moving the jumpers to
the appropriate terminals. At the end of the operation, check that the electrical connections are secure and
stable.
The direction of rotation must be checked by observing the motor on the cooling fan side. Do not remove the
protection devices to check the direction of rotation. While checking the direction of rotation, run the motor
for as short a time as possible. If the direction of rotation cannot be visually checked, it is possible to check it
indirectly by installing the pump in the system and running it at maximum flow rate (valves completely open,
free delivery), according to one of the two following modes:
During operation, measure the maximum power consumption with an ammeter clamp. If the direction of
rotation is incorrect, the values will be nearly double those specified on the rating plate.
Alternatively, run the machine for a few seconds, then reverse the direction of rotation and repeat the
operation. The correct direction is the one in which the greatest flow rate is obtained.
To reverse the direction of rotation, it is sufficient to swap two phases between them.
Variable frequency drive (VFD) applications
For variable frequency installations (power supply via "inverter"), make sure the frequency inverter can supply
the rated voltage and at least 10% more current than the rated value shown on the rating plate. To install and
connect the device, please refer to the manufacturer's instruction manual.

Hydraulic connections

Before starting any work on the electric pump or the motor, make sure that the power supply is disconnected
and it cannot be accidentally restored.
Installing the electric pump can be complex and dangerous for people. This operation must, therefore, be
performed by competent, qualified installers.
Comply with the current accident-prevention regulations, use suitable protective equipment and refer to the
standards, legislation and local and/or national codes of the country of installation for the connection to water
and electrical mains.
The following indications regarding the verification of the NPSH and the maximum pressure must be
complied with to ensure the pump operates correctly and to prevent damage to people or things.
Pipes and system
Comply with the current accident-prevention regulations, use suitable protective equipment and refer to the
standards, legislation and local and/or national codes of the country of installation for the connection to water
and electrical mains.
The pump liquid inlet is frontal (axial) and the outlet is radial: make sure that the pump is correctly connected
to the pipes.
The hydraulic pipes must be suitable to the work pressure and nature of the liquid pumped. The pipes must
be adequately supported, must not weigh on the unit. Do not force the pipe's positioning when fixing with the
pump. Flexible pipes or compensation joints are required to prevent the transmission of vibrations from the
pump to the pipes and vice-versa.
Provide an inclination not less than 2% to prevent air pockets in the suction pipe.
flowboost
K.H Pump Manual
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