3. Pump controller
This pump controller works as pressure controller fully automatically, depending on demand.
The speed of the pump (s) is infinitely variable with frequency converter operation. The actual value in the system is
determined by means of a sensor. A PI controller adjusts the actual value to the setpoint. When operating with contactor
or soft starter, the pump (s) are switched on and off as required. The pump controller can be parameterized and must be
adapted to the respective operating conditions. The parameters are displayed in plain text.
Commissioning is menu-driven. During commissioning, some data must be entered to ensure smooth operation of the
system. It should be done by a knowledgeable person.
Advantages of pump control
-almost constant control value
-Continuous adjustment of pump performance to changing operating conditions
-Energy saving in frequency converter operation
-no integrated memory required for frequency converter operation
-less mechanical wear of the pumps
Design of the pump regulation
-the pump (s) must be designed according to the plant / requirement
-the integrating memory must be properly sized and set correctly.
-The pump (s) must have hydraulic capacity (s) of 10 - 20% in order to be able to control.
-For submersible pumps, the minimum frequency must be limited to 30..35Hz
(Hydrodynamic bearing) (See information from the manufacturer of the engine.
-For underwater pumps a power reduction of approx. 5..10% can be assumed
Use of GSM monitoring
If you have installed a GSM modem (terminal), you can monitor the pump controller.
Depending on the technical design, different commands are available to you.
Make sure the antenna is well aligned for proper wireless network connection.
Make sure that the power supply is always active together with the pump regulator.
You need a registered SIM card. There are 3 users allowed as phonebook entry.
Use of a Modbus data transfer
If you have installed the Modus interface, you can monitor the pump controller or query data in the registers. Depending
on the technical design, different data is available to you. You can reset the controller via the Modbus interface. There is
no remote adjustment. Make sure that the power supply is always active together with the pump controller.
Installation and assembly of the controllers
Environmental influences such as high temperatures, high humidity are to be avoided as well as dust,
Dirt and aggressive gases. The installation site should be a well-ventilated place not exposed to direct sunlight.
Due to the heat convection, the frequency converter controller must have at least
Cm15 cm away from side walls or other facilities.
The permissible temperature range of + 5 ° C to + 30 ° C must not be fallen below or exceeded.
Do not install the frequency converter controller near heat radiating equipment
Assembly of the pump control
Depending on the design of the control, a metal wall cupboard or a metal cupboard is built.
The wall cabinet has 4 holes for wall mounting the control cabinet.
For sole mounting stud bolts are recommended on which the control cabinet is hung.
Mounting dimensions: See manufacturer data sheet ... .
The cupboard is delivered and set up with 200mm base.
Pay attention to a secure position and ensure good ventilation on site.
Mounting dimensions: See manufacturer data sheet ... .
Construction of a control system with integrated storage tank (expansion tank)
A back flow preventer with spring force is absolutely necessary and can be installed in the suction line in front of the
pump or in the pressure line behind the pump! If the check valve is installed in the suction line, an expansion vessel must
be installed on the pressure side. Otherwise, an expansion tank can be installed if necessary.
the system is operated with an expansion vessel, the expansion vessel must be pre-pressed in the unpressurised state. The
prepress pressure must be checked regularly.
