Features
— Number of speeds. The number of speeds provided in the design of the pump. Each speed corresponds to its performance value (see above). The options could be:
- 1 speed. There are no adjustments in such models; when turned on, the pump can operate only at one speed. This is the simplest and most inexpensive option, due to the absence of additional elements (regulators) in the design. Of course, it is convenient only in cases where the unit must operate at full capacity every time it is turned on.
- 2 speeds. 2 speeds give the user some degree of choice: the pump does not have to be turned on at full power — when it is not required, the unit can be run at reduced power to save electricity and not wear out the mechanisms beyond what is necessary.
- 3 speeds. The largest number of adjustments found in modern pumps — it makes no sense to provide a larger number for many reasons. It gives even more options for setting operation parameters than 2 speeds.
- Stepless adjustment. This option implies the ability to set the regulator to any position from minimum to maximum (in some models, fixed settings may also be provided, but only as an additional option). It provides maximum freedom and precision in the choice of operating mode. However, it significantly affects the price; and the real need for smooth adjustment occurs quite rarely.
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Automatic operating mode.... The essence of this function differs depending on the purpose of the device (see above). So, in models for increasing the pressure of cold water, the automation turns on the pump when the tap is opened and turns it off when it is closed — a special sensor reacts to the movement of water. In models for heating and domestic hot water, automation is responsible for adjusting the operating parameters — for example, when screwing the valves and reducing the flow rate, the pump can reduce the pressure, as well as, for additional functions, such as an on-off timer. Anyway, this feature makes life easier for the user, eliminating the need to perform certain operations manually and adding new features to the pump; but the specific set of these features depends on the model.
— Display. Various additional information can be displayed on the display: operating mode, performance settings, water temperature, set timers, error messages and much more. It makes management more convenient and intuitive. Pumps usually use the simplest form of black and white LCD screens, but this is quite sufficient for the purposes mentioned.
— Control panel. In this case, the control panel means a panel that has a switch with a choice of operating modes between automatic (see above) and manual. Accordingly, the presence of several modes almost necessarily means the presence of a control panel. But the speed switches themselves are not considered for this function.Max. power consumption
The electrical power consumed by the pump during normal operation and maximum performance.
This indicator directly depends on performance — after all, for pumping large volumes of water, an appropriate amount of energy is needed. And the power depends on two main parameters — electricity consumption and the load on the power grid, which determines the connection rules. For example, pumps with a power of more than 5 kW cannot be connected to ordinary household sockets; more detailed rules can be found in special sources.
Mains voltage
Operating voltage for which the pump is designed.
— 230 V. Standard voltage of household networks. Most of these pumps can be powered from a regular outlet, which makes them very convenient to connect. At the same time, this option is not well suited for creating high-performance units — already with a power consumption of more than 5 kW, certain tricks in connection will be required, and in general, 230 V provide less power than 400 V. Therefore, the such power supply is typical mainly for models elementary and intermediate levels.
— 400 V. This option implies power supply from three-phase networks with a voltage of 400 V. Such networks are rarely found in everyday life, but they are widely used in the professional field, including at industrial facilities — they are convenient for powering high-power equipment. Therefore, three-phase power is usually provided in professional high-performance pumps.
