Modern companies engaged in production of equipment for heating, are constantly trying to offer new more advanced systems. One such technology is the electric boiler with expansion tank, a pump and an additional circuit for hot water supply. This unit is in fact a miniature boiler collected.
Features
Electric boiler is not large or bulky components that are commonly found in the construction of such devices operating on other energy sources. It is in this regard, most popular wall-mounted units. In this case most often for easy installation they are equipped with additional components. And one of them is a circulating pump. It is considered a useful element, especially if the boiler is provided a second circuit for hot water. With the help of this part solves two main tasks:
- Give the heating system coolant certain inertia, keeping the speed during operation.
- The aggregates of double-flow fluid passes through the heat exchanger for heating water for domestic purposes.
It is important to clarify that the various manufacturers supply their installation of the pump, which correspond roughly to the power of the unit. When this is calculated the average value for water resistance.
However, there are many schemes heating system. Part of them has a large flow resistance, which can not handle the standard circulation systems. In this case, with integrated pump unit will not provide a preheated liquid supply for all components of the system.
One has only to count. For example, imagine there are pump capable of pumping pressure up to 0.8 bar. The source is located in the lower room three-storey house. In order to deliver coolant to the top, the pressure must be 0.6 bar. In addition, it is necessary to give fluids and horizontal inertia. The latter is calculated as follows: 10 m pipe lengths parallel to the floor, it is considered as 1 m of vertical. As a result of simple mathematical operations, we conclude that the embedded component is clearly not enough for the proper operation of the entire heating system.
Important! If thinks buying the device with a circulating pump for the high-rise building or an extensive system, you must perform all calculations in advance. After that, verify the results with the parameters of the unit, to find out all you need from a specialist in charge of the implementation of the equipment. This will help in the future to avoid the need to purchase any additional components.
Sometimes there are situations when all the boiler was purchased and installed, and only then found out about the lack of a supercharger. In this case, the additional costs can not be avoided exactly. The problem is solved as follows:
- A detailed calculation of water resistance. This is best done with the assistance of appropriate expert.
- Based on the data corresponding to purchased additional pump.
- In addition, the system necessarily introduces gidrostrelka that allows the blower to operate only in the small loop.
- A separate pump is placed on a large ring. heating circuit will look like this:
Work combi boilers
Electric boilers dual circuit pump have complicated working principle. For example, they need a periodic supply of heat exchanger fluid, which raises the temperature of the water for hot water supply. Here there is the alternate action of the supercharger in the two circuits. Switching is done via the two-way valve which is motorized. Commands arrive from the respective controller. This is achieved when the hot water tap is opened. Actual flow sensor is fixed and transmits the signal on the controller.
Once the flow is switched, the pump starts to pump liquid to the heat exchanger, while the valve is closed. In most cases, double-circuit units are as follows:
Where:
- A flask with heating elements and an air trap.
- A housing having mounting holes.
- Controller.
- Expansion tank.
- Pump with two-way valve and the heat exchanger.
Instantaneous heater has narrow channels. Therefore supercharger selected on the basis of overcoming water resistance, in the event of scum.
Important! The automation system in most of the units programmed to run periodically pump even in the summer. It is specifically provided that for downtime rotor is not out of order.
dignity
Growing demand for this type of heaters due to the many advantages:
- A wide range of models that allows you to choose the equipment that is ideal for your conditions. No matter what kind it is necessary to heat the room - an industrial plant or a small country house - you can always find the unit with suitable conditions.
- Economic aspect. The efficacy models produced recently considered as high as possible - the efficiency reaches 99%.
- Built-in pump also helps to improve the quality of work. The blower has economical consumption of energy. The circulation liquid is carried along the contours of a desired rate. It not only provides rapid heating of premises, but also allows for economical option to maintain the desired temperature.
- When the system does not emit any combustion products, making the whole unit safe for man and nature. However, there is no need to install the chimney.
- Management is optimized and user-friendly. This allows you to control and change the temperature in the room ordinary man in the street. In most cases, models are available which are equipped with additional elements that automate the system. Therefore, adjustment is rarely done.
disadvantages
Despite the obvious positive aspects of this type of plant has only a few, but important drawbacks:
- The cost of electricity is higher than many other energy resources.
- Complete dependence on the current. In case of interruptions, the system can be frozen at all, which fully bring her down. A renovation would be costly. This will take some time. And it is not always, especially at temperatures below freezing outside. That such situations did not appear, you need to have an alternative source of heating.
- It is important to understand exactly what kind of power will be set. It is also necessary to take into account the possibility of the pump. Otherwise, in the future may need to purchase and install additional elements.
Today, many electric heaters have a built-in pump. In addition, they are provided and additional details. On the one hand, these units have a price higher than the ordinary. But on the other - built elements are mandatory. As a result, buying a unit with a supercharger, the owner even save their money.
