Double-circuit electric heating boiler

Specifications

Double-circuit electric boilers today are presented in a wide range, and each manufacturer puts its design features into their basis. But they must all meet the following requirements:

• working pressure - 3-6 atmospheres;
• rated current - 35-40 A;
• maximum power - 20 kW;
• space for heating - 20-30 m²;
• total weight within 10-20 kg.

Double-circuit electric boilers can operate both at single-phase and at three-phase voltage. This indicator depends on the power. If its value does not exceed 12 kW, then they can be operated with both types of mains power supply. If the load exceeds the indicated number, then the connection requires only three-phase voltage.

Double-circuit electric boiler DHW and heating

Also plan a budget for the monthly costs of its maintenance.

Double-circuit electric boilers - pros and cons

If a modern residential facility cannot be connected to a standard heating and water supply system, then the solution is to purchase a high-quality double-circuit electric boiler.

When buying a boiler, each buyer considers the purchase in terms of an acceptable price, technical characteristics of the product and the economic feasibility of its purchase.

Let's take a closer look at the main advantages of using a double-circuit electric boiler in order to approach its purchase consciously.

The main scope of production boilers are private residential buildings. It is there that the productivity of their work is especially evident. Installation requires only a work surface, which is located in close proximity to the source of electricity.

It is an electric boiler that is able to provide an uninterrupted supply of water in a house that is located in a remote area and cannot be connected to a gas main.

And yet the main advantage of the product is its compactness and affordable installation.

We must also not forget that a double-circuit boiler, which performs the function of a heating system, is based on environmentally friendly technology. The heating electric double-circuit boiler does not emit any harmful substances and does not use indoor air for operation.

For its practical application, you do not need to take care of organizing a separate room, since the appliance is comfortably placed in a small area, thereby saving space.

And a double-circuit electric wall-mounted boiler can generally find its place on any wall. Therefore, there is no need to think about the installation of chimneys, ventilation systems and the development of complex documentary projects!

In the aggregate of these signs, real financial savings can be traced, especially if you purchase an electric double-circuit boiler made in Germany!

An important factor is the indicator of electricity consumption, where double-circuit electric boilers from Germany simply have no equal! The appliance works absolutely silently and does not emit any hum and vibrations.

As for the maintenance of the electric boiler, practice shows the incredible durability and durability of the unit. The only node of the system that requires close attention from the owner is the reliable connection of the boiler to the electrical network.

In the event of sudden surges in the electrical network, the electric boiler is subjected to loads that can disrupt its operation.

Timely diagnostics of the equipment will help to quickly identify the problem and get rid of it without consequences. Since the electric boiler works without the use of an open fire, repair becomes a very feasible task.

For additional, comfortable heating of a room in your house with the help of electricity, an electric corner fireplace is suitable. Believe me, it will fit into any interior.

How to calculate your heating costs before purchasing?

The calculation can be made on the basis of practical indicators, for example, to heat 10 square meters. m. of the premises, then the electricity consumption will be about 1 kW.

In addition, if it is planned to install a double-circuit boiler in the house to provide heating and hot water supply, then additional power reserves will be required.

The average statistical indicators of water consumption comparable to the technical capabilities of the electric boiler will also help to make an optimal calculation.

Knowing the average data on the heating of water by an electric boiler, and counting all the consumption points of water in the house, it is possible to accurately calculate the required volumes of the boiler to provide hot water.

A double-circuit electric boiler is connected to a conventional electrical network. At the same time, the boiler is equipped with automation, thanks to which it first turns on the function of forcing the temperature into the coolant, and then goes into standby mode and only maintains a constant temperature.

Features of the operation of electric boilers

For a heating system with an electric double-circuit boiler, there is no need to develop a complex documentary project, and there is no need to install a ventilation system or mount a chimney. The most economical are wall-mounted electric boilers for heating from German manufacturers. In addition, such devices do not create vibrations or noise during operation.

Sudden power surges can disrupt the operation of an electric boiler, since if single-phase electric boilers for heating are connected incorrectly, heavy loads will be placed on them. Thanks to modern diagnostic methods, in the event of a boiler malfunction, it can be quite easily identified. Since such a boiler works without an open fire, its repair will also be an easy task.

Even before you buy electric single-circuit or double-circuit heating boilers, you can calculate what the costs of its operation will be. For example, in order to heat a room of 10 square meters. meters, you will need a boiler with a capacity of 1 kW. If you plan to install a double-circuit boiler in order to organize not only the heating system, but also the hot water supply system, then you need to consider that some more power reserves may be required.

Advantages

A double-circuit electric heating boiler will be an excellent solution in a situation where it is impossible to connect the house to a centralized heating system. A double-circuit heating boiler will help organize not only the heating system in the house, but also the hot water supply system.

Heating and hot water supply system with electric boiler

When buying an electric boiler, you need to look not only at its price, but also at its technical characteristics. Only by studying the totality of all its parameters, one can understand whether it would be advisable to purchase one or another floor or wall-mounted electric heating boiler or not. Having studied the advantages and disadvantages of a double-circuit electric boiler, you can make a more informed decision about its purchase.

The advantages of this type of boiler include the following:

• They have a compact size;
• Do not create noise during operation;
• Easy to manage and do not require much effort during installation;
• Safe from an environmental point of view.

Under such conditions, the productivity of such boilers looks more obvious. To install a double-circuit electric boiler for heating a house, you will need to find and prepare a work surface for it.The boiler must be installed as close as possible to the power source.

A double-circuit boiler is installed near a source of electricity

By means of an electric boiler, a constant supply of hot water can be ensured. This is an excellent factor, especially in a situation where it is impossible to connect to the gas main.

Compared to other systems, in the case of a heating system powered by an electric boiler, there is no need to look for a separate room for this unit. In order to install wall-mounted electric heating boilers, you need very little free space. This saves usable space. A wall-mounted electric boiler will take up even less free space.

Device types

Today there are three types of electric boilers.

Depending on the installed heating element, they can be:

• electronic;
• tubular;
• induction.

In addition, double-circuit boilers can be single-phase and three-phase. For example, if the power of the device is over 12 kilowatts, then it is exclusively three-phase.

In addition, the boilers differ in the installation method and are divided into:

• floor;
• wall.

IMPORTANT!

Outdoor devices are considered the most powerful and efficient.

They are great for heating a large area, and at the same time do not take up too much space in the room. Wall-mounted options are even more compact and suitable for smaller homes.

How to save on heating

It does not matter how the dwelling is heated - by a boiler, stove or other equipment - sources that provide heat require prevention.What affects the electricity consumption of the boiler:. What affects the electricity consumption of the boiler:

What affects the electricity consumption of the boiler:

1. Dirty devices are inefficient - heat goes "into the pipe", because due to dirt there is a difficulty with the normal transfer of fluid in the system.
2. The pump will not operate efficiently if there is not enough refrigerant in it.
3. Electric converters should be flushed because a lot of dust accumulates inside.

Experts recommend setting your own mode in all rooms in order to save money. So, at night, during sleep, you can lower the temperature of the system by 2-3 degrees. However, if a child lives in the house, the temperature in his room should be stable.

Air locks form in batteries and underfloor heating, which worsen the operation of the system and increase the consumption of gas or electricity. Leaving your home for a while, you need to leave the system in working condition, but set it to 15-18 degrees.

Prices for the boiler ZOTA 24 Lux

ZOTA 24 Lux

Take care of window and door seals. Rubber bands lose their elasticity, and cracks appear on them. Due to the deformed seals, cold air enters the house and warm air comes out.

When using radiators or convectors, certain rules must be followed.

Not worth:

• obscure the equipment with furniture or curtains that prevent the flow of infrared radiation from the device;
• install decorative screens on radiators that interfere with the normal heating of the building and the movement of air.

The disadvantage of using batteries is that they give off heat to the wall on which they are fixed. To avoid this, a heat-reflecting screen should be glued to the wall behind the radiator.Explore the brick corner fireplace on our website.

6 Nuances when choosing

When choosing a boiler, of course, it is important to correctly determine the required power. You can roughly calculate its value yourself

For this, the volume of heated rooms is found out, and this result is multiplied by 40 watts. The power spent on heating water for the hot supply system is added to the answer received, that is, another 15–20%. If there are windows in the room, then another 100 watts is added for each, and 200 watts for the front door. According to such calculations, it is possible to obtain the necessary power for both a wall-mounted double-circuit electric boiler and a floor version.

In addition to this indicator, it will be important to pay attention to the installed automation. It is desirable that the device has heat and pressure sensors. Using induction heating, it will be possible to save on electricity consumption, but the purchase itself will be expensive

At the same time, heating with a heating element will not be economical, but purchasing a product will cost less.

Using induction heating, it will be possible to save on electricity consumption, but the purchase itself will be expensive. At the same time, heating with a heating element will not be economical, but purchasing a product will cost less.

Thus, by purchasing a double-circuit boiler, you can provide yourself with alternative heating and round-the-clock hot water in taps. But you should know that if it becomes necessary to provide water supply to several points of water intake, it is better to purchase a boiler with indirect heating.

The principle of operation of double-circuit boilers

Already from the name of these devices it can be understood that they have in their design two contours that do not intersect with each other.And if you look at the boiler from the outside, then four pipes are connected to it (except for gas).

The diagram above conventionally shows the boiler itself (pos. 1) and the power supply line connected to it (pos. 2) - a gas main or a power cable, if we are talking about an electrical unit.

One circuit closed in the boiler works exclusively for the heating system - a heated coolant supply pipe (pos. 3) comes out of the unit, which is sent to heat exchange devices - radiators, convectors, underfloor heating, heated towel rails, etc. Having shared its energy potential, the coolant returns to the boiler through the return pipe (pos. 4).

The second circuit is the provision of hot water for domestic needs. This kennel is constantly fed, that is, the boiler is connected by a pipe (pos. 5) to a cold water supply. At the outlet, there is a pipe (pos. 6), through which heated water is transferred to water consumption points.

Important - the contours can be in a very close layout relationship, but nowhere do they intersect with their "content". That is, the coolant in the heating system and the water in the plumbing system do not mix, and can even represent completely different substances from the point of view of chemistry. It is also important to know that double-circuit boilers do not work simultaneously for both systems - heating and hot water

Water heating is “in priority”, that is, if a hot water tap is opened somewhere in the house (apartment), the boiler switches completely to servicing the DHW circuit

It is also important to know that double-circuit boilers do not work simultaneously for both systems - heating and hot water.Water heating is “in priority”, that is, if a hot water tap is opened somewhere in the house (apartment), the boiler switches completely to servicing the DHW circuit. With closed taps - the heating circuit is serviced

When the taps are closed, the heating circuit is serviced.

A kind of exception to this rule can be considered boilers with a built-in indirect heating boiler. They constantly accumulate and maintain a supply of hot water with a certain temperature.

Popular models for installation in private homes

The most popular among users are electrical installations of manufacturers:

• RusNIT 209M (Russia, average price 16,500 rubles, power 9 kW, weight 12 kg, applicable for small buildings);
• EVAN Warmos QX-18 (Russia, average price 31,500 rubles, power 18 kW, weight 41 kg, mini boiler room);
• Valliant eloBLOCK VE12 (Germany, average price 33,500 rubles, power 12 kW, weight 34 kg, easy to operate);
• PROTHERM Skat 12KR (Czech Republic, average price 34,000 rubles, power 12 kW, weight 34 kg, high reliability);
• Kospel EKCO.L1z-15 (Poland, average price 37,500 rubles, power 15 kW, weight 18 kg, best option for large rooms).

electric boiler VAILLANT eloBLOCK VE 12 R13 (6+6) kW

Some of the most reliable are models of electric heaters from Bosch (Germany), Protherm (Czech Republic), Eleko (Slovakia), Dakon (Czech Republic), Kospel (Poland).

Despite the fact that the quality products of these manufacturers have a high price, they are equipped with a much larger number of functions than domestic counterparts.Russian heating devices are also of high quality, but due to the simplicity of design and inexpensive components, they have a lower cost. Gained great popularity electric boilers of domestic companies Evan and RusNIT.

Advantages of an electric boiler with two circuits

Wespe HeiZung WH.L Kombi two-level electric boiler

Despite the relatively high cost of electricity, an electric double-circuit boiler is the most popular unit for organizing heating in country houses. Its compact size, safety, efficiency, easy installation, easy operation and attractive appearance attract consumers.

By fulfilling a number of certain conditions, you can significantly reduce energy consumption and reduce overall costs to create a comfortable indoor microclimate. On such equipment, there must be systems of stepwise power control and programming of the optimal operating mode.

In many regions of Russia, there is a reduced tariff for nighttime consumption of electrical energy, therefore, by setting the highest heating efficiency at this time of day and reducing it during the day, you can save money. This measure is justified, since during the day there is a minimum number of its inhabitants in the house.

Additionally, the inclusion of a double-circuit electric boiler boiler can be programmed for the night period: the prices for energy consumption will be minimal, and the water will heat up by the time all household members wake up.Installing additional temperature controllers on each heater will reduce overall costs by almost 30%, while you can set an individual thermal regime for each individual room.

The advantages of double-circuit electric boilers for home heating are:

• high efficiency;
• low noise and vibration levels;
• the maximum level of automation of the heating process and maintaining the set temperature;
• no need to allocate and organize a separate room for the operation and storage of fuel);
• Ease of controls;
• ease of maintenance (no cleaning of burners required);
• exclusion of the installation of a chimney for exhaust gases;
• ease of installation;
• environmental friendliness (does not emit harmful gases);
• variety of sizes and designs;
• possibility of installation on the wall;
• affordable price;
• low maintenance costs.

An additional advantage of an electric double-circuit heating boiler is the ability to create a combined heating system with it, using it with gas, solid fuel equipment or in tandem with solar systems. This option will be very relevant for houses with a large area, when electricity costs make the use of one electrical unit unprofitable, and power outages can leave the room without heating.

How to choose the power of the heating boiler

Since manufacturers offer a large selection of appropriate units of different capacities, then, given the relatively high cost of electricity, it is necessary to carefully select the size of the heating equipment.

It is known that power consumption of the electric boiler with a power of 1 kW, operating at full load for 1 hour, is about 700 kW (taking into account the losses for heating the parts of the installation). Thus, the consumed thermal power of an electric boiler with a tank with a capacity of up to 1000 liters, operating at full load for 1 hour, will be 700 degrees. However, such a load on the unit is never complete: the intelligent automation of the equipment always regulates the power required for heating or water heating purposes. This takes into account the area of ​​\u200b\u200bthe premises and the temperature difference (for the external circuit) and the desired water temperature - for the internal one. Based on this, the actual required power is only 33 ... 50% of the theoretically required.

The reduction in energy consumption is ensured by the following factors:

1. Reliable thermal insulation of the room where the unit for heating the house is installed.
2. Even at the planning stage of premises intended for heating, their height, the configuration of plumbing fixtures and other consumers, the thermal efficiency of radiators, the presence of thermostats, and so on are taken into account; this can significantly reduce unproductive power losses.
3. Boiler location. The optimal arrangement of pipelines allows to reduce the value of hydraulic resistance and reduce heat dissipation in heated rooms.

The exact heating area mainly depends on the heat capacity of the building U, which is the value of the total heat loss through the building material as a result of continuously occurring processes of heat conduction, convection and radiation.This value is expressed as the rate in watts at which heat is transferred through 1 m² of building material surface at a temperature difference of 1 ºC between indoor and outdoor.

In practice, the following empirical relationships are used between the heating area F and the rated power of the boiler N (they can be used if U = 0.3, and the height of the premises is H = 2.7 m):

F, m2	50…60	60…80	80…110	110…140	140…180	180…220	Over 220
N, kW	Up to 5.0	Up to 7.5	Up to 10.0	Up to 12.5	Up to 15.0	Until 22.5	From 24.0

Device features

Any heating device is designed to heat the coolant and supply it to the system. Double-circuit electric boilers are no exception, they also perform this function, but at the same time they are much simpler in terms of design than samples using gas as fuel.

According to the principle of operation, they are divided into single- and double-circuit. The latter are able not only to heat the room, but also to prepare hot water for household needs.

The coolant in such devices is heated using:

• heating elements
• electrodes
• infrared heaters

It is advantageous to install double-circuit electric boilers in houses that are not connected to hot water supply, since it is able not only to maintain a comfortable temperature in the room, but also to supply residents with hot water in an amount sufficient to meet the needs of the family. They are safe to use, do not emit harmful impurities into the atmosphere and can operate in automatic mode, which is convenient for those who are often away from home.

What should the buyer consider?

In addition to the classification given in our review, there is also a simpler division of electric heating boilers into types that is understandable to any person.Often, he is guided by these parameters when choosing.

1. Mounting method:

• Wall-mounted electric heating boilers are often installed in apartments and small private houses. Aesthetic and neat, they can develop quite serious power.
• Floor-standing - these are already industrial or semi-industrial models, giving out from 24 kW and above.

2. Electrical connection:

• Single-phase - economical electric boilers of small capacity, it is enough to plug into a 220 V socket.
• Three-phase - devices of medium and high power, the load from which a conventional household network can no longer withstand. Under them, you need to specially conduct a line for 380 V.

3. The number of connected branches: here, like all heating boilers, there is a division into single- and double-circuit models. The former work only for heating, the latter additionally provide a private house with hot water in taps.

Plumbers: You'll pay up to 50% LESS for water with this faucet attachment

4. All these features must be taken into account when choosing, but the main thing is still performance. It depends on it how much electricity the heating electric boiler consumes, and what area it can heat. The required minimum is 100-110 W per square meter, but the worse the housing is insulated, the more power the device should have. Ideally, the heat loss of the entire building should be calculated for the lowest temperatures in the region, and the result should be increased by 3-5% to obtain the desired performance.

5. Since such equipment is technically more complex than similar gas and solid fuel models, it is still necessary to choose the right electric boilers for heating a private house.Autonomous systems impose certain requirements on them:

• The current strength is not higher than 35-40 A.
• The diameter of the electric boiler nozzles is in accordance with the connected circuit, but not less than 1 ½ ″.
• The pressure in the system is a maximum of 3-6 atm.
• Power adjustment - at least within 2-3 steps.

In addition to the parameters of the electric heating boiler, you will have to ask what the network itself is capable of. For example, in country houses, the voltage can be weak and drop to 150-180 W in the evenings, and most imported equipment will not even turn on under such a load. Keep in mind that a too powerful electric boiler of 10-15 kW will already take voltage from neighbors down the street. Also take an interest in the characteristics of the transformer, from which the houses in your part of the village are powered. Often, to connect a high-performance electric boiler, you have to pull a branch around.

“For the third year I have been operating a single-circuit Protherm Skat 9 in the country. What can I say? The electric boiler is reliable, compact, easy to operate. For my taste, even too much - I just want to connect a couple of sensors and make some kind of remote unit + remote control so as not to run to it. Of the minuses - the lack of protection against surges in the network, the internal pump is noisy, and heating a house with such an electric boiler cannot be called economical.

“In a private house, there is Zeus from Ferroli for 6 kW - I chose it based on reviews on the Web to help a wood-burning fireplace. I poured glycerin into the heating system, since we visit the house irregularly. In the very first winter, a problem arose - the electric boiler did not start due to the low temperature of the carrier (at that time + 1 ° C). I warmed everything with improvised means to + 5 ° C, only then did it turn on. Otherwise, it works well if the voltage is stable.On the first day, the electricity consumption turned out to be not economical - about 100-120 kW.

“As part of my service, I had a chance to encounter an ion boiler - I had previously seen this miracle of technology only in pictures with a description. In fact: Galan (as I recall) refused for the third month of work. They pulled out the rods in an incomprehensible raid - they removed it neatly with sandpaper. We tried, but the electric boiler heats up weakly. They fought for a long time until they got to the bottom of the truth: the owners poured ordinary water into the circuit. Only when the coolant was changed the next day, everything was fine. In general, capricious technique.

Vladimir Khabarov, St. Petersburg.

“We struggled with the search for an electric boiler: we rummaged through a bunch of information, re-read mountains of reviews and tortured a dozen consultants to death. Chose Evan Warmos-QX for 12 kW. Heating of a country house was considered only electric, and we also have underfloor heating in some rooms. The model has everything you need: 3 power modes, an input for a separate sensor, your own thermostat. Expensive, but when the electric boiler was set up for us, I felt like the mistress of a “smart home” – even if only for the winter time.”

Alexandra, Moscow region.

Prices and features

Heating organization options

If it is possible to connect to a gas main, we recommend choosing a gas boiler without hesitation, even despite the complicated process of its design. Otherwise, from an economic point of view, heating electric boilers are far from always justified.

Elekotle have compact dimensions, require a minimum of piping and have a modern design that allows you to install them anywhere.

The most financially profitable option is the temporary use of an electric boiler.For example, in a country house or in a second country house, in which the owners come only from time to time, but do not live permanently. In such cases, a 1.5-3 times lower initial cost of the boiler, its installation and connection will cover the cost of electricity during operation for a long time to come.

Since all electric boilers (with the exception of induction ones) are designed to use only water that freezes at negative temperatures as a heat carrier, it is desirable in such a situation that the boiler has the ability to connect an external control. For example, using a GSM module or a Wi-Fi module. Firstly, this will allow you to control the electric boiler remotely and set the desired temperature even before arriving at the house. Secondly, the remote control will give you confidence that in the absence of the owners, the boiler maintains a positive temperature, and the system is not damaged (otherwise you will immediately receive a notification).

Another great option is to use an electric boiler as an additional or backup heating equipment. For example, in a scheme using a buffer tank in case of problems with the operation of the main boiler and heating at a nightly rate, or for a floor heating circuit. For such purposes, an inexpensive electric boiler of 3-6 kW worth 11-15 thousand rubles, operating from a single-phase electrical network, is quite enough. He will be able to maintain temperatures above +18 ° C in a house of about 100 square meters. m. for 2-2.5 days, or to fully ensure the normal temperature of the warm floor on an ongoing basis.

Simple and compact low power model EVAN EPO.

As the main heating equipment, hot water electric boilers can only be used with a free budget.The only exceptions are small and insulated houses with an area of ​​​​up to 90-100 m2. For heating such an area, taking into account medium or dense insulation, an inexpensive electric boiler with a capacity of 6-9 kW will be sufficient. The low cost of the boiler unit and its installation, as well as the absence of the need for its coordination with the services of Energonadzor, will pay off the high operating costs for another 1-3 heating seasons.

The device of electrode boilers

Electric mini boilers "Galan" electrode type are available in three versions:

• single-phase HOCAG have a power of 2, 3, 5 and 6 kW;
• three-phase GEYSER and VOLCANO - 9, 15, 25 and 50 kW.

They are compact in size and light in weight. The most powerful device weighs 11.5 kg, and its diameter is 180 mm with a length of 570 mm, and it can heat the space up to 1650 m3. The smallest boiler has a diameter of only 35 mm and a length of 275 mm, its weight does not exceed 0.9 kg, and the heated room can reach 120 m3.

Ionic boilers are made up of several elements. Inlet and outlet pipes are located on the metal case, enabling unhindered circulation of the coolant (water or antifreeze). Thanks to the case, ionic processes occur, since it performs the function of an ionizer. From above, the case is protected by a plastic casing, which improves the electrical insulation of the device and reduces its heat transfer. Inside a single-phase boiler there is one electrode, and in a three-phase boiler there are three electrodes with a terminal group brought out.

Electrode coppers "Galan" are delivered assembled. The automation system that allows you to manage and control the heating system is not included in the equipment package, therefore it is purchased separately.In addition, you need to buy an expansion tank and, if necessary, a pump.

Without the installation of automation, the GALAN company does not give a warranty period for the operation of the boiler.

Also, the manufacturer declines responsibility in case of improper installation or operation of the electrode heat generator, the presence of mechanical damage and the presence of foreign objects in the system.