Boiler for gas boiler. Boilers gas indirect heating. Independent and simple heating setup: how to connect a boiler to a double-circuit gas boiler

Systems are in high demand today. autonomous heating in which gas boilers are used various kinds and types. In private houses, a single-circuit boiler is mainly used floor type. Also, single-circuit ones are wall-mounted, and they are most often used in multi-storey buildings.

Single-circuit gas boilers are used to heat the coolant that fills the heating system. The single-circuit boiler does not prepare water for hot water supply. In rooms where the heated area sometimes exceeds three hundred square meters, are used floor standing boilers. These heating devices are much more powerful than wall-mounted ones.

Wall-mounted single-circuit heating devices are most often used in high-rise apartments, and can heat an area of up to three hundred square meters. These boilers are much more compact than floor-standing ones, and weigh a little more than 40 kilograms. The wall-mounted single-circuit boiler organically fits into the interior. Also, these wall-mounted devices are more functional than their floor counterparts. The power of the most advanced models of wall-mounted single-circuit boilers is no more than 35 kilowatts.

Any complex elements and mechanisms. This boiler is made up of:

burners;
heat exchanger;
control unit;
water pump;
turbine electric motor (if the boiler has a closed combustion chamber);
pressure gauge;
sensors;
shutoff valve.

Wall-mounted single-circuit boilers can be equipped with an expansion tank, which is hidden under the boiler casing. Also expansion tank it can also be part of a floor heating device, which has a small power.

What is a double-circuit boiler

This heating device not only heats the coolant, but is also intended for cooking hot water. A double-circuit boiler has a more complex device than its single-circuit counterpart. The most complex device has a double-circuit heating device, which is equipped with a three-way valve.

There are double-circuit heating devices that are equipped with a pair of heat exchangers. One heat exchanger is responsible for heating the water in the heating system, and the second heats the water for water supply. The most rational design has double-circuit heating devices, which are equipped with a bithermic heat exchanger. Such a heat exchanger is two in one. Inside the bithermic heat exchanger there is another heat exchanger, which is designed to heat water for domestic purposes. But boilers with separate heat exchangers are considered more popular models.

Double-circuit gas boilers are good because they solve all the problems associated with the preparation of hot water by heating the room. Such heating devices are quite compact, and organically fit into any interior. The design of a double-circuit heating device resembles the design of its single-circuit counterpart, which is also supplemented:

a second heat exchanger (if the boiler design provides for it);
3-way valve (if the heat exchanger is not bithermic);
inlet and outlet for the DHW pipeline.

Pros and cons of a double-circuit boiler

A double-circuit heating device has many advantages. The main advantage of this device is that thanks to such a boiler, you can simultaneously heat the room and use hot water. Using a double-circuit boiler will save you from the additional costs that may be associated with the purchase of a boiler. Also, the external attractiveness of double-circuit heating devices should be attributed to the indisputable advantages. These boilers look aesthetically pleasing not only in the boiler room, but also in any other room.

Modern double-circuit heating devices have a high efficiency, which can significantly reduce the cost of public utilities. Double-circuit boilers allow you to perfectly set the temperature inside the room, as well as adjust the temperature of the water in the DHW pipeline.

These heating devices are not without several disadvantages, the list of which includes:

turning off the heating at the time of hot water disassembly;
relatively low productivity in the preparation of hot water.

What is an indirect heating boiler

Today, more and more people are resorting to the use of boilers. indirect heating. This useful device allows you to use the heat of a gas boiler more efficiently. IN winter period when the heating system is turned on, the indirect heating boiler works from this system, and in the summer, when the boiler does not work for heating, such a boiler works from an electric heating element or (if settings allow).

The heating of water in an indirect heating boiler does not occur in a direct way, but, as it were, in passing. Inside such a boiler there is a rather large coil, inside which the coolant from the heating system circulates. Thus, the gas boiler heats the water in the indirect coil, which circulates in the heating system with the help of a pump, and the heat exchanger heats the water in the boiler. Such heating of water for the DHW main is recognized as the most cost-effective.

The casing of this boiler is mainly made of steel sheet, and its inner part is made of stainless steel. between external and internal parts The indirect heating boiler contains a special material that conducts almost no heat. The design of such a boiler is very similar to the design of a thermos.

As a rule, an indirect heating boiler is installed near the heating boiler. The heated coolant must pass through the boiler first. The water in such a boiler will always be hot, and several hot water taps can be connected to this boiler at once. Heating of hot water in an indirect heating boiler is carried out without prejudice to the operation of the heating system.

In most cases, such a boiler is equipped with a highly efficient heat exchanger, which is made of special steel. More expensive indirect heating boilers are equipped with heat exchangers that are made of brass. The boiler heat exchanger has the shape of a long spiral, which allows you to very quickly heat the water to the temperature that the water in the heating system currently has.

Pros and cons of a single-circuit boiler and BKN

A boiler that prepares hot water by indirect heating is often used in conjunction with a single-circuit heating device. This tandem has both advantages and disadvantages. The main advantage of such a boiler is that this device practically does not require any maintenance and financial costs throughout the entire period of operation. An indirect heating boiler does not overload the power grid with excessive load, which is very important for those regions where voltage drops are observed.

An indirect heating boiler, which works together with a single-circuit gas boiler, is very convenient to use. Such a boiler rationally consumes water, since it does not require draining a large amount of water until hot water comes out. Such a boiler heats water very quickly, and several mixers can be connected to this device, which can be located in different places in a house or apartment.

The heat exchanger of the indirect heating boiler operates under conditions that completely exclude the formation of scale. Also, the design prevents the formation of harmful microorganisms inside the device. An indirect heating boiler does not require periodic cleaning and can operate for more than ten years without any maintenance.

The heat exchanger of the indirect heating boiler has a special protection against corrosion. This protection very effectively protects these elements of the boiler from stray currents that occur in waterways.

Indirect heating boilers have several minor disadvantages, which include:

more high price than their electrical counterparts;
indirect heating boilers are larger than conventional boilers;

Using a single-circuit boiler and a conventional boiler

Along with indirect heating boilers with single-circuit gas boilers, conventional boilers are also used. Conventional electric boilers are slightly cheaper than indirect heating boilers, but they are significantly inferior to them in many parameters. A conventional electric boiler heats water for much longer and this device needs regular maintenance.

It is advisable to clean the electric boiler from scale once a year, and also periodically change the anode, which serves as protection for the electric heater. An electric boiler also needs a reliable power supply, and an independent cable must be laid to this device. electric line. Also, this water heater seriously loads the power grid - in general. Therefore, it is better to use an electric boiler in those rooms where the wiring has a margin of safety.

Conclusion

A single-circuit boiler with an indirect heating boiler can be considered a very effective tandem, which is practically in no way inferior to a double-circuit heating device - in terms of convenience. The use of an indirect heating boiler with a single-circuit boiler allows more efficient use of the thermal energy of the heating device, and this significantly reduces the cost of housing and communal services.

Hot water is used daily in everyday life, and the central water supply does not fully satisfy this need.

In some places, there is no opportunity to connect to a common highway at all. In this regard, gas boilers have become widespread.

A gas boiler is a heating equipment for heating a coolant that works by burning gas. Some types of boilers can provide both heating and hot water supply (DHW) at the same time - these are double-circuit boilers. Others are used only for heating - single-circuit.

A double-circuit gas boiler heats cold water in a flow pattern, which ensures a continuous flow. Heating occurs due to direct heat from the flame.

The water consumption depends on the power of the boiler. On the one hand, this is very effective method providing hot water, but on the other hand there is a drawback.

For heating, water from the water supply is used, it has a high hardness index (salt content). Therefore, when heated, scale formation occurs on the walls of the heat exchanger.

If the scale formation process is not controlled, this can lead to a malfunction of the gas boiler.

On a note.
To reduce the hardness of heated water, special devices are used - softeners.

DHW with a single-circuit boiler

Despite the clear advantage of double-circuit boilers, both types are popular. In fact, they are also able to participate in the heating of hot water for the household, but this requires an additional water heater.

Such a heater is an indirect heating boiler.

Indirect heating boiler

A boiler is a tank inside which is located a heating element, more often . That is, the energy source is located inside the boiler itself. In our case, an indirect heating boiler is used.

"Indirect" means that there is no source of thermal energy inside the boiler. Heating occurs due to heat from a gas boiler. Inside the boiler, as a heating element, there is a coil.

The same coolant that is used in heating enters this coil and heats the cold water that fills the boiler. In other words, the heating medium heats cold water for domestic purposes.

The design of the indirect heating boiler includes two non-communicating water circuits:

The heating water circuit is a heating circuit. The flow diagram of the coolant begins in the gas boiler, then it enters the boiler coil, gives off its thermal energy cold water in the boiler and returned back to the boiler for heating. This cycle repeats continuously.
The domestic water flow circuit is a heated circuit. For heating, water from the water supply is used, it enters the boiler tank, in contact with the heat exchanger, the water heats up and at the outlet of the boiler has a temperature of 45-65 ° C.

Types of indirect heating boilers

Due to the high demand for water heating equipment, they have many different modifications.

The wall-mounted or suspended boiler has a compact size. Due to the installation on the wall takes up almost no space. These types of boilers have found their application in apartments and small private houses.

A floor or stationary boiler has a large selection of sizes and capacities, and can also be made in a vertical and horizontal arrangement. This type of boiler is able to provide a constant large supply of hot water.

To heat water in an indirect type boiler, you can use any heat source: a liquid fuel or solid fuel boiler, an electric boiler, a wall-mounted or floor-standing gas boiler.

There are types of indirect heating boilers that are equipped with additional electrical elements heating. If the gas boiler for some reason cannot function normally, you can always heat the water with an electric heater.

The tank is made of stainless steel with additional protective coatings. The heat exchanger is made of copper, as it has good thermal conductivity. To save heat, the boiler is packed in heat-insulating material.

The main characteristics of the indirect heating boiler

Indirect heating boilers have the following characteristics:

tank volume;
water heating rate;
power consumption;
heat losses;
the presence of an additional heat source (heater).

Attention!
For the normal functioning of the boiler, heating and indirect heating boiler, it is necessary to correctly select the power of the gas unit.

The power of the gas boiler must be at least twice as much as the energy consumed by the boiler. Otherwise, the water in the boiler will not heat up fast enough, and the heating system will not work efficiently.

Attention!
The gas boiler connection scheme should provide for the shutdown of individual coolant consumption circuits. To be able to turn off the heating, but at the same time the boiler continued to function and vice versa.

For example, the power of a boiler for a house of 100m2, with a rough calculation, can be 20 kW. (2 kW. per 10 m2 area). In this case, the maximum boiler consumption must not exceed 10 kW. But it is best to have a margin of boiler power.

Thus, with the right selection of equipment, it is possible to achieve normal and continuous operation of heating and hot water.

People who do not have enough space in an apartment or house to equip a boiler room often try to save space and purchase a double-circuit boiler. This is a smart choice, however, in order to provide the family with hot bath and household liquids, care should be taken to have additional equipment. Choosing a suitable tank is not difficult, you can take a tank or other container. However, to make the task easier, you can simply buy a special gas boiler with a boiler.

Possibility to connect a boiler

A boiler for a gas boiler is a storage tank, inside of which a heat exchanger is placed. This model, in fact, is a double-circuit, as it has a connection for both the heating system and the hot water supply.

Double-circuit models have a built-in flow-type water heater, which single-circuit models cannot boast of. The advantage of a gas boiler with a built-in storage tank is that there is no need to create an indirect heating boiler. In addition, water is heated much faster than in single-circuit versions and does not reduce the efficiency of the heat carrier for heating.

A separate boiler can also be connected to double-circuit boilers to provide more hot water. Such equipment belongs to the technique of layer-by-layer heating. You can also buy a double-circuit gas boiler with a built-in indirect heating boiler. Such devices are combined with the boiler, although separate devices can be purchased. Depending on what is best for you: ease of transport and installation or compact placement - you can choose a separate or adjacent model.

If a single-circuit boiler is already installed, you can purchase a special layer-by-layer heating boiler, which is equipped with flow heater liquids. If you need to save space in the apartment, you can opt for a single-circuit boiler with a built-in indirect heating boiler.

Heater power

Depending on the power of the gas burner, the flow rate of the liquid in the instantaneous water heater varies. Also, the rate of water heating depends on design features heat exchanger. A feature of heating the liquid is its short contact with the heat exchanger, therefore, in order to warm the coolant to the desired temperature, a lot of heat is needed. To increase the performance of the heating element, it is necessary to increase the power of the burner and increase the gas flow.

In order for the water temperature in the shower to be 40 degrees, you will have to adjust the burner to a generated power of 20 kW, but if the burner is not designed for such power, then take warm shower impossible. The bath also needs a powerful burner, as the water must be heated quickly in large volumes for a normal set.

Most boilers have a capacity of about 20–30 kW, and 10 kW is enough to heat a house. Thus, all the difference can be used to provide domestic hot water. Modulating burners have been developed for boilers with water heating, which cover the range from 30 to 100 percent of the maximum power.

However, even the weakest boilers have excess power, which leads to frequent switching on and off of the burner. This process leads to rapid wear of equipment and increases fuel consumption. These problems make the purchase of a more powerful boiler model to ensure more hot liquid unprofitable and unjustified solution.

That is why in dual-circuit models a boiler is provided that contains hot water, which allows it to be given in large volume while taking a shower or bath. Thus, layer-by-layer heating of water is optimal: it ensures the normal operation of the equipment and does not lead to burner wear.

In double-circuit models with stratified heating, water is heated using a plate radiator or a tubular water heater. The presence of an additional heat exchanger is beneficial in condensing models, since it provides additional heat from the combustion products. The liquid enters the boiler with layer-by-layer heating already heated, which allows you to quickly prepare the hot liquid in the required volume.

Floor double-circuit gas heating boilers with a boiler have a number of advantages.

The flow of hot water into the upper layers of the boiler allows you to take a shower 5 minutes after turning on the heat exchanger. In contrast, boilers with an indirect heating boiler provide longer heating of the liquid, since time is spent on the convection of warm water from below the heat source.
The absence of a heat exchanger inside the storage tank allows you to collect more warm water for domestic needs. The performance of such boilers is 1.5 times higher than in models with indirect heating.

Work of a gas boiler with a boiler - video

FAQ

Most often, people do not understand why there is also a boiler in the boiler. The fact is that the built-in model allows you to ensure comfortable use of warm water. This allows you to quickly ensure the availability of hot liquid when opening several points of water intake, which a conventional double-circuit boiler will never cope with.

Moreover, there are times when a small pressure of warm water is needed, which a boiler with instantaneous water heater, since the lower limit of the head is limited in it.

Floor models with a built-in storage tank look like a refrigerator. They hold up to 100 liters of liquid, which is quite enough to provide warm water to the whole family.

The connection diagram of a double-circuit gas boiler with a boiler practically does not differ from the standard connection. An important difference is the need to connect not only to the heating system, but also to the water supply. It is necessary to crash into the system before the water exit points, but after the toilet bowl. This will ensure that hot liquid exits from all water intake taps. It is best to consult with the masters to connect everything correctly.

1.
2.
3.
4.
5.

Gas boilers are generators that generate heat for heating indoor air and heating water by burning liquid fuel - gas. It is possible to install a gas boiler with a built-in boiler only if it is possible to connect it to the main gas pipeline. In the absence of gas supply, it is impossible to use such heating equipment. What gas boilers look like can be seen in the photo.

Differences between single and double-circuit boilers

A single-circuit gas boiler with a boiler can only heat the room - it does not have an integrated system that is necessary to provide hot water. But if you connect a remote boiler with a heat exchanger to it, then it will be able to heat water for domestic needs.

Double-circuit boilers have a more complex device, respectively, and they are more expensive. They serve to heat water not only in the heating system, but also in the plumbing. In order to increase the amount of heated coolant, you can connect a boiler to such boilers.

Boiler features

Boilers are used to organize the supply of hot water for the needs of consumers through taps. Having such a device in their house, its residents will not depend on the presence of hot water in the tap.

Boilers can use different types energy:

household gas;
electricity;
thermal energy generated during the operation of the boiler.

Regardless of which type of device is chosen by the consumer, its installation must be agreed with the competent organizations and entrusted to specialists so that there are no problems later. It is very important to connect the equipment correctly - in this case, a double-circuit gas boiler with a boiler can be highly efficient and provide hot water that will be supplied not only to the heating system, but also simultaneously through several taps (see also: "").

The location of the boiler in the house

There are gas boilers with a boiler wall and floor. It is floor appliances that are the most common. They are recommended to be placed in utility rooms. Usually they have a mass of less than 100 kilograms and burners of atmospheric or blast type.

Wall-mounted boilers are often installed in apartments and small houses. They weigh less than 100 kilograms and small size so they can be hung on the wall. To save space, you can install the boiler in a niche (read: "").

Advantages of double-circuit boilers and their use

Double-circuit boilers are more functional, but also more expensive. Before buying, you should decide how exactly the equipment will be used.

Currently, the following models of double-circuit boilers are on the market:

with a flowing water heat exchanger;
with a built-in boiler, designed for 40-60 liters;
with a built-in boiler for a volume of 80-500 liters.

The choice of a boiler is influenced not only by the price and installation method, but also by the needs of the residents of the house for hot water.

Mounted boilers with a flow-through water heat exchanger have the following features:

simultaneously heat rooms with a total area of up to 300 "squares", and also provide two water points;
small size allows you to embed equipment in a wall niche;
low cost;
simple and inexpensive installation;
simple management;
the presence of elements of self-diagnosis.

Gas heating boilers with a boiler with a volume of 40-60 liters have a number of advantages:

are able to heat a house with an area of up to 300 "squares" and provide simultaneous water supply to 4 water points at once;
Ease of Management;
the presence of a self-diagnostic system.

Boilers with a boiler of 80-500 liters are of three types. The first and second of them include devices that are equipped with everything necessary, have small dimensions and allow you to fully control the system. Boilers of the third type require the installation of additional equipment and various components. As a result, you will need to spend a lot of money on the purchase of all the required elements and the work of qualified specialists.

The device of a gas boiler with a boiler, a detailed video:

How to choose a gas boiler

When choosing a gas boiler for your home, you need to pay attention to various specifications(more details: ""). As for the material, such a device should be made of cast iron or steel. Steel models are more susceptible to corrosion, which is caused by condensate. Their service life usually does not exceed 15 years. Cast iron boilers serve up to 50 years, but cost much more than steel and weigh twice as much (read: "").

It should be borne in mind that floor-standing gas boilers cannot be installed in residential premises - a basement or utility room must be allocated for them. The floor in the room where the boiler will be installed must be made of non-combustible material. Installation wall devices made easier. They are small and can be placed in wall niches or furniture cabinets. In any case, connecting the boiler to gas boiler must be performed by specialists (read: "").

Boilers with built-in gas burners do not allow you to independently replace a burner that has failed. Blast products are bought separately from the boiler, and in case of breakage they can be replaced independently. In addition, devices with this type of burner have a higher efficiency. See also: "".

The main characteristic of boilers is power. If the house is well insulated, and the ceiling height is not more than 3 meters, then 1 kW is enough to heat 10 "squares". Thus, for a house with an area of 100 "squares" you should purchase a device with a power of 10 kW. If the building does not have good thermal insulation, and the ceiling height is more than 3 meters, then the boiler capacity should be greater. In order to also get heated water for domestic needs, you need to choose equipment whose power is 30-50% higher than the recommended one. It is better to entrust the connection of the boiler to a double-circuit boiler to specialists.

Now we will figure out how to choose a gas boiler with a built-in boiler and what is the difference between single-circuit and double-circuit ones. In the end, let's see who makes best models in this segment.

It is possible to establish and equip the hot water supply system in the house different ways. One option is to install a gas boiler with a built-in boiler.

You can find out the price and buy heating equipment and related products from us. Write, call and come to one of the stores in your city. Delivery across all territory of the Russian Federation and the CIS countries.

Boiler with built-in boiler

Differences and advantages of single-circuit and double-circuit boilers

A single-circuit gas boiler is designed exclusively for heating the house - it does not have a built-in water heater that provides residents with hot water. If you connect a boiler to it, it will heat water for various domestic needs.

The mechanism of dual-circuit units is more complex and their price is higher.

The main advantage of a gas boiler with a built-in storage tank is that you do not have to buy and install additionally. In addition, the water in it heats up much faster than in single-circuit boilers.

For devices with two circuits, you can connect a separate boiler so that there is more hot water. If you already have a single-circuit boiler, then in addition to it you can buy a special one, which is equipped with a fluid flow heater.

If you are the owner of an apartment that is small in size and you need to save space, then a single-circuit boiler with a built-in boiler will be the best option.

To avoid all sorts of problems that may arise due to incorrect installation of equipment, installation should be carried out by specialists.

Currently, you can find the following models of double-circuit boilers:

with a flowing water heat exchanger;
with a built-in boiler for 40-60 l;
with built-in boiler for 80-599 l.

The main characteristics of wall-mounted boilers with flowing water:

they can simultaneously heat rooms with a total area of up to 300 m²;
they are compact, you can mount them in a niche in the wall;
acceptable price;
differ in simple installation;
simple and convenient control.

Gas boiler device with built-in boiler

Advantages of gas heating boilers with a 40-60 l boiler:

they can heat an area up to 300 m² and simultaneously supply water to 4 draw-off points at once;
easy to manage;
have a self-diagnosis system.

Units with a boiler for 80-500 liters are of three types. The first two include devices that include all the necessary parts, they are compact and allow you to fully control the system. The third type includes boilers for which you need to install additional equipment and buy other parts. As a result, in order to purchase all the missing elements, you will have to spend a lot of money.

As already noted, most users prefer single-circuit gas boilers with separate boiler.

We note the main advantages of such devices:

The large internal section of the heat exchanger, due to which scale is formed much less.
Differ in reliability.
The mechanism and principle of operation of the device is simple.
Thermal energy is expended expediently, as a result of which the efficiency increases, and fuel is consumed more economically.
They are easy to service.
With a gas boiler and boiler, you are guaranteed to be provided with hot water at any time of the day.

Manufacturers

Today, the leading manufacturers of gas boilers with a built-in boiler are: Electrolux, Ariston, Viessmann, Baxi, De Dietrich, Vaillant, Wolf, Chaffoteaux, Biasi.

Manufacturer	Model	Characteristic
Electrolux	Electrolux GCB Magnum 28Fi	Gas wall-mounted boiler with a 60-liter boiler . Power: 28.70 kW. Efficiency: 92.4%. Voltage: 220 V. Combustion chamber: closed. Heat exchanger: separate. Dimensions (HxWxD): 900x600x460.
Ariston	Ariston Clas B Evo 24FF	Wall-mounted gas boiler with built-in boiler. Power: 24.00 kW. Efficiency: 92.0%. Voltage: 220 V. Combustion chamber: closed. Number of circuits: dual circuit (heating and hot water). Heat exchanger: separate.
Ariston	Ariston Clas B Evo 30 FF	Accumulative capacity: 8 liters. Power: 30.00 kW. Efficiency: 92.0%. Voltage: 220 V. Combustion chamber: closed. Number of circuits: double circuit. Heat exchanger: separate. Dimensions (HxWxD): 943x600x460
Viessmann	Viessmann Vitopend 100-W WHKB025	Power: 25.10 kW. Efficiency: 90.0%. Voltage: 220 V. Combustion chamber: open. Heat exchanger: separate. Dimensions (HxWxD): 725x450x360
Viessmann	Viessmann Vitopend 100-W WHKB026	Storage capacity: 4 liters. Power: 30.00 kW, efficiency: 90.0%. Voltage: 220 V. Combustion chamber: open. Number of circuits: double circuit (heating and hot water). Heat exchanger: separate. Dimensions (HxWxD): 725x450x360
Baxi	Baxi Nuvola-3 B40 280i	Designed for heating private houses, cottages, country houses, cottages up to 280 m², as well as for the organization of hot water. Features: boiler for 40 liters; separate heat exchangers; weather-dependent automation; LCD display; button control; brass hydrogroup; advanced functionality; programming.
De Dietrich	De Dietrich MS 24	Wall-mounted gas boiler with a storage capacity of 6 liters. Power: 24.00 kW. Efficiency: 91.0%. Voltage: 220 V. Combustion chamber: open. Number of circuits: single circuit. Heat exchanger: separate. Dimensions (HxWxD): 730x400x299

Thus, by purchasing a gas boiler with a built-in boiler, you can achieve significant cost savings without losing functionality and ease of use.