An indirect heating boiler: Get acquainted with the connection scheme. Connection diagram of the boiler of indirect heating to the gas boiler Electrical diagram of connecting an indirect boiler

For the device of the hot water system (DHW) exists several variantsOne of them are double-circuit and single-circuit boilers with a separate boiler.

If a in a two-circuit device A small heat exchanger is already built, heating water for DHW, then in a single-circuit system with a boiler, the task of heating the water for household needs is assigned to it.

Double-circuit boilers are usually equipped with relatively small capacity for DHWTherefore, they cannot provide the desired temperature for a variety of consumers for a long time.

Types of gas boilers with indirect heating boilers

there is two options Water heaters for DHW:

  • indirect heating (BKN);
  • direct heating.

BKN connects to the installed gas boiler. The heat exchanger is inside it (it can be a pipe shrew along the helix or a "tank" diagram).

Hot water from the heating system circulates on this heat exchanger, heating the water in the boiler. The latter is connected to the cold water supply network (HPW), and from the collapsible pipe is hot - comes to consumers.

Direct heating boiler can be compared with a conventional gas boiler Heating. It is also installed in it gas-burner And the tank with water. The burner heats the water in the tank regardless of the central heating system.

Important! When installing BKN, it is necessary to estimate the power to be spent on the DHW. If consumers have a lot and water often use boiler power may not be enoughfor heating, and indoors the temperature will be below the installed.

In this case, it is advisable to replace the boiler for more powerful, or use another type of water heater.

Boyler connection schemes for one-rope boiler

Exists three ways Connecting a boiler to the boiler.

Direct turning on the water heater in the heating system

In this embodiment, the BCN is included in the heating system, sequentially or in parallel with other radiators. The simplest and inefficient scheme is not recommended for use and given for reference.

Photo 1. Scheme of direct inclusion of the water heating gas single-circuit boiler to the heating system.

If the boiler temperature is installed below 60 ° CThis scheme becomes even less economical, and the water heats up for a very long time.

Increase temperature

The connection circuit is added three-way valve - a special device that switches the movement of the coolant when the temperature is reduced in the water heater tank on the DHW and vice versa.

Thus, if the water for the DHW cools, heating is temporarily disabled.

All the power of the boiler is redirected to the DHW.

The temperature on the device in this scheme is exhibited above ( usually 80-90 ° C).

And the heating temperature is regulated by a three-way valve.

Reference! The temperature of the boiler must be exhibited 5 ° C Above the required water in the DHW.

Using a thermostat in a water heater and automation

If a thermostar is installed in the BCN (a device that feeds when the set temperature is reached), and there is a boiler controller contacts for connection The thermostat of the boiler, then this scheme is the most preferred.

In this case, the boiler electronics is known about the water temperature in the DHW system, and it decides itself, where to send it power: To heat the water in BKN or heating.

Photo 2. Thermostat for the water heater in the heating system, you can find out the data on the water temperature.

Materials and tools

Materials:

  • Pipes, shut-off valves, check valves - Special requirements are not presented to them: use the same materials as for working with DHW or heating systems.
  • Expansion tank - The system of domestic water supply requires a separate, serves to prevent sharp pressure drops when opening / closing cranes.

Attention! The tank must be intended for use with hot waterusually similar devices are designated special marking.

  • Circulation pump - In the circuit of heat exchange with a water heater, a separate pump is installed.

In addition, in DHW systems with recycling, a separate pump is required to circulate water in the DHW circuit.

It will get rid of the need to wait for hot water along the pipes of a large length from the installation site of the water heater: the water will immediately be hot.

  • Wires and Small Electric Vent - If you plan to connect the thermostat of the water heater to the automation of the boiler.
  • Fastener - especially in the case of a wall installation, also for fastening pipes and pumps.
  • Standard plumbing set of sealants, seals, gaskets.

Tool:

  • gas key;
  • spanners different diameters;
  • adjustable wrench;
  • building level;
  • perforator, screwdriver, screwdriver;
  • minimum electrician set: Knife, plumbing, tape, phase tester.

You will also be interested:

Installation process: how to connect

Ideally, the boiler must be as possible closer to the heating boiler To minimize heat loss.

The supply of cold water is always carried out in the lower nozzle of the boiler, and the fence is hot - from the top.

  1. Choose the location of the water heater So, so that it does not interfere and was convenient to maintain. Mount the brackets, stands, fasten it on them.
  2. Connect to the HPS network: You make a removal, put a shut-up crane and a coarse filter.
  3. Through the tee, assign the line of the HPW to consumers, the second exit connect to the boiler through safety valve.
  4. Connect to the boiler DHW line in the house, not forgetting about the expansion tank on it. In addition, put the bypass cranes so that you can turn it off from the contour at service time.
  5. Now connect the boiler to the gas boiler on one of the shown schemes. Do not forget to turn off the boiler and block the system before connecting!
  6. Connect the electronics, sensors, pumps according to the instructions.

Running and checking

Many people having problems with central hot water supply in an apartment or house, decide to establish an indirect heating boiler. It is considered economical and convenient to use. But how is the connection of the boiler of indirect heating? There are several main methods that are suitable for both the apartment and a country house.

What is it?

An indirect heating boiler is a cubic or cylindrical capacitance, inside which the heat exchanger is installed, in most cases made in the form of a spiral coating. It passes the heat carrier from the heating system, with which water is heated in the tank. Such systems are well suited for small houses.

Water heater in most cases does not have its own heat source. It uses the energy of external heating. It may be central system or a separate boiler. Therefore, for each case, its own scheme for connecting the boiler of indirect heating is used.

Connection to heating

Such water heaters are mounted to the heating and water supply system. So that everything worked well, you need:

  • cold water to lead to the bottom of the unit;
  • provide hot-top exit.

In this case, the heating is supplied in such a way that the coolant moves down. It turns out that the hot stream comes along the top nozzle, and the cold leaves the bottom. It is at the expense of such a connection that will be able to achieve high efficiency.

Connection through a three-way valve

The basis of this type of connection is used two contours:

  • heating;
  • heating.

Due to the use of the three-way valve, a uniform distribution between the two lines is ensured. The main priority is at the water supply system, and only then heating.


In this case, you do not need to control the valve - everything works in automatic mode. For this, the thermostat is provided, which when cooled, switches the valve, and water from the heating system is supplied to the heater. When the temperature in the heater rises to the desired level, the direction of movement of the fluid is changed again, and it is fed to radiators.

In most cases, the installation of an indirect heating boiler is carried out in this way. The fact is that the system is simply indispensable in the case of using a large amount of water in the house.

Important! By installing the limits of the thermostat, it is necessary to take into account how much the liquid in the boiler will be heated. Therefore, on the machine it is recommended to put the temperature slightly lower than on the heating unit. Otherwise, the latter will have to work almost constantly on the water heater.

Using two pumps

Another good option is to install the check valve and two pumps. In this case, the management of each node is carried out by its own pressure setting. Connecting an indirect heating boiler to the boiler is carried out in parallel with other nodes, but it takes priority.

Circulation pumps are installed in front of the water heater and the heating system. For control, a thermal sensor is used, which sends the corresponding signals on the devices.

Such a system is considered very suitable for heating based on two boilers. In this case, one of them fully transmits energy into radiators, and the second has a yield and to the water heater.

In case of cooling fluid in the water heater, the coolant is sent for heating, and when the temperature rises to the desired mark - switches to heating. The check valve is used so that the coolant streams are not mixed with each other.

And there is no need to worry that it will affect the heating of the room. Water in such boilers is heated quickly - less than an hour. Therefore, the room simply does not have time to cool.

Connection with hydraulic arrow

Connecting a boiler to a double-circuit boiler using pumps is often carried out with the help of hydraulic. Typically, such schemes are embedded in multi-mounted systems.

Basically, this option is used if there are several heating segments. It can be a GWS boiler, radiators, warm floor and so on.


Here is adjusted hydraulic module and collector. This will allow you to remove possible pressure drops in different parts of the network.

Of course you can install balancing valves. But it requires special skills and experience. In addition, in the future there may be difficulties in use.

Return circulation

This scheme is implemented if the third input will be placed in the tank. It is to it that the recycling recycling is connected. The main purpose of this system is an increase in the feed rate of heated water. According to the idea, it must be applied instantly when the crane is opened. Thus there will be no fluid overruns at the moment when the drain occurs.

It turns out that a stolen highway is created, which constantly moves the stream. Management occurs with a circulation pump.

For proper work Installation of indirect heating boiler, and some additional components, including:

  1. Check valve. It is installed at the entrance to the water heater. This makes it possible to prevent the coolant from entering the cold pipeline while increasing pressure as a water overheating.
  2. Automatic air vent. It is located in front of the check valve. This item is necessary to prevent an excessive amount of air into the pump before its start.
  3. Safety valve. Protect the heater from pressure surges.
  4. Expansion tank. This component will maintain constant pressure, even when the cranes are blocked.

Important!In the expansion tank, the pressure should not exceed the indicators that are installed for the safety valve.

An indirect heating boiler is considered the most economical unit from the entire family of heaters. In this case, there are several options for connecting to different networks. It is only necessary to compare with already installed heating and choose the appropriate.

Indirect heating boiler is practical way Organizations of hot water supply in the presence of autonomous heating in a house or apartment. For heating, it uses the heating boiler resources or other heat source.

Design device

Corporate heating boilers are high cylindrical containers. They are performed from thin-sheet black or stainless steel, there are products with a tank made of polymeric materials. Capacity separated from ambient layer of heat insulating material. It closes an external plastic or metal case.

What do you need an indirect heating boiler

Choose a boiler in the volume of the inner tank

Water heating in the tank is carried out using a twisted heat exchanger tube located inside it in the middle. On the tube circulates prepared water or another heat carrier from the heating system.

What is inside a boiler indirect heating

The standard boiler of indirect heating has 4 fittings for connecting to communications. From top to bottom, they are located as follows:

  • having heated plumbing water;
  • heat exchanger input for the supply of heat carrier from the heating system;
  • refund of heat exchanger coolant into the system;
  • connection to a source of cold plumbing water.

The coolant, coolant in the heat exchanger, is descended. Plumbing water, heating in the housing, rises. Such a scheme complements the forced circulation of natural and increases the overall efficiency of the system. The bonus becomes an elevated water temperature at the exit from the tank, where it is most and needed.

Scheme of the boiler of indirect heating

Corporate heating boilers are offered in the form of 2 containers located in each other. The coolant circulates between their walls. This increases the area of \u200b\u200bheat exchange and water heating rate. This option is not very popular due to increasing cost.

Connecting an indirect heating boiler

The main protection of the container from galvanic corrosion is magnesium anode. Due to the low electrochemical magnesium potential, it is oxidized faster than steel elements of the device. Because of dissolution, the anode is subject to periodic replacement.

Connecting an ariston boiler and two gas boilers

Connecting a wall boiler

Steel walls are additionally protected by special types of internal coatings. Enamel, glass, china are used. Differences in thermal expansion of steel and coatings reduces protection efficiency. Over time, the coating cracks. When performing a tank of the boiler of indirect heating from stainless steel, welds are oxidized. The anti-corrosion properties of the material deteriorate when heated during the welding process. Boylers indirect heating with stainless steel tank also require the installation of magnesium anode.

Equipment of the device

Additionally, indirect heating boilers are supplied with a fitting in the middle part to connect a return in hot water supply systems with circulation. Circulation increases the comfort of use, allows you to connect a towel rail and saves water to the system. It is convenient to open the crane and immediately get a stream of the desired temperature. It is not necessary to drain the cooling water from the system between the heater and the mixer into the sewer.

The boiler of indirect heating at the entrance of the sanitary water should have a security group.

It consists of several mandatory devices:

  • shut-off crane;
  • check valve;
  • safety valve.

The locking crane is needed to temporarily disable the device from the system. The check valve does not allow water to drain from the tank when the water is disconnected, the safety prevents the destruction of the device. Its function is very important.

Liquids are incompressible, water heating causes its expansion. Cutting the water back to the system counteracts the return valve on the supply of water into the tank. In the absence of consumption, the increase in pressure could destroy the container. To counteract this phenomenon over the water mirror in the container, a small amount of air remains. Its compression compensates for increasing pressure. But after an excess of the stipulated threshold, a safety valve should be activated, blending excess water.

Safety valves are equipped with nozzles for connecting to sewage. The nozzle design allows you to exercise visual control valve operation (visible gap). An indirect heating boiler of American production more often has a separate threaded hole directly on the housing for installing the safety valve.

Additionally, pressure regulator, pressure gauge, coarse filter, water drain faucet can be provided. To automate work on the boiler housing, places place space for setting temperature sensors.

Summer exploitation

The combined boiler of indirect heating can be equipped with its own age for use in the summer, when the exploitation of the heating boiler is inexpedient. Such a supplement turns an indirect heating boiler into a cumulative electric heater. Due to the similarity of the designs of the devices, this modification does not greatly affect the cost and is included in the package of so many models. With a small summer difference in the temperatures of the incoming and outgoing water, its heating by a two-power 2,3 kW is quite possible for large-volume tanks.

To save connect a successively solar collector

The combined heater may have another design (with a separate heat exchanger for connecting to an alternative heat source). They are connected to solar collectors or thermal pumps. The combined option is possible and without a separate heat exchanger. It is not difficult to assemble pipelines, where the transition to circulation from another source of heat would be carried out by switching of shut-off valves.

Device connection options

The contour of the boiler of indirect heating is always parallel with the heating system. The insertion is performed in the immediate vicinity of the boiler. For electronic system Control of the control of the heater priority relative to the heating system. You can choose the connection of the boiler of indirect heating by one of the 3 main options:

  • with a 3-way crane;
  • with 2 circulation pumps;
  • with hydraulic arrow.

In the first case, the diagram of connecting the boiler of indirect heating includes a 3-chassis controlled by electronics. It is installed on a branch from the main line to the contour of the boiler of indirect heating. At a temperature in the tank below the given, the faucet switches to circulation through the heat exchanger. Upon reaching the desired temperature, switching to the circulation through the heating circuit. In this case, the current of the coolant over the system corresponds to the overall boiler pump.

IN aryanta Connecting floor boilers in cottages

According to the second embodiment, the contours of the boiler of indirect heating and the heating system have separate pumps. They turn on alternately depending on the temperature in the tank. Passing the fluid during the non-working contour pump prevents the installation in each of them the check valve.

The binding of an indirect heating boiler with a hydraulic area provides for connecting multiple contours to the total area of \u200b\u200bthe pipeline relative to big diameter. Circulation of the coolant from the boiler through the hydraulic system provides a permanent temperature gradient. Closer to the feed, where the temperature is maximum, the boiler of indirect heating is connected, then the contours of the radiators are followed, then the warm floors.

With any diagram, switching to circulation through the heating system should occur at a temperature that is lower than the maximum value for the boiler. Otherwise, the batteries will always remain cold.

How to connect an indirect heating boiler. Video

Not in all cases in the house immediately turns out the connection of the necessary communications. In most cases, the HBS is performed at the end of the repair or in the period when the cold season is approaching. As a rule, a boiler is often installed for this system. But as you know, with constant operation, this device consumes a large number of Electricity. And to make water heating more economical, we suggest you to deal with how to connect it to the heating system. This will allow the water heater, during the heating, spend thermal energy Heating and only in summer to warm the water with Tanni. Compare various techniques.

Connect to two-door boiler

In order to enter the water heater, the heated water from the two-circuit heating system is mounted three-way crane. It shifts the receipt of the coolant with batteries to the coins of the water supply chain. With such a scheme, it is important to ensure that the signal is carried out on the three-way valve. Also, you do not need to install a recycling pump on the serpent. The main work is carried out by a heating system that contains this device in its configuration. The recycling pump is necessary only if the system provides thermostat. As a result, when connecting a water heater to a two-kinning heating system, you can select equipment based on the needs.

To increase the hydraulic circulation power of the heating system, a recycling pump is mounted. Due to this, you can control / setting up thermal inertia, i.e. Hydraulic friction of heating.

There are boilers with a built-in boiler both wall mounted and outdoor. Such equipment is more expensive, plus you can completely get rid of extra fittings. But on the other hand, the floor has built-in water heaters with a volume of up to 100 liters. This imposes explicit limitations. Moreover, such samples are in the area of \u200b\u200b60 thousand rubles. If we compare with the price of the water heater, then there is a significant difference that varies within 4.5 thousand rubles. Given it is much more profitable to buy a device.

Compare several options for connecting an indirect heating water heater:

  • Using a three-way valve.
  • Using the hydraulic arrow.
  • The method of revival circulation.

Based on this method, there are 2 contours: heating from a boiler and heating. The three-way valve will distribute warm water between them. Automation (thermostat) is used to control the valve. As soon as the water temperature in the heater circuit reaches a given mark, the automation gives a signal to a three-way valve. After that, warm water enters the batteries. This method is considered the most popular.

If you set the limit temperature, it is important to provide for what extent the boiler warms water. Accordingly, the temperature in the water heater circuit should be set lower than in the connected device. Otherwise, the coolant will be constantly directed to the water heater.

Pumps will guide warm water into different contours, i.e. Connecting the water heater occurs in parallel. Each highway is equipped with a pump whose work is controlled by a thermal sensor.

Check valve is embedded in the system after each pump. This will prevent the conflict between two branches.

When the DHW turns on, heating temporarily stops working. Given the fact that water is heated in a water heater in a short period of time, hot water in radiators has not been reached critical temperature. If 2 boilers are used, then heated DHW and the operation of heating will be uninterrupted.

When using circulating pumps, it is important that the streams are equal. To do this, you can use the hydraulic arrow and hydraulic distributors. This is especially effective if it is necessary that the heated heat carrier is sent to outdoor heating, boiler and radiators. To level the pressure difference in contours, parallel effect of the hydraulic module with a hydrocollector. Although they can not be used by setting balancing cranes. But in this case, the installation and adjustment of the system without the help of a specialist will be difficult.

This connection technique is possible only if there is a third input in the boiler. It will be possible to connect the coolant recycling. Due to this, the water heating process can be very fast. As a result, you get rid of the problem of draining cold water from the crane until it goes hot. This is a significant savings.

As a result, a stacked highway will be formed, which will constantly circulate water. You will also need to connect the following items:

  1. Expansion tank. With closed cranes in a hot pipeline, stable pressure will be maintained.
  2. Safety valve. It will protect the water heater from pressure surges.
  3. Automatic air vent in front of the check valve. This will fully avoid the pumping of the pump before it is directly launched.
  4. Check valve. If in the system high pressure And as a result, the water overheats, a hot heat carrier will not fall into the pipeline with cold water. It is installed at the entrance to the water heater.

The maximum pressure that is allowed in the expansion tank is not allowed above the given pressure in the safety valve.

So, we reviewed the basic options for connecting the water heater of indirect heating. We highlight the pros and cons of this method:

Advantages:

  • You can simultaneously use several heating devices.
  • The possibility of recirculation.
  • DHW and heating streams are separated.
  • High performance.
  • The electrical network is significantly unloaded during the heating.
  • The inner surface of the water heater on has contact with running water.

Disadvantages:

  • More costs are required to re-equip the heating system.
  • The first heating of water is carried out more than one hour.
  • It is necessary to have a separate room in which all equipment can be positioned.

In this case, a diagram is used where 2 pumps are mounted. This will allow you to completely get rid of the use of a three-way crane. Above already described a similar system, where the contours are in parallel. Once the thermostat is given a signal, the pumps leading to the Baku are included. It is also necessary to install a check valve that does not allow mixing the coolant.

With such a connection of the water heater, the return circulation method also applies. In this case, the coolant continuously circulates under the influence of the pump. Due to this, the heated water enters the crane faster.

In this case, it is allowed to simultaneously have a system that will allow you to discharge the coolant in an emergency and the possibility of accessing the DHW. Often, thermostatic cranes are mounted on batteries, but remember the risk of overheating. If the water heater is installed, then there is no such problem, because Surplus warm water will be directed to the tank. But remember that such a boiler connection is possible with natural circulation.

So, the following security group is necessarily mounted:

  • Shut-off crane.
  • Drain crane.
  • Cutch and reverse valve.
  • Pump on the water heater.
  • Valve for feeding.
  • Water heater security group.
  • Expansion tank.

Under exercise mounting work It is important to avoid any errors. This can lead to unpleasant consequences. For example, it is important not only to take care of the close location of the water heater to the boiler, but also to set the right direction of the pipes to the pipeline for a lightweight installation. Another common error is an incorrect connection of the pressure pipe and the input of the coolant. Cold water is always fed to the bottom nozzle, and the hot water heater is hot. There is also a risk of incorrect pump connection. It is important to comply with the parameters set forth by the manufacturer.

So, we looked with you possible methods Connecting the water heater to the heating system. We hope this information will be useful for you and will help accomplish this task yourself. To help also provide schemes and video.

Video

The principle of operation of the boiler of indirect heating is shown in the video material:

Hot water supply is one of those things that makes it possible. comfortable accommodation in the House. There are many ways and systems that provide hot water in required quantity. A good option is to connect the boiler of indirect heating, which will be discussed in this article.

Device and principle of boiler

The boiler of an indirect exchange (water heater) is a water-filled tank, in which the heat exchanger is located. As a heat exchanger, a coil or a water jacket is usually used. The heat exchanger is connected to a heat source transmitting energy by means of a coolant.

The water heating process in the boiler occurs as follows:

  • First, the heat exchanger is served coolant from the heating boiler;
  • The heat exchanger walls are heated due to the supplied energy;
  • From the walls heat is given to water, which is in the tank;
  • Preheat water is closed by consumers as needed.

There is an intermediate link between water and the heat carrier with such a technology - therefore the device is called an indirect heating boiler.

The heating system with an indirect heating boiler is closely interacting. Thus, the water in the boiler usually has a slightly smaller temperature compared to the temperature of the coolant entering the heat exchanger - that is, heat the water in the tank only to the level that the boiler can be issued.


However, one method of circumventing this restriction is - just needed that choose a combined boiler in which, in addition to the heat exchanger, there is also a TEN. In such devices, the main source of heat is indirect heating, and the TEN increases the temperature of the water to the desired level. The most efficient combination of equipment in which water remains hot longer - a boiler with a tree and a solid fuel boiler.

Some boilers are equipped with additional heat exchangers - with a large volume of the tank, this will significantly speed up water heating. In order for water as long as possible in the heated state, when the equipment is selected, it is worth a preference to devices with insulation.

Compatibility with heating equipment

Boylers indirect heating without problems work with any heating system that provides hot water supply - if only its power was sufficient. As already noted above, a different option is solid fuel boilers operating on all available fuels. However, devices operating on gas, electricity or liquid fuel will also be fairly effective.

The installation itself is not very complicated, but no simpleness is different. When choosing a model with the availability of special problems, there will be no special problems, but with simplified products will have to be tinted so that the boiler can work in a bundle with them with heating and water supply.

Types of indirect heating boilers

The classification of water heaters of the type under consideration is carried out on one main feature - the presence or absence of built-in management:

  1. Integrated Boilers. Such devices are connected to heating systemswhich use boilers not equipped with automatic. Such boilers have a temperature sensor and its own automation unit, which adjusts the flow of heated water into the heat exchanger. The binding of the boiler of indirect heating with the built-in control is simply carried out - it is enough just to bring it to it pipe feed and reversal from the boiler, to ensure the supply of cold water and connect the output channel, which allows to distribute water to consumers.
  2. Boilers without built-in control. Usually, this category Boilers usually runs in a bundle with automated boilers. The binding of the boiler of this type begins with the installation of the temperature sensor and its connection with the appropriate input of the boiler. The burden of the boiler is carried out on one of the existing schemes. If necessary, such devices are connected to non-volatile boilers, but in this case you need to use the corresponding strapping schemes.

Also, boilers are divided into species depending on the form and installation method. As for the latter, there are two types of devices - wall-mounted (no more than 200 liters) and outdoor (volume up to 1500 liters). Both options may have a horizontal and vertical format. Wall boilers are attached to the brackets fixed on the dowels.

The overwhelming majority of water heaters have a cylindrical shape, and their outlet nozzles are located on the back - it significantly simplifies the connection of the boiler of indirect heating and does not spoil the decorative design qualities. On the outside of the panel there is a place to install a temperature sensor or relay, and in separate models the possibility of connecting the BETA is implemented.

Connection Schemes and Features

The connection of the indirence can be carried out in two concept schemes:

  • In the first circuit, the water supply circuit will be priority for the system;
  • In the second scheme, water heating is carried out in accordance with the working regime of heating equipment.

The first scheme of the heating system with an indirect heating boiler sends the entire volume of the coolant for the heating of the tank, due to which the very quick heating of water is ensured. When the water temperature reaches a given mark, the coolant is redirected to the heating circuit.

The second scheme of the strapping of the boiler of indirect heating does not make differences between heating and water supply, so only a certain part of the coolant is given to the latter. Accordingly, the drawdown of heat transfer radiators is not observed, but the water in the boiler heats up much slower than in the previous case.


By installing an indirect type water heater, preference will better give the first diagram - it provides uninterrupted hot water supply in the required volume. The effectiveness of heating in this case will practically do not deteriorate - to maintain the temperature regime, the coolant is removed from the heating circuit for about 5 minutes, and for the total heating of the entire tank, it will take about half an hour.

Of course, the specified numbers are very approximate - the heating rate directly depends on the power of the boiler and the volume of the tank. One thing can be said for sure - if the power of the heating equipment exceeds the required level of at least a quarter, then very little time will be required to heat the water, and these costs will not affect the efficiency of heating. In any case, before connecting the tank of indirect heating to the boiler, you need to think over all aspects and calculate the effectiveness of the future system.

Rules of strapping boilers

There are a number of general rules that must be respected when installing indirect heating boilers:

  1. So that all devices connected to the distribution of hot water can function normally, an expansion tank is supplied to the output channel of the boiler, the volume of which is 10% of the total tank. The installed tank will allow you to compensate for the temperature expansion in the plumbing system.
  2. Each branch system should be equipped with a ball valve, which will allow you to disable any device if necessary, without turning off the entire water supply circuit.
  3. Power pipes are strongly recommended to equip check valves. These elements prevent the water current back into the boiler and thereby provide its safe use.

Connecting a boiler to a boiler with forced fluid circulation

If the circulation pump is installed on the system, and there is a place to install a boiler near the boiler, then the best option There will be an organization of a separate contour coming from the heating boiler. As a rule, such a heating circuit with an indirect heating boiler is used for wall-mounted boilers - in this case, a parallel connection of the water heater and the heating circuit is obtained.

The circulation pump needs to install a three-way valve for a boiler of indirect heating, to which the temperature sensor installed on the tank is supplied. The yield of the three-way crane is connected to the boiler nozzle so that the contour with heating can be connected. A tee is crashed into the pier of the breaker to enter the boiler, designed to fence water from the heat exchanger.


The workflow with such a scheme is as follows:

  • When the three-way crane receives data on the decrease in water temperature below the required level, the entire coolant is redirected to the boiler;
  • Water in the boiler is heated due to the coolant in it;
  • When the water temperature reaches a given top mark, the three-way valve switches again, and the coolant arrives again into the heating system.

Scheme with two circulating pumps

If the system is already equipped with a circulating pump, then the boiler's strap circuit can include another pump that will be located on the pipeline on which the tank is located. The location of the pump relative to the boiler itself does not matter - it can be installed both on the submission and on the return.


There is no three-way crane in this scheme - the connection of the boiler of indirect heating is carried out by means of tees. To adjust the supply of heat carrier to the boiler, pumps are used, the activity of which is controlled by the temperature sensor - at a low temperature, the circulation pump for the boiler of indirect heating is started, and after heating, the second pump begins to operate, providing the circulation of the fluid in the heating system.

Connecting a boiler to the non-volatile boiler

When used with non-volatile heating equipment The boiler needs to provide a priority flow of the coolant. Most. simple wayallowing to achieve this goal is to install the tank above the level of radiators - that is why in such situations are commonly used wall-mounted models. The optimal location of the wall boiler suggests that its lower part is located at least slightly higher than the level of the boiler and heating devices.

Of course, with outdoor devices, such a water heater strapping can also work, but water heating will be slow and defective. At the bottom of the tank, water will not be able to warm to the end (its temperature will be on the same level with a fluid temperature in the return pipe), so the total hot water will be reduced.


Circulation of the coolant in non-volatile systems is carried out naturally. To increase the efficiency of the system, it is possible to cut into it the circulation pump, and if there is electricity, water will constantly warm. If you wish, you can do without a pump - for normal supply of the coolant to the water heater of the supply pipe to it should have an increased diameter in comparison with the pipes of the heating circuit.

On the section of the heating pipeline for the branch sets thermostatic headSupplied by a sensor. This thermostat allows you to configure the desired temperature mode. The coolant supply is regulated by a thermostat that opens and closes depending on the temperature of the water in the tank.

Scheme with recycling coolant

If there is additional consumers in the system (for example, a towel drying devices) need to be equipped so that they all get hot water. For this, the recycling loop is used, in which the water is constantly driven through the entire contour of the pump. The binding of the boiler of indirect heating with recycling has an important dignity, which is that brewing water constantly flows from the crane, and the time on the flowing cold is not spent.


The disadvantage is that when recycling coolant, water heating costs in the boiler are increasing. The thing is that the liquid is constantly circulating over the ring and cooled, so the boiler spends much more resources on its constant heating. In addition, the decrease in temperature is enhanced by mixing different layers of fluid.

The arrangement of the recirculation system can be performed in several ways. The easiest of them consists in choosing a water heater having a built-in recycling contour, implemented in the form of additional pipes. Of course, the boiler of indirect heating with recycling cost an order of magnitude more expensive than ordinary models. Another option is to combine all consumers into one contour by tees.

Conclusion

The blockage of a single-circuit boiler with an indirect heating boiler is performed by different schemesEach of which allows you to solve a certain number of tasks. So that hot water supply worked high quality and without interruptions, you need to think about it in advance constructive features and nuances that can occur during the work.


Did you like the article? Share it
Print article
Top