Gas boiler piping diagram - solid fuel boiler. How to piping a solid fuel boiler

Heating equipment is designed to make life easier and make living in the house comfortable. Why carry firewood and buy coal? It is much more convenient to connect a gas boiler to a common line. It can be mounted either wall or floor method. But how to properly organize heating so that the coolant is distributed evenly throughout the system? How can you save on fuel consumption? Wiring diagrams will help you gas boiler.

What does the harness include?

How does the system usually work? It is based on a heating boiler, from which the coolant is distributed through pipes and radiators. Trimming is an installation scheme that protects against overheating and guarantees efficient operation. It includes elements that are located between the radiators and the boiler:

• Pipes, divided into two circuits: supply and return lines.
• Shut-off valves, fittings.
• Expansion tank. Its volume is equal to 10% of the total amount of coolant in the system. When heated, water expands and pressure increases. To ensure that the value does not exceed the critical level, excess liquid is taken into a membrane tank. After cooling, the water returns to the circuit again.
• Safety valve. Has the same function as the expansion tank. Discharges excess water into the sewer, preventing an explosion when pressure increases.
• Air vent. Air pockets interfere with coolant circulation. The air vent automatically bleeds air from the system.
• Pressure gauge- a device for measuring and monitoring pressure.
• Circulation pump. Responsible for the forced movement of liquid through pipes. The pressure and productivity depend on its power.
• Hydroarrow- these are pipes that are combined into a common container. With a hydraulic arrow, you can connect several circuits at the same time, avoiding their influence on each other.
• Coarse filter. Fine mesh detail. Detains debris that comes from tap water(sand, rust).

Automation is installed to control the operation of gas and electric boilers. This is a set of sensors for ionization, draft, ignition, temperature. Each of them controls the operation of a separate node.

The more complex the piping scheme, the more the efficiency of a boiler for a private house or apartment increases.

Strapping schemes

To understand how to make the connection correctly, pay attention to the type of boiler. The connection of a single-circuit and double-circuit unit will be different. The simplest piping does not include a pump. The design uses only shut-off valves and a filter. This is a financially economical approach, but it does not ensure uniform distribution of the coolant.

It’s easier to make the connection with polypropylene with your own hands. Pipes made from this material are inexpensive and easy to install. In addition, plaque and scale do not accumulate on their walls. You can assemble a circuit of any shape; the connections are made using an “American” fit. Paronite is used as gaskets.

Single-pipe (simple) circuit

The instructions are suitable for single-circuit boilers “”, “”, “” and other brands. The design provides for one pipe, which extends from the body along the floor level. The batteries are connected in series, which reduces the heating efficiency (especially since the combination does not turn on the pump).

Advantages of installation with natural circulation:

• Easy installation.
• Independence of heating from the availability of electricity (the pump requires a connection to the network to operate).
• Minimum costs for materials and equipment.

The picture below shows the connection already with a pump and forced circulation.

Two-pipe installation

How to tie a double-circuit boiler? It includes a supply line that goes up (riser) and turns at the ceiling. This is the main pipe, from which a fork diverges separately to each radiator. The outlet pipe is located at the floor line. Each battery is connected to it by a pipe. It is this organization that allows the coolant to be evenly distributed, which means that the room can be heated effectively.

IN one-story houses You can install a heating system with natural circulation. But in multi-storey buildings only the option with a pump is used. What you will need during installation:

• pump (usually included with the boiler);
• distribution valve;
• membrane tank;
• shut-off valves;
• filters;
• check valve;
• adapters, tee.

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Purpose any heating system is to create a comfortable environment in the home. A favorable microclimate cannot be achieved if the heating boiler is connected incorrectly. Piping diagrams for gas heating boilers help connect this device to the water supply system and distribution networks, according to established rules And technical requirements.

What does boiler piping mean?

If a person has never before encountered the need to arrange a heating system, he is not familiar with the term “piping”. This concept means the use of a specific installation scheme that will protect the equipment from possible overheating.

According to experts, correctly installed piping of a gas heating boiler or an appliance operating on a different type of fuel allows the heating system to operate more economically and efficiently.

Heating boiler piping elements

Knowing what elements a gas heating boiler piping diagram contains will help you connect heating equipment to the system without any problems:

1. Heating boiler. It is one of the main components of the heating structure; its choice largely determines the method of connection and. The heating boiler must not be placed at the top of the pipeline distribution. The heating circuit rod must be capable of venting air. To avoid having air jams If the boiler does not have an air vent, the pipe should be positioned vertically.
2. Pipes. This element has gas wall and electrical devices, intended for heating the coolant liquid (read also: " "). The presence of pipes means that the boiler is equipped with an automatic air vent.
3. Expansion tank. This membrane element are used when piping a wall-mounted gas boiler, as well as a floor heating device. Thanks to its presence, the heating generator is reliably protected from water hammer. The expansion tank consists of two cavities that are separated by a special membrane.This design controls possible pressure drops in the heating boiler. The device functions as follows: the coolant moves through one of the cavities, and at the same time the other cavity is filled with air.
4. Heating radiators. These devices provide heat exchange between the air in the room and the coolant liquid (read also: " ").

Features of gas boiler piping

There are several ways to tie a gas boiler. The most popular option is . Working with pipes made of this material is low cost and simple. Plaque and solid particles do not collect on the walls of polypropylene products. When such pipes are used, piping a gas boiler with your own hands is not difficult; any property owner can handle such work.

Piping of boilers, including double-circuit models, is carried out by soldering. This method allows you to avoid leaks during operation, unlike the use of fittings, when, if they are not fastened accurately, there are places through which leaks occur. coolant liquid(read also: " ").

The polypropylene pipeline allows you to create a contour of any shape. Welding of this material is carried out in different ways, the main thing is to avoid large number pipe connections that must be made smooth and uniform. An exception concerns the location of the gas supply to the heating boiler. The connection is made by using a hard threaded connection, called “American” (sgon).

Paronite serves as a gasket. It is prohibited to use tow, fum tape or components made of rubber. The fact is that rubber gaskets under the influence of high temperatures can narrow and, as a result, practically block the passage in the pipeline, and tow is easily flammable.

Tied up polypropylene pipes a pipeline, such as the one in the photo, can withstand pressures of up to 25 bar; high temperatures reaching 95 degrees Celsius are also not dangerous for it.

Connecting double-circuit gas boilers

A double-circuit boiler, unlike a single-circuit heating device, has a universal purpose. Such a unit for domestic needs heats water and at the same time maintains the necessary temperature regime V .

The peculiarity of double-circuit boilers is that during consumption hot water not happening parallel work both circuits. This means that the piping of a wall-mounted double-circuit gas boiler does not depend on the type of heating and is always the same. Due to the large size of the pipes, radiators and coolant take quite a long time to cool.

There is one more feature: if you are piping a double-circuit gas boiler, then you cannot use natural circulation of water. Many models are equipped with a special pump, because without it, after the generator stops heating, the movement of the coolant stops and the installation begins to reheat, which takes much longer and, as a result, the radiators begin to unevenly heat the room (read: "").

Gas boiler wiring diagrams

If the gas boiler is piped in the classical way, the coolant moves up the supply pipeline. Then the water is directed to risers, which have special devices that do not allow them to be opened.

The heating level is regulated by radiators equipped with a throttle and jumpers (read also: " "). It is mandatory to install a shut-off valve on the second supply line, and an air vent is placed in the upper part of the expansion tank. The coolant returns to the boiler along the lower supply line.

When the piping of a double-circuit gas boiler is carried out by the house owner himself, you need to prepare the following tools and components for the work:

Forced-type devices are easy to operate and are considered more comfortable to use.

The heating unit is controlled automatically. Among the advantages it should be noted that for separate rooms You can set a certain temperature thanks to the presence of sensors that control the heating process.

At the same time, the piping scheme of a wall-mounted gas boiler has negative aspects, including:

• high price for components;
• the difficulty of implementing the strapping, which can only be done by a professional;
• the need for constant balancing of parts;
• high cost of service.

If the house has a complex heating system, for example, there is a “warm floor” and radiators, then you may notice some inconsistency in the movement of the coolant. Therefore, to solve the problem, a hydraulic decoupling is included in the piping circuit, forming several circuits for the movement of coolants - a common circuit and a boiler circuit.

To waterproof each circuit, an additional heat exchanger is installed. This will be required to combine open and closed systems. Installations belonging to the separate type must be equipped with circular pumps, a safety system and taps (drain and feed).

How to connect a gas boiler, see details in the video:

Wiring diagrams for wall-mounted boilers

The piping of a floor-standing gas boiler and other types of heating devices can be simplified if you use primary-secondary rings. There will be fewer all kinds of devices designed to control the operation of the system if you make several rings of the heating system and install its own circulation pump for each of them. Thanks to such measures, a uniform supply of hot coolant to the end consumer is ensured.

The wiring diagram for a dual-circuit device is complex. A reasonable solution is to contact a specialized gas organization. Its employees will quickly connect the equipment to the gas supply system.

A heating boiler is a device in which fuel is burned and a coolant liquid is heated. Heat still needs to be supplied to the water circuits of radiators, heated floors, boilers, etc. Here you definitely need a piping diagram for the gas heating boiler - everything that connects it to the appliances in the premises.

Purpose of the strapping

1. Maintenance stable pressure coolant in the system.
2. Removing air from a liquid that interferes with its circulation. When an air lock forms, the passage of water through this place stops. Air vents are installed in the correct configuration.
3. Cleaning the coolant from contaminants. Mechanical impurities impair the performance of equipment. In this regard, it is necessary to install filters for cleaning.
4. Compensation for thermal expansion of liquid. To prevent the liquid from destroying the system due to excess pressure, a tank is installed to compensate for expansion.
5. Connecting one or more circuits to the system.
6. Accumulation of hot water with a connected boiler.

The simplest circuit with one circuit

The most simple circuit The piping of the gas heating boiler is compiled in accordance with its characteristics and requirements.

The piping also includes connecting the gas supply to the burner.

Gas heating boiler wiring: diagram, photo

The simplest single circuit system is designed according to its characteristics and requirements. A check valve and a ball valve are installed on the supply side.

A pump is installed on the return or discharge pipe to create liquid circulation, ensuring uniform distribution of the coolant throughout the rooms. Before it connects strainer, located down the sump. Before the liquid enters the boiler, it is advisable to install a fine filter.

A closed expansion tank is installed closer to the boiler. It contains a membrane that allows you to relieve excess pressure during thermal expansion of the liquid.

After the pump, the coolant flows through the circuit to the radiators. More modern is the decoupling through a collector - a special water collector from which liquid is distributed through several circuits. It is placed in a separate cabinet, from which the coolant is distributed through pipelines.

The wiring diagram for a gas heating boiler contains safety valve. When the coolant boils due to overheating, the expansion tank may not be able to cope with the pressure surge. The consequences may be as follows:

• pipeline ruptures and connection leaks;
• destruction of fittings and pipes;
• explosion of the boiler tank.

Install as close to the boiler as possible, because pressure begins to build in it.

On some units, safety groups are installed, consisting of a relief valve and a pressure gauge. The devices are mounted directly into the water jacket of the boiler, but can also be installed on pipelines. On gas and electric boilers these devices can be replaced with others, where upon reaching critical temperature burner fluids or electric heaters are switched off.

There are many options for equipment for boilers, but the basis of the classification is the division into natural and forced circulation.

Natural circulation

The principle of operation is based on reducing the specific gravity of water when heated. The hot liquid is forced upward by the cold liquid, passes through the heating devices, gives off some of the heat and returns to the boiler for heating.

Installation of inlet and outlet pipes is carried out with a slope of at least 3 0 so that natural circulation occurs and less air accumulates in the system.

With natural circulation, the piping of a gas heating boiler (diagram below) is done so that the radiators are located above the supply pipeline.

The return line goes from above also with a slope. At correct installation and the choice of pipe diameters, natural circulation is almost as powerful as forced circulation.

Advantages of the method:

• simplicity of the system;
• ease of installation;
• quiet operation;
• durability.

The system is suitable for heating not big house with a total area of ​​premises not exceeding 100 m2. Disadvantages include the length of time it takes to warm up rooms and the inability to regulate temperature in individual rooms.

The gravity circuit is used mostly in small houses and country houses, with only one heating circuit. Numerous pipes spoil the interior if they are not hidden in the walls.

Forced circulation

The method has become most widespread, since the pump intensively pumps coolant through the system and heating efficiency increases by 30%.

Advantages also include the ability to regulate temperature and low pipe consumption during installation. The system will still cost significantly more, since it is more complex and requires more devices. Installed elements require balancing, and the entire system requires regular maintenance. In addition, a source of electricity is required.

If you install combined system, it will combine the advantages of both previous ones. It can be switched to any mode using a bypass installed with the pump. In this case, the heating operation will not depend on the supply of electricity to the house.

Polypropylene strapping

Plastic pipes have replaced metal pipes everywhere, including for water pipes. For heating, multilayer reinforced products are used that can withstand high pressure. Thanks to soldering connections, a monolithic piping of a gas heating boiler with polypropylene is obtained. Schemes are created of any complexity and in a short time.

Important! The simpler it is, the more reliable it is, and the higher the performance.

Unlike the coolant, gas is connected to the boiler through metal pipe c The seal is tight and does not burn.

Piping of a floor-standing gas heating boiler: diagram

The dimensions of a conventional floor-standing boiler are small, but installation together with the piping requires a lot of space. All equipment, including a circulation pump, elbows, bushings, manifold, taps and instruments, is difficult to place compactly.

Most models are single-circuit, and hot water requires a boiler with all connections.

The hot water supply system requires a separate pump (if there is no central water supply), and a thermostatic mixer.

Gas must be connected to the boiler correctly. For this purpose it is ordered project documentation, which is compiled by specialists. Entering the house gas pipe is carried out in the presence of a shutdown device in the event of an emergency. Gas is connected by special services that use special pipes, hoses and other equipment.

Installation of a wall-mounted boiler

Boilers can be hung on the wall even in the kitchen. They take up little space. The wiring for a wall-mounted gas heating boiler (diagram below) is included in the kit and can even be built into the boiler. Compact arrangement of equipment required less space, But similar models more difficult to maintain.

The disadvantage of wall-mounted boilers is their low power. In addition, the devices do not operate without electricity, and natural coolant circulation is rarely used for them. On the other hand, almost all boilers are already equipped with electronics and require electricity. In places with unstable supply, you can install an uninterruptible power supply.

In the majority wall models piping is provided for a double-circuit gas heating boiler, the circuit of which allows you to supply the house hot water.

The disadvantage of the dual-circuit option is that the heating is turned off during hot water consumption. This is especially noticeable when the boiler power is low. If there is enough of it, the temperature of the coolant drops by only a few degrees in a couple of hours. This applies to houses with high-quality thermal insulation and sufficient quantity radiators with thermal inertia.

Conclusion

The piping diagram for a gas heating boiler is drawn up in accordance with its characteristics and requirements. For a dacha, a natural circulation system through one circuit is suitable, and for a large house - with a forced and multi-circuit one.

In order to ensure effective heating of homes, it is necessary to piping a gas boiler for heating a private home as competently as possible. It consists of several elements arranged in a certain sequence.

Types of connection

Autonomous heating can be implemented using:

1. Wall-mounted single-circuit boiler with electronic ignition, providing forced circulation in the radiator system.
2. Non-volatile wall or any floor equipment.
3. A non-volatile boiler installed in an open circuit with natural circulation.
4. Heating circuit modifications for heated floors. It is not typical here heat coolant.
5. A single-circuit boiler connected to a hot water supply system. We are talking about a wiring diagram for a gas heating boiler with a boiler
6. Double-circuit boiler providing heating and hot water supply. In this way, a double-circuit gas boiler with a boiler is connected, which is quite popular.
7. When the DHW circuit has water recirculation. Thanks to the constant movement of water in the circuit, heated towel rails connected to the hot water supply are kept hot. It also ensures high-speed hot water supply to the mixers.

If a hot water supply of considerable length does not have water recirculation, it will require prolonged draining before heating. In addition to the known inconveniences, this also entails financial losses. The same applies to dead-end DHW distribution without recirculation. In this case, heating of heated towel rails connected to the wiring occurs exclusively during water intake.

Harness complete set

The harness includes the following elements:

• Diaphragm expansion tank. Designed to compensate for surges in coolant volume during heating. This need arises in closed heating systems. Inside the container there is an elastic membrane that divides it in half. One half contains air or nitrogen (in this case, the walls of the tank do not corrode). When the volume of coolant increases, this provokes compression of the gas: as a result, the total pressure in the system remains almost at the same level. The standard volume of the expansion tank is 10% of the amount of coolant. For a rough calculation, a ratio of 15 l/kilowatt of heating boiler power is usually used.
• Safety valve. Resets excess coolant when the pressure in the circuit rises to dangerous levels. As a result, pipes and radiators are protected from rupture. A drainage pipe is provided to drain water into the sewer. If this valve operates regularly, this indicates insufficient capacity of the expansion tank.

• Air vent. If air pockets occur, they are removed automatically. We are talking about air accumulations formed in the system as a result of draining the coolant. Because of them, hydraulic noise arises and additional obstacles to normal circulation in the mode of low hydraulic pressure.
• Pressure gauge. Controls working pressure in the circuit. It is sometimes replaced with a thermomanometer, which additionally records the temperature. The scale of the device must have a marking of up to 4 atmospheres.
• Open expansion tank. Replaces the expansion tank, air vent and safety valve in an open circuit. In this case, the system does not face the problem of excess pressure. A tap is used to connect a tank communicating with the atmosphere to the DHW system: this ensures recharge of the circuit.
• Boiler indirect heating . Inside this heat-insulated container with a heat exchanger, hot water is prepared. Heat is supplied by means of coolant flowing through the heat exchanger from the heating system. This element is included in the piping diagram of a gas single-circuit heating boiler; the connection of an indirect heating boiler must be carried out by specialists.

• Circulation pump. Thanks to it, forced circulation of coolant is carried out through the heating circuit. When selecting a suitable pump, pay attention to the level of pressure it creates and productivity. Power consumption indicator in modern models adjustable within 50-200 W. Thanks to this, the speed of movement of the coolant can be changed depending on the situation.
• Hydroarrow. Several heating circuits can be connected to this container with pipes. Its task is to combine the supply and return pipes. As a result, it becomes possible to bring together systems with different temperatures and coolant speeds, smoothing out their mutual influence.

• Coarse filter. Inside the settling tank with a filter mesh, large particles in the water are retained. Most often we are talking about sand and scale. As a result, the thin heat exchanger tubes in the gas boiler are prevented from clogging.
• Two- and three-pass thermostatic mixers. Thanks to them, it becomes possible to create coolant recirculation, the temperature of which is an order of magnitude lower than that in the main circuit. A thermal head is used to control the mixer shutter. The valve changes its position in response to the temperature of the sensing element.

Pipes

Using pipes, the gas boiler is connected to the heating system, and the coolant is distributed in the required directions.

If the design of an autonomous heating system is done correctly, its parameters are absolutely stable and controllable:

• Temperature inside convection circuits (equipped with radiators or convectors). Should not be more than + 75-80 degrees. Heating of heated floors does not exceed + 25-35 degrees.
• Pressure. Permissible limits: 1 -2.5 kgf/cm2.

If the circulation pump fails, the thermostat will almost instantly stop the combustion process. This will protect the coolant from overheating and boiling. For this reason, the switching of the boiler and heating distribution is often carried out using polymer and metal-polymer pipes, which allows you to save on the purchase of expensive metal products.

• To implement sequential wiring of radiators and boiler switching, metal-plastic pipes with press fittings are most often used. Another common option is polypropylene products with aluminum reinforcement.
• When installing threaded fittings for metal-plastic, special care must be taken: if the O-rings move even slightly, this will lead to a leak. As a rule, such a nuisance should be expected after several heating-cooling cycles.
• Unreinforced polypropylene (or glass fiber reinforced) is characterized by very high coefficient elongation. An increase in temperature by 50 degrees provokes an elongation of each meter of pipe by approximately 6.5 and 3.1 mm, respectively. This option is also unsuitable.
• To organize radial wiring or underfloor heating, metal-plastic pipes with press fittings, pipes made of cross-linked polyethylene or thermally modified polyethylene are also used.

Varieties of heating schemes for a private house

In the very simple version There is no boiler wiring diagram at all. In the vast majority of cases, the factory equipment of boilers with electronic ignition consists of the following elements: a pump, an expansion tank, an automatic vent and a valve (with a pressure setting of 2.5 kgf/cm2). The location of all piping units is the building: as a result, the complex is transformed into a mini-boiler room.

As additional elements the system can be equipped with:

• Filter. Its installation location is the inlet pipe. As a result, the heat exchanger receives protection from contamination while increasing the hydraulic resistance of the circuit. This leads to a decrease in the speed of movement of the coolant, and the pump itself experiences additional load.
• Ball valves. They are installed at the inlet and outlet sections. This makes it possible to dismantle the heat exchanger or boiler while maintaining the heating circuit.

Floor-standing gas boilers with piezo ignition

Boilers with piezo ignition and floor-standing equipment do not belong to mini-boiler rooms: we are talking about heating devices that require external piping.

It includes:

• Pump. To select pump performance, use the formula Q = 0.86R/Dt (Q - productivity in m 3 / hour, R - thermal power boiler or a separate circuit, Dt is the temperature difference between flow and return). So that the convection heating system with gas boilers worked normally, the temperature difference should be 20 degrees (+75-80 degrees on the supply pipeline, and +55-60 on the return pipeline). A boiler power of 36 kW assumes the following reasonable minimum pump performance - 0.86x36/20 = 1.548 m 3 /h.
• Membrane expansion tank.
• Safety valve.
• Automatic air vent.
• Pressure gauge.

The optimal location for the safety group is the boiler outlet: it is here that the temperature and pressure indicators reach their maximum values. The pump is placed in front of the boiler, in an area with the lowest coolant temperature (this allows you to significantly extend the service life of the impeller and rubber seals). The expansion tank can be mounted anywhere in the system: the main thing is that the distance to the pump impeller is no more than two diameters (if it is installed in front of the pump).

When installed after the pump, this distance is increased to eight diameters. This distance is necessary so that pressure surges that occur during pump operation do not reduce the life of the tank membrane. To prevent condensation from appearing, the heat exchanger is often equipped with an additional small circulation circuit. If the return pipe is cooled, it is possible to add hotter coolant inside it (it is taken from the supply pipe through a mixing unit).

Natural circulation

The gravity system is characterized by complete energy independence: its operation is ensured by atmospheric pressure. Instead of a bulky safety group in the piping of a single-circuit boiler, an expansion tank is sufficient. For bottling, it is advisable to install a vent in front of the boiler heat exchanger: this will make it possible to completely drain the water into the sewer or drainage well. Typically, such a need arises in the event of a long departure, or when the gas supply is cut off. As a result, the system is protected from defrosting.

The individual components of the system are located as follows:

1. It is recommended to install the tank above all other elements.
2. The bottling located immediately after the boiler is positioned in the vertical direction (a small angle is allowed). Thanks to the acceleration section, the water heated in the heat exchanger rises to the top filling point.
3. It is important to maintain a constant slope when laying the bottling after the tank. As a result, the cooling water will return by gravity: in this case, air bubbles will be able to escape inside the expansion tank.
4. The boiler must be lowered as low as possible. The best place to place the heater - a pit, ground floor or basement. Due to the difference in height between the heat exchanger and heating devices, it is ensured proper level hydraulic pressure ensuring water circulation in the circuit.

Some features of arranging an inertial heating system:

• For internal diameter for bottling, a value of 32 mm is selected. If plastic or metal-plastic pipes are used, then the outer diameter is 40 mm. Thanks to the large cross-section, compensation is achieved for the minimum hydraulic pressure due to which the coolant moves.
• The gravity system sometimes includes a pump: however, this does not mean that the circuit loses its energy independence. In this case, the pump is mounted not in the filling gap, but parallel to it. To connect individual taps, a ball-type check valve is used, which is characterized by very low hydraulic resistance. Also install ball valve. If the pump stops, the bypass is shut off, which preserves the functionality of the natural circulation circuit.

Warm floor

There are several options for connecting them.

Hydroarrow

This node includes both circuits:

1. The first uses the movement of coolant between the hydraulic arrow and the boiler heat exchanger.
2. In the second, one or more heating circuits with different heating levels are switched to it.

The operating principles are as follows:

• The vertical hydraulic arrow makes it possible to select coolant at different temperatures. The top section will be hot and the bottom section will be cold.
• When water is taken from the upper pair of taps, switching of convection heating is allowed. Bottom pair used in an intra-field circuit.
• The coolant temperature below the switching level of the return pipe of the circuit at the junction of the water gun and the boiler may drop noticeably.

Recycling

In a parallel position to the main contour radiator heating or a small circuit in the area from the boiler to the hydraulic switch, a low-temperature circuit is being installed. It contains a bypass and a three-way thermostatic valve. Thanks to the pump, water constantly circulates inside the heated floor pipes.

To select new portions of hot coolant from the supply pipe when the temperature inside the return pipe drops, a three-way mixer is used. It can be replaced with a simple thermostatic valve equipped with a remote capillary-type temperature sensor or an electric thermocouple. The sensor is installed in a niche on the return line of the heated floor. The valve is activated when the coolant temperature drops.

Radiator connection of serial type

This option is possible if a condensing gas boiler is used, because The operation of classical equipment is difficult at return temperatures below +55 degrees. The fact is that a cooled heat exchanger collects condensate on its surface. The combustion products of gas contain, along with water and carbon dioxide, aggressive acids. In this case, there is a real threat of destruction of steel or copper heat exchangers.

Condensing boilers have a different operating principle. A special stainless steel heat exchanger (economizer) is used to collect combustion products. As a result, additional heat transfer occurs and increase in efficiency equipment. Because of this, the return pipe temperature level of +30-40 degrees is optimal. The heating system consists of two series-connected circuits - radiator and in-floor. The return pipe of the first is the supply pipe of the second.

Single-circuit boilers with DHW supply

To provide hot water supply, along with a safety group, pump and expansion tank, the piping of a single-circuit gas boiler must include an indirect heating boiler. A connection diagram for an indirect heating boiler with recirculation is possible. In this case, water is heated thanks to the coolant from the heating circuit. This leads to the appearance of two circulation circuits - a large one (through the heating system) and a small one (through the boiler). Each of them has shut-off valves, which allows you to turn them on separately. To break the supply bottling, a piping scheme is used for a single-circuit boiler with a boiler, immediately behind which a bypass with a tap is installed.

We are planning to install a double-circuit gas boiler in the house. What schemes are there, how to choose? Does the fact that the gas boiler is turbocharged or chimney affects the diagram? What influences the choice of scheme?

The connection diagram for all types of double-circuit boilers is the same, since both the turbocharged and chimney boilers have the same arrangement of pipes for connecting the boiler to the heating, water supply and gas systems.

Before starting the connection, it is necessary to install a filter for coarse cleaning. This will prevent debris from getting into the boiler. A shut-off valve should be installed on the boiler return, which is necessary in order to eliminate the need to air the coolant in the heating system. The tap must be mounted on a detachable connection so that it can be removed if necessary.

The choice of scheme is influenced by the number of storeys of the house and the amount of area that needs to be heated. The simplest scheme is a single-pipe or Leningradka, used for a one-story house.

This is what such a diagram looks like:

Numbers 1 to 9 indicate Ball Valves installed in the cold (1) and hot (2) water supply system, on the supply (3) and return (4) heating pipes, for draining the coolant (5 and 6), on the heating return (8 and 9). The remaining numbers indicate the squeegee (10), magnetic filter (11) and gas filter (12).

A more complex scheme is a two-pipe one, when the boiler will heat either coolant or hot water, but in no case at the same time. It is used for two-story houses With a large number rooms. From the boiler, heated water or coolant is sent to the supply pipeline, which should be located in the attic or to the heat supply risers, and a jumper and an adjustment throttle are installed on each radiator. Through the lower pipeline, which serves to drain the coolant, it returns to the boiler.

The connection diagram also includes installation of boiler piping, which may vary depending on the type of boiler and heating system. The piping is arranged with automatic or natural circulation.

What is the wiring diagram for double-circuit boilers?

The connection diagram for all types of double-circuit boilers is the same, since both a turbocharged and a chimney boiler have the arrangement of pipes for connecting the boiler to heating, water supply systems...

Wiring diagram for a wall-mounted double-circuit gas boiler

Owners country houses During the construction process, a very important issue must be resolved: how the premises will be heated. As a rule, private houses do not have the ability to connect to central system heating, so we have to look for alternative options.

There are several ways to set up an autonomous heating system at home. The option with gas double-circuit boilers is popular. The system operating on blue fuel has a number of advantages. It is reliable and affordable, since gas is not in short supply in our territories. With its help, you can arrange such a grid that it will be warm not only in a small house, but also in a cottage.

Traditional gas piping scheme wall-mounted boiler

Most often, owners give preference to double-circuit boilers. They are functional and reliable, allowing you to provide your home not only with heat, but also with hot water. There are many models of heating equipment on the market. The effectiveness of the system depends not only on the device, but also on the quality of installation work. Before proceeding with installation, you need to familiarize yourself with the design of the device, and also understand what the piping diagram of a double-circuit gas boiler is.

Double-circuit boiler design

Wall mounted double-circuit boilers very profitable and convenient. Their main advantage is their compact size. The equipment can be installed in almost any room, for example, in the bathroom or kitchen. Of course, experts recommend entrusting the installation of heating devices to professionals, however, if you really want to, you can do this yourself, having first familiarized yourself with the device, the operating principle and the nuances of installing the boiler. You also need to find out what the wiring diagram for a wall-mounted double-circuit gas boiler is.

A wall-mounted boiler is something like a small boiler room. It consists of the following elements:

• two heat exchangers. One is responsible for heating the coolant in the heating system, the second for hot water supply. As a rule, they work alternately. To avoid the inconveniences arising from this, you should buy devices with a dual heat exchanger;

Installation of a wall-mounted gas boiler

The piping scheme is determined by the type of heat exchanger.

Strapping schemes

So, five pipes are adjacent to the double-circuit gas boiler. One transports fuel, the others circulate water. If everything is clear with the gas outlet, then you will have to tinker with the water channels.

• one pipe is designed to connect the main coolant pipe to the return circuit of the heating system;
• the second channel connects the same coolant from a different angle with the supply pipe;
• the third channel is used to connect the additional coolant pipe to the water pipe;
• and the fourth pipe connects the channel supplying hot water to the tap with the second coolant.

Wiring diagrams for various gas boilers

The wiring diagram of a gas double-circuit wall-mounted boiler determines its operating principle. In this case it turns out as follows.

1. First, water is distributed from the main heat exchanger.
2. Further through three way valve the heating circuit closes and the coolant begins to flow into the additional heat exchanger. Hot water is being heated, heating is still in standby mode.
3. When the hot water tap closes, the system immediately switches to heating the coolant that circulates through the heating pipes.

Note! This scheme is not without its drawbacks. For a family consisting of two or three members, such a boiler will be quite enough. If the family is large, this type of heating system will not be able to serve the house efficiently. Troubles will arise during operation.

With boiler

If a boiler is also connected to the system, then the circuit will differ slightly from the general one. The number of pipes does not change. In this case, the heating circuit of the boiler is looped with an additional heat exchanger. Water pipe connects directly to the boiler itself, without contacting the heat exchanger. From the boiler, hot water is transported to the tap. There is hot water, but the heating system did not stop functioning.

This scheme has undeniable advantages, among which are the following:

• prevents clogging of the heat exchanger with sediment that remains after heating the water from the water supply;
• When hot water is used, the heating system does not turn off.

Boiler wiring diagram

But the question may arise: why install an additional boiler if the boiler is a double-circuit one and is required to provide the house with hot water. This may seem disadvantageous. However, there are cases when such a solution cannot be avoided, for example, if the boiler is already installed and copes well with heating the house, but there is not enough hot water for the family.

With electric boiler

Slightly different from the above option correct scheme piping of a double-circuit gas boiler, which operates together with an electric heating device. The main pipe of the additional heat exchanger is connected to the water supply, the second pipe is connected to the heating device. Mixers with an electric boiler are connected through pipes.

This scheme is quite beneficial in a number of cases. There is always hot water in the boiler; the temperature is maintained using a special heater. If you buy a device of sufficient volume, you will never face the problem of lack of hot water. You can save on both fuel and electricity, since water is in heating device It will arrive already warm. And there will be no interruptions in the operation of the heating system.

Important points

There are several ways to organize heating and hot water supply systems. The gas wall-mounted double-circuit boiler is one of best options increase the comfort of living in country house. To avoid unforeseen situations during operation, care should be taken to high-quality installation. When purchasing a device, pay attention to its power, whether it is enough to ensure the comfort of the family.

Note! Not only water, but also antifreeze can act as a coolant. If one type was used first, and then the injection of a second is planned, the pipeline should be thoroughly flushed beforehand. When antifreeze combines with water molecules, an explosion can occur.

If a high-quality double-circuit gas boiler is selected for organizing the heating system of the house, and the installation work, you will not have to deal with such troubles as malfunctions of the heating system, leaks and leaks, lack of hot water or insufficiently high room temperatures. To prevent problems, entrust the installation of heating equipment to professionals, because it is not as simple as it might seem at first glance.

Wiring diagram for a wall-mounted double-circuit gas boiler: installation

What could be the wiring diagram for a wall-mounted double-circuit gas boiler? Advantages of circuits with boilers or electrical heating devices. What do you need

Correct piping of a wall-mounted double-circuit gas boiler - device, diagram, connection

Correct, competent, high-quality organization of home heating contributes to uniform heat distribution throughout the living area. Piping a gas wall-mounted boiler with two circuits is a process during which the equipment is connected to the hot water supply. Properly executed piping fully ensures the supply of heat to the radiators and high-quality operation of the boiler.

Proper piping will have a much better effect on the operation of the boiler than purchasing expensive equipment.

Why do you piping a boiler?

The design of a double-circuit gas wall-mounted boiler requires mandatory piping.

The piping of a gas wall-mounted boiler is carried out in order to increase the service life of the system, as well as to ensure that the equipment does not overheat.

Thanks to the strapping, the room quickly warms up to a comfortable temperature, which is maintained for the required time. The most relevant piping is for solid fuel gas boilers. Timely installation of a wall-mounted double-circuit solid fuel gas boiler can completely replace expensive gas heating.

Piping a wall-mounted double-circuit gas boiler is a cost-saver and a way to effectively distribute thermal energy.

Classic strapping patterns

The design of a double-circuit wall-mounted gas boiler necessarily involves its piping, which guarantees long-term use of the heating system.

In order to avoid sudden temperature changes, you need to turn Special attention to regulate the inlet and outlet temperatures.

At the very beginning, circulation is carried out in a small circuit until a certain temperature is reached.

When the desired temperature is reached, circulation is carried out along a large circuit. It would be correct to create several circuits in order to ensure high-quality temperature control.

1. Circulation pump.
2. Distribution valve.
3. Expansion tank.
4. Filters.
5. Clamps, fasteners and other elements.

Piping a wall-mounted double-circuit gas boiler can be done in several ways.

There are the following connection methods to the energy consumption system: DHW system, heating and underfloor heating system.

The piping of a wall-mounted double-circuit gas boiler can be carried out using a direct or mixing circuit.

Emergency strapping scheme

The design of a wall-mounted gas boiler provides for an emergency boiler piping circuit. The emergency circuit ensures the full functioning of the heating system in emergency situations.

There are the following types of emergency piping scheme:

1. The source of water supply to the heating system is plumbing. A double-circuit wall-mounted gas heating boiler for such cases must have a hydraulic accumulator.
2. Gravity circulation for the boiler. After the pump is turned off, a special circuit is turned on small sizes, whose work is aimed at removing excess heat inside the heating system.
3. Powered by UPS. In order for the uninterruptible power supply to work at the right time, you must always monitor the charging of the batteries.
4. A double-circuit wall-mounted gas heating boiler for emergency situations requires a special circuit - an emergency circuit. The emergency circuit is a part of the heating system that makes the forced and gravity circuit work simultaneously.

Before connecting the wall-mounted gas boiler and for the right choice piping schemes, many factors should be studied and taken into account, the material capabilities and design of the heating system in the building should be assessed.

The double-circuit wall-mounted gas heating boiler provides more complex circuit piping than a boiler with one circuit, but such a system is much more efficient and practical.

Connecting a gas wall-mounted double-circuit boiler is complex step by step process which requires technical skills and knowledge. But if you prepare for this process, then connecting a gas boiler and organizing the boiler piping yourself is quite possible. Which scheme is better to choose depends only on the design of the heating system and personal wishes.

One of the optimal schemes is considered to be piping with natural circulation, since it is not difficult to do it yourself.

More on this topic on our website:

The simplest piping of a double-circuit heating boiler with polypropylene, the diagrams, photos and drawings of which are presented on this page, can be made by your own.

A simple piping of a wall-mounted double-circuit gas boiler, the photo of which you see on this page, can be done by your master, or you can.

If you are interested in how to properly piping a gas heating boiler, the diagram on this page will help you figure it out.

Often private homes do not have access to centralized systems, so the owners have to independently decide how to implement it.

Piping of a wall-mounted double-circuit gas boiler

Before connecting a wall-mounted gas boiler, you need to study the boiler wiring diagrams. The article describes classic and emergency strapping schemes.

Heating boiler piping diagrams for various types of circulation and circuits

When building autonomous heating At home, it is important to properly think through and carry out the piping of gas, solid fuel and electric boilers. Let's look at possible circuits and piping elements, talk about classic, emergency and specific circuits, as well as the main equipment of these circuits.

The basic principles of piping a boiler of any design are safety and efficiency, as well as the maximum service life of all elements of the heating system. Let's consider various options for organizing heating, so that when individual construction make an informed and most appropriate decision for a particular case.

Connecting the boiler to power supplies

If the boiler is operating at gas fuel, then you need to organize a gas supply to it. For main gas supply, this must be done by an employee gas service. If the heating is from cylinders, you need to conclude a lease agreement with Gaztekhnadzor, and entrust the installation to a company that has permission to this type works All work related to gas is potentially dangerous and this is not the moment when you should save money and do the work yourself.

1. Heating supply. 2. Hot water for domestic needs. 3. Gas. 4. Cold water to DHW circuit. 5. Heating return

When using bottled gas, a reducer must be used that combines a group of cylinders

The electric boiler must be connected to the network. The boiler and terminal box must be grounded; all connections are made with copper wiring with a cross-section no less than that specified in the technical data sheet for the equipment.

Boiler on solid fuel is always autonomous and requires only connection of heating and hot water supply pipes. Only blocks require connections to electrical power circuits automatic control, if they are involved.

Single and double circuit boilers

Single-circuit boilers designed primarily for heating. Only one circuit passes through them, including automation, pipe distribution and radiators. An indirect heating boiler can also be included in the circuit to supply hot water to the mixers of washbasins, showers and bathtubs. The boiler power is selected with an appropriate power reserve. The feasibility of such a connection in most cases is somewhat questionable, since it disrupts the stability of the heating system by sudden heat withdrawal. The problem can be solved by equipping the circuit with a complex control system, which in some models may come complete with the boiler.

Single-circuit boiler with indirect heating boiler: 1. Boiler. 2. Boiler piping. 3. Radiator. 4. Indirect heating boiler. 5. Cold water input

In a double-circuit boiler, hot water supply, along with heating, is included in the functions of the boiler and constitutes one of its two circulation circuits. More stable operation of both systems is achieved when boilers are equipped with two separate heat exchangers for two circuits. Feature of the system: no hot water storage tank.

Connecting a double-circuit boiler: 1. Boiler. 2. Heating boiler piping. 3. Heating circuit. 4. Cold water input

Boiler piping diagram for natural circulation

Natural circulation is based on the laws of physics - thermal expansion of the coolant and gravity, therefore the boiler piping does not include pressure equipment.

In order for the water in the circuit to move continuously, several rules must be followed.

The boiler should be located at the lowest point of the house, preferably in the basement or in a specially equipped pit.

The pipeline from the top point to the heating radiators, and from them to the “return”, must be made with a slope of at least 0.5° to reduce the hydraulic resistance of the system.

Heating with natural circulation. H - the difference in the levels of the supply and return lines, determines the pressure in the heating circuit

The diameter of the heating distribution pipes must ensure a water speed of no lower than 0.1 m/s and no higher than 0.25 m/s. Such values ​​must be taken in advance and checked by calculation, based on the temperature difference at the inlet and outlet (gradient) and the difference in height along the axes of the boiler and radiators (at least 0.5 m).

The gravitational circuits of the boiler can be of open and closed types. In the first case, an open-type expansion tank is installed at the highest point of the system (in the attic or roof), which also acts as an air vent.

The closed system is equipped with a membrane tank located on the same level as the boiler. Because closed system does not have direct contact with the atmosphere, it must be equipped with a safety group (pressure gauge, safety valve and air vent). The group is positioned so that the air valve is at the highest point of the circuit.

Natural circulation systems are independent of power supply and are most common where electrical networks are absent or unreliable.

Boiler piping diagram for forced circulation

The stimulator of water movement in a forced circulation circuit is a circulation pump. The circuits can also be open (with an open type expansion tank) and closed (with a membrane tank and a safety group).

The circulation pump, as a rule, is installed in the place where the water temperature is the lowest - at its entrance to the boiler, and is mounted on the same site. The pump is selected based on the heating calculation, showing the required coolant flow, and the characteristics of the boiler. The coolant flow rate is regulated based on the return water temperature based on an impulse from a sensor installed at the boiler inlet.

1. Boiler. 2. Security group. 3. Expansion tank. 4. Circulation pump. 5. Heating radiators

One- and two-pipe heating system wiring

The single-pipe system is widespread in older apartment buildings. The water temperature from radiator to radiator is constantly decreasing, which leads to an uneven supply of heat to individual rooms. In a two-pipe system, the coolant is distributed evenly across all radiators; when it loses temperature, it enters the second pipe - the “return”. Thus, the two-pipe system provides the house with heat more evenly.

1. Single-pipe wiring diagram. 2. Two-pipe scheme wiring

Manifold wiring diagram of the heating system

At large quantities For heating radiators located on different floors, or when connecting a “warm floor,” the best wiring diagram is a manifold. At least two collectors are installed in the boiler circuit: on the water supply - distributing, and on the “return” - collecting. The manifold is a piece of pipe into which taps with valves are inserted to allow regulation of individual groups.

Collector group

An example of connecting a heating circuit and a “warm floor” system using a manifold group

Collector wiring is also called radial, since the pipes can diverge in rays different sides around the house. Such a scheme in modern houses one of the most common and considered practical.

Primary-secondary rings

For boilers with a power of 50 kW or more or a group of boilers that are intended for heating and hot water supply to houses large area, the scheme of primary-secondary rings is used. The primary ring consists of boilers - heat generators, secondary rings - heat consumers. Moreover, consumers can be installed on the forward branch and be high-temperature, or on the reverse branch and be called low-temperature.

To ensure that there are no hydraulic distortions in the system and to separate the circuits, a hydraulic separator (arrow) is installed between the primary and secondary circulation rings. It also protects the boiler heat exchanger from hydraulic shocks.

If the house is large, then after the separator a collector (comb) is installed. For the system to work, you need to calculate the diameter of the arrow. The diameter is selected based on the maximum productivity (flow) of water and flow speed (not higher than 0.2 m/s) or as a derivative of the boiler power, taking into account the temperature gradient (recommended value Δt - 10 ° C).

Formulas for calculations:

• G—maximum flow rate, m 3 /h;
• w is the speed of water through the cross section of the arrow, m/s.

• P—boiler power, kW;
• w—water velocity through the cross section of the arrow, m/s;
• Δt—temperature gradient, °C.

Emergency circuits

In forced circulation systems, the pumps are dependent on a power supply that may be interrupted. To prevent boiler overheating, which can damage the equipment or even lead to depressurization, boilers are equipped with emergency systems.

First option. Source uninterruptible power supply or a generator that will power the circulation pumps. In terms of efficiency, this method is one of the most optimal.

Second option. A small reserve ring is being installed, operating on the gravitational principle. When disconnected circulation pump A natural circulation circuit is included in the system, providing heat transfer to the coolant. The additional circuit cannot provide full heating.

Third option. During construction, two full-fledged circuits are laid, one operates on the gravitational principle, the second using pumps. Systems must have the ability to exchange heat and mass during an emergency period.

Fourth way. If the water supply is centralized, then when the pumps are turned off, cold water is supplied to the heating circuits through a special pipe with a shut-off valve (a jumper between the water supply and heating systems).

Heating boiler piping diagrams for various types circulation and circuits

When building autonomous heating at home, it is important to properly think through and perform the wiring of gas, solid fuel and electric boilers. Let's look at possible schemes and strapping elements, let's talk about