The scheme of tying the gas heating boiler and its elements

The heating boiler is a device in which fuel is burnt and the heat transfer fluid is heated. Heat still needs to be fed into the water circuits of radiators, a warm floor, a boiler, etc. It is necessary to have a scheme for tying the gas heating boiler - everything that connects it to the appliances in the rooms.

Appointment of strapping

1. Maintaining a stable coolant pressure in the system.
2. Removing air from the liquid that interferes with its circulation. With the formation of an air stopper, the passage of water through this place ceases. In the correct scheme, air vents are installed.
3. Cleaning of the coolant from contamination. Mechanical impurities worsen the operation of the equipment. In this regard, the installation of filters for cleaning.
4. Compensation for the temperature expansion of a liquid. In order for the liquid not to destroy the system by excess pressure, a reservoir compensating expansion is installed.
5. Connect one or more circuits to the system.
6. Accumulation of hot water with a connected boiler.

The simplest circuit with one circuit

The simplest scheme of tying up a gas heating boiler is compiled in accordance with its characteristics and requirements.

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

Tying the gas heating boiler: the scheme, photo

The simplest system with one circuit is made according to its characteristics and requirements. On the supply side, a check valve and a ball valve are installed.

On the return or pumping pipe, a pump is installed to create a fluid circulation, which ensures uniform distribution of the coolant through the rooms. Before it is connected a strainer, located downstream the settler. Before entering the liquid into the boiler, it is advisable to install a fine filter.

Closer to the boiler, an expansion tank of a closed type is installed. In it there is a membrane, allowing to dump superfluous pressure at temperature expansion of a liquid.

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

The scheme for tying the gas heating boiler contains a safety valve. When boiling the coolant from overheating, the expansion tank may not be able to cope with the pressure drop. The consequences can be as follows:

• Breaks in pipelines and leaks of joints;
• Destruction of fittings and pipes;
• Explosion of the boiler capacity.

The safety valve is installed as close as possible to the boiler, because it starts to build up pressure.

On some units, safety groups are established, consisting of a relief valve, an automatic air vent and a manometer. The instruments 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 by others, where when the critical temperature reaches the liquid, the burners or electric heaters are switched off.

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

Natural circulation

The principle of operation is based on the reduction of the specific weight of water upon heating. The hot liquid is forced out cold, passes through the heaters, gives off some of the heat and returns to the heating back into the boiler.

The installation of the supply and discharge pipes is performed with a slope of at least 3 ⁰ , so that natural circulation occurs and the air in the system accumulates less.

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

The return goes from above also with a slope. With proper installation and selection of pipe diameters, the natural circulation of power is almost as good as the forced circulation.

Advantages of the method:

• Simplicity of the system;
• Ease of installation;
• Quiet operation;
• durability.

The system is suitable for heating a small house with a total floor space of not more than 100 m ² . The drawbacks include the duration of warming up of rooms and the impossibility of temperature regulation in individual rooms.

The gravity scheme is used mostly in small houses and in the country, 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 pumps through the system a heating medium and the heating efficiency is increased by 30%.

Advantages also include the possibility of temperature control and a small flow of pipes during installation. The system is still much more expensive, because it is more complicated and requires more devices. The installed elements require balancing, and the entire system requires regular maintenance. In addition, a source of electricity is needed.

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

Strapping with polypropylene

Plastic pipes came to replace metal everywhere, including for water pipes. For heating use multi-layer reinforced products that withstand high pressure. Thanks to the solder joints, a monolithic piping of the gas heating boiler with polypropylene is obtained. Schemes are created of any complexity and in a short time.

Important! The simpler the scheme of the heating system, the more reliable it is, and the productivity is higher.

Unlike the coolant, the gas is connected to the boiler through a metal pipe with a paronit gasket. Sealing is sealed and does not burn.

Tying of a floor gas heating boiler: scheme

The dimensions of a conventional floor boiler are small, but it takes a lot of space to install it together with the harness. All equipment including a circulation pump, elbows, bushings, manifold, cranes and devices is difficult to place compactly.

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

The hot water supply system requires a separate pump (in the absence of a central water supply), an expansion tank and a thermostatic mixer.

Gas to the boiler must be properly connected. To do this, you order the project documentation, which is made up of specialists. Entry into the house of the gas pipe is made in the presence of a trip device in the event of an emergency. Gas connect special services, using special pipes, hoses and other equipment.

Wall-mounted boiler installation

Boilers can be hung on the wall even in the kitchen. They take up little space. The piping of the wall gas heating boiler (the diagram below) comes complete and can even be integrated in the boiler. The compact arrangement of equipment requires less space, but similar models are more difficult to maintain.

The disadvantage of wall-mounted boilers is low power. In addition, the devices do not work without electricity, and the natural circulation of the coolant is rarely used for them. On the other hand, almost all boilers are already equipped with electronics and electricity is necessary for them. In places with its unstable feeding it is possible to supply an uninterrupted power supply.

In most wall-mounted models, a double-circuit gas heating boiler is provided, the circuit of which allows the house to be supplied with hot water.

The drawback of the two-circuit variant is the shutdown of the heating during the consumption of hot water. This is especially noticeable when the boiler capacity is small. If it is enough, 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 a sufficient number of radiators with thermal inertia.

Conclusion

The scheme of tying the gas heating boiler is compiled in accordance with its characteristics and requirements. For a summer residence the system of natural circulation through one contour approaches, and for the big house - with compulsory and многоконтурной.