If you want the house to be warm and cozy, you will need a competently executed strapping of a solid fuel heating boiler. The scheme of this procedure will be considered in the article a little below. The strapping itself is the installation of all equipment suitable for the boiler. As a result of the strapping, a single heating system should be obtained. Often, this procedure is done with your own hands without the participation of professionals.
A bit of general information
Before tying is done, several important details must be taken into account. For example, the pressure in the system and the temperature of the coolant at the outlet of the boiler must not exceed the permissible values. For this, protective devices and warning systems are installed. In addition, the temperature of the liquid (coolant) at the inlet and outlet should be approximately the same. In any case, the difference should not be more than 20 degrees Celsius. This requirement is especially relevant for steel equipment, since the formation of condensate inside the case is undesirable effect on durability. Do not forget that the strapping of a solid fuel heating boiler, the circuit of which should be chosen for a reason, requires the presence of automation and sensors. In addition, it is advisable to install tanks for domestic hot water, etc. Well, now let's talk about the most interesting.
Open system bundling
This scheme is suitable if natural circulation is used. We can say that in technical terms this is the easiest option. This is due to the fact that we will deal with a small amount of various equipment and devices. The key advantage of such a scheme is that it is completely non-volatile. The downside is that there is no way to regulate the temperature at the outlet of the boiler. Often this leads to an accelerated corrosion process.
During installation, some rules must be observed. For example, to ensure natural circulation, the heating boiler is located 50 cm lower than heating radiators. In this case, the pipes are mounted at a slope in the direction of fluid circulation, and their diameter should be large enough. The highest place in the system is best for installing an expansion tank. The less you use different locking devices, the better the flow of the coolant will be.
Closed loop systems with natural circulation
The fundamental difference between this method and the previous one is that a closed membrane tank is installed . In priority, its installation should be carried out on the return line of the heating system. In this case, it is important to comply with the requirement regarding its volume. So, the amount of coolant in the membrane tank should be at least 10% of the total amount of fluid in the system.
The layout of the solid fuel boiler piping involves the use of a safety valve to relieve pressure, as well as an air vent. Installation of equipment can be carried out separately or in one device, which will be a safety group of the boiler. By the way, you need to understand that most of the modern heating equipment already has all these elements in its system, so additional installation is not needed.
Circulation of gas and solid fuel boiler with forced circulation
For the organization of forced circulation, it is necessary to use a pump. In most cases, it is mounted on the return line between the pipe and the tank. The pump is monitored by a temperature sensor, which is mounted on the return pipe.
I would like to note that the use of a pump makes the system more efficient. But in this case, you need to connect to the mains, which increases the consumption of electricity. The system also requires an uninterrupted and stable electrical connection, so it is recommended to install protective equipment, for example, stabilizers or at least fuses. In general, this layout of the solid fuel boiler strapping is extremely relevant and effective.
About the collector connection method
Such a scheme is used only in systems with forced circulation. The difference from the above method is that in this case, collectors (combs) are used. The devices of such devices are quite simple. In fact, this is a segment of a large diameter pipe having one inlet and several exits of a smaller diameter. Accordingly, such equipment is connected to the input and output of the boiler.
The advantages of such a scheme are that you will be able to turn on the heaters individually. This is achieved due to the fact that they are supplied with a coolant of the same temperature. It is also convenient to control such heating devices. Of the shortcomings, it is worth noting the high metal consumption of the collector and the complexity during installation.
Harnessing a solid fuel boiler with a heat accumulator
This scheme is good in that it is suitable for both natural and forced circulation. During the installation process, two circulation circuits are necessary. One is placed between the boiler and the heat accumulator (TA), and the second is between the heat accumulator and the main heating system.
During operation of the equipment, the coolant enters the TA. A thermal battery is a storage tank having a thermally insulated housing. The result is a gradual accumulation of heat in the TA. If necessary, it is given to the heating system. It is worth noting that the binding of a solid fuel boiler with a heat accumulator is also interesting because even after turning off the heating equipment from the TA tank, heat will be given off for some time. The method is good in that it slightly increases the efficiency and reduces fuel consumption.
About connecting alarm systems
We have already figured out a bit about how the binding of a solid fuel heating boiler is performed. As you can see, any scheme can be used, however, a lot depends on the circulation used. But in any case, you must take care of the availability of alarm systems. They are necessary to protect against:
- excess pressure;
- exceeding the temperature of the coolant;
- prevent condensation on the inside of the boiler.
The safety valve should be installed on the supply line when exiting the boiler. Often, the valve is built into the boiler, but if it is not, then you can install it manually. A drain hose must be connected to the valve pipe. Excess fluid will go there. It can be connected to the sewer or put a suitable container.
Arrangement of an additional circuit
An additional circuit is installed to protect the equipment from overheating. The circuit itself has natural circulation and is connected to the DHW tank. If the system operates normally, the internal pressure closes the additional circuit with a check valve. As a result, the coolant does not circulate there. But when the pump shuts down for any reason, forced circulation in the system becomes impossible. As a result, an additional circuit with natural circulation opens, and the coolant is cooled to the required temperature. If you are strapping a solid fuel boiler with your own hands, then it is advisable to acquire such a system. It will be useful in many emergency situations.
Thermostatic mixer installation
So we already figured out how the binding of a solid fuel boiler and an electric boiler, as well as a gas one, is performed. As you can see, all the circuits are very similar to each other and differ in the additional equipment used. One of these accessories is a mixer. It is necessary to maintain a certain temperature of the coolant at the inlet of the boiler. It is best to install the mixer in the return pipe, and then use a jumper to connect it to the main line. This will protect the boiler from condensation on its walls. If necessary, the device will open, diluting the cold coolant with hot. That, in principle, is all that can be said about such an event as tying a solid fuel heating boiler. The scheme is selected depending on the type of circulation and heating equipment used.