Ризики та шкода від низької температури
What happens to a solid fuel boiler when the temperature of its "return" coolant is below 50 °C? The answer is simple - a resinous deposit appears on the entire surface of the heat exchanger. It reduces the boiler's performance, significantly complicates its cleaning and, most importantly, can lead to chemical damage to the boiler's heat exchanger walls. To prevent such a problem, it is necessary to provide appropriate equipment when installing a heating system with a solid fuel boiler.
To prevent the formation of tar deposits, it is necessary to ensure that the temperature of the coolant returning to the boiler from the heating system is not lower than 50 ° C. It is at this temperature that the water vapor contained in the flue gases of a solid fuel boiler begins to condense on the walls of the heat exchanger (passes from a gaseous state to a liquid state). The transition temperature is called the dew point. The condensation temperature directly depends on the fuel moisture content and the amount of hydrogen and sulfurous formations in the combustion products. As a result of the chemical reaction, iron sulfate is obtained - a substance useful in many industries, but not inside a solid fuel boiler.
It is quite natural that manufacturers of many solid fuel boilers remove the boiler from the warranty, in the absence of a return water heating system. After all, here we are not dealing with metal burning out from high temperatures, but with chemical reactions that destroy any boiler steel.
The simplest solution to the problem of low return coolant temperature is to use a thermal three-way valve (anti-condensation thermostatic mixing valve).
A thermal anti-condensation valve is a thermomechanical three-way valve that provides heat transfer between the primary (boiler) circuit and the heat transfer medium from the heating system in order to achieve a fixed boiler temperature. In essence, the valve allows the coolant to flow in a small circle and the boiler heats itself. After reaching the set temperature, the valve automatically opens the access of the heating medium to the heating system and operates until the return water temperature reaches the set values again.
Be aware of possible risks and harmful factors that damage your boiler and reduce the efficiency and operating time of the heating system. Take care of the proper operation of your equipment in advance to stay warm and safe.
We wish you warmth and comfort!