The operation of modern climate control equipment is not complete without the use of thermostats. These are small devices, thanks to which the user can control the parameters of the microclimate. In particular, such devices are used in sets of floor heating systems, air conditioners, boiler stations, etc. Today, you can find a variety of device designs on the market for accessories for heating systems, but a mechanical thermostat is considered the most affordable, simple and reliable solution in this segment.
How the device works
Classical models of this type work on the principle of changing the structure of certain substances against the background of an increase or decrease in temperature. In this case, we are talking about gas mixtures enclosed within the structure. Under the influence of temperature fluctuations, there is an expansion or contraction of the filling volume of the section in which the active substance is contained. These processes just act on the sensitive membrane, making appropriate adjustments to the readings. At the same time, a mechanical thermostat for heating serves not only to reflect the current temperature regime, but also givesthe ability for the user to configure the device for a specific operating program. Advanced control relays, for example, can be programmed, although this principle of operation still applies for the most part to electronic models.
Varieties
The main feature of the separation of models of this type is the method of installation, although it is not the most important in terms of operational nuances. Nevertheless, the manufacturers themselves distinguish between wall-mounted and suspended devices. That is, the former are integrated into the wall niche and practically merge with the surface, while the hinged ones can be mounted in a rack or a special supporting structure. Again, in terms of operation, the presence or absence of a sensor for monitoring microclimate parameters is more significant. A typical mechanical thermostat contains the same substance that determines the temperature regime directly in its housing. However, in modern models, even of a mechanical type, a remote method for monitoring microclimate parameters is increasingly common. This means that the thermostat is divided into two components: a sensor that records the temperature readings at the place of its installation, and a control relay.
Features of models for boilers
Domestic boiler plants are considered one of the most complex units in the category of heating equipment. Consequently, the thermostat must also work with a wide range of operating parameters. Moreover, it is in the maintenance of boilers that two- and three-channel models are often used. They allow separate controlnot just different parameters, but, in fact, devices. An illustration of this approach can be a device that simultaneously controls the functions of the boiler itself in the form of a combustion chamber, and in a separate order - a boiler water heating installation. In addition, it is thermostats for heating boilers that are often produced with remote sensors and the possibility of programming.
Key Features
There are several characteristics to consider when evaluating the appropriate thermostat settings for a particular application. The base will be the maximum load power, but the same thermostats for heating boilers with an indicator of 3.5 kW are quite suitable for the most powerful household unit, so there are no particular difficulties in this choice.
It is much more important to calculate the optimal temperature ranges that a particular modification can work with. For example, most indoor devices have a scale from 0 to 40 °C. But if necessary, you can find versions that capture the negative range by an average of 10-15 degrees. Another important parameter is the case material. Usually a mechanical thermostat is made of plastic, but for harsh environments, consider using a metal model, although it is heavier and usually more expensive.
Thermostat Manufacturers
The market offers enough solutions for any need, including boiler control requirements. In particular, the mechanical thermostat TDC 1 fromThe manufacturer Ballu has proven itself from the best side thanks to its functionality, reliability and high-quality assembly. True, this model has a rather narrow range of operating temperatures from 10 to 30 ° C, so it may not be suitable for any boiler.
More options for temperature control are offered by Electrolux in its Basic ETB line. It is also worth paying attention to offers from DEVI, HEAT-PRO, TIMBERK with TMS modifications, etc. But, if we discard the temperature scale, then the standard mechanical Ballu thermostat will outperform its competitors due to the low price tag of 700 rubles.
How to install the appliance?
First of all, preparatory measures are taken, which may consist in creating a niche in the wall like a rosette. Next is the cabling. It is important to consider that, in addition to connecting the main power line, the device must be interfaced with the equipment. Another thing is that the same wiring can be avoided by buying a wireless model. For example, modern convectors with a mechanical thermostat are already equipped with radio devices in basic configurations, saving the user from unnecessary trouble with installation. But, far from all units support the wireless principle of interaction with the control equipment, and this nuance must be taken into account in advance. The same applies to the method of installing a remote sensor, which will also require careful preparation of a special point for fixation. Another thing is that the sensor will not require intervention in the wall. For himit is enough to prepare a mounting bracket on which a small case will be planted. All the necessary fittings of this kind are usually included in the basic sets of thermostats.
How to use a mechanical thermostat?
Immediately after installation, you must turn on the equipment at the optimum temperature for the middle range. You should not expect to quickly acquire the necessary indicators - for a boiler, for example, this may take several hours, depending on the version. Further operation will depend on the capabilities of the device itself. For example, the simplest mechanical room thermostat assumes only the ability to turn it on / off with setting the mode you need at the moment. More technologically advanced models can be configured for a week or even a month of operation with automatic changes in performance depending on the weather outside or the time of day. This technique works like smart home components.
Conclusion
Against the background of the wholesale transition to digital technology, it may seem strange to purchase a mechanical device. But there may be serious reasons for this. First of all, the very independence of the device from the electronic principle of operation adds to its reliability. In addition, models of this type are cheaper and not as sensitive to wiring failures. The same convectors with a mechanical thermostat will not suffer in the event of a power surge or overload in the network. However, negative factors should also be taken into account.choice. The disadvantages of mechanics include an error of 2-3 degrees and the sensitivity of the filling to physical influences. For example, even a slight blow can affect the accuracy of readings in the future. But for the sake of justice, it should be noted the desire of manufacturers to minimize these disadvantages. This is evidenced by the increase in accuracy due to the use of modern element base, and the supply of cases with additional protective coatings with water-repellent and shockproof materials.
