Gas temperature controllers. What is a good room thermostat for a gas boiler

In order to create the most comfortable conditions in the room for the heating period, the heating system must be balanced and have the possibility of constant regulation. Modern gas boilers, unlike their predecessors, provide the ability to change power over a wide range without a significant loss in efficiency.

Due to modulation, some models allow you to change the power from 6 to 24 kW, this creates the prerequisites for creating the necessary thermal conditions in residential premises and obtaining significant savings on fuel consumption. By itself, the heating installation cannot perform control functions - its task is to provide heating of the coolant, but the frequency of boiler starts and power can be adjusted using external control devices. One of these devices is just a thermostat, which will be discussed in this article.

Why do I need a thermostat for a gas heating boiler?

Any heating system is a closed circuit filled with water or antifreeze. The boiler heats the coolant, the circulation pump pumps it through a system of pipes and radiators, heating radiators transfer heat to the end consumer - heating the air in the room. In a perfectly balanced system, the boiler must operate continuously at maximum efficiency so that the amount of heat generated by the heating installation is neither more nor less than what is required at a particular time.

For this you need:

regulate the temperature of the coolant

receive data on the current temperature in the heated room

The temperature of the heat carrier is regulated depending on the temperature outside. As a rule, this device is called an outdoor temperature sensor. That is, with a connected sensor, the boiler will independently select the desired coolant temperature. This is very convenient, because sometimes the temperature outside can change over a wide range in short periods of time. Basically, these changes occur at night and the owner of a gas boiler that is not equipped with such automation is forced to constantly run around and “tweak” these settings. A particular inconvenience occurs when the boiler is located in a separate boiler room or basement.

It remains to find out what the current temperature is in the room to make a decision to turn on the boiler and constantly monitor the further change in this temperature in order to turn off the boiler when the desired value is reached. This is what is needed thermostat for gas heating boiler! It gives a signal to start and stop the boiler, depending on the set temperature in the room.

A room thermostat and an outdoor temperature sensor are different devices with different purposes, but they are an integral part of one system.

It must also be understood that the best result can only be achieved if the heating system is initially designed correctly and the rooms are properly insulated. After all, if the house has low energy efficiency, frequent switching on of the gas boiler cannot be avoided and the system will have a strong inertia.

Frequent starts of the gas boiler inevitably lead to a decrease in the resource of the actuators: fan, pump, electronic control board. Some relays used on the board have a passport reserve of 100 thousand cycles. If, for example, the boiler is turned on every ten minutes, then the passport number of cycles will be reached in about 3 years.

So we figured out that thermostat necessary to control the on and off of the gas boiler - then we will consider the principle of its operation.

What is the working principle of a gas boiler thermostat?

In modern heating systems, all processes are controlled by an electronic board. In most cases, there is a place on it for connecting a thermostat - these are two contacts connected by a jumper. The principle of operation is extremely simple: the contacts are closed - the boiler turns on, open - it does not turn on. The jumper in the standard supply of the boiler constantly closes the contacts, and the cycle of operation occurs according to its own logic set in the settings (for example, by a timer).

In the case when a thermostat is connected instead of a jumper, the contacts are closed or opened according to the logic already set by the thermostat. It turns out a switch that, either mechanically or electronically, closes and opens contacts instead of a jumper.

If the temperature of the room in which the thermostat is installed is lower than the set one, the switch will close and the boiler will start, as soon as the temperature rises to the desired one, the contacts will open and the boiler will turn off the burner. Schematically, the principle can be seen in the figure.

Depending on how the room temperature is measured, thermostats can be mechanical or electronic. The main difference is the accuracy of the readings themselves and the possibility of additional settings. Electronic room thermostats allow for a more flexible approach to temperature control and have the functions of programming operating modes at different times of the day or on different days of the week.

For example, lowering the temperature in some rooms during the day, even by a few degrees, can provide tangible savings in gas consumption over a long period of time.

What are thermostats?

According to the method of communication with the heater, thermostats can be wired and wireless.

In the latter, the module with a temperature sensor is located directly in the room in which the adjustment is carried out, and the module for closing the contacts is already installed next to the boiler and receives signals via a radio channel.

Proven in practice: the use of regulation allows you to get significant - up to 30% savings in gas consumption.

Conventional thermostats for a gas heating boiler, which were mentioned above, allow you to achieve a certain comfort and savings, but the maximum can be obtained only with the use of special temperature control schemes in each room.

This is possible only with the use of a central control unit and regulators in each room.

With this regulation, the controller makes a decision to switch on based on the set temperature parameters in each room, and to maintain the temperature in the rooms, special controllable valves on the radiators are used. The use of such systems allows for full-fledged climate control in the house and provides maximum energy savings, but their cost is, of course, significantly higher.

Also, the user gets the opportunity to remotely control the boiler via GSM connection or via a smartphone, the possibility of programming and informing about emergency situations. This is especially true for owners of country houses. Timely received information about the accident can prevent unpleasant consequences.

How is the thermostat installed?

In principle, installing a thermostat is not difficult, but if you are not sure that you have the necessary skills, it is better to use the services of a specialist.

So, the first thing to do is open the instructions (operating manual) for the gas boiler and find the layout of the connectors on the board. On the wiring diagram, the location of the place for connecting the thermostat is clearly marked and it remains only to remove the top cover of the boiler and the protective cover of the control board. There are usually no other jumpers on the board itself, and the thermostat connection point is indicated by the letters “Ta”.

Before carrying out work, it is imperative to make sure that the gas boiler is de-energized and there is no voltage on the terminals! Some Internet sources say that the signal voltage for connecting the thermostat on the boiler side is not dangerous 24 Volts - ALWAYS check it !!! For example, in BAXI boilers there are exactly 220 Volts !!!

Further, according to the instructions for the thermostat, it is necessary to connect it to the boiler board instead of a jumper and assemble everything in the reverse order. It is better to connect with an insulated copper cable with a cross section of at least 0.5 mm2.

Some thermostats support the connection of both heating and heating installations and there may be several outputs. Those. there will be a fundamental difference in the operation of the switch: what state will be in the initial position - normally closed or normally open. For heating installations, the connection must be made to a normally open initial state. When the temperature drops, the contacts will close and a signal will be sent to turn on the boiler (as an example, see the connection diagram for the ZONT H-1B GSM thermostat).

As a rule, manufacturers of boiler equipment offer thermostats as additional accessories, in principle, at fairly reasonable prices. In principle, these devices do nothing supernatural, so when choosing, first of all, you should pay attention to the price of the device and the presence of really useful functions in it, such as the ability to program and set the temperature hysteresis and accuracy. Electronic models will be preferable, as they have more precise adjustment. It is very important to choose the right place to install the thermostat. It should be located in a neutral place with respect to heat sources, preferably where it will not be exposed to sunlight.

It is also wrong to place it close to heating radiators - in this case it will heat up quickly and stop the boiler ahead of time. The location for the thermostat should be chosen to best match the comfort temperature for the occupants. Recommendations for installing a room thermostat can be found in the operating instructions.

A room thermostat is an automatic device whose task is to regulate the temperature regime of a heating device. The device monitors the temperature of the room in the air, and, if necessary, gives a signal to the boiler to increase or decrease its power. Typically, boilers are equipped with built-in programmers, however, in some cases, additional devices need to be connected separately.

Varieties of thermostats

Room thermostats are classified according to the installation method, functionality, and technical device.

According to the installation method, they distinguish:

• Wired thermostats, where contacts between units are maintained by means of wires. The advantage of such devices is the ability to transfer data to remote locations (more than 50 meters). The mains power supply is usually used as the power source.
• Wireless thermostats, where the controller communicates with the execution unit using periodic signals. The advantage of wireless technology is that there is no need to make holes for wires. The main disadvantage: reinforced concrete walls greatly reduce the signal strength and limit the working radius for the device.

Room thermostats for boilers do not create a harmful electromagnetic field, but only periodically transmit a small power pulse. In addition to safety, this solution makes it possible to save battery power.

By functionality, thermostats are classified into:

• simple ones that maintain the desired temperature;
• programmable, where it is possible to set the desired mode for the week ahead (with an accuracy of up to a minute).

According to the technical design, thermostats are divided into:

• electronic;
• electromechanical;
• mechanical.

Electronic thermostats

An electronic room thermostat basically has three main components:

• temperature sensor;
• signal transmitter;
• thermal relay.

Electronic thermostat can be used as part of a "smart home"

The main advantage of electronic temperature controllers is the accuracy of work on identifying and correcting the temperature regime in the room. Such a device is easy to manage, it can be used as part of a "smart home".

Electromechanical thermostats

An electromechanical room thermostat is simpler than an electronic one in terms of internal structure. The central element of the devices is the relay. This assembly looks like a cylinder in the form of a tube, which is filled with a temperature-responsive substance. As soon as the boiler is heated, the substance expands. And vice versa: when the temperature decreases, the substance narrows. A drive reacts to changes in the substance, which regulates the temperature regime with the help of an electrical circuit.

Mechanical thermostats

Mechanical type regulators are characterized by the absence of electronic filling. The principle of operation of such thermostats is based on the ability of materials to change their properties under the influence of temperature. As a result of a change in the temperature regime of the substance in the gas membrane, the electrical circuit closes or breaks, which activates certain mechanisms of the equipment.

Boiler control

A room thermostat for a gas boiler (or any other) can be controlled mechanically or automatically. The degree of heating of the room is directly affected by the temperature of the coolant. As soon as it heats up to the desired condition, the boiler turns off. When the temperature drops, it reconnects. The response threshold differs in different systems, but in general it is 0.25 degrees.

The function of monitoring the operation of heating equipment is performed by the programmer. This device, in addition to the obvious convenience of automating the process, performs another role - it saves fuel. Indeed, in manual mode, the boiler often turns on and off, and the movement of the heat carrier is created by a pump that works even when the heating system is turned off. The consequence of this is an increased consumption of electricity and a shortened life of the equipment.

Note! The room thermostat does not respond to the temperature of the heat carrier, but to the air temperature, as a result of which the number of switching on and off of the boiler is reduced in comparison with manual adjustment. In other words, even if the batteries are already cold, but the air temperature in the room is at an acceptable level, the boiler will not turn on.

Also, the boiler will not turn on in some other situations:

• heating the room with the rays of the sun;
• decrease in temperature delta;
• increase in the number of people in the room, etc.

The practice of using temperature controllers shows that they can save up to a third of thermal energy.

Installation and connection

Installers are advised to install thermostats in living rooms. Their installation in the kitchen, corridor or boiler room leads to disorientation of the system and false positives. It is recommended to opt for the coolest room or where there are the most people.

Heat sources - radiators or heaters - should not be located near the thermostat. The device must not be exposed to direct sunlight. It is necessary to avoid placing the thermostat in a draft. Also undesirable is the proximity to electrical appliances that emit thermal noise.

The boiler is switched on and off by a special relay. The thermostat is connected using a terminal on the boiler at a predetermined location or via a thermostat cable. Batteries are required to operate the programmer.

Before connecting the room thermostat, you need to read the instructions that are in the data sheet of the device. Usually in the passport there is a separate section dedicated to connecting the thermostat.

Setting

The matter is not limited to connecting a room thermostat - it needs to be adjusted. On the programmer panel there are microswitches and keys, by pressing which you can carry out the entire setting.

Microswitches can be adjusted:

• air heating and cooling;
• sensor response interval (this will avoid triggering from drafts or short-term opening of doors to the balcony in winter);
• temperature fluctuation mode (for example, if you set 1 degree, the regulator will turn off the boiler when it rises by half a degree and turn on the equipment when it drops by the same half a degree).

The keys determine the optimal and economical temperature regime. The optimum will be maintained during the day, and at night the temperature will drop, remaining at a comfortable level, but providing fuel economy. The thermostats have pre-installed programs, among which the user can choose those that seem more suitable to him.

If you decide to buy a mechanical, electronic or electromechanical room thermostat for the boiler, it is advisable to adhere to the following recommendations:

1. It is worth choosing a thermostat of the same company that produced the boiler. This will make it more compatible and easier to install.
2. When buying a device, you should take into account the area of ​​\u200b\u200bthe room and the desired temperature regime.
3. To reduce heat loss, it is necessary to conduct thermal insulation of the room.

To reduce heat loss, it is necessary to carry out thermal insulation of the room

Conclusion

The thermostat is one of the important components of the heating system. Despite the simplicity of the device, this device will provide comfortable control of the system, save the homeowner a lot of money and extend the life of the equipment. Installation of such a device is possible both with the help of specialists and with your own hands.

Due to the ever-increasing energy costs, the demand for energy saving measures is growing along the way. Let's take a closer look at one of them - installing a thermostat for a heating boiler or thermostat.

Given the rise in energy prices, the issue of energy conservation is extremely acute. That is why a large number of models of heating devices that consume fuel economically have been developed. However, the equipment itself is not enough. The most rational use of energy resources will help the thermostat for the heating boiler (thermostat), which allows you to control and maintain the set air temperature in the heated room.

Energy management

• Purpose of thermostats for heating boilers
• Scheme of connecting the thermostat to the heating boiler

Purpose of thermostats for heating boilers

To be able to control the energy consumption of heating equipment, it is equipped with special devices - thermostats. These devices allow you to use fuel efficiently by turning off the equipment when the set temperature level is reached. Thermoregulators are used for electric boilers, gas and solid fuel boilers, as well as convectors, heaters and other heating systems.

To achieve economical operation of the heating boiler, the thermostat turns on the equipment when the temperature drops below the set temperature and turns it off when the set value is reached. This method allows you to avoid unreasonable consumption of gas or electricity, when, for example, some of the rooms are located on the sunny side and less heat is needed to heat them than for other rooms.

Useful advice! Even a slight decrease in temperature within 1 degree helps to reduce energy consumption by 4-6%.

In addition, with the help of thermostats, you can set the operating mode of the heating system, in which the temperature in the absence of people in the house or at night will be 4-5 ° C lower. Thanks to this, savings in electricity or gas consumption of about 30% can be achieved. Thus, if your heating equipment does not have such a built-in device, it would be advisable to buy a thermostat for a heating boiler. The temperature controller will provide a solution to the problem of energy overruns.

Types of thermostats for heating boilers

Equipping heating equipment with thermostats allows you to maintain a given temperature climate in the room with an accuracy of 1 to 0.5 degrees. They control the operation of the heating system using various actuators. There are electromechanical and electronic thermostats. The design of a mechanical thermostat for a heating boiler has an on / off key and a rotary button to control the temperature.

Electronic or programmable thermostats are more advanced, but simple and straightforward to use. With their help, you can set the daily temperature cycle: in this case, the boiler will automatically switch to the specified mode. Such devices can regulate both the entire heating system and individual heating units.

There is a classification of devices into wired and remote-controlled. For the former, the connection of conductors is important, as well as external protection against mechanical damage. The quality of the signal supplied from the boiler to the controller, which informs about the flow of coolant into the circuit, depends on this. During installation, the question may arise of how to mask the signal line so that it is invisible.

In the wireless thermostat for the boiler, control is carried out by transmitting a radio signal. Such a device has two blocks, one of which is mounted in close proximity to the heating boiler, connecting to the equipment terminals. The second node is located indoors. There is a dedicated radio channel between the two blocks. The control unit is equipped with a display and a control keyboard.

Depending on the degree of automation, thermostats can be digital or analog. The operation of digital devices is based on the signal of microcircuits, due to which the device can fix and apply several specified modes. Analog thermostats are controlled manually by means of a mechanical regulator connected to a rheostat.

Thermostat for a heating boiler (thermostat): which one is better to choose

Before you buy a thermostat for the boiler, you need to decide on the type of device. To do this, you need to understand what is the fundamental difference between models of room mechanical thermostats and electronic ones. There is an opinion that the latter are difficult to configure and they are unreliable, but this is not so.

The principle of operation of a mechanical thermostat for a heating boiler
In most cases, mechanical thermostats for heating boilers are used in gas installations. This is due to the fact that manufacturers of gas boilers initially produce devices that are compatible specifically with mechanical models of thermostats. The design of a mechanical thermostat has a gas membrane, inside of which there is a special gas.

When the temperature deviates from the norm, the volume of gas inside the membrane changes and the mechanism for closing or opening the heating boiler power system is triggered, respectively. This is a fairly simple way to control the operation of the boiler, when its operation depends on the temperature indicator not of the coolant, but of the air in the heated room.

Using a mechanical thermostat model, you can set an acceptable temperature by turning a round button with divisions, which is connected to the membrane. Thus, there is an approach or removal of the walls of the membrane to the control device: this is how we set the temperature at which the connection or break of contact will occur.

Useful advice! The simple design of mechanical thermostats for heating boilers allows you to make the device yourself.

Among mechanical devices, Siemens room thermostats have proven themselves well. Models RAA21, RAA31 have a temperature setting range of 8-30°C. Devices with a laconic design are mounted like ordinary switches and do not violate the integrity of the interior line. Easy to install and manage. The estimated price of a room thermostat for a gas boiler is 1500 rubles.

Of the advantages of mechanical thermostats, one can single out low cost, the possibility of repair and resistance to power surges. The disadvantages include the low sensitivity of the device to temperature changes. The inaccuracy can be up to 3°C.

Advantages of electronic wireless thermostats for gas boilers

The use of programmable wireless thermostats for gas boilers makes it possible not only to control the operation of heating devices, but also to do it remotely. Electronic regulation allows you to set different operating modes of the boiler, depending not only on temperature, but also on a certain time of day.

By purchasing a wireless thermostat for a gas boiler with programmable functions, you can count on significant fuel savings. The acquisition of a relatively expensive device justifies itself within two heating seasons.

Modern models of thermostats are equipped with a GSM standard, which allows you to transfer information to a mobile phone via sms. Given the fact that boilers from leading manufacturers support Wi-Fi technology, and their electronic control unit is connected to a thermostat, it is possible to configure the operation of heating equipment via the Internet. Know-how in this area is the development of special applications for smartphones.

Convenient operation system, no need for wires, automatic control of equipment are important advantages in using a wireless room thermostat for a gas boiler. You can buy devices with additional options, such as joint control of the gas burner unit, equipment adjustment depending on the outdoor temperature, system diagnostics and other functions.

Among the shortcomings of programmable room thermostats, one can, perhaps, single out the possible incompatibility of the latter with boilers, depending on their manufacturer. Such a snag appeared due to the large number of manufacturers of electronic equipment and gas heating equipment.

Useful advice! Before you buy a thermostat for a gas boiler, you need to inquire about the compatibility of the device with the model of gas equipment from a specialist in the selling company.

An excellent example for autonomous heating are the models of room thermostats for the Baxi gas boiler. Devices allow you to set the temperature depending on the time of day and season, adjust the temperature in different rooms. In addition, they provide an economical mode of operation of gas equipment. Estimated price of a thermostat for a Baxi heating boiler of the AURATON 2030 RTH model is 6900 rubles.

Functions of room thermostats for gas boilers

Before you buy a room thermostat for a gas boiler of one type or another, you should familiarize yourself with its functionality. It should be noted that when choosing between analog and digital models, the latter have a lot of advantages and, accordingly, their price is higher.

However, the use of a programmable room thermostat for a heating boiler can significantly reduce the frequency of turning on / off the equipment, which has a positive effect on its operation as a whole.

An extremely important feature of the room thermostat for the boiler is the programming function, which makes it possible to set a comfortable microclimate depending on the time of day, weather conditions and other factors. The available timer allows you to set the desired parameters, taking into account the days of the week (working, weekends), the calendar season and other settings. This is very convenient for those who work in shifts or work part-time.

The main advantages of a programmable room thermostat for a gas boiler:

• remote control of the heater;
• the “day / night” setting makes it possible to set an individual level of heating, taking into account a certain time of day;
• ease of control allows you to quickly reconfigure the temperature in the room;

On some models of thermostats, the diagram is shown on the back of the decorative cover. All modern boiler models have connection points for a thermostat that will control the operation of heating equipment. Fixing the device is carried out by means of a terminal on the boiler at the appropriate point or using a thermostat cable (included in the kit).

According to professionals, wireless room thermostats should be installed in living rooms away from existing household electrical equipment (TV, refrigerator, lamps, etc.), since proximity to the heat radiated from them can lead to incorrect operation of the device. Some recommendations for installing a wireless thermostat for a gas boiler:

• for the correct measurement of the temperature in the room, it is necessary to ensure free access of air to the thermostat;
• it is not recommended to cover the devices with furniture or heavy curtains;
• the device should be located in the coolest rooms or in residential areas where residents spend the most time;

• avoid direct sunlight on the device;
• do not mount the device near radiators or heaters;
• the devices must not be located in the draft area.

Useful advice! Room thermostat sensors for heating are triggered when the room temperature changes by 0.25 degrees.

Heating control with a thermostat for a gas boiler

You can control the operation of heating equipment using the manual setting or by means of a thermostat for a gas heating boiler. I would like to note that using manual settings, you can set the temperature of the coolant in the system. Such functioning of the equipment does not react in any way to changes in the air temperature in the room, and if this occurs, you will have to manually reconfigure the boiler again.

The operation of the boiler in the case of manual control is associated with frequent switching on and off of the equipment, as well as the operation of the circulation pump, regardless of whether the unit is in operating or standby mode. This causes heating equipment to wear out quickly and does not contribute to efficient fuel consumption.

If we are talking about control using a thermostat for a gas boiler, then such a device sets the optimal mode for the unit, taking into account the air temperature in the heated room. If, for example, there was a sharp warming and the room received additional heat from the sun's rays, the thermostat will instantly react and give a signal to the control device to turn off the boiler.

Considering that with the help of a thermostat (temperature controller) for a gas boiler, you can set the required temperature in the room, heating will be carried out only if it is lowered. Thus, if the device is set to 20 ° C, and during the day the room warms up also due to solar heat or the operation of cooking appliances, the boiler will be in the waiting state for a long time.

In this case, fuel consumption will be significantly lower. Before you buy a thermostat for a gas heating boiler, you should ask how to properly configure the device.

Setting the thermostat (temperature controller) for the heating boiler

After you buy a thermostat for a heating boiler and connect it to heating equipment, it will need to be configured. Each product comes with an instruction manual that explains how to set it up. Having carefully studied it, you can independently set the necessary mode that meets the individual level of microclimate comfort.

On the external panel of the device there are buttons and switches, through which the setting is carried out. The switches allow you to control the heating and air conditioning, start delay (does not allow the boiler to start when the temperature drops for a short time, for example, a draft) and temperature deviation (if you set the fluctuation value to 1 ° C, then switching on or off will be available when the temperature rises or falls by 0.5 degrees).

By means of buttons two modes are set: optimum and economical. Thus, during the day the temperature will be at the optimum value, at night the temperature will drop to a level sufficient for a pleasant sleep. This mode will significantly save on energy resources. Various models of thermostats have several preset modes, one of which can be selected for use.

Useful advice! In rooms where children and the elderly are most often present, it is recommended not to lower the temperature below 22°C.

Temperature controllers for electric heating boilers: how to choose a device

In places where gas supply is not available, electric boilers are used for space heating. Among the advantages of such equipment, there is no need for a chimney device, ease of installation, environmental friendliness, quiet operation, high performance and equipment with a control unit for functioning in automatic mode.

The disadvantages of electric heating include one, but quite a significant drawback - a significant consumption of electricity. This leads to the high cost of electrical heating systems. Installing a thermostat for an electric heating boiler will reduce energy costs by 20 to 30% and set up an individual heating mode for each room.

As with other types of heating equipment, it is possible to use an electronic or mechanical room thermostat for electric boilers. The type of device is selected depending on what options are needed in your particular case. Mechanical models are simple and inexpensive, but may not work accurately. Electronic programmers are accurate, multifunctional and allow the equipment to operate in an economical mode without the intervention of the owner.

Before you buy a thermostat for an electric boiler, you need to decide on the temperature regime used and take into account the area of ​​\u200b\u200bthe heated room. It is recommended that the purchased thermostat and electric boiler be produced by the same manufacturer. Models manufactured by Baxi, Ariston, Salus Controls ltd, BOSH and others are popular.

Useful advice! A voltage stabilizer will help to ensure uninterrupted operation of the electric boiler and electronic thermostat in case of possible voltage drops in the network.

Where to buy thermostats for heating boilers

You can buy thermostats for gas boilers, electric and solid fuel heating equipment at specialized points for the sale of heating equipment, as well as on websites and online stores selling elements of heating systems. The catalogs contain a huge selection of modern thermostats of various types from leading manufacturers. All devices come with a manufacturer's warranty.

The product range includes wired and wireless models, mechanical and electronic thermostats for solid fuel boilers, gas, electric and diesel installations, as well as convectors, infrared heaters and underfloor heating systems. All products from the catalog have quality certificates.

The advantage of online shopping is also that it is possible to get acquainted with the cost of devices in different companies and make a comparative review of prices. By choosing a thermostat, you can get competent advice on its installation, connection and configuration. Some companies offer installation and commissioning services for the device. All questions you are interested in can be clarified by phone numbers placed in the contact section. published

If you have any questions on this topic, ask them to specialists and readers of our project.

To prevent overheating and high loads on boiler equipment, special devices are installed. These are thermostats for gas boilers. In today's article, we will try to tell you in detail about this part, as well as consider its design and purpose.

What is it for?

During operation, the boiler heats the water in the system, after which it moves through the radiators. And if the pressure level of the liquid or its temperature exceeds the norm, after a while an accident will occur in the system. So, in order for the system not to be subjected to frequent overheating, it is understaffed with thermostats. Often, several parts are used in a room. Temperature controllers for gas boilers are mounted at their outlet, as well as on each battery. This is necessary in order to control the heating temperature of the liquid.

It is worth noting that gas equipment is a subject of increased danger. If used incorrectly, burners cannot burn fuel properly, which causes gas to fill the combustion chamber, increasing the risk of explosions and fires. As a result, the boiler overheats, and the water in the system is converted into steam (in this case, the pressure on the pipes increases significantly). Of course, modern boilers are able to turn off during significant overheating, since special sensors are provided in their design. But, as practice has shown, when the temperature rises too quickly and somewhere far from the heating element, they are not able to respond to these changes in time. As a result, the system overheats. Under such circumstances, only a local fuse helps, that is, a thermostat for a gas boiler. It gives a signal in a matter of seconds, so you don't have to worry about the risk of overheating the system.

Design and principle of operation

What are these elements made of? The thermostat (including for the AOGV gas boiler) consists of several strips of metal. The latter have different coefficients of linear expansion. These strips work as an electrical switch contact in the heating circuit. Due to the difference in the coefficient of the two metals, they are deformed, after which the chain is broken. The steel strips are in contact with the valve closing mechanism. When the temperature rises above the nominal value, the contact goes down. Further, at the level of the valve, access to water, steam and gas is blocked. Thus, the operation of the boiler stops, and the radiators cool down naturally, exchanging heat with the air in the room.

What happens next? After the steam / water temperature drops to normal, the thermostat will open the valves and restart the boiler. It should be noted that frequent overheating of the system may damage the design of valves and fuses. Therefore, after each such situation, it is necessary to check the integrity of important mechanisms.

As you can see, a remote thermostat for a gas boiler has the same principle of operation as a car thermostat - as soon as the temperature rises, a special valve opens in the system and the liquid is pumped in a large circle. True, in the case of a car, the sensor is not able to turn off the internal combustion engine.

Varieties

When buying this element, it is important to take into account a number of parameters and characteristics of the particular heating system that is used in your room. Below we will consider which thermostats for gas boilers exist and how each of these types is characterized.

Indoor

This type of thermostat works exclusively with free air flow. That is, there should not be any elements blocking air circulation near it. It can be a curtain, a closet or other furniture located next to a heat source (radiator). This is the most popular thermostat for a gas boiler (including Beretta). These devices can also be used for heated towel rails.

The room thermostat is a device that regulates the operation of the heating boiler depending on the current room temperature. That is, the sensor does not work taking into account the heating of water in the tubes. In this way:

• The heater (in our case it is a gas boiler) in the absence of an installed thermostat turns on and off depending on the water temperature.
• A heater with a room thermostat operates depending on the heating of the air in the room.

That is why thermostats for gas boilers are not recommended to be covered with any decorative covers, forced with furniture and other things. By the way, this type of device is equipped with a convenient digital display and can be programmed at the touch of a button.

TRV

This abbreviation hides a special type of elements - thermostatic valves. These devices do not directly control the boiler. By their structure, they only reduce the flow of water through the battery, and only if the temperature rises above normal. Most often, expansion valves are mounted in places where the level of water pressure is the lowest. of this type, as well as room ones, it is not recommended to install under covers and other design devices. The fact is that if there is a violation of the air circulation in the room, the device will not measure the exact level of heating of the system, and accordingly, it will be useless in your home.

Remote controllers

Experts recommend installing zone remote controllers together with these devices. These devices will help control the air temperature in a room or in a separate section of the room using infrared rays. As soon as the system begins to boil, the sensors will send a signal to the boiler or regulator valve, after which the heater will stop working.

Cylinder thermostat

This type of device is recommended to be installed if a 2-circuit boiler is installed in the room. At the outlet of the system, water reaches very high temperatures (more than 80 degrees), and in order to prevent pipe deformation and leakage, such liquid regulators are mounted before passing to the battery. It is worth noting that the cylinder thermostat is fully programmable. This means that the owner can independently set the temperature at which the boiler will turn off for a certain time. Most of these regulators are adjusted in the range of 60 degrees Celsius.

"Smart" thermostats for gas boilers

These devices, in their principle of operation, are very similar to direct-acting water regulators. They also monitor the state of the system and, if necessary, turn off the boiler until the liquid temperature stabilizes. In addition, "smart" thermostats are able to turn off boiler equipment, also controlling the amount of hot water pumped through the pipes. In the event of an emergency, the electronics react quickly and close the valves in the system. This type of device can be both digital and electronic. The latter consist of several components - a display, a board and contacts.

How to install correctly?

Judging by the reviews, for a gas boiler it is quite possible to install it indoors with your own hands. And it doesn’t matter if the device is mounted on metal, cast iron or aluminum batteries - the whole process is similar and requires a minimum of tools.

So, how to properly turn on the regulator in the heating system? The first step is to drain the water from the pipes. So we will discharge the central heating system. Most often, this requires opening one valve located at the water inlet to the system. Next, the pipes are purged, and the adapter is unscrewed. How to do it? In order to disable the adapter, you need to perform several manipulations.

1. Put a lot of pieces of rags. It can be rags or towels. It is important that they all consist of terry or cotton - this way more water will be absorbed into them. Alternatively, you can use an ordinary sheet of paper or cardboard.
2. Press the old valve body with an adjustable wrench. The second wrench is needed to loosen the nuts that hold the valve to the pipe and adapter. Then we boldly remove the mechanism from the radiator. In some cases, it is necessary to use a battery valve that is built into the radiator.

The next step is to mount the new device. Before installation, it is important to thoroughly clean the internal threads. A piece of clean cloth is best for this. After the thread is wrapped with a special locking tape (white stripe) clockwise. It is recommended to smooth it after each new turn. Next, the screw element is connected to the corner gaskets.

When installing, the blind nut should be replaced, as well as the old steel collar made of copper pipe. If the latter does not slip off, carefully and accurately cut out its parts and tear them apart with a compact screwdriver.

After the thermostat for the gas boiler is installed (you can see a photo of the finished element in working condition below), you need to tighten the nut, which is located between the adapter and the valve. The latter should be held with an adjustable wrench. It is important not to overtighten the threads, otherwise the system may depressurize.

Next is the installation of a spare protection system. To do this, the pipes are filled with water again. After the system is completely filled with fluid, check all connections for leaks. If the valve is located in a large room (for example, a living room), it is left completely open. In the case of a small room (kitchen or nursery), you need to close it halfway.

Baxi boilers are an excellent choice for autonomous heating systems. They are distinguished by increased comfort, a variety of automation and ease of use. Any additional equipment can be connected to the boiler. An example is programmers, or room thermostats for Baxi gas boilers.

Advantages of Baxi boilers

Main 24 Fi 24 kW

The advantages of Baxi gas boilers are obvious, and the possibilities of such units are multifaceted. We list only the main advantages of such boiler equipment:

• Ability to connect additional elements, sensors and automation systems.
• The ability to automatically change the temperature regimes depending on the temperature delta in the street and at home.
• Economy of operation.
• "Smart" self-diagnostic systems.
• The possibility of using the unit not only in traditional heating networks, but also in the "warm floor" system.

Additional accessories

Note! Most models are equipped as standard with built-in electronics, control systems and various sensors. Installing optional accessories makes operation easier, more convenient and more efficient.

Optional accessories open up a whole range of possibilities for equipment control:

• Temperature control by time of day and season.
• Setting the temperature in different rooms.
• Work in economy mode.

All this reduces gas consumption, which means it makes the system energy efficient and its operation economical. Paradoxically, most consumers refuse to install additional equipment for reasons of economy. Of course, the installation of these devices will increase the cost of the system. But on the other hand, it will save on heating bills.

The installation of additional devices pays off already in the first two heating seasons. So accessories for Baxi gas boilers are not only additional comfort, but also significant fuel savings.

Variety of accessories

There are a lot of accessories and additional equipment for Baxi boilers on the market. We list the main ones:

Clear display

• Digital timer. The device allows you to program the work of engineering networks for a certain period. When using it, the boiler will turn on / off at the time specified by the consumer. You can use this device not only for programming heating, but also for boilers.
• Room thermostat, or thermostat. This device maintains the set temperature and allows you to control the microclimate. The boiler equipped with a programmer will operate in automatic mode. In this case, no intervention on the part of the consumer in the operation of the unit is required.
• Outdoor temperature sensor. To maintain heat in the house, it is necessary to take into account the temperature of the street air. The power with which the boiler must operate directly depends on the delta (difference) of room and street temperatures. The outside temperature sensor allows you to maintain a constant mode, no matter what the weather is outside the window.
• Room temperature sensor. It is recommended to install it together with the above device. Both devices, working in pairs, guarantee the so-called self-adaptation of the boiler.
• Digital control panel. This is a real highlight. You can install it in a convenient place. With its help, not only control, but also system diagnostics takes place. This device can be used with or without a programmer.

These are not all accessories that can be connected to Baxi indoor gas boilers. In more detail, you should dwell on the most common device - a thermostat, or temperature controller.

Why do you need a thermostat?

Suitable thermostat

In fact, the thermostat is a device that allows you to regulate the temperature in the room in automatic mode. It can be argued that it is easy to regulate the operating modes of the boiler without automation, that is, manually. At the same time, the thermostat becomes an unnecessary luxury, entailing extra costs. Consider the pros and cons of installing such accessories.

During the operation of gas boilers, the regulation of the microclimate in the premises is carried out by changing the temperature of the coolant. When the set value is reached, the boiler turns off, and when it decreases, it turns on again. When outside temperatures change, it is necessary to change the parameters of the heating system, and this must be done manually. As a result of interference with the operation of boiler equipment, they are required throughout the entire heating season.

The time and attention taken by the boiler when manually adjusting its operation are not the most important problems. In this mode, frequent starts / shutdowns of the boiler occur, which does not have the best effect on its performance, and on the reliability of the system as a whole. There is one more problem. When the boiler is in constant on / off mode, the circulation pump continues to function. Being an energy consumer, it increases the cost of electricity, which increases the financial costs of heating. Not to mention the negative impact on the operation of the system.

As you can see, manual control for a high-tech gas boiler is not the best option. Now consider what the thermostat can change. The device has room temperature sensors that monitor the temperature not of the water in the system, but of the air in the premises. As a result, the boiler is turned on / off when there is a deviation from the set temperature regime, and not when the water heating decreases.

The frequency of starts/shutdowns is significantly reduced. When programming the device, you can set the optimal threshold for triggering such a sensor. In addition, you can set the delay time for turning on or off the boiler when the sensors are triggered. This will minimize the likelihood of starting the heater in case of a short-term decrease in temperature, for example, as a result of a draft.

Model TAM011MI Seitron

As practice shows, installing a programmer saves 25-30% of energy. The device does not allow excessive fuel consumption. When the boiler is turned off, the circulation pump is automatically turned off, which saves energy. All this speaks in favor of installing room thermostats.

The payback of such accessories is beyond doubt. There are various models of thermostats on the market, differing not only in technical parameters, but also in price. Finding the right accessory is not difficult. Examples include TAM0 11MI, Menred RTC 70, Raychem TE Basic, DEVIreg Touch, Nest, domestic MCS 300, etc. temperature controllers.

Central thermostat

This type of programmer is installed in the house and connected to the heater either by wires or via wireless networks. The latter are more expensive, but more convenient and efficient.

The main advantage of wireless thermostats is the ability to install them anywhere. At the same time, they do not violate the interior, and their installation does not require any complex fixtures or destruction of building structures. The case is fastened with self-tapping screws, after which all the necessary electronics are connected, and the necessary parameters are set. This device can be operated remotely. Its operation is allowed not only with gas, but also with solid fuel boilers.

Installation rules

Room regulator

Installation of central thermostats is simple. But it is necessary to adhere to several rules in order not to violate the efficiency of the system in the future:

• The regulator is mounted in such a way as to ensure free air flow.
• Nearby there should be no household electrical appliances, lamps, touch switches, additional heaters, etc.
• The thermostat must be freely accessible.

Additional options

The main function of thermostats is temperature control. For greater efficiency, the devices have additional options:

• The ability to turn off the heating for several hours, for example, in the long-term absence of people in the house.
• Possibility of temporary change of all programmed modes of operation.
• The ability to change the temperature regime on certain days.

The benefits of installing a thermostat are obvious. The payback of devices is also not in doubt. Nevertheless, the desire to save on the installation of such a useful device is still strong. This often encourages homemade "homemade" to do everything with their own hands. And not just to install the device yourself, but also to assemble it from improvised materials.

Installation process

Theoretically, it is possible to make a thermostat with your own hands. This will require a thermistor that reduces resistance when heated. Then another resistor is connected to the network, with the help of which temperature programming will be carried out. The 2I-NOT element will operate in inverter mode, and voltage will be supplied to it. A capacitor is connected to it and to the trigger. To control the relay, the galvanic isolation on the triac is enhanced. The device can be made both on a mole rat and on a printed circuit board.

Using such a simple circuit, you can assemble a thermostat for almost any boiler. But is it worth interfering with the operation of high-tech equipment? It's up to the owner of the house to decide. Experts do not advise experimenting with home-made devices, especially since you can pick up accessories for any boiler on the market.

In order not to make a mistake in choosing a programmer and purchase a suitable model, it is enough to follow the simple advice of experts:

Features of choice

• It is desirable that the boiler and its accessories are made by the same manufacturer.
• Powerful models of heating equipment can be operated with any version of programmers.
• Before buying, it is worth calculating the necessary technical parameters, otherwise there is a high probability of equipment downtime.
• If it is necessary to install a device of a high power class, it may be necessary to change the wiring, so it is better to consult a specialist.

Any doubts left? You can always buy a cheap model with a minimum set of features and options. Its operation will clearly show how expedient the installation of expensive additional accessories is.

Conclusion

Additional accessories for Baxi gas boilers are not a luxury, but an opportunity to make the heating system energy efficient in the full sense of the word. Installing only one room thermostat can reduce heating costs by about 25-30%.

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