Water temperature switch for the boiler. Thermostat for the boiler - the automation will take care of a comfortable temperature in the home! What are room thermostats for?

It is usually difficult to maintain the same temperature in a room, so a temperature controller for a heating boiler helps to combat this problem. Everyone has come across a situation when it is very cold at home in the morning, and in the evening, because of the stuffiness, you really want to open the windows.

The thermostat controls the temperature and creates comfort in the room. Its main advantage is savings in energy and fuel costs. Also, thanks to the device, heating equipment gets a longer service life.

The thermostat contains a sensor that sends information to the boiler about the required air temperature. In this article we will talk about the temperature regulators of the heating boiler, its types, principles of operation and the main advantages.

A room thermostat allows you to automate combustion processes and transfer energy to heating radiators. And also this device minimizes the risk of accidents that are associated with a sharp increase in temperature in boilers.

A room thermostat for a solid fuel boiler makes it possible to make heating most suitable for residents of a house or apartment. If the temperature in the rooms is comfortable, the boiler simply will not start up. Programmable electronic room thermostat for easy setting of heating equipment.

You can set the desired temperature for any period. If the owners are not at home from 7 a.m. to 4 p.m. to 5 p.m., then you can set the temperature for this period using the thermostat to about 15-16 degrees, and for the rest of the time - 23 degrees. This approach allows you to effectively save electricity and the boiler resource itself.

If the room thermostat is installed in a country house that you visit only on weekends, set the temperature from Friday to Monday morning. The device will not work for the rest of the week.

Overhead room thermostats for boilers are very convenient due to their miniature size. It easily locks onto and controls its temperature, controls heating devices. If you want to optimize heat costs, the purchase of this equipment will be very useful.

The thermostat for a gas boiler is a compact device equipped with a user-friendly interface in order to set the required temperature mode. Any thermostat for a boiler is equipped with a temperature sensor and has terminals for connection to the boiler.

Thermostat for a boiler is a shut-off and control valve for automatic regulation of the boiler, corresponding to the air temperature set by the consumer.

The thermostat has a built-in temperature sensor, which is installed in an area free from the direct influence of heating devices and provides the thermostat with information about the air temperature in the area where the temperature sensor is located. Based on this data, the thermostat controls the boiler in the room.

appointment;
installation method (installation);
types of used temperature sensors;
functionality (programming, remote control).

It is recommended to install thermostats in the same room where heated floors are installed, except for rooms with high humidity) and place them in a convenient place on the wall in the immediate vicinity of light switches and sockets.

If you are a lover of various novelties, modern devices and simply stylish things, then you should pay attention to the Salus thermostats. For connoisseurs of the European manufacturer, who are usually famous for their functionality and reliability, we recommend paying attention to the Auraton room thermostats.

If your main goal is to buy an inexpensive thermostat with a weekly cycle, then the Computherm programmer is ideal.

wired - the regulator is connected to the controller via a wired connection;
wireless - regulate the process of heating the house from a radio signal.

simple;
programmable;
with hydrostat function.

Simple devices are only able to maintain a stable set temperature in the room, do not have a direct effect on reducing gas consumption.

remote control of boiler operation parameters;
installation and adjustment of day and night modes of equipment operation;
programming the operation of the heating system on days of the week;
significant reduction in fuel consumption.

The hydrostat function allows you to control the humidity in the premises, reduce or increase it, depending on the preferences and desires of the owner.

Wired devices are distinguished by their reliability and simplicity of design, low cost, and long service life. A thermostat for a heating boiler of this type is able to maintain only one temperature regime, which is set by changing the position of the handle located on the front side. On most devices, the range of possible temperatures is 10-30 ° C.

Depending on the brand, the room thermostat can be connected to the power supply from the mains, directly from the boiler controller or from the battery.

The main disadvantage of this type of device is that it is possible to set only one temperature value. To change it, you need to reinstall the handle to a different position.

In addition, certain inconveniences are caused by cable laying, therefore it is better to install a wired thermostat to a gas boiler during finishing work and installation of the heating system.

If the heating system is already installed, it is more convenient to install a wireless programmable thermostat for a gas boiler, the installation of which will not violate the aesthetics of the interior.

The wireless thermostat for gas boilers consists of two units. One of them is placed at the heater and connected to the gas valve or controller using terminals. Another is installed in the room from which it is planned to monitor the operation of the boiler equipment.

Communication between the blocks is carried out over a radio channel. The control unit is equipped with a miniature keyboard and a small LCD display for ease of use.

A wireless temperature controller for a heating boiler is installed simply and quickly, does not require any significant costs for the purchase of fasteners.

A significant drawback of devices of this type is the limited battery life, which must be changed periodically. When the device is disconnected from the power supply, the sensors will no longer transmit a signal to the heating boiler, which will be guided only by the readings of its meters and excessively heat the coolant.

All modern thermostats for heating boilers, powered by batteries, have a warning function about the state of charge of the batteries. A room thermostat for a gas boiler allows you to fully automate the heating control process.

Wireless programmers will facilitate the control of heating devices located in hard-to-reach places. You do not have to pull a pile of wires to a convenient location for the temperature sensor. The wireless boiler thermostat consists of two modules that work by radio.

A wireless room thermostat is indispensable when all the decoration in the room has already been completed and it is not possible to lay a cable from the thermostat to the heating boiler or the "comb" of the underfloor heating control.

In this case, the wireless thermostat is installed in a room whose temperature needs to be controlled, and the receiver, as a rule, is placed in the immediate vicinity of a heating boiler (gas or electric), thermoelectric actuator, or other devices for regulating the heating system.

The transmission of control commands between the thermostat and the receiver is carried out via a radio frequency channel at a frequency of 433.92 MHz or 868 MHz. Thanks to the individual coding of the signal in each thermostat-receiver pair, reliable interference-free communication is ensured.

The thermostat is powered by 2 AA batteries. The service life of one set of batteries is approximately 12 months, depending on the communication range and the presence of obstacles between the thermostat and receiver. The receiver is powered from a 220 V network and has powerful switching relay contacts designed for loads up to 3000 W (depending on the model).

The working part is mounted directly near the boiler and is connected to its terminals with a special cable.
The second element is a display tracker. It is usually installed in a heated room. The sensor can be equipped with a touch screen or a push-button screen. These nuances affect the cost of the device.

The devices "communicate" with each other using a radio channel that does not affect other electronic devices in the house (the latter also do not affect wireless room thermostats for gas boilers or for any others).

They can be conditionally divided into simple and complex. The first includes, for example, a wireless thermostat for a gas boiler, the function of which is to turn off or supply gas, depending on whether the air temperature in the room has risen or dropped. They are relatively inexpensive, but they also have only two functions: turning the unit on or off.

More sophisticated wireless thermostats, both for gas boilers and for all other types of heating equipment, are equipped with a program that allows you to make weekly settings with hourly changes in air parameters.

As a rule, these models are volatile and operate either on batteries or on rechargeable batteries that need to be recharged. If you have a long trip, then it is worth taking care in advance to ensure that the supply of batteries is sufficient for the entire period of absence.

Advantages of wireless thermostats

A room thermostat in a gas boiler circuit precisely regulates the temperature and reduces energy consumption. Besides, it works in automatic mode - there is no need for manual settings.

Accurate and fast temperature control. The alignment accuracy is 0.3 degrees.
Day-night modes, functions of setting temperatures by time intervals for several days in advance.
Connecting a GSM module or a control system via Wi-Fi further reduces the need for human participation in boiler control.
Air temperature regulation in different rooms.
Economical operation of gas equipment. A thermostat costs money, but pays off by reducing overall heating costs, including electricity, by 20-25%. The fact is that when the boiler is turned off, the automation turns off the pump, which is its consumer.

Payback is achieved in two seasons of operation. A reduction in the number of starts / shutdowns leads to a saving in the resource of a gas boiler, the cost of which exceeds the price of additional equipment. Programmable devices regulate the threshold of the temperature sensor.

And the use changes the delay time for turning on / off the gas boiler, which minimizes the likelihood of automatic operation during short-term temperature fluctuations, for example, due to a draft.

A modern wireless thermostat with an ergonomic design, it fits easily into any interior design. Installation does not require wiring, which is convenient when designing a system in old houses.

The only drawback is that the thermostat and the boiler can work together efficiently, often if they are made by the same manufacturer. Differences in electronics sometimes make devices from different manufacturers incompatible.

Although these types of devices are the easiest to operate, they are no less high-quality and efficient in operation than expensive electronic counterparts.

The main field of application for mechanical devices is thermostats for wood-fired heating boilers or other solid fuels, but they can also be installed on equipment that fired with gas. Depending on the brand of the boiler, they can be mounted both horizontally and vertically, which does not affect their efficiency.

Devices based on a bellows filled with a liquid or gas that is sensitive to changes in air temperature. Their task is to shut off the supply of the media into the system if the indicators become higher than the specified ones, and to let it through when the batteries have cooled down, and with them the air.
Temperature regulator for solid fuel boilers, based on a bimetallic plate that bends when the temperature rises, and shuts off the supply of electricity to the heater, and reconnects it to the network when it decreases, and it straightens.

low cost;
long service life;
they are subject to repair in case of breakdown;
well tolerate voltage drops in the network.

Manual setting is never accurate, so you should expect that the difference between the set temperature range can be 2-3 degrees with real air heating.
Each time when external factors change, such as warming or cooling, the presence of sunny weather or lack of it, either you have to endure the heat in the first case, or a cold snap in the second, or manually make adjustments.
The temperature range for mechanical devices is limited and there is no adjustment function for the time of day and days of the week.

If the question is to buy, an electronic or mechanical thermostat for a boiler, then it should be noted that, in addition to the difference in price, the former have significant advantages in tinctures and in the way they are controlled.

A thermostat for an electric heating boiler, regardless of its principle of operation, is equipment that is capable of controlling the operation of a heating element, depending on the temperature of the coolant in the heating system of the house or on the ambient temperature.

In a simplified way, the scheme of operation of any thermostat can be represented as follows: on the equipment panel, the user sets the required temperature range for either the coolant in the heating circuit or the air in the room. The thermostat switches on the boiler.

The latter works until the temperature of the coolant or air reaches the specified upper limit. Then the thermostat switches off the boiler heating element. Heating is automatically turned on when the room temperature does not fall below the limit specified on the thermostat.

As a result, such automation for electric heating boilers without constant human control is capable of maintaining the desired microclimate in the house and allows rational use of the energy carrier.

The thermostat for heating can be mechanical and electronic, wired and wireless. The price varies depending on the type of equipment. Each type of thermostat has its own advantages and disadvantages.

The block-by-block principle of the regulation system is shown in the figure:

To better maintain the microclimate in the premises, sensors that monitor the air temperature in the room help. It is customary to call them thermostats and add the word "air".

Thus, it turns out that the thermostat simply maintains the coolant temperature in a certain range, and the thermostat works more accurately, stabilizing the room microclimate.

If the air in the room is additionally heated by some sources, for example, by the sun's rays through the glass of windows or from the heat of operating electrical appliances, the thermostat will not quickly sense these factors, and the thermostat will react quickly, saving energy and equipment resource.

by wire;
using radio waves.

They all need power supply. The former are supplied with electricity using the power supplies of the circuit, and the latter are powered by built-in batteries or accumulators.

To save their energy, intermittent mode is often used, when the air thermostat takes measurements for fractions of a second and transfers them to the logic block, and then turns off for a few minutes. The following measurements are repeated in a similar cycle.

additional appliances often work in the kitchen, emitting heat, which will be taken into account by the thermostat;
when heated, air masses rise to the ceiling, and near the floor the temperature decreases;
when the vents are opened, heat exchange with the street begins;
isolation of the thermostat from natural air circulation disrupts the operation of the automation;
frequent use of the door can affect the mechanical contacts of the sensor in the vicinity.

individual models allow you to set the temperature regime in the rooms, depending on the time of day (during working hours, comfort is created, and at night - savings) and the day of the week;
availability of the "frost protection temperature" mode;
installation of protection against loss of communication between the receiver and the transmitter, when the boiler control switches to the mode of “memory of switching cycles” for the last 24 hours;
the function of accounting for the operation of heating equipment, as on separate electric meters;
use of potential-free executive contacts;
increased communication range between transmitter and receiver;
protection of radio channels from interference;
touch control;
the presence of a program output timer for a period from one hour to several months for setting your own settings. This is convenient to use when you are away from the premises for a long time, for example, when traveling on business trips or vacation.

Many world famous manufacturers are engaged in the production of thermostats and air thermostats for electric boilers.

BOSCH;
Ariston;
SALUS Controls Ltd;
Viessmann;
Vaillant;
Ferolli;
Baxi;
Beretta;
Alpha Calor.

When choosing a temperature control scheme, a thermal sensor should be selected for the specific conditions of its operation, taking into account the needs of the consumer.

Room temperature sensor for gas boiler

On a large living space, it is advisable to use weather-dependent automation. Under such conditions, the function of replenishing heat losses is assigned to the boiler.

Outside the room, a special remote sensor is installed, according to which the boiler operates. To choose the optimal operating mode and correctly configure the equipment, it is better to contact a specialist.

In the absence of special devices, the boiler has to be adjusted manually, focusing on the temperature of the coolant. This is quite inconvenient and completely wasteful. But if you buy a room thermostat and set it up correctly, you can see a number of benefits.

For example, the room is set to the optimal comfortable temperature for living - 22 degrees. The threshold for the most powerful and high-precision thermostats is 0.25 degrees.

As soon as the value set by the user reaches 22.25 degrees, the automatic switches off the heating system and. Until the sensor gives the boiler a signal that the air temperature has dropped to 21.75 degrees, the system will not turn it on. As soon as the signal is received, the boiler starts to heat the room.

The air cools much more slowly than the coolant in the heating system, therefore, using a thermostat, you can reduce the ignition cycle of the boiler and circulation pump. When it's sunny outside and the room warms up by a few degrees from the sun's rays, the heating system saves energy and rests.

Thus, by ordering a room thermostat for gas boilers in an online store or elsewhere, you can even leave in the winter, leaving your home and not worrying about whether it will be warm and comfortable there.

By design, thermostats are divided into types: wireless and with wires for communication with the boiler. The thermostats are installed in a convenient place, the temperature sensor is connected, connected to the boiler control system and used.

Room thermostats need a constant supply of air for proper and proper operation, so they should not be covered with curtains or blocked by furniture. Devices adjacent to an electric thermostat can interfere with the correct operation of the device: lamps, televisions, heating devices located nearby.

Some timers allow you to set different parameters for each day of the week, this can be useful for people working part-time or in shifts. Many Terneo and KChM models are equipped with such thermostats.

The programmable room thermostat allows you to set individual heating standards for every day in accordance with your lifestyle and maintain the temperature of the house all the time, regardless of the presence or departure of the owners.

Connecting the thermostat to the boiler

After choosing a model, a person usually thinks about how to connect a room thermostat to a gas boiler, electric, etc. The launch is carried out in accordance with the recommendations described by the manufacturer in the data sheet for the device. Find the required section in the documentation and look carefully at the diagram.

Professionals agree that installation work should be carried out in residential premises at a distance from electrical equipment, namely TVs, lamps, refrigerators, etc.

In this case, the device is located far from the boiler and is responsible for the "turn on / off" heating function. Unlike previous versions, it sends a signal to the control node. Boilers of modern double-circuit modifications are equipped with expensive thermostats (Russian brand AOGV).

The room unit of the capillary type can be installed separately, fixing it to the wall with screws and connecting the wires.

We connect the neutral.
Wire for powering the boiler. It should link the thermostat and voltage jacks. The process will make it easier to have an anchor.
The box is closed.
Initial temperature parameters are set.
Demanded thermostats of certain brands, for example, Protherm, are controlled by means of a remote control, and the option is typical for boilers of any type.

The thermostat is focused on the degrees, and reacts to the slightest fluctuations. The temperature in the house is usually based only on the system climate microcontroller. The device should be placed in a rarely visited room.

Tips for connecting the thermostat to a gas heating boiler:

In order for the temperature in the room to be measured correctly, it is worth freeing up air access to the programmer.
Do not cover appliances with pieces of furniture.
Install in cool rooms and where residents are most of the time.
It is worth making sure that no direct sunlight falls on the device.
It is not recommended to install in the vicinity of heating radiators or heaters.
It is necessary to protect the devices from drafts.

You can buy everything, and if you wish, you can assemble the thermostat yourself with your own hands. The design does not require rare radio components, but one cannot do without certain knowledge and experience in working with such components.

To begin with, we take into account the fact that automatic devices are prone to self-generation (self-excitation). Therefore, the proximity of the sensor to the device can stimulate it to uncontrolled switching on or off.

These aspects should be taken into account in the scheme of a simple mechanism. The sensor will replace the thermistor, and when it heats up, its resistance will drop. The part is connected to a circuit with a variable resistor, which is responsible for the temperature indicators required for the sensitivity of the thermostat, and a voltage divider.

Device action

At high temperatures, the unit reacts to the operation of the cooling system. In this case, the resistance of the thermistor is negligible. Cooling the air activates its rise, and affects the increase in voltage across the divider.

At maximum resistance, the thermistor turns on, and the process of charging the capacitor begins. The chain reaction is caused by turning on the fan. To get rid of autogeneration, you should resort to using blocks. They will temporarily provide a turn-off delay, and the time interval can be significant.

It is recommended to install the device in the room at 20 degrees.
Night mode should vary within 17-19 C.
Practice convinces of the simple process of assembling the thermostat.

The device is indispensable for owners with autonomous heating. After all, it's easy to buy an irreplaceable part for a couple of hundred rubles, capable of ensuring the safety and functionality of the heating system, than to repair it in the near future. You will be able to control the volume of water supplied to the pipeline and batteries, and save on heating resources.

Automation is used for ease of management, economical consumption of energy resources. To properly use the thermostat for (temperature controller) it is necessary to study modern engineering solutions. An overview of the current market situation will be useful. It is also necessary to assess the possibility of performing installation operations on your own, without resorting to expensive professional services.

Read in the article

Why do you need a thermostat for a heating boiler (temperature controller) in rooms

When developing new heating equipment, great attention is paid to the efficiency of the use of energy resources:

create in such a way that the formation of useful infrared radiation occurs with maximum efficiency.
In gas boilers, continuous flame control systems are installed that optimize the combustion process.
When used, they create chambers of complex shape on the way of removing combustion products. Here the temperature rises further.

But the rational use of electricity and fuel will be useless if the optimal consumption of the generated heat is not ensured. To solve such a problem, certain parameters of individual components are required.

To fulfill the last condition, you will need a heating boiler (temperature controller). With the correct application of this technique, you can get the following advantages at your disposal:

Maintaining the set temperature in automatic mode, without the need for careful control.
Saving energy resources (money) up to 30% and more.
Possibility of remote control, quick transition to special modes.
Extending the service life of boilers due to careful operation.

Note! Optimization of equipment operation using a temperature sensor for a heating boiler will extend the autonomous operation time when the mains power is turned off. The equipment will work from the built-in battery for a long time, which will increase the time for calling specialists, eliminating an emergency.

Functions of the temperature sensor for the heating boiler: regulation of the heating medium temperature

The modern boiler control system consists of several parts:

In this version, the temperature sensors in the rooms and outside air are directly connected to.
Power is provided by the AC adapter. Built-in rechargeable batteries ensure serviceability when 220V is disconnected.
A GSM unit is installed here for remote control. With its help, the user will receive real-time data on the indoor temperature. If desired, it turns on the desired mode by giving a control signal from a smartphone, tablet. These functions are performed under the control of specialized software.
The boiler is commanded over a wired connection. They include heating and pump. This is more economical than the built-in thermostat discussed above. The air temperature decreases more slowly than the heating medium, therefore the burner ignition frequency is reduced. In such conditions, the service life of the equipment is extended.

Important! Boilers compatible with room thermostats must have special “Room Thermostat” input jacks on the control board. The respective capabilities are indicated in the manufacturer's official instructions.

The algorithm of operation of such equipment in the complex deserves high marks. If the sun came out, the temperature outside rises, the boiler will not turn on. It became colder in the room after airing - no need to reconfigure the heating equipment and then set the regulators to their normal position. The required actions will be performed automatically. In just one season, you can recoup your investment. But in any case, a more thorough study of the parameters of equipment and models on the market will be useful.

In order to select the right fittings, consider the need for outdoor temperature sensors. In some models, they are connected directly to the standard electronic control board. With their help, the parameters of inertial processes are optimized.

So if the user has set an excessively high temperature, and it has become warmer outside, they will continue heating even if the boiler is turned off by the thermostat. If there are sensors outdoors, the required command will be given faster. The actual savings in the process of their active use are small. Therefore, these advanced features are valued in conjunction with some added value.

Varieties of technology and selection criteria

For heating boilers (temperature controllers) are equipped with various hardware and software blocks. The following are additional functionalities and technical features of modern models:

Temperature control sensitivity in 0.2-0.3 ° C steps.
Setting of individual time schedules for switching on for each day of the week.
Quick selection of a standard program and creation of algorithms based on personal preferences.
The use of safe ones, in which the formation of sparks during switching is excluded.
Maintaining performance in a wide range of temperatures and.

Some important details are shown in the figures.

How to purchase a temperature sensor for a heating boiler: market overview

Drawing	Brand / Model	Adjustment range, ° C	Minimum actuation step, ° C	price, rub.	Comments
	Salus / Controls RT100	5-30	0,5	880-980	The simplest model, no screen. Suitable for adjustment.
	Thermoval / RTE-E-3502	5-30	0,5	1050-1200	Protection against external influences according to the IP30 standard.
	Thermix / РТ001Н16М	10-40	-	1900-2050	Mechanical control.
	Salus / Controls T105	7-30	0,4	2050-2200	Programmable regulator. Monochrome display with.
	Poer / PTC10	7-32	0,5	2100-2250	The ability to connect to the Internet using an additional set of equipment. Wireless connection between receiver and thermostat. More than 20 programs.
	Salus Controls 091FL	5-30	0,5	2180-2300	User programs, frost protection system.
	Grand Meyer / PST-2	5-35	-	3400-3600	Concealed installation, programmable regulator.
	Warmehaus / Touchscreen	5-35	-	7300-7950	Touchscreen monochrome screen.
	Salus / Controls iT500	5-35	1	10800-11300	Remote control, touch screen, internet connection.

How to connect the thermostat to the boiler

It is more convenient to work with temperature controllers for heating boilers that support a wireless connection. For example, here is the algorithm for installing Salus / Controls iT500:

The controller unit of such a device can be placed in any room at a distance of up to 30-50 meters from the receiver. It is desirable to prevent unwanted external influences on the thermostat. It is fixed on the interior walls, away from, not in direct sunlight. But it is not recommended to install it in niches or other places where the natural circulation of air flows is difficult.
The distance will be less if there are thick reinforced concrete walls, other obstacles to the propagation of radio waves on the corresponding line. Signals are transmitted at a carrier frequency of 868 MHz.
If several kits are mounted on site, you can change the encoding. For this, a DIP switch is used. Let's admit a choice of 32 options. The distance between the receiving units is kept more than 90 cm in order to exclude false alarms.
The Salus / Controls iT500 is designed in a safe design that can be used next to gas equipment.

The previous operations are performed with the 220 V power off.

General conclusion

The use of a wireless thermostat for a gas boiler simplifies the operation of heating equipment. The simplest models are inexpensive. But their installation is associated with the laying of wired communications. Therefore, the total costs can increase significantly compared to the preliminary plan. More complex sets use the radio band to transmit control and pilot signals. The installation of such products is not difficult to carry out on your own. Their high cost is due to their advanced functionality.

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

What is it for?

During operation, the boiler heats up 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, so that the system does not undergo frequent overheating, it is supplemented with thermostats. Often several parts are used indoors. Thermoregulators 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 should be noted 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 explosion and fire. As a result, the boiler overheats, and the water in the system is converted into steam (while the pressure on the pipes increases significantly). Of course, modern boilers are able to shut down in case of 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 react to these changes in time. As a result, the system overheats. In such circumstances, only a local fuse helps, that is, a thermostat for a gas boiler. It beeps in seconds, so you don't have to worry about the risk of overheating the system.

Design and working principle

What are these elements made of? The thermostat (for the gas boiler AOGV including) consists of several metal strips. The latter have different coefficients of linear expansion. These strips act as a 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. Steel strips are in contact with the valve closing mechanism. When the temperature rises above the nominal, the contact drops 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, carrying out heat exchange with the air in the room.

What happens next? After the steam / water temperature has dropped to the normal level, the thermostat will open the valves and resume the boiler operation. Please note 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, the 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 item, it is important to take into account a number of parameters and characteristics of exactly the 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.

Room

This type of thermostat works exclusively with free air flow. That is, there should not be any elements blocking air circulation near it. This could be a curtain, wardrobe, or other furniture located near 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.

A room thermostat is a device that regulates the operation of a heating boiler depending on the current room temperature. That is, the sensor does not work taking into account the heating of the water in the pipes. 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 room air.

That is why it is not recommended to close thermostats for gas boilers with any decorative covers, to force them with furniture and other things. By the way, this type of device is equipped with a convenient digital display and can be programmed by pressing one 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 installed in places where the water pressure level is lowest. this type, like room ones, is not recommended to be installed under covers and other design devices. The fact is that if the air circulation in the room is disturbed, the device will not measure the exact level of heating of the system, therefore, it will be useless in your home.

Remote controllers

Experts recommend installing zone remote controllers together with These devices will help control the air temperature in a room or in a separate area of \u200b\u200bthe room using infrared rays. As soon as the system starts to boil, the sensors transmit 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, the water reaches very high temperatures (more than 80 degrees), and in order to prevent deformation of the pipes and their 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 adjustable from 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 from 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 reacts quickly and closes the valves in the system. This type of device can be both digital and electronic. The latter consist of several components - display, 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 being installed on metal, cast iron or aluminum batteries - the whole process is similar and requires a minimum of tools.

So, how to properly connect the regulator to the heating system? The first step is to drain the water from the pipes. This 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 blown through, and the adapter is unscrewed. How to do it? In order to disconnect the adapter, you need to perform several manipulations.

Put a lot of rags. These can be rags or towels. It is important that they all consist of terry or cotton - this will absorb more water. Alternatively, you can use a plain sheet of paper or cardboard.
Press the old valve body down with an adjustable wrench. A second wrench is needed to loosen the nuts that hold the valve to the pipe and adapter. Then we safely remove the mechanism from the radiator. In some cases it is necessary to use a battery valve that is built into the inside of the radiator.

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

During installation, the blind nut must be replaced, as well as the old steel collar made of copper pipe. If the latter does not slip, carefully and carefully 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 order below), you need to tighten the nut that is located between the adapter and the valve. The latter should be held in place with an adjustable wrench. It is important not to overtighten the threads, otherwise the system may leak.

Next, a spare protection system is installed. For this, the pipes are filled with water again. After the system is completely filled with liquid, check all connections for leaks. If the valve is in a large room (like a living room), leave it completely open. In the case of a small room (kitchen or nursery), you need to close it halfway.

Efficient heating management is a vital part of the efficient operation of a boiler and home heating system. Proper use of controls will reduce the energy consumption of the unit, while creating a comfortable temperature in every room of the house, avoiding overheating of the premises. A thermostat (or a programmer) controls the operation of the boiler depending on the temperature in the room.

Up to 20% of the volume of consumed energy carriers can be saved using this kind of automation. And energy prices are quite high and every normal person wants to reduce their costs.

We consider a situation when the boiler is designed correctly, the necessary insulation of the premises is completed, and the heating system is functioning normally.

Basic types of boilers and temperature control

There are several types of boilers: solid fuel, gas, electric and liquid fuel.

Boilers are widely used all over the world. There are domestic samples, there are boilers and imported ones. The material of manufacture is steel or cast iron. Easy to operate, economical, with the function of adjusting the temperature of the coolant. In cheaper models, this function is implemented using a special device - a thermoelement.

Structurally, a thermoelement is a metal product, the geometric dimensions of which decrease or increase under the influence of temperatures (depending on the degree of heating). And this changes, in turn, the position of the special lever, which closes and opens the traction flap. The photo shows a sample of such a regulator:

Photo: sample thermostat

The more the damper is open, the stronger the combustion process, and vice versa. Thus, the volume of air that enters the closed combustion chamber is completely controlled by the thermostat, and if necessary, its supply is stopped and the combustion process dies out. In more modern models, controllers are installed that, depending on the set thermal conditions, control the air flow, turning on (or off) a special fan (see photo below):

Gas boilers are the most common and cheapest units to operate. Boilers are single-circuit and double-circuit. Single-circuit boilers have one heat exchanger and are intended for heating only. The connection diagram is shown in the figure below:

Single-circuit boiler switching circuit

Double-circuit boilers have two heat exchangers and are designed for heating and receiving hot water. The boiler connection diagram is presented below:

Some boilers have separate regulators for heating and hot water temperatures.

Electric boilers

A fairly common alternative to gas and solid fuel boilers. A lot of advantages, high efficiency, but a long payback period. The connection is simple, like for gas boilers, but without cold water supply. Temperature regulation and overheating protection provided.

Boiler mechanical timer

Using a simple mechanical timer for an electric boiler there are three options for starting the central heating system:

The boiler is off;
The boiler supplies warm water;
The boiler switches on and off at the set time.

Mechanical timers usually have a large, round dial with a 24-hour scale in the center. You can turn the dial to set the desired time and then leave it that way. The boiler will turn on at the right time. The outer part consists of a set of 15-minute period tabs that are inserted for easy adjustment of operation and setting modes. An emergency reconfiguration is possible, which is performed when the boiler is connected to the network.

Mechanical timers are easy to set up, but at the same time the boiler always turns on and off at the same time every day, and this may not satisfy the owners if the family is large and bath procedures are carried out several times a day at different times.

Types of thermostats

By the type of functions, they can be divided into several groups:

- with one function (temperature maintenance);

- with a large number of functions (programmable).

The programmable electronic room thermostat allows you to select the desired and comfortable temperature at any time, it is easy to reconfigure and change the operating mode. The time timer allows you to set a different heating pattern on weekdays and weekends. Some timers allow you to set different parameters for each day of the week, this can be useful for people working part-time or in shifts. Many Terneo and KChM models are equipped with such thermostats.

If a boiler with a radiator is responsible for the heating system, as a rule, only one programmable room thermostat is needed to control the entire house. Some patterns need to be adjusted in the spring and fall when the clock has moved forward and backward, or a certain change in climatic conditions has occurred. We also recommend changing the temperature settings when changing day and night.

Such a climate controller has several options that expand its capabilities:

"Party", which stops heating for several hours, then resumes;
“Override” allows you to temporarily change the programmed temperatures during one of the configured periods;
"Holiday", increases the intensity of heating or decreases it for a certain number of days.

Central thermostat

Such a thermostat is located far from your boiler and usually allows you to turn on or off heating throughout the house. Older versions are wired to the boiler, newer systems usually send signals to the command post of the device. It is the devices of a new type that are equipped with rather expensive but effective devices: double-circuit boilers Ferroli, Beretta and domestic AOGV.

The most famous are room thermostats for a double-circuit boiler of the Gsm and Protherm brands. They have a built-in dilatometric thermostat for the boiler, which, depending on the model, can work remotely; this technology is often used for an electric boiler or solid fuel units.

The room thermostat turns off the heating of the system as needed. It works by measuring the air temperature, and turning on the heating when the air temperature drops below the thermostat setting, and turning it off when the set temperature is reached.

Tips:

It is recommended to set the thermostat at 20 ° C;
At night, the set temperature should be between 19-21 ° C.
It is desirable that the children's room is about 22 ° C.
The temperature should not fall below 22 ° C in the premises for the elderly and people with disabilities.

As a rule, the temperature of the whole house or individual rooms is based on only one climate microcontroller in the heating system. The best option is to place it in the living room or bedroom, which should probably be the most visited place in the house.

Room thermostats need free air flow to measure temperature, so they should not be covered with curtains or blocked by furniture. Devices adjacent to an electric thermostat may interfere with the correct operation of the device. These include lamps, televisions, neighborhood boilers through the wall, touch switches.

Thermostatic control valves

A thermostatic valve is a simple solution to the problem of obtaining a heat carrier of a given temperature by mixing colder water with warmer water. The three-way valve is shown below:

The thermostatic radiator valve allows you to control the room temperature by changing the flow of hot water through the radiator. They regulate the flow of hot water through the radiator, but do not control the boiler. Such devices must be installed to adjust the temperature that is needed in each individual room.

This idea should be considered as a complement to the thermoregulation installation. Also, such devices need periodic readjustment and regular performance checks (every six months during a change in operating modes).

Homemade external thermostat for the boiler: instruction

Below is a diagram of a homemade boiler thermostat device, which is assembled on Atmega-8 and 566 series microcircuits, an LCD display, a photocell and several temperature sensors. Atmega-8 programmable microcircuit and is responsible for compliance with the specified parameters of the thermostat settings.

Strictly speaking, this circuit turns on or off the heating boiler when the outside temperature decreases (increases) (U2 sensor), and also performs these actions when the room temperature changes (U1 sensor). Adjustment of the operation of two timers is provided, which allow you to adjust the time of these processes. A piece of a circuit with a photoresistor affects the process of turning on the boiler by the time of day.

The U1 sensor is located directly in the room, and the U2 sensor is outside. It is connected to the boiler and installed next to it. If necessary, you can add the electrical part of the circuit, which allows you to turn on and off high-power units:

Another thermostat circuit with one control parameter based on the K561LA7 microcircuit:

The assembled thermostat on the basis of the K651LA7 microcircuit is distinguished by its simplicity and ease of adjustment. Our thermostat is a special thermistor that significantly reduces resistance when heated. This resistor is included in the electricity voltage divider network. Resistor R2 is also located in this circuit, with which we can set the required temperature. Based on this scheme, you can make a thermostat for any boiler: Baksi, Ariston, Evp, Don.

Another circuit for a microcontroller-based thermostat:

The device is assembled on the basis of the PIC16F84A microcontroller. The role of the sensor is performed by a digital thermometer DS18B20. A small relay controls the load. Microswitches set the temperature that is displayed on the indicators. Before assembly, you will need to program the microcontroller. First, erase everything from the chip and then reprogram, and then reassemble and use it to your health. The device is not moody and works fine.

The cost of parts is 300-400 rubles. A similar regulator model costs five times more.

A few final tips:

although different versions of thermostats are suitable for most models, it is still desirable that the thermostat for the boiler and the boiler itself be produced by the same manufacturer, this will greatly simplify the installation and the operation itself;
before buying such equipment, you need to calculate the area of \u200b\u200bthe room and the required temperature in order to avoid “downtime” of equipment, and change of wiring due to the connection of devices of higher power;
before installing the equipment, you need to take care of the thermal insulation of the room, otherwise high heat losses will be inevitable, and this is an additional cost item;
if you are not sure that you need to purchase expensive equipment, then you can conduct a consumer experiment. Buy a cheaper mechanical thermostat, adjust it and see the result.

The thermostat for the boiler not only saves our money by reducing the volume of gas, but also increases the resource of the equipment. Such a device should definitely be in service, but what should it be?

How does the operation of a gas boiler with a thermostat change?

The variety today is simply amazing. They have many modifications and operate on various types of fuel. But it is very important to ensure the correct control of such units. This will reduce energy consumption and therefore reduce costs, extend the life of the equipment and achieve an optimal microclimate in every room. All these tasks are within the power of special temperature controllers.

Gas boilers have a cyclical scheme and are turned on after the temperature of the water or other heat carrier drops to a certain value. At the same time, the rate of heating and cooling of water in the system and air in the room is different. Often, the room still has the desired temperature, and the coolant in the system has already cooled down, so the gas boiler burner turns on. This leads to undesirable changes in the microclimate, unnecessary fuel consumption and wear and tear of heating equipment. It is inconvenient to regulate this process manually. By installing a special device, you can avoid such problems.

These fixtures are equipped with a sensor that measures the room temperature. You yourself set its optimal values, and as soon as it gets colder in the house, the device immediately turns on the pump and starts the gas boiler. After exceeding the set threshold, the heating equipment is automatically turned off.

What can be a thermostat for a boiler?

Today the choice of such devices is quite large, you can find wired and remote models, programmable and simple, mechanical or electronic. The cost will differ depending on the type and number of functions. Now let's look at the main differences between the existing thermostats.

The simplest and cheapest, of course, mechanical models, this is what belongs to their main advantage. Such equipment is simple to operate and relatively easy to repair. And the likelihood of failure is minimized. The more expensive is electronic equipment, which is also very unpretentious.

But programmable temperature controllers are already complex devices. To install them, configure them correctly and change the parameters, you have to tinker a little. However, having done these operations 1-2 times, then you will easily cope with such tasks. They provide more precise control and many functions. For example, in some models, you can set the desired temperature in the "day" and "night" mode or program the heating system depending on the days of the week. The remote control is extremely convenient. True, all this will affect the cost of the device.

If you prefer wired thermostats, pay special attention to installation. It is important to ensure uninterrupted communication of the monitoring device with the heating equipment. Wireless controllers provide start-up and shutdown of the gas boiler using a radio signal coming from the control point to the executive. The first is installed in the selected room, and the second directly on the boiler.

Is it difficult to install the sensor?

The maximum efficiency of the thermostats for gas boilers is possible only after correct installation. What's so hard about that? Let's go over the instructions.

How to install a thermostat for a gas boiler - step by step diagram

Step 1: Choosing a thermostat

It is advisable that the thermostat is of the same company as the boiler. This will greatly simplify the installation process. If you decide to use wired sensors, then they must be installed before the start of repair work, otherwise you will have to damage the finish in order to lay the cable. It is also imperative to calculate the heated area before buying a device, this will help to avoid equipment downtime.

Step 2: choosing a location

When it comes to remote devices that are installed anywhere, it is important to choose the right room. It is advisable to choose the most visited, for example, a living room. Sometimes it is placed in the coldest room, it all depends on the needs. The sensor must be located in an open area. It should be excluded from cluttering it with furniture, curtains and other household items. Also, it is not allowed to be placed in the vicinity of electrical and heating appliances. It is also undesirable to hit the device with sunlight or drafts. If valves with thermal heads are installed in the room where the controlling sensor of the thermostat is installed, then they must be replaced with ordinary ones, with manual adjustment. Otherwise, they can distort the readings of the device, and the system will not work correctly.

Step 3: Connect

First you need to carefully read the attached instructions, diagram and act only according to the manufacturer's recommendations. You can connect the device either using the terminal on the gas equipment or by connecting the cable. It all depends on the chosen model. The control element must be located at a height of 1.5 meters from the floor and on the inner wall. This is due to the fact that warm air is at the top, cold air, on the contrary, is concentrated at the bottom, and the outer walls are colder. Before connecting, be sure to de-energize the object, and then connect zero, phase and earth.

Step 4: setup

Now you need to set the required parameters. Usually there are buttons on the front panel of the device, with their help the necessary settings are made. In this case, the technical documentation of the device will again come in handy, which describes the programming process in detail. The step and heating temperature are set. There is also a function to delay the operation of the thermostat. For example, in case of short-term drafts, the device detects them and does not turn on. More expensive models may have a number of options.

If you are in doubt about whether you need to purchase expensive equipment, then you can always experience the effect on cheaper and simpler mechanical models. Avoid downtime of the device and change the batteries in time.