How to properly install a thermal head on heating. What is a thermostatic head with remote sensor? Thermostatic heads for radiators. Classification and principle of operation

The thermostatic head is designed for use with a thermostatic valve, its use helps to save energy more economically, as well as create comfortable temperature. Many apartments and houses have an unbalanced heating system.

Often, especially at the beginning heating season and in the end, the heating does not correspond to a comfortable temperature so much that users are forced to open the windows in order to get rid of the excess heat in the apartment. To avoid these inconveniences, thermostats should be used.

The radiator thermostat is a thermal head and a valve. The thermostatic head is a sealed cylinder with a bellows inside, which contains a working substance that reacts to changes in ambient temperature. The thermostatic head is fixed to the valve with a union nut.

It has a fairly simple principle of operation - when the temperature rises, the bellows stretches, covers the valve and limits the flow of the coolant. As the temperature decreases, the bellows contracts and the coolant flow increases. This device is able to work in automatic mode and adjust the temperature from 6 to 30 degrees.

Please note that thermostatic heads with different working media are used for liquid and gas condensate thermostats. Liquid thermal heads are usually filled with acetone or toluene, and gas ones with liquefied gas. Gas condensate products are characterized by the fact that they react faster to temperature changes.

There are two types of thermostatic heads with a sensor - remote and built-in. The remote sensors are connected to the main unit via a metal tube. Built-in sensors are located directly in the thermostat. A thermostatic head with a built-in sensor is more difficult to install, and many requirements must be met when installing it.

For maximum efficiency of such a thermal head, a radiator up to 16 cm deep is required, the width of the window sill should not exceed 22 cm, the distance from the window sill to the radiator should be no more than 10 cm, and the radiator itself should not be recessed into a niche.

The thermal head with the sensor must be installed perpendicular to the radiator plane, with free access to the air circulation in the room. Such requirements can not be realized in all rooms, and therefore more often buyers choose a thermostatic head with a remote sensor, which can be located even at a distance of up to 8 meters from the main device.

The cost of thermostatic heads is formed on the basis of the composition of the working medium, the type of thermostatic head (liquid or gas condensate), the type of sensor and, of course, the manufacturer. The cost of thermostatic heads from well-known manufacturers will be higher than from unknown companies, but the quality of such a head will also be high.

Thermostatic heads from manufacturers such as Herz, Danfoss will have a good warranty, and will also be more efficient and easier to use. You should also not forget that the thermostatic head is equipment that is purchased for more than one year, and therefore saving is not appropriate here. It is better to buy a good thermostatic head once and enjoy years of comfort than to buy a new one every year and spend your time and effort installing new equipment year after year.

The thermostatic head allows you to set a comfortable temperature in every room of the house, and when used in country houses and cottages with an individual boiler room, you can save up to 25% of heat energy. An important factor in favor of the use of thermostatic heads is the reduction in the emission of combustion products into the atmosphere when they are used. This helps keep the air clean.

The old heating systems did not have a thermostat. In the 90s, the use of these devices began, the novelty was appreciated by specialists and ordinary users.

Thermostatic kit for heating radiator

With the help of the device, you can not only regulate the temperature of a separate room, but also, if necessary, shut off the water supply. This is convenient if you need to replace part of the system - you do not need to completely drain the water and stop heating the house.

Definition and design of a thermal head for a heating radiator

What is a thermostat? This term refers to mechanisms designed to regulate the temperature of the heating system.

• Thermostatic element - a corrugated cylinder or head with a thermostatic composition.
• Valve. It is used when adjusting the flow of liquid, reducing or increasing it. There are 2 types of valves: RTD-G and RTD-N. The first is used in a single-pipe heating system. The second - at two-pipe heating or if there is a double pump in the house.

The thermostat works as follows: when the water in the pipe is heated, the composition expands and the size of the cylinder changes. The thermostatic head moves to reduce the flow of fluid.

According to the type of adjustment, the device is divided into:

1. Mechanical temperature controller. The adjustment is made with a valve.
2. Mechanical to the network. They are regulated by a handle, but the electronic system closes the key.
3. Mechanisms with electric servo drive. The signal is transmitted while in the room, after which the servomotor regulates the water supply.
4. Electronic devices. The water temperature is controlled by buttons.

Thermostatic valves: types, selection, principle of operation

Manufacturers offer various types of valves. It all depends on how the pipes are connected to the radiators.

• Direct valves - used for direct pipe connection to the battery near the surface of the walls.
• Corner - the pipe is brought from under the floor.
• Axial - the connection is made from the surface of the wall.

Electronic battery regulator

The main problem with installing a thermostat is the compatibility of parts produced by different manufacturers. A similar situation occurs when bottom connection with valve insert. It is necessary to carefully select a thermal head for it in order to match the thread diameter and the length of the valve piston.

Models are produced on the market, the details of which are combined with other brands. But such a mechanism, although it will form a single whole, is not able to provide a constant temperature regime.

Mechanism adjustment

Temperature controllers for radiators are first started as follows:

• The throttle on the return line regulates the system.
• The thermostatic tap on the battery opens fully.
• The handle on the thermal head is removed and installed in such a way that the maximum position on the scale corresponds to a fully open valve. The device is installed. Further temperature adjustment is made by turning the handle.
• If the temperature on the display is shown in degrees, it is adjusted using a thermometer.

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Using thermostats on heating radiators can achieve a number of advantages. With the rise in prices for the supplied heat, money is saved. The device pays for itself in 1-2 seasons. Comfortable temperature conditions prevent the occurrence of colds that occur due to frequent airing of rooms in the off-season. The thermostat for heating is installed in a new heating system and in an existing one. Modern models of small sizes, fit into any interior design. The thermostatic head for the heating radiator must be in the heating system.

Thermoheads are shut-off and control valves. There are three types of thermostatic heads:

• manual;
• mechanical;
• electronic.

The functions are the same in all, but the implementation methods differ. Depending on the last parameter, they have different capabilities.

What are manual thermal heads?

By design thermostatic heads duplicate a standard faucet. By turning the regulator, you can adjust the volume of coolant transported through the pipeline.

By setting the thermostat just 1° lower, you can save 6% per year on your annual electricity bill

They are mounted instead of ball valves on opposite sides of the radiator. They are reliable and inexpensive, but they will have to be controlled manually, and turning the valve each time, relying solely on your feelings, is not very comfortable. Basically, such thermal heads are installed on cast-iron batteries.

Switching the valve stem several times a day will loosen the valve handwheel. As a result, the thermal head will quickly fail.

Features of mechanical thermal heads

Mechanical type thermal heads have a more complex design and they maintain the set temperature in automatic mode.

The device is based on a bellows in the form of a small flexible cylinder. Inside it is a temperature agent in liquid or gaseous form. As a rule, it has a high value of the coefficient of thermal expansion.

As soon as the set temperature indicator exceeds the norm, under the influence of the internal environment, which has greatly increased in volume, the rod begins to move.

As a result, the cross section of the passage channel of the thermal head narrows. In this case, the throughput of the battery decreases, and, consequently, the temperature of the coolant to the set parameters.

As the liquid or gas in the bellows cools, the cylinder loses its volume. The rod rises, increasing the dose of coolant passing through the radiator. The latter gradually warms up, the balance of the system is restored and everything starts all over again.

A positive result will be only when there are thermostats in all rooms and on each radiator.

Liquid-filled bellows devices are more popular. Although gases have a faster reaction, the technology for their production is rather complicated, and the difference in measurement accuracy is only 0.5%.

A mechanical regulator is more convenient to use than a manual one. He is fully responsible for the microclimate in the room. There are many models of such a thermal valve, which differ from each other in the way the signal is given.

The thermostatic head is mounted so that it is oriented towards the room. This will improve the accuracy of the temperature measurement.

If there are no conditions for such an installation, a thermostat with a remote sensor is mounted. It is connected to the thermal head by a capillary tube with a length of 2 to 3 m.

The expediency of using a remote sensor is due to the following circumstances:

1. The heater is placed in a niche.
2. The radiator has a dimension in depth of 160 mm.
3. The thermal head is hidden behind the blinds.
4. The large width of the window sill above the radiator, despite the fact that the distance between it and the top of the battery is less than 100 mm.
5. The balancing device is located vertically.

All manipulations with the radiator will be performed with a focus on the temperature in the room.

What is the difference between electronic thermal heads?

Since, in addition to electronics, such a thermostat has batteries (2 pcs.), It is larger than the previous ones in size. The stem here moves under the influence of the microprocessor.

These devices have a large set additional features. So, they can set the temperature by the hour - at night it will be cooler in the room, and by morning the temperature will rise.

It is possible to program the temperature indicators for individual days of the week. Without reducing the level of comfort, you can significantly save on heating your home.

Although the batteries have enough charge to last for several years, they still need to be monitored. But the main disadvantage is not this, but the high price of electronic thermal heads.

The photo shows a thermal head with a remote version of the sensor. It limits the temperature to the set value. Adjustment possible from 60 to 90°

If a decorative screen is installed on the radiator, the thermal head will be useless. In this case, you will need a controller with a sensor that records the outside temperature.

Type of thermostatic elements

The thermal head for the radiator is the upper, replaceable part of the device. It can be of several types:

• manual;
• mechanical;
• electronic.

Almost all major manufacturers make the valve (housing) compatible with any type of thermocouple. The principle of operation described above is a thermostat equipped with a mechanical head. This equipment is considered basic and there are a lot of modifications in this category. They differ in features and price.

To be able to navigate the prices: European manufacturers sell mechanical thermal heads from 15 euros to 25 euros, there are anti-vandal models, they cost from 40 euros. There are devices with a remote sensor. They are set if the conditions do not allow to regulate the temperature on the radiator (for example, it is installed behind a cabinet, closed in a niche, etc.). Here, the length of the capillary tube, which connects the sensor to the thermostat, is of great importance. Prices in this segment are from 40-50 euros.

It looks like a manual device for adjusting the temperature of radiators in the context

A manual thermostat is the same control valve for a radiator. And the principle of operation is the same: turn the knob, change the amount of passing coolant. The only difference is that if you wish, you can simply remove this thermocouple and install a mechanical or electronic one. The case does not need to be unscrewed or changed. They are universal. Heads for manual adjustment have a low price - from 4 euros.

Electronic thermal heads are the most expensive options, they are also the most massive: there is room for two batteries in the case. They differ in that they have more options. In addition to maintaining a stable temperature throughout the entire time, you can program the temperature by day of the week or by time of day. For example, after 9 am, all household members disperse, and appear only after 6 pm. It turns out that there is no need to spend money on maintaining a high temperature during the daytime. Electronic thermoelements and make it possible to set a lower temperature during this period on all days except weekends. Set at least 6-8 ° C, and by the evening you can again heat the air to a comfortable 20 degrees. With these devices, it is possible to save on heating without compromising comfort levels.

Electronic models have a much wider functionality

Thermal heads are also divided according to the type of temperature agent (substance that is in the bellows). They are:

• liquid;
• gas.

The gas thermostat is considered less inertial, they say it responds faster to temperature changes. But the difference is not so big as to give preference to a specific species. The main thing is the quality, not the type of temperature agent. Liquid thermostats are no less high quality. Moreover, they are easier to manufacture, therefore they are produced in a wider range.

When choosing a thermocouple, you need to pay attention to the temperature range that the device can support. Usually it is from +6oC to +26-28oC

But there may be differences. The wider the range, the higher the price. Dimensions and design, connection method also change.

Thermostat for a heating radiator principle of operation and device

The design of the heating regulator on the battery includes the following elements:

• valve or faucet;
• thermostatic mechanism.

Control device device

A thermostat or thermal valve is a standard valve in a housing with a control mechanism. The cone is considered a locking element, which, when moved, changes the amount of coolant. The movement of the cone is facilitated by a thermal head, consisting of a cylinder with a thermal component. The cylinder is called a bellows, and a special liquid or gas is used as the thermal components. When heated, this component expands in volume and pulls the cylinder, which moves the conical part. The cone blocks the movement of the coolant flow and the composition cools down. In this case, the bellows becomes smaller. Then the cone rises, and the liquid moves into the battery and contributes to the heating of the thermal head of the equipment. This technique allows you to maintain the desired temperature.

The thermal head for the regulator requires adjustment

Helpful information! When installing the device on a radiator, it should be borne in mind that the battery will not completely warm up. Some areas will be chilled. If you remove the thermal head, then the entire surface will gradually warm up.

Adjustment method

Depending on the method of adjustment, thermostatic heads conditionally divided into:

• mechanical devices that allow you to change the temperature manually;
• electronic devices that adjust automatically.

Mechanical Models cheaper, but due to the constant change of position, the adjusting knob wears out over time. In addition, such devices require constant monitoring by residents.

Unlike mechanical counterparts, electronic thermal heads independently change the temperature in the room according to the specified settings. In addition to the obvious convenience, the minimization of risks associated with the uncontrolled use of temperature control equipment is guaranteed.

Photo 3. Electronic type thermal head for heating radiators. The temperature of the heater is shown on the display.

Available for sale programmable electronic thermal heads equipped with timers and allowing you to adjust the room temperature depending on the time of day, street temperature or other parameters.

Installation and adjustment of the thermostat

Before starting work, turn off the supply riser and drain the water from the system. After that, the liners are cut off, the liners are disconnected, piping is installed and connected to the line pipes. If the heating system is single-pipe, you need to install a bypass (a jumper that connects both device connections - direct and return). This measure is necessary so that the coolant can circulate after the battery is closed by a thermostat.

It is necessary to set up the device with closed windows and doors, minimizing heat loss. The thermostat is set to maximum. When the temperature rises by 5-6 degrees, the device is turned off. The valve is opened only when it drops to the desired value. At correct position heads in the device, the sound of water will be heard, the body of the device will heat up.

Installing a thermostat on a heating radiator

When buying a thermostat for heating, you need to take into account in advance all the factors that can affect its functioning. It is necessary to carry out special calculations, which are best entrusted to a specialist. You should also not install and configure the device yourself if you do not have the necessary skills. It is better to contact a professional once than to reinstall or reconfigure the thermostat later.

Step-by-step guide to installing a thermostat

Temperature controller installation technology extremely simple in its implementation. The device connects in just 4 basic steps. Do each one in sequence.

The first step is to prepare the heating radiator for the installation of a thermostat. Disconnect the battery and drain the remaining water. Remove the valve if present. A single-pipe heating system must be equipped with a bypass. This simple jumper will allow the coolant to circulate in the system even if a separate radiator is turned off. That is, you will not cause inconvenience to your neighbors and will not disturb the heating in other rooms of your home.

Draining

The second step is to install a thermostat. When installing the device in question, a threaded connection is used. The thread must be sealed with sanitary flax, previously impregnated with some kind of paint. Screw the regulator into the hole of the battery intended for the inlet of the coolant. Do this without much effort, otherwise you risk damaging the body of the product. The valve is marked with an arrow

It is important that its direction is the same as the direction of movement of the coolant.

Mounting the thermostat

The third step is to install the thermostatic element. This device is designed to determine the temperature in the room. It is also responsible for controlling the locking mechanism. Installed in a horizontal position. The composition of the element includes a temperature sensor. It is important to install in such a way that heat from the heatsink does not directly affect this sensor.

If for some reason you cannot install the device horizontally, it is strongly recommended not to leave everything as it is, but to buy a model with a convenient remote sensor. It can be installed at a distance of 2 m from the battery and even more.

radiator thermostat installation diagram

The installation of the temperature sensor must be carried out in accordance with some rules, namely:

• The device must be located at a height of at least 80 cm from the floor surface. Cold air, in accordance with the laws of physics, is collected at the bottom. Contact of the thermal sensor with such air will reduce the accuracy and efficiency of the system;
• The temperature sensor must not be exposed to direct currents of warm air. Keep in mind that it can come not only from the radiator, but also from a variety of household appliances;
• the device must not be exposed to direct sunlight;
• the sensor must not be covered with furniture, storms or other similar objects.

Brackets are used to fasten the remote temperature sensor. Choose a suitable place for installation and install the device in question.

The fourth step is setting up the thermostat and preparing for use. When the heating system is switched on for the first time, the thermostat must be calibrated and adjusted. Set up in accordance with the instructions that go specifically to your device, because. For different models, the procedure for carrying out this procedure may differ. General rule only one thing - you can start setting up only after a complete and uniform warm-up of all heating devices in the home.

Thus, in self installation a thermostat for a heating radiator is nothing complicated. Having understood this work and having completed all the required operations in stages, you can conveniently adjust the level of space heating, providing maximum rational use energy, which will significantly reduce the final cost of heating.

Heating thermostats

Successful work!

Video - Thermostat for a heating radiator

Most Popular Brands

The right decision when buying a thermal head is to focus on reputable manufacturers. Unfamiliar trademark with unknown history This is a big risk of wasting money.

You can safely purchase products from manufacturers such as Dunfoss, Oventrop, Caleffi, Salus and other well-known companies.

Place #1 - Danfoss

Danfoss concern has been producing thermal heads for over 60 years. This is a Danish manufacturer, under its license, products are also produced in Russia. The most frequently asked is the RTS Everis thermal head.

This is a liquid-filled bellows product. By direct fixation, it mates with branded thermal valves. Others require an adapter.

The range of equipment for the automation of heating systems at the Danfos concern is rich and responsible advanced technologies. You can control the operation and configure the thermal heads remotely using a smartphone for this

Place #2 - Oventrop brand

Thermal heads Oventrop of the Uni line are in great demand among consumers. They are equipped with a liquid bellows. They are connected to the thermal valve with a union nut. The temperature can be set between +7 - +28 °C.

There is a possibility of complete closure. The heads are designed for the maximum temperature in the system +100 - +120 ° C - these are the characteristics indicated by the manufacturer in the accompanying documentation.

Oventrop Uni heads are compatible with other sanitary products from this company. They can be connected without an adapter to other devices with a built-in valve and a corresponding thread

Install them on thermostatic valves with a suitable connection. On the heads of many series there is a special mark for people with low vision, an anti-vandal casing.

Place #3 - Thermo Company

Consumers of the products of the Swiss company Thermo, in particular, the Royal Thermo RTE 50.30 model, highly appreciated. It is distinguished by a wide adjustment range - from +6 to +28 ° C, a low hysteresis value - 0.55 degrees. There is also a zero position.

For correct operation, the coolant must have a temperature of no higher than 100 ° C. Pairing with the valve - union nut.

Thermo heads of the Thermo company differ in reliability, quality of assembly. Among the offers there are models with a remote sensor

Place #4 - manufacturer Caleffi

The Italian manufacturer Caleffi supplies wide range of radiator thermostats. Model Caleffi 210000 - programmable. It is equipped with a digital LCD temperature display. In addition to the temperature value, it shows the time, date, set daily program.

When buying equipment for heating systems, be sure to ask the seller for accompanying documents, a manufacturer's warranty and instructions for the product

When programming for a week, you can set 3 temperature levels: "Comfort", "Economy", "Anti-freeze". Install this head in tandem with Keleffi valves.

Seat #5 - Salus Company

The German company Salus also enjoys a well-deserved reputation. For example, the Salus PH 60 model is an electronic head with non-volatile memory, the ability to set the temperature for a week. Temperature range - +5 - +40 °C.

Power supply is carried out from 2 AA elements. The display has the function of backlighting and displaying temperature parameters, as well as the charge level of the elements.

A new development is a wireless mini thermal head, powered by batteries. You can control the device through a computer or smartphone, after downloading the Smart Home application

Thermostat manufacturers

A quality device can serve the owners for a long time. It will not be difficult to find a thermostat for heating, the price of which will be quite acceptable. But when choosing a reliable device, it is better not to save much. The German company Oventrop and the Danish Danfoss are considered one of the best. German temperature controller Danfoss heating are suitable for any heating systems. Like Oventrop products, Danfoss blends in perfectly with the interior; both have intuitive settings and do not stand out from the general background.

Temperature controllers have proven themselves in harsh climates. To maintain heating, the temperature is adjusted within 6-26 degrees. Regulators distribute the required amount of water throughout the heating system.

Thermostats are useful devices with wonderful functions. They help not only optimize the temperature in the apartment, but also save the family's money (besides, they quickly pay off). Especially useful will be the owners of cottages who do not live there permanently. During the absence of the owners temperature controller heating will switch to a more economical mode with support for a minimum warm microclimate.

Why do you need a thermostat for a heating radiator

Installation of regulating elements on radiators is necessary not only to maintain a comfortable temperature, but also to ensure safety and convenience. Indeed, in this way, it becomes possible to disconnect the battery from the common riser (for example, when a leak occurs or during repairs).

Regulator Danfoss

There are three types of control elements:

• Ball valve.

ball valve

• Valve.

Radiator valve

• Temperature controller.

Electronic thermostat

The ball valve can only completely block access hot water into the radiator (when partially closed, it quickly wears out and breaks), so it is only useful for emergencies. The valve can regulate the amount of coolant supplied, however, it does not provide sensors, which is why it is not very convenient to use it. The temperature controller with a thermostat precisely regulates the water supply, thanks to which it can solve two problems at once:

1. Maintaining comfortable conditions in each room due to the separate regulation of each radiator (especially important when orienting rooms to different cardinal directions).
2. Reducing utility bills (excessive heat payments will be excluded).

Purpose and design of the thermal head for heating radiators

The main task of the thermostatic head is maintaining the air temperature in the heated room according to the given settings.

Depending on the capabilities of a particular model, a fixed or dynamic temperature background is set in the room.

For this device class characterized by high adjustment accuracy- for models of the middle price segment, the error does not exceed 1°C. In addition to maintaining a comfortable temperature, the use of such devices also contributes to more economical energy consumption by optimizing the circulation of the coolant in the heating system.

Important! Depending on the operating mode, the average amount of energy saved when using thermal heads varies from 10 to 20%. . Device

Device

Basic structural elements thermostatic head:

• plastic case;
• bellows;
• rod, pusher and return spring;
• locking element;
• sealing elements;
• fasteners.

thermostatic valve

Most models of thermal heads equipped with valves, whose main task is to regulate the diameter of the radiator inlet channel. Thermostatic valves are mounted on a straight or corner section of the heating circuit.

Photo 1. Thermal head with a thermostatic valve. It is the valve device that regulates the amount of coolant admitted to the radiator.

Removing the thermal head from the valve at the end of the heating season allows you to solve this problem and significantly extend the period of effective operation of the device.

Attention! With prolonged inactivity or prolonged operation in one mode, the risk of “sticking” of the moving elements of the thermostatic head is greatly increased. . Principle of operation

Principle of operation

Thermal head bellows filled with a medium with a high coefficient of thermal expansion (usually - ethyl acetate, toluene or wax), reacts to changes in the background temperature in the room. The user sets the desired room temperature.

With an increase in this indicator, the bellows filler drives the rod, reducing the diameter of the thermostatic valve passage. The throughput of the radiator decreases and the temperature drops in accordance with the set parameters.

Photo 2. The structure of the thermostatic head for radiators. The arrows indicate the component parts of the device.

When the temperature drops below the set value, the bellows filler decreases in volume and the process is the reverse of the one described above.. The circulation of the coolant increases and the temperature in the room rises to the desired value.

Important! Installation of thermal heads on cast iron radiators ineffective, since the cooling and heating of cast iron takes a long time, especially when compared to aluminum, steel and bimetal radiators.

Varieties

Classification thermal heads carried out in several ways:

• compatibility with thermostatic valves of a certain standard;
• temperature control method.

Benefits of using a thermostat

Modern thermostats have many advantages. One of them is the extreme ease of use. Such devices are easy to install and further use, it is absolutely easy to figure it out. Devices of a modern sample contribute to the creation of the most favorable and comfortable environment in the premises. They allow you to significantly save on heating and spend resources as rationally as possible.

Benefits of using a thermostat

In addition to maintaining the required temperature and creating a comfortable microclimate, such a moment as saving thermal energy is very important. So, for example, in apartments that are heated by means of centralized heating, for additional savings it is necessary to install thermostats and a heat energy meter, and in the case of individual heating, all the savings come down to reducing the amount of energy consumed, which is achieved with the help of thermostats.

Radiators with thermostats

If heating is only at the planning and development stage, it is best to buy radiators with already built-in thermostats. However, the installation of a thermostat will not cause any difficulties in the case of ready-made systems. You just need to tune in to work and prepare the necessary tools for this.

Thermostat connection set

1. Bulgarian, hacksaw or jigsaw.
2. Set of wrenches.
3. Pipe clamps.
4. Sanitary paste.

Prepare everything you need in advance so that in the future you will not be distracted by the search for the missing elements.

The principle of operation of thermostats

Undoubtedly, the automatic heating temperature controller greatly simplifies the life of the owners. But you can save thermal energy even without a thermostat, despite the fact that you will have to deal with adjusting the radiators yourself. An ordinary valve and throttle will help with this, but compared to a thermostat, the use of these devices is still inconvenient.

The thermostat reacts to fluctuations in the outside temperature and regulates the heat supply.

Using a throttle and a valve, you will have to adjust everything yourself several times a day. Also, heat transfer will vary somewhat depending on fluctuations in the temperature of the coolant.

The thermostat automatically regulates the room temperature by increasing or decreasing the flow of water through the radiators. If it's hot, the water consumption is reduced. In case of cold weather, the thermostat opens slightly. The very principle of operation of the heating thermostat depends on the specific type of adjustment.

Mechanical thermostat

The components of the thermostat are a thermal head and a valve. The thermal head includes a regulator, a fluid element and an actuator. Sometimes the liquid element is replaced by an elastic or gas element. The cylinder-shaped thermoelement has corrugated inner walls, which are called bellows. The bellows contains a working environment in which a reaction takes place to changes in temperature indicators.

In proportion to the increase in room temperature, the volume of the working medium increases and the bellows is stretched. Further, the working stem of the valve adjustment is shifted, closing the coolant supply. If the temperature in the house drops, then the working medium decreases in volume and the bellows is compressed. The return stroke of the rod contributes to an increased flow of coolant to the radiator. Interestingly, a mechanical heating temperature controller, or rather a stretching and contraction mechanism, can stretch up to 1 million times.

Electronic thermostat

The electronic thermostat automatically controls the boiler and other actuators such as valves, pumps, mixers, etc. The user himself can set the most preferable temperature microclimate, and the electronic thermostat maintains the set temperature.

A standard electronic thermostat for heating contains a temperature sensor that is installed anywhere in the apartment, but at a remote distance from the heating devices. Further, the device reads the information in that part of the space in which it is located. The data is transmitted and the thermostat can control the heating system of the house.

The electronic programmable thermostat for the heating system is divided into two types: a thermostat with open and closed logic.

In a closed logic, only some parameters are allowed to be changed, while an open one provides more freedom: thermostats are easy to program, there is also a huge list of functions and all kinds of settings. Oddly enough, closed thermostats are in great demand. This is due to the fact that it is difficult for ordinary residents to understand the settings and all kinds of modes, it is easier to install a closed thermostat that will do everything by itself.

Installation of thermostats

Many people are worried about which rooms to put thermostats in. Often the installation is done in the bedroom, but this is undesirable. It is more efficient to install in rooms with temperature differences, in rooms with frequent people (kitchen, living room, etc.). For a bedroom, a conventional valve that regulates the supply of heat is quite enough.

Installing the thermostat in two-story house necessarily takes place on the second floor, from where the heating system of a private house will be adjusted. This is explained by the fact that the flow of warm air is directed upwards, as a result of which the first floor remains cooler than the second. A thermostat with a sensor is installed in rooms with free air circulation. The device is placed in a horizontal position, only in this way the sensor shows reliable data. We have already written how the thermostat for heating works.

Correct installation occurs when installing a thermostat at the inlet to the battery. The thermostatic valve has a male thread on one end and a female thread on the other. Diameters are half-inch and four-inch. The thermostat is screwed into the radiator cap with the outer end of a suitable diameter.

The device and principle of operation of the thermostat

The design of a standard thermostat for a heating radiator consists of valve and special thermostatic head. In the device under consideration, the valve is the so-called. executive device. The composition of the thermostatic head includes a special cylinder with a working substance. This substance is sensitive to temperature changes and it is thanks to it that the thermostat can perform its main function.

Thermostat for heating battery

As the temperature rises, the volume of the substance under consideration increases. A decrease in temperature leads to back reaction. With such changes in the volume of the substance, the movement of the pressure rod associated with the cylinder occurs.

The thermostat head is mounted on the valve. With constant expansion and contraction of the substance, the rod compresses or releases a special locking spring-loaded cone, which opens or closes the through hole, controlling the supply of the main coolant.

valves radiator thermostats DANFOSS

The radiator thermostat can be operated with gas or liquid media. In accordance with this parameter, existing devices are divided into gas-filled and liquid. Thermoregulators with a gas working substance respond faster to temperature changes. Liquid ones respond more accurately to pressure drops in the cylinder, which allows for the most accurate temperature control.

thermostat

The thermostat works on the same principle, both in simple one-pipe and two-pipe heating systems. The difference lies only in the resistance of the valves: in single-pipe heating systems, this parameter is noticeably lower than with two-pipe heating.

A suitable thermostat should be selected at the design and development stage of engineering systems. In the event that the device is installed on already installed and connected heating batteries, its efficiency will decrease significantly.

Electronic thermostat

Thermoregulators with manual and automatic program control are available for sale. Software models are more convenient. Their device is such that they allow you to control the temperature in a heated room, adjusting to a variety of additional factors, for example, time of day. Electromechanical devices are only capable of maintaining the temperature at one set level.

Thermostat radiator angular

The mechanical thermostat works on the principle of an iron: when the room is heated to a predetermined temperature, the device turns off, and as soon as the air cools down by a couple of degrees, it turns on again.

The principle of operation of a thermostatic valve

The first thermostats for radiators, designed to maintain a constant temperature in the room, were invented back in 1943 by DANFOSS, which also owns the market leadership in the production and sale of such devices. For this reason, our article will be based on the materials and recommendations of DANFOSS, whose long-term experience is beyond doubt.

Over the years since their invention, thermostats for radiators have evolved and become what we know them to be. Structurally, they consist of two main elements: a valve and a thermal head, interconnected by a locking mechanism. The purpose of the thermal head is to perceive the ambient temperature and, in order to regulate it, act on the actuator - the valve, which blocks the flow of the coolant entering the heater.

This method of regulation is called quantitative, since the device affects the flow rate of the coolant passing into the radiator. There is another method - qualitative, with its help the temperature of the water in the system changes. This is done by the temperature controller mixing unit), installed in a boiler room or heating point.

To understand the principle of operation of the thermal head, it is proposed to study the diagram of the device shown in the section:

Inside the body of the element there is a bellows filled with a temperature-sensitive medium. It is of two types:

• liquid;
• gas.

Liquid bellows are easier to manufacture, but lose to gas bellows in terms of speed, so the latter are very widespread. So, when the air temperature rises, the substance in the enclosed space expands, the bellows stretches and presses on the valve stem. That, in turn, moves down a special cone, which reduces the flow area of ​​the valve. As a result, the coolant consumption is reduced. When the surrounding air is cooled, everything happens in reverse order, the amount of flowing water grows to a maximum, this is the principle of operation of the thermostat.

What is a thermostat for?

Properly selected and installed thermostatic valves not only save energy, but also greatly simplify the life of the homeowner in terms of adjusting the temperature in the rooms. After all, with the help of heating boilers, you can change the heating of all rooms at the same time, increasing or decreasing the temperature of the coolant. But the regulators of heating batteries make it possible to heat the premises in different ways, depending on their purpose, which brings considerable energy savings.

For reference. Most modern boilers can be connected remote thermostat heating to control heating in automatic mode. But this does not solve the issue, since the coolant with a certain temperature will still flow into all rooms at once.

The task of the thermostatic valve is to regulate the amount of coolant entering the room depending on the air temperature in the room, automatically maintaining it at the level that the user has set. The main thing is that a sufficient amount of heated water comes from the side of the heat generator, because the thermostat for the radiator can only reduce its consumption, but not increase it.

The purpose of radiator thermal valves is described in the following video:

Thermal head device

The thermostatic head is a hot stamped white (black, grey, golden or transparent) plastic housing, in which a bellows container (bellows, thermoballoon) made of galvanized steel or brass is located. The container is filled with ethyl acetate or toluene - substances with a high coefficient of thermal expansion. Some manufacturers use gas condensate as a filler for the bellows tank (for example, in Danfoss RTD models), which has the fastest response to changes in room temperature.

Thermostatic fittings on the floor heating distribution manifold.

Note! There are models in which wax is used as a thermoelement, which also has a high coefficient of expansion.

The thermal head is used in conjunction with a thermostatic radiator valve (valve).

A polypropylene or stainless steel rod, under the influence of a substance in the bellows, narrows or increases the cross section of the valve passage, thereby regulating the volume of coolant entering the radiator.

A locking element is located in the upper part of the case, which allows you to fix the settings.

Thermostatic head device. Model Danfoss RTD-N.

Some manufacturers use a cone-shaped metal-to-metal connection without gaskets to connect the valve to the pipeline. This solution allows you to increase the service life and reliability of the connection, especially at high temperatures and chemically aggressive, contaminated coolant. However, to prevent the appearance of dents and scratches on the metal, it is recommended to lubricate the contacting surfaces with industrial grease before installation. O-rings and gaskets wear out relatively quickly, which increases the likelihood of leaks. In addition, the absence of sealing materials allows for frequent disassembly/assembly of the connection.

The thermal head for the heating radiator is equipped with a security system that protects the heating device from freezing. For example, if the room temperature drops to +5°C - +8°C (different models have their own minimum temperature level), the thermal head automatically raises the rod, thereby launching the coolant into the radiator.

Depending on the type of heating system and the installation conditions of the device, valve-thermal head kits in various combinations can be used to control the flow of the coolant. In single-pipe heating systems, it is recommended to install valves with increased capacity and low hydraulic resistance(product marking produced by DANFOSS – RA-G, RA-KE, RA-KEW).

The same recommendation applies to two-pipe gravity systems, where the coolant circulates naturally, without forced stimulation. If the heating scheme is two-pipe with a circulation pump, then you should choose a valve with the ability to adjust the throughput (DANFOSS marking - RA-N, RA-K, RA-KW). This adjustment is quite simple and special tool not needed for her.

When the issue with the selection of the valve is resolved, you need to decide on the type of thermal head. They are offered in the following versions:

1. With an internal thermocouple (as in the diagram above).
2. With remote temperature sensor.
3. With external regulator.
4. Electronic (programmable).
5. Anti-vandal.

A conventional thermostat for heating radiators with an internal sensor is accepted for installation if it is possible to position its axis horizontally so that the room air freely flows around the body of the device, as shown in the figure:

Attention! It is not allowed to install the thermostat on the battery in a vertical position, the heat flow rising from the supply pipeline and the valve body will affect the bellows, as a result of which the device will not work correctly. . If a horizontal mounting head is impossible, it is better to purchase a remote temperature sensor for it, complete with a capillary tube 2 m long

It is at this distance from the radiator that this device can be placed by attaching it to the wall:

If horizontal mounting of the head is not possible, then it is better to purchase a remote temperature sensor for it complete with a capillary tube 2 m long. It is at this distance from the radiator that this device can be placed by attaching it to the wall:

In addition to vertical mounting, there are other objective reasons for buying a remote sensor:

• heating radiators with a temperature controller are located behind thick curtains;
• in the immediate vicinity of the thermal head, pipes with hot water or there is another source of heat;
• the battery is under a wide window sill;
• the internal thermoelement enters the draft zone.

In rooms with high interior requirements, batteries are often hidden under decorative screens made of various materials. In such cases, the thermostat that has fallen under the casing registers the temperature of the hot air accumulating in the upper zone and can completely block the coolant. Moreover, access to head control is completely closed. In this situation, the choice should be made in favor of an external regulator combined with a sensor. Options for its placement are shown in the figure:

Electronic thermostats with a display also come in two types: with built-in and removable control unit. The latter differs in that the electronic unit is disconnected from the thermal head, after which it continues to function normally. The purpose of such devices is to adjust the temperature in the room according to the time of day in accordance with the program. This allows you to reduce the heating output during working hours when no one is at home and in other similar cases, which leads to additional energy savings.

When there are small children in the house who want to try everything with their own hands, it is better to install an anti-vandal type thermostat with a casing that protects the device settings from unskilled interference. This also applies to thermostats in other public buildings A: Kindergartens, schools, hospitals and so on.

Thermal head installation rules

The connection point when installing the thermal head on the radiator does not depend on its type. In any case, this is a pipe that directly supplies the coolant to the battery.

In order for the device to work correctly, air must constantly circulate around it.

1. The housing must be protected from direct UV rays. Otherwise, the device will not work accurately.
2. The thermal head must be open. It should not be hidden by any protective boxes, furniture.
3. The device must not be placed above the heating pipes. In this case, there will be a mismatch between the room temperature and the area around the head.
4. If the device is practically isolated, you need to arrange a bypass line or put a bypass valve in the area of ​​\u200b\u200bthe supply pipe and return.
5. The pipeline to be connected must not exert pressure on the valve body.

During installation, the thermal head regulator must be set to maximum. This will ensure the correct operation of the device. Immediately before installation, the movement of water or other coolant in the circuit must be blocked, then drained.

It is forbidden to install the thermal head vertically. It should be parallel to the floor. This position ensures that it is not affected by warm air.

Device installation sequence

Installation must begin with cutting pipes, which is performed by stepping back a little from the radiator. The next step is the dismantling of the existing valves. Next, the shanks are separated from the valves and screwed into the radiator plugs.

Mount the strapping in place, having previously assembled it, connect the pipes. It remains to adjust the temperature by turning the thermostat knob until the notches match the existing marks on the body, corresponding certain temperature.

It is not recommended to overtighten the thermal head fastening nuts, as The materials it is made of are quite soft. To do this, it is better to use a torque wrench.

It is important that the arrow on the housing points towards the flow of hot coolant in the system. Otherwise, the work has been done in vain, nothing will work

You can install the thermal head both at the inlet and at the outlet.

But not all batteries have a top feed, it can also be a bottom one. If there is no sample that fits in height, the output is to set the thermal head to a lower temperature.

Since it is cooler near the floor, and the appliance is set to the temperature that should be at the top edge of the radiator, the room will be hot. To avoid this, you can install a thermal head with a remote sensor. There is also such an option as self-tuning the regulator.

Features of the setup

For normal operation of the device, pre-configuration is required. Before that, turn on the heating and isolate the room by closing the door.

At a certain point, a thermometer is installed and the settings are started:

1. Turn the thermal head to the left until it stops so that the coolant flow is completely open.
2. Wait until the temperature rises by 5-6 ° compared to the original.
3. Turn the head all the way to the right.
4. When the temperature drops to the desired value, the valve is gradually unscrewed. They stop rotation when noise appears in the radiator and the case warms up.

The last position of the thermal head corresponds to the comfort temperature. It will be constantly supported.

The design of electronic thermal heads includes built-in programs. They make it possible to adjust the temperature with great accuracy - up to 1 degree.

The described sequence is suitable for most devices. If it is different, then it is not difficult to fulfill it, since everything is detailed in the passport.

Why do you need a thermostat

This device is needed if the room temperature needs to be lowered. As a rule, this applies to the upper floors of city houses, where the heating system is equipped with an upper water supply and vertical wiring. Of course, the unit is used not only in high-rise buildings. Adjustment of heating radiators in a private house is also required quite often. By installing a thermostat on the heater, you can easily set the desired temperature. The error is very small and is only one degree.

It must be remembered that thermostats are not used to increase heat transfer. They can only lower it, but not make it higher. If the heating radiator does not heat, install other devices - electric heaters. Their principle of operation, in general, as well as the purpose, differs from temperature controllers. They are used quite often, both in the private sector and in city apartments. Their main purpose is to heat the liquid. Therefore, if it is cold at home, then it makes sense to install heating elements to increase the heating efficiency. You can mount them on all types of batteries, including cast iron ones.

Thus, electric heaters for heating with a thermostat are set when it is necessary to increase heat transfer, and thermostats - when to lower it. Thermostatic regulators can be used with any type of battery except cast iron. This is due to the fact that cast iron products have a sufficiently large thermal inertia. And the thermostats in this case will be simply useless.

Features of mounting the thermostat

Before you install the device, you need to determine its location. The functioning of the thermostat depends on a number of factors. For example, outdoor temperature, building air circulation

The presence of direct sunlight is also of no small importance. Extraneous sources of heat (cold) in the apartment are also taken into account

If the house is private, then most often the temperature controller for the heating radiator is located on the top floor.

This is due to the fact that heated air accumulates at the top: the temperature difference at the lower and upper levels of the room will be significant. Mount the devices horizontally pipes near the point of entry into the heating equipment. In urban apartments, it is better to first install a thermostat on a heating radiator where temperature fluctuations are most noticeable. These can be: a room exposed to direct sunlight, a kitchen.

Naturally, before installing the regulator, it must be purchased. You can either buy it in a store or order it online. For a thermostat for a heating radiator, the price depends on the type of connection and the manufacturer. On average, the cost of the device starts from 1000 rubles. I must say that the price range is quite wide. When the unit is purchased, and its location is selected, you can proceed with the installation.

The thermostat is installed on the heating radiator according to a certain algorithm:

• the supply riser is turned off, the entire coolant is drained from the system;
• horizontal connections are cut off, while it is desirable to observe a certain distance from the battery;
• the cut pipe, the faucet are removed from the heater;
• shanks and nuts are disconnected from the stopcock and thermostat valve, and wrapped in radiator plugs;
• piping is being assembled;
• everything is put in a pre-selected place;
• the piping is connected to horizontally located supply pipes connected to the riser.

As you can see, installing a regulator on a heating radiator is easy. But if, then when connecting a thermostatic device, it will be necessary to replace the heater connection diagram. For this purpose, to connect the direct and reverse connections of the structure, it is necessary to install a jumper - a bypass. This element allows the coolant to circulate if it is necessary to shut off the heating with a temperature controller.

To complete the circuit, you will need to remove the device. The valves must first be closed. If the system is two-pipe, then it is possible to control the flow of water into the radiator. But in this case, it is necessary to put the radiator thermostat on the upper connection.

Thus, we can conclude that today special electric heaters and thermostats are used to regulate the temperature in the room. The first ones are used if it is necessary to increase the heat transfer of heaters, and the second ones - to reduce the temperature and make the heating more uniform. Temperature controllers can be purchased at any store for a very reasonable price. Installing them is easy and it is quite possible to carry out the installation on your own.

Installing a temperature controller on a heating radiator

The thermostat for the heating radiator is mounted at the inlet to the equipment. A special arrow indicates the direction of the coolant. If installed incorrectly, the design will not function. If the direction of flow is observed, the thermostat can be placed at the inlet and outlet.

The installation of the control device is carried out taking into account the specific instructions for the product

Before installation, you should pay attention to the recommendations in the instructions for height and other parameters. Many structures are placed at a height of 50-60 cm from the floor

If a bottom connection is used, the installation height must be selected. In this case, a lower temperature value is set on the thermal head. Alternatively, you can set it up yourself. If a model with a remote sensor is installed, then the thermal head can be mounted at any height.

Installing an electronic device

Experts recommend installing the thermostatic head in a horizontal position. If the device is directed upwards, then the substance in the cylinder will always be in a heated state and the room will be cold. When installing temperature sensors for heating in a single-pipe type system, do not forget about installing a bypass. It is also worth considering that thermal valves can be with compression or union nuts.

Arrangement of a thermal valve in various systems

Helpful advice! To be able to repair the radiator without shutting down the system, it is recommended to install a bypass.

Design customization

For the design to function correctly, you need to configure.

Proper setup and adjustment contribute to the quality of the entire system.

A thermometer is installed in the room where it is necessary to control the temperature. Then you can start setting up:

• coolant flow opens. In this case, the thermal head moves to the left;
• the temperature indicator rises by 4-7 degrees;
• the thermostat head turns to the right, thereby covering the flow of coolant. The room gets colder;
• after reaching a suitable temperature, you need to slowly open the valve. The rotation stops after the liquid makes a noise. There are numbers on the cap that you need to focus on.

With the help of these numbers, the equipment is configured

Adjusting the thermostat is a simple procedure that allows you to calibrate the design to specific requirements. Before installation and configuration, you need to read the instructions. Most often, you need to follow a standard sequence of actions. But for some models there are special recommendations.

The performance of the device depends on the quality of the material.

Control devices can have three types of heads, but any product only works to lower the temperature value, but it cannot increase it.

A quality instrument provides efficient work radiator

How to install a thermostat on a battery

The first recommendation is not to put thermal heads on all heaters within sight. Here the rule is as follows: radiators whose total power is 50% or more of all those in the same room should be regulated. For example, when there are 2 heaters in the room, then 1 battery, whose power is greater, should be equipped with a thermostat.

Advice. If cast-iron radiators are used as heating devices, then maintaining the microclimate using thermostatic valves will be ineffective. The fact is that the operation of cast-iron batteries is very inertial, after blocking the coolant flow, they radiate heat for a long time and vice versa, they accelerate for a long time. Mounting valves does not make sense, you will only waste your time and money.

The first part of the device - the valve - is recommended to be mounted on the inlet supply pipeline at the moment the radiator is connected to the heating system. In the case when it is required to be embedded into the assembled system, the supply line will have to be dismantled. This will cause some difficulties if the connection is made with steel pipes, you will need a tool for cutting pipes and threading.

After the thermostat is installed on the heating battery, the thermal head is mounted without any tools. It is enough just to combine the marks on the cases and fix the head in the socket with a smooth pressure. The click of the locking mechanism will serve as a signal.

It is a little more difficult to install an anti-vandal thermostat, for this you need a 2 mm hex wrench. Having combined the required marks, as shown in the diagram, you need to press the thermal head, and tighten the fixing bolt located on the side with a hexagon.

The installation of the remote sensor and regulator is carried out on a section of the wall free from interior details and furniture, placing them at a height of 1.2-1.6 m from the floor, as shown in the diagram:

First, a mounting plate is attached to the wall with dowels, and then the case is snapped onto it with a simple click. The capillary tube is fixed to the wall with plastic clamps, as a rule, they are included with the product.

In addition to the standard temperature control in the heads, the thermostat is set to the maximum and minimum limits, beyond which the wheel will become impossible to turn. For this, restrictive pins located at the rear of the product are provided. You need to pull out one of them and, after debugging the system, insert it into the hole under the corresponding label:

Principle of operation

The electronic type heating temperature controller is equipped with a temperature sensor, which is installed in a place free from direct exposure to electrical heating appliances, it provides the device with information about the thermal state of the room. Based on the data received, the electronic device controls the elements of the heating system.

There are digital and analog thermostats with temperature control. The former are most widely used due to their functionality. Electronic type thermostats are:

• Closed logic.
• With open logic.

Closed logic is a constant algorithm of work in time and a rigid internal structure that does not depend on changes in environmental factors. Only certain programmable parameters can be changed.

The open logic thermostat is a freely programmable device, characterized by a wide range of functions and settings, it can be adjusted to any operation and environmental conditions.

Unlike devices with closed logic, these devices are not so widespread. This is justified by the fact that their management requires a certain qualification degree. Therefore, not every ordinary citizen is able to understand the modes and settings of electronic thermostats. Open logic has been widely used in the industrial segment, but over time it can become an integral element of the life of any person.

Installation and setup

Before you buy and install a thermostat on a battery, you need to make sure that your heater is not equipped with a valve from the factory. This applies to steel panel radiators from some manufacturers, such as KERMI or HEIMEIER. For them, you only need to purchase the thermostatic head itself with a suitable thread and screw it into the appropriate socket.

Setting up and installing a thermostat on batteries with your own hands should not cause you great difficulties. Here are some recommendations:

1. The valve is always placed only on the supply pipeline.
2. Observe the direction of flow indicated in the product data sheet.
3. When installing, use American women so that the assembly can always be disassembled.
4. The position of the valve and head, as well as the distances to the nearest structures, are indicated in the diagram:

If the thermostat does not provide for the function of mechanical blocking of the coolant flow, then to service the radiator, an additional one will have to be installed in front of the valve, as shown in the diagram:

Mounting the thermal head

The element is fastened to the valve body in two ways - on the thread or by simple snapping, as on DANFOSS products. In any case, you must first remove the protective cap from the valve axle box, then turn the head handle to the “max” position and insert it into the socket until it clicks, or slightly tighten it with a wrench (when the connection is threaded). If the thermostatic head rotates normally, the setting is successful.

Valves of some manufacturers, as well as all heads, have a presetting function. This is an early limitation of the temperature control range, which is implemented in different models in different ways. For example, the HERZ ARMATUREN thermostat is limited with the help of special pins, in other products a key is attached that fixes the head in a certain position.

The operational adjustment of the battery thermostat is carried out with a handle with a printed scale and numbers (designations). As a rule, the smooth adjustment range is 16-28 °C, and in the “*” position, the valve will maintain an air temperature of 6-7 °C, so that defrosting does not happen.

In conclusion, a few words about the compatibility of thermostats with cast iron heating appliances. In principle, there are no contraindications to the installation, but there are doubts about the effectiveness of thermostats. Cast iron batteries are massive and contain a lot of water, and therefore are inertial and will respond with a delay to automatic regulation. So here it is preferable to put a conventional valve on the supply and a balancing valve on the return.

The heating system of the old type, as well as new equipment, must be equipped with modern devices responsible not only for ease of use, energy savings, but also safety in use. In this case, one of the most useful elements will be a thermostat. It is the thermal head for the heating radiator that will help to regularly monitor and adjust the heating system inside the house, apartment by increasing or decreasing the fluid pressure in the battery.

It so happened that when building houses, developers do not pay due attention to the competent installation of the heating system, since in most cases there is no coolant temperature regulator on the battery. However, today, due to the increase in heating prices, every property owner is trying to reduce utility costs. This is where the installation of a thermal head on a heating radiator will help.

What is the unit made of?

The design is a compact equipment consisting of two main parts: a brass valve and a thermostat, which is highly sensitive to temperature changes. The element functions independently, as a single mechanism, which does not require additional wiring of any type of energy.

Device and design scheme

The inside of the head is filled with a special mixture that reacts to the temperature of the air in the house or room. As this substance, gaseous or liquid material.

What else is included in the thermal head package?

• Cap with temperature graduation;
• Safety installation;
• Oil seals;
• valve;
• Pass-through element connected to the battery and the supply pipeline.

VIDEO: Room thermostat. Comparison of temperature control methods

How the device works

Thermostatic heads for radiators are a sealed corrugated body, which is also called a bellows. It is filled with thermal substances in the form of a gas or liquid mixture.

During operation, with an increase in temperature, the gaseous substance expands, as a result of which the bellows changes shape and becomes more straight. After that, the thermostatic valve for the heating radiator is activated, which is controlled directly by the thermal head. When the temperature of the coolant rises, the element closes the flow of water flowing into the pipes, which leads to a decrease in the temperature regime in the room.

Basic indoor modes

In the case of a lower temperature indicator, the reverse principle of operation is triggered - when the element located on the battery is compressed, the valves open, which leads to an increased flow of water into the system.

Variety and technical features

We found out how the thermal head works on a heating radiator, now you need to understand the varieties of the device in order to ultimately choose the most suitable option.

There are two main criteria by which thermostatic devices differ.

Elements can be:

• liquid;
• Gas-filled.

Each of the types has its pros and cons, in short, the first type reveals more accurate toC readings, the second ones are distinguished by reliability and fast operation.

In addition to the type of filler, the system differs in the type of control - mechanical or electronic.

Mechanical thermostat

The installation does not require additional power from external electricity.

One of the options for a mechanical device

Thermostatic heads for mechanical type radiators have the following advantages:

• low cost in comparison with the electronic mechanism;
• ease of operation;
• independence from any kind of energy.

The main disadvantage of the mechanical device is manual way valve adjustment.

Electronic installation

The automatic element is capable of adjusting the flow of water without user control. In the place where the valve should be located, there is a liquid crystal screen and a control panel.

Electronic variety, with which it is convenient to set the desired mode in a room or house

Electronic devices have two remote and built-in sensors that detect the temperature regime, convert it into a digital value on the screen.

In addition to the ability to program toC in the house for certain hours, thermostatic heads for radiators can lower the temperature in the room in the absence of the owners and raise it in a few hours so that the house has time to warm up before arrival. Also, with a long “idle” of the property, you can set the cool microclimate mode, which will not allow the heating system to freeze in winter period of the year.

This type of shut-off valve, regardless of the type, has a choice of two control systems.

Of the shortcomings automated system highlight the need for frequent battery replacement. It is recommended to purchase rechargeable batteries immediately so that they can be simply charged.

How to properly install a shutoff valve?

If the device has already been selected and purchased, the next step is to find out how to install the thermal head on the radiator. Naturally, first of all, it is necessary to choose a place where the device will be located.

Often, the battery itself is chosen as a place for installation, not covered with curtains, panels and other decorative devices. The presence of interference is a very important factor that can adversely affect the correctness of the readings.

In addition, the temperature regime of the device can be affected by:

• Sun rays;
• drafts;
• air conditioning equipment installed nearby.

There is another option for the location of the equipment - the area on the horizontal section of the system, located in front of the battery itself.

If the heating system is a two-pipe type, stepping back a little from the battery, you need to install a bypass. In a two-pipe device, installation is carried out directly on the upper supply pipeline.

Main installation steps:

• The entire coolant is drained.
• A bypass is mounted on a single-pipe device, otherwise the stage is skipped.
• The thermal head is installed in a threaded hole in the battery.
• The thread is wrapped with FUM tape to improve tightness.
• The device is being installed. It is important to position the device correctly, following the designating arrows on the body, which must be in the same direction as the water flow, otherwise the thermostatic valve for the heating radiator may fail or simply lose its operational features.

Popular Brands

Among the entire range of products, we highlight those that are most popular:

• German panels Kermi, equipped with fittings Oventrop

Kermi FKV and Kermi FKO

• Russian bimetallic Rifar, fittings included

Rifar and varieties model range

Zehnder - the most stylish cast iron

• Panel domestic production Prado

Prado Classic 22x500x1200 (2622 W) steel

Separately, a list of high quality valves in the middle price category:

Fittings Oventrop

1. "Oventrop" (made in Germany);

• CE series - one-pipe;
• ZB - two-pipe;
• ZBU - universal;
• F - equipped with a soft seal, the material of manufacture is brass and a soft seal;
• UNI is a standard circuit with an integrated valve.

1. Danfoss (manufactured in Denmark):

• RA5062;
• RA5065;
• RA2920;
• RA2940;
• RA2994;
• RA5068;
• RA5074.

Arranged in order of increasing power, they differ in structure from each other.

It is these two manufacturers that today are the absolute leaders, whose activities are aimed at saving the owner's energy resources. This applies not only to users, but also to saving resources in general.

VIDEO: How to install and configure a thermostat on a heating battery

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Thermal head for heating radiator

Herz thermostat.

Thermal head for a heating radiator - a device that allows you to high precision(±1°С) maintain required temperature in room.

The use of thermostatic fittings allows more economical use of thermal energy. Depending on the settings and ambient temperature, the thermostatic head increases or decreases the flow of coolant to a single radiator. As a result of this, not only comfortable conditions are created in the room, but also due to the fact that the room does not overheat, thermal energy is saved (depending on the model, savings can be 10-20%).

Thermal head device

The thermostatic head is a hot stamped white (black, grey, golden or transparent) plastic housing, in which a bellows container (bellows, thermoballoon) made of galvanized steel or brass is located. The container is filled with ethyl acetate or toluene - substances with a high coefficient of thermal expansion. Some manufacturers use gas condensate as a filler for the bellows tank (for example, in Danfoss RTD models), which has the fastest response to changes in room temperature.

Thermostatic fittings on the floor heating distribution manifold.

Note! There are models in which wax is used as a thermoelement, which also has a high coefficient of expansion.

The thermal head is used in conjunction with a thermostatic radiator valve (valve).

A polypropylene or stainless steel rod, under the influence of a substance in the bellows, narrows or increases the cross section of the valve passage, thereby regulating the volume of coolant entering the radiator.

A locking element is located in the upper part of the case, which allows you to fix the settings.

Thermostatic head device. Model Danfoss RTD-N.

Some manufacturers use a cone-shaped metal-to-metal connection without gaskets to connect the valve to the pipeline. This solution allows you to increase the service life and reliability of the connection, especially at high temperatures and chemically aggressive, contaminated coolant. However, to prevent the appearance of dents and scratches on the metal, it is recommended to lubricate the contacting surfaces with industrial grease before installation. O-rings and gaskets wear out relatively quickly, which increases the likelihood of leaks. In addition, the absence of sealing materials allows for frequent disassembly/assembly of the connection.

The thermostatic head for the heating radiator is equipped with a safety system that protects the heating device from freezing. For example, if the room temperature drops to +5°C - +8°C (different models have their own minimum temperature level), the thermal head automatically raises the rod, thereby launching the coolant into the radiator.

The principle of operation of the thermal head

The temperature of the air near the thermal head affects the state of the substance in the bellows container. Increasing or decreasing in volume, the substance acts on the position of the rod, thereby regulating the volume of coolant entering the radiator.

Danfoss thermostat on a panel radiator.

If the air temperature in the room rises, the substance in the bellows begins to expand, squeezing out the rod, which in turn reduces the cross section of the channel, and the volume of coolant entering the radiator is reduced. When the temperature drops, the reverse process occurs: the substance in the bellows is compressed, due to which the rod rises, increasing the channel cross section, and the volume of the incoming coolant increases.

The opening and closing of the stem is facilitated by two stainless steel springs: one returns the stem after the valve is closed, the other after opening.

Note! One of the most common problems with thermostats is the sticking of moving elements when they are not used for a long time (or if the settings have been fixed for a long period of time). This is especially true for thermostatic fittings with a pressure force on the stem up to 2 kg. To solve this problem, devices with a pressure force of 4 kg should be installed. In addition, after the end of the heating season, it is recommended to remove the thermal heads from the valves, which will extend their service life.

For the correct functioning of the thermal head, it must be periodically cleaned of dust and dirt. It should be remembered that cleaning agents and abrasive materials should not be used for cleaning.

Thermostatic element RTR 7091 for Danfoss radiator valve.

Installing the thermal head on the radiator

The connection of each specific model of thermal head must be carried out in accordance with the manufacturer's recommendations, which are indicated in the operating instructions. However, one can distinguish General requirements for installation, typical for most models:

Correct installation of the thermal head.

• Direct sunlight must not fall on the case, because. this will lead to incorrect operation of the device;
• Various interior items (furniture, protective boxes, curtains, decorative radiator grilles, window sills, etc.) should not “hide” the heating radiator thermal head from the rest of the room. In addition, it should not be located above the ascending currents of heated air (for example, above heating pipes). Otherwise, the air temperature near the head will be higher than the temperature in the rest of the room;

Danfoss thermostatic head on a steel panel radiator.

Advice! If, nevertheless, the thermostatic fittings are closed by any piece of furniture, it is recommended to use a thermal head with a remote sensor. The sensor is mounted on the wall, in a place where it is not affected by heat from the elements of the heating system, direct sunlight, drafts, etc. The sensor is connected to the head using a capillary tube 2-3 m long (maximum 8 m).

• If the thermostatic head is in a practically closed position, then for the correct circulation of the coolant through the heating system, it is recommended to install a bypass valve or a bypass line between the supply and return;
• The body of the thermostatic valve must not be under any pressure from the connected piping.

Video

heating-guide.com

The principle of operation of the thermal head for a heating radiator: 4 features of the element

The old heating systems did not have a thermostat. In the 90s, the use of these devices began, the novelty was appreciated by specialists and ordinary users.

Thermostatic kit for heating radiator

With the help of the device, you can not only regulate the temperature of a separate room, but also, if necessary, shut off the water supply. This is convenient if you need to replace part of the system - you do not need to completely drain the water and stop heating the house.

Definition and design of a thermal head for a heating radiator

What is a thermostat? This term refers to mechanisms designed to regulate the temperature of the heating system.

Thermostat

The device consists of the following parts:

• Thermostatic element - a corrugated cylinder or head with a thermostatic composition.
• Valve. It is used when adjusting the flow of liquid, reducing or increasing it. There are 2 types of valves: RTD-G and RTD-N. The first is used in a single-pipe heating system. The second - with two-pipe heating or if there is a double pump in the house.

The thermostat works as follows: when the water in the pipe is heated, the composition expands and the size of the cylinder changes. The thermostatic head moves the valve stem, reducing the flow of fluid.

According to the type of adjustment, the device is divided into:

1. Mechanical temperature controller. The adjustment is made with a valve.
2. Mechanical devices connected to the network. They are regulated by a handle, but the electronic system closes the key.
3. Mechanisms with electric servo drive. The signal is transmitted from the thermostat located in the room, after which the servomotor regulates the water supply.
4. Electronic devices. The water temperature is controlled by buttons.

Thermostatic valves: types, selection, principle of operation

Manufacturers offer various types of valves. It all depends on how the pipes are connected to the radiators.

• Direct valves - used for direct pipe connection to the battery near the surface of the walls.
• Corner - the pipe is brought from under the floor.
• Axial - the connection is made from the surface of the wall.

Electronic battery regulator

The valve for heating with a thermostat operates without being connected to the power supply. The composition inside the thermostatic cylinder increases in volume when exposed to high temperature and decreases when it is lowered. If the room is cold, the valve increases the flow of hot water, if it is hot, it decreases.

By turning the handle on the head with a scale from 1 to 5, the desired temperature is set. Comfortable for a person is considered a temperature of 20-23 degrees, above - 25 for the bathroom. At 1 position, the thermostat maintains a temperature of about 6 degrees so that the water does not freeze, the 5th position means that the system is operating at full capacity. The thermostatic valve allows you to save 25% of heat, thus reducing costs.

Separately, consider a three-way thermostatic valve for the radiator.

Three-way mechanisms are:

• Standard mixing.
• With thermostatic function.

Of particular note three-way valve with thermal head. According to the principle of operation, it resembles a mixer: mixing, switching fluid flows. When the handle is rotated 50 degrees, the two streams are evenly mixed, since the inlet valves are equal. If the handle is turned 100 degrees, the first valve is fully pressed and blocks the flow.

Three-way thermostatic mixing valve is:

• with hydraulic drive;
• pneumatic drive;
• electric drive.

A three-way valve on a heating system with a thermostat function differs from a standard three-way model in that it maintains the temperature at a given level.

Thermostatic head: principle of operation

The thermal head for a heating radiator works in conjunction with a valve. Fixing is done with a nut. The thermal head for the heating radiator consists of:

• from a sealed cylinder;
• bellows with thermostatic component;

The method of operation is simple: when the liquid is heated, the bellows increases, moves the valve and it reduces the supply of hot water. The mechanism regulates the temperature range from 6 degrees to 30.

Thermostatic head for setting the optimum temperature

The thermostatic head is of the following types:

• gas condensate;
• liquid.

When choosing, you should take into account: different heads are used in liquid and gas condensate thermostats.

The first are filled with acetone or toluene, in gas condensate - liquefied gas. The latter are more sensitive to temperature fluctuations.

The temperature level is shown by sensors connected to the cylinder.

Sensors on the heads let in the following types:

• remote;
• built-in.

Remote sensors are connected to the mechanism with a special tube, built-in sensors are mounted in a thermostat. A room thermostat is also produced, which is installed separately. It measures the room temperature and sends a signal to the thermostat. Thermo head for a heating radiator with temperature control - it is very convenient to use the heating system.

Thermostatic sets: the price is responsible for the quality

Strictly speaking, a thermostatic kit is a device that includes: a cylinder, a valve, a thermostat with temperature control, by rotating which the thermal regime of the room is manually set. After, the device supports it automatically.

In addition, the kit may include:

• Radiator plugs.
• American for battery connection;
• Brackets for mounting.

The operation of the thermostat allows you to maintain the temperature at a comfortable level for a person. During the day - 20-23 degrees, at night - 18.

One of the alternative temperature measurement devices is a thermocouple (GOST R 8.585–2001). The principle of operation of a thermocouple is the operation of dissimilar conductors that are in contact with each other at one or more points. When heating occurs, a certain voltage is created.

Control fittings (sets) are installed on each radiator separately.

Proper installation of the thermostat Danfoss, Oventrop, Giacomini, Valtek with a remote sensor

Installing a thermostat on a heating system

How to install the thermostat correctly? When installing it on a two-pipe heating system, the following conditions must be met:

The thermostatic head for the heating radiator must be in good working order.

Thermal regulators should not be exposed to direct sunlight, curtains, battery screens should not be closed. The air in the immediate vicinity of the device must circulate.

Installation of a thermostatic device is as follows:

• The device is always mounted on a pipe with hot water supply (in a two-pipe system - the top pipe). A shut-off valve or throttle is installed on the return line. When installing, pay attention to the flow of hot water. The hose must fit to the thermostat valve and the throttle needle from under the saddle. In another scenario, the stem will fall off the valve.
• Linen thread with paint or polymer sealing thread is used for winding onto the thread. FUM tape is not suitable.
• There must be a jumper on the connections before the throttle. Without it, the temperature in the riser is adjusted.
• To connect valves with radiator plugs, it is preferable to use an American.

For steel one-pipe radiators, a different type of thermostat is used. Its design implies only the bottom connection.

The main problem with installing a thermostat is the compatibility of parts produced by different manufacturers. A similar situation is observed when flat bottom-mounted radiators with a valve insert are purchased. It is necessary to carefully select a thermal head for it in order to match the thread diameter and the length of the valve piston.

Models are produced on the market, the details of which are combined with other brands. But such a mechanism, although it will form a single whole, is not able to provide a constant temperature regime.

Mechanism adjustment

Temperature controllers for radiators are first started as follows:

• The throttle on the return line regulates the system.
• The thermostatic tap on the battery opens fully.
• The handle on the thermal head is removed and installed in such a way that the maximum position on the scale corresponds to a fully open valve. The device is installed. Further temperature adjustment is made by turning the handle.
• If the temperature on the display is shown in degrees, it is adjusted using a thermometer.

Using thermostats on heating radiators can achieve a number of advantages. With the rise in prices for the supplied heat, money is saved. The device pays for itself in 1-2 seasons. Comfortable temperature conditions prevent the occurrence of colds that occur due to frequent airing of rooms in the off-season. The thermostat for heating is installed in a new heating system and in an existing one. Modern models of small sizes, fit into any interior design. The thermostatic head for the heating radiator must be in the heating system.

trubexpert.ru

How to properly install the thermal head on the battery

1. What do you need for installation?

2. About the principle of operation of the thermal head

To understand how to properly install the thermostatic head on the battery, it is important to understand its design. When the principle of operation is clear, it is easy to avoid installation problems.

The valve consists of two parts - a control valve and a thermostatic element. Rotate the knob to set the temperature. At the same time, they are guided by a scale with numbers or dots - they combine the desired one with the risk on the case. Between the valve seat and its cone there is a distance that determines the amount of water coming from the heating system to the radiator. The movement of the cone is controlled by a thermostatic element. It reacts to changes in the air temperature in the room due to gas condensate filling - a heat-sensitive liquid. Thus, there is an automatic adjustment of the heat carrier flow depending on the change in the air temperature in the room. It is kept at the same level, comfortable for the user, for example, 20 - 22 ° C.

Maintaining a constant temperature in the room is the main advantage of the thermal head. To lower it, you do not need to open doors and windows (this is especially not beneficial for the owners of their own boiler room - after all, the resources spent on heating literally fly out the window). The use of control equipment saves 10 - 20% of thermal energy. And finally, another argument in favor of installing a thermal head on a battery is a fairly simple installation and independence of its operation from the mains.

As you can see, the principle of operation of a conventional mechanical thermostatic valve is quite simple. However, the accuracy of its operation largely depends on the correct installation. Therefore, before talking about the installation process, we will tell you how not to install the thermal head on the battery.

3. Common installation errors

The most common mistake is the vertical position of the head above the valve at the top of the radiator. Many users find this method aesthetic and convenient. But this negatively affects the operation of the element. The fact is that the hot air rising from the pipe heats the head - the temperature in this place becomes much higher than in the room. The device perceives this as exceeding the comfort level, decides that the room is hot, and turns off the radiator. As a result, the room ceases to be heated.

Incorrect installation locations also include areas where the air temperature is very different from the average temperature in the room. For example, the radiator is hidden in a niche, and a thermal head is installed there. It reacts to heat in an enclosed space and turns off the radiator. The same thing happens if the valve is located deep under the window sill, is under direct sunlight, is closed by thick curtains, furniture, etc. Another incorrect option is to install a thermostatic valve in a place that gets under the cold air flow, for example, at the edge of a window opening, where there are often drafts. In this case, the device will "think" that the room is cold - the heating temperature will rise, and unbearable heat will begin in the room.

As you can see, the wrong place to install the thermal head practically nullifies the point of using it. According to experts, it is better not to put a valve on the radiator at all than to carry out incorrect installation.

Remember: the installation location of the thermostatic head must be one that reflects the average air temperature in the room. Then the device will correctly respond to the temperature and maintain a comfortable mode.

4. Step by step instructions for correct installation

Preparatory work

Usually, the installation of a thermal head on a battery is carried out along with the installation of new radiators. To do this, you need to block the riser and drain the coolant remaining in the pipes into the bucket. It is best to carry out work not during the heating season.

Selecting the location of the thermal head

Given the errors in the installation of the thermostatic head, which we discussed above, we can draw conclusions about where exactly you should not install the thermal head. What will be best options? It is important that heat flows from the radiator do not fall on it and that factors that can cause a false perception of temperature are not affected.

The photographs below show common options for correctly installing a thermostatic head on batteries. If it is mounted at the top of the radiator, it should only be placed horizontally. In the lower part, it can be mounted horizontally and vertically, since there are no strong thermal flows of heated air - it rises up.

Making threads on pipes

To fix the head on the radiator, it is necessary to cut the threads at the attachment points. To do this, threads are cut on the spurs coming from the riser and radiator using a die.

Head mounting

A lock nut is screwed to the drive coming from the riser. It is wrapped with a tape, and a thermostat is screwed onto it, but the fasteners are not tightened. Next, do the same with the drive coming from the radiator. The installed thermal head must be fixed - simultaneously with two wrenches tighten both nuts.

Device setup

Close all windows and doors to keep heat out of the room. Set up a stand in the center of the room, for example, put a stepladder. Place a thermometer on it. It should be at a height equal to half the height of the room. Turn on the thermal head valve to the maximum. The room will warm up to the maximum temperature. Follow the thermometer readings. The thermometer will rise: as soon as the temperature rises by 5 - 7 ° C, turn the thermostat knob to opposite side. The coolant flow will decrease, which means that the temperature in the room will begin to decrease. Watch for a drop in thermometer readings. When you see the desired value, for example, 22 ° C, turn the knob of the thermal head to increase until you hear the sound of water in its body. You can remember the position of the handle and make a mark on the case. Leave the thermostat in this position. Some devices have a temperature scale, and during the setup process you just have to refer to it.

Tip: at the end of the heating season, remove the thermal heads from the radiators. Prolonged inactivity can lead to sticking of moving parts of devices. If you remove them, you will extend the service life important details.

Now you know how to properly install the thermal head on the battery and how to avoid mistakes. You can easily cope with this task. It remains only to buy everything you need for installation - you can do it in our online store. We offer only branded products: radiators and thermostatic heads for them. Do not forget to purchase related items: a Mayevsky faucet, shut-off valves and other useful little things that no heating system can do without. If you need advice, call the manager of our company. It will help you choose everything you need.

5. Useful articles

How to bleed air from the battery? Learning to use the Mayevsky crane

Do-it-yourself installation of heating batteries in a private house

If necessary automatic regulation temperature in the interior, a thermostatic head for a heating radiator is used in combination with a thermostatic valve. A set of this equipment allows you to get a different temperature in each room without human intervention.

Thermal head for heating radiator

Video: thermostatic valve operation on a steel panel radiator

Classification and principle of operation

Apart from the valve, a thermal head for a heating radiator is completely useless, since a sensor is located inside it, which is triggered by a change in temperature in the room. The bellows chamber contains a solid, liquid or gaseous substance that changes volume.

Thermal head and valve separately

The chamber is connected to a stem that either closes the thermostatic valve completely or opens it to the adjusted level. This is the main difference between a thermal valve and a control valve, which can slightly reduce / add a coolant flow inside the heating register.

Thermal head device

Thermal head and valve in section

Attention! A thermal head for a heating radiator with a valve can only be installed in bypass systems of one-pipe systems. When the valve is actuated, the flow is completely blocked, so the circulation in the heating circuits stops. The bypass tube completely solves the problem.

Thus, a valve first cuts into the coolant supply pipe to the heating radiator, and a thermal head is screwed onto it perpendicular to the liquid flow. There are several modifications of the thermal head:

• for one-pipe systems - produced by a limited number of companies, for example, models RA-G, RTD-G from Danfoss;
• for two-pipe systems - in any store, 97% of the assortment of heads are of this type.

Thermal head for one-pipe and two-pipe heating distribution systems

You can visually distinguish heads for a 2-pipe system by the size of the adjusting cap and color. Devices for single-pipe heating circuits are larger, have a gray, white color. Small diameter red caps are fitted to high pressure, low flow two-pipe heads.

The arrows on the body indicate the direction of the coolant flow, installation against the arrow is prohibited. Therefore, when choosing, it is necessary to take into account whether hot water enters the batteries from below or from above. different rooms apartments.

The principle of operation of a thermal head for a heating radiator is extremely simple:

• the user sets the required value of the air temperature in the room, for which the device has a scale with divisions (for example, 21 degrees usually corresponds to a value of 3);

Thermal head scale adjustment

• when the temperature rises by 1 degree, the substance inside the bellows chamber will heat up, increase in volume, and press on the valve stem;

Thermal head operation in a system without bypass

• the supply of hot water to the battery will be completely blocked, however, circulation in the heating circuits will continue through the bypass;

Design differences between single-pipe and two-pipe systems

• a non-functioning register will lead to a decrease in temperature, the volume of the substance in the bellows will decrease, the pressure on the stem will disappear, the valve will open.

The room temperature control technology in this case is effective only for radiators with minimal inertia. Bimetallic, aluminum, steel batteries cool down / heat up faster, therefore they are optimally suited for automatic adjustments with thermal heads. Cast iron radiators heat up for a long time, accumulate heat, cool down longer, so the efficiency of adjustments with thermal heads is reduced.

Using thermostats on cast iron radiators is not the best option.

In order for the thermal head for the heating radiator to have the maximum efficiency in adjusting the microclimate in the rooms, it must be installed correctly. The main mistakes home masters traditionally make are:

• vertical placement on the valve - so that the device does not stick out to the side, does not interfere with walking near the battery, wet cleaning, it is mounted vertically, while the bellows is heated by heat flows rising from the valve, so the head should be placed horizontally outward;

Incorrect installation of the thermal head on the heating radiator valve

• installation in niches - in confined spaces, convection decreases, heat accumulates behind curtains, under window sills, the temperature of the head drawdown is not reflected correctly;

Installing a thermostat behind curtains leads to incorrect temperature detection

• installation in downward flows at the window sill - the bellows are intensively cooled by a draft from the window, the vents stop working.

It is considered optimal to adjust the thermal head for a heating radiator using a remote sensor placed on the walls. The industry produces heads with tubes within 2 m, which allows you to normally remove the sensor from the heater, drafts from the window.

Device with remote sensor

Thermostatic remote control head

Related article:

Temperature controllers with air temperature sensor. A separate material provides a practical guide to the selection and installation of temperature controllers.

Self-installation of the thermal head on the heating radiator must be carried out on the supply line after the bypass before the register. For ease of use, manufacturers produce heads of several types, classified by signs:

• adjustment - manual or pre-settings (set with a special key by a plumber);

Adjustment with a special key

• installation - left / right of the battery, axial, angular, straight, three-way for installation in the bypass;

Different types of thermostatic elements

• thermoelement - wall sensor, remote controller or built-in bellows;

Electronically controlled thermostatic head for heating radiator

• bellows working substance - budgetary paraffin heads, liquid devices of average cost, expensive gas thermoelements;
• heating system - the throughput of heads for single-pipe systems is an order of magnitude higher.

Helpful advice! The thermal head in 90% of cases is used to lower the air temperature. However, in a country cottage, by installing heads with valves on all registers, you can raise the temperature. In the rooms farthest from the boiler, the heat loss in the heating circuit is maximum. Therefore, when the supply is shut off in the near registers, hot water better heats those far from the boiler room.

How to mount the thermostatic head

Thermal head setting

After the user has become familiar with the design of the device, learned how the thermal head works on a heating radiator, setting the optimal microclimate in each room is not difficult. By turning the handle relative to the scale with marks, you can adjust the temperature within +5 - +28 degrees.

Thermal head settings are carried out by turning the knob on a digital scale

In the first case, the system is guaranteed not to freeze in the absence of the owners inside the building of periodic operation. The maximum value is considered comfortable for users. The substance with which the bellows chamber is filled responds to an increase / decrease in temperature within 1 degree. Therefore, the on / off cycles of the valve will occur regularly.

Thus, any home master will be able to select and mount the thermal head together with the valve. To do this, it is enough to take into account the above factors, to avoid the main installation errors.

Video: how to choose the right thermostatic head

homemyhome.ru

The design of the thermal head for a heating radiator

To ensure maximum efficiency of the heating system in your home, it is not enough to choose a good boiler, pipes of the correct diameter and radiators with a sufficiently large heat exchange area. The heating device is always associated with a number of smaller parts - it is necessary to install various fittings and thermal heads for radiators.

Why install complicated regulators when simple shut-off valves are often enough to adjust the air temperature in the house, reducing or increasing the flow of water in the pipes? The fact is that the thermal heads installed on the radiators in the house are devoid of some of the shortcomings of the shutoff valves, and also allow you to more accurately adjust the temperature of the radiators. Thanks to fine adjustment, you can create the most comfortable climate in the house, as well as save some on heating.

Subtleties of setting heating with shutoff valves

What exactly are the shortcomings of taps and valves, which necessitate the installation of thermal heads? When choosing shut-off valves as a means of adjusting radiators, you need to be prepared for the following points:

• Balancing with the help of fittings can only be performed by setting it to the “open” or “closed” mode, that is, either the heating will work at maximum, or it will not work at all. It is impossible to open the tap slightly, since in this case the water under pressure will quickly break the fragile parts of the fittings. All this leads to the fact that from the heat people now and then open windows instead of reducing the heating of the batteries, which leads to inefficient waste of energy.
• Rapid opening of a faucet can lead to water hammer - pressurized water will rush into the radiator, damaging it or at least reducing its strength and durability.
• All manipulations with balancing valves can only be done manually: in order to constantly have a comfortable temperature, you need to constantly run to the radiator and turn it on and off.

All these problems are easily solved by installing heating thermostats. They not only allow you to make the temperature constantly lowered. The thermal head for most radiators can be equipped with an automatic adjustment system, which eliminates the need to twist something with your own hands.

The design of the thermal head and the principle of its operation

So, what is a typical mechanism for fine-tuning a heatsink? The design includes two main elements - a thermal valve and a thermostat. They work as follows:

1. The bellows is filled with volatile vapor or liquid and is under constant pressure.
2. The pressure value always corresponds to the filler heating value, and the adjustment is carried out due to the fact that the spring in the bellows is compressed with a certain force.
3. When the ambient temperature rises, some of the fill material evaporates, which leads to an increase in pressure inside the thermal head.
4. The spring unclenches, the bellows increases, which leads to the movement of the spool in the valve towards closing the pipe lumen, which prevents the coolant from entering the radiator in too much quantity.
5. This continues until the equilibrium of the system is restored.
6. If the air temperature drops, the vapor in the bellows condenses, the pressure decreases, and the bellows becomes smaller.
7. The reduced bellows acts on the spool in such a way that it begins to open the passage for water until, again, the radiator warms up to the desired temperature.

Do not worry about the fact that the bellows will react to the temperature of the coolant instead of the air in the room. The bellows filler is located at the maximum distance from the part of the device heated by water, so the sensor is not exposed to hot water.

However, it can be affected by heated air emitted by the radiator itself. To avoid this, the thermal head for the radiator must be installed in a horizontal position.

Varieties of thermostats

The thermal head for heating radiators can have one of two types of thermostat:

The principle of balancing the heating system using a manual thermostat is simple: turning the valve causes the valve stem to move from its place, thereby changing the pipe clearance in accordance with the selected temperature value. Of course, the efficiency of the device in this case is somewhat lower, and the valve handle may fail over time due to frequent mechanical impact.

The design of the automatic regulator includes a bellows, the principle of operation of which was described above. Often, such thermal heads for modern radiators are equipped with digital sensors and displays, which makes the temperature setting process very simple.

Valve design

So, the thermostat is needed to, in fact, adjust the temperature manually or automatically. . The second main part of the thermal head - the valve - is needed in order to directly affect the flow of the coolant by adjusting the diameter of the lumen of the supply pipe. The valve can be installed on a straight or angled section of the circuit and is made according to one of two standards: RTD-G or RTD-N. The choice of a specific type of device is based on the type of heating circuit, and the standard is selected based on the diameter of the supply pipe.

What is the difference between the two generic valve manufacturing standards?

RTD-G can pass through itself large quantity coolant and is designed for the following situations:

• one-pipe heating systems;
• multi-story houses;
• private houses with a two-pipe system with natural circulation.

It is important to remember that single-pipe systems must be equipped with bypasses without fail if the radiators are equipped with thermostats.

RTD-N is suitable for:

• houses with forced circulation of the coolant in the heating circuits;
• multi-storey buildings with two-pipe heating.

Choosing the optimal thermal head

The key to the reliability and efficiency of any heating is that the thermal head for heating radiators must be correctly installed.

The first parameter on the basis of which the choice is made is the type of filler, if the regulator is automatic. According to this principle, thermostats are divided into two types: liquid and gas. Devices of the first type more accurately adjust the valve to the needs of the inhabitants of the room, but the thermal inertia of such devices is slightly higher than that of gas regulators. Thus, gas-filled thermal heads balance the temperature less accurately, but noticeably faster.

The second principle of choice is the type of signal applied to the valve. Thermal heads for radiators can be actuated based on the temperature:

• water in pipes;
• air in the room;
• air outside.

Regulators of the first type are less accurate - the setting error can vary within 1 - 7 degrees. Often, such a spread does not suit the consumer, therefore, regulators that receive information from the air are most often used. They sensitively react to changes in the temperature balance between the radiator and the air in the room and, accordingly, adjust the flow of water, maintaining the conditions required by a person in a fully automatic mode. Control can be direct or electric. In the first case, the thermostat will receive information about the change in temperature from the coolant. Changing the mode is carried out by turning the valve knob, on which a scale is applied, which is easy to navigate.

Electrical control is divided into two subtypes:

• control of a circulation pump or heating boiler;
• signaling to mechanical valves, which are installed next to the radiator - in this case, you can adjust all the radiators in one motion.

Placement of thermal heads

Where to insert this heating control? There are many options: sensors can be remote and built-in, adjustment can be direct or remote.

Balancing valves with a built-in sensor are more common. They are located, as the name implies, by embedding the mechanism in the pipe of the supply circuit. The installation of radiators should be designed taking into account the following nuances:

• if you have to mount the regulator vertically, you need to choose a device of a different type, since the convection of warm air will greatly affect the accuracy of the automatic balancing - the adjustment will be carried out with a large error, since it will be based on the warm air near the radiator, and not on the temperature of the bulk of the air in room;
• therefore, the sensor must be installed strictly horizontally (parallel to the floor).

The thermal head for aluminum radiators with an external temperature sensor is used in the following cases:

• radiators are mounted in such a way that the thermostat bellows are tightly covered with a curtain, and air access to the mechanism is difficult;
• warm air flows will affect the functioning of the built-in thermal sensor;
• the radiator is located under the window, from which cold air from the street comes through;
• the vertical position of the heating thermostat cannot be avoided.

The remote temperature sensor is connected to the main structure of the thermal head using a thin tube of sufficient length.

Setting the remote electrical control it is intended in situations where heating devices, whether they are radiators or convectors, are mounted in places inaccessible for convenient manual adjustment - for example, if convectors built into the floor are covered with a decorative grille.

When mounting the thermal head on bimetallic radiators or other types of devices, you must follow the main rule - in order for the sensor to respond adequately to changes in the air temperature in the room, this air must be able to circulate freely around the sensitive part of the mechanism.

The best and often the only correct solution- installation of the thermostat parallel to the floor, since in this case it will not be affected by warm air flows from the pipe and the heater itself (hot air goes vertically upwards). Another rule that must be observed is that the arrow on the body of the device must be directed towards the flow of hot water in the circuit, otherwise everything will immediately become unusable.

An external sensor is required in the following situations:

• installation of the heating device is carried out in a niche;
• the depth of the device exceeds 16 cm;
• the thermal head for heating radiators is covered with a curtain;
• above the radiator wide window sill, installed at a distance of less than 10 cm from the upper edge of the heater;
• there is a vertical arrangement of the balancing mechanism.

Of all these conditions, it is curtains that have the greatest influence on the effectiveness of balancing. They become a screen that prevents the sensor from reacting to the conditions in the room. Of course, they can be pushed back to allow air access to the bellows, but a remote sensor will solve this problem just as easily.

Mounting the thermal head

Before installation, it is necessary to shut off the coolant in heating circuit. After draining the water, you can begin to install control valves on radiators. Installation is carried out as follows:

• pipes at a short distance from the radiator are cut;
• old shut-off valves are dismantled;
• the shanks are disconnected from the valves, after which they are wrapped inside the plugs of the heater;
• the strapping is assembled and mounted at the selected place;
• pipes are connected.

More detailed instructions can always be found in the thermal head manufacturer's manual. The main thing is to remember that the mechanism must be co-directed with the flow of water in the circuit.

The temperature setting can be made within 6 - 26 degrees. The set temperature will be maintained automatically. To adjust, turn the thermostat knob until the notches align with the marks on the body. These labels correspond to a certain temperature regime.

How to choose and install a thermal head on a heating radiator. Press!

Today, about 40% of the energy produced is spent on heating and ventilation of buildings. Alas, in our country this figure is several times higher than in developed countries.

That is why the issue of energy saving is a very acute problem, given the ever-increasing cost of energy for domestic purposes.

To do this, it is advisable to install temperature controllers on batteries, which can reduce the cost of maintaining heat by almost a quarter. However, at the same time, such devices still need to be correctly selected so that they fit a particular heating system and install them correctly.

• 1 How does a thermal valve work
• 2 How to choose
• 3 How to install

How does a thermal valve work

The thermal head is needed to regulate the temperature of the radiator.

The very first versions of thermostats that were installed on heating radiators were created in 1943 by DANFOSS. After several decades, such devices have undergone many changes, as a result of which they have become more accurate. Their design consists of several parts: a valve and a thermal head. At the same time, they are connected by a special locking mechanism. The purpose of the thermal head itself is to measure and analyze the temperature and influence it by using a valve mechanism for this mechanism that opens and closes the flow of water to the radiator.

This adjustment method is also called quantitative due to the fact that the device changes the temperature by changing the amount of coolant that passes through the heating radiator. There is also another method, which is called qualitative. Its principle is to change the temperature of the water directly in the system itself. The mixing unit, which is usually installed in the boiler room, is responsible for this.

Inside such an element is a bellows, which is filled with a temperature-sensitive medium.

In this case, the latter can be of several types:

• liquid;
• gas-filled.

It should be noted that liquid versions are easier to manufacture, but their performance is lower than that of gas ones. The essence of their work is as follows: as the temperature rises, the substance inside expands according to the laws of physics, due to which the bellows stretches. Further, the latter reduces the size of the valve section by moving a special cone. Ultimately, the coolant consumption is reduced. When the air in the room cools, the process is reversed.

How to choose

When choosing a thermal valve, you need to take into account all the available features of the heating system

Based on the characteristics of the heating system, as well as the conditions of its installation, in order to control the temperature, it is possible to use various combinations of valves and thermal heads.

So, for example, for use in single-pipe systems, it is worth using valves with a higher throughput.

The same applies to those two-pipe systems in which water is circulated by gravity, that is, in a natural way, without forced mechanisms. In cases where a two-pipe system is used, where there is a circulation pump, it is recommended to choose those types of valves where it is possible to adjust the throughput.

After selecting the valve, it is necessary to select the thermal head.

The most common options that you can buy today are:

• having an internal thermoelement;
• electronic (which can be programmed);
• having an external temperature sensor;
• anti-vandal;
• with an external controller.

Most often, classic thermostats with an internal version of the sensor are installed in cases where their axis is in a horizontal position.

Please note: the thermostat must not be installed vertically, as the heat emanating from the body piping will greatly affect the bellows, due to which the entire device will not function correctly.

In cases where it is not possible to carry out horizontal mounting of the head, it is best to install an additional remote temperature sensor with a special capillary tube.

Except vertical options installation, there are also other reasons to purchase a remote version of the sensor:

• in the event that heating radiators with a temperature controller located on them will be located behind the curtains;
• when there is any other heat source near the installed thermal head;
• if the location of the battery is under a large window sill.

Very often, in those rooms where the requirements for the interior are increased, the batteries are covered with decorative screens. Due to this, the internal thermostat will register only the temperature that is inside this casing. This will block access to the thermal head adjustments. Therefore, in such cases, it is recommended to opt for a remote controller with a temperature sensor.

Worth knowing: if you have not yet purchased heating radiators, you can buy Kermi models with already built-in temperature sensors.

If we talk about electronic thermostats with a display, then they are of several types, the first has a built-in control unit, and the second has a removable one. The latter have the feature of being able to detach from the thermal head, while it will continue to work in the same mode. The purpose of such models is the implementation of temperature control in different modes, at different times of the day. This makes it possible to reduce the level of heat during the day, and at night, when everyone in the house is asleep, raise it to the desired level. Due to this, it is possible to significantly save energy.

If there are small children in the family who always want to touch and twist everything, it is recommended to install anti-vandal thermostats. This will protect the device settings from unauthorized interference. The same situation applies to options installed in various public buildings, from kindergartens to hospitals.

How to install

For correct operation of the thermal valve, its installation must be carried out in a horizontal position.

It is not necessary to install thermal heads on every heater that is located in the living room. There is a rule here, according to which, only those radiators that have a total of a little more than 50% of the power should be regulated. For example, when there are 2 heating elements in the room, the thermostat must be set to a more powerful one.

Please note: in the case when cast-iron radiators are used, the use of thermal heads will be extremely inefficient. The reason for this is that, in essence, such heating batteries are inert, due to which the adjustment will be carried out with a long delay. Therefore, installing thermostats on them does not make sense.

It is best to install the valve on the supply pipe when the battery is connected to common system. If you need to embed the device into an already assembled heating circuit, it will be necessary to dismantle some elements, as well as cut pipes (if they are metal, then this is a very big inconvenience), having previously turned off the tap.

Installing the thermal head, after mounting the thermostat on the battery, is very simple. You just need to combine the corresponding marks on the cases, and then fix the device with a smooth pressure. A click will signal that the mechanism is locked.

It is more difficult to install the anti-vandal version of the thermostat. To do this, you will need a hex wrench with a size of 2 mm. First, using dowels, you need to fix the mounting plate on the wall, and then fix the case on it. Next, the capillary tube is attached directly to the wall using plastic clamps. Now, having combined the required marks, it is necessary to easily press the thermal head, and then tighten the fixing bolt on it using a hex wrench.

In addition to the usual temperature control, on the thermostats it is possible to set minimum and maximum values, beyond which it will be impossible to turn the wheel. To do this, there are limit pins at the back of the device.

In general, it is not so difficult to make the selection of the most suitable thermostat, the main thing to remember is that it is necessary to choose options for the existing or planned heating system, as well as how they will need to be installed. It is best to use Danfoss programmable models, which will significantly save on heating.

Watch a video in which a specialist explains what a thermal head for radiators is, what it is for, how it works and how it makes life easier and saves you money:

heat.guru

Thermal heads for heating radiators: device and installation features

When deciding to create an autonomous heating system in the house, the owner expects it to be reliable enough, demonstrate high efficiency in operation and require a minimum of maintenance costs. Despite the fact that this task has many solutions, most often the owners choose a method such as installing heating radiators with thermostats. Their peculiarity is that these devices are able to maintain the thermal regime in the room at the required level.

Naturally, these devices also have alternatives, which are shut-off and control valves and ball valves, as well as cone valves. However, due to the disadvantages inherent in these products, their use is not effective.

Features of temperature control with ball valve and valve:

When starting to install radiators using a valve or a ball valve, it should be borne in mind that:

An effective solution, allowing to eliminate these shortcomings, is the addition of such a device as a thermal head to the system. With this device, it is much easier to adjust the heat transfer. Accordingly, the owner has the opportunity to reduce heating costs.

Design of thermal heads

Despite the fact that today there are many thermal heads from different manufacturers available on the market, in general they have a common device, which can differ only in individual elements.

The basis of the design of these products is formed by two nodes, which are independent devices:

• Valve;
• thermostatic element.

The main purpose of the valve is to adjust the water supply process. Straight and angle valves are available for sale. Also, this element can be manufactured in standard solutions RTD-G and RTD-N.

The principle of operation of devices

If the radiators are equipped with such a thermostat, then there is no danger that it will acquire the same temperature as the water circulating in the water supply. This is due to the design of these elements, due to which the regulator is activated only in cases where there are fluctuations in the air temperature in the room. This effect is achieved by the steam from the bellows, which in any situation accumulates in the coldest zone of the device. Thus, it is always located at the maximum distance from the valve, to which heat from the water is transferred.

It is very important to provide protection from the warm air that the heating radiator creates. This problem can be solved by thermal heads, which must be placed strictly horizontally. Although most often they do this, you can do everything differently - install a remote sensor.

Thermal head selection

At the stage of choosing a thermostat, one should pay attention to such a characteristic as filling, which can be liquid or gas-filled. If a liquid is used, then the capabilities of the device allow you to tell the actuator how much the temperature has changed. But the liquid device has a serious disadvantage: it demonstrates increased inertia, which is how it differs from gas-filled devices. The use of the latter does not allow achieving a high-precision response from the actuating element, however, all of them will do this much faster.

Even before deciding on the brand and model of equipment, you need to decide how exactly their measuring unit will be installed. Let's say about thermal heads for Danfoss radiators, it can be noted that they provide several options: with a remote or built-in sensor, and there are also models that allow you to control the operation of a thermostatic element at a distance using a special remote control.

Most often on radiators you can find thermal heads with a built-in sensor. Already by the name of this category of devices, you can understand exactly how the active element is placed. When installing heating radiators that are equipped with thermocouples of this type, it is important to remember that:

1. If vertical placement is more suitable for the element, then you should consider purchasing other devices. The fact is that when using the built-in temperature sensor, there will be small inaccuracies in the work, the cause of which is the increased heating created by the outgoing convection currents.
2. For sensor this type only horizontal placement is allowed.

It is worth thinking about installing thermostatic elements with the possibility of remote control only when the layout of the heating devices does not allow the owner to reach them. Among the category of devices under consideration, consumers quite often install the Danfoss R. A. 5068 or RA 5074 models.

Installation and commissioning technology

Mounting

The installation of heating radiators is accompanied by the placement of a valve on the inlet of the heating radiator, for which a standard wrench is used. Moreover, it should be placed so that the coolant circulates in the same direction as the arrow on the body. For the correct installation of thermostatic elements, it is necessary to follow the instructions that, in most cases, manufacturers attach to the packaging of the equipment. It is worth noting that you can choose the optimal thermal regime even before installing the sensor. You just need to perform the necessary manipulations with the protective cap, which is located on the valve body.

Thermal head setting

thermostatic elements allow you to select any temperature within the range of 6–26 ˚С. This makes it possible to adjust the thermal regime, taking into account the characteristics of each specific room in the house. Subsequently, you do not have to monitor the temperature, as it will be maintained automatically. If necessary, it will be lowered or increased.

Changing the thermostat settings is quite simple. This is done by moving the handle to a position in which the indexes on the body are aligned with the mark or arrow. Using these indices, it is easy to understand in what temperature regime the thermal heads for radiators operate.

Also, the user has the opportunity to adjust the temperature range Xp (P-zone). If it exceeds critical values, then this will lead to the transfer of the valve cone from one extreme position to another. If the radiators are equipped with thermostats designed for European standards, then for the latter this parameter has a value of 2 ˚С.

Particular attention should be paid to the P-zone: it will decrease as the capacity of the valve decreases. If required, the owner has the opportunity to set the lower and upper limits for the operating range. For more information about this parameter, you should look at the instructions that came with the device.

Thus, for the effective use of such a device as a thermal head, one should not only choose it correctly, but also configure it. Then, in addition to creating an optimal thermal regime, the owner will have the opportunity to save on heating. After all, most often consumers do not realize that each of them has the opportunity to pay less for heating their home. Moreover, in order to fully experience the full benefits of such a device as a thermal head, it is not necessary to make major changes to the design of the radiator and spend a lot of money for installation.

The efforts expended are fully compensated by the positive effect, which is not limited only to the creation of an optimal microclimate.