Radiator thermostats – how to choose and install

It is necessary to regulate the coolant inflow rate to the radiator to provide optimal temperature conditions in the room and optimization utilities costs. With this task perfectly cope thermostats radiators.

Consider the features of the work and the installation of various types of thermostats, the basic criteria for the selection of quality, reliable thermostat batteries.

The need to use the thermostat battery

At arrangement of the heating system, many wonder: "Do I need a thermostat to the battery." To date, when the bills for the consumed heat population steadily increased, the answer is an unequivocal "Yes."

Very often the tenants of apartment buildings have to open windows in winter to reduce heat from the heated panels. coolant energy is spent inefficiently. This is particularly noticeable for those who heat meters are installed.

Temperature controller (thermostat) radiator is a device which controls the indoor climate. Some models have the ability to program temperature at different times of day (day / night) and every single day.

Use in conjunction with the thermostat heat meter - an effective way to reduce space heating costs

Additional benefits of thermostats battery include:

  • improving housing microclimate;
  • ease of installation in existing thermostat or a new heating system;
  • device operation does not require extra cost;
  • ergonomic design of the thermostat is suitable for any interior space;
  • wide temperature range of operation of the thermostat (5-27 ° C);
  • the accuracy of a predetermined temperature of +/- 1 ° C;
  • uniform distribution of coolant throughout the heating system chain;
  • fuel economy in autonomous systems reaches 25%.

Buying and installing the thermostat batteries in private homes and cottages pays for one heating season

Setting the thermostat for radiators for heating homes is particularly relevant for areas with significant temperature variations: kitchen, living room and "sun" room.

Types of thermostats: the device and principle of operation

Consider the classification of thermostats battery of two main criteria:

  1. According to the principle of adjustment:
    • mechanical;
    • automatic.
  2. According to the type of the working substance of the thermostatic head:
    • gas-filled;
    • liquid.

mechanical thermostats

Mechanical thermostat for the battery consists of two main parts:

  • Thermostatic valve;
  • high sensitivity element (thermal head).

The mechanism works smoothly and reliably without the involvement of outside energy. The structure of the thermal head includes: controller, drive, and gas or fluid work item.

The principle of operation of the mechanical thermostat as follows:

  1. Under the influence of temperature changes in the volume of the coolant heating system.
  2. Bellows accepts the changes, and moves the control spool. Movement of the spool associated with any change in the room temperature.

A sensor element (liquid, gas) reacts to movement of the rod - like changing stroke allows to regulate and control the flow of coolant in the radiator.

Various factors may affect the operation of the thermostat:

  • drafts or ventilation of the room;
  • the temperature outside;
  • sunlight;
  • the presence near the thermostat other sources of heat or cold (refrigerator, heater, a hot water pipe).

electronic thermostats

Electronic thermostats - are programmable microprocessor devices for adjusting and maintaining the temperature of property regime. Temperature controller performs automatic control of the heating elements of the system (pump, boiler, mixer). The consumer enough to set the desired temperature, and a built-in sensor will regulate it for the entire heating season.

The main element of the electronic thermostat - sensor that sends information regarding the temperature indicators zone in which it is installed. Termorigulyator responds to information and optimizes the mode to the desired temperature.

Widespread digital thermostats with closed and open logic.

Electronic thermostats with closed logic have a constant, well-defined operation algorithm which does not depend on the environment. Can manage only the basic parameters. For household use this thermostat is enough.

Electronic thermostats open logic are freely programmable and able to adapt to any system in which it will be used. Increasingly, such devices are used in industrial applications as well as programming and changing settings is time consuming and must be carried out by specialists of high qualification.

In everyday life, not rarely used and the usual electronic thermostats, such mechanical counterparts, but with an electronic display. They operate in plain mode. For their work enough to set the temperature to be maintained at all times, or set the allowed range of temperature fluctuations.

Electronic thermostats are powered by batteries or supplied with the charging device.

Liquid and gas-filled thermostats

The gas or liquid (paraffin) typically serves as the working medium thermal head. I must say that the cheaper and more common - liquid thermostats. However, the gas-filled thermostats more accurately and quickly respond to the change in pressure inside the bellows.

Advantages of the design of gas-filled thermostat:

  • Gas condensation takes place in the cooled part of the device remote from the valve body, so the work of the thermostat does not depend on the water temperature (coolant);
  • the thermostat is very sensitive to temperature fluctuations facilities that can effectively control the heat input.

Install thermostats on radiators

Thermostat installation diagrams for one- and two-pipe heating system

When installing the thermostat to the battery in a one-pipe system, radiator connection have to change the scheme and an extra jumper - bypass.

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The bypass will connect the forward and backward liner coolant. This will allow the coolant to ply during battery overlap. Furthermore radiator dismantling be possible - just close the valves (3 and 4 in the figure).

The two-pipe heating system of the thermostat is set on the upper feed pipe and the valve mounted on the underside.

Explanation of code:

  • feed riser;
  • battery;
  • mechanical or electronic thermostat;
  • bottom valve;
  • vozduhootvodnik;
  • bypass (jumper);
  • reverse riser;
  • plug.

Rules competent installation

The thermostat will operate smoothly and efficiently, if the installation is made properly in compliance with all the rules:

  1. Install thermostats can be on aluminum, bimitalicheskie and steel radiators. Set the thermostat to iron battery is not desirable because of the high inertia of the alloy.
  2. The height of the thermostat placement - not less than 80 cm.
  3. Water from the heating system before installing the thermostat should be later.
  4. There must be sufficient space for easy configuration of the manual thermostat.
  5. Automatic thermostat should not be behind the blackout fabric drapery or decorative screen for the batteries - the unit will respond to the temperature inside the box, not in the room. This rule can be circumvented by setting the thermostatic element with remote sensor (away from the valve up sensor 2 - 8 meters). Alternatively, the thermostat can be placed on a horizontal section of the system, next to the insertion point in the radiator.
  6. In private homes thermostats installation should start from the upper floors in the apartment - a room with a significant temperature fluctuations (kitchen, living room).
  7. At the end of the heating season, the thermostat should be open, so as not to precipitate formed at the valve seat.

The sequence of mounting the thermostat on the battery

Consider a phased installation thermostat for heating the battery:

  1. Shut off the supply riser and drain the water from the heating system.
  2. A short distance from the radiator must be cut horizontal pipe liner.
  3. Cut the pipeline and the existing stop valves disconnected from the battery.
  4. When installing the thermostatic device in one-pipe heating system further jumper is welded between the tubes for supplying and discharging coolant.
  5. The valve thermostat and shut-off valve lift shafts and nuts, then they should be wrapped in a radiator cap.
  6. Assemble the piping and install it on the selected location.
  7. Installed piping to connect with horizontal feed pipes.

The diameter of the bypass must be one size smaller than the diameter of the feed pipes. For example, for a pipeline ¾ inch diameter locking portion must be ½ inch

Adjusting the thermostat

Mechanical thermostat must be configured after the installation - set the optimum temperature in the room. To this end, the following actions are performed:

  1. Minimize heat loss from the room: close windows, doors, vents, turn off the cooker hood.
  2. The thermometer placed in the room where the battery is installed.
  3. Rotate the thermostat head to the left as far as possible and fully open valve. In this position maximizes heat dissipation radiator.
  4. Once the room warmed by 5-6 degrees, to block flow of coolant, having turned the thermostat head to the right until it stops.
  5. The room temperature will gradually decrease, and when it reaches the optimum performance, it is necessary to open the valve very slowly.
  6. The valve opens so long until you hear the sound of water (the valve head at this time should be warmer).
  7. The valve should be left in position.

The electronic temperature control is enough to put on display the desired temperature. If functionality allows - you can select the temperature mode for daytime and night-time, for different days of the week, for example, the intense heating of the room during the weekend, and economical - on weekdays. This method is ideal for country houses and cottages, where the owners appear only on the weekend.

Tips for choosing the optimal thermostat

In order to buy a thermostat for heating the battery and eventually do not regret my purchase, you need to take a responsible approach to the choice of the thermostat and take into account some important points:

  1. Automatic temperature control more "manual" devices, but they do not require constant adjustment and are equipped with additional functions.
  2. Buying a thermostat is necessary to check that the size of the valve size of the pipeline. The valves are of two types: RTD-G and RTD-N.
    • RTD-G are used in one-pipe heating system of any room and two pipe heating systems of private houses without circulating pumps;
    • RTD-N is used in two-pipe heating systems of new buildings and houses with a circulating pump.
  3. Better to give preference thermostats reliable manufacturers whose products are proven in the market of heating devices. These companies include:
    • Liquid thermostats let Oventrop (Germany), and of Far Caleffi (Italy), "Teplokontrol" and "Danfoss" (Pocciya);
    • gas-filled thermostat - «Danfoss» (Pocciya).
  4. The thermostat must have a certificate and warranty from the manufacturer at least 3 years.

Particularly effective from an economic point of view, the use of thermostats batteries in private homes and cottages with autonomous heating in apartments with the same centralized supply of coolant, the use of thermostats can improve the indoor climate by establishing a more comfortable temperature.


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