Installing a thermostat on a radiator is an opportunity to reduce heating costs, improve the microclimate in the house, and also carefully use the earth's energy resources.
The motives may be different, but the decision is being implemented more and more often.
Many people, when choosing an equipment manufacturer, choose Danfoss.
And not surprisingly, the products of a famous brand can easily be found on the shelves of many stores.
The production technology of their thermostats based on a gas-filled bellows is patented and used in the company’s own factories. If you also decide to purchase a Danfoss thermostat, the installation and operating instructions will come in handy.
The purpose of installing a thermostat is to maintain the air temperature in the house selected by the consumer.
The design of a thermostat for radiators includes two elements that complement each other:
- Thermostat (or thermostatic element).
- Danfoss thermostat valve.
The valve is connected directly to the battery, and a thermostatic element is installed on it.
The heart of the matter is the thermostat. It is he who reacts to changes in ambient temperature and affects the valve that blocks the flow of coolant.
Danfoss thermostat
Inside the thermostat head is a bellows (a corrugated chamber capable of changing dimensions) filled with gas. The gas, depending on the temperature, changes its state of aggregation (when cooled, it condenses). This leads to a change in volume and pressure in the chamber. The chamber decreases in size and pulls the spool rod with it, which opens a larger gap in the valve for the flow of coolant.
When heated it occurs reverse process expansion and blocking of the lumen (the accepted standard is 2 V ° C in excess of the air temperature above the set one).
When a comfortable temperature is set on the regulator scale, a certain compression of the tuning spring is established inside, which is interconnected with a certain gas pressure.
Danfoss produces bellows with gas inside, as well as liquid ones. The latter are more inert and react more slowly to temperature changes.
Types and symbols:
- RTS - liquid bellows;
- RTD-G - gas bellows for a one-pipe system, or two-pipe without a pump;
- RTD-N - gas bellows for two-pipe system, and systems with a circulation pump.
Radiator thermostat DANFOSS RA 2991
There are also modifications of thermoelements in which:
- Protection is provided against reconfiguration by random persons ( great option for public institutions and children's rooms).
- There is an external temperature sensor connected by a two-meter capillary tube, which can be installed away from the radiator, buried in a niche or crowded with furniture, which gives a more accurate measurement result.
- With a temperature range slightly smaller than conventional sensors for integration into a system where payment is made according to regulations.
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Floor heating system
Thermostats are also used for underfloor heating systems. A thermostat for heated floors is a must!
After all, when driving liquid into the floor contour, you need to lower its temperature from 60 - 90 V ° C to a comfortable 35 - 40 V ° C (in this case, the surface of the floor itself will be about 25 V ° C).
Flow meters are powerless if the pressure in the system fluctuates, if the air is heated, for example, from the sun, and even if residents want to save on heating while they are away.
The thermomechanical regulator is best used for small rooms, about 10 m2.
For large areas use room thermostats with floor heating temperature sensors.
Installation of the thermostatic element
First of all, the valve is mounted on the radiator. To do this, the coolant supply is shut off.
- Markings are made on the supply pipe. The area that will need to be cut should be the same length as the valve body minus the threaded connections.
- The heating pipe is cut and the extra section is cut out.
- Using a leech, or die, on outside The cut pipe is threaded.
- The connection is treated with plumbing paste and fum tape.
- The valve body is screwed onto the resulting thread.
- Since the pipe cannot be twisted, an American union nut is twisted on the opposite side of the valve, and then screwed (with a hex wrench) into the radiator hose.
- The body of the device is screwed into its own union nut through a rubber washer. This connection does not need to be sealed in any way, the main thing is that it is clean.
- After the valve is installed on the radiator, the protective cap is removed from it (located perpendicular to the pipe).
The thermal head is set to the maximum temperature value, after which it is pressed onto the valve (until it clicks).
Sensor installation
As already mentioned, a remote sensor is needed if the battery is built into the wall or covered by something (furniture, screen, thick curtains).
A sensor and a setting unit are combined in one housing of this element.
- It is best to place the device on an open (but without drafts) section of the wall, at a height of about 1.4 m from the floor. You need to avoid places near appliances that can greatly change the temperature of the environment - air conditioners, stoves, etc.
- The device comes with a small mounting panel, which is secured to the selected location using a pair of self-tapping screws.
- Inside the sensor is wound capillary tube. It is pulled out to the required length so that the device reaches the fixed bar.
- The capillary tube is carefully fixed on the back of the valve.
- The sensor is placed on the bar by simply snapping it into place.
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Setting a limit
The operation of thermostats is based on physical laws. Therefore, you need to remember that the conditions in which the device is located may make some adjustments (for example, distance from the heat source). There are indicative tables of correspondence between the regulator scale and temperature, which can be taken as a guide during installation. However, after the basic setup, you will need to “understand” your thermostat.
To do this:
- Set the temperature on the handle with marks.
- After an hour, control measurements are taken with a room thermometer at several points in the room.
- If the temperature is higher or lower, the readings on the handle are adjusted.
Proportional band - 2 °C. If you set the temperature to 20°, the device will maintain readings in the range from 20 to 22 °C.
Sensor after installation on the radiator
The two pins that are included with the sensor will help set the limits for the minimum and maximum positions of the thermoelement.
They are located at the bottom of the device:
- To set the limit at a mark, for example “3”, you need to pull out the limiter and set the sensor readings at the mark “3”. Then the pin is inserted into the hole, which in this position is under the diamond icon.
- The second limiting threshold is set in the same way. The handle is turned to the desired value, only the pin is inserted into the hole located under the triangle icon.
To do this:
- Both pins are removed.
- The handle is placed at the desired level.
- In this position, the first pin is inserted into the hole located under the diamond.
- The second pin goes into the hole under the triangle.
Danfoss thermostats have many positive feedback. This is a very easy to use device that does not require any attention after initial installation and configuration. But the result will be a more comfortable temperature in the apartment, and also in some cases, significant savings budget funds.
Video on the topic
The main task of any heating system is to provide a comfortable air temperature in the room. This temperature may vary depending on the purpose of the room, but if a prerequisite is its constant throughout the day, then the thermostat becomes indispensable structural element heating device.
The Danfoss radiator thermostat consists of two parts: a valve and a thermostatic element (thermal head). Inside the thermostatic element there is a thin sealed cylinder - a bellows, filled with a liquid or gaseous heat-sensitive working substance. As the temperature rises, the bellows stretches and moves the rod associated with it, which presses on the rod in the valve, and the valve reduces the flow of coolant into the radiator. As the temperature decreases, the process progresses reverse order. Thus, the thermal head is the control mechanism, and the valve is the actuator.
Manufacturer: Danfoss (Denmark).
Danfoss radiator thermostat valves
Radiator thermostat valves are divided into:
- valves for a two-pipe pump heating system (type RA-N) of increased resistance with an installation device for adjusting their throughput to perform hydraulic balancing of the pipeline system;
- high-capacity valves type RA-G for pump single-pipe or two-pipe gravity heating systems.
Danfoss valve bodies are made of brass. The connection allows for simple and precise mounting of the thermostatic element on the control valve. To identify the RA-N valves, their protective caps are painted red, and RA-G valves are painted grey.
Danfoss RA-G thermostat valves
| RA-G 15 | Valve thermostat RA-G 15 for a one-pipe or two-pipe system, by type of connection - straight or angular, connecting size - 1/2 inch (DN 15). | RUB 1,930 |
| RA-G 20 | Thermoregulator valve RA-G 20 for a one-pipe or two-pipe system, by connection type - straight or angular, connecting size - 3/4 inch (DN 20). | RUB 2,460 |
| RA-G 25 | Thermoregulator valve RA-G 25 for a one-pipe or two-pipe system, by type of connection - straight or angular, connecting size - 1 inch (DN 25). | 3,100 rub. |
Danfoss RA-N thermostat valves
| RA-N 15 | Thermostat valve RA-N 15 for a two-pipe system, connection type - straight or angular, connection size - 1/2 inch (DN 15). | 1,600 rub. |
| RA-N 20 | Thermostat valve RA-N 20 for a two-pipe system, connection type - straight or angular, connection size - 3/4 inch (DN 20). | 2,000 rub. |
| RA-N 25 | Thermostat valve RA-N 25 for a two-pipe system, connection type - straight or angular, connection size - 1 inch (DN 25). | 3,600 rub. |
The RA series can be combined with valves from the RA-G and RA-N series.
Thermostatic element and radiator valve
The Danfoss thermostatic equipment set consists of a radiator valve RA-G (for a single-pipe or two-pipe heating system) or RA-N (for a two-pipe heating system) and a thermostatic element RA.
The kit is designed to automatically regulate the air temperature in the room.
Easy to install on various types heating devices in apartments with a centralized one-pipe and two-pipe heating system.
| RA 2994/RA-G 15 straight Article 013G2164B Direct thermostat valve RA-G 15 for one-pipe or two-pipe systems, thermostat RA 2994. | RUB 2,990 |
| RA 2994/RA-G 15 corner Article 013G2163B Angle valve thermostat RA-G 15 for one-pipe or two-pipe systems, thermostat RA 2994. | RUB 2,990 |
| RA 2940/RA-G 15 straight Article 013G2144 Direct thermostat valve RA-G 15 for one-pipe or two-pipe systems, thermostat RA 2940. | 3,200 rub. |
| RA 2940/RA-G 15 angled Article 013G2143 Angle valve thermostat RA-G 15 for one-pipe or two-pipe systems, thermostat RA 2940. | 3,200 rub. |
| RA 2994/RA-G 20 straight Article 013G2166B Direct thermostat valve RA-G 20 for one-pipe or two-pipe systems, thermostat RA 2994. | RUB 3,390 |
| RA 2994/RA-G 20 corner Article 013G2165B Angle valve thermostat RA-G 20 for one-pipe or two-pipe systems, thermostat RA 2994. | RUB 3,390 |
| RA 2940/RA-G 20 straight Article 013G2146 Direct thermostat valve RA-G 20 for one-pipe or two-pipe systems, thermostat RA 2940. | RUB 3,690 |
| RA 2940/RA-G 20 angled Article 013G2145 Angle valve thermostat RA-G 20 for one-pipe or two-pipe systems, thermostat RA 2940. | RUB 3,690 |
| RA 2940/RA-N 15 straight Article 013G2154 Direct thermostat valve RA-N 15 for two-pipe system, thermostat RA 2940. | 2,900 rub. |
| RA 2940/RA-N 15 corner Article 013G2153 Angle valve thermostat RA-N 15 for two-pipe system, thermostat RA 2940. | 2,900 rub. |
| RA 2940/RA-N 20 straight Article 013G2156 Direct thermostat valve RA-N 20 for two-pipe system, thermostat RA 2940. | RUB 3,290 |
| RA 2940/RA-N 20 corner Article 013G2155 Angle valve thermostat RA-N 20 for two-pipe system, thermostat RA 2940. | RUB 3,290 |
Danfoss thermostatic elements
Danfoss thermostatic elements (thermal heads) are automatic temperature control devices designed to complete radiator thermostats.
The thermostat, equipped with a thermostatic element, maintains a constant temperature in the room at the desired level within the range from +5°C to +26°C with an accuracy of ±1°C.
It should be remembered that most thermostats are regulating fittings, but not shut-off(except for thermostats RA2940 and RAW 5110), therefore, if it is necessary to dismantle the radiator, the thermal head should be replaced with a bronze locking handle, which will ensure complete shutoff of the coolant flow.
Danfoss thermostatic elements
 | RA 2994 | Thermostatic element with gas-filled temperature sensor. Temperature adjustment range: from +5°C to +26°C. | RUB 1,440 |
 | RA 2992 | Thermostatic element with gas-filled remote temperature sensor. Temperature adjustment range: from +5°C to +26°C. Capillary tube length: 2 m. | 2,200 rub. |
 | RA 2920 | Thermostatic element with gas-filled temperature sensor and tamper-proof protection. Temperature adjustment range: from +5°C to +26°C. | RUB 2,190 |
 | RA 2940 | Thermostatic element with gas-filled temperature sensor. Temperature adjustment range: from +0°C to +26°C. Possibility of shutting off the coolant supply. | 1,600 rub. |
 | RAW 5010 | Thermostatic element with liquid temperature sensor. Temperature adjustment range: from +8°C to +28°C. | RUB 1,390 |
 | RAW-K | Thermostatic element with liquid temperature sensor. Temperature adjustment range: from +8°C to +28°C. For installation on built-in valves (M30x1.5) of radiators with bottom connections - Rifar, Copa, Kermi, Demrad, Stelrad, Purmo, Korado. | RUB 1,390 |
 | Thermostatic element remote control with liquid temperature sensor. Temperature adjustment range: from +8°C to +28°C. Capillary tube length: 2 m (RA 5062), 5 m (RA 5065). | RUB 4,590 RUB 4,960 |
When installing thermostats, you should remember that the effect of their use will be noticeable if they control radiators with low thermal inertia. Practically, these are all known types modern radiators except cast iron. The latter, due to the large mass of cast iron and water, will heat up and cool down very slowly, negating the effect of regulation.
Shut-off and connection valves RLV are designed for lateral connection of pipelines of a two-pipe heating system to the radiator. Available in straight and angular versions.
P y =10 bar*; T max =120°C; ΔР max =0.6 bar.
* Conditional pressure. See GOST 356-80 Fittings and pipeline parts. Conditional, test and working pressures.
Advantages of our products
Save up to 46% energy
Radiator thermostats allow you to spend exactly the amount of energy that is needed at the moment to maintain a comfortable temperature in the room. Different thermostatic elements cope with this task in different ways. Compared to a manual control valve, liquid- or paraffin-filled thermostats save 31%, and gas-filled thermostats save 36%. Using Danfoss living eco electronic radiator thermostats allows you to save up to 46% of heating energy.
*According to a study conducted by the Rhine-Westphalian University of Technology,
Aachen, Germany.
Fast response
Danfoss RA series thermostats are equipped with a gas-filled bellows. The heat capacity of gas is significantly less than that of liquid and, especially, paraffin. As a result, gas-filled thermostats respond much faster to changes in room temperature. That's why Danfoss thermostats maintain temperature more accurately and provide greater energy savings. Radiator thermostats with a gas-filled thermostatic element (“gas”) are patented and manufactured only by Danfoss.
Easy installation and setup
The adapter set will allow you to install the Danfoss living eco thermostat on most thermostatic valves on the market. See for yourself by watching this short video.
Reliable performance
Danfoss thermostats are fully adapted for operation in Russian conditions. More than 40 years of experience in operating thermostats in Russia allows us to confirm this. For the first time in Moscow, Danfoss thermostats were installed in 1964 at the Rossiya Hotel, where they served until its demolition
Safety of thermal heads for heating radiators
Thermal heads for Danfoss living eco heating radiators have a child lock function. Exploring the world around us will be safe even for the little ones.
Comfort in all rooms
The amount of heat each room needs varies throughout the day. In the morning the sun shines through the windows on the east side of the house, at noon on the south, and in the evening on the west. If you control the heating of the entire house based on the temperature in one room, the temperature in the remaining rooms will change throughout the day.
Now you can buy a thermostat with a modern design
Red Dot is a world-famous “quality mark” in the field of industrial design. Only products that are exceptional in terms of aesthetics and functionality are awarded this high rating. In 2010, Danfoss was awarded the Red Dot award for the development of its living thermostats.
Promarmatura XXI Century LLC offers the widest range of Danfoss products
The range of products includes: | | | | | | |
Danfoss is the world's largest manufacturer of radiator thermostats. Over the years, Danfoss has sold more than 300 million radiator thermostats worldwide, saving a million liters of fuel every day and preventing tons of environmental damage carbon dioxide, sulfur compounds and other harmful substances. Radiator thermostats pay for themselves in less than two years, and their standard service life of more than 20 years is an excellent opportunity to save money and energy.
Danfoss radiator thermostats are manufactured with built-in and remote sensors to ensure optimal operation; plus a wide range of valves and additional equipment make up the widest range of our products.
Thermostatic elements RA 2000 series
Thermostatic elements of the RA 2000 series are automatic temperature control devices designed to complete radiator thermostats of the RA type. The radiator thermostat is a direct-acting proportional air temperature controller with a small proportional band, which is currently equipped in building heating systems for various purposes. The RA thermostat consists of two parts:
All thermostatic elements can be combined with any RA type control valves. The clip connection allows for simple and precise attachment of the thermocouple to the valve. The protective casing of thermoelements RA 2920 and RA 2922 prevents their unauthorized dismantling and reconfiguration by unauthorized persons. Technical characteristics of RA type radiator thermostats comply with European standards EN 215–1 and Russian GOST 30815–2002.
Technical characteristics of thermostatic elements of the RA 2000 series
The main device of the thermostatic element is a bellows, which provides proportional control. The thermocouple sensor senses changes in ambient temperature. The bellows and sensor are filled with an easily evaporating liquid and its vapor. The adjusted pressure in the bellows corresponds to its charging temperature. This pressure is balanced by the compression force of the tuning spring. As the air temperature around the sensor increases, some of the liquid evaporates and the vapor pressure in the bellows increases. At the same time, the bellows increases in volume, moving the valve spool towards closing the hole for the flow of coolant into heating device until equilibrium is achieved between the spring force and the vapor pressure. As the air temperature decreases, the vapors condense and the pressure in the bellows drops, which leads to a decrease in its volume and movement of the valve spool towards the opening to a position at which equilibrium of the system is again established. The vapor fill will always condense in the coldest part of the sensor, usually furthest from the valve body. Therefore, the radiator thermostat will always respond to changes room temperature without feeling the temperature of the coolant in the supply pipeline. However, when the air around the valve is heated by the heat given off by the piping, the sensor may register more high temperature than indoors. Therefore, to eliminate such influence, it is recommended to install thermostatic elements, usually in a horizontal position. Otherwise, it is necessary to use thermocouples with a remote sensor.
Selecting the thermostatic element type
Thermostatic elements with built-in sensor
When choosing a thermostatic element, you should be guided by the rule: the sensor must always respond to the air temperature in the room.
Thermostatic elements with integrated sensor must always be positioned horizontally so that ambient air can circulate freely around the sensor. They should not be installed in a vertical position, since the thermal effect on the sensor from the valve body and heating system pipe will lead to improper functioning of the thermostat.
Thermostatic elements with remote sensor
Thermostatic elements with a remote sensor should be used if: o the thermoelements are covered with a blank curtain; o the heat flow from the heating system pipelines affects the built-in temperature sensor; o the thermoelement is located in the draft zone; o Vertical installation of the thermoelement is required. The remote sensor of the thermostatic element must be installed on a wall free of furniture and curtains or on a baseboard under the heating device if there are no heating system pipelines there. When installing the sensor, the capillary tube should be pulled out to the required length (maximum 2 m) and secured to the wall using the supplied brackets or a special gun.
RAW series thermostatic elements
Thermostatic elements of the RAW series are automatic temperature control devices designed to complete radiator thermostats of the RA type. The radiator thermostat is a direct-acting proportional air temperature controller with a small proportional band, which is currently equipped in heating systems of buildings for various purposes. The thermostat type RA consists of two parts: a universal thermostatic element of the RAW series and a control valve with pre-set capacity RA-N (for two-pipe heating systems) or RA-G (for a single-pipe system).
The production program for thermostatic elements of the RAW series includes:
Thermostatic elements of the RAW series are equipped with devices for protecting the system from freezing, fixing and limiting the temperature setting. The RAW 5012 is equipped with an ultra-thin 2 m long capillary tube, which is wound inside the sensor housing and connects the remote sensor to the thermostatic element. During installation, the pipe is pulled to the required length. The clip connection allows for simple and precise attachment of the thermocouple to the valve.
Technical characteristics of radiator thermostats with RAW series thermoelements comply with European standards EN 215-1 and Russian GOST 30815-2002.
To prevent unauthorized dismantling, the thermoelement can be fixed to the valve using a special lock (see Accessories).
Technical characteristics of RAW series thermostatic elements
The main device of the thermostatic element is a bellows, which provides proportional control. The thermocouple sensor senses changes in ambient temperature. The bellows and sensor are filled with a special heat-sensitive liquid. The adjusted pressure in the bellows corresponds to its charging temperature. This pressure is balanced by the compression force of the tuning spring. As the air temperature around the sensor increases, the liquid expands and the pressure in the bellows increases. At the same time, the bellows increases in volume, moving the valve spool towards closing the hole for the flow of coolant into the heating device until a balance is reached between the spring force and the liquid pressure. As the air temperature drops, the liquid begins to compress and the pressure in the bellows drops, which leads to a decrease in its volume and movement of the valve spool towards the opening to a position at which equilibrium of the system is again established. To eliminate the influence warm air It is recommended to install thermostatic elements from the heating pipe of the heating device, usually in a horizontal position. Otherwise, it is necessary to use thermocouples with a remote sensor.
Thermostatic elements of the RAW-K series
Thermostatic elements of the RAW-K series are automatic temperature controllers with a small proportional band. RAW-K are designed for installation on thermostat valves from Heimeier, Oventrop or MNG, built into a steel structure panel radiators type Biasi, Delta, DiaNorm, Diatherm, Ferroli, Henrad, Kaimann, Kermi, Korado, Purmo, Radson, Superia, Stelrad, Veha, Zehnder-Completto Fix. The thermostatic element of the RAW-K series has a liquid sensor with a temperature setting range of 8-28 ° C and is equipped with a device for protecting the heating system from freezing.
The Danfoss company produces 3 modifications of RAW-K series thermoelements:
The RAW-K 5032 is equipped with an ultra-thin 2 m long capillary tube, which is wound inside the remote sensor housing, connecting it to the working bellows of the thermostatic element. During installation, the tube is pulled to the required length. Thermostatic elements of the RAW-K series comply with European standards EN 215-1 and Russian GOST 30815-2002.
Electronic radiator thermostat Living eco
Electronic radiator thermostat Living eco® is a programmable microprocessor controller for maintaining a given air temperature, mainly in residential buildings served by a water heating system. The thermostat is designed for installation on the valves of radiator thermostats instead of traditional thermostatic elements.
Living eco® has programs P0, P1 and P2, which allow you to regulate the room temperature at different times of the day.
The P0 program maintains a constant air temperature throughout the day. Programs P1 and P2, in order to save energy, can reduce the temperature in the room at certain periods of time, which allows you to adapt the operation of the heating system to the lifestyle of the people living in it.
The Living eco® thermostat is supplied complete with adapters for installation on the valves of Danfoss thermostats, as well as most other manufacturers. Installing and configuring the Living eco® thermostat is easy; there are only three buttons on the panel.
The Living eco® thermostat is equipped with an open window function, which turns off the coolant supply to the heating device when the room temperature drops sharply, which reduces heat loss and thereby increases the efficiency of the heating system.
Main characteristics of the thermostat:
Pre-installed programs
The "long absence" function allows you to reduce the temperature in the room when it is not in use. The period of absence and temperature are customizable by the consumer.
The selection of programs and their settings are made in accordance with the instructions supplied with the thermoelement.
TWA series thermoelectric actuators
Thermoelectric mini-actuators of the TWA series are designed for on-off control of various control valves in heating and heating and cooling systems of local ventilation units.
The actuator is equipped with a visual travel indicator that shows whether the valve is in closed or open position.
TWA actuators, depending on the modification, can be used with valves of the RA, RAV8 and VMT series manufactured by Danfoss, as well as with valves from Heimeier, MNG and Oventrop, which have a thread for mounting the actuator M 30 x 1.5. If the actuator is used with other types of valves, the valve must be checked to ensure compatible geometry and proper closure. The supply voltage of the electric drive is 24 or 230 V. The valves can be normally closed in the absence of voltage (NC) and normally open (NO). In addition, the normally closed actuator with 24 V supply voltage is supplied with a limit switch (NC/S).
Thermostat valves with pre-setting RA-N and RA-NCX DN = 15 mm (chrome plated)
Control valves RA-N and RA-NCX are intended for use in two-pipe pumping systems water heating.
RA-N is equipped with a built-in device for pre-setting its throughput within the following ranges:
Valves RA-N and RA-NCX can be combined with all thermostatic elements of the RA, RAW and RAX series, as well as with the TWA-A thermoelectric actuator.
To identify the RA-N and RA-NCX valves, their protective caps are painted red. The protective cap must not be used to block the flow of coolant through the heating appliance. Therefore, the handle (code no. 013G3300) must be used.
Valve bodies are made of pure brass, nickel plated (RA-N) or chrome plated (RA-NCX).
The technical characteristics of the RA-N and RA-NCX valves in combination with thermostatic elements of the RA, RAW and RAX series comply with the European standards EN 215-1 and the Russian GOST 30815-2002, and the connecting thread size complies with the HD 1215 standard (BS 6284 1984). All radiator thermostats manufactured by Danfoss are manufactured in factories certified to ISO 9000 (BS 5750).
To prevent deposits and corrosion, the valves of the RA-N and RA-NCX thermostats should be used in water heating systems where the coolant meets the requirements of the Rules technical operation power stations and networks Russian Federation. In other cases, you must contact Danfoss. It is not recommended to use compositions containing petroleum products (mineral oils) to lubricate valve parts.
Adjustment to the calculated value is carried out easily and accurately without the use of special tools. To do this, perform the following operations:
Pre-setting can be made in the range from "1" to "7" at intervals of 0.5. In position "N" the valve is fully open. Installation on the dark area of the scale should be avoided.
When the thermostatic element is installed, the pre-setting is hidden and thus protected from unauthorized changes.
Thermostat valve with presetting RA-N with press fitting
The RA-N valve is intended for use in two-pipe water heating pump systems with copper or stainless steel. Special crimping tools are required to connect the valve fitting to the pipeline. Valve body appearance and technical characteristics are identical to standard valves RA-N DN = 15 mm. The RA-N can be used with all types of thermostatic elements from the RA or RAW series, as well as with specially designed thermostatic elements such as RAX and the TWA-A thermoelectric actuator.
The RA-N control valve is equipped with a built-in device for pre-setting (installation) its flow capacity Kv in the range from 0.04 to 0.73 m3/h.
To identify the valves, the protective cap is painted red. The cap should not be used to block the regulated medium. For these purposes, a special metal handle (code number 013G3300) should be used. The valve body is made of nickel-plated DZR brass and the pressure pin is made of stainless steel. The pin does not require lubrication during the entire life of the valve. The gland seal can be replaced without draining the piping system. RA-N should be used in water heating systems where the coolant meets the requirements of the Rules for the technical operation of power plants and networks of the Russian Federation. In other cases, you must contact Danfoss. It is not recommended to use compositions containing petroleum products (mineral oils) to lubricate valve parts.
High capacity thermostat valve RA-G
The thermostatic valve with increased flow rate RA-G is intended for use, as a rule, in single-pipe water heating systems with pump circulation of coolant that meets the requirements of the Rules for the technical operation of power plants and heating networks of the Russian Federation. The valve is not recommended to be used if the coolant contains mineral oil impurities.
The RA-G is equipped with a seal that can be replaced without draining the heating system. The pressure pin in the stuffing box is made of chrome-plated steel and does not require lubrication throughout the life of the valve. All versions of RA-G valves can be combined with any thermostatic elements of the RA series.
RA-G valves are supplied with gray (to identify them) protective caps, which should not be used to block the flow of coolant. Therefore, a special metal service locking handle (code no. 013G3300) must be used.
Set of thermostatic fittings X-traTM for heated towel rails and design radiators.
The X-tra™ thermostatic kit is specially designed for heated towel rails. It consists of a thermostat valve, a thermostatic element and shut-off valve with drainage function. The innovative self-sealing connection of the valves to the radiator is made using one-half inch threads. The valves and thermoelement are available in white, chrome and steel, suitable for most heated towel rails. This set is the perfect complement to a heated towel rail. The attractive and compact design allows you to install the thermostat under the heated towel rail parallel to the wall, eliminating accidental impacts on it.
The range includes two types of thermostats with different control principles:
- RAX, which regulates the room temperature;
- RTX, which detects and regulates the water temperature leaving the heated towel rail. Used on heated towel rails and adjustable 5-10°C above room temperature, the RTX thermostat provides a constant temperature for drying towels.
The valve assembly is a body with a double-sided self-sealing fitting, which has two sealing rings: one to seal the connection between the fitting and the heated towel rail, and the second to seal the connection between the fitting and the valve body. The Allen screw serves to provide a seal between the valve body and the fitting. If the O-rings do not fit into the fittings of the heated towel rail, a traditional sealing material is used.
A popular brand under which thermostats are produced is Danfoss. Products from this company can be found in almost all stores.
Find out the price and buy heating equipment and related products you can find here. Write, call and come to one of the stores in your city. Delivery throughout the Russian Federation and CIS countries.
The production technology based on a gas-filled bellows has a patent and is used at the company’s own factories. If you are inclined to buy a Danfoss thermostat, be sure to read the operating instructions.
About Danfoss regulators
Why install a thermostat? To maintain a certain indoor air temperature.
The product consists of two parts that complement each other:
- Thermostat.
- Thermostatic valve.
The Danfoss thermostat valve is connected directly to the radiator, and a thermostat is already mounted on it.
The main thing is a thermostatic element that senses temperature changes and sends a signal to a valve that shuts off the flow of coolant.
Inside the thermal head is a bellows (a corrugated chamber that can change sizes) with gas. At a certain temperature, a gas changes its state (it condenses when cooled). This affects the change in volume and pressure in the chamber, which becomes smaller in size and pulls the spool rod, which in turn opens a gap in the valve for the circulation of the coolant.
When heating occurs, the reverse expansion process starts and the lumen is closed (the standard is considered to be 2 V °C of temperature exceeding the specified one).
When the optimal degree is set on the instrument scale, a certain compression of the tuning spring appears inside, which is associated with a specific gas pressure.
Danfoss produces gas and liquid bellows (more inert, slower to react to temperature fluctuations).
Types and symbols
The abbreviations by which Danfoss heating thermostats are distinguished indicate the type of filler and the purpose of the device:
- RTS is a liquid bellows;
- RTD-G – gas-powered, suitable for one- and two-pipe systems without a pump;
- RTD-N – gas appliance for one- and two-pipe pump systems.
Danfoss RTR/RTD thermostatic service element with built-in temperature sensor
There are modifications that perform not only their main functions, but also many additional ones. Let's say there is an option to protect against reconfiguration of set indicators. This is convenient when children are constantly in the room. The number of modes and variety of functions in each model is individual.
Popular models of Danfoss thermostats
The company's product range includes many different Danfoss thermostats for batteries. The following are popular:
- RTD regulator marked 3640. It is used on 2-pipe heating systems classic type. Equipped with an option that prevents the line from freezing in cool weather. The Danfoss RTD thermostat is used in household and industrial conditions, has four divisions with marks in the form of Roman numerals.
- The designation RAX, as a rule, is for products with liquid that are used for installation on unusual batteries or on heated towel rails. Externally they are very attractive and fit well into the design. The case has only divisions with Roman and Arabic numerals.
- The Danfoss RA-299 thermostat operates on gas, has automatic temperature control, and is produced in different colors. Reacts quickly to temperature fluctuations. Only used for installation on classical systems heating.
- Device Living ECO has the option of controlling the microclimate in the room. It can be safely installed in various administrative buildings And residential buildings. The product is distinguished by the presence of an LCD screen, which displays all the necessary data about the thermal fluid. In addition, the case has main buttons for mode settings.
- There are also series with many functions; they are suitable for heated towel rails and for different areas of heating equipment. Can be right- or left-handed.
Danfoss Living Connect thermostat
All Danfoss thermostats for heating radiators are supplied with parts that simplify the installation of the device and its future use.
Installation of Danfoss thermal head
The device is mounted precisely on the pipe of the hot water supply circuit. Installation does not involve anything complicated, even in the case of design options, installation follows the same principle. The work is carried out in stages:
- Markings are made on the supply pipe to indicate the area that needs to be cut. It is worth considering the dimensions of the valve body. The threaded element is removed, which will fit directly into the pipe.
- The heating is turned off and the liquid is drained to prevent a flood in the house.
- The excess section of the pipe is cut off according to the marks, and a thread is made with a die on the outer part of the cut.
- The joint is treated with a special paste for plumbing work(manufacturer is not important).
- The valve is screwed onto the thread made with a die and tightened tightly with a washer. There is no need to further secure the connection for tightness. The actions performed are sufficient for a reliable connection.
- The fuse is removed, the maximum value of “five” is set on the regulator, and a housing with a scale is put on top.
- All joints are checked and the heating device is connected to the entire heating system.
If the Danfoss thermostat was connected correctly, then there should be no problems. It is worth checking the operation of the device before opening and closing the valve for the first time.
Setting up the thermostat
All the manufacturer’s devices differ in appearance and technical characteristics, but they are still configured in the same way. To implement it, you need to look at the operating instructions and familiarize yourself with the designation of the modes that are indicated on the device body. Indicators may vary, it all depends on the model.
Next, to adjust the Danfoss thermostat, set it to the required temperature. This can be done by moving the torque element in a certain direction. If you have installed a device with buttons, all you need to do is press the plus or minus.
It is possible to specify intermediate values when they in the best possible way suitable for creating a specific temperature regime indoors. A couple of minutes will pass and heating system will have time to adapt to the specified parameters and will heat until the optimal microclimate is achieved. The same applies to refrigeration equipment.
Operation of the regulator in a heated floor system
Danfoss floor heating thermostat – important thing for the entire heating system. The device has the responsible function of adjusting the temperature to a comfortable 25 °C.
Flow meters will not help if the pressure is unstable, the air heats up, for example, sun rays, and residents strive to save on heating while they are not at home.
Experts advise installing a mechanical regulator in small rooms of approximately 10 m².
IN large rooms Danfoss room thermostats are used with temperature sensors warm floor.
The Danfoss thermostatic head deservedly has many positive reviews. This is an easy-to-use item that does not require special attention from the owner after installation and adjustment. As a result, a favorable microclimate is provided in the house, and in some cases, significant savings in money.
