Danfoss heating radiator regulator manual. How to choose a Danfoss thermostat and install it
Installing a thermostat on a radiator is an opportunity to reduce heating costs, improve the microclimate in the house, as well as the careful use of earth's energy resources.
The motives may be different, but the solution is being implemented more and more often.
Many, choosing an equipment manufacturer, stop at Danfoss.
And not surprisingly, the products famous brand easy to find on the shelves of many stores.
The technology for the production of their thermostats based on gas-filled bellows is patented and is 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 temperature of the air in the house chosen by the consumer.
The design of the thermostat for radiators includes two elements that complement each other:
- Thermostat (or thermostatic element).
- Danfoss thermostatic valve.
The valve is connected directly to the battery, and a thermostatic element is installed on it.
The basis of the basics is the thermostat. It is he who reacts to changes in ambient temperature and affects the valve that blocks the flow of coolant.
Thermostat Danfoss
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 (it condenses when cooled). This leads to a change in volume and pressure in the chamber. The chamber decreases in size, pulls the spool rod behind it, which opens a larger clearance in the valve for the coolant to enter.
When heated, the reverse process of expansion and overlapping of the lumen occurs (the accepted standard is 2 V ° C 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 set inside, which is interconnected with a certain gas pressure.
Danfoss manufactures gas-filled bellows as well as liquid-filled bellows. The latter are more inert, reacting to temperature changes more slowly.
Types and symbols:
- RTS - liquid bellows;
- RTD-G - gas bellows for one-pipe system, or two-pipe without pump;
- RTD-N - gas bellows for two-pipe systems, and systems with circulation pump.
Radiator thermostat DANFOSS RA 2991
There are also modifications of thermoelements, in which:
- Protection against reconfiguration by random persons is provided ( great option for public institutions and children's rooms).
- There is a remote temperature sensor connected by a two-meter capillary tube, which can be installed away from the radiator, buried in a niche or stuffed with furniture, which gives a more accurate measurement result.
- With a temperature range slightly less than conventional sensors for integration into a system where billing is done.
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Floor heating system
Thermostats are also used for floor heating systems. A thermostat for underfloor heating is a must!
After all, driving liquid into the floor circuit, 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 jumps, if the air is heated, for example, from the sun, and even if the tenants want to save on heating during their absence.
The thermomechanical regulator is best used for small rooms, about 10 m2.
For large areas, room thermostats with underfloor heating temperature sensors are used.
Mounting the thermostatic element
First of all, the valve is mounted on the radiator. To do this, the coolant supply is shut off.
- Marking is done on the supply pipe. The section to be cut must be the same length as the valve body minus the threaded connections.
- The heating pipe is cut, an extra piece is cut out.
- With the help of a lerka, or a die, on outside cut pipe is carved.
- The connection is processed with sanitary 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 drive.
- The body of the device is screwed into its own union nut through a rubber washer. This connection does not need to be sealed somehow, the main thing is that it be clean.
- After the valve is installed on the radiator, the protective cap is removed from it (located perpendicular to the pipe).
The maximum temperature value is set on the thermal head, after which it is put on the valve with pressure (until it clicks).
Mounting the sensor
As already mentioned, a remote sensor is needed if the battery is built into the wall or is closed by something (furniture, screen, blackout curtains).
In one case of this element, a sensor and a tuning unit are combined.
- 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 plate, which is fixed to the selected location with a pair of self-tapping screws.
- A capillary tube is wound inside the sensor. It is pulled to the desired 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 a simple snap.
The microclimate in the house and air humidity are two inextricably linked concepts. for home and health, read about it in the article.
Which insulation for underfloor heating to choose, read. And also you will find general information about the installation of heaters.
Setting a limit
Thermostats are based on physical laws. Therefore, you need to remember that the conditions in which the device is located can make some adjustments (for example, the 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.
For this:
- Set the temperature on the handle with marks.
- An hour later, control measurements are carried out 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 °, then the device will keep the 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 position of the thermocouple.
They are located at the bottom of the device:
- To set a 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 turns to the desired indicator, only the pin is inserted into the hole under the triangle icon.
For this:
- Both pins are removed.
- The handle is placed on the desired indicator.
- In this position, the first pin is inserted into the hole located under the diamond.
- The second pin is in the hole under the triangle.
Danfoss thermostats have many positive reviews. This is a very easy to use device that does not require any attention after the initial installation and configuration. But the result will be a more comfortable temperature in the apartment, as well as in some cases, significant savings in budget funds.
Related video
During heating season bills for public Utilities housing grows and gets stronger, and the microclimate in the apartment does not get better due to the inability to reduce the heating temperature of the radiator. There is a compact device that solves both problems: saves money spent on heating your home, and helps maintain an optimal indoor climate.
Danfoss, as the world's largest manufacturer of radiator thermostats, is confidently addressing the issue of household energy saving.
The Danfoss Radiator Thermostat is a simple yet effective solution for saving energy in your home. This makes the product relevant to the market of millions of private consumers seeking to minimize the cost of water heating.
With the Danfoss thermostat you can set desired temperature in any room. The device is suitable for all types of radiators (except cast iron).
Danfoss
Danfoss is a leading technology provider that meets the growing need for energy efficiency, climate-friendly solutions and modern infrastructure.
The company's wide range of products and services is used in areas such as food refrigeration, air conditioning and building heating. The company is active in the field of solar and wind energy, as well as district heating and cooling infrastructure.
Danfoss was founded in 1933 in Nordborg, Denmark by Danish industrial engineer Mads Clausen.
In more than 80 years of its existence, Danfoss has released a whole series that, with the advent of technological progress, have become more advanced and can now be controlled from a smartphone via Bluetooth.
The design of Danfoss thermostats and the principle of operation
The main function of the thermostat is to maintain a predetermined temperature level in the room and, as a result, to correctly distribute energy resources.
The Danfoss radiator thermostat consists of two parts:
- control valve;
- thermostat (thermostatic head, thermostatic element).
Both products are made for various types of pipes and heating systems. The thermostatic element is removable, available in several versions, which in most cases fit all valves.
Thermostat - main element in construction. It is he who reacts to changes in temperature in the room and gives a signal to the valve.
Inside the thermostat is a temperature-sensitive bellows.
bellows- this is a sealed chamber with corrugated walls and a heat-sensitive liquid or gaseous composition (thermal ag. When heated, the corrugated membrane increases in volume, and when cooled, it contracts back.
Inside the thermostat there is a temperature sensitive element consisting of a sealed bellows filled with a liquid or gaseous composition with a high coefficient of thermal expansion. When heated / cooled, the composition increases / decreases in volume, which leads to the fact that the bellows lengthens / shortens.
The coolant passing through heating pipes, heats the composition of the bellows.
Stretching, the bellows presses on the stem, which closes the valve passage and presses on the working cone. The latter, in turn, blocks the flow of coolant in the radiator. When the valve closes, the temperature in the batteries begins to drop to the values set on the thermostat.
The bellows with a gaseous agent reacts to changes in heat in the apartment faster than with a liquid one.
The coolant stops flowing into the radiator, due to which the battery begins to cool. The air temperature in the room drops. Meanwhile, the corrugated walls of the bellows with the inert substance gradually cool down and return to their previous state. The pressure on the working cone stops, the valve opens, and the radiator heats up again.
The principle of operation of the thermostat is to constantly repeat the cycle of heating and cooling the heating agent.
The structure and types of thermal valves
In structure, it is similar to a valve valve, so the principle of its operation is very simple. The thermal valve is designed to control the temperature of the coolant in the hot water supply system.
Valve types
According to their purpose, valves are divided into:
- mixing (mixes hot and cold water);
- dividing (divides into separate streams);
- switching (switches flows).
By type of installation:
- straight,
- angular,
- for right hand radiator installation,
- for left mounting on a radiator,
- three-way.
The three-way valve redirects, mixes and separates the working flow of the coolant in the pipes.
By type of heating systems:
- for a one-pipe heating system,
- for a two-pipe heating system.
By type of materials:
- bronze,
- brass,
- from stainless steel.
As an additional protective coating the valve is nickel plated or chrome plated.
Danfoss thermostatic valves are divided into two types:
- for two-pipe pumping stations heating systems. Official name - RTR-N (RA-N);
- for one-pipe pumping and two-pipe gravity systems. The official name is RTR-G (RA-G).
RTR-N valves have a nominal diameter of 10 to 25 mm. RTR-G- from 5 to 25 mm.
The gravitational (natural) water heating system differs from the pumping (forced) one in that the circulation of the coolant inside the heating radiator occurs due to the effect of gravity. The pumping system assumes the presence of an electric pump.
Types of thermostats
There are three types of heating thermostat heads:
- manual,
- mechanical,
- electronic.
Manual thermal heads have a valve that, when the handle is turned, regulates the flow of coolant.
Mechanical have a more complex structure and can maintain the set temperature in automatic mode. The principle of operation of such a thermostat is to heat the bellows and adjust the flow of the coolant.
Installing a mechanical thermal head is not always possible, for example, if the battery is covered with something or even built into the wall. In such cases, thermostats with a remote sensor are used to make it easier to regulate the flow of coolant.
The thermostatic element is connected to the temperature sensor using a special capillary tube.
It will measure the air temperature in the room. If the temperature rises, the sensor will send a signal through the capillary tube to the bellows. Then there will be a cycle of heating the bellows and its subsequent cooling.
Such thermostats differ from manual ones by increased cost, but they are more accurate, without serious errors (± 1 ° C).
Electronic radiator thermostats slightly larger than their predecessors. Such thermal heads work from batteries, and interaction with the rod occurs due to the built-in microprocessor.
Electronic models have a set additional features, such as a timer. At a time when there is no one in the apartment and there is no great need to warm up the rooms. You can program a lower temperature indicator, and by the time you return, set the temperature higher.
Construction connection types
In addition to thermostatic heads and valves, the scope of delivery of the thermostat includes special adapters that allow the thermostat to be installed on various types of valves.
When choosing a thermostat for a Danfoss battery for a radiator, all characteristics must be taken into account, including the size of the valve seat thread. You can choose a Danfoss thermal valve for the desired thermostat or order a ready-made kit.
Danfoss battery thermostats: what are
Danfoss radiator thermostats are available with built-in and remote sensors to ensure optimum performance and comfortable control. A wide range of valves and additional equipment will allow everyone to install a thermostat in their apartment.
Danfoss thermostats are retrofitted with built-in or external sensor measurement of air temperature in the room. As an additional function, it is possible to equip the device with a protective element against unwanted reconfigurations.
Danfoss thermostats: product range
During its considerable history of existence, Danfoss has released many models of thermostats, many of which are being updated and re-released to this day.
The most popular models are thermal heads of the series:
- RTR 7000,
- RTRW,
- RTRW-K,
Thermostat RTR 7000 (RA 2000)
RTR 7000 series thermostats have options with built-in and remote air temperature sensor. The design is specially designed for class RA radiators. The capillary tube of the latter reaches eight meters in length. A special outer casing protects the thermostatic element from external negative impacts. Almost all models in the series have a gas bellows, valve shut-off function and frost protection. on average from +5 to +26 °С.
The series includes models such as: Danfoss RTR 7090 with built-in sensor RTR 7092 with remote sensor RTR 7094 with protective cover.
Thermostat RTRW (RTRW)
Thermoregulators of the RTRW series have few differences from RTR 7000. Contains liquid agent. Also available with remote and built-in sensor. Temperature setting range varies from + 8 to + 28 °С.
RTRW type includes models: RTRW 7080 with built-in sensor, RTRW 7082 with remote sensor.
Thermostat RTRW-K (RAW-K)
Thermal heads RTRW-K are practically a copy of the previous thermostatic element. The difference is that RTRW-Ks are more versatile and fit many types of heating batteries, including: steel panel radiators type Biasi, Delta, DiaNorm, Diatherm, Ferroli, Henrad, Kaimann, Kermi, Korado, Purmo, Radson, Superia, Stelrad, Veha, Zehnder-Completto Fix.
Temperature setting range from +8 to +28 °С. The device is equipped with the possibility of protecting the heating system from freezing.
The RTRW-K series includes: RTRW-K 7084 with built-in sensor, RTRW-K 7086 with remote sensor.
Thermostat RAX
Thermostatic head series RAX is a thermostat with a liquid built-in temperature sensor. Elegant Design of this product harmonizes even with the most exquisite interior. A distinctive feature of the RAX is the Roman numeral tuning scale. Temperature setting range from +8 to +28 °C.
The series has several modifications in the color range of the body: white, black, chrome and steel.
This is Danfoss Electronic Smart Temperature Controller. The device automatically maintains a comfortable room temperature in the range from +5 to +28 °C.
This model is a novelty in the world market among temperature controllers, which is powered by batteries and can be controlled from a smartphone.
The Danfoss Eco radiator thermostatic head is equipped with features such as open window detection, auto tuning and valve autotest.
For example, if the air temperature in the room drops sharply (the flow of cool air from the street), the valve will automatically close to avoid heat loss. Space heating will restart when the window is closed.
The first week after installation, the device is calibrated and "remembers" the moment at which the heating of the room should begin in order to reach the desired temperature by the set time. To prevent the control valve from clogging over time, once a week, thanks to the device's smart processor, the valve will fully open for automatic flushing.
Also, the device assumes a mode of night and day temperature decrease, and includes all the functions of its predecessors.
The key to sound sleep is a comfortable air temperature in your bedroom. Danfoss Eco can be programmed so that at night the air temperature in the bedroom will be slightly lower, and in the morning it will rise and make your awakening more pleasant.
- living room - +21 °C,
- kitchen - +19 °C,
- bedroom - +20 °C.
You can purchase Danfoss Eco on the website website. There are three product options available here:
| Danfoss Eco thermostat for MagicAir | Danfoss Eco thermostat + MagicAir base station | 2 Danfoss Eco thermostats + MagicAir base station |
| If you already have a MagicAir Base Station with a serial number in the format 310030.XXXXXXXXX or 310040.XXXXXXXXX | If there is no MagicAir base station | If there are two radiators in the room |
 |
 |
 |
PRICE 3 490 ₽ WHEN PURCHASING THE PACKAGE WITH MAGICAIR |
MAGICAIR BASE STATION |
MAGICAIR BASE STATION
|
| 4 490 ₽ |
13 390 ₽ |
16 900 ₽ |
Installing a Danfoss thermostat
Danfoss thermostats are installed at the inlet or outlet of the heating battery. Installation of the device is not difficult, the installation principle for each model is the same. Important point, which should be considered first of all, is the determination of the required height. The recommended height is indicated in the technical specifications of the device.
Every Danfoss temperature control device is calibrated during production to control the air temperature at a certain altitude. Most often, the instructions for the device describe the installation in the upper radiator manifold.
If the pipes pass from below in the apartment and there is only the possibility of a lower saddle connection, in this case you can try to purchase a thermostat with the ability to bottom connection, install a device with a remote sensor or recalibrate the thermostatic element (recommendations for reconfiguring the thermostat are indicated in the model data sheet).
Installation of the Danfoss Eco thermostat does not require tools or special skills, so you can organize its installation yourself. If the radiator is not equipped with a built-in valve or there is a conventional ball valve, it is better to entrust the installation of the thermostat to a specialist of the management company, who will take into account all the installation nuances and features of your heater.
During the heating season, the installation of a thermostat will require shutting off the water in the pipes, which may result in turning off heating from neighbors (in the case of vertical heating distribution). In this case, you need to send a request to management company to turn off the heating at the time of installation of the device.
It is important to pay attention to the details:
- Immediately before installing the equipment, disconnect the radiator from the heating system and drain the water from the battery. (Lay the floor with towels, cloth napkins or newspapers in advance).
- When installing a new valve adapter internal thread cleaned and wrapped with a special water tape, which can be purchased at any plumbing store.
- Installing a Danfoss thermostat on all batteries in a room is not effective. The heat flow must be adjusted for devices whose power is at least 50% of the power of all heating batteries (if two or more radiators are installed in the room).
- Cast iron radiators take longer to heat up and retain heat longer than other radiators. Temperature control equipment in the case of a cast-iron radiator is most often ineffective.
- The Danfoss battery temperature controller has fragile parts, damage to which may impair the operation of the device. Mounting should be carried out with special attention, preventing the device from falling.
- Install the valve strictly in accordance with the arrows indicated on its body. The flow of the coolant must follow the arrows (for exact information on the directions of the arrows, see the installation instructions).
- The valve cap (red in Danfoss thermostats) has a protective function; it does not affect the regulation of the heat supply power.
Thermostat: issue price
Thermoregulators have an adequate cost and pay off within a year. To assess the benefits of installing Danfoss in an apartment or house, it is worth noting that the life of the thermostat, subject to correct installation, is at least 25 years.
The prices of thermoelements vary from 1,300 to 4,500 thousand rubles. The cost of a complete set (valve and thermal head) does not exceed 16 thousand rubles, the initial cost of simple kits is from 1,500 rubles. The price range depends on the models and the presence / absence of an additional headset.
In conclusion of the article, it is worth noting once again that Danfoss has established itself in the global market as a company responsible for the control, quality and energy savings in the home. Devices designed for rational power consumption of heating systems are now in almost every home, and some developers initially lay the possibility of installing thermostats in the overall project.
Danfoss radiator thermostats are endowed with a significant list of useful features that will allow users to easily set up a comfortable microclimate in an apartment or office.
Danfoss Eco will be another advantage for your smart home, and the MagicAir smart microclimate system will simplify the management of the thermostat and other smart climate devices in your household arsenal.
In many countries, up to 40% of energy resources are spent on the needs of ventilation and heating of buildings. This is several times more than in advanced European states.
The need to use
The issue of energy conservation is particularly acute, this is relevant against the backdrop of a constant increase in energy prices. One of the devices that allows you to save thermal energy, is a thermostat for radiators, its installation reduces heat consumption by 20%. To do this, the consumer needs to correctly select the design for the heating system, as well as carry out installation, you can find out about this by reading below.
Principle of operation
The Danfoss thermostat is designed to maintain a constant indoor temperature. For the first time such devices began to be used in 1943. The mentioned company is the market leader in the production and sale of such units. Structurally, the devices have 2 main elements, namely a thermal head and a valve, which are connected by a locking mechanism. The purpose of the thermal head is to determine the temperature environment, to regulate the effect on the actuator, the valve acts as the latter. It is designed to cover the flow of water that enters the radiator. This method of regulation is called quantitative, since the device can affect the flow of water that passes into the battery. There is another method, which is called qualitative, with its help the water temperature changes in the system. This is done through namely This element must be located in or in the boiler room. The Danfoss thermostat has a bellows inside which is filled with a temperature sensitive medium. It can be gas or liquid. The latter type of bellows is easier to manufacture, but does not show such speed as gas counterparts, which is why the latter have become so widespread. At the moment the air temperature level rises, the substance that is in the enclosed space acquires a more impressive volume, the bellows, stretching, has an effect on the valve stem. The latter is moved down the cone, which is designed to reduce the flow area. This effectively reduces water consumption. When the air temperature drops, this process proceeds in the reverse order, and the volume of the coolant increases to the optimum limit, and this is how the Danfoss thermostat works.
Consumer reviews
Depending on what type of heating system is used, as well as what installation technology, thermal heads and valves in different combinations can be used to control the flow of water. If we are talking about a one-pipe system, then a valve should be used, which is characterized by increased throughput and negligible. According to users, the same recommendation can be used in the case of a two-pipe gravity system, where water circulates naturally and is not affected by forced impulse. If you decide to choose a Danfoss thermostat, you can also install it on a two-pipe system, which is equipped with a circulation pump. At the same time, according to reviews, the valve should have the ability to adjust the throughput. It is quite simple, and there is no need to use a special tool for this. After you have decided which valve to use, you should decide on the type of thermal head.
If you are interested in Danfoss - a thermostat, the installation instructions for which will be presented below, you can purchase it at an affordable cost. When determining the type of thermal head, you should be aware that it is offered for sale in some varieties. Thus, a thermoelement can be inside. Among other things, it can be portable. Sometimes the regulator is external. Devices are also programmable, in which case they are electronic. You can also choose an anti-vandal thermal head. According to users who have chosen a regulator with an internal sensor, this device should only be installed if it is possible to position it horizontally. Then the air in the room will freely flow to the body of the device.
For reference
After you have purchased a Danfoss radiator thermostat, you should familiarize yourself with the features of its installation in more detail. Thus, it is completely unacceptable to mount it on a radiator in a vertical position. In this case, the heat flow will constantly rise upwards, and the elevated temperatures from the supply pipeline and the housing will affect the bellows. Ultimately, you will encounter the fact that the device will not work correctly.
Customer reviews on choosing a thermostat
Home craftsmen especially emphasize that in some cases it is not possible to install the device horizontally. Then it is recommended to buy a remote one that comes with a capillary tube. The length of the device is 2 meters. At this distance from the battery, it is recommended to place the device by mounting it on the wall. Buyers emphasize that the lack of the possibility of installing the regulator horizontally does not always indicate the need to purchase a remote sensor. There may be other objective reasons for this. The Danfoss thermostat, the principle of operation of which was described above, cannot be installed behind thick curtains in any way, in this case, of course, best solution will be the acquisition of a remote sensor. Among other things, such a need arises when a heat source is located next to the thermal head or hot water pipes pass. You can resort to this solution, and when the radiator is under a sufficiently wide window sill. In this case, the thermoelement may enter the draft zone. Buyers claim that if at least one of the above conditions is met, then it is best to purchase a remote sensor.
Installation instructions
The Danfoss thermostat, reviews of which are presented in the article, must be installed according to a certain technology. The first recommendation is the exclusion of mounting the thermal head on the heater within sight. Batteries whose general power equal to 50 percent or more of all that are in the same room. Thus, when there are two heaters in the room, the thermostat should be on one battery, whose power is more impressive. If you are interested in Danfoss - a thermostat, the setting of which is quite simple, you can purchase and install it. The first part of the device, which is the valve, should be installed on the supply pipeline. If it is to be inserted into an already assembled system, the supply line must be dismantled. These works may involve some difficulties if the connection is made using steel pipes. The master will have to stock up on a tool for cutting the material.
Conclusion
A fairly popular company today in the market for relevant products is Danfoss. The thermostat (how to adjust it is indicated in the instructions) must be installed on the radiator. The thermal head is then mounted without using additional tool. It is very easy to do at home, in addition, it will save on the purchase of consumables.
LLC "Promarmatura XXI century" 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 carbon dioxide, sulfur compounds and other harmful substances from harming the environment. Radiator thermostats pay off in less than two years, and their standard service life is more than 20 years - great opportunity to save money and energy.
Danfoss radiator thermostats are manufactured with built-in and remote sensors to ensure optimum performance; plus a wide range of valves and accessories make up the widest range our products.
Thermostatic elements of the RA 2000 series
Thermostatic elements of the RA 2000 series are automatic temperature control devices intended for completing RA type radiator thermostats. The radiator temperature controller is a direct-acting proportional air temperature controller with a small proportional band, which are currently equipped with heating systems for buildings for various purposes. The RA thermostat consists of two parts:
All thermostatic elements can be combined with any type RA control valves. The clip connection provides a simple and precise fastening of the thermocouple on the valve. The protective casing of thermoelements RA 2920 and RA 2922 prevents their unauthorized dismantling and reconfiguration by unauthorized persons. Specifications Radiator temperature controllers of the RA type comply with European standards EN 215–1 and Russian GOST 30815–2002.
Technical data for thermostatic elements of the RA 2000 series
The main device of the thermostatic element is the bellows, which provides proportional control. The thermocouple sensor senses changes in ambient temperature. The bellows and the sensor are filled with a volatile liquid and its vapours. The adjusted pressure in the bellows corresponds to the temperature of its charging. This pressure is balanced by the compression force of the tuning spring. As the air temperature around the sensor rises, some of the liquid evaporates and the vapor pressure in the bellows rises. At the same time, the bellows increases in volume, moving the valve spool towards closing the hole for the coolant flow into the heater until a balance is reached between the spring force and the vapor pressure. When the air temperature drops, the vapors condense, and the pressure in the bellows drops, which leads to a decrease in its volume and the movement of the valve spool towards the opening to a position at which the equilibrium of the system is again established. The vapor charge will always condense in the coldest part of the sensor, usually the 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 still heated by the heat given off by the pipeline, the sensor may register more than high temperature than indoors. Therefore, to exclude such influence, it is recommended to install thermostatic elements, as a rule, in a horizontal position. Otherwise, it is necessary to use thermocouples with a remote sensor.
Selecting the type of thermostatic element
Thermostatic elements with built-in sensor
When choosing a thermostatic element, one should be guided by the rule: the sensor must always respond to the air temperature in the room.
Thermostatic elements with an 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, as the thermal effect on the sensor from the valve body and the heating pipe will cause the thermostat to malfunction.
Thermostatic elements with remote sensor
Thermostatic elements with a remote sensor should be used if: o thermoelements are covered with a blind curtain; o the heat flow from the pipelines of the heating system affects the built-in temperature sensor; o the thermoelement is located in the draft zone; o vertical installation of the thermocouple is required. The remote sensor of the thermostatic element must be installed on a wall free from furniture and curtains or on the plinth under the heater, if there are no pipelines of the heating system. When mounting the sensor, the capillary tube must be pulled out to the required length (maximum 2 m) and fixed to the wall using the supplied brackets or a special gun.
Thermostatic elements of the RAW series
Thermostatic elements of the RAW series are automatic temperature control devices designed to complete RA type radiator thermostats. The radiator temperature controller is a direct-acting proportional air temperature controller with a small proportional band, which is currently used 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 a preset flow rate RA-N (for two-pipe heating systems) or RA-G (for a one-pipe system).
The RAW series thermostatic elements production program 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 a 2 m ultra-thin capillary tube that is coiled 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 provides a simple and precise fastening of the thermocouple on the valve.
The technical characteristics of radiator temperature controllers with thermoelements of the RAW series comply with European standards EN 215-1 and Russian GOST 30815-2002.
In order to prevent unauthorized dismantling, the thermocouple can be fixed to the valve using a special retainer (see Accessories).
Specifications of RAW thermostatic elements
The main device of the thermostatic element is the bellows, which provides proportional control. The thermocouple sensor senses changes in ambient temperature. The bellows and sensor are filled with a special temperature-sensitive fluid. The adjusted pressure in the bellows corresponds to the temperature of its charging. This pressure is balanced by the compression force of the tuning spring. As the temperature of the air around the sensor rises, 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 coolant flow into the heater until a balance is reached between the spring force and the liquid pressure. When 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 the movement of the valve spool towards the opening to a position at which the equilibrium of the system is again established. To exclude the influence of warm air from the heating pipe of the heater, it is recommended to install thermostatic elements, as a rule, in a horizontal position. Otherwise, it is necessary to use thermocouples with a remote sensor.
Thermostatic elements series RAW-K
Thermostatic elements of the RAW-K series are automatic temperature controllers with a small proportional band. RAW-K are intended for installation on thermostatic valves manufactured by Heimeier, Oventrop or MNG, built into the construction of steel panel radiators such as 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 frost protection device for the heating system.
Danfoss produces 3 modifications of RAW-K series thermocouples:
The RAW-K 5032 is equipped with a 2 m long ultra-thin capillary tube, which is coiled inside the remote sensor housing, connecting it to the operating 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
The Living eco® electronic radiator thermostat is a programmable microprocessor controller for maintaining the desired air temperature, mainly in residential buildings served by a water heating system. The thermostat is designed to be installed on the valves of radiator thermostats instead of traditional thermostatic elements.
Living eco® has programs P0, P1 and P2 that allow you to control the room temperature at different times of the day.
The P0 program maintains a constant air temperature throughout the day. Programs P1 and P2 can reduce the room temperature at certain times in order to save energy, allowing the heating system to adapt to the lifestyle of the people living in it.
The Living eco® thermostat is supplied with adapters for installation on thermostatic valves from Danfoss and most other manufacturers. The Living eco® thermostat is easy to install and set up, with only three buttons on the panel.
The Living eco® thermostat is equipped with an open window function that cuts off the supply of coolant to the heater in case of a sharp decrease in the air temperature in the room, which reduces heat loss and thereby increases the efficiency of the heating system.
The main characteristics of the thermostat:
Preinstalled Programs
The "long absence" function allows you to lower the temperature in the room when it is not in use. The period of absence and the temperature are set arbitrarily by the consumer.
The choice of programs and their adjustment are made in accordance with the instruction attached to the thermoelement.
Thermoelectric actuators TWA series
Thermoelectric mini-actuators of the TWA series are designed for on-off control of various control valves in heating and heat-cold supply systems of local ventilation installations.
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, having 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 for geometry compatibility and to ensure that it closes. The supply voltage of the actuator is 24 or 230 V. The valves can be normally closed in the absence of voltage (NC) and normally open (NO). In addition, the 24 V normally closed actuator is supplied with a limit switch (NC/S).
Thermostat valves with presetting RA-N and RA-NCX DN = 15 mm (chrome plated)
Control valves RA-N and RA-NCX are designed for use in two-pipe pumped water heating systems.
RA-N is equipped with a built-in device for preliminary (installation) adjustment of its bandwidth within the following ranges:
The RA-N and RA-NCX valves can be combined with all thermostatic elements of the RA, RAW and RAX series as well as with the thermoelectric actuator TWA-A.
To identify the RA-N and RA-NCX valves, their protective caps are colored red. The protective cap must not be used to block the flow of heat transfer fluid through the heater. Therefore, the handle (code no. 013G3300) must be used.
The valve bodies are made of nickel plated pure brass (RA-N) or chrome plated (RA-NCX).
The technical characteristics of the RA-N and RA-NCX valves in combination with the thermostatic elements of the RA, RAW and RAX series comply with European standards EN 215-1 and Russian GOST 30815-2002, and the size of the connecting thread - with HD 1215 (BS 6284 1984). Everything radiator thermostats manufactured by Danfoss are produced in factories with ISO 9000 (BS 5750) quality certification.
To prevent deposits and corrosion, RA-N and RA-NCX thermostatic valves 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. Otherwise, please contact Danfoss. It is not recommended to use formulations containing petroleum products (mineral oils) to lubricate valve parts.
Adjustment to the calculated value is made easily and accurately without the use of special tools. To do this, perform the following operations:
Presetting can be done in the range "1" to "7" in 0.5 intervals. In the "N" position, the valve is fully open. Installation on the dark area of the scale should be avoided.
When the thermostatic element is installed, the presetting is hidden and thus protected from unauthorized changes.
Preset thermostatic valve RA-N with press fitting
The RA-N valve is designed for use in two-pipe water heating pump systems with copper or stainless steel pipelines. Special crimping tools are required to connect the valve nipple to the pipeline. valve body according to appearance and technical specifications identical to standard valves RA-N DN = 15 mm. RA-N can be used with all types of thermostatic elements of the RA or RAW series, as well as with special design thermostatic elements type RAX and thermoelectric actuator TWA-A.
The RA-N control valve is equipped with a built-in device for preliminary (mounting) adjustment of its capacity Kv in the range from 0.04 to 0.73 m3/h.
To identify the valves, the protective cap is colored red. The cap must not be used to cover the controlled medium. For this purpose, a special metal handle (code no. 013G3300) should be used. The valve body is made of DZR nickel-plated brass and the push pin is made of stainless steel. The pin does not require lubrication during the life of the valve. The gland packing can be replaced without emptying 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. Otherwise, please contact Danfoss. It is not recommended to use formulations containing petroleum products (mineral oils) to lubricate valve parts.
High flow thermostatic valve RA-G
Thermoregulatory valve with increased flow rate RA-G is intended for use, as a rule, in single pipe systems water heating with pump circulation 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 for use if mineral oil impurities are present in the coolant.
RA-G is equipped with an oil seal that can be replaced without draining the heating system. The pressure pin in the gland is made of chrome steel and does not require lubrication during 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 (for their identification) protective caps, which must not be used to shut off the flow of the heating medium. 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 thermostatic valve, thermostatic element and shut-off valve with drain function. The innovative self-sealing connection of the valves to the radiator is made with a 1/2 inch thread. Valves and thermocouple are available in white, chrome and steel versions and fit most towel warmers. This kit is the perfect ending to the heated towel rail. Attractive and compact design allows you to install the thermostat under the heated towel rail parallel to the wall, eliminating accidental bumps on it.
The range includes two types of thermostats with different control principles:
- RAX, which regulates the air temperature in the room;
- RTX, which detects and regulates the temperature of the water leaving the heated towel rail. Used on towel warmers and adjusted 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 for sealing the connection between the fitting and the heated towel rail, the second for sealing the connection between the fitting and the valve body. The hexagon socket screw is used to seal the connection between the valve body and the fitting. If the O-rings do not fit the fittings on the heated towel rail, a traditional sealing material is used.