Maintaining a constant room temperature is not only necessary for comfortable living, but also important for health. This is especially true for children’s rooms and bedrooms.
The easiest and most correct way to regulate is to change the supply of coolant to the heating radiator. Wherein a simple valve is not as convenient and versatile as a temperature controller for a battery.
The benefits and necessity of a thermostat for a battery
Another name for this device is a radiator thermostat. It is a special mechanism that is built into the pipe leading to the radiator and, in accordance with the specified parameters, regulates the supply of coolant to the battery.
Using a thermostat has several advantages.
- Thermostat in automatic mode allows you to maintain a comfortable temperature.
- The control is carried out zonal, that is, in each room you can set individual parameters.
- Device allows you to significantly save electricity, gas or other fuels in private houses. If a heat meter is installed in the apartment, then the thermostat provides a reduction in the amount of utility bills.
At the same time, the simplicity of the device and the principle of its operation are combined with a long service life.
The principle of operation of the temperature controller
The design and operation of a radiator thermostat is quite simple.
The device consists of a valve and a thermal head.
Inside the latter is a cylinder with a corrugated wall — a bellows. It is filled with a working medium (liquid or gas).
The bellows is connected by means of a rod to a valve that changes the flow of the coolant.
The principle of operation of the heating regulator is based on the property of gas and liquid to change their volume with temperature fluctuations.
- If the room gets colderthen the volume of the working medium decreases, the bellows is compressed, the stem rises and the valve begins to let more coolant into the radiator.
- As the temperature rises the bellows, on the contrary, is stretched, so the valve blocks the flow of heat into the battery.
This is how the simplest and most reliable mechanical regulator works, which is most often used in private houses and apartments.
It can be influenced by a number of factors:
- the presence of drafts
- sun exposure,
- nearby sources of cold and heat,
- temperature indicators of the external environment.
The main types of thermostats for heating
The most common classification of thermostats for radiators is based on the type of sensitive medium with which the bellows are filled: gas or special liquid. According to this device setting divided into liquid and gas-filled.
The first option is more common today and cheaper. But the second is more reliable.
During operation, the difference between a gas-filled thermostat and a liquid one is manifested by two parameters:
- the speed of reaction to a change in the temperature of the environment;
- the degree of influence of the coolant temperature.
Gas-filled react to temperature fluctuations indoors faster. This is due to the fact that the gas condenses in that part of the device, which is remote from the base of the valve body, so the effect of the coolant on the regulator medium is minimal.
In addition to the type of thermocouple, thermostats differ from each other depending on whether they can be installed on a single or double-circuit heating system. In their installation there are small nuances.
According to the control method, thermostats for heating can be divided into mechanical and electronic, the latter type is usually equipped with two temperature sensors.
Installing a thermostat
The heating system regulator is installed on the radiator at the place where the coolant is supplied. At the same time, for the effective operation of the control device several rules must be followed.
- Do not install the thermostat in a vertical position. So it will be exposed to the action of ascending currents of warm air from the radiator.
- From the floor to the thermostat must be at least 0.8 m.
- The appliance must not be placed in a niche or covered with curtains., screens, etc. If this cannot be avoided, then you can use a thermostat with a remote sensor. The latter is fixed to the wall.
- Temperature controllers are not recommended to be installed on cast iron radiators.
- In a private multi-storey building, the installation of a thermostat should be started from the upper floors, in apartments — from rooms where temperature fluctuations are maximum, for example, from south-facing rooms.
Another nuance concerns the method of preparing the heating system. depending on what type it belongs to: one- or two-pipe.
In the first case between the inlet and outlet pipe, it is necessary to install a jumper pipe, which is called a bypass. This design will allow the coolant to circulate through the riser system even if the regulator valve is closed.
The bypass diameter must be 1 size smaller than the diameter of the main heating pipes.
In any system, a regulator is installed on the upper pipe, and a valve is installed on the lower pipe.
Otherwise, the installation principle is the same and performed according to a simple step-by-step instruction.
Step 1. Turn off the heat supply to the heating riser.
Step 2 Remove coolant from the system.
Step 3 Cut off the radiator with small sections of horizontal pipes.
Step 4 Sections of cut pipes and valves, if any, are unscrewed from the battery.
Step 5 Shanks and nuts of a new valve and thermostatic device are screwed into the radiator plugs.
Step 6 If necessary, install in the bypass.
Step 7 Connect a system of pipes and valves, including a thermostat, necessary to connect the radiator to the heating system.
Step 8 Connect the radiator with the strapping to the riser.
After installation, you need to configure the regulator.
- Take measures to prevent air exchange in the room: close windows and doors, turn off the exhaust device.
- Turn the adjuster to fully open the valve.
- While the coolant is being drawn into the radiator, a thermometer is installed in the right place. Where they want the air temperature to have a certain value.
- When the air warms up and the thermometer shows that it has become warmer by about 6aboutC, close the valve.
- Observe the thermometer readings. As soon as the desired temperature is reached, the thermostat begins to open. Do this until the sound of water is heard, and the thermostat housing becomes hot.
It remains only to remember the indicator on the thermostat. The device is ready to work.
For successful operation, it is necessary to fully open the valve for the summer period.
For information on how to properly install and configure the temperature controller on the battery, see the video:
Thermostat manufacturers. How to choose a product?
If you decide to buy a thermostat, then you can find it in almost any store that specializes in selling plumbing and heating equipment. Prices for standard mechanical thermostats for radiators are quite affordable. An electronic thermostat for heating will cost you much more.
There are several manufacturers representing thermostats on the European market. Of these, 2 won more customer confidence.
- The most popular is the Danish company Danfoss (Danfoss), producing both liquid and gas-filled devices. The price for the first is about 8 dollars. Gas-filled ones are somewhat more expensive — about 10 dollars.
- The German company Oventrop produces liquid regulators, the price of which is from 6,5 dollars and above. Models with a remote sensor are much more expensive — about 1500–20 dollars.
When choosing a device, you need to pay attention to the fact for which network it is suitable.
So, at Danfoss, products labeled RTD‑G are suitable for one-pipe networks and a two-pipe heating system without a circulation pump. RTD‑N is applicable for two-pipe networks of high-rise buildings and cottages, if there is forced circulation in the system.
Before buying, you need to make sure that there is a certification and a warranty period of at least 3 years.
A carefully selected and correctly installed thermostat on the radiator will improve the microclimate of the premises, as well as save money, especially when it comes to a cottage.
In the following video, watch an overview of Danfoss thermostats: