Thermostat for a heating radiator — devices for maintaining the desired temperature in the room

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Temperature controller for batteries

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

Battery RegulatorsAnoth­er 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.

  1. Ther­mo­stat in auto­mat­ic mode allows you to main­tain a com­fort­able tem­per­a­ture.
  2. The con­trol is car­ried out zon­al, that is, in each room you can set indi­vid­ual para­me­ters.
  3. 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 design of the radiator thermostat

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.

  1. 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.
  2. 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 thermostat

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.Installing the regulator on the battery

  1. 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.
  2. From the floor to the ther­mo­stat must be at least 0.8 m.
  3. 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.
  4. Tem­per­a­ture con­trollers are not rec­om­mend­ed to be installed on cast iron radi­a­tors.
  5. 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.

Bypass in the heating system

Bypass con­nects the direct and return heat­ing 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.

Setting the temperature mode

  1. Take mea­sures to pre­vent air exchange in the room: close win­dows and doors, turn off the exhaust device.
  2. Turn the adjuster to ful­ly open the valve.
  3. 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.
  4. When the air warms up and the ther­mome­ter shows that it has become warmer by about 6aboutC, close the valve.
  5. 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.

  1. 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.
  2. 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:


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