Purpose and thermostat wiring diagram for the heating boiler

in the heating system equipment allows for more precise control of temperature in the heated rooms and save on fuel. Set the thermostat for heating the boiler, the owner of the cottage increases by 20-30% efficiency of the boiler equipment and greatly simplifies maintenance yourself.

We will talk about applied in practice kinds of thermostats, on the rules of their location and characteristics of the connection. In our proposed article described in detail the options and instrumentation wiring diagrams. Given our tips you will be able to correctly select the device and set as desired.

The content of the article:

  • How does the heating thermostat?
  • Types of thermostats for boilers
    • Group # 1: Mechanical
    • Group # 2: electromechanical
    • Group # 3: Electronic
  • Schematic diagrams of the connection
  • Conclusions and useful videos on the topic

How does the heating thermostat?

Conventional heating system with water as the coolant consists of a heating equipment or node to a centralized network, internal wiring pipes and radiators.

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To adjust the volume coming from it in a warm room, or have to constantly keep an eye on the boiler or on a regular basis to cover / open valve on batteries.

In this case, the inertia of such a system does not allow to maintain the desired temperature throughout the day at the set level. If more in an oven to impose wood or boiler feed gas, the coolant in the tubes will heat more, the heat through the radiators it also give more.

At low outside temperatures is good. But with a sharp warming on the street at the heat becomes unbearable. Fuel already in the furnace, and the water is hot, get rid of the heat in any way. Plus boiler has and continues to work.

Without a thermostat in the system have to manually turn it off. You can, of course, open the windows to let out the heat and ventilation, but then the bill for fuel for domestic boiler exactly ruin. The conclusion is clear: for the heating thermostat simplifies the accommodation, making it as comfortable as possible.

heating system thermostat

Thermostat (thermostat) - a device for monitoring the temperature in a heated room and increase / decrease in supply heat therefrom

It consists thermostat for the heating system from:

  • thermally sensitive sensor (element);
  • tuner;
  • control module;
  • electromagnetic relay or a mechanical valve.

In the simplest models, the control unit is missing. Everything happens at the expense of pure mechanics, and changes in the physical properties of the temperature sensor.

Such thermostats do not need power. Efficiency and accuracy of the adjustment of the system they are inferior electronic devices, but they are non-volatile. If you have problems with the voltage in the network, they just will not stop working.

The operating principle of the thermostat as follows:

  1. By means of the control unit is set desired temperature.
  2. Upon reaching the required parameters of the sensor is triggered, resulting in the disconnection of the boiler or the overlap of the isolation valve in the heating pipe.
  3. After the fall of air temperature in the room happens reverse inclusion boilers or heaters.

electronic control module allows you to specify more than one temperature indicator, but several times for each day separately. Plus if there is such a block is possible to install an additional temperature sensor outdoors and binding thermostat operation data from it.

The thermostat on the battery

Depending on the type of thermostat device connected directly to the boiler to adjust its operation or at the inlet of the radiator for controlling the volume flow of coolant

Single thermostat - a shut-off valve with temperature sensor, standing on a pipe in the battery. Upon reaching the desired temperature thermostatic valve closes and reduces coolant current. And he opens again when cooling the indoor air, thereby increasing the volume of the incoming heat.

More complex and advanced models suggest the presence of wireless sensors and control units. All communication between the individual elements takes place via radio. The wires in this case is not laid, which has a positive effect on the aesthetic side of the placement of such thermostats in the room.

Types of thermostats for boilers

The main difference between the thermostat - a heterogeneous heat-sensitive sensors. Some are set in the heating pipe, the other inside it, while others are mounted on the wall. Some are designed for the measurement of air temperature, and the second - the coolant.

Choice of thermostat depends on the model:

  • type boiler;
  • a wiring circuit of the heating system;
  • space availability;
  • required functionality.

Many modern boilers are pre-designed for connection to him thermostats. Moreover, the manufacturer of the boiler equipment immediately in the log registers all the nuances of the installation.

electronic Temperature Controller

If the selected electronic model of the thermostat, it is best to give preference to the most efficient - one that is recommended by the developer of the boiler

Ideally the thermostat should regulate the heating device directly, i.e. supplying fuel therein. This is the most efficient in terms of fuel economy wiring diagram. Energy source in this case will be burned just as much heat is required.

But such a thermostat will be installed only on gas or electrical heating unit. If solid fuel boiler, It will adjust the room temperature thermostat with a mechanical valve, which is already mounted on the pipe.

Mounted on the battery controllers are designed to overlap the water supply temperature is too high in a room or in the coolant. The boiler in this case ceases to work a little later, when he works within its own temperature sensor to prevent overheating of the equipment.

Group # 1: Mechanical

The basis of the thermal sensor by altering the mechanical characteristics of the material changing its temperature. This is an easy to implement, low-end, very efficient and totally independent from the power supply option. It is designed for installation in pipes a water heating system to regulate the flow coolant.

The simplest mechanical thermostat

A classic example of a mechanical thermostat - the device with the needle valve (constipation) and thermal head-bellows

As is responsive to changes in the medium temperature mechanical thermostats are used:

  • gas;
  • liquid.

When heated liquid gases expand, which results in their pressure on the plunger of the isolation valve. By reducing the temperature they are compressed, the spring latch returns back again and the heated water flows through the pipes to radiators.

For thermostats on the battery characterized by poor sensitivity and high accuracy adjustment. They are activated only when the temperature rises by 2 degrees or more. Plus, over time, the bellows filler loses its characteristics, the numbers on the knob set the required temperature parameters and real degrees begin to diverge.

Such thermostats large enough. The vast majority are designed for measuring the water temperature in batteries rather than room air. Often, precisely adjust them the way you want the owner of the house, it is difficult.

Group # 2: electromechanical

The instruments operate on a similar principle purely mechanical counterparts. Just as the temperature sensor is used a metal plate.

When heated, it bends and closes the contact, and when cooling is returned to its original position and breaks the circuit. And within this loop the signal is feed to the burner control unit.

Driving the electromechanical installation controller

Electromechanical thermostat require power, it regulates the coolant flow valves or burners in the boiler operates via electrical signals

Another embodiment of the electromechanical thermostat - a device with a sensor in the form of two strips of different metals. In this case, the temperature sensing element is installed directly in the coal-fired boiler furnace.

At high temperatures between the plates a potential difference acting on the electromagnetic relay. Contact the latter is opened, the interlock. The result is an on / off charge air in the combustion chamber.

Group # 3: Electronic

This kind of thermostats for boilers refers to the volatile category. Such devices have a remote sensor that monitors the room temperature, and a full display controller.

Electric boilers for these thermostats are mandatory extension. Without them, the electric heaters will work non-stop, warming the air or coolant is too much.

Electric boiler with a built-in thermostat

Running on electricity boilers and boilers in most cases equipped with a thermostat at the factory

The electronic thermostat has two main elements:

  1. Temperature sensor.
  2. Microcontroller.

The first measures the temperature, and the second control signals, and outputs it to the increase / decrease in supply of thermal energy into the room. The sensor can be sent to the controller analog or digital signal. In the first case the thermostat capabilities similar mechanical analog only greatly exceed its precisely measuring temperature characteristics.

Digital thermostats - is the pinnacle of the development of these devices. They allow you to adjust the advance of teplopodachu preset algorithm. Plus, it is possible to connect more sensors located both in the rooms and on the street.

Many electronic thermostats have the option of remote control via infrared or cellular connection. This allows you to adjust the room temperature, not only with the remote in the room, but also from any point outside of it.

For example, even coming home from work, you can send a signal to the heating room air to comfortable settings, and your arrival the house will appreciate the comfort and warmth.

Electronic devices for automatically adjusting the qualitative and quantitative characteristics of the coolant, are an essential component Heating systems in smart homes. They encourage you to read the device.

Schematic diagrams of the connection

All ways to incorporate the thermostat in the heating system are divided into three options for connecting:

  1. Directly to the boiler.
  2. To the circulation pump.
  3. On the tube, feeding the coolant into the radiator.

The first two schemes exclude deterioration of throughput in the heating system. It is no more constipation does not fit, the flow resistance of the entire system is not affected. Thermostat herein controls the operation of the pump only or the boiler with water it is "not in contact".

When installing the battery temperature control or overall multi-tube radiators flow resistance, on the contrary, increased. Even in the fully open state of the thermostat valve slightly slows down the movement of the coolant.

Ideally, the boiler piping project must be carried out immediately with all the thermostatic and other devices.

Wiring diagram

Embedding thermostats in existing heating pipes should only be a last resort, the maximum the effectiveness of their use can only be achieved when you turn them in at the design stage

If the hot water heating system in the house is made of one pipe scheme, The third option is better to refuse. When triggered, the temperature sensor valve will block immediately all branch radiators in several rooms, and then about the comfort in distant areas of the boiler can immediately forget.

Connect the thermostat to the radiator input goes through bypass. So it when triggered to redirect the flow of coolant to bypass the battery. The water is returned back to the boiler is still hot from previous. Last stops its heating, thereby reducing the consumption of electricity or fuel gas.

Thermostat Installation rules

When installing the thermostat temperature sensor must adhere to certain rules, or under the influence of neighboring devices or objects it will falsely trigger

The temperature sensor should be installed:

  • in a place where it is not exposed to direct sunlight;
  • away from the cold bridges, rising drafts and heat flows from the radiator;
  • so that it is not covered as decorative screens or curtains;
  • at a height from the floor between 1.2-1.5 meters.

If improperly installed thermostat sensor will give false signals. This can lead to overheating, not only the air in the room, but also in the coolant system. In the second case a short time and to problems with the boiler.

Conclusions and useful videos on the topic

Any difficulties with the installation thermostat should arise. It need only to choose the right for a particular heating system. And the video you selected in this will certainly help.

Video # 1. Connecting the room thermostat to the boiler on the gas all the nuances:

Video # 2. Overview Wall thermostat:

Video # 3. Technology inclusion in contact thermostat with a circulating pump:

Addition to the boiler in the form of a thermostat - it's a great way to save on the heating housing, increase the comfort of living and reduce the wear of heating equipment heat transfer fluid. Money spent on paying off thermostats for one winter season.

You can choose as a simple mechanical version with manual control, and a more advanced device with a programmer.

Want to tell us how it works with the boiler thermostat in your home country? Possess information which could be helpful to visitors? Please write comments, ask questions, publish pictures of the article located in the block below.

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