Thermostat for underfloor heating: connection and features

The thermostat for underfloor heating controls the heating mode. In a simple system, you can do without it if the temperature of the coolant at the inlet does not exceed 50 ^° C. In most cases, the boiler of the private house heats the water much more and here the thermostat is necessary to prevent over-consumption of heat and overheating of the room.

The main principle of its work is to turn off the heating, as soon as the temperature of the floor or in the room reaches a certain value. After the floor has cooled slightly, the heating starts again.

Features of the devices

Thermoregulators come in the following forms.

1. Programmable - to execute programs of different levels of complexity. With their help you can set the temperature in the premises, change it at different times of the day, depending on the need and for the sake of economy. The setting is made by touch buttons. The cost of such devices is the highest, but in due course pays off by saving energy resources.
2. With manual setting and turning the knob of the regulator. The device is characterized by simplicity and reliability, but its functions are much smaller.
3. Digital regulation - the temperature is set by pressing the button.

The thermostat for a warm floor can be placed open way, when its body is attached to the wall. It can also be hidden in the recess of the wall, where the rest of the heating equipment is located.

The device can be manually or automatically controlled. In the first case, the floor temperature is set by turning the dial with a scale. The method is not very convenient, since it requires constant monitoring and manual adjustment from external factors. Disconnection of the warm floor when the set temperature is reached, but not very accurately.

Automation produces continuous monitoring and control. The parameters can be adjusted on the touch panel or from the remote control.

The thermostat for the warm floor (water) works only in conjunction with temperature sensors and servo, where the functions are distributed as follows:

1. The sensors are located in the floor screed, the most convenient place of the room, the thermostat housing or used simultaneously. They transmit signals about the temperature value by wire or radio. Sensors are simple, infrared, remote or dual (simultaneous measurement of air temperature in the room and floor covering).
2. The thermostat processes the data and commands the opening or closing of the hot water supply.
3. Servo drives change the flow rate of the coolant through the control valves.

Installation of thermostat with underfloor heating system

The scheme of connection of a hydraulic underfloor heating with a thermostat requires the installation of all necessary elements.

1. The temperature sensor is installed. It can be placed in a screed. It is also convenient to place it next to the regulator in order to reduce the influence of the inertia of the warm floor. The wall should be without heating, because the system will not work properly.
2. A servo drive is installed in the heating system, which is responsible for supplying warm water into the circuits. It is a thermal head, wound on a control valve (two- or three-way) or connected to the outline of the supply manifold. A bellows filled with a thermosensitive liquid is placed inside it. At the temperature sensor signal, the heating circuit is closed by the contacts of the thermostat. This includes elements located around the bellows. The liquid expands and the coolant flow overlaps.
3. After all connections, the circuit is tuned to a specific mode.

Comparison of temperature controllers

The thermostat for a warm floor is primarily chosen depending on the price, the functions performed and the ease of use. Simple and inexpensive instruments of a mechanical type are produced by German firm Eberle. More expensive controllers with programming functions are also produced by German firms Legrand, Kermi, etc. They can also find devices easier and cheaper. How to connect the Kermi, Devireg, Teplolux, Jituo thermostat and many others to the warm floor depends on the chosen model. In the installation and operating instructions, everything is step-by-step and only follow the instructions. There are no significant differences in the settings.

It is advisable to purchase a mixing unit with an integrated thermostat controlling the temperature of the coolant by mixing the flows of hot and return water. It is used for large systems. If there is only one or two circuits, this is not necessary and the circuit can be easily adjusted manually.

Conclusion

The thermostat for underfloor heating should be selected and connected depending on the system used. It works in conjunction with temperature sensors and servo. When installing simple systems, you can do the work yourself. Complex schemes are collected and configured by specialists.