The floor heating thermostat 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 500С. In most cases, the boiler of a private house heats the water much more, and here a thermostat (thermostat) is needed to prevent excessive heat consumption and overheating of the room.
The basic principle of its operation is to turn off the heating as soon as the temperature of the floor or room reaches a certain value. After the floor cools down a little, heating starts again.
Features of the operation of devices
Thermostats are of the following types.
- Programmable - for the execution of 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 in order to save. Adjustment is made by touch buttons. The cost of such devices is the highest, but over time it pays off due to energy savings.
- With manual installationand turning the knob. The device is characterized by simplicity and reliability, but it has much fewer functions.
- Digital regulation - the temperature is set by pressing a button.
The underfloor heating thermostat can be placed in an open way when its body is attached to the wall. It can also be hidden in a wall recess where the rest of the heating equipment is located.
The device can be with manual or automatic control. In the first case, the floor temperature is set by turning the disk with a scale. The method is not very convenient, since it requires constant monitoring and manual adjustment from external factors. The underfloor heating is turned off when the set temperature is reached, but not very accurately.
Automation produces continuous control and regulation. Parameters are configured on the touch panel or remote control.
The thermostat for underfloor heating (water) works only in combination with temperature sensors and a servo drive, where the functions are distributed as follows:
- The sensors are located in the floor screed, the most convenient place in the room, the thermostat housing, or used simultaneously. They transmit temperature signals by wire or radio. Sensors are simple, infrared, remote or double (simultaneous measurement of air temperature in the room and flooring).
- The thermostat processes the data and sends a command to open or close the hot water supply.
- Servo drives change the coolant flow through control valves.
Installing a thermostat with a floor heating system
The connection diagram for a hydraulic underfloor heating with a thermostat requires the installation of all necessary elements.
- The temperature sensor is being 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 must be unheated, otherwise the system will not work properly.
- A servo drive is installed in the heating system, which is responsible for supplying warm water to the circuits. It is a thermal head screwed onto a control valve (two-way or three-way) or connected to a supply manifold circuit. Inside it is placed a bellows filled with a temperature-sensitive liquid. At the signal of the temperature sensor, the heating circuit is closed by the thermostat contacts. This turns on the elements located around the bellows. The liquid expands and the coolant flow is blocked.
- After all connections, the circuit is configured for a certain mode.
Comparison of thermostats
The thermostat for underfloor heating is primarily chosen depending on the price, functions and ease of use. Simple and inexpensive mechanical devices are produced by the German company Eberle. More expensive controllers with programming functions are also produced by the German companies Legrand, Kermi, etc. They can also find simpler and cheaper devices. How to connect the thermostat Kermi, Devireg, "Teplolux", "Jituar" and many others to a warm floor depends on the chosen model. In the installation and operating instructions, everything is described step by step and you should only follow the instructions. There are no special differences in tuning.
It is advisable to purchase a mixing unit with a built-in thermostat that controls the temperature of the coolant by mixing hot and return water flows. It is used for large systems. With only one or two circuits, this is not necessary and the circuit can be easily adjusted manually.
Conclusion
The floor heating thermostat should be selected and connected depending on the system used. It works in conjunction with temperature sensors and a servo drive. When installing simple systems, you can do the work yourself. Complex circuits are assembled and configured by experts.
