Connecting the thermostat to a gas boiler

The most modern and technological models of gas boilers are equipped with a thermostat. This device allows you to determine the temperature and humidity of the air in the room, and according to the measurement results it regulates the power of the boiler. When the temperature rises, the boiler power is turned off, and if it is too low, it turns on. This function is especially beneficial in cases where a gas meter is installed - turning off the equipment reduces its consumption. In addition, the use of such devices allows you to maintain a comfortable microclimate in the room, do not let the air get too hot.

How to connect a thermostat to a gas boiler

If you have an old or simply too simple model of gas technology, you may be required to connect the thermostat yourself. This is not difficult to do, the main thing is to follow the instructions and check the documents for the gas boiler itself and the equipment connected to it.

Necessary tools and materials

One of the main advantages of connecting the thermostat to a gas boiler is that it does not require any special tools or special skills. All that is needed to install the thermostat on a gas boiler is part of the basic equipment set. You will need a technical passport of the gas boiler and documents for the thermostat to verify the schemes and make sure they are compatible. You will also need a conventional screwdriver, a tester to determine the voltage in the mains, as well as tools for installing the device on the wall in the room. In some cases

Important! A complete set of tools depends on the model of equipment and installation location. Which you choose.

Important points to connect

The most important point is the choice of the sensor model you need. Thermostats come in three types: mechanical, electromechanical and electronic. The first two types are installed directly in the system and measure the temperature of the coolant. Such devices can be equipped with old models of gas equipment. Their installation is not only complicated, but also impractical. If you want to install a thermostat for a heating system, it is better to choose a modern electronic model. It is connected to the boiler and determines the temperature not of water in the system, but of air in heated rooms. Comfortable temperature in such devices can be set through settings. If the threshold is exceeded, the device gives a signal to the boiler and disables its operation.

In order for the thermostat to measure the actual temperature and humidity in the room, the following rules must be followed when installing it:

• The height of the regulator should be slightly less than the height of a person, from one and a half meters to 1.7 meters.
• The device must be installed at a distance of not less than a meter from heating devices and any equipment that heats up during operation, as well as from fans and air conditioners - all this will distort the readings of the device.
• The effects of draft or ventilation on the regulator must be minimized.
• The sensor must be in a heated room - otherwise its readings will be underestimated.

Important! If your home has underfloor heating installed, it is best to purchase a model of thermostatic device that has an additional temperature sensor installed near the floor. It detects air temperature in the lower zone and provides more accurate readings.

Step-by-step instructions for connecting the thermostat to a gas boiler

Installing a thermostat on a gas boiler can be divided into two stages: installing the device on a wall in a room and connecting it to a heating boiler.

Installing the device on a wall should be carried out in accordance with the instructions attached to it. When the thermostat is fixed at the required height, it is necessary to lay the wire from it to the boiler. When laying wires, you can use both open and closed method. When connecting the control device to the heating equipment, proceed as follows:

• One end of the cable connects to the regulator pins labeled NO and COM. On wireless models, connection terminals can be found in the relay box.
• The marking and connection point of the second end of the wires can be found in the instructions for the gas boiler.
• Access to the connectors and the gas equipment control board can be obtained by removing or sliding the front panel.
• There may be a jumper between the terminals required for connection. It should be removed, but not discarded.
• Connect the other end of the wire connected to the thermostat to the terminals.
• If the thermostat is wireless, a three-wire power cable with an earthing circuit must be connected to the second relay unit.

Important! If the marking on the thermostat differs from the standard, you can find the necessary terminals using the tester. Between the terminals you need, the circuit must be open.

It is also important to remember that some models of heating equipment do not work with thermostats. They have a gas valve that responds only to mechanical influences, so electrical adjustment of the operation of such a heating boiler is impossible. Most often, these are produced non-volatile models of gas equipment.