The COMPUTHERM B400RF Wi-Fi room thermostat has been specifically designed to control heating and cooling systems. The thermostat connects your smart phone, laptop or computer to the device to be controlled remotely.  With the help of B400RF you can set the temperature of your home hour by hour, and you can set and control it via the Internet. The wireless temperature sensor sends the measured temperature to the connected B400RF.

Turning  on  and  off  the  controlled  appliance  allows  you  to  maintain  constant  comfortable temperature without suffering any unnecessary energy losses. This product is especially useful when you do not use your flat or house according to a predefined schedule, you leave your home for an uncertain period of time during the heating season or you intend to use your holiday home during the heating season as well.

In addition, the thermostat is also suitable for controlling electrical and electronic devices which can be turned on and off by interrupting and resuming power supply.

With B400RF you can set your desired temperature for every hour of the day and night. This way the temperature in your home always meets your requirement. It provides comfort without consuming energy unnecessarily. It always consumes as much energy as needed and you can save up to 30 percent of your heating costs. In addition, remote control can also save energy for you because this way you can remotely turn off the device to be controlled when you are away then turn it on later.

COMPUTHERM B400RF type switching-mode room thermostat is able to control vast majority of the boilers and air-conditioning equipment available on the Hungarian market. It can be easily connected to any gas boiler or air-conditioning equipment which has a two-wire room thermostat connection point, irrespective of whether it has a 24 V or 230 V control circuit. In addition, the thermostat is also suitable  for  controlling  electrical  and  electronic  devices  which  can  be  turned  on  and  off  by interrupting and resuming power supply.

Owing to its characteristics, B400RF is most suitable for controlling heating systems but it can also be used to control air-conditioning equipment. For controlling a cooling system the working mode of the thermostat should be changed in its settings.

No, the appliance is able to control air-conditioning equipment and any other device which can be operated only by its ON/OFF function. In the settings menu it is possible to switch between the different working modes.

To operate the central unit with a color touch display, a voltage of 5 V DC is required, which can be provided by connecting the mains adapter and micro USB cable included in the basic package of the device to a 230 V mains power source. The receiver works directly from a 230 V mains power source. No batteries are required to operate the device.

Search this product at our reseller partners. The list of our reseller partner is available at the following link: https://computherm.info/en/foreign_partners.

Instructions for installing and operating B400RF are available at the following page: https://computherm.info/sites/default/files/COMPUTHERM_B400RF_EN_Manual_2020-1.pdf

If you use an Android operating system you can download the application from Google Play Store. If you use iOS operating system you can download the application from App Store. The name of the application is COMPUTHERM B Series.

The number of the appliances is unlimited. Every commissioned B400 appliance can be added to your phone application and can be controlled from your phone.

It depends on the type of the batteries and the distance between the temperature sensor and the central unit but the average lifetime is 18 to 24 months.

To install and modify the settings it is necessary to have a Wi-Fi network with Internet. After that the thermostat can work without Wi-Fi connection according to its settings. While the thermostat is inaccessible via the Internet, you can manually turn on and off it with a button located on the side of the appliance as described in Subchapter 7. e) of the Instruction Manual. Even so to use the thermostat comfortable it is recommended to connect the thermostat to a stable Wi-Fi network with Internet.

For more detailed information please refer to the Instruction Manual of the appliance or watch the video which demonstrates installation and use of the appliance: https://www.youtube.com/watch?v=WesTfVpEEM4

It is expedient to locate the temperature sensor where you stay regularly or a long period of time so that the sensor is oriented in the direction of the natural ventilation of the room but is not exposed to draught or extreme heat (e.g. sunlight, refrigerator, chimney, etc.). Its optimal location is at a height of 1.5 m from the floor level.

When choosing the location of the main unit you should remember that bulky metal objects (e.g. a boiler, buffer tank, etc.) and metal building structures may have an adverse effect on propagation of radio waves. If it is possible, in order to ensure trouble-free RF connection, we recommend that you install the main unit at a height of 1.5 to 2 m and at a distance of 1 to 2 m from the boiler or other bulky metal constructions. We recommend that you check reliability of Wi-Fi connection at the place selected before installing the main unit. Do not install the main unit under the housing of the boiler or near hot pipes because it may damage the parts of the device or compromise Wi-Fi connection. We also recommend that the power is preferably supplied to the main unit from a socket other than that of the boiler (and from another phase, if it is possible), and line power must not be supplied to the main unit from the boiler on any account.  To avoid electric shock, entrust a specialist with connecting the receiver unit to the boiler!

Yes, you can connect several more wired and wireless temperature sensors simultaneously to a single appliance according to the Instruction Manual, but you can control the heating process only by one of the sensors, while the other sensors can only be used to provide information.

The device has potential-free output connection points, so in normal case the 230 V does not appear on its output, only the 2 attached wires are connected or disconnected from each other when the thermostat switches. If you wish to have the 230 V on the output when the thermostat switches then you should connect the phase wire to the NO of COM connection point so the thermostat according to the manual instruction. Before you connect the phase wire, make sure that it is disconnected from the electric power supply. The device must be installed and connected by a qualified professional.

If it is possible, put the router closer to your B400RF appliance. Another option is to place a Wi-Fi signal booster between the router and B400RF to extend the range of the router.

If the appliance cannot be controlled via the Internet because the application indicates that the appliance is inaccessible and does not respond to the modifications then the connection between the appliance and the web interface has been interrupted. This situation may be due to several reasons. The problem is most probably caused by the Wi-Fi router being used. It is expedient to restart the routers from time to time by interrupting and restoring power supply. In most of the cases this type of problems is solved by restarting the router. If the appliance is still inaccessible at the front end after a few minutes have elapsed then it is recommended that the appliance is reconnected to the Wi-Fi network according to Chapter 4.5 of the Instruction Manual. If the connection is successful but the appliance is still inaccessible then it is recommended that the router is set to factory default, because it may occur that the device cannot be connected to the Internet because of some settings. While the thermostat is inaccessible via the Internet you can manually turn it On/Off according to the Subchapter 7. e) of the manual.

After the power supply is restored the appliance continues to function according to the settings defined before the power outage (or according to a preset program in programmable mode).

Press and hold the button located on the side of the product for 3 seconds.  Following this, release the button for 1 second then press again and hold it down for 3 seconds.  Now you can release the button and the product is set back to factory default setting.