KXD controllers are the new generation of powerful boiler and weathercompensated controllers, which also provide the control of room heating and domestic hot water heating in addition to the liquid fuel boiler control. They provide control of one or two heating circuits, switchover between heat sources, and the protection of the return line during the storage tank loading. They are used with liquid fuel boilers.

Product range:

Start-up wizard

Step 1

Step 2

Step 3 and 4

The KXD controller is equipped with a start-up wizard, which takes you through the initial settings of the controller in 3 or 4 steps.
Step 1: language selection.
Step 2: hydraulic scheme selection.
Step 3: setting the heating curve for the first heating circuit.
Step 4: setting the heating curve for the second heating circuit.

Emission measurement and stb testing

The mode for measuring flue gas emissions is activated by pressing the key. In this mode, the controller activates the boiler to enable burner setup and emission measurements.
By pressing the STB key, we activate the thermal fuse test. In this mode, the controller starts the boiler and heats it to 110°C or until the STB fuse switches it off. The red-coloured STB symbol informs that the thermal fuse is active.

KXD Controller installation

The KXD controller may be installed in a pre-prepared aperture on the boiler or on the external boiler panels be means of a console. If that is not possible, it can be also installed on the wall.

Example installation into a cutout or an aperture on the boiler

Example of installation on the wall

Remote control with the help of SeltronHome system

The KXD controllers may be connected to the SeltronHome platform, which allows for the heating remote control using a smartphone or tablet. Remote control is enabled through the CLAUSIUS application for the final user and the KELVIN app for service technicians. In addition to remote management of the heating, the applications also provide an easy overview of the consumption and monitoring of heating oil costs.

Typical hydraulic connection

Oil boiler, mixing circuit, domestic hot water storage tank.
Example: hydraulic connection 401.

Liquid fuel boiler control   
Radiator room heating system control   
Floor heating or cooling system control   
Convector heating or cooling system control   
Wall or ceiling heating or cooling system control   
Domestic hot water heating,
No. of preset hydraulic schemes71752
No. of room units222
No. of mechanical relays789
No. of solid state relays11
No. of temperature sensor inputs888
No. of analogue outputs (0÷10 V or PWM) for the control of the circulation pump or an energy
BUS option – the interconnection of KXD controllers and connection with other Seltron controllers   
Possibility of USB connection to a PC   
Connectivity to the SeltronHome platform providing remote control using a smartphone or tablet