Technical specification Tehnični_list_KXD_EN.pdf
Guidance KXD10B-KXD10-KXD20_ENG_DEU.pdf
Photo KXD20-front.tif


KXD controllers are the new generation of powerful furnace and weather compensated controllers, which also provide the regulation of the room heating and hot water production in addition to the regulation of liquid fuel furnaces. They are used with liquid fuel furnaces. They allow for the regulation of one or two heating circuits, switching between heating sources, and the protection of the return line during the charging of the supply device. They are used with liquid fuel furnaces.



  • Regulating liquid fuel boilers
  • Regulating radiator space heating system
  • Regulating floor heating or cooling system
  • Regulating convector heating or cooling system
  • Regulating wall or ceiling heating or cooling system
  • Hot water preparation



  • it regulates the boiler and space heating;
  • it features all the safety functions for boiler protection;
  • it can be mounted on the wall, in the boiler housing or with the help of a console to the boiler coat;
  • 52 preset hydraulic circuit diagrams;
  • space heating or cooling according to the time program;
  • hot water heating according to the time program;
  • solar hot water heating;
  • regulating heating systems with a hot water buffer tank;
  • the possibility of connecting 2 room units;
  • BOOST function for space heating;
  • built-in solar heating system protection features;
  • 14 language user interfaces;
  • startup wizard for an easy and quick device startup;
  • operational diagnostics featuring error and excessive temperature warnings;
  • remote control with the help of SeltronHome system.

Regulating liquid fuel boilers   
Regulation of radiator space heating system.    
Regulation of floor heating or cooling system.    
Control of convection heating or cooling system.   
Regulation of the wall- or ceiling-mounted heating or cooling system.   
Hot sanitary water preparation.    
No. of preset hydraulic diagrams71752
No. of room units222
No. of mechanical relays789
No. of solid-state relays11
No. of temperature sensor inputs888
BUS option – WDC controller interconnections and connections with other Seltron controllers   
Heating system with radiators   
Floor heating system   
Convector heating system   
Wall and ceiling heating systems   
Hot water heating system   
Direct heating circuit   
Mixing heating circuit   
Direct and mixing heating circuit  
Two mixing heating circuits 
Hot water heating   
Switching between direct heating circuit and hot water heating   
Hot water circulation   
Automatic switching between heat sources 
Regulation of the stand-pipe temperature constant   
Single-stage charging of the hot water buffer tank 
Solid fuel boiler   
Solid fuel boiler with pellet heater 
Liquid fuel boiler   
Liquid fuel boiler with two-stage burner   
Combined boiler 
Gas flow boiler 
Heat pump 
Supply device   
Additional heating using electricity   
Solar collectors  
Using a primary heating source   
Using a hot water buffer tank   
Using a solar heating system  
Space heating or cooling according to the time program   
Automatic winter/summer mode switching   
PARTY function – a simple prolonging of comfort heating   
ECO function – activation of the economy operation mode   
HOLIDAY function – activation of the operation mode during the holiday season   
Hot water heating according to the time program   
One-off – instantaneous switching on of hot water heating   
BOOST function for space heating   
Function for floor foundation drying   
Protection against Legionella bacteria (at the controlled energy source)   
Supply device protection when overheating   
Boiler protection against overheating   
Protection against the freezing of collectors  
Forced switching on of the pump at the maximum temperature of the collectors  
Switching off of the collectors when the safety temperature has been exceeded  
Solar heating system protection when collectors are overheating  
Supply device protection when overheating  
Supply device re-cooling to the desired temperature  
Periodic starting up of pumps and mixing valves during the period of inactivity   
A comprehensive overview of the heating system operation   
Graphic display of temperatures according to days of the last week   
Detailed display of temperatures for the current day   
Operational self-diagnostics featuring error warnings and notifications regarding excessive temperatures   
The possibility of USB connection to a PC   
The SeltronHome platform connectivity allowing remote control via smartphone or tablet   
Startup wizard for an easy and quick device startup   
14 language user interfaces   
Setting up the operation by selecting the hydraulic circuit diagram   
“Help” button for quick help with settings   
Graphically adjustable time programs   
The option for simulating system operation   
Logging and display of changes made to settings   
Option for retrieval of basic settings in the event of data loss or unwanted changes   
Option for programming free outputs   
Possibility of mounting to a wall or into a cutout (opening)   
Simple installation and connection   

Illuminated graphic displayyes
Operating hours counteryes
Weekly program clockyes
Integrated thermal protection STByes
Power supply230 V ~ , 50 Hz
Energy consumption4,5 VA
Power consumption at standbyMax. 0,5 VA
No. of inputs8 x temperature sensor (Pt 1000)
No. of outputs9 x solid state relays
1 x electronic
Relay outputs4 (1) A ~, 230 V ~
Triac output 1 (1) A ~, 230 V ~
Clock chargingBattery CR2032 (Li-Mn) 3 V
Time display accuracy+/- 1 s (24 h) pri 20 °C
Protection degreeIP20 acc. EN 60529
Protection classII acc. EN 60730-1
Operation Type1B acc EN 60730-1
Temperature sensor typePt1000 or KTY10
Operation Type3-point PID
Housing materialASAPC
Permissible ambient temperature5 ÷ 40 °C
Storage temperature-20 °C ÷ +65 °C
Weight784 g
No. of pieces in the packing unit6 pcs
Dimensions (width × length × height): 211 x 96 x 53 ( 58) mm
Electrical connection