Technical specifications Tehnični_list_WDC_EN.pdf
Guidance WDC10B-WDC10-WDC20_ENG_DEU.pdf
Photo WDC20.tif


WDC weather-compensated controllers are intended for the regulation of room heating and hot water production in single-family houses. 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 for heating systems with one or two furnaces, a heat pump, a hot water buffer tank, and a solar system.



  • 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



  • 52 preset hydraulic diagrams,
  • time-program specific space heating or cooling
  • time-program specific sanitary water heating
  • hot sanitary water preparation using a solar system,
  • regulation of heating systems with reservoir,
  • the option of connecting 2 room units,
  • the BOOST function for space heating,
  • integrated functions for solar system protection,
  • 14 language user interface,
  • startup wizard for an easy and quick startup of the device,
  • diagnostics of operation by prompting to errors and exceeded temperatures,
  • the SeltronHome platform connectivity allowing remote control via smartphone or tablet.

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 relays667
No. of solid-state relays 11
No. of temperature sensor inputs777
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 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 DIN rail   
Simple installation and connection   

Illuminated graphic displayyes
Operating hours counteryes
Weekly programmable timeryes
Mains supply voltage230 V ~ , 50 Hz
Own consumption2,5 VA
Power consumption at standbyMax. 0,5 VA
No. of inputs7x temperature (Pt 1000/KTY)
No. of outputs6x mechanical
1x solid-state
Relay outputs4 (1) A ~, 230 V ~
Triac output1 (1) A ~, 230 V ~
Clock charging3V CR2032 battery (Li–Mn)
Time display accuracy+/- 1 s (24 h) at 20°C
Protection degreeIP20 acc. to EN 60529
Protection class I acc. to EN 60730-1
Operation type1B acc. to EN 60730-1
Temperature sensor typePt1000 or KTY10
Operation type3-point PID
Housing materialASA – thermoplastic
Permissible ambient temperature5 ÷ 40 °C
Storage temperature-20 °C to +65 °C
Weight 419 g
No. of pieces in the packing unit 12 pcs
Dimensions (width × length × height)
113 x 163 x 48mm
Electrical connection