AHC40 is a compact weather compensated heating controller, installed in the motor housing. It allows a direct mounting on over 20 types of mixing valves of various manufacturers. The controller may also be used with the outdoor sensor, but in that case, the room unit must be installed.

Application AHC40

  • The AHC controller is used in demanding room heating and cooling systems as an extension controller (it is possible to link several controllers into a complex system with a BUS connection)
  • For controlling simpler heating systems with one mixing circuit system


Advantage AHC40

  • you can use it as an expansion controller in more complex space heating or cooling systems,
  • you can use it for control of simple heating systems with a single mixing circuit,
  • built in the actuator housing with direct mounting onto the mixing valve,
  • innovative connector system for connecting sensors,
  • direct installation to more than 20 mixing valves,
  • adjustable return flow temperature,
  • 2 preset hydraulic diagrams,
  • multiple controllers can be interconnected into a complex system using the BUS connection,
  • for configuration and monitoring, it is fitted with a graphic capacitive OLED touchscreen display
  • the option of connecting 1 room unit,
  • the SeltronHome platform connectivity allowing remote control via smartphone or tablet.

The AHC controller is used in demanding room heating and cooling systems as an extension controller (it is possible to link several controllers into a complex system with a BUS connection) 
For controlling simpler heating systems with one mixing circuit 
No. of preset hydraulic schemes2
No. of room units1
No. of mechanical relays1
No. of temperature sensor inputs4
BUS option – the interconnection of AHC controllers and connection with other Seltron heating controllers 
Heating system with radiators 
Floor heating system 
Convector heating system 
Wall and ceiling heating systems 
Mixing heating circuit 
Room heating or cooling according to the time programme 
PARTY function – activation of the comfort operation mode 
ECO function – activation of the economy operation mode 
HOLIDAY function – activation of the operation mode during the holiday season 
BOOST function for intense room heating 
Function for screed drying 
Storage tank overheating protection 
Boiler overheating protection 
Periodic starting up of pumps and mixing valves during a period of inactivity 
Limiting the maximum supply temperature for floor heating 
Graphic display of temperatures according to days of the last week 
Detailed display of temperatures for the current day 
Notifications on the activated protection functions and warnings about system failures 
With a separate dedicated cable, the controller can be connected to a computer 
Connectivity to the SeltronHome platform providing remote control using a smartphone or tablet 
Wizard for an easy and quick device start-up 
11-language user interface
Languages: EN, DE, FR, NL, PL, ES, SL, IT, CS, HR, RU
Connector system for sensor connection 
Setting up the operation by selecting the hydraulic scheme 
“Help” button for quick help with the setup 
Graphically adjustable time programmes 
Adjustment of the mixing valve turning direction 
Logging and display of changes made to the setup 
Option for retrieval of the basic setup in the event of data loss or unwanted changes 
Option of installation onto different types of mixing valves 

OLED graphic display and touch keysyes
Weekly program timeryes
Own consumptionMax. 3.5 W
Energy consumption in the standby modeMax. 0.25 W
Torque6 Nm
Running angle90 < °
Running speed2 min / 90 < °
Operation mode3-point PID
Relay outputs1,5 (1) A ~, 250 V ~
Connection voltage230 V ~ , 50 Hz
Max. Own consumption1,5 VA
Clock power supply3V CR2032 battery (Li–Mn)
Clock accuracy+/- 1 s (24 h) at 20°C
Degree of protectionIP20 acc. to EN 60529
Safety classI acc. to EN 60730-1
Type of temperature sensorsPt1000
Housing materialPC – transparent black
Operating temperature0 ÷ 50 °C
Storage temperature-20 °C to +65 °C
Product weight900 g
No. of pieces in the packaging unit12 pcs
Dimensions (width × length × height) 84 x 101 x 88mm
Electrical connection

  Article - Nr. Products
1AHC40112020-050 1AHC40112020-050 Compact heating controller AHC40, with sensors (1xAF/Pt, 2xTF/Pt)
1TFPTC1MP-000 1TFPTC1MP-000 Submersible temperature sensor TF/Pt, 1 m cord, with a 3.5 mm plug
1TFPTC3MP-000 1TFPTC3MP-000 Submersible temperature sensor TF/Pt, 3 m cord, with a 3.5 mm plug
1AHCAEBUS-000 1AHCAEBUS-000 Set for the BUS connection with another controller
1AHCAECOM-000 1AHCAECOM-000 Cord with a 3.5 mm for the connection of the outdoor sensor and room unit
1RCD2W-050 1RCD2W-050 Digital room unit RCD2, white
1GWD2-040 1GWD2-040 GWD2 Seltron home connection