Relay box Heating & Cooling District heating

Switch a heating and a cooling contact

This Relay box is powered by 230V and a 5V USB power supply. The Relay box is switched by a plug and an Adam HA. In combination with a plug, Adam HA, Cooling feature and a thermostat, you can then switch any heating and cooling contact of 0-230V district heating valves based on the heat or cooling demand. This Relay box is suitable for valves that require permanent power supply, such as Belimo valves.

Note: You may need one of the optional accessories.


Relay box Heating & Cooling District heating149,00
  • Free shipping from €100 (NL) or €150 (BE)
  • Ordered before 12:00 on working days, delivered tomorrow
    (when in stock)
  • 2 weeks to change your mind


What is it?

This Relay box is suitable for district heating with heating and cooling valves that have an on/off contact and that also require constant power. An example is a Belimo valve actuator that has an N and L lead with a second L lead that switches.

If Adam has a demand then Adam’s question contact will close. The plug then determines whether this demand is for heating or cooling. When there is a demand for heat, the heat contact will eventually close. When cooling, the cooling contact will eventually close. If there is no heat or cooling demand, both contacts are open and both valves are closed.

Please note, does your district heating have a demand contact and a heating/cooling contact? Then only use a plug with a 230V relay box. Connect the plug with the 230V Relay box to the heating/cooling contact and set it as the appliance type cooling contact and connect Adam to the demand contact.


  • 1x Relay box with cables up to 1m
  • 1x Relay box diagram


What do you need?

  • 1x Adam HA
  • 1x Thermostat
  • 1x Plug / Aqara Plug
  • 3x Free sockets
  • 1x Cool feature


Enter an ID

Do you also choose the Cool feature? Then enter the ID of your Adam HA if you already have one. The ID consists of 8 letters and is located on the bottom of the gateway. You can also find the ID in the app.