Tado installation with district heating

[Adoppel]

Hi

Please bear with my potentially stupid questions

I've moved apartments and I now have hydronic underfloor heating connected to district heating. I'm interested in replacing the old Danfoss system with Tado. There are all kinds of problems with the wireless thermostats and I want a more smart system. I've spent hours checking guides and videos, but most seem to be for systems with a boiler. As far as I understand, my system has no boiler in that sense, it just has the actuators that turn the flow on or off and the water comes from the district heating. I don't see any wires from the Danfoss controller to anywhere else than the actuators, so I think the water is just "on standby" in the building. There is a Techem sensor bottom right that measures the usage of water as far as I understand and the box above it to the left I presume sends this wirelessly to the water supplier for invoicing.

None of the temperature sensors in the apartment are wired, they are all old wireless Danfoss ones.

I have the possibility to purchase Tado hardware from a friend who works at an electronics store, so I can get the radiator thermostats and wireless sensors quite cheap.

My question is, can I do this?

• Replace the 5 actuators with 5 Tado actuators.
• Purchase 4 Tado wireless temperature sensors.
• Have 1 wireless temperature sensor override 2 of the Tado actuators (living room).
• Have 3 wireless temperature sensors override the 3 other Tado actuators.

So with this setup I don't need the Danfoss controller and can just control each zone with the Tado actuator that again is overriden by the Tado wireless temperature sensor (since the Tado actuator can't measure the temperature in the manifold, but needs to get the correct temperature from each room). Is this possible? I know there probably is some way to wire the system so that I can use the actuators on the manifold already, but I don't think I can use the Danfoss controller with this and I also suspect one or more actuators are broken. So maybe a bit more expensive with 5 Tado actuators and Tado wireless sensors overriding, but right now the issue is more time than costs since I can the the hardware fairly reasonable.

If the setup I'm thinking of is not possible, are there any other ways to make this work?

(I know the flow meters need to be cleaned, the previous owner obviously never did that).

Thank you so much for helping a newbie

 

[Swwils]

The tado units are meant to be used as TRV, not sure if they will have enough power to actuate that distributor.

Tados own suggested setup is to wire the other brand actuators to a smart thermostat.

If you can check that somehow the TRV would work, then yes you can configure the system to do what you want. But you will eat batteries like never before.

I've never seen more than 3 smart thermostats linked to a single tado bridge though - there may be a limit imposed. I know you can only do 6 controled devices per room.

Otherwise all the configuration can be done in the app.

You probably also want to check that the tado TRV actually fully close when "off" I have a feeling that they do not and they rely on the call for heat being turned off to actually stop fully heating - which means your plan might not work.

 

[rbranco]

The tado units are meant to be used as TRV, not sure if they will have enough power to actuate that distributor.

Tados own suggested setup is to wire the other brand actuators to a smart thermostat.

If you can check that somehow the TRV would work, then yes you can configure the system to do what you want. But you will eat batteries like never before.

I've never seen more than 3 smart thermostats linked to a single tado bridge though - there may be a limit imposed. I know you can only do 6 controled devices per room.

Otherwise all the configuration can be done in the app.

You probably also want to check that the tado TRV actually fully close when "off" I have a feeling that they do not and they rely on the call for heat being turned off to actually stop fully heating - which means your plan might not work.

I thought actuation was done with a wax motor even on radiator TRVs, zone actuators on UFH systems are also wax motors.

 

[Swwils]

I thought actuation was done with a wax motor even on radiator TRVs, zone actuators on UFH systems are also wax motors.

Sometimes they got bigger ones, or other styles that the tado won't be able to do.