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Wiring question

MrBean
MrBean
in General Questions & Topics
Hello,
I'm installing my Tado Wired Smart Thermostat from the starter kit v3+, but am running into issue with the wiring.
The old thermostat is a Henco UFH-THERM24V-W and there are no instructions available in the app. Working with the instructions for the UFH-THERM24V-WD indicates only 2 wires are connected, but mine has 4 connected:
4 - Yellow
2 - Blue (NO according to app for WD)
1 - Red (COM according to app for WD)
A/B - Green

Does anyone know how to correctly wire the cables?
This will work with floor heating and an Intergas Kombi Kompakt HReco 36.

Thank you in advance and let me know if more information is required.

Best Answer

  • GrilledCheese2
    GrilledCheese2 ✭✭✭
    Answer ✓

    4 - Neutral. Not used by Tado. Connect to P1 parking terminal.

    2 - Live. Connect to COM or NO.

    1 - Switched Live. Connect to COM or NO.

    A/B - Clock Wire. Not used by Tado. Connect to P2 parking terminal.

    The clock wire might be used by your UFH controller to activate the setback temperature during the night time. The Tado app can reproduce the setback function by defining a lower temperature in the schedule during the night time.

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