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Tado X Heat Pump Optimiser Nest Thermostat replacement

abbottcam
abbottcam ✭
in General Questions & Topics

Hello

Tado X is soon to be released in the UK. I have a Daikin Altherma 3 HHT, which is control by a Nest. The Nest, controls the heat pump via a contactor, which also controls the radiator pump. Ive attached a very basic drawing of the wiring. I want to connect A1 A2 of the contactor to the Hydro box, but where should I connect it. ChatGPT says 34 and 35 on X2M block…

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Answers

  • policywonk
    policywonk Volunteer Moderator

    Best to contact Tado support directly - support@tado.com. This seems to be a link to the installation guide for your heat pump: Installer reference guide- if you agree, make sure they have that.

    Am sorry, have studied their install guide and it is unclear what they mean by digital controls; the protocols arent declared, and on pages 10-12 it seems that they operate in relay mode - although that is still not clear because the language used suggests that the main control panel actually delegates the switching authority, hence it seems to be digital. This is one for Support to handle.

    Come back, let us know if they gave you anything useful. Others will benefit.

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