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Tado X wireless receiver connection with Honeywell VC4013 two way valve

aamer
aamer ✭
in General Questions & Topics
I want to connect Tado X wireless receiver to a zone valve - Honeywell VC4013. This is a two way valve. The wireless receiver will open/ close this valve on demand from the Tado X wireless room thermostat. Can someone guide on the connections from the VC4013 to the Tado X receiver. Should the sensor wires of VC4013 be connected to COM and NO on the Tado X receiver.
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Answers

  • policywonk
    policywonk ✭✭✭

    This link Central Heating Controls and Zoning - DIYWiki - has all the wiring diagrams you need to understand. Scroll down to the S plans and you'll see this:

    image.png

    Now. The first task is to understand the logic. Look at the point where it refers to a ROOM STAT. This is supplied

    • N(eutral) - which goes to N(eutral) on the Tado WIRED STAT.
    • COM on the thermostat (PIN1) receives SWITCHED LIVE which is wired to COM on the Tado WIRED STAT.
    • PIN 3 on the thermostsat in the diagram is actually the pin that powers the motorised valve. This is wired into CH NO on the Tado wired thermostat.

    It is inappropriate to power the motorised valve directly from the wireless receiver according to UK wiring guidance. Normally a home with two port valves would have a wiring centre (represented by the "chocolate block" connector strip identified in the diagram). The motorised valve should receive its power through the wiring centre, from PIN 2 (supplying Neutral), PIN 4 (supplying switched live from the wireless receiver) and PIN 5 (which relays the authority to provide heat to the motorised valve on its brown wire).

    This may take 45 mins to work through the logic, with a mains testing screwdriver, to make sure you are sure about what you need to do. If you are still worried, or what you find is inconsistent with this picture, suggest you involve an electrician.

    Alternatively, describe what you presently have:

    1. The exact model of boiler.
    2. The precise model of timeswitch you have.
    3. The precise model of wall thermostat you have.

    Using that information we can help you to switch things over. By the way - did you ask Tado support directly for the guides to complete the swap? Thats what they are there to do. This is a community of users who help other users. We arent part of Tado.

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