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Thread: Port Nest heat link wiring to BDR91

  1. #1
    Automated Home Jr Member
    Join Date
    Nov 2020
    Posts
    27

    Default Port Nest heat link wiring to BDR91

    I have installed at the moment Nest Heat link but I'm going to remove in favour of the wireless relay BDR91. I have a combi boiler.

    The heat link wiring at the moment looks like this

    AFF48D48-3351-4344-A21A-4F74EBD61B05.jpg


    Simply I have in the heat link N & L and then the switch. There is also the ground to the left but we can ignore in this specific case

    What I do not understand is why the BDR91 has two L instead Nest has only one port for the L.

    According my understanding of the diagram for the combi boiler I need to connect the L of the Heat Link to the first L to the right of the BDR91 and then make a bridge as reported between the first L to the right and the second L In the middle.

    Is it right?

  2. #2
    Automated Home Sr Member philchillbill's Avatar
    Join Date
    Jan 2017
    Location
    Eindhoven, Holland
    Posts
    95

    Default

    See this video for an explanation. The 2nd L terminal is just for if you need to switch a 230V device instead of a 24V one.

    https://youtu.be/cahyjrrFl9c

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