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Timeclock cabling identify

  • 26-11-2018 2:37am
    #1
    readymix111
    Registered Users, Registered Users 2 Posts: 45 ✭


    Hi, I have a Vokera Mynute EHE boiler and I want to put a wifi spur in so I can have control from an app. I would need to put this in place of the timeswitch, however there is a cable I'm unsure of what it is doing.
    Connector block terminals
    1) Switched live from clock to boiler?
    2) Unsure?
    3) Live from spur and permanent live to boiler
    4) Neutral from spur and neutral direct to boiler

    On the wifi spur there is L in L out, N in N out.

    I would need to put the 2 cables from terminal 3 into L in
    I would need to put the 2 cables from terminal 4 into N in
    I would need to put the 1 cable (brown) from terminal 1 into L out
    N out terminal would be left empty as the boiler needs direct N to it.

    What is the cable in terminal 2 (black cable) doing?

    Please see attached photos thanks


Comments

  • #2
    Dardania
    Registered Users, Registered Users 2 Posts: 3,612 ✭✭✭Dardania


    Weird to try understand - are the cables in terminal 1 the volt free connection to switch on & off the boiler?

    And 3 & 4 is just the power to power the timeclock?

    It sort of implies that the boiler has a permanent live already from elsewhere...possibly from terminals 3 & 4 as a double up. Also see the way there's no link cable between terminals 2 & 3

    You could test in two stages:
    1- take the switch out and check the continuity between terminals 1 & 2 - if it is closed circuit when the switch is on (and vice versa) then that's how the boiler switches.
    2- repower the boiler (from terminals 3 & 4, and link the wires in 1 & 2 together. Boiler should fire...

    Edit: In context of your WiFi switch, you would then most likely put your cables 1 & 2 to L out & N & out, but maybe just double check the wiring diagram for the WiFi switch to ensure it isn't creating some link with it's L & N in that might erroneously pass 230VAC to a volt free contact


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