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Sonoff emersion wiring

  • 04-04-2020 3:30pm
    #1
    thelibertyboy
    Registered Users, Registered Users 2 Posts: 310 ✭✭


    Hi I have a sonoff th16 with temp sensor my emersion has E,N,L(Black),L(Brown)

    I have the wiring in and out in th16 and I'm using connector from the wires out to connect the emersion wires. theres only one live connector wondering should I intertwine the black and brown or only bridge the brown to brown on the connector?

    Thanks


Comments

  • #2
    Bruthal
    Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    thelibertyboy wrote: »
    Hi I have a sonoff th16 with temp sensor my emersion has E,N,L(Black),L(Brown)

    I have the wiring in and out in th16 and I'm using connector from the wires out to connect the emersion wires. theres only one live connector wondering should I intertwine the black and brown or only bridge the brown to brown on the connector?

    Thanks

    I would have kept the immersion switch in the setup.

    So supply switched off, and L and N supply into TH16.
    Out of it into immersion switch.

    That way you just leave the immersion switch on, and at bath or sink. Sonoff then switches on and off what you have selected.

    If you do go with just the sonoff, you leave out the sink wire, just have the bath one on it. You certainly do not want both on at a time.


  • #3
    banie01
    Registered Users, Registered Users 2 Posts: 17,301 ✭✭✭✭banie01


    Bruthal is spot on here.
    Easiest way to do it is wire the Sonoff in before the immersion.

    Leave switch in place set to on/bath and Sonoff to handle actual on/off.


  • #4
    thelibertyboy
    Registered Users, Registered Users 2 Posts: 310 ✭✭thelibertyboy


    Ah right so if I had of put them together it would blow the immersion?

    Thank you!!


  • #5
    Bruthal
    Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    thelibertyboy wrote: »
    Ah right so if I had of put them together it would blow the immersion?

    Thank you!!
    No wouldnt blow the immersion itself.

    Bath takes 13 amps, sink 9, both together 22 amps. Its a 20 amp circuit.

    Also risk overheating the top of the immersion unit. Both on together is not good.


  • #6
    onetime12
    Registered Users, Registered Users 2 Posts: 6 ✭onetime12


    Bruthal wrote: »
    No wouldnt blow the immersion itself.

    Bath takes 13 amps, sink 9, both together 22 amps. Its a 20 amp circuit.

    Also risk overheating the top of the immersion unit. Both on together is not good.

    I did this a month or so ago.....

    so the immersion is no longer heating up the water.

    lucky our heating does this.

    would i need to fully replace the immersion or the board?


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  • #7
    Lwaker.
    Closed Accounts Posts: 65 ✭✭Lwaker.


    onetime12 wrote: »
    I did this a month or so ago.....

    so the immersion is no longer heating up the water.

    lucky our heating does this.

    would i need to fully replace the immersion or the board?

    Could be the heater or the sonoff ,did u replace the immersion switch

    The immersion switch does functional switching ( control)l+ local isolation, so shouldn't be replaced


  • #8
    onetime12
    Registered Users, Registered Users 2 Posts: 6 ✭onetime12


    Lwaker. wrote: »
    Could be the heater or the sonoff ,did u replace the immersion switch

    The immersion switch does functional switching ( control)l+ local isolation, so shouldn't be replaced

    The immersion switch is gone iv ordered an exact one shud be here soon i was wondering usually the black wire is sink and brown is bath am i right in saying that??


  • #9
    Lwaker.
    Closed Accounts Posts: 65 ✭✭Lwaker.


    onetime12 wrote: »
    The immersion switch is gone iv ordered an exact one shud be here soon i was wondering usually the black wire is sink and brown is bath am i right in saying that??

    Usually

    You have to test if it's not labelled or you're fitting the heater and can see the sink bath

    There's been s few variations on the immersion heater wiring


  • #10
    Bruthal
    Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    Yes the blue was once one of the element feeds.

    That can be dodgy, as it is possible to connect an immersion incorrectly, such that the stat is bypassed when one element is selected on the bath sink switch.


  • #11
    onetime12
    Registered Users, Registered Users 2 Posts: 6 ✭onetime12


    Lwaker. wrote: »
    Usually

    You have to test if it's not labelled or you're fitting the heater and can see the sink bath

    There's been s few variations on the immersion heater wiring
    Yeah i just took off the immersion cap brown is bath and i wired it up to a 13 amp plug still no movement balls 🀨


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  • #12
    Lwaker.
    Closed Accounts Posts: 65 ✭✭Lwaker.


    Bruthal wrote: »
    Yes the blue was once one of the element feeds.

    That can be dodgy, as it is possible to connect an immersion incorrectly, such that the stat is bypassed when one element is selected on the bath sink switch.
    The blue feed is going back a bit

    The brown and black were also sometimes different on newer heaters

    The new controllers are more trouble than they're worth with Immersions


  • #13
    Bruthal
    Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    Lwaker. wrote: »
    The blue feed is going back a bit

    Yes must be back in the 80s. I remember them anyway.


  • #14
    onetime12
    Registered Users, Registered Users 2 Posts: 6 ✭onetime12


    Lwaker. wrote: »
    The blue feed is going back a bit

    The brown and black were also sometimes different on newer heaters

    The new controllers are more trouble than they're worth with Immersions
    Think im just going to have to get the immersion replaced


  • #15
    Bruthal
    Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    Some immersions have an overheat cutout in them which can be reset.

    Also the stat could be the problem. Quick tests can show what the problem is, by someone experienced in such matters.


  • #16
    whizbang
    Registered Users, Registered Users 2 Posts: 1,974 ✭✭✭whizbang


    I would be wary of a Sonoff on anything more than about 5A. I just dont think they are up to the job.


  • #17
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,641 Mod ✭✭✭✭2011


    whizbang wrote: »
    I would be wary of a Sonoff on anything more than about 5A. I just dont think they are up to the job.

    I understand your concern. Obviously you can get a Sonoff to switch a contactor, that way the current flowing through the Sonoff can be reduced to <0.5 amps when switching a 3 kW immersion.


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