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Hive wiring

Discussion in 'Electrics UK' started by google, 11 Aug 2019.

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  1. google

    google

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    Hi everyone
    I have installed new worcester 18ri heat only boiler with 2 zone valves and I have never installed have thermostat before.

    Thanks
     
    Last edited: 11 Aug 2019
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  3. flameport

    flameport

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    What was the question?
     
  4. google

    google

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    I need the wiring diagram for hive
     
  5. DetlefSchmitz

    DetlefSchmitz

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    If it wasn't supplied with the product, I would wonder why you bought it. A lot of people seem to come onto this site and ask what to do with the Hive or other weird over-technical 'solution' they were just forced to buy.
     
  6. ericmark

    ericmark

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    I do see the problem.
    With Hive or any other Smart thermostat zones are made with the TRV heads rather than with zone valves.

    If using a non modulating boiler however then you can use a standard S plan, the two Hive thermostats can work the two zone valves which in turn run the boiler.

    Using a modulating boiler you remove or combine the motorised valves as not really required, well not required with non modulating really, the TRV heads are programmed to produce not just two zones but a zone for every room.

    However the down side is the cost of Hive TRV heads, at £80 a pop, it gets rather expensive, and since Hive is not Opentherm where Tado and EvoHome is, Hive may not be best selection.

    Worcester Bosch is also a problem. It does not support OpenTherm. As far as I am aware Worcester Bosch uses Wave, this is also a problem as it only works in one room, rather a silly selection in anything but a open plan house.

    However you can only **** with the **** you have, so in some way you need to botch it up to work.

    So question is why Hive? The normal reason for a thermostat with a modulating boiler is to turn off the boiler to stop it cycling, but Hive is normally used to allow remote control, so if that is the case, how with zone valves you are going to use one Hive thermostat I don't know?

    I would say it is a case of pricing up the alternatives, so if looking at 2 up and 2 down £100 for Hive fitting a second hive will cost £100 and fitting Hive TRV heads will cost £320 and as you increase rooms so the price goes up, but Hive wall thermostat and Hive TRV heads is how it should be done, so what are you intending?

    Lucky I selected Nest, the wall thermostat is more expensive, but the TRV heads (Energenie) are cheaper.

    The other option is to cheat, you can get TRV electronic heads for £10, with Bluetooth still only £15 each, and if programmed the same as the wall thermostat then it would work, but then can't use the remote feature of Hive.

    The wiring diagram easy [​IMG] but how your going to use it is another question.
     
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  8. stem

    stem

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    I take that to mean that you are referring to a system with one 2-port motorised valve for the hot water and another for the central heating. Aka 'S-Plan'.

    By your use of the Gas Safe logo I will assume that you are already familiar with a standard 'S-Plan' installation. (S-Plan requires the Dual Channel version of Hive)

    Hive.JPG

    The Hive simply is installed in place of the standard programmer (you will see that the terminals are marked the same). The only wiring difference is that you don't need to fit a wired room thermostat so Hive Terminal 4 Heating on (NO) connects directly to the live wire of the central heating motorised valve instead. Everything else remains exactly as a standard S-Plan.
     
  9. ericmark

    ericmark

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    If heat only I assume that means only central heating no DHW can one use a duel channel hive thermostats for the two channels? I would have expected it would need two single channel hive thermostats not one duel? I expect one could add a second non hive thermostat instead of the tank stat? but that does seem to defeat the whole idea. I would have thought you would remove zone valves and add electronic TRV heads, but at £80 each that gets a tad expensive.
     
  10. stem

    stem

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    Can't say I have seen any 'heat only' boilers supplying a two zone central heating system, without a hot water system also connected. Combi's yes, because they supply hot water directly to the taps, but not heat only boilers. I guess they do exist, perhaps in commercial properties without bathrooms. If this is what the OP is describing he will be 'one in a thousand'

    Having said that the OP' just states he has a 'heat only' boiler and 'two zone valves' only he can say what each valve is connected to.
     
  11. ericmark

    ericmark

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    It would seem I have misunderstood "'heat only' boiler" I assumed like my old house one boiler the Main 7 did domestic hot water, and the other boiler did central heating only, today often both boilers combined together and called a combi, but my old house set up early 1980's so two independent boilers.
     
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