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Replacing Honeywell ST9100a with Hive

Discussion in 'Plumbing and Central Heating' started by Luke Southgate, 28 Sep 2021.

  1. Luke Southgate

    Luke Southgate

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    Hi everyone,

    We are just in the process of a kitchen refit and have purchased a hive (single channel).

    Having removed the face place for the existing programmer (Honeywell ST9100a) I have noticed more wiring than I had expected, for example multiple cables in Earth, Live and Neutral.

    Looking at the wiring diagram I was under the impression that when fitting the hive I would just need to reposition the wiring as the below, however the extra wires has thrown me off a bit.

    Earth -> Earth
    N -> N
    L -> L
    1 -> 1
    4 -> 3

    There is also an existing thermostat which I intend to leave on full for the moment.

    Has anyone got any thoughts?

    Cheers,
    Luke
     

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    Last edited: 28 Sep 2021
  2. CBW

    CBW

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    Transfer all wires the same, but slight difference as follows:

    L to L
    N to N
    Earth’s to Earth’s
    1 to Common (1)
    4 to 3 heating on

    That’s it.
     
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  4. ianmcd

    ianmcd

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    The wires in 1&4 on the existing now go to 1&3 on the hive, you might find that the L&N as they are doubled , will be difficult to fit in the Hive terminals, , as the hive terminals are very tight, if that is the case use terminal strip , and extend single wires to the L&N, you can put the earths in the terminal strip too if you want as the hive doesnt need an earth
     
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  5. Luke Southgate

    Luke Southgate

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    Perfect thanks, good to know it's nothing to worry about and that I was along the right lines.
     
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