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Honeywell BDR91 to hive

Discussion in 'Plumbing and Central Heating' started by Abdul Ahad, 27 Nov 2019.

  1. Abdul Ahad

    Abdul Ahad

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    Hello,

    Looking to upgrade thermostat. I have a valliant combi boiler and it has honeywell BDR91 installed with CM927 . Please see the picture of the wiring.

    Can someone guide me which Hive to buy from amazon as there are so many options and how to connect the wires.

    Thanks
     

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  3. stem

    stem

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    As you don't mention any hot water control, I assume the BDR91 is connected to a combi boiler, and that you don't have a hot water cylinder. If that's right you require the Single Channel Version of the Hive, and it connects as follows:

    Blue now in N to Hive N
    Brown now in L to Hive L
    Black wire now in A = Hive Heating on 3
    Use the link wire to join Hive L to Hive Com 1
     
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  4. Abdul Ahad

    Abdul Ahad

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    Thanks a lot.
     
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