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Glow-Worm Ultimate2 30C and the Hive Receiver wiring.

Discussion in 'Plumbing and Central Heating' started by Billbo45, 1 Dec 2020.

  1. Billbo45

    Billbo45

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    Hi all
    I have a Glow-Worm Ultimate 30c combi boiler and there are only two wires to the room thermostat.
    I am about to wire in a Hive Receiver which shows it needs four wires.
    I am pretty sure the existing wires are simply for ON/OFF and use 24v.
    And the Receiver needs 240v to power it.
    Am I right in assuming that the wires to the Receiver are as follows...

    N- Permanent 240v Neutral connection.
    L- Permanent 240v Live Connection.
    1- Common, unused.
    2- Heating OFF so one of the two existing wires from the existing thermostat.
    3- Heating ON the remaining of the two existing wires from the existing thermostat.


    Or... are terminal 1, the common and terminal 3, heating ON the two I use for the existing thermostat wires?

    Any help would be appreciated.
     
  2. stem

    stem

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    Second guess is correct. (y) You want 'common' and 'heating on' as the thermostat switch wires. Terminals 1 and 3.

    The heating off terminal becomes live when the heating erm... goes off so you won't want that!
     
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  4. Billbo45

    Billbo45

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    Thanks Stem.
    Ill let you know how it goes tomorrow.
     
  5. ianmcd

    ianmcd

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    Do not link L&1 as advised in some other posts ,you dont need it and if you do actually have 24v switching you will damage the boiler PCB
     
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