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New Boiler Timer

Discussion in 'Plumbing and Central Heating' started by copernicus, 28 Apr 2011.

  1. copernicus

    copernicus

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    I have replaced my EP2002 timer with an EP200. The EP2002 backplate had 5 connections with terminals 1 and 5 linked. Yellow and Red wires on terminals 3 & 4 respectively (nothing on terminal 2).

    The new timer only has 4 connections where the yellow wire goes to terminal 4 for CH and the red wire goes to terminal 3 for HW.

    Do I need to link any of the terminals as I think that the HW is by passing the motorised valve and causing the radiators to get warm.

    Any ideas on this???
     
  2. Whitespirit66

    Whitespirit66

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    Are you saying that you have replaced the Potterton EP2002 with a Salus EP200?

    What system have you got, is it fully pumped with 3 port valve?
     
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  4. copernicus

    copernicus

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    Yes, replaced the ep2002 for an ep200. Fully pumped system but maybe two port valve. Is there a difference on the wiring?
     
  5. MrGassafe2011

    MrGassafe2011

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    See below :

    N = Neutral
    L = Live
    1 = HW OFF
    2 = CH OFF
    3 = HW ON
    4 = CH ON
    E = Earth

    Hope this helps !
     
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