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Electrical Problem wiring

Discussion in 'Plumbing and Central Heating' started by ZiderIup, 10 Sep 2010.

  1. ZiderIup


    10 Sep 2010
    Thanks Received:
    United Kingdom
    Hi All,
    Can anyone help with what wires I should connect to a new Horstmann Channel plus H27XL.

    I have a gravity HW and Pumped CH system with room stat (no cylinder stat)

    Here is the existing timer Horstmann Diamond

    Here is the existing wiring

    what wires control what and have had a go at replacing

    I have the installation instructions here but cannot work out what goes where exept for the L,N and E and I can see that I need to link L 2 & 5 which I have done. I have also removed the gravity link.

    I have DHW going to 1
    Room stat (yellow) going to 4
    CH pump (Red) going to 5
    CH Pump (Yellow) ? this is where I have a problem can not work out where to put this wire.


    All fixed CH PUMP (Red) TO 4
    joined 2 yellows together
    Thanks to holmslow on the Electrical forum

    Any help will be most appreciated
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