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Discuss Heating timer replacement in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. Link65
    Offline

    Link65 EF Member

    Location:
    Birmingham
    I'm trying to replace an old Landys and Gyr RWB2 heating & hot water timer with a Horstmann 425 Tiara.

    I'm just a bit perplexed as to the wiring - I've looked and the wiring diagram for the old timer and tried to convert it to the new 'tiara' timer.

    But it looks totally wrong.

    Can someone have a look and see if they can spot what I've done wrong? Heating timers are not my forte.

    View attachment 20180312_100733.jpg

    tiara.jpg

    Edit: Just for the record, that's not my shoddy wiring.
     
    Last edited: Mar 12, 2018
  2. Murdoch
    Offline

    Murdoch Electrician's Arms

    Location:
    Woking
    Oh dear .............
     
  3. Link65
    Offline

    Link65 EF Member

    Location:
    Birmingham
    I'm not sure where you're going with that xD
     
  4. Matthewd29
    Online

    Matthewd29 Regular EF Member

    Location:
    Belfast
    That is truly horrendous, earth as a live cable and identification
     
  5. Link65
    Offline

    Link65 EF Member

    Location:
    Birmingham
    Yeah, I didn't install this. but it's making identification difficult at best.
     
  6. Matthewd29
    Online

    Matthewd29 Regular EF Member

    Location:
    Belfast
    Too right it does, have you a pic of the wiring diagram on back of original timeclock
     
  7. Link65
    Offline

    Link65 EF Member

    Location:
    Birmingham
    Here's the original clock should be the same diagram as the upload on the first post.

    20180312_133013.jpg
     
  8. Pete999
    Online

    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    I see the cpchas been used as a control conductor, not a good idea.
     
  9. Pete999
    Online

    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    You would be better advised to get an Electrician in to sort the cable out and connect the controller up for you, advising someone via email and pictures is not a good idea really.
     
  10. Link65
    Offline

    Link65 EF Member

    Location:
    Birmingham
    No problemo

    Thanks for having a look :)
     
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