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Seimens RWB7 Timer wired incorrectly

Discussion in 'Plumbing and Central Heating' started by vinny048, 12 Dec 2007.

  1. vinny048

    vinny048

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    Having probs with this timer, CH only works by control of roomstat making the timer useless.

    Had a look at it earlier, I can see the connections to it, as follows;

    Live
    Neutral
    &
    a cable connected to '2' and '4', I chased the cables connected to '2' and '4' back, when I found the end of the run they were both connected together in a connection block.

    there is nothing connected to '1' and '3'

    I don't believe this is correct, can anyone help?

    Thanks
    Vinny
     
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  3. ChrisR

    ChrisR

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    The timer instructions are on their website, and if you tell us what motorised valves etc you have we can point you to an overall connection diagram.
     
  4. vinny048

    vinny048

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    not too sure what motorised valves, all I can tell you its a baxi 105e combi....if thats any help.
     
  5. namsag

    namsag

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    From your description this clock is not connected to the boiler as the wires from 2/4 should go to room stat and onto connections 1an2 on boiler terminal strip.. If you have boiler installation instructions there is a picture and wiring diagram
     
  6. vinny048

    vinny048

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    Cheers namsag, i can see the roomstat has 2 terminals connected, yellow to terminal 1 and red to terminal 3, i take it these these terminals need to be linked together.

    Only prob is my timer is in the kitchen and the cables from terminal 2/4 are terminated upstairs in the airing cupboard, could I do any damage to my boiler if I connect them the wrong way around?
     
  7. namsag

    namsag

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    No they don`t link this is done by internal switching when heat req.. Start from scratch.

    This is wiring for heating
    Its one big live loop with power being supplied by the boiler
    wire out of terminal 1 in boiler goes to terminal 2 on clock out of clock on terminal 4 to terminal 1 of room stat out of terminal 3 of roomstat to terminal 2 of boiler.

    Boiler and clock also have LNE which is a seperate circuit to this
     
  8. vinny048

    vinny048

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    yeah i see what you mean now, just looking at ther wiring diagram.

    Thanks for your help namsag
     
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