Vaillant e242 no power

Discussion in 'Electricians' Talk' started by Lapot, Jan 10, 2016.

  1. Lapot

    Lapot Member

    I m so great full you are helping but this drawings not clear to me. I don't want do something wrong again. Could you explain over the pictures I sent you?
    Many thanks. I really appreciate.
     
  2. Lectrician

    Lectrician Screwfix Select

    To keep your room stat too, put it in series with the Timer 4 and Boiler 4
     
  3. Lectrician

    Lectrician Screwfix Select

    It's exactly as you have laid the back plate out. NL1234. That's what I have posted.
     
  4. Lapot

    Lapot Member

    That is it ? We don't use NL on boiler and number 1 on timer?
     
  5. Lapot

    Lapot Member

    How about number 3 from room stat?
     
  6. Lectrician

    Lectrician Screwfix Select

    123 would not be used on the timer.

    Follow the diagrams and try to understand why. You're just guessing otherwise. The timer has a hot water time control which is undesirable. It won't be used. You should keep the stat by wiring it in series as above. It will be fed from timer, not from boiler.
     
  7. Lectrician

    Lectrician Screwfix Select

    If I was on a computer I would draw it. I'm on a pad.
     
  8. Lapot

    Lapot Member

    What is the difference between c27 and c17
     
  9. Lapot

    Lapot Member

    You have been great help so far. I will try to understand what you put so far and then I would do the connections
     
  10. Lectrician

    Lectrician Screwfix Select

    It has time control and terminals for just heating, not hot water. You have a combi boiler, so no need to control hot water times.
     
  11. Lapot

    Lapot Member

    I guess we need hot water all the time so I wouldn't mind hot water all the time.
     
  12. peter palmer

    peter palmer Super Member

    Thats a strange diagram, they want you to pinch a feed from the L&N terminals for the time clock electrics but take a permanent live feed from 3 for the switch contact in the timer and then take the neutral for the thermostat to 5.

    Why not just show everything connected to 34&5.
     
  13. Lapot

    Lapot Member

    I have drawn what you suggested but I m stuck with room stat. Where it goes the cables were 3/4 before? image.jpg
     
  14. Lapot

    Lapot Member

    You think I should keep the 3 in the same place as before and 4 with timer?
     
  15. Lectrician

    Lectrician Screwfix Select

  16. Lapot

    Lapot Member

    It can't be clear than this I guess.you are a diamond.
     
  17. Lectrician

    Lectrician Screwfix Select

  18. Lectrician

    Lectrician Screwfix Select

  19. Lapot

    Lapot Member

    To be honest this is what I wanted first place and I got myself in this mess. This link product you put above ,is it replacing the room stat button? I might give this c27 back and get the one in the link. Is it easy to install?
     
  20. Lectrician

    Lectrician Screwfix Select

    Two wires. You can't go wrong :eek:
     

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