1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Honeywell st699

Discussion in 'Trade Talk' started by Rbraham, 25 Sep 2018.

  1. Rbraham

    Rbraham

    Joined:
    25 Sep 2018
    Messages:
    4
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi

    I am studying to become a service and breakdown engineer and I came across a Honeywell st699 today and was wondering from the picture would anyone be able to tell me which wires are from the heating thermostate.

    Thanks

    upload_2018-9-25_20-49-0.jpeg upload_2018-9-25_20-45-53.jpeg
     
  2. flameport

    flameport

    Joined:
    10 Mar 2007
    Messages:
    8,227
    Thanks Received:
    1,510
    Location:
    Poole, Dorset
    Country:
    United Kingdom
    Without seeing the rest of the system wiring, it's impossible to know.
    It could be none of them - thermostats and all of the other devices are typically connected to a wiring centre, not to the programmer.
     
  3. Rbraham

    Rbraham

    Joined:
    25 Sep 2018
    Messages:
    4
    Thanks Received:
    0
    Country:
    United Kingdom
    Thank you for your reply. Okay is there any way I can work it out from wiring center,

    Will give you a little insight into job the customer has had her walls all RE skimmed and has had the thermostats taken off the wall to do so and plastered straight over the thermostat wiring now can’t get hold of the guy that done it and doesn’t know where it was. Due to being new house.

    Would like to work out how to disconnect it so there isn’t a live redundant cable in the wall. Then install a wireless stat.
     
  4. ericmark

    ericmark

    Joined:
    27 Jan 2008
    Messages:
    14,365
    Thanks Received:
    1,275
    Location:
    Llanfair Caereinion, Nr Welshpool
    Country:
    United Kingdom
    Step one is work out the plan used, W, S, Y etc. then normally the motorised valves have fixed colours so at the wiring centre you can work out what was the old thermostat cables.
     
Loading...
Related Threads
  1. Rbraham
    Replies:
    2
    Views:
    733

Share This Page