Recent content by journeyon

  1. J

    Connecting Honeywell CMT927 Thermostat to Vaillant Turbomax

    Firstly, I want to say how incredibly useful I have found this forum in the short time I've been using it - I'm indebted to folk like D Hailsham who have gone to incredible lengths to assist me in such a willing way! For those who are interested, I have to say that I think the Honeywell...
  2. J

    Connecting Honeywell CMT927 Thermostat to Vaillant Turbomax

    I've now got the thermostat connected and programmed. I'm really impressed by its functionality and ease of use, and it seems to be keeping the temperature at or near the required settings but some rather peculiar things (to my mind at least) are happening: 1. When the thermostat sends a...
  3. J

    Connecting Honeywell CMT927 Thermostat to Vaillant Turbomax

    Thanks for the input Chris - I connected it up and it works a treat! You ask whether I wired the junction box after the FCU. Let me tell you what I've done just to be sure we're on the same wavelength: The main supply goes into the switched box containing the fuse. I've taken a lead from this...
  4. J

    Connecting Honeywell CMT927 Thermostat to Vaillant Turbomax

    Many thanks for the feedback! Thanks too for pointing out that I should use B and not C as I incorrectly stated. I still have a problem understanding why there is power going from the boiler to the receiver, given that the receiver already gets power from the mains connection. Are you saying...
  5. J

    Connecting Honeywell CMT927 Thermostat to Vaillant Turbomax

    My daughter's flat has a Vaillant Turbomax Plus 828E combi boiler. I want to connect a Honeywell CMT927 Programmable wireless thermostat. The installation instructions for the thermostat's receiver show that the "N" and "L" connections on the receiver must be connected to a power supply, and...
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