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Help needed! Drayton Combistat to Honeywell DT90E wiring

Discussion in 'Plumbing and Central Heating' started by froxfield, 20 Oct 2011.

  1. froxfield


    14 Sep 2011
    Thanks Received:
    United Kingdom
    Hello please can any one help?

    I have a Drayton RTS8? Combi-stat , the current wiring is:

    red to 'L' connection
    Blue(with small little red sleeve at the end) to 3 connection

    The earth is also connected.

    I want to swap it to a digital Honeywell DT90E
    The DT90E has A B C connectors

    Could some one let me know if I am correct in thinking that the red one in L at the moment on the combistat should go to A ? and the blue should go to B or should the earth lead be used - what happens to it?

    Here is the Drayton wiring...

    Thank you
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