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replacing honeywell cm67 with a wireless honeywell cm927

Discussion in 'Plumbing and Central Heating' started by pt1188, 1 Apr 2013.

  1. pt1188

    pt1188

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    My present thermostat Honeywell cm67 has 2 wires live and neutral. I want to replace it with a wireless one and wonder if I can just use the 2 existing wires to wire up the cm927 relay switch. I've looked at the wiring diagram for the relay switch but don't quite understand it. Do I just wire the brown to the L terminal and the blue to the N terminal? Mine is a standard non Combi boiler. Any help much appreciated.
     
  2. Dan Robinson

    Dan Robinson

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    Oh God - another one.

    The two wires are not L and N - they are both switching lives.

    Just wire the new BDR90 box in next to the boiler/heating wiring centre and leave the old wires made safe.
     
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  4. pt1188

    pt1188

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    Thanks genius.

    From us lesser mortals
     
  5. Dan Robinson

    Dan Robinson

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