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    potterton prt2 to honeywell cm907 wiring help

    Thank you both. Much appreciated
  2. S

    potterton prt2 to honeywell cm907 wiring help

    Hi, Just decided to upgrade but I need help with wiring (not great at DIY!). I currently have a potterton prt2 thermostat wired as follows - What wires go into what in the Honeywell CM907 unit on slot a, b and c! Thank you.
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