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  1. Kurt in Seattle

    Navien NCB-240 & common wire

    Here's a photo of the thermostat wiring panel at the Navien.
  2. Kurt in Seattle

    Navien NCB-240 & common wire

    Same exact issue as Chialex here. Issue is that the Navien NCB-240 doesn't have the standard thermostat wiring connection labels. It has A/H (2); T/T (2); LWCO (2) AC24V output (3). I have wires into both slots at T/T. and then a jumper between the two LWCO slots. Installing a Nest eThermostat...
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