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I would like to hook up my hrv to my ecobee 3. I've got 3 wires going to the hrv controller, R G B, and the manual lists Y G B, there is an alternate interlocking listed which maybe what's going on. From what I can tell the R wire goes to Acc+ and then I get lost. I think either G or B is capped off but I'm not sure which. All of this wiring has my head spinning.
Venmar Constructo 1.5 HRV
Ecobee Furnace installation wires
Rc W Y G C