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Connect Google power connector to Weil McLain,

Lunatick
Lunatick Member Posts: 2
in Thermostats and Controls
Recently swapped a Google Nest thermostat for one of my old tstats, I tried using an C wire adapter but that failed so I ordered the power connector but now I'm not sure how to connect it. Any help would be appreciated. Here's what I'm looking

Comments

  • HVACNUT
    HVACNUT Member Posts: 6,335
    At the thermostat/DHW terminal block there's a black wire labeled C. Connect that to C on the Nest.
    It doesn't say on the boiler which is R and W so if it doesn't work try swapping R and W.
  • Lunatick
    Lunatick Member Posts: 2
    Then I have to run wire from the C to the tstat and that'll be a whole other task, can I splice the wire from the R on the tstat block and the W from the transformer to the power connector I got with the nest? The power connector has connection for R and W since it's only a heating system
  • HVACNUT
    HVACNUT Member Posts: 6,335
    You need 3 wires. I'm not familiar with Nest's "create a Common" gadgets. I remove Nest's, I don't install them. 

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