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Please help connect thermostat to navien combi boiler

Leon86ka
Leon86ka Member Posts: 2
in Gas Heating

Hi all,

Plumber installed navien ncb-h 240-110h combi boiler and I’m trying to figure out how to connect taco 007e pump to combi boiler and connect ecobee thermostat essential so I can turn on the baseboard heating. I don’t have any split zones, it’s just one pump that circulates around a small house. I also have nest thermostat, but reading online that it is difficult to connect two together, but people say ecobee is much easier. Please help me to figure it out.

IMG_9368.jpeg

Comments

  • 109A_5
    109A_5 Member Posts: 2,821

    Lost the install manual already? That's not good. There are on-line copies.

    https://www.navieninc.com/products/ncb-240-110h/downloads

    There are also wiring diagrams in the Appendix

    Page 43. Thermostat all three wires (Ecobee or NEST) I would probably use Zone 1.

    image.png

    Page 43. Circulator

    image.png

    Has this all been done ?

    image.png
    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
    HVACNUTLeon86ka
  • HVACNUT
    HVACNUT Member Posts: 7,016

    Yes, its as easy as turning pages.

    Screenshot_20251006_055456_Samsung Notes.jpg
  • Leon86ka
    Leon86ka Member Posts: 2

    thanks for the confirmation, I have the manual, just wanted to hear from the pros that this is what I was thinking on how to connect the wires to prevent any issues.

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