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Navien NCB-180E

JCPHNY Member Posts: 1
edited December 2019 in Radiant Heating
Why does Navien forbid connecting 120 power to external circulator ? Draw on taco pump is .7 amps. Navien external power is 1.3 amps !


  • motoguy128
    motoguy128 Member Posts: 394
    Inrush coil trip the internal breaker then you have no heat or dhw.

    That being said I recall us wiring up a small 3 speed pump running on low speed.

    But best to spend the $50 on a switching relay And do it right to avoid issues.