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Lochinvar nkc199

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wildwillyjohn
wildwillyjohn Posts: 16
in Gas Heating

Installer hooked up circulator direct with WAGO so it runs constantly. I dont see where circulator connects inside to boiler.thought about using taco relay controller externally. Heat and combi hot water works but not correct

Thanks

Comments

  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Posts: 4,852
    Screenshot 2026-09-14 at 11.53.58 AM.png
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • hot_rod
    hot_rod Posts: 28,238

    the combis have an internal circ that is factory wired

    Is it piped primary secondary? A loop pump snd zone pumps may need to be wired

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • wildwillyjohn
    wildwillyjohn Posts: 16

    Schematic shows brown wire no brown in bundle to lower junction box. Purple but no brown.

  • wildwillyjohn
    wildwillyjohn Posts: 16

    The contractor who installed this four years ago venting was two edge, emmanuel says three edge had a natural gas orifice. Its propane. Gasoline was too small for the run from the regulator I had to put a max attrol regulator there to boost the pressure. Gas company came out to do a tune up on it. A 1000 parts per million co should be like 20. My neighbor's an hvac guy. He got it all dialed in for me now. But I just noticed that the circulators running all the time

  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Posts: 4,852
    edited September 14

    You can use the purple (system pump) wire. Do you have only one pump on the heating circuit?

    If the pump is more than 2 amps, you must isolate with a relay.

    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • wildwillyjohn
    wildwillyjohn Posts: 16

    Yes 2 zones one external pump

  • hot_rod
    hot_rod Posts: 28,238

    The way you wire it depends in how it is piped. How many pumps?

    In any case all the pumps should shutdown if there is no heat or DHW call.

    Screenshot 2026-09-14 at 2.01.34 PM.png
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • wildwillyjohn
    wildwillyjohn Posts: 16

    I guess i can call for heat and ck if purple energized. Schematic shows purple going to pump also

  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Posts: 4,852
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Posts: 4,852

    You could just connect the pump and see if it turns on.

    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
    wildwillyjohn

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