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Hydronic heating

joshua2002
joshua2002 Member Posts: 8
in Strictly Steam

I have a lochinvar solution CWN199PM.

The boiler will continuously run even when external thermostat is disconnected from the unit.
Why??

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 25,351

    Good question. Warm start aquastat? Demand from and indirect hot water heater? Short in the wiring? Odd relay wiring? Gremlins?

    We need to know more about how your system is set up and controlled.

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • mattmia2
    mattmia2 Member Posts: 11,233

    Freeze protection?

  • mattmia2
    mattmia2 Member Posts: 11,233
    edited November 2024

    Oh, it is a water tube atmospheric. I'm going to go with set up as warm start.

    It might be some attempt at condensation protection, water tube boilers really don't like flue gas condensation from low return water temp.

    delcrossvold_diy_guy
  • delcrossv
    delcrossv Member Posts: 1,627
    edited November 2024
    https://forum.heatinghelp.com/discussion/comment/1821174#Comment_1821174

    That and it takes a while to heat up 20 gallons of cold water like in older boilers. Mom's house was set up with warm start on her Crane Sunnyday.

    Trying to squeeze the best out of a Weil-McLain JB-5 running a 1912 1 pipe system.
  • pedmec
    pedmec Member Posts: 1,146

    I don't believe its still running or you would trip a high limit, relief valve. what you hear is the pump running. my guess is they wired it directly to 120 volts or the circulator relay is defective. remove the j-box cover and follow the wires

  • mattmia2
    mattmia2 Member Posts: 11,233
    https://forum.heatinghelp.com/discussion/comment/1821177#Comment_1821177

    a water tube boiler has a lot less water content.

    delcrossv

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