Newbie hydronic questions!

Discussion in 'Boiler Forum' started by pbaxter, Mar 26, 2009.

  1. pbaxter

    pbaxter New Member

    Mar 26, 2009
    I've just bought an older house with hydronic baseboard heating. The boiler is only a few years old.

    1 - Is it normal for the circulating pump to run all the time, even when heat is not needed?
    2 - Is it normal to be able to hear the pump running ( the sound seems to be conducted through the pipes)?
    3 - One room's heater doesn't give off any heat. Its valve seems to be open. I've been told to drain it to remove air bubbles - how is this done?


  2. kingsotall

    kingsotall Plunger/TurdPuncher

    Aug 17, 2008
    Hand copper part cleaned ready to go
    Flagstaff, AZ Sitting on an upside down 5 gallon b
    You need a mechanic that is highly skilled in boilers to be maintaining this system. That is the only advice I can safely offer.
  3. Sponsor

    Sponsor Paid Advertisement

  4. msgale

    msgale Member

    Sep 28, 2006
    you can remove air, if that's the case, by opening the air vent located near the topof the radiator, you may need an odd square wrench to open it.

    Open the valve, and have a rag ready, keep it open a s long as you hear the air escape-a few seconds, maybe more.
    as soon as water comes out, turnit off and hope you caught it w the rag.
  5. pbaxter

    pbaxter New Member

    Mar 26, 2009
    Thanks folks.
  6. nhmaster

    nhmaster Master Plumber

    Jul 30, 2008
    Tech. Instructor
    S. Maine
    No, the circulator should only run on a call for heat. No the circulator should not be very loud. probably has a bad coupling, bearing assembly or motor mounts. And removing the air may have to be done at the boiler, from the purge & balance valve.
  7. cattledog

    cattledog New Member

    Jan 29, 2006
    Portland, Oregon
    #1. Depends. Some systems are set up for constant circulation, but you could have a failed relay or some other problem in the controls which has left the pump constantly running. More information required.

    #2. No. Pump could be shot or original installation and vibration isolation could be poor. Noise is subjective and one persons quite could be anothers noisy. System could have been set up noisy from day one if the original owner/installer did not care.

    #3. Bleed the air out. If that does not work then there is something thing else wrong, and you will have to provide more information about your piping arrangements for this forum to help troubleshoot.
  8. Frog1

    Frog1 New Member

    Mar 31, 2009
    Ahhhhhh... Our friend air... Pump should NEVER be wired to run constantly. (unless you own a pump factory?)
  9. patsfan78

    patsfan78 Web Development | HVAC

    Jun 3, 2009
    Circulators should never run all the time, there is no need. Sounds like a bad relay or a bad install.

    You will hear sound depending on the location of the pump to where you are hearing it. Check to see how well your piping is secured, you maybe able to tighten them up a bit.

    Get the air out... annoying problem but a simple solution.

    good luck,
Similar Threads: Newbie hydronic
Forum Title Date
Boiler Forum Newbie boiler / hydronic baseboard sketch & basic troubleshooting Sep 22, 2013
Boiler Forum Newbie Circulator?? Questions Apr 10, 2013
Boiler Forum Newbie with Alpine issues Mar 2, 2013
Boiler Forum Advice for Newbie Oct 9, 2009
Boiler Forum Adding basement zone to hydronic boiler / enclosing boiler Feb 5, 2017

Share This Page