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Loud circulator

L. P.
L. P. Member Posts: 10
in THE MAIN WALL
Again, thanks for the tip. However, I checked the valves on the last two radiators and they are open. The noise really sounds like a motor. I put my ears against all the copper piping in the basement and I only hear the noise in the return pipe area directly off the circulator and back as far as the last two radiators.

Comments

  • L. P.
    L. P. Member Posts: 10
    Loud circulator

    Heating Experts:

    I purchased a home last summer that had a new Weil McLain gas boiler with a new one inch copper series loop system to service 11 old cast iron radiators located on the first and second floors of the home. The heating system is located in the basement. The circulator is a new Taco 010 and is located on the return side of the boiler.

    The problem I have is, the last two radiators in the loop (closest to the circ) give off a loud noise. Although the circulator itself is not loud, the noise I hear in the radiators is almost like an echoing/vibrating sound from the circulator.

    The radiator closest to the circulator is on the first floor and the one prior to it is located in my second floor bedroom. I'm surprised that the sound travels all the way through the piping to the radiator in my bedroom. The sound cannot be heard beyond the second to the last radiator.

    Would someone be able to provide me with some information on what might be causing the noise. It is almost as if the circulator motor is echoing through the water pipe.

    I appreciate any assistance that you can offer. I have read up on the series loop and I am aware that it is not the most practical design for a hot water-cast iron radiator system.

    Thank you.
  • heatboy_2
    heatboy_2 Member Posts: 48
    When you say......

    ..... 1" series loop, you aren't saying the loop feeds through one radiator then goes through the next and so on, are you?
  • Derheatmeister
    Derheatmeister Member Posts: 1,579


    Sounds like you need to install a Pressure by pass valve?? or are there valves on the Rads? that are throttled down and giving you Flow noises? maybe convent the valves to TRV.s and install the Pressure by pass valve.Just guessing cannot see system. not enough info.!!Richard from Heatmeister.HM.
  • L. P.
    L. P. Member Posts: 10


    Yes, the series loop does feed one radiator and the next one and so on until it ends up back at the boiler.
  • L. P.
    L. P. Member Posts: 10


    Thank you for the response.

    The only valves on the radiators are the main valves and they need to remain open since it is a series loop system.

    It's definitely a flow noise, but it is not heard in the first 9 radiators coming off the supply; only the last two which happen to be the closest to the ciruclator.

  • Derheatmeister
    Derheatmeister Member Posts: 1,579


    If so, then try This: Open all of the Valves Fully and see what happens with the noise level. It may overheat in some areas! please report back !HM
  • Derheatmeister
    Derheatmeister Member Posts: 1,579


    Check if the ones that are making the Noise are fully Open! Some times it is hard to tell and or turn these "Old Valves" it may take some Force?? HM.
  • heatboy_2
    heatboy_2 Member Posts: 48
    The only way......

    .....this will work properly is to repipe the radiators in either a direct return with TRV's, reverse return or home run set-up. You must be working with a 60° delta t, if not higher. 1st rad hot to last rad cold? As long as the piping is what it is, the noise isn't going to leave.

    Maybe the guy will come back and repipe for free?
  • L. P.
    L. P. Member Posts: 10


    I'll check them out this evening and report back tomorrow.

    Thank you.
  • Derheatmeister
    Derheatmeister Member Posts: 1,579


    Yes to HB !I've been trying to get to that..
  • Derheatmeister
    Derheatmeister Member Posts: 1,579


    what kind of circ. do you have?? Is it a big old red one( looks like a boat anchor)? or is it a small little Green one?? maybe you need to post some pix of your system.
  • Radiant Junkie
    Radiant Junkie Member Posts: 1
    11 cast iron rads?? 1\" Piped in series?? WOW!!!

    Sounds as though, the size of the pump just might be pushing the water throught the 1" copper or steel?? too fast. please post pictures.

    someone correct me if i am wrong as i dont have too much experience in radiators, but 1" copper/steel piping shouldnt be flowing more than 8gpm, for that very reason; noise control.

    If the 0010 is operating at flat of the curve, your are pumping 15 gpms through the system, 7 gallons more than it should be for noise free system.
  • Derheatmeister
    Derheatmeister Member Posts: 1,579


    Missed the taco 0010 !Sorry!
  • Radiant Junkie_2
    Radiant Junkie_2 Member Posts: 2
    From dans book, \"How Come?\"

    http://www.heatinghelp.com/heating_howcome4.cfm

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