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Thread: New radiator with HR92 makes loud rushing sound

  1. #1
    Automated Home Guru
    Join Date
    May 2017
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    130

    Default New radiator with HR92 makes loud rushing sound

    Just had the small radiator in my office replaced with a larger vertical column radiator. The old one has an old valve with HR92 and an adapter - the new one has a brand new valve and the same HR92.

    It is making a loud rushing sound when on, reminiscent of a washing machine or dishwasher filling up - no gurgles and the radiator is bled. Same as discussed here: https://www.diynot.com/diy/threads/r...-valve.342716/

    It's coming on/off for a few minutes at a time and quite distracting, really rather loud. I notice that while the in-pipe (the one with the TRV) gets nice and hot, the radiator itself never gets particularly warm. I had put that down to the fact it's a 10,000 BTU 4-column monster but now I wonder if something else could be causing both things?

    Can anyone help me diagnose what might be causing this - is the noise source likely the radiator or the valve, and what if anything can I do about it?

  2. #2
    Automated Home Legend
    Join Date
    Jul 2014
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    1,211

    Default

    Balance the radiator

  3. #3
    Automated Home Jr Member
    Join Date
    Mar 2018
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    29

    Default

    Quote Originally Posted by bruce_miranda View Post
    Balance the radiator
    Yep I second this. Close the manual valve fully on the rad, then set the HR92 to pull full heat (30 deg or so), then slowly open the valve until you can feel the pipes pulling the hot water (note, this may come in from either end of the rad).

    Open it as little as needed to get the radiator to a good temp.

    This is way less work than balancing the full system, but i've done it on most of mine and it works a treat. Also balancing a system with Evohome is a tricky thing anyway, as all rads may call at different times, so the system is inherantly unbalanced IMHO.

  4. #4
    Automated Home Guru
    Join Date
    May 2017
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    Default

    That was easy... Many thanks. Learn something new every day!

  5. #5
    Automated Home Sr Member
    Join Date
    Aug 2017
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    75

    Default

    Ive had to do this on my verticale rad, i have it as my bypass radiator and it was too loud so its only open a bit, the auto bypass then kicks in if only the vertical and one other radiator are on.

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