});


Results 1 to 7 of 7
  1. #1
    Join Date
    Dec 2008
    Location
    UK
    Posts
    531
    Rep Power
    19

    R32 condensing units in boiler room



    We have a project enquiry and the only accessible place to install the four R32 condensing will be in a ventilated boiler room. Any thoughts as to whether there are any regulations preventing this? We are aware of the flammability risk with R32 in such a location. Just trying to get some information before we quote.


    Mobile A/C at its best, see avatar.

  2. #2
    Brian_UK's Avatar
    Brian_UK is online now Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
    Join Date
    Mar 2001
    Location
    Dorset
    Age
    70
    Posts
    10,726
    Rep Power
    53

    Re: R32 condensing units in boiler room

    My prime concern would be the correct ventilation of the boiler room, I'm assuming that the boilers are gas fired.

    The heat rejected by the condensing units, CU, needs to be removed from the room so that there is no affect on the high level wiring in the plantroom. There are maximum temperature limits for cabling and electric valve motors etc. Also the boiler burners do not really want to see elevated air inlet temperatures.

    Another problem can be during the heating season when to CUs are taking heat out of the plantroom. I have witnessed fully frozen units complete with ice laden drip trays.

    If you are considering ducting the CU discharge out of the plantroom then you must ensure that there is compensating, positive, airflow into the plantroom to comply with the gas burner regulations.
    Brian - Newton Abbot, Devon, UK
    Retired March 2015
    Please support http://the100project.net/Home

  3. #3
    Join Date
    Dec 2008
    Location
    UK
    Posts
    531
    Rep Power
    19

    Re: R32 condensing units in boiler room

    Thanks Brian, most helpful.
    Mobile A/C at its best, see avatar.

  4. #4
    Brian_UK's Avatar
    Brian_UK is online now Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
    Join Date
    Mar 2001
    Location
    Dorset
    Age
    70
    Posts
    10,726
    Rep Power
    53

    Re: R32 condensing units in boiler room

    Just been looking for more exact information.

    A Refcom document may help, or hinder, ... https://www.google.com/url?sa=t&sour...JS897V-z6S0Mx0

    I'd forgotten that R32 is heavier than air so you need to be aware of drainage in the plantroom and is it below ground level. Also you may need to install leak detection equipment along with dedicated ventilation systems.

    It just gets worse, sorry.
    Brian - Newton Abbot, Devon, UK
    Retired March 2015
    Please support http://the100project.net/Home

  5. #5
    Join Date
    Dec 2008
    Location
    UK
    Posts
    531
    Rep Power
    19

    Re: R32 condensing units in boiler room

    Thnaks Brian, that is some helpful information that I can pass on.
    Mobile A/C at its best, see avatar.

  6. #6
    Join Date
    May 2012
    Location
    England
    Age
    54
    Posts
    1,370
    Rep Power
    30

    Re: R32 condensing units in boiler room

    .

    There are changes made in the newer EN 378 2016 standards.

    See

    https://www.agas.com/media/4504/en37...dance-note.pdf

    It give a brief breakdown but one of the changes is "special location or Special plant room".

    They differentialise the location of the room as "Special". Boiler houses might not conform to
    that designation?

    Regards
    Rob

    .
    .. ... -. .----. - / -- --- .-. ... . / -.-. --- -.. . / --. --- --- -..

  7. #7
    Join Date
    Dec 2008
    Location
    UK
    Posts
    531
    Rep Power
    19

    Re: R32 condensing units in boiler room

    Thanks Rob that is most helpful.
    Mobile A/C at its best, see avatar.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •