Results 1 to 6 of 6
  1. #1
    Pagetslady is online now Registered User
    Location : Fleetwood marina
    Join Date
    Feb 2006
    Posts
    379

    Default Modern Calorifier

    Hi I have just installed a new calorifier having removed the 25 year old one. It appears that I need an expansion bottle, in the hot outlet before the first hot tap. I didn't have one of these in my old system, is this because the new system has a non return valve in the cold system. Or will it be ok without one.
    Regards Mike

  2. #2
    KAL's Avatar
    KAL is offline Registered User
    Location : River Dart
    Join Date
    Feb 2006
    Posts
    747

    Default

    I did the same as you the winter before last. I didnt fit an expansion bottle. Has been just fine. I have a feeling that there is a small air pocket in the calorifier (being vertical) that does the same sort of job as an expansion vessel.

  3. #3
    Puggy's Avatar
    Puggy is offline Registered User
    Location : Hampshire, UK
    Join Date
    May 2007
    Posts
    266

    Default

    Me too. I put in a new 25l ECS calorifier and didn't fit an expansion bottle and it all works just fine.

  4. #4
    vyv_cox's Avatar
    vyv_cox is online now Registered User
    Location : North Wales, sailing Aegean Sea or Menai Strait
    Join Date
    May 2001
    Posts
    15,314

    Default

    I would direct you to my website, where all is explained, but unfortunately it has lost most of its photos and drawings, which explain it more thoroughly. The text is still there, so you may like to look at that. http://coxengineering.sharepoint.com...alorifier.aspx
    There is sometimes a need for an accumulator after the calorifier if it has a non return valve on the inlet. In this case the accumulator absorbs the expansion of the heated water. If there is no NRV the hot water can expand back to the accumulator that may be placed close to the pump. If there is no accumulator the expansion may be taken by the hoses but there is a risk that the relief valve on the calorifier will lift frequently, wasting water and inconvenient.

    My boat was built with a calorifier but no accumulator. It worked fine like that but the constant running of the pump whenever a tap was opened, or even for a tiny leak, became annoying, so I fitted one. A worthwhile improvement.

  5. #5

    Default

    Quote Originally Posted by vyv_cox View Post
    I would direct you to my website, where all is explained, but unfortunately it has lost most of its photos and drawings, which explain it more thoroughly. The text is still there, so you may like to look at that. http://coxengineering.sharepoint.com...alorifier.aspx
    You can find some of the photos here: https://www.google.co.uk/search?tbm=...w=1068&bih=763


    If the URL doesn't work it's simply a search in Google Images for http://coxengineering.sharepoint.com...alorifier.aspx and then click to repeat the search for omitted results.

  6. #6
    claymore's Avatar
    claymore is offline Registered User
    Location : In the far North
    Join Date
    Jun 2001
    Posts
    8,402

    Default

    Mine works fine without one Mike.
    I just need to remember to turn on the water supply to it when recommissioning after draining it for the winter.
    Probably shouldnt have shut it in the first place but it seemed a good idea at the time, like so many things in my life...Jimi, Para, Webfoot etc.

Bookmarks

Posting Permissions

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