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  1. #1
    Join Date
    Jan 2007
    Posts
    16

    hydronic system with a vent on the roof

    hi everyone
    i recently ran in to a hydronic system with a open vent on the roof.
    the customer's complainting the system is losing water every couple days.
    on the top floor there's a container with a site glass and vent to the roof.
    does anybody have a solution for this problem?

  2. #2
    Join Date
    Dec 2005
    Posts
    783
    Is that a steam system? If it is it is an old one pipe with a condenser box. best to call one of the Dead Men who used to install those systems. OR has it been converted from steam to hot water?

  3. #3
    Join Date
    Nov 2000
    Location
    Upstate, SC
    Posts
    2,919
    Need more information. As hvac1000 asked, is it a steam or hot water system? Does it have a make-up water valve and is it manual or automatic? Does the vent to the roof tie directly to the container with the sight glass?

    Bobby

  4. #4
    Join Date
    Dec 2001
    Location
    Southern Tier, NY
    Posts
    6,066
    itsa gravity system

    so find the leak

  5. #5
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,334
    Use to see alot of those systems.
    Its hot water.
    The vent on the roof isn't the problem.
    As Slim said, you have a leak some where.
    Check inside the boiler, see if the combustion chamber is wet.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  6. #6
    Join Date
    Jan 2003
    Location
    Kansas City
    Posts
    1,482

  7. #7
    Join Date
    Dec 2005
    Posts
    783
    Great link for this problem. Like I said in my other post (get a dead man to fix it. ) :>)

  8. #8
    Join Date
    Jan 2007
    Posts
    16
    Quote Originally Posted by slimwoodie View Post
    itsa gravity system

    so find the leak
    but the thing is, that the newer boiler has a circulator pump.
    is it still consider a gravity system.
    should the vent be cap off. because who ever change out the old boiler, added a expansion tank at the boiler too.
    Last edited by deon1116; 02-27-2007 at 11:58 PM.

  9. #9
    Join Date
    Aug 2002
    Location
    manitowoc wisconsin
    Posts
    4,943
    Quote Originally Posted by deon1116 View Post
    but the thing is, that the newer boiler has a circulator pump.
    is it still consider a gravity system.
    should the vent be cap off. because who ever change out the old boiler, added a expansion tank at the boiler too.
    The old expansion tank & vent should have been completely removed from the system.The installers of the new boiler goofed.
    Take your time & do it right!

  10. #10
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,334
    Its not gravity anymore.
    The vent should be capped off.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  11. #11
    Join Date
    Jan 2007
    Posts
    16
    thank for the help everyone.

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