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Aqua Balance 155 combi

denis040
denis040 Member Posts: 7
edited November 2020 in THE MAIN WALL
Hello,

My brother and I installed the Aqua Balance 155 combination boiler. It’s working great except I keep getting some water out of pressure relief valve. My pressure reducing valve is set for 15 but the pressure gauge on the system reads over 20. Could this be as simple as a bad pressure reducing valve?

Comments

  • neilc
    neilc Member Posts: 1,454
    did you set the expansion tank up to 15~16?
    is it properly located? pumping away from it ?
    Pictures?
  • denis040
    denis040 Member Posts: 7
    edited November 2020
    Thanks for the reply. Here is the picture.


  • neilc
    neilc Member Posts: 1,454
    one more picture showing your circulator(s) also,
    was the tank pressure adjusted up ?
  • Big Ed_4
    Big Ed_4 Member Posts: 1,775
    When does it release ?
    I have enough experience to know , that I dont know it all
  • denis040
    denis040 Member Posts: 7
    Tank pressure is for 15
  • denis040
    denis040 Member Posts: 7
    Releases a bit when it’s over 30. Just confused why it’s even getting up that high


  • kcopp
    kcopp Member Posts: 3,815
    That's a potable water expansion tank. Typically they come set to 35psi.
    SuperTech
  • neilc
    neilc Member Posts: 1,454
    what is the temperature at 30# ?
  • denis040
    denis040 Member Posts: 7
    Temperature is 140
  • neilc
    neilc Member Posts: 1,454
    you should request @Erin Holohan Haskell combine these 2 threads,
    my temp question doesn't matter,
    the possible domestic tank does,
  • denis040
    denis040 Member Posts: 7
    Domestic is set for 118. Thank you for your help!
  • Erin Holohan Haskell
    Erin Holohan Haskell Member, Moderator, Administrator Posts: 1,692
    neilc said:

    you should request @Erin Holohan Haskell combine these 2 threads,

    I combined the two threads here. Thanks!
    President
    HeatingHelp.com
  • neilc
    neilc Member Posts: 1,454
    no, the pressure in the tank, you're sure it is set to 15? and not up at 35 as @kcopp suggests ?
    can you get a picture of the tank label
  • Big Ed_4
    Big Ed_4 Member Posts: 1,775
    Is the Pressure reducing valve installed on the suction side of the boiler ? Did you go by the piping diagram in the installation manual ? Pipe it between the connection of the system and the expansion tank . That is the location of no pressure change .
    I have enough experience to know , that I dont know it all
    SuperTech
  • SuperTech
    SuperTech Member Posts: 1,687
    Yeah, @Big Ed_4 is right. Try reducing the pressure and shut down the ball valve before the pressure reducing valve and see if it makes a difference.  
    That definitely looks like a potable water expansion tank, which is the wrong tank for the boiler.  I'd replace the tank, make sure the air pressure is set before you install it on the boiler and relocate the reducing valve so its between the tank and the air separator. 
  • denis040
    denis040 Member Posts: 7
    You guys are best! Thanks so much. Hope you all had a wonderful thanksgiving