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hot water heating stumper

bovide_4
bovide_4 Member Posts: 161
in THE MAIN WALL
Description:
hot water system, convector rads, new Hoffman #54 auto air vents
house is 70' x 30' 2 floors + basement
boiler approx. 140mbh, mediocre install, supply 1", return 1 1/4", circ. on return, hoping to correct in the spring/summer.
old system, 1 1/2" supply manifold with twelve 3/8" copper tubing runs, one for each convector rad. same for the return.
Taco 007 circ was there before. Changed to a BG100, and only 1/2 of the rads get hot(same thing).
What did I miss?

Comments

  • Alan(CaliforniaRadiant)Forbes
    Alan(CaliforniaRadiant)Forbes Member Posts: 1,243
    Mini-tube

    Did you power purge each loop? I ask because it sounds like an air problem.

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  • Weezbo
    Weezbo Member Posts: 6,232
    sounds like....

    air.

    flush the system?

    any valve lock?
  • Big Ed
    Big Ed Member Posts: 1,117
    air

    Did you get all the air out ?What pressure is the system under? Are the convector valves open? Most are butterfly valves .....Are they just spinning with bent stops?
  • bovide_4
    bovide_4 Member Posts: 161


    There are stop and waste valves on the return manifold. There is 20#'s at 180 deg. I will try power purging it. I was hoping the Hoffman 54's would do the trick, but the 3/8" tubing could have a lot of dips. Will try a BG 36 if all else fails, but I don't want to be an example in Dan H.'s next book about some poor slob who instinctively oversizes the circulator.
This discussion has been closed.

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