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replaced all parts still has over 30psi burnham V8 boiler

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Comments

  • Jamie Hall
    Jamie Hall Member Posts: 25,262

    Agreed. And my reaction is possibly more firm: the first place I'd look would be for the expansion tank to be undersized, or improperly precharged (either too much precharge pressure or too little could give you the symptom of excess pressure change).

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • RickeyB
    RickeyB Member Posts: 18

    the system has operated for 20 years after installation. I Don't remember exactually when this issue started as i mainly heat with wood. For years I traveled for my job and my wife used the furnace to heat and used no wood.

    Using only the domestic hot water it stays around 20 psi ,I tried the baseboard heat and saw it climbed up to 29 on first fill and shut it down by turning down thermostat. the pressure dropped back to around 20psi.

    I started to check the HWC by what the tech's had stated in my post. shut off water to coil, shut off system power, removed water to get to 15psi. 30 min wait ..and it reduced the pressure to about 5psi. The instructions say that if it rises it could be the HWC but nothing about if it lowers.

    so for the expansion tank being under sized , wouldn"t that have been an issue from day 1 and not 15 years latter.

    my house is small and the tech who did the shotgunning said that my unit was overkill for the size of the house .

    I guess I will have to find another burner tech and take my chances

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