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30 year old bolier

smklin
smklin Member Posts: 69
in THE MAIN WALL
Is there a way to measure the efficiency of a old raypak boiler cooper fin

Comments

  • Aaron_in_Maine
    Aaron_in_Maine Member Posts: 315
    Weight

    Yeah the weight the scale at the scrapyard says.

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  • unclejohn
    unclejohn Member Posts: 1,833
    Combustion

    Test should do it. Probably low 80's
  • Tim McElwain
    Tim McElwain Member Posts: 4,651
    Checked my records

    on that boiler system combustion efficiency is in the area of 70 to 72% if in good shape. The finned coils if corroded or in any type of disrepair will be in the range of 60%. I have the documented combustion readings to support these figures.
  • Steve Whitbeck
    Steve Whitbeck Member Posts: 669
    Efficiency

    Remember guys - when You are doing a combustion test it is COMBUSTION efficiency not AFUE efficiency.

    If the heat exchanger is clean inside and outside it should have close to the factory rating for efficiency. Most RAYPAC boilers were 80%.
  • Mark Eatherton
    Mark Eatherton Member Posts: 5,865
    Modulating versus non modulating...

    I've seen the efficiency low like Tim has, with the Modutrol modulating gas valve, and low 80's for the Bang Bang boiler like Uncle John's seen.



    The problem with the modulating gas valve is that it doesn't modulate the secondary air, and the excess air carries off a lot of the heat.



    Bang bang short cycles so much, that you end up with an AFUE that looks like the low 70's. The heat exchanger works great in reverse...



    Converting to a mod con wil reduce the energy consumption by 30%, minimum.



    ME

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