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white coated copper heating exchanger piping in large storage tanks

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solradman
solradman Member Posts: 58
in THE MAIN WALL
a customer showed me his copper heat exchangers in his large storage tank used with his wood boiler and asked if this is bad for the pipe and what he should do about. Any ideas?

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  • Larry Weingarten
    Larry Weingarten Member Posts: 3,306
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    Hi, Is the white coating scale from hardness in the tank water? If so, Reducing the hardness while keeping pH in the right place would be a good start. Is the heat exchanger big enough for the heat it's trying to move? If not, scaling is more likely. Is new make-up water coming into that tank? Questions! :p

    Yours, Larry
  • solradman
    solradman Member Posts: 58
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    Will check hardness and ph out
  • hot_rod
    hot_rod Member Posts: 22,158
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    is he is he adding fresh water to that tank occasionally? If so you will continue to add minerals that will attach to that copper tube hx. The scaling happens quickly if the boiler is running 180 and higher as wood boilers tend to do
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • solradman
    solradman Member Posts: 58
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    no fresh water, 1000 gallon tank

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