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Cleaning Flat Plat Heat Exchanger

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by dogwood, Nov 20, 2012.

  1. dogwood

    dogwood Minister of Fire

    Joined:
    Mar 22, 2009
    Messages:
    634
    Loc:
    Western VA
    Bell and Gosset sent the following instructions for cleaning their flat plate heat exchanger. Thought I'd pass them on.

    "Some suggested methods of cleaning either side of the heat exchanger are listed below: Back flush with a high pressure stream of hot water to remove loose deposits. Circulating hot wash oil or light distillate will usually effectively remove sludge or similar soft deposits. A 5% solution of Phosphoric Acid or Oxalic Acid may be effective in removing more stubborn deposits. For optimum results, the solution should be in a back flush type flow pattern. Rinse heat exchanger with clean fresh water after use."


    Not sure what they mean by a hot wash oil, or a light distillate. I'm going with the oxalic acid as I have some out in the garage.

    Mike

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  2. wardk

    wardk Member

    Joined:
    Jul 19, 2012
    Messages:
    195
    Loc:
    B.C. Canada
    Do you think the acid would clean hard water deposits? We have high calcium,
  3. dogwood

    dogwood Minister of Fire

    Joined:
    Mar 22, 2009
    Messages:
    634
    Loc:
    Western VA
    I would think so wardk. Thats what I had asked the Bell & Gossett about when they sent me the above information. I emailed back about what the light distillate or hot wash oil were, but haven't heard anything back. I don't figure they are for hard water deposits though. I wonder if CLR might work on calcium deposits. In an older post Bob Rohr recommended Hercules Sizzle and I think DaveBP recommended vinegar. If you are cleaning the DHW side make sure anything you use is thoroughly washed out.

    Mike

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