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    3. In hvac/r, what special precautions should be taken with drain lines in walk-in coolers? A.freeze protection B.trapped to prevent air from being pulled in C.sloped downward D.all the above
    In hvac/r, what special precautions should be taken with drain lines in walk-in coolers? A.freeze protection B.trapped to prevent air from being pulled in C.sloped downward D.all the above

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    0  Views: 1376 Answers: 1 Posted: 12 years ago
    Tags: hvac/r
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      Read here http://www.psbindustries.com/pdf/Refrigerated%20Air%20Dryer%20GRD1-15-85.pdf
      12 years ago. Rating: 1
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