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  1. #14
    Join Date
    Aug 2012
    Location
    Portland, Or
    Posts
    124
    410

  2. #15
    Join Date
    Aug 2012
    Posts
    2,594
    Quote Originally Posted by Iceman_pdx View Post
    410
    hijacked

  3. #16
    Join Date
    Aug 2012
    Location
    Portland, Or
    Posts
    124
    Thanks Elfshadow I appreciate your help. Will install a check valve in new unit.

  4. #17
    Join Date
    Jun 2004
    Posts
    1

    Loud Scroll is Dying Scroll

    Scroll Compressors get noisy when the scrolls turn backwards at shutdown due to reexpansion of the gas through the scroll - not good. They are noisy at startup becasue they are designed to operate well at a relatively narrow range of operating pressure and outside this as with transients at startup the scrolls are unstable and there is metal on metal contact - again not good. Scrolls, while more volumetrically efficient than recips, have much more losses in friction than recips - and once again not good. Recips are used in the tough applications like refrigeration becasue they are very robust and quiet over a very wide range of pressure ratios...go with the recips.

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