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  1. #1

    Confused Trouble pumping down a system

    Tried pumping down a Rheem unit 3 tons. Closed the high side and ran the compressor. Instead on the suction pressure going down, it went up and compressor got loud, went off on overload im thinking. Is this a sign on an overcharge? I was unable to get a high side reading on my gauge but the suction side went from about 50psi to 115psi.

  2. #2
    Join Date
    May 2010
    Posts
    1,291
    So you were doing a passive recovery into a recovery tank?

  3. #3
    Join Date
    Apr 2010
    Location
    Minnesota
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    515
    heat pump.

  4. #4
    Join Date
    Jan 2011
    Location
    New Jersey
    Posts
    27
    is it a split system? how long is the line set? if you have a very long line set your not going to be able to pump down the entire charge into the condenser. pull out your recovery machine. then when you change whatever your going to change charge system back with recovery machine just as fast. easiest solution. also check if its a heatpump.

  5. #5
    Join Date
    Apr 2007
    Location
    Saint Augustine, Florida, United States
    Posts
    1,152
    did you have the tsat calling for air? or did you manually push in the contactor? get your post count up and join the pros in the locked forums. this is not a diy site.

  6. #6
    Join Date
    May 2011
    Location
    south florida
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    182
    what happened after that? nobody can really do a good job of answering that question with that little information.

  7. #7
    Join Date
    Apr 2010
    Location
    Minnesota
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    515
    Quote Originally Posted by eric1589 View Post
    what happened after that? nobody can really do a good job of answering that question with that little information.
    Actually, what happened before that?

    He said it never went down, only went up. But the suction didn't go real high. At least not high enough to be a heat pump.

    Maybe it first went down, then liquid locked the condensor, tripped the IPR valve and then the pressure went up. How'd I do?

  8. #8
    Join Date
    Jan 2004
    Location
    Lancaster PA
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    67,763
    Steve, get your post count up to 15, and apply for pro membership. Once accepted, you can ask question like this in the pro forums, where they can be answered better.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  9. #9
    Join Date
    Sep 2009
    Location
    S.C.
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    1,370
    Quote Originally Posted by JWB View Post
    did you have the tsat calling for air? or did you manually push in the contactor? get your post count up and join the pros in the locked forums. this is not a diy site.

    Hummm... I'll bet 5 Frogs on manually. (Can't say anymore, since this is an open area.) Something is different on a Ruud.
    Yes, I know I Shouldn't But I Just Can't Help Myself...

  10. #10
    Join Date
    Mar 2001
    Posts
    1,482
    Quote Originally Posted by Home&Marine View Post
    Hummm... I'll bet 5 Frogs on manually. (Can't say anymore, since this is an open area.) Something is different on a Ruud.
    Ya Think?
    One way to outthink people is to make them think you think. They'll think you're not really thinking what you're trying to get them to think you think...........

  11. #11
    Join Date
    Oct 2001
    Posts
    6,945
    try the king valve next time
    "when in doubt...jump it out" http://www.youtube.com/watch?v=U1qEZHhJubY

  12. #12
    Join Date
    Dec 2010
    Location
    Palm Beach,Fl.
    Posts
    955
    That loud noise is the scrolls separating due to a high pressure difference. Pressures tried to equalize and that caused the suction pressure to rise. If you were trying to use just the compressor with no fan to pump down, thats probably why it went out so quickly. Odds are you'll have to close both valves and recover the rest.

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