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  1. #1
    Join Date
    Feb 2013
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    8

    Suction Line Inverted Loop

    I recently had my split system AC unit replaced. I purchased and set the equipment myself and hired an AC technician to do the rest. In reading the instructions for the condensing unit, it calls for an inverted loop in the compressor suction line when the evaporator coil is above the condenser, which mine is. The installer did not do this, and I'm wondering how important it might be. I checked with the company that sold me the equipment and asked them if this would void my warranty. The said no, but I didn't feel that the person who told me really knew.

    Thank you for your comments.

  2. #2
    Join Date
    May 2008
    Location
    Missouri
    Posts
    3,467
    We cannot assist with DIY advice. Call your installing contractor back and ask them. What is "an iverted loop"?

  3. #3
    Join Date
    Feb 2013
    Posts
    8
    If you read my original post, you would know that I did not actually install this equipment.

  4. #4
    Join Date
    Feb 2013
    Posts
    8
    I've already talked to him about it. He said he doesn't normally put them in. I assume they are to keep liquid out of the suction line to the compressor, so I was wondering if someone here could tell me.

  5. #5
    Join Date
    Jun 2011
    Location
    Houston area
    Posts
    1,493
    Normally you put in an oil trap if the condenser is above the evaporator. But I've never heard of this and I've been around the block at least twice.

  6. #6
    Join Date
    Feb 2013
    Posts
    8
    The manufacturer did not say in their literature what the purpose of the line is, but I'm assuming it's to keep liquid from slugging the compressor. They show the trap for the type of installation you describe also. I'm not going to worry about it any more.

  7. #7
    Join Date
    Jun 2011
    Location
    Houston area
    Posts
    1,493
    Quote Originally Posted by Atomg View Post
    If you read my original post, you would know that I did not actually install this equipment.
    Oh, I read your original post and if you understand mine you would understand that I didn't even suggest that YOU installed it.

    I dare anyone here to explain the logic in engineering speak why an inverted loop is necessary, helpful or required.
    The picture in my avatar is of the Houston Ship Channel and was taken from my backyard. I like to sit outside and slap mosquitos while watching countless supertankers, barges and cargo ships of every shape and size carry all sorts of deadly toxins to and fro. It's really beautiful at times.....just don't eat the three eyed fish....

    `. .` .>(((>

    `... `. .` .>(((>

    .` .>(((>

    LMAOSHMSFOAIDMT

  8. #8
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,870
    Quote Originally Posted by Cooked View Post

    I dare anyone here to explain the logic in engineering speak why an inverted loop is necessary, helpful or required.
    Protects the compressor from oil lugging on start up.
    Contractor locator map

    How-to-apply-for-Professional

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

  9. #9
    Join Date
    Jun 2011
    Location
    Houston area
    Posts
    1,493
    Quote Originally Posted by beenthere View Post
    Protects the compressor from oil lugging on start up.
    Nope
    The picture in my avatar is of the Houston Ship Channel and was taken from my backyard. I like to sit outside and slap mosquitos while watching countless supertankers, barges and cargo ships of every shape and size carry all sorts of deadly toxins to and fro. It's really beautiful at times.....just don't eat the three eyed fish....

    `. .` .>(((>

    `... `. .` .>(((>

    .` .>(((>

    LMAOSHMSFOAIDMT

  10. #10
    Join Date
    Jun 2006
    Location
    Richmond, VA
    Posts
    2,870
    OMG...they didn't install an inverted loop???? We do it on every install we provide the equipment for!!! Cause we are warrantying the equipment!!!
    Give a man a fish, he will eat for a day. Teach a man to fish, he will eat for a lifetime.

    Give a man a capacitor, doesn't know what to do. Teach a man to install it, now he knows everything.

  11. #11
    Join Date
    Aug 2012
    Posts
    2,639
    Quote Originally Posted by beshvac View Post
    OMG...they didn't install an inverted loop???? We do it on every install we provide the equipment for!!! Cause we are warrantying the equipment!!!
    My name is TooCoolforschool and I am a chronic over charger.

  12. #12
    Join Date
    Aug 2012
    Posts
    2,639
    Here is some more helpfull info that you may allready know- Units warranties purchased online have allready been voided, of course you will find that out when you need to use it.
    My name is TooCoolforschool and I am a chronic over charger.

  13. #13
    Join Date
    May 2008
    Location
    Missouri
    Posts
    3,467
    If you know how an indoor A (evap) coil is constructed, you'd realize most systems have a "built in" trap in suction line.

    P.S. Actually most experienced professionals know this already......(had to add that!).
    Last edited by wahoo; 02-05-2013 at 03:27 PM.

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