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  1. #1
    Join Date
    Sep 2008
    Location
    Cincinnati, Ohio
    Posts
    3

    3/4 Suction Line ?

    Changing out a 3 ton 10 year old Carrier 10 SEER with a Luxairre 13 Seer, condensor & evap.
    The Carrier has a 3/8" liquid line & 3/4" suction - 35 ft. length, 5' rise.
    The Luxairre calls for a 3/8" liquid & a 7/8" suction.
    Questions is - Will I just loose a small amount of effeciency by staying with the 3/4" or any other concerns?
    Thx

  2. #2
    Join Date
    Mar 2005
    Location
    Houston, Texas
    Posts
    11,871
    Why not install what the unit has from the factory?

  3. #3
    Join Date
    Sep 2008
    Location
    Cincinnati, Ohio
    Posts
    3
    Trying to save the expense of a new line set

  4. #4
    Join Date
    Sep 2003
    Posts
    139
    Go ahead and use the 3/4 line set. It will void the warranty that comes with the unit. I don't think the customer will mind.

  5. #5
    Join Date
    Dec 2007
    Location
    Ohio
    Posts
    2,876
    Not only will it void the warranty from the factory but .....

    ......dude it's just not right


    Quit trying to save a few bucks and do it right.....hell, take the old lineset to the scrap yard....you'll make back half the cost of the new lineset.
    I need a new signature.....

  6. #6
    Join Date
    Jul 2006
    Location
    NW burbs of Detroit
    Posts
    6,058
    "A GOOD SERVICE TECH DOES NOT KNOW EVERYTHING BUT KNOWS WHERE TO FIND THE ANSWERS[I]

    Are you even a professional service man?

  7. #7
    Join Date
    Jul 2001
    Location
    Gold Coast of Connecticut
    Posts
    4,582
    Return it for the r-410 unit that has a 3/8 3/4" requirement.
    Aire Serv of SW Connecticut- Gas heat, dual fuel and central a/c systems installed and serviced

  8. #8
    Join Date
    Sep 2008
    Location
    Cincinnati, Ohio
    Posts
    3

    Confused

    Yes, I'm a tech, but a Chiller Specialist, not residential.
    Just trying to help out a friend & save him some $.
    Ask a simple ? & get hammered.
    Nevermind.....I'll try a more cival forum

  9. #9
    Join Date
    Jul 2006
    Location
    NW burbs of Detroit
    Posts
    6,058
    Quote Originally Posted by stfd47 View Post
    Yes, I'm a tech, but a Chiller Specialist, not residential.
    Just trying to help out a friend & save him some $.
    Ask a simple ? & get hammered.
    Nevermind.....I'll try a more cival forum
    If your a pro than put it in the profile.

    If you had a problem with a chiller I bet you'd know exactly where to for specs.

    Extend your self and call the factory or how about the install instruction?

    But your question is also basic theory. Of course it will lose effiency.

  10. #10
    Join Date
    Jul 2006
    Location
    NW burbs of Detroit
    Posts
    6,058
    Quote Originally Posted by stfd47 View Post
    Yes, I'm a tech, but a Chiller Specialist, not residential.
    Just trying to help out a friend & save him some $.
    Ask a simple ? & get hammered.
    Nevermind.....I'll try a more cival forum
    If your a pro than put it in the profile.

    If you had a problem with a chiller I bet you'd know exactly where to for specs.

    Extend your self and call the factory or how about the install instruction?

    But your question is also basic theory. Of course it will lose effiency.

  11. #11
    Join Date
    Feb 2006
    Location
    Tn.
    Posts
    1,344
    Quote Originally Posted by hvaclover View Post
    If your a pro than put it in the profile.

    If you had a problem with a chiller I bet you'd know exactly where to for specs.

    Extend your self and call the factory or how about the install instruction?

    But your question is also basic theory. Of course it will lose effiency.
    What up wit that.You right

  12. #12
    Join Date
    Dec 2007
    Location
    East central Indiana
    Posts
    477
    Quote Originally Posted by Freezeking2000 View Post
    Return it for the r-410 unit that has a 3/8 3/4" requirement.
    Restocking fee > cost of new copper.

  13. #13
    Join Date
    Jan 2004
    Location
    Burleson, Texas
    Posts
    1,741
    IMO, no big deal, maybe a 1% to 2% capacity loss depending on the TEL of refrig lines..

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