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  1. #1
    Join Date
    May 2004
    Location
    Austin, TX
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    Change out 3.5 ton r22 condenser for a 3 ton 410a condenser.

    Have a house with a 3.5 ton 2003 r22 condenser which is slightly oversized, going to change out for
    a 3 ton 410a condenser 16 seer. Evap coil is a 4 ton coil rated for r22 and 410a, see photo, going to
    change the TXV to 410a 3 ton TXV.

    This evap coil should work ok, believe old condenser is a 13 seer American standard, with new condenser
    rated at 16 seer, coil being 1 ton oversized should be ok. System had a old 3 ton furnace, last year changed out
    furnace for a 96% unit. Old and new furnace had a 3 ton blower.

    What are your thoughts,


    Can not post the picture.

    Model BV 132 48+X2-B4529

    Refigerants R12 R22 R410a R500 R502.

  2. #2
    Join Date
    Sep 2002
    Posts
    22,738
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    That will work OK - IF you have 1200 CFM across the evaporator and the SSH set properly.

    PHM
    --------


    Quote Originally Posted by edward301 View Post
    Have a house with a 3.5 ton 2003 r22 condenser which is slightly oversized, going to change out for
    a 3 ton 410a condenser 16 seer. Evap coil is a 4 ton coil rated for r22 and 410a, see photo, going to
    change the TXV to 410a 3 ton TXV.

    This evap coil should work ok, believe old condenser is a 13 seer American standard, with new condenser
    rated at 16 seer, coil being 1 ton oversized should be ok. System had a old 3 ton furnace, last year changed out
    furnace for a 96% unit. Old and new furnace had a 3 ton blower.

    What are your thoughts,


    Can not post the picture.

    Model BV 132 48+X2-B4529

    Refigerants R12 R22 R410a R500 R502.
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  3. Likes DavidDeBord liked this post
  4. #3
    Join Date
    May 2004
    Location
    Austin, TX
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    Thread Starter
    Thanks thought it would, and yes 1200 cfm

  5. #4
    Join Date
    Jun 2005
    Location
    SW Wisconsin
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    Austin, TX is a dry climate area so a ton over-sized should work.
    I wouldn't want a ton over-sized coil in a real humid climate.

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  7. #5
    Join Date
    Nov 2007
    Location
    central Nebraska
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    For us ignorant people, what is so bad about being 1 ton oversized in a Humid location?
    Rick

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  9. #6
    Join Date
    Sep 2005
    Location
    Atlanta GA area
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    Quote Originally Posted by raharra View Post
    For us ignorant people, what is so bad about being 1 ton oversized in a Humid location?
    Rick
    Not enough capacity in the AC unit to get the entire oversized coil cold enough to dry out the air.
    GA-HVAC-Tech

    Your comfort, Your way, Everyday!

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  11. #7
    Join Date
    Nov 2007
    Location
    central Nebraska
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    Thank you

  12. #8
    Join Date
    Sep 2002
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    I would trim the airflow lower to maintain an oversized evaporator coil's temperature to 38-40º or so. On this one I think you might end up in the 300-per range.

    That way you dehumidify really well and plus; you have more surface area collecting moisture out of the airstream.

    A 'too big' evaporator is win/win but you have to be able to lose airflow while maintaining distribution to all the conditioned spaces.

    PHM
    -------




    Quote Originally Posted by udarrell View Post
    Austin, TX is a dry climate area so a ton over-sized should work.

    "I wouldn't want a ton over-sized coil in a real humid climate."
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

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  14. #9
    Join Date
    Mar 2015
    Location
    Hamersville, Ohio
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    Edward,

    Are you changing out the line-set, or using the existing one?
    Hos 4:6 My people are destroyed for lack of knowledge. Because you have rejected knowledge, I will also reject you, that you may be no priest to me. Because you have forgotten your God’s law, I will also forget your children.


    "You've got to Stand for Something or You'll fall for anything" (A. Tippin)


    We are on a "Man-made Highway to Hell", Our so called "Leaders", Political & Religious, are encouraging The Mushroom like Sheeple to go faster.

    (AC-DC Lyrics)

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