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  1. #14
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    9,793
    Post Likes

    Thumbs up TRANE AHRI 7793615 _ CLG LV TEMP 53.4'F

    Quote Originally Posted by mkwyche View Post
    Hi,

    I currently have a system from 2003.

    Current system spec are:
    - Outside unit Trane XR12: 2TWR2024A1000AB
    - Inside unit Trane TWE031E13FB1 (2.5 - 5 ton)

    I'd like any thoughts on the two options and
    if going up to 2.5 on the outside unit is the correct move given the current
    outside unit is just 2 ton.

    My home is 1346 Sq Ft and I live in Climate Zone 3.

    Thanks in advance for all your feedback.
    __ SPECS __

    TRANE XR17
    ______ HEAT PUMP, 2-TON, 2 STAGE
    or Equal

    __ % R.H. Control
    _ An A/C SYSTEM needs to operate > 9 hours / day
    for 5+ months in Climate Zone 3

    Leaving cooling coil temperature { clg LDB }
    is required to be < 54'F to properly handle humidity.
    / ____________________ maintain < 52% R.H.

    __ Calculated DT > 21'F _____ .:. Do NOT upsize coil.
    [ 77.0'F - 53.4'F = 23.6'F }
    ________

    ZIP _ _ _ _ _ <---- needed to determine CDD ... Cooling Degree Days
    $0.1 _ _ / kw-hr __ needed to determine Operating Cost

    Operating time is calculated based on Local CDD.
    Attached Images Attached Images   
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    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  2. #15
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    9,793
    Post Likes

    S.E. US _ non specific

    OPERATING COST
    ______________ GENERIC

    Basis: A Very Low utility rate
    … … … i.e. Jackson, MS

    A/C System may operate on 1st (Low) stage > 80% of the time.
    ______ … … High stage may be needed at > ~ 89'F
    Attached Images Attached Images  
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

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