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  1. #1
    Join Date
    Apr 2002
    Posts
    64

    Confused Condensing Unit HP vs. Compressor HP?

    I have a what I guess is a rookie question.

    I'm replacing a condensing unit and as I was matching model#'s

    So I notice on the condensing unit name plate on a AJA2429ZXAXB see below link

    http://www.johnstonesupply.com/store...ep?pID=B92-818

    The Condensing unit hp states 3/4 but the compressor model number on this unit AJA2425ZXA is only 1/2hp. 2500 btu

    So when I'm matching a unit for a load calc. I'm confused as to what BTU rating to use. 2900btu (condensing name plate) or 2500BTU (compressor name plate).

    thanks

  2. #2
    Join Date
    May 2003
    Location
    Utah
    Posts
    743
    The compressor capacity will vary with the conditions. To see why there is a disparity between the compressor capacity and condensing unit capacity, look at the conditions under which the rating was made.

  3. #3
    Join Date
    Apr 2002
    Posts
    64
    well there is the diff. at evap temp. but why would a 3/4 hp unit have a 1/2 compressor

  4. #4
    Join Date
    Aug 2006
    Location
    st.petersburg,fl
    Posts
    806
    Quote Originally Posted by Laurence View Post
    I have a what I guess is a rookie question.

    I'm replacing a condensing unit and as I was matching model#'s

    So I notice on the condensing unit name plate on a AJA2429ZXAXB see below link

    http://www.johnstonesupply.com/store...ep?pID=B92-818

    The Condensing unit hp states 3/4 but the compressor model number on this unit AJA2425ZXA is only 1/2hp. 2500 btu

    So when I'm matching a unit for a load calc. I'm confused as to what BTU rating to use. 2900btu (condensing name plate) or 2500BTU (compressor name plate).

    thanks
    The capacity will change depending on the compressor , condenser coil match up...

    Go with capacity of condenser in that respect. ( sizing )

    Hope this helps
    Isn't sanity just a one-trick pony anyway? I mean, all you get is that one trick, rational thinking, but when you're good and crazy, well, the sky's the limit!

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