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  1. #1
    Join Date
    Aug 2004
    Location
    Chapel Hill
    Posts
    122

    Confused Do you think this quick guide for BUTH load is correct?

    Hello guy, I found this Heatcraft refrigeration engineering manual at one of the manual bookself.
    It is listing a quick selection guide at the back for BUTH load for cooler and freezer.
    It said for a 8x8x8 cooler, for +30 room usage, the BUTH load is 7835.
    If the load is true, then i will be using 3/4 HP compressor with R22 with TXV.
    However, i feel like something is not right about this load.
    Anybody have a second idea? Please share with me
    jcrew4242

  2. #2
    Join Date
    Aug 2007
    Location
    Winter Haven, FL
    Posts
    4,380
    The load will depend on wall thickness. material and location. Outdoor boxes will have a significantly higher load than a box inside a conditioned structure. You can call your heatcraft supplier, and they will run the calculations.

  3. #3
    Join Date
    Aug 2007
    Location
    Winter Haven, FL
    Posts
    4,380
    I see you have a Johnstone nearby. There will be someone there that does this daily.

  4. #4
    Join Date
    Aug 2004
    Location
    Chapel Hill
    Posts
    122
    It is not heatcraft box, it is a keepkite box. the box is located inside the buliding.
    I just found this guide, and wonder how those load came up.
    jcrew4242

  5. #5
    Join Date
    Aug 2004
    Location
    Chapel Hill
    Posts
    122
    I hate to say this.... i went to the Johnstone, they are not good with load.
    All they ask is Model number and order the same thing for you.
    jcrew4242

  6. #6
    Join Date
    Aug 2004
    Location
    Chapel Hill
    Posts
    122
    I rather go to ACR, if i am dealing with load
    jcrew4242

  7. #7
    Join Date
    Aug 2007
    Location
    Winter Haven, FL
    Posts
    4,380
    LOL...havent seen an ACR store in years..I did not know they were still open.

  8. #8
    Join Date
    Oct 2012
    Location
    Wisconsin
    Posts
    4,130
    That Heatcraft table is kind of generic, but it will put you in the ballpark.

    Tecumseh's Box Load calculator is a little more detailed.

    http://boxload.tecumseh.com/BoxLoad.aspx

  9. #9
    Join Date
    Aug 2009
    Location
    Maine
    Posts
    3,480
    They used to have a program that they gave out. It sort of expired with the YK2 thingi. They may have upgraded it.
    Quote Originally Posted by Joe Harper View Post
    The load will depend on wall thickness. material and location. Outdoor boxes will have a significantly higher load than a box inside a conditioned structure. You can call your heatcraft supplier, and they will run the calculations.

  10. #10
    Join Date
    Aug 2002
    Location
    Southold.calm
    Posts
    5,849
    Quote Originally Posted by jcrew4242 View Post
    Hello guy, I found this Heatcraft refrigeration engineering manual at one of the manual bookself.
    It is listing a quick selection guide at the back for BUTH load for cooler and freezer.
    It said for a 8x8x8 cooler, for +30 room usage, the BUTH load is 7835.
    If the load is true, then i will be using 3/4 HP compressor with R22 with TXV.
    However, i feel like something is not right about this load.
    Anybody have a second idea? Please share with me

    I don’t have a problem with the Heatcraft Load Calc, Check it with the Tecumseh calc.

    Why R-22 go with R-404A

  11. #11
    Join Date
    Jul 2014
    Location
    ON
    Posts
    41
    As the other guys said I think it is a very basic and quick calculation. If there is nothing specific with the application then it should be fine. I agree that the program by Tecumseh is more detailed if there is anything that would be of concern.

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