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  1. #1
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,613

    Microchannel evap

    They're here!

    Nordyne C7 coils. This should be interesting. They say they've tested extensively and they will drain fine.
    Attached Images Attached Images  

  2. #2
    Join Date
    Feb 2012
    Location
    Nebraska
    Posts
    197
    May drain, but how will they clean? I hope filters get changed with those!

  3. #3
    Join Date
    Feb 2009
    Location
    Tallahassee, FL
    Posts
    6,051
    Nordyne says they clean easier because you can use a brush and not damage the fins.

    I also think it interesting how the refrigerant feeds the lower right of coil and suction is from lower left header. Interesting.

  4. #4
    Join Date
    Feb 2012
    Location
    Opelousas La.
    Posts
    90
    I'm not a fan of the micro channel coils. I have found many leaks in the condenser coils(mostly coleman trailer condensers). Time will tell.

  5. #5
    Join Date
    Oct 2003
    Location
    Florida's space coast
    Posts
    2,538
    Changed one out about a month ago on a 3 ton heat pump.
    Seems to be well made.
    Attached Images Attached Images  
    We've been doing so much,for so long,with so little, that now we can do almost anything, with nothing at all.

  6. #6
    Join Date
    Dec 2005
    Location
    Cincinnati, Oh
    Posts
    5,348
    neat stuff. Now if only they can make them smaller somehow.....
    "Better tell the sandman to stay away, because we're gonna be workin on this one all night."

    "Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."

    "Just get it done son."

    Dad adjusted

  7. #7
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,613
    Not many evaps are decent sized anymore except maybe 3rd party coils then you wonder what you are really getting.

  8. #8
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,478
    Cool, first one ive seen.

    Yorks condensers are done that way now but not the h pumps yet. Drainage.

  9. #9
    Join Date
    Apr 2007
    Location
    Loris SC
    Posts
    208
    I've been seeing these come out on commercial ref. condensing units. I haven't had any issues with them but I bet they'll be a pain to fix leaks on them.

  10. #10
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,478
    I was told they had a repair kit but it didnt work out so now theyre just replacing the condenser.

  11. #11
    Join Date
    Jan 2005
    Location
    where it's nice and warm
    Posts
    276
    My question is. How can an expansion feed into a header and still feed may be twenty or more tubes equally.

  12. #12
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    4,483
    just more complicated things for the not so trained people to work on.

  13. #13
    Join Date
    Dec 2005
    Location
    Cincinnati, Oh
    Posts
    5,348
    Quote Originally Posted by ararams View Post
    My question is. How can an expansion feed into a header and still feed may be twenty or more tubes equally.
    Experimental Research and CFD Simulation on
    Microchannel Evaporator Header to Improve Heat
    Exchanger Efficiency

    "Obviously, the single inlet header concentratedly distributes refrigerant into middle portion of microchannel
    coil; the dual inlet header significantly improves the refrigerant distribution uniformity inside inlet coil header; and
    the distributor inlet header performs the most uniformed refrigerant distribution."

    http://docs.lib.purdue.edu/cgi/viewc...0evaporator%22

    Page 7.

    And, it appears these microchannel coils feed on one end of the header, not the middle, which clearly wasn't even considered acceptable enough to be tested in that study.

    Read the conclusions also. They highly suggest uniform distribution, for maximizing efficiency.

    Keeping in mind, thats from 06.


    I wonder if there is something INSIDE the header that acts as a distributer.
    "Better tell the sandman to stay away, because we're gonna be workin on this one all night."

    "Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."

    "Just get it done son."

    Dad adjusted

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