Results 1 to 7 of 7
  1. #1
    Join Date
    Sep 2006
    Location
    Southern California
    Posts
    86

    Microchannel Condenser and Subcooling for 410A

    I was told by the local Mcquay rep. here that on microchannel condenser coils that as the load on the system goes up the subcool goes up and when the load on the system goes down the subcool goes down. Should i throw out the window all i learned in school about subcool? Is it something to do w/ the all aluminum microchannel condenser coil w/ 410A? See attachement & look at checking subcool #5, It even states there what the Mcquay rep. said. Unit in question is a Mcquay Maverick 11 MPS040E. Can somebody here enlighten me on this subject..
    Attached Images Attached Images

  2. #2
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    33,399
    I think they typed it backwards. Low subcool usually says low charge not too much as they said!

  3. #3
    Join Date
    Oct 2011
    Location
    North Phoenix
    Posts
    37
    I see they farmed their Operations Manual design, type, spell check, data check (you get the point) off to China also, DAMN THEM. One more thing to trouble shoot...

  4. #4
    Join Date
    Jun 2011
    Location
    Utah
    Posts
    15

    Hmm

    Subcooling let's me know how much ref is in condenser coil. Perhaps as the load on the unit goes up they regulate the liquid ref. forcing more into the coil to keep. up maybe using some new epr valve only for the condenser.

    Thoughts any one ?

  5. #5
    Join Date
    Feb 2010
    Location
    Landis North Carolina
    Posts
    528
    Quote Originally Posted by BaldLoonie View Post
    I think they typed it backwards. Low subcool usually says low charge not too much as they said!
    I agree, it says to adjust superheat follow instructions below, then starts on subcooling,I think its a misprint as the temps suggested sounds more like superheat measurements. It didnt say to check subcool, it says to adjust superheat then goes into what sounds like someone that printed manual has there info crossed. But I could be wrong, any other ideas anyone?

  6. #6
    Join Date
    Feb 2007
    Location
    Southern California, LA Metro
    Posts
    387
    Under the Checking Subcooling heading there aren't any temperatures. Everything under that heading looks good. Item 5 simply got misprinted, apparently nobody proofread.
    A heavy load will increase temperature of the refrigerant leaving the evap. coil, raising pressure in the TXV suction sensing bulb, opening the TXV, allowing more refrigerant flow, lowering the superheat. If the flow is great the subcooling will decrease.
    Larger Duct, Larger Duct, More Air, More Air
    READ THE MANUAL
    What if I train them and they leave?
    What if you Don't train them and they Stay!
    DSG member

  7. #7
    Join Date
    Feb 2007
    Location
    Southern California, LA Metro
    Posts
    387
    Quote Originally Posted by toy501 View Post
    I was told by the local Mcquay rep. here that on microchannel condenser coils that as the load on the system goes up the subcool goes up and when the load on the system goes down the subcool goes down. Should i throw out the window all i learned in school about subcool? Is it something to do w/ the all aluminum microchannel condenser coil w/ 410A? See attachement & look at checking subcool #5, It even states there what the Mcquay rep. said. Unit in question is a Mcquay Maverick 11 MPS040E. Can somebody here enlighten me on this subject..
    York uses Microchannel coils as well. They do not change the laws of physics.
    Larger Duct, Larger Duct, More Air, More Air
    READ THE MANUAL
    What if I train them and they leave?
    What if you Don't train them and they Stay!
    DSG member

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event