.71 Piston ???
Page 1 of 2 12 LastLast
Results 1 to 13 of 14

Thread: .71 Piston ???

  1. #1
    Join Date
    Aug 2011
    Posts
    13

    Smile .71 Piston ???

    Ive got a 3 ton older 10 seer trane and a goodman 3 ton coil. With the .71 piston size my evap seems to be starving with only 3or 4 inches on bottom of A coil cold. I think the a coil needs a bigger size orifice. any suggestion on what size to exchange piston with to increase coil capacity. Suction line not getting as cool as needed at the service ports.

  2. #2
    Join Date
    Aug 2010
    Location
    Memphis
    Posts
    343
    what does the condenser call for

  3. #3
    Join Date
    Aug 2011
    Posts
    13
    Does the data on nameplate offer any info? manual is not avail. Whats your experience

  4. #4
    Join Date
    Aug 2010
    Location
    Memphis
    Posts
    343
    It may say but I doubt it. Go to manufactur and give model and serial.

  5. #5
    Join Date
    Aug 2010
    Location
    Memphis
    Posts
    343
    superheat, subcooling

  6. #6
    Join Date
    Aug 2011
    Posts
    13
    Gotcha, time to pull out the fieldpiece.

  7. #7
    Join Date
    Feb 2005
    Location
    GEORGIA
    Posts
    1,532
    Not to be a stickler about math...

    But if you have to call tech support, it is a .071..........

    Little bitty hole..

    "Value our Differences"

  8. #8
    Join Date
    Jul 2006
    Location
    Virginia
    Posts
    4,604
    a txv and start kit

  9. #9
    Join Date
    Dec 2007
    Location
    north suburbs of Chicago
    Posts
    513
    Hmmmm the first thing that should come to mind is that that coil did not suddenly have the wrong orifice. Has it not worked in all the years it has been installed? Plugged cap tubes?

  10. #10
    Join Date
    Aug 2010
    Location
    Memphis
    Posts
    343
    Quote Originally Posted by catmanacman View Post
    a txv and start kit
    or that

  11. #11
    Join Date
    Aug 2011
    Posts
    13

    thanks

    Thanks for the reply, I have been thinking about this. Possibly a clogged or partially clogged dryer near the compressor. My next step will be to add a txv kit. Going to check the price today.

  12. #12
    Join Date
    Feb 2009
    Location
    Tallahassee, FL
    Posts
    5,974
    The piston size is listed on outdoor unit data plate.

    I didnt believe I had missed that all these years....but it is there!

    10seer 3ton Trane is likely a .069-.071 though.

  13. #13
    Join Date
    Aug 2011
    Posts
    13

    Cool

    I'm gonna look closer myself. thank you for your reply.

Page 1 of 2 12 LastLast

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