Page 1 of 2 12 LastLast
Results 1 to 13 of 17
  1. #1
    Join Date
    Jul 2002
    Posts
    38

    Question

    Five years ago I had to replace my outside Carrier unit with a Janitrol. The old Carrier size was 2.5 ton, and the replacement was a Janitrol 3 ton. The inside coil is a Carrier 3 ton (Why would an installer mix inside and outside unit sizes?) The piston was never changed or checked to match the configuration. The house cools but not usually below 76-77-78 and upper 40% in humidity. Would matching the piston to the current configuration make a difference in the cooling capability of the system? Unit is installed in an attic 2 story home. Would it be worth the expense to correct this? Would it make a consideralbe difference in the cooling capability?

    [Edited by DIY_Greg on 07-13-2006 at 07:15 PM]

  2. #2
    more then likely yes it should be part of the install but most goodman installers are hacks so thats what you get and thats why there product name is not very good

  3. #3
    also janitrol and goodman are the same thing

  4. #4
    Join Date
    Jun 2003
    Location
    Florida
    Posts
    9,548
    Originally posted by thomefan2579
    more then likely yes it should be part of the install but most goodman installers are hacks so thats what you get and thats why there product name is not very good
    This is pretty funny, as I have a few GOODMAN'S I have installed that have run longer trouble-free than some name brands installed by "professionals",and I'm not an INSTALLER! Your comments are worthless.
    If everything was always done "by the book"....the book would never change.

  5. #5
    Join Date
    Mar 2006
    Location
    cincinnati, ohio
    Posts
    258
    the piston should always match on tonnage
    Knowledge comes with experience

  6. #6
    Join Date
    Feb 2005
    Location
    Alabama
    Posts
    534
    Originally posted by DIY_Greg
    Five years ago I had to replace my outside Carrier unit with a Janitrol. The old Carrier size was 2.5 ton, and the replacement was a Janitrol 3 ton. The inside coil is a Carrier 3 ton, (maybe the initial install was done to increase SEER or just cookie cutter community installs.?). The piston was never changed or checked to match the configuration. The house cools but not usually below 76-77-78 and upper 40% in humidity. Would matching the piston to the current configuration make a difference in the cooling capability of the system? Unit is installed in an attic 2 story home.

    Simply put, yes. The indoor piston size must match the size as stated on the outdoor units rating label. Carrier 3 ton if I can remember right should be around a #65 piston but don't quote me on that. They do need to match though.
    "If you can't fix it, don't break it."

  7. #7
    Join Date
    Jun 2006
    Posts
    126
    Originally posted by thomefan2579
    more then likely yes it should be part of the install but most goodman installers are hacks so thats what you get and thats why there product name is not very good

    I have put in Alot of Goodman,Trane,American Standard and im NOT by any means a Hack and ive seen just as many hacked A/S, Trane and carrier units hacked by lousy installers

  8. #8
    Join Date
    Jul 2002
    Posts
    38

    Question

    Thanks for the input. To do this, I know it will require the system to be purged, piston changed in the attice on inside coil, vacuum pulled for leak test, and recharged. Will this affect the dryer, or lead to possible contamination? I am not a Technician, nor would I attempt to do this. I like to be as educated as possible to ensure I am receiveing the best service. Would doing this help with the cooling of the house? Is it worht the time and money?

  9. #9
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    33,376
    What size piston? When you mismatch, how do you do it? Everybody seems to call for a different size. So if Goodman wants a 73 and you hack a Goodman on a Carrier coil, do you put in the 73 that the Goodman might want vs a 70 that Carrier does?

    We were on a 12 SEER Goodman on a Trane air handler. It had a 77 piston for a 3 ton which is what Trane calls for. Low head and high suction. Obviously that was wrong. We put in a smaller piston and got the suction down a bit.


  10. #10
    Originally posted by DIY_Greg
    Will this affect the dryer, or lead to possible contamination?
    I will rather replace the dryer if I have changed a major part of an AC.

  11. #11
    guys chill you must remember i am talking baout my area NE Ohio and in my 8 years in the field 90 percent of hack jobs are goodman and janitrol since they will sell to almost anyone. Also most top of the line contractors wont touch them or will use them only if the customer has a very tight budget smokin also how can you say goodman and trane are equal as it seems you are. the quality of workman ship and noise levels are not even close no matter how well you install them im just stating the facts I know you love your little janijunk and goodcrap systems but dont have to be defensive I would never buy a kia or put the kia hvac system in a customers home

  12. #12
    Join Date
    Jun 2003
    Location
    Florida
    Posts
    9,548
    Thomefan,

    First off I don't bash any brand,even though I can name some highly over-rated equipment. Second, compare apples to apples. A 13 seer Trane is pretty darn similar to a 13 seer Goodman. You state noise levels. The last Goodman I installed we had to check the lineset because you couldn't hear it running.

    A well-running Kia beats a broken down Caddie anyday.
    If everything was always done "by the book"....the book would never change.

  13. #13
    we will agree to disagree this site is not for us guys to fight its to help people from screwing up and to guide them

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