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  1. #1
    Join Date
    Mar 2005
    Posts
    187

    line sizing for 3 ton split

    Have unfinished 3 ton system ( contractor ran away). furnace and cooling coil installed with ductwork tied in . refrigerant lines tied in as well. no condencer yet , no gas line and no control wires. My suction line is 3/4 (refrigeration) and liquid is 3/8. Lines about 45-50 ft long and 20 ft. high split between AH and CU (CU below). System is Rheem and according to their specs suction should be 7/8. But customer do not want to go through trouble opening walls and pay extra for repiping it( I guees he got ripped on that one). He wants to go with cheapest condencer what will match install ( probably not Rheem.
    Question is if I should be worried too much about slightly undersized suction line.

  2. #2
    Join Date
    Dec 2002
    Location
    Arizona
    Posts
    4,366
    [Question is if I should be worried too much about slightly undersized suction line.
    [/QUOTE]

    I assume we're talking about R22, if that's the case yes it will work mechanically. You will however have a capacity drop due to line set sizing.

    Jimj

  3. #3
    Join Date
    Mar 2005
    Location
    burlington county n.j.
    Posts
    9,738
    CYA, make the homeowner sign off on the undersized lines he does not want replaced.

  4. #4
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,084
    3 ton 3/4" is fine for a Rheem. If that's what the evap is, I sure would want to install a matching CU. If budget doesn't permit a RAND, then how about a 13AJA36. Nice units for the buck, priced like a cheapo builder but built like a tank.

    I saw something in a Detroit J-mart I liked if they enforce it. Signs everywhere saying no compressor warranty if unit isn't with a matching evap!

  5. #5
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,084
    A few of our 13AJAs from the last couple months
    Attached Images Attached Images     

  6. #6
    Join Date
    Mar 2005
    Posts
    187
    thank You all for replies. any sugestions who sells them in NJ?

  7. #7
    Join Date
    Nov 2000
    Location
    Eastern PA
    Posts
    68,943
    Quote Originally Posted by uke View Post
    thank You all for replies. any sugestions who sells them in NJ?
    P & N Supply
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


  8. #8
    Join Date
    Mar 2005
    Posts
    187
    Do You have more specific info on P&N. I do not deal with them so I do not know where to look for them.

  9. #9
    Join Date
    Nov 2005
    Location
    so cal
    Posts
    176
    as any good journeyman would say "what a clusterF*^& system design is a given @ 25'...thats a no go on the warranty sir...i can size the suction line right for you and the warranty will cover it next time, that is after a triple sweep and 500 microns it'll run as long as my dads will...
    customer: sold git r done...

    10/4?

  10. #10
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,084
    Quote Originally Posted by uke View Post
    Do You have more specific info on P&N. I do not deal with them so I do not know where to look for them.
    http://www.pndistribution.com/

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