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  1. #1
    Join Date
    Apr 2006
    Posts
    109

    Small 1/5 hp hermetic compressor

    Hi, Anybody ever come across a new compressor with 1/4 inch discharge port acting and running as a suction port, condensor cold and evaporator warm, this is a single phase, 115 volt small 1/5 hp hermetic compressor with r22 as refrigerant, pressures are 40 psig at ll drier and 60 psig on comp. suction port out the top, disharge is 1/4 inch and suction is 3/8 inch. is this a factory regect, never seen this before. tecumseh comp..
    Never Assume Anything

  2. #2
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,564
    You sure it's piped correctly? There are plenty of pumps out there with a 1/4 or 5/16 discharge line, 3/8 suction line and 1/4 suction tap.
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  3. #3
    Join Date
    Apr 2006
    Posts
    109
    Hi, so what your saying is that on this compressor the 1/4 inch is the suction and the 3/8 is the discharge. i have never seen this before, i was trained that the smaller tube is going to be discharge line. thanks
    Never Assume Anything

  4. #4
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,564
    No. There are 3 tubes on most small tin cans. a discharge which is either 1/4 or 5/16. There are 2 suction tubes. one is 3/8 and the other is 1/4. The 3/8 is for the suction line and the 1/4 is to put a schrader tap on.
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  5. #5
    Join Date
    Mar 2009
    Location
    Mid-Mo
    Posts
    3,595
    Quote Originally Posted by 2sac View Post
    No. There are 3 tubes on most small tin cans. a discharge which is either 1/4 or 5/16. There are 2 suction tubes. one is 3/8 and the other is 1/4. The 3/8 is for the suction line and the 1/4 is to put a schrader tap on.
    ^^^
    A lot of people call the pinched off stub a "process tube".

  6. #6
    Join Date
    Apr 2006
    Posts
    109
    I took measurment with caliper there is 1 tube that comes off the top part of the compressor and goes straight up which is 5/16 and put my schrader for suction press., and there are 2 tubes that come out lower on comp. 1 is 5/16 or .3125 the other is .250 and which data says that is discharge but i am getting suction on this 1/4 inch tube, comp. goin back
    Never Assume Anything

  7. #7
    Join Date
    Jan 2005
    Location
    where it's nice and warm
    Posts
    267
    Don,t forget to use a biflow drier in your new heatpump.

  8. #8
    Join Date
    Jul 2000
    Location
    Guayaquil EC
    Posts
    10,314
    What's the compressor model number?

    Also, if you have the Bill of Material (BOM) number, you can ID the stub tube connections by entering it in this little program: Compressor Housing Drawing App

  9. #9
    Join Date
    Sep 2008
    Posts
    581
    On most of the Tecumseh fractional hermetics I've seen the Suction line is highest and largest. The discharge is next to the process and just below. YMMV.

    Tecumseh has an excellent service handbook, pm me your email if you would like a copy.

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