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  1. #1
    Join Date
    Jul 2008
    Posts
    8

    Compressor oil and charging

    I have a new Tecumseh compressor without oil. The Hvac tech that will be
    installing it in 2 weeks says that it does not need oil and there is oil already
    in the R22 that is charged. As an engineer, i disagree. I read that for an
    R22 unit, mineral oil is what is recommended by Tecumseh. He is also going
    to install a new evap coil at the same time.

    I have printed out all the data sheets for him. He has around 20 years
    experience. While i read that most compressors ship with oil, why would a
    tech not know about what i am talking. Just to make sure i have him
    do it right, what is the best way to add the right amount of oil?

    Pour 1/2 the oil through the low pressure side and the other half to the
    high pressure side? Then have him connect the tubes and braze it? May
    be he will know when he sees, but i am trying to get all my facts straight
    before he touches the stuff.

    I had this compressor as a spare unit that came with the house. Its new,
    but has been sitting for a while. I have an evap coil leak. So while i replace
    that i thought i might as well swap out the compressor, since the comp
    is almost at the end of life on a 18 year old home.

    Also would installing a TXV at the evaporator help in any way?
    The system is an 2 ton carrier R22 system.

    Tnx for the help.

  2. #2
    Join Date
    Mar 2005
    Location
    burlington county n.j.
    Posts
    9,765
    how long has it been sitting around with no oil in it??

    where did the oil go?

    was it sealed from atmosphere?

    did you check the dipstick?

  3. #3
    Join Date
    Jul 2008
    Posts
    8
    It is in a box. I see that it has a date stamp of 1996. The previous owner of
    the home left it when they sold the home and moved out 3 years ago.
    So don't know really how old it is other than the date on it.
    I think it is empty because when i shake it, i can hear metal sounding and
    i read that this one should have 1100cc of oil in it per the manufacturers
    specs. All i remember is that the previous owner saying that it is new and
    a spare that they are leaving for me.

    The 2 copper tubes have rubber plugs that are a tight fit on it. I don't think there is a dip stick on this unit. This is a sealed unit. So don't see a dip
    stick like the one on a car engine.

  4. #4
    Join Date
    Nov 2007
    Location
    Hattiesburg, MS
    Posts
    41
    [quote=krish;1938774]I have a new Tecumseh compressor without oil.

    Last edited by Admin; 07-25-2008 at 07:45 PM.

  5. #5
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,797
    That comp comes with oil.
    Keep shaking it, and you can throw it out.



    It most likely has no warranty either.
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    How many times must one fix something before it is fixed?

  6. #6
    Join Date
    Mar 2005
    Location
    burlington county n.j.
    Posts
    9,765
    if it still has the factory rubber plugs it has the oil charge in it, DO NOT remove them. just give it to the tech to install.


    and QUIT shakin it.........

  7. #7
    Join Date
    Apr 2007
    Posts
    623
    If it has been open to atmosphere, you may end up worse off than what you started with. No offense, but it sounds like you need to accept the fact that he knows more about the repairs than you do. Also sounds like you are throwing a lot of time and money away on an 18 yr old system.

  8. #8
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,797
    Not if he's saying the R22 comes with enough oil to fill a compressor.
    Sounds like side job johnny.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  9. #9
    Join Date
    Apr 2007
    Posts
    623
    Quote Originally Posted by beenthere View Post
    Not if he's saying the R22 comes with enough oil to fill a compressor.
    Sounds like side job johnny.
    I didnt catch that part. He does sound a little suspicous, but then again it sounded a little odd that he was willing to install a compressor the H.O had layin around, and he must be workin cheap, if it is worth it to change a coil and compressor on an 18 yr old system. I guess they are both confused. I predict a not-so-good outcome.

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