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  1. #1
    Join Date
    Oct 2006
    Posts
    11

    Proper method to change POE oil

    I was watching over the shoulder of my HVAC service tech who was attempting to get the old POE oil out before putting new in. The system is a 3.5 ton Goodman heatpump on 410A. The reason for the new oil is that both the flowrater and the TX have jammed up over a period of about 4 years. The flowrater had a waxy residue on it when it was removed a while back. That just isn't right. So they are completely flushing the system and replacing the oil and 410A.

    -Trouble is only about 2 tablespoons of POE oil came out. He was pushing nitrogen into the valve on the large diameter line and venting through the valve on the small diameter. This would require the oil to travel from the compressor all the way through the coils in the outdoor unit to get out? This just seems like the difficult way to get the oil out to me. But IANAHVST. Any comments?

  2. #2
    Join Date
    Jul 2006
    Location
    NW burbs of Detroit
    Posts
    6,058
    Yes.

    Trust your contractor.

  3. #3
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,703
    Ain't gonna get the oil out that way.
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    How many times must one fix something before it is fixed?

  4. #4
    Join Date
    Dec 2002
    Location
    Tampa, Florida
    Posts
    706

    Hmm not the correct way...

    Not the correct way to remove the oil from a system. Click on the link below to watch a video on how a system is to be flushed. The guy in this video has made several HVAC videos and does a pretty good job.
    Last edited by beenthere; 10-08-2010 at 05:46 PM. Reason: removed link

  5. #5
    Join Date
    Oct 2006
    Posts
    11
    2 out of 3 say this isn't the right way
    -so what is the right way to get the poe oil out of the compressor?

    That was an excellent video but he had the compressor removed. My guy is doing this without replacing the compressor.

  6. #6
    Join Date
    Dec 2005
    Posts
    1,905
    Quote Originally Posted by timevacuum View Post
    -so what is the right way to get the poe oil out of the compressor?
    .
    Take it out and flip it.

  7. #7
    Join Date
    Aug 2003
    Location
    Fort Worth, TX
    Posts
    11,283
    You have other problems if in four years your system has a waxy residue jamming up your metering device.

    Do you get your condenser coils thoroughly cleaned every year?
    • Electricity makes refrigeration happen.
    • Refrigeration makes the HVAC psychrometric process happen.
    • HVAC pyschrometrics is what makes indoor human comfort happen...IF the ducts AND the building envelope cooperate.


    A building is NOT beautiful unless it is also comfortable.

  8. #8
    Join Date
    Sep 2008
    Location
    VA
    Posts
    1,745
    uhh, replace the compressor, and flush the system properly without the compressor or TXV's connected....
    Good luck with that system lasting it's expected 10 years.
    The new compressor comes shipped with proper amount of oil in it.

  9. #9
    Join Date
    Oct 2006
    Posts
    11
    I don't clean the coils yearly. Curious though. How would this create stuff to jam a valve sealed in the system?

    On the topic of trusting your installer, I've been down that road. And it wasn't fun. I have a new installer now and he's doing a good job. But he's dealing with issues left behind by the last guy.

    So going back to the OP, other than ripping out the compressor, there's not much that can be done to replace the oil in the system?

  10. #10
    Join Date
    Sep 2010
    Location
    NY
    Posts
    325
    I think he is inquiring about the coil cleaning because; a dirty condenser coil will cause excessive head pressure and thus an abnormally high refrigerant temp which may have broken down the oil (I am not too familar with POE) but this is probably the case, I am guessing. The only way to get the oil out is to flip it(the comp) and liquid flush the lines with a product designed for that purpose. Bypassing the metering devices on the indoor and outdoor units.

  11. #11
    Join Date
    Oct 2006
    Posts
    11
    Alright that makes sense. I'll have a good look and give it a clean. Dr.Zarkloff's got a pretty good description of the basic cleaning process. Thanks.

  12. #12
    Join Date
    Jul 2006
    Location
    NW burbs of Detroit
    Posts
    6,058
    Quote Originally Posted by timevacuum View Post
    Alright that makes sense. I'll have a good look and give it a clean. Dr.Zarkloff's got a pretty good description of the basic cleaning process. Thanks.
    Did you hear he got busted for suspicion of child perversion?

    He is in lock up right now.

  13. #13
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,703
    No, I didn't hear that.

    Got a link?
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    How-to-apply-for-Professional

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

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