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  1. #1
    Join Date
    Jan 2012
    Location
    indy
    Posts
    471

    rx11 flush retrofitting?

    Opinions on flushing lines when converting from r22 when lines cannot be changed. Is it safe to do those cans say can do up to five units, I did one in a town Home and had to change the dryer a week later the head would start slowly climbing until hi limit cut, I used a whole can just in case an no coils were involved both new??? Any takers

  2. #2
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,046
    We use RX11 and the 1# cans say good for 4-5 ton system. So we just tend to use 1 per system. Bigger cans, more systems. At least at this point, we won't try to flush a coil, you'll never get it all out.

  3. #3
    Join Date
    Nov 2011
    Location
    Charleston, Wv.
    Posts
    1,461
    changing from 22 over 410a?

  4. #4
    Join Date
    Jan 2012
    Location
    indy
    Posts
    471
    Yes 71

  5. #5
    Join Date
    Jan 2010
    Location
    Heat Pump Belt
    Posts
    73
    Heat pump??? Filter drier in right direction??? When we use RX11 flush I have kit that has rubber to make tight seal on pipe if possible have other tech with rag on other end of line blocking slightly use flush then blast with nitro do it several times and should be good But seems you might have another problem on your hands.....

  6. #6
    Join Date
    Jan 2012
    Location
    indy
    Posts
    471
    Ya heat pump w/ biflow dryer changed it and its fine weird huh? I've used the flush along w nitrogen gen as you suggest other times also and no prob I'm just afraid of later problems you know?

  7. #7
    Join Date
    Jun 2008
    Location
    Baltimore, MD
    Posts
    15
    We have used Rx11 and some other off brands (top tech is one that comes to mind) with no issues down the road. We loop the lines at the A/H and follow the directions on the can.

    We have done this on everything from 13-16 SEER equipment with not a single problem.

  8. #8
    Join Date
    Mar 2007
    Location
    Myrtle Beach, SC
    Posts
    2,919
    We use the Quik Flush in the orange can... it works better. You have to blow nitrogen after the flush, then pull a hard vacuup to get all of the flush out. You have to change the vacuum pump oil, as the flush eats out the plastic oil fill plug on the vacuum pump, and the rubber o rings.
    Remember, Air Conditioning begins with AIR.

  9. #9
    Join Date
    Jun 2008
    Location
    Baltimore, MD
    Posts
    15
    Quote Originally Posted by Kevin O'Neill View Post
    We use the Quik Flush in the orange can.
    That's another brand we have used.

  10. #10
    Join Date
    Dec 2011
    Posts
    24
    A product we use is the Diversitech Pro-Flush but the RX11 is fine as well. Don't go cheap on using the flush. What's worse, using more flush to begin with or having a frustrated customer on a call back...to use more flush?

  11. #11
    Join Date
    Jun 2003
    Location
    Chicago, IL
    Posts
    4,384
    Used to use rx-11 when switching to 410a. Then decided it was a waste of $ and switched to just blasting it out with nitrogen. No matter what the flush companies want you to think, the film of mineral oil on the inside of the pipes doesn't matter

    If its a burnout and I'm changing equipment but reusing the lines I still use the rx 11.

    If its a burnout and I'm just changing the compressor, I just use some big HH driers. I don't feel I could reliably get all of the RX-11 out of the coils.

    I've never had issues with any of these methods

  12. #12
    Join Date
    Jun 2003
    Location
    Jacksonville, FL.
    Posts
    4,313
    I use Rx11 to clean my hands.

    Also, if I'm constipated I use it as a hydro colonic.... I've had no problems yet except for the blood in my stool.
    WHY?

  13. #13
    Join Date
    Jun 2010
    Posts
    167
    I've had really good luck with RX11 as long as I use it this way.

    Use more than what is stated on the bottle.

    Do not use the pro flush kit. It doesn't rinse out nearly as well as the pressurized bottles, or at least it doesn't seem to. Anytime you can smell a line set after you've flushed it out with nitrogen and it still knocks you out from flush smell, somethings wrong. It must be higher concentration.

    Put a back pressure on it. Make sure it comes out clear.

    Never flush coils that are attached to line sets. If you are flushing a coil due to a burn out, separate it from your coils and flush your coils and line set independently.

    Use more nitrogen than what you think.

    Don't spray flush on your tools. They do not like it. You may end up with spots on everything.

    Pull a long deep vacuum.

    Make sure you don't just flush it out and be lazy by not changing out an improperly sized line set.

    Do not use it as a hydro colonic!

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