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Old lineset

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SeanBeans
SeanBeans Member Posts: 520
in Strictly Steam
so I just bought a house in Colorado.. it is part of a condo community and I guess you had the choice to have AC installed at the time the buildings were built.

The Homeowners before me opted to have none.

The refrigerant lines are ran, from my attic to the side of the house.

They capped the lines up in the attic but outside... Nope.

The lines are open and the first few inches are filled with dust, pollen, and whatever else.

I don’t think I have the option to run a new lineset outside exposed so I’m thinking a really great flush?

What would you guys do?

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  • ChrisJ
    ChrisJ Member Posts: 15,706
    edited March 2019
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    SeanBeans said:

    so I just bought a house in Colorado.. it is part of a condo community and I guess you had the choice to have AC installed at the time the buildings were built.



    The Homeowners before me opted to have none.



    The refrigerant lines are ran, from my attic to the side of the house.



    They capped the lines up in the attic but outside... Nope.



    The lines are open and the first few inches are filled with dust, pollen, and whatever else.



    I don’t think I have the option to run a new lineset outside exposed so I’m thinking a really great flush?



    What would you guys do?

    I'm betting R11 flush.

    What sizes are the lines and what size unit do you need?
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • pecmsg
    pecmsg Member Posts: 4,861
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    I wouldn’t chance it. The POE oil used today is a cleaning solvent so anything in there WILL come back to the compressor.

    If they insist a filter drier at the air handler and suction filter at the compressor. At least one change of both!
  • SeanBeans
    SeanBeans Member Posts: 520
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    @ChrisJ

    They ran 3/4 3/8 line.

    I haven’t looked fully into sizing yet, just moved in. But I imagine it’s going to be 2ton MAYBE 2.5. Lots of windows and sun.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,540
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    doubtful that dust and dirt migrated very far inside with the other ends capped especially with the long riser to the attic. I would cut it back 4' and take a look....then flush
    ethicalpaul
  • unclejohn
    unclejohn Member Posts: 1,833
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    A good nitrogen blast into each line into a white kitchen trash bag a see what comes out and go from there. And for sure over size dryers.
    ethicalpaul
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,540
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    @unclejohn

    Agreed
  • SeanBeans
    SeanBeans Member Posts: 520
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    Thanks guys!

    I kinda figured I would be flushing and blasting with nitro.. probably do it a few times to be safe
  • Dave0176
    Dave0176 Member Posts: 1,177
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    I don’t like flushing anything because then you have the flushing agent to deal with, I’ve found blowing the lines out with Nitro works just fine, even on 22 to 410 conversions. Put a suction drier in for a couple weeks and a liquid drier before the txv and you’ll be fine.
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