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  1. #1
    Join Date
    Jun 2009
    Location
    StL, MO
    Posts
    580

    McQuay / Thieves / Mucho work

    This one is from last summer. We get a call a week before school starts - "Thieves stole our a/c piping, can you give us a price to replace it?" It turns out we were the only ones to respond.
    One look at this sign and we should have run.

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    This is what we found. Hot gas and liquid lines are broken off at the building and the condenser headers are gone. FWIW, this is a McQuay 220 ton air cooled condenser.

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    First, the coil had to be supported and then we chopped, sawed, hacked the tubes down to the tube sheet.

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    Then we removed the tube sheets (which also support the condenser fans) and peeled away enough fins to work with the tubes. The new hot gas headers are almost done.

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    This is pretty much what we ended up with.

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    Last edited by DaveCR; 09-03-2009 at 11:56 PM. Reason: typo
    UA LU 562

  2. #2
    Join Date
    Feb 2009
    Location
    lancaster ca
    Posts
    68
    wow seems like alot of work looks good

  3. #3
    Join Date
    Jun 2004
    Location
    Western MA.
    Posts
    508
    Not criticizing your work,which is very nice,but was replacing the whole condenser an option?
    I love overtime I just hate working for it.

  4. #4
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    33,917
    Yea, that thing looks a bit on the ancient side

  5. #5
    Join Date
    Feb 2006
    Posts
    509
    a 220 ton condenser is probably worth fixing, even to that extent

  6. #6
    Join Date
    Jun 2009
    Location
    StL, MO
    Posts
    580
    houtonjr - thanks

    sirjames - thanks. Fixing it was the only real option as a new condenser that would fit on the pad (and inside the brick walls) was 8 to 10 weeks lead time - they would have been out of the cooling season by then.

    BaldLoonie - the condenser was seven years old at the time.

    cody350 - yep
    UA LU 562

  7. #7
    Join Date
    Nov 2004
    Location
    South Carolina
    Posts
    1,840
    I think you guys did a great job!! I likes to braze all that stuff- fun

  8. #8
    Join Date
    Mar 2007
    Posts
    3,103
    So did you have to unbraze all that new piping to get the tube sheet back on?

    Seriously, I'm curious to see how the finished product came out... Did you have new stainless tube sheets and panels made up?

    Nice work, well done. I bet the customer was happy, too.

  9. #9
    Join Date
    Jun 2009
    Location
    StL, MO
    Posts
    580
    papa jo - thanks.

    BergerMech Rob - thanks. McQuay didn't swage the tubes in the tube sheet. I believe "floating tube sheet" is the jargon. That end of the coil is now supported from below by the uni-strut seen in the last three pictures. We had our shop shear the original tube sheets and put a 90° bend the on the bottom to stiffen the sheet. The sheets were needed to support the condenser fans.

    For some reason we didn't snap a pic of the finished product. The photos were taken at the end of each day to verify the work in progress. We were afraid the thieves might hit us before the work was complete and payment would become an issue.

    I don't know about the bookkeepers, but the teachers were estatic.
    UA LU 562

  10. #10
    Join Date
    Jun 2001
    Location
    Michigan
    Posts
    12,077
    those sorts of repair jobs you remember over the years. Great Job. The only think is the drop leg outlet. That should street 90 down right out of the manifold.

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