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  1. #1
    Join Date
    Jul 2012
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    Put 'em in series just like superchargers.

    This is why you hire a professional.
    Indeed, each one blows its ever-hotter air into the next one.
    I thought the picture would be appreciated here.


  2. #2
    Join Date
    Aug 2009
    Location
    Beatrice, NE
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    Yeah, but it doesn't look like they bolted them down so if it gets to hot it can just move. If they are heat pumps do you suppose they would have defrost issues?

  3. #3
    Join Date
    Aug 2006
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    Mixing oil and fire with a big spoon.
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    Automatic head pressure control.
    "Right" is not the same as "Wise".

    Don't step on my favorite part of the Constitution just to point out your favorite part.

  4. #4
    Join Date
    Jan 2010
    Location
    Sea to Sky
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    Quad Turbo.....that last fan must really get moving.

    Sent from my SM-G965W using Tapatalk

  5. #5
    Join Date
    May 2014
    Location
    Bay Area California
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    Photo too edited and cropped to know for sure what is going on.

    Maybe some re-roofing going on?
    If you were a real tech, you'd solder a relay on that board and call it good to go.

    I do a triple evac with nitro to remove non condensables.

    I use 56% silver on everything except steel.

    Did you really need the " If you were a real tech " ??

  6. #6
    Join Date
    Jul 2012
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    34
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    Thread Starter
    Some roofing repair was being done on the strip-office building and there was a dispute about the roof which had nothing to do with the units, which were undisturbed and are in use as-placed. Not allowed to show anything about the roofing because of the dispute, only the new condensers -everything up there was new because they are renovating the building. -the roof is 5-6 years old and had some repair work going on.

    I was told the condensers vibrate the roof and make a rumbling/humming noise if screwed down. But I don't know anything about that or enough about HVAC to comment except to post the image of the strange arrangement.

  7. #7
    Join Date
    May 2014
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    Bay Area California
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    Hah, nailed it.

    How did I guess that?
    If you were a real tech, you'd solder a relay on that board and call it good to go.

    I do a triple evac with nitro to remove non condensables.

    I use 56% silver on everything except steel.

    Did you really need the " If you were a real tech " ??

  8. #8
    Join Date
    May 2014
    Location
    Bay Area California
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    I mean, not like I have ever seen anything like that before.
    If you were a real tech, you'd solder a relay on that board and call it good to go.

    I do a triple evac with nitro to remove non condensables.

    I use 56% silver on everything except steel.

    Did you really need the " If you were a real tech " ??

  9. #9
    Join Date
    May 2015
    Location
    KS
    Posts
    302
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    Doesn't work like a Cascade system?

  10. #10
    Join Date
    May 2014
    Location
    Bay Area California
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    Pretty sure a good salesman could sell that to property management.

    Each unit makes more heat to help the next one get hotter to make it easier to transfer the heat to the outdoors.



    Quote Originally Posted by joeysmith View Post
    Doesn't work like a Cascade system?
    If you were a real tech, you'd solder a relay on that board and call it good to go.

    I do a triple evac with nitro to remove non condensables.

    I use 56% silver on everything except steel.

    Did you really need the " If you were a real tech " ??

  11. #11
    Join Date
    Feb 2018
    Location
    Bay Area, Ca
    Posts
    412
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    Quote Originally Posted by BBeerme View Post
    Pretty sure a good salesman could sell that to property management.

    Each unit makes more heat to help the next one get hotter to make it easier to transfer the heat to the outdoors.
    Heat recovery?

    Sent from my SM-G955U using Tapatalk

  12. #12
    Join Date
    Aug 2009
    Location
    Beatrice, NE
    Posts
    8,950
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    If you put them in a square at just the right angle all facing in could you generate a small tornado with them do you suppose?

  13. Likes Core_d liked this post
  14. #13
    Join Date
    Sep 2009
    Location
    Los Angeles
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    A large, prominent piping company in LA/Orange that has well deserved reputation for high end quality work didn't have any freon peons on their payroll. We did all their HVAC maintenance, on their offices, shops, clean rooms and we also performed their start ups & repairs on projects. Was starting up three mini splits down in a well & I must say the line set piping was beautiful... except they were close together & the 1st condenser air discharged into the 2nd & it's into the 3rd. The foreman did NOT want to hear his beautiful work had to be redone. At least the line sets only had a standing nitrogen pressure test.

    What I don't understand about this is I don't ever recall hearing a loud, vibrating mini split condenser & have only seen UCLA spec rubber mounts on their feet for the dorms.
    Sorry men, two meme limit.

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