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  1. #53
    Join Date
    Nov 2011
    Location
    St. Louis
    Posts
    2,911
    Crap! Emergency pricing edit please!!!???

  2. #54
    Join Date
    Dec 2007
    Location
    north suburbs of Chicago
    Posts
    513
    Quote Originally Posted by hurtinhvac View Post
    No...I haven't screwed up that bad yet - but point taken.

    I have to admit to wincing now and again as I fill out the bill.

    "Our price book is based on a national average...blah...blah...blah...."

    "It cost a fortune to have them on the truck and installed within a few hours...yada...yada...yada..."

    'Bout how much do you get for a trip and...say a 40/5 440?
    Maybe you should throw a ski mask in the truck. Once for a joke with a long time fun client I walked back in with the bill wearing one of those old time black burglar eye masks you find in the odd ball stores.

  3. #55
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    16,998
    Quote Originally Posted by hurtinhvac View Post
    Crap! Emergency pricing edit please!!!???
    I asked the editing genie to come and help you out....
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  4. #56
    Join Date
    Feb 2004
    Location
    Midwest
    Posts
    9,919
    Quote Originally Posted by Glennhvac View Post
    I think that may just be a matter of statistics as Rheem/Ruud are one of the very few units that I run across that mount them that way. If anything I would bet the ambient temp is higher in that location simply due to the fact you are adding heat from air pulled across the condensor.
    The caps are in the path of the air before it goes through the condenser.
    I service several 8-plexes with those, and service a lot more because I installed that brand for several years. Haven't had any die during this heat wave - yet.

  5. #57
    Join Date
    May 2009
    Location
    South of Heaven
    Posts
    1,089
    I've been using Turbo 200's on alot of stuff this year and they seem to be holding up. Last year I was having to do freebie return visits ( versus the year before where I was making bank on caps ). The Turbo's cost more , we charge more and knock on wood don't have to go back. I used to think that the price for these was unreasonable but not this year.

  6. #58
    Join Date
    Feb 2012
    Location
    central Florida
    Posts
    154
    those turbos are great they come with a 5 year warranty.Made by amrad which seems to be a top notch company.worked for a company that carried packards.Had such a high failure rate quit carrying them.Some failed after 6 months.

  7. #59
    Join Date
    Nov 2011
    Location
    St. Louis
    Posts
    2,911
    Now that a couple of you mention it, I don't seem to recall replacing many buried Rheem / Rudd caps. Which is a good thing for another reason apart from getting a swollen cap out of it's grave with those goofy screws that sit right on the lip: I have a hard time reading the specs on these caps during C&C's as the writing is exposed to the elements down below.

    I've been slowly compiling a list of cap specs for every unit I open up - hoping to one day have a pretty good list of the most popular units so as to avoid calling the office or supply house - hate waiting on hold...breaks my rhythm.

    Still looking for references in this regard if anyone has a link or suggestion?

  8. #60
    Join Date
    Dec 2007
    Location
    north suburbs of Chicago
    Posts
    513
    Quote Originally Posted by midhvac View Post
    The caps are in the path of the air before it goes through the condenser.
    I service several 8-plexes with those, and service a lot more because I installed that brand for several years. Haven't had any die during this heat wave - yet.
    Oops you are right. I install the same units and forgot they are under the control box outside the coil. Thinking of another older unit.

  9. #61
    Join Date
    Jul 2005
    Posts
    5,153
    Quote Originally Posted by JBM1000 View Post
    Hardly any pass a under load test, most are 3 micro fared under then.
    Maybe you need a more accurate clamp meter.

  10. #62
    Join Date
    Jul 2005
    Posts
    5,153
    Quote Originally Posted by Glennhvac View Post
    I don't think it's the heat on the capacitor. I think it's voltage being dropped to keep up with load.
    Nope. Increasing the load on a PSC motor reduces the voltage across the run capacitor. It's primarily the heat that's getting them, coupled with the capacitor being a PoS right out of the box.

  11. #63
    Join Date
    Feb 2004
    Location
    Midwest
    Posts
    9,919
    I think we're getting closer to the source of the problem - a combination of conditions - heat and higher voltages. Caps are rated for voltage. The higher the voltage rating of the cap, the more durable it should be. And IMO you can't trust the voltage ratings on the "POS" ones.
    In my area, the line voltage is already pretty high to start with, i.e. in the 240-252V range. And it isn't unusual to measure over 370V across a new, tested cap. The question in my head is what happens when you start heating up the shell of the cap, i.e. does it make it less able to handle that rated voltage?
    In short, what cap temperature is that voltage rating valid for?

  12. #64
    Join Date
    Feb 2004
    Location
    Midwest
    Posts
    9,919
    Here's a link to a technical article about the effect of high ambient on the life of electrolytic caps. It's primarily about DC voltage, but might also apply to AC.

    http://www.newark.com/pdfs/techartic...ultipliers.pdf

  13. #65
    Join Date
    Dec 2007
    Location
    north suburbs of Chicago
    Posts
    513
    Quote:
    Originally Posted by Glennhvac
    I don't think it's the heat on the capacitor. I think it's voltage being dropped to keep up with load.
    Nope. Increasing the load on a PSC motor reduces the voltage across the run capacitor. It's primarily the heat that's getting them, coupled with the capacitor being a PoS right out of the box.


    Yep, starting to lean toward the cap shell temps as the problem but I still maintain that they also tend to blow when the power company starts jerking around as well. I have had a good number of calls that were blown caps the day after an evening storm when the power was dropping in and out. Could be coincidental.

    Plus when you take into account how many of those ancient 10 pounder caps are still going strong....heck I had some 30's and 40's laying around for emergency that were like 4"x3"x10" bricks! Plenty of radiant surface area to be sure.

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