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  1. #14
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    Quote Originally Posted by timebuilder View Post
    I will be the divergent voice here, and say that you should only use OEM parts in this type of commercial grade air conditioning machine......you are not fixing a neighbor's condensing unit.
    yes i agree with you and understand the gravity of the situation. Making major repairs, I use OEM 99% of the time.

  2. #15
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    Jun 2018
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    Ct.
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    [QUOTE=pecmsg;25539677]
    Quote Originally Posted by SeampYankee View Post

    yeah man good info, thanks! I was just wondering if it would be possible. not really considering it as a viable repair option. mostly curious if anyone had done it

    Remember when changing from 3 phase to single the amperage is going to go up. No way the wires in the equipment are designed for this type of load.

  3. #16
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    Nov 2011
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    [QUOTE=pecmsg;25539677]
    Quote Originally Posted by SeampYankee View Post

    Remember when changing from 3 phase to single the amperage is going to go up. No way the wires in the equipment are designed for this type of load.
    I absolutely was not advocating installing a single phase in place of a 3 phase. I was talking about installing a replacement 3 phase.

    I suppose I should have clarified.

  4. #17
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    Nov 2011
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    [QUOTE=SeampYankee;25539445]
    Quote Originally Posted by 71CHOPS View Post
    yes i am outside my comfort zone not just on this call but on most calls haha. i'm trying
    Hey, you’re trying, that’s all that matters....just do it SAFELY!!! Nothing you will be working on is worth your life.

    Don’t be afraid to ask for help, and advice. If Anyone in this trade (no matter how long they’ve been in it) says they don’t need help, they’re full donkey doo doo!!

    There are applications where getting a cheaper replacement part is absolutely not the way to go. Then there are times it’s absolutely appropriate. Until you build confidence and experience, you may be better off going OEM. and there’s nothing wrong with that. If something happens a week later, you can say you installed the factory recommended replacement part.

    Take it slow, learn why something works, not how it works, and you be fine!!


    Sent from my iPhone using Tapatalk

  5. #18
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    Nov 2006
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    Quote Originally Posted by HVAC_Marc View Post
    I think the bigger issue is why there was someone else there fiddling with it 3 days before you.
    This is an excellent question.

    In this situation, I would replace the defective fan with an OEM assy, and make 100% clear to the owner that a complete diag of the unit is in order following the replacement. I want to know why that dye was there. Is there an actual leak, or did the guy who was there before you just ASSUME there was a leak????
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
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  6. #19
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    Until you build confidence and experience, you may be better off going OEM. and there’s nothing wrong with that. If something happens a week later, you can say you installed the factory recommended replacement part.



    thanks for your responses man. this part especially. when quoting repairs i almost always do use factory parts for that exact reason. i am new so using mfg recommended parts at least assures me that what im installing is what came out of the equipment. i'm fortunate, ive had a couple callbacks but most of the time i'm pretty careful and thoughtful in diagnosing issues. not saying im good at it but i work hard and do my homework reading manuals and familiarizing myself with our customers specific pieces of equipment. coming here this site has been invaluable as well. you and everybody else who takes the time to respond to questions, mine and everyone else's, make it work. im glad i found this place. im amazed by the knowledge you pros display for diagnosing things sight unseen. like ya'lls WAGs would take me an hour of reading a manual, a google search, and a call to the lead tech to come up with haha

  7. #20
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    Jun 2018
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    Ct.
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    Quote Originally Posted by timebuilder View Post
    This is an excellent question.

    In this situation, I would replace the defective fan with an OEM assy, and make 100% clear to the owner that a complete diag of the unit is in order following the replacement. I want to know why that dye was there. Is there an actual leak, or did the guy who was there before you just ASSUME there was a leak????
    excellent point! thats what i wrote up on the ticket and told the office. i'll replace the fan motor in question but what was going on with that other circuit is still unknown, the compressor I observed in operation has "no gas" written in sharpie on the head dated july 3rd. but was running, whats up with that?? i dont want to just throw in a new motor, get circuit 1 running again, walk away, and have them call back next month because the unit cant keep up again because circuit 2 went flat. i have my work cut out for me on this one.

  8. #21
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    Jul 2018
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    Ohio
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    Quote Originally Posted by SeampYankee View Post
    excellent point! thats what i wrote up on the ticket and told the office. i'll replace the fan motor in question but what was going on with that other circuit is still unknown, the compressor I observed in operation has "no gas" written in sharpie on the head dated july 3rd. but was running, whats up with that?? i dont want to just throw in a new motor, get circuit 1 running again, walk away, and have them call back next month because the unit cant keep up again because circuit 2 went flat. i have my work cut out for me on this one.
    One thing I've learned over the years is no matter who was at the job before me, I go into it as if no one has ever done anything to the equipment to my knowledge.
    Usually if you're going back behind someone else, they obviously didn't fix the issue at hand.
    Remember prescription without diagnosis is malpractice.

    Sent from my XT1710-02 using Tapatalk

  9. #22
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    Jun 2018
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    Remember prescription without diagnosis is malpractice.


    damn man, right on! words to live by whether human patient or hvac equipment!

  10. #23
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    May 2004
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    Salt Lake City/Tooele
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    I learned a few lessons over the years about condenser fan motor swaps and tinkering with 3ph to single phase conversions.
    If you got a small tonnage single fan unit, you have more options as for non-OEM/universal motors and voltage conversions.
    However, with rooftops or air-cooled equipment with multiple fans, things get tricky. If fans are sharing the same air space it is best to go OEM, simple fact is that one motor may overcome the other. Imagine one fan motor left 3 phase and the other swapped to single, if the three phase motor kicks on first and starts to windmill your single phase motor, there is a high probability that the single phaser will struggle to get going in the right direction without quite a bit of effort and may not get there at all. Same would be for mismatched motors sharing the same air, there is a pecking order and one will win and the other ultimately gets kicked out of the nest and dies.
    Now if you have separation between fan motors where they are in separate compartments usually via some sheet metal deal, then things are much more forgiving when it comes to non-OEM and going the single phase route.
    And if you do go single phase on something, don't be a hack. Properly route wiring and secure the capacitor.

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