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  1. #14
    Join Date
    Jun 2013
    Location
    So. Cal
    Posts
    58
    Seems to me if the equipment is 15-30 years old it might be time to recommend replacement instead of costly repairs. If you gotta drop 10 lbs in a unit cause of leaking service ports or something keep the 22. But if a comp fails the customer is better to spend now, save later on energy consumption and more costly repairs in the future. I know it's not always that easy to convince people of that or they just plain don't have the money, but if they are going to be financially responsible for that equipment for the next 10 years its money well spent.

  2. #15
    Join Date
    Dec 2011
    Location
    Fort Worth, TX
    Posts
    80
    Quote Originally Posted by jayguy View Post
    I believe that R22 would work best in this situation. It seems that everyone wants to switch old, crappy and under-performing units to a new 'miracle' refrigerant and then they get all surprised by the problems. The problem isn't the refrigerant...it's the unit. Fix the unit and move on. All the time and money that you are putting in this unit with refrigerant that wasn't designed for it seems like a waste. R22 isn't that much more expensive especially on such a small charge unit. If you don't understand things like 'temperature glide' and txv/orifice metering designs, then you aren't doing anyone a favor by re-engineering a unit.
    Thanks for that genius of an idea, I never thought would have thought that a system designed for R22 should have R22 put in it! What was I thinking! Does that mean I should pull out the 1300 lbs of R404a out of that 1250 ton R123 chiller I just retrofitted? LOL

  3. #16
    Join Date
    Dec 2011
    Location
    Fort Worth, TX
    Posts
    80
    Again, I am just looking for experience with NU22B. Not opinions.

  4. #17
    Join Date
    Dec 2001
    Location
    Phoenix, Az
    Posts
    1,222
    Then you came to the wrong place.

  5. #18
    Join Date
    Dec 2011
    Location
    Fort Worth, TX
    Posts
    80
    Quote Originally Posted by Aaronn View Post
    Seems to me if the equipment is 15-30 years old it might be time to recommend replacement instead of costly repairs. If you gotta drop 10 lbs in a unit cause of leaking service ports or something keep the 22. But if a comp fails the customer is better to spend now, save later on energy consumption and more costly repairs in the future. I know it's not always that easy to convince people of that or they just plain don't have the money, but if they are going to be financially responsible for that equipment for the next 10 years its money well spent.
    Agreed, but this facility will be used for only about 2-5 more years before being torn down.

  6. #19
    Join Date
    Jun 2013
    Location
    So. Cal
    Posts
    58
    R22 will be available for another 5 years. Don't waste your time or his money. Bye the time you add up your labor costs to convert and deal with impending issues caused bye conversion they may spend more money, and the equipment still will not operate at anywhere near the manufactured spec's and consume more energy. As someone else said unless your dead set on reengineering this equipment. Here's an idea. Keep all that equipment R22. And in 5 years when they demo the building (haha how often do they really do that) you can recover ALL of that R22 for the customer and he can resell it at a generous markup. I'm sure in 5 years you could find a grocery store, cold storage facility, or supplier that would want 1,000 lbs of R22 at 70% market value.

  7. #20
    Join Date
    Feb 2005
    Posts
    271
    this stuff {r22 replacements} is going to get out of hand,with so many flavors now and everybody using different ones and no one marking on the unit what juice is inside,how many flavors you gotta carry around

  8. #21
    Join Date
    Nov 2004
    Location
    up in the hizzy
    Posts
    1,296
    Quote Originally Posted by Jbart View Post
    Again, I am just looking for experience with NU22B. Not opinions.
    Dont take it personal but seems like you dont understand how a basic refrigeration system works.

  9. #22
    Join Date
    Nov 2006
    Location
    Athens, Ohio
    Posts
    1,398
    I have to go about 10% or a little more over the factory R-22 charge when I switch to NU22-B to get what I consider an acceptable superheat. Pressures have been roughly the same as they would have been with R-22.

  10. #23
    Join Date
    Jul 2010
    Location
    napping on the couch
    Posts
    1,110
    Quote Originally Posted by valdelocc View Post
    Dont take it personal but seems like you dont understand how a basic refrigeration system works.
    Why do you say that?



    Also, I'm assuming this unit has a TXV?
    In 1959, Cuba wanted "CHANGE" too.

  11. #24
    Join Date
    Aug 2006
    Location
    Mixing oil and fire with a big spoon.
    Posts
    4,018
    Quote Originally Posted by Jbart View Post
    Again, I am just looking for experience with NU22B. Not opinions.
    OK. Sorry. I don't have any experience with any 22A, B, C, X, 7...whatever. I just do things right with the correct parts. Sorry again.
    It's tube brushing season...93% done (39.35 miles of tubing)...only 1,242 tubes to go!

    Original member of the Raccoon Brotherhood.

    EVERYTHING IS AWESOME!!!

  12. #25
    Join Date
    Dec 2011
    Location
    Fort Worth, TX
    Posts
    80
    Quote Originally Posted by valdelocc View Post
    Dont take it personal but seems like you dont understand how a basic refrigeration system works.
    I won't, I can't expect you to understand all that's going on here.

  13. #26
    Join Date
    Dec 2011
    Location
    Fort Worth, TX
    Posts
    80
    Quote Originally Posted by kdean1 View Post
    I have to go about 10% or a little more over the factory R-22 charge when I switch to NU22-B to get what I consider an acceptable superheat. Pressures have been roughly the same as they would have been with R-22.
    Thank you for a post with actual first hand experience. I just wanted to hear from someone that has used it and seen it work.

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