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  1. #1
    Join Date
    May 2005
    Posts
    1,401

    whats inside (freon)?

    i got a customer who had a compressor installed by another guy when i couldnt get there..its a 5hp copeland (MRA2-050A-TFC), anyway the saftey on the reciever let freon out, i replaced the thing, and restarted it, i looked at the TXV and its a R-12...but i have high head psi and low low side, but its running on the t-stat....i dont know what the guy put in it cause he was big on that hotshot stuff....anyway, im wanting to change the filter and put in 401A.

    my question is how do u know whats inside and coldnt the expansion valve screw up any guage reading?


  2. #2
    Join Date
    Jan 2010
    Posts
    6,838
    Is not all the refrigerant out of it ?

  3. #3
    Join Date
    May 2005
    Posts
    1,401
    nope...it lost alot though....when i opened the service valves it started back up, im gona guess the room was about 50 degrees and the low side read 12/15 psi, and the high side around 200+..

    i just phoned my customer and told him what id like to do...he'll go for it, but my original question is what bothers me..not knowing what my competitor put in it 6 years ago...my customer will try to find the invoice...

    the high side dual psi safety is set to 400 psi........weird.

  4. #4
    Join Date
    Jan 2010
    Posts
    6,838
    Is it for low or med temp app ?

  5. #5
    Join Date
    May 2005
    Posts
    1,401
    it coOls dead animals..medium..

  6. #6
    Join Date
    Feb 2008
    Location
    California
    Posts
    2,071
    You can only make an educated guess as to whats in there.

    You're doing the right thing by pulling it out and putting in a known refrigerant.

  7. #7
    Join Date
    Dec 2010
    Location
    Woodbridge Twp, NJ
    Posts
    1,308
    Quote Originally Posted by Phase Loss View Post
    You can only make an educated guess as to whats in there.

    You're doing the right thing by pulling it out and putting in a known refrigerant.
    I second that! I use Hot Shot if i see an R-12 TXV. It's a shame now that a tank of it is a small mortgage.
    Every customer you take for granted today will be someone else's tomorrow.

  8. #8
    Join Date
    May 2005
    Posts
    1,401
    Quote Originally Posted by DLZ Dan View Post
    I second that! I use Hot Shot if i see an R-12 TXV. It's a shame now that a tank of it is a small mortgage.
    i paid $300 for my last bottle of r-12....my supplier said r22 is $422 a bottle if i buy 10 bottles..

    thanks guys..

  9. #9
    Join Date
    Jan 2010
    Posts
    6,838
    I think your going to find that R401a (mp39) is much more then R414b (Hot Shot) Although I do like mp39 for w/i apps.

  10. #10
    Join Date
    May 2005
    Posts
    1,401
    ive used 401a everywhere, dont wanta change now..

  11. #11
    Join Date
    Apr 2005
    Location
    Boulder,CO.
    Posts
    559
    This is a rant rather than a solution but I think r-11, 12, 22, 500, 502 are stll the best refrigerants out there.

  12. #12
    Join Date
    Jun 2003
    Location
    Chicago, IL
    Posts
    4,568
    Quote Originally Posted by primmers View Post
    ive used 401a everywhere, dont wanta change now..
    then don't change

    The worst thing you can do is have different refrigerants at each site. Then you have to carry a whole bunch of bottles around.

    I use Hot Shot simply because thats the first r-12 substitute I ever used and never had any problems to justify trying anything else.

  13. #13
    Join Date
    Nov 2009
    Location
    Saskatchewan
    Posts
    493
    I miss R12 and R502.

    Life was so simple. 3 jugs in the truck. Now I have 50 rainbow coloured tanks in the shop and a hand held digital pres/temp toy. And I never take the right colour tank to the job!

    And I cannot recall what a lb of anything sells for. i have chart for that too now!

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