Page 4 of 6 FirstFirst 123456 LastLast
Results 40 to 52 of 75
  1. #40
    Join Date
    Feb 2006
    Location
    Tn.
    Posts
    1,344
    You can't make anybody on here mad thats been hanging around here a while.
    SAY all you want,but your the only one getting upset.

  2. #41
    Join Date
    Nov 2004
    Location
    Austin, TX
    Posts
    877
    Quote Originally Posted by havactech View Post
    My R22 system is about 15 years old. It has no filter drier on the liquid line. Nor anywhere else on the system

    What I would like to do is just run the system R22 refrigerant through a drier that is looped onto my manifold gauge.

    I appreciate your cooperation and thanks you.
    It doesn't matter which side of the gauge you put the drier. The drier will be full of nitrogen when you open it. It will enter the system and become a noncondensable along with any air in the hoses unless you purge the manifold while connecting it.

    If there was any moisture in the system it would have combined with the refrigerant and oil and produced an acid during the first few years of system operation. This would have shorted/grounded out the compressor motor and you would have already replaced the compressor on an 18 year old system.

    You don't have moisture in the system, if you did it would have killed the compressor by now.

    It is your ac system and it's approaching the end of it's service life. Play with it, kill it and pay someone to replace it if you want. You can afford it. Heck, play with the replacement and kill it too. It's your system and your money.

    The worst that could happen with playing with the refrigerant circuit is frostbite and dumping the refrigerant charge.
    Just let me film it and I can document the occasion for the $35000 fine for each violation from the EPA. You make good money, you can afford it.
    I am for doing good to the poor, but...I think the best way of doing good to the poor, is not making them easy in poverty, but leading or driving them out of it. I observed...that the more public provisions were made for the poor, the less they provided for themselves, and of course became poorer. And, on the contrary, the less was done for them, the more they did for themselves, and became richer.
    ― Benjamin Franklin

  3. #42
    Join Date
    Aug 2008
    Posts
    79
    I know all about purging etc. m-cooling I agree there are some very smart people here and I am not referring to them. Exactly how did I bring this upon myself? I asked a question and received some good advice and ridicule. I can't understand why people have to bash other people like that. Well actually I do understand why.

    Would it have not been better to say its not a good idea and why it will not work as beenthere said. After reading his reply I could understand exactly the reason why this should not be done this way.

    I just don't want to open the system and put in a drier at this time. Like you said my system is near its end and eventually I would install a new R22 or R410A System.

    As far as venting lets not go there. I know there are tech's out there that do not use common sense to only vent in small amounts during purging. I assure you I follow the EPA guidelines.

    Anyhow enough of that. For those who left a constructive response thank you. For those who had nothing better to say get a life cause its obvious that you are unhappy with this profession you are in!!

  4. #43
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,914
    Again I ask, what brand of outdoor unit do you have?
    If more government is the answer, then it's a really stupid question.

  5. #44
    Join Date
    Aug 2008
    Posts
    79
    Its a Weatherking 3.5 Ton. I was wrong on the amount of refrigerant . On the receipt for over 5 years ago they added 2 pounds, and noted the system held about 18 pounds.

    I think they are off or my calculations are off?

    On the name plate it sais 164 Oz for the outdoor section. On the plate it also sais to add the amount of liquid line accordingly.

    I am not sure if this is a decimal or not? 0.6 and 0.4?

    Add 0.6 oz per foot for 3/8 inch OD liquid line. Add 0.4 oz for 1/4 inch OD. My pipe measures 3/8 inch close to 1/2 inch OD.

    Total liquid line pipe from just where it leave the outside unit to the Evaporator is 32 feet.

    That adds up to just under 10 pounds total of R22. With a 2 pound leak per year that is about 20% for that one year.

    If that is 6 oz per foot rather than 0.6 oz per foot, then were talking a little over 21.68 pounds. About 9% a year which is still not good but better than 20%.

    I put in about 6-8 oz this year.

    I also noticed the shraeder core may be bad because it does leak small amounts for a few seconds then it just stops so maybe over the winter when it shrinks a bit it may leak from there? The cap is on so not sure how much can leak from there with the cap that has an O-ring on the inside.

    I have a core remover tool that will allow me to replace it without loosing refrigerant.


    There was one time I was sure I purged the hoses and manifold but there could have been a moment I did not purge the line from the tank to the manifold. This is where I might have gotten the smallest amount of air in the system.

    The head pressures seem fine about 250 PSIG and the superheat seems ok about 11 degrees.

    What would the smallest amount of air in the system do? Would it be indicated on the pressure gauge or would a small amount go unnoticed for a short period of time then cause trouble later on, acid build up?

    This is why I prefer to put in drier or just do as you say recover, evacuate , pressurize with nitrogen and look for the leak. I will eventually install a drier

  6. #45
    Join Date
    Jan 2002
    Location
    Ft.Worth,Tx
    Posts
    4,584

    Thumbs down DIY Or Rookie tech.

    LOL

    What a joke, must be something in the air he's breathing around all the DNA and video machines he works with.

    If your so sure you idea will work for you then Do It.

    No one here really gives a ****.

    Now you get a life as something other than a hacker trying to fix your own HVAC.
    "Everyday above ground, is a good day".
    "But everyday that you have made a difference in someones life, may insure you stay above ground a little longer".<aircooled>

  7. #46
    Join Date
    Feb 2006
    Location
    Tn.
    Posts
    1,344
    Quote Originally Posted by aircooled53 View Post
    LOL

    What a joke, must be something in the air he's breathing around all the DNA and video machines he works with.

    If your so sure you idea will work for you then Do It.

    No one here really gives a ****.

    Now you get a life as something other than a hacker trying to fix your own HVAC.
    What a hard head
    Some of the things he says are ridiculous.

    Good luck on your journey.Wear safety glasses and gloves.
    This whole thread is silly .
    18 pounds on a 3.5 ton. I doubt it

  8. #47
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,090
    Quote Originally Posted by havactech View Post
    .

    I think they are off or my calculations are off?

    Probably both you and them are off.

    On the name plate it says 164 Oz for the outdoor section. On the plate it also says to add the amount of liquid line accordingly.

    I am not sure if this is a decimal or not? 0.6 and 0.4?

    Its a decimal point.

    Add 0.6 oz per foot for 3/8 inch OD liquid line. Add 0.4 oz for 1/4 inch OD.

    My pipe measures 3/8 inch close to 1/2 inch OD.

    Total liquid line pipe from just where it leave the outside unit to the Evaporator is 32 feet.

    Factory charge usually includes the first 15 foot of line set.

    32-15=17, 17*.6=10.2ozs.
    164+10.2=174.2, 174.2/16=10.89 pounds.

    Not really close to 18 pounds.


    I put in about 6-8 oz this year.

    On a system that has a proper operating charge of 10 pounds, you wouldn't even notice a 6 to 8 oz loss of charge.

    I also noticed the schrader core may be bad because it does leak small amounts for a few seconds then it just stops so maybe over the winter when it shrinks a bit it may leak from there? The cap is on so not sure how much can leak from there with the cap that has an O-ring on the inside.

    I have a core remover tool that will allow me to replace it without loosing refrigerant.

    The head pressures seem fine about 250 PSIG and the superheat seems ok about 11 degrees.

    Need to know indoor and outdoor ambient operating conditions for those readings to have any meaning.

    What would the smallest amount of air in the system do? Would it be indicated on the pressure gauge or would a small amount go unnoticed for a short period of time then cause trouble later on, acid build up?

    A lot of systems out there have had a small amount of air introduced from the gauge set. Running years later.
    No one can give an exact amount of air to stop the system from working.


    This is why I prefer to put in drier or just do as you say recover, evacuate , pressurize with nitrogen and look for the leak. I will eventually install a drier

    Your misunderstanding of how additional charge is determined. Is just one of many reasons we say people should not attempt DIY repairs of their systems.

    Even the small things cans mess up a good system.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  9. #48
    Join Date
    Sep 2003
    Location
    Portland.OR
    Posts
    313

    dirty wet freon at your place....

    If it works dont screw with it!!

    do you think dirt has gotten inside??

    Just smile till it breaks....

    My system..has developed a leak....now to fix my own problem...
    where does the weekend go.....

  10. #49
    Join Date
    Aug 2008
    Posts
    79
    Thanks beenthere for clearing that up. I am taking more advanced classes this winter. I have the money for a newer R22 system since mine is near its end. However I am not sure if I have the cash for an R410A system.

    Since the R410A system runs under much higher pressure than a R22 system would there not be more of a chance for leakage over time?

    I plan on practicing on my own unit and working part time for very small company. One of the tech's will be showing me tips during the procedure for recovery, evacuation and if needed pressurizing and leak testing then charging.

    So if something does screw up at least its on my own system.

    Like I said I purged the hoses on the manifold but don't remember if I purged the yellow one. Just the blue and red so there is a chance I might have introduced air from the disposable tank to the manifold?

    LAST QUESTION:

    Lets say there is a small amount of air. Air would be considered a non condensable gas correct? At what point would this air leave the system during recovery? In the beginning, middle, end of the recovery or would it just remain in the system? In other words this air can only be removed with a vacuum?

    Thanks again

  11. #50
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,090
    The air may come out during recovery.
    But you would still need to vacuum the system to get the moisture out that was in the air.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  12. #51
    Join Date
    Sep 2008
    Location
    arlington, tx
    Posts
    225
    this thread is so ridiculous it has to be fake! and btw loosening the red and blue hoses doesnt purge your manifold...and no part of recovering the gas removes the air...the moisture goes into the tank along with the refrigerant so your 22 is still contaminated...and moisture is not the systems problem it is the operator
    Last edited by mechanicalgsxr; 09-07-2008 at 09:52 PM. Reason: error

  13. #52
    Join Date
    Aug 2008
    Posts
    79
    Then what is the correct procedure for purging the hoses and manifold?

    I can see how the operator can introduce a contaminant but what do you mean by its the operator's problem and not the system? I have to disagree with you that its only an operator's problem. A Low pressure centrifugal system normally operates below atmosphere. Air can be introduced into the system without the presence of any operator!!

Page 4 of 6 FirstFirst 123456 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event