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  1. #1
    Join Date
    Aug 2008
    Posts
    5

    Another newbie R22 / R22a charging pressure question

    I have a slow leak in one of my units, a couple of lbs per year
    I have been getting help charging it and decided to get my own gauge.
    The inside green scale is labeled R22, it maxes out at 70 where the outside line reads 115

    I checked my unit that has never been recharged and it read approx 63 on the green and a little over 100 on the outside
    I put in 3 cans of R22a from Envirosafe and after the second can the water poured out the drain as the coils thawed. After the third can it read around 64green 104 outside line.
    Outside temp was approximately 97°F

    Neither unit is very cold inside, I don't have a thermometer to read the outlet air, but it cannot be much under 70, the house climbs into the 80s with AC on all the time, never drops to low 70's until around 4am.
    Are they both overcharged?
    The last guy who was a tech and serviced it complaineded that the new guys never charge these units high enough so they never really get cold.
    I assumed (yea I know) that if I matched the two, I would not overcharge the one I was working on.

    Both units were new with the house and are about 7 years old

    Your thoughts?

    thanks,
    hot in SC

  2. #2
    Join Date
    Jul 2008
    Location
    Alabama
    Posts
    658
    Read site rules. NO DIY!!!

    Sound like you screwed your unit up pretty bad.

    Call a professional to fix it. Let your fingers do the walking!

  3. #3
    Join Date
    Sep 2007
    Location
    Panhandle WV
    Posts
    47

    Thanks for the warning

    Isnt the Enviro-Safe actually R-290 (propane)?

    I'm sure I dont want any part of some HO brew of
    refrigerants in my recovery tank.

    You're on your own with this.

  4. #4
    Join Date
    Jul 2008
    Location
    Alabama
    Posts
    658

    you got serious troubles!!!!

    DON"T LIGHT A MATCH!!!!!

  5. #5
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,320
    Well, now that you really screwed up your system.
    Call a better company then you have been using. Since that old guy just charges by gauge pressure, instead of the right way.

    Be prepared for a big bill.

    Since you can't read and follow rules. you can't follow instructions on how to charge.

    Anybody in their right mind, would charge by vapor pressure only on a standard conventional system.
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    How many times must one fix something before it is fixed?

  6. #6
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,320
    More is better. If 2 cans made it cold, 3 cans will really make it cold. NOT
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    How-to-apply-for-Professional

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

  7. #7
    Join Date
    Aug 2008
    Posts
    5
    OK, so I matched the pressure from the other unit, which pro did last 6 yrs, addding until coils thawed and water drained, same as he did, and I screwed it up how?

    Considering these guys have ALWAYS had to come out twice to pressure it back up after the first call, making the expensive first call more

    Again, they are both Comfortmaker 10's, both pressures match (one never being serviced), the air is MUCH better now, but still not as great as when the one guy pressurized the hell out of it.

    I understand you guys hate DIY, but it's already been DIY'd, do you actually know what the low side pressure should be?

    3 cans made the pressures match

    and there is no other place that hit's this side of town
    Last edited by ctgblue; 08-07-2008 at 12:40 PM.

  8. #8
    Join Date
    Jul 2008
    Location
    Alabama
    Posts
    658
    Maybe you should have put in 4 cans!!

  9. #9
    Join Date
    Jul 2008
    Location
    Alabama
    Posts
    658
    It ain't about matching pressures dummy!

    Its about doing it right!!

    If you or the other guys don't have a clue, leave it the hell alone!!

    Call a contractor before you blow your house up!

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