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  1. #66
    Join Date
    Jan 2010
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    [QUOTE=AIRCON8;2583244. and with a good leak detector you'll find it.[/QUOTE]

    How ironic !

  2. #67
    Join Date
    Aug 2018
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    Piedmont Triad, NC
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    So, if a system says it’s rated for 250lb on low side and 450lb high side, we should just shoot 600lb in the whole thing and complain if it fails?

  3. #68
    Join Date
    Aug 2002
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    Southold, NY
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    Quote Originally Posted by Achso017 View Post
    So, if a system says it’s rated for 250lb on low side and 450lb high side, we should just shoot 600lb in the whole thing and complain if it fails?
    No
    R-410A systems want 600#’s Standing test pressures.

  4. #69
    Join Date
    Aug 2018
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    Piedmont Triad, NC
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    Quote Originally Posted by pecmsg View Post
    No
    R-410A systems want 600#’s Standing test pressures.
    But the manufacturer is saying not to do that.


    Sent from my iPhone using Tapatalk

  5. #70
    Join Date
    May 2018
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    FLORIDA
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    Quote Originally Posted by Achso017 View Post
    But the manufacturer is saying not to do that.


    Sent from my iPhone using Tapatalk
    So according to Bosch i was 150 PSI over
    not gonna change my mind, 250 psi
    period
    Visit our website at www.airconcomfortcooling.com

  6. #71
    Join Date
    Aug 2018
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    Piedmont Triad, NC
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    To be fair, I don’t think pecmsg, vtp, or rider is wrong. They’ve got a lot more experience and knowledge then me and I respect their opinion. It’s not unusual to see r410a systems with over 400 psi of pressure on them. And I’ve heard from numerous people that Mitsubishi wants a 24hr pressure test at 600psi. I don’t honestly know what is the best overall pressure to test at. I usually test at 150 for r22 and 350 for r410a. My regulator doesn’t even go to 600 so I guess I can’t install any mitsu’s


    Sent from my iPhone using Tapatalk

  7. #72
    Join Date
    May 2018
    Location
    FLORIDA
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    LOL
    not needed 600 psi for a 2 ton LOL
    Visit our website at www.airconcomfortcooling.com

  8. #73
    Join Date
    May 2014
    Location
    Bay Area California
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    At what point is more pressure / tonnage required?

    A three ton?

    Maybe a 3.5 ton?

    Inquiring minds need to know.


    Quote Originally Posted by AIRCON8 View Post
    LOL
    not needed 600 psi for a 2 ton LOL
    I do a triple evac with nitro to remove non condensables.

  9. Likes R600a liked this post.
  10. #74
    Join Date
    Jul 2019
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    Oklahoma home its in the name
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    Maby 200#/ton

    Sent from mars using Tapatalk

  11. #75
    Join Date
    Jul 2019
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    Oklahoma home its in the name
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    I think you should stay under the pressure that you would get when your condenser fan quits and the compressor goes out on over temp limit.

    Sent from mars using Tapatalk

  12. #76
    Join Date
    May 2018
    Location
    FLORIDA
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    i keep pressurize at 250 psi LOL

    Quote Originally Posted by R600a View Post
    I think you should stay under the pressure that you would get when your condenser fan quits and the compressor goes out on over temp limit.

    Sent from mars using Tapatalk
    Visit our website at www.airconcomfortcooling.com

  13. #77
    Join Date
    May 2014
    Location
    Bay Area California
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    Oh. I just got that. I was likely speed reading before.

    You pulled a funny. And yes, that is funny !!

    Maybe I'll use that as a test question for the guys I work with. Or new hires; yeah, that might be better.

    I had a thread on here with all sorts of bogus test questions, but I think it got lost when this site's server crashed. It was three pages of hilarious questions. Questions that only a senior tech would be able to see through. Wonder if that thread is still around?


    Quote Originally Posted by R600a View Post
    Maby 200#/ton

    Sent from mars using Tapatalk
    I do a triple evac with nitro to remove non condensables.

  14. #78
    Join Date
    Jan 2020
    Location
    Portland Oregon
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    90
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    I always feed through both high&low sides equally, then close off nitrogen feed. If you plan on leaving the system pressurized overnight, disconnect gauge manifold & place a stubby gauge on the system to ensure gauges aren’t leaking (just a 1/4” female gasketed fitting w/ schrader depresser leak-lock threaded directly to a high side gauge).

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