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  1. #1
    Join Date
    Dec 2007
    Posts
    4,718

    can't pull/hold vacuum

    Bought 2 Appion core tools, BluVac, 1/2" Appion hoses and cannot get below 2000 microns on a 2.5 ton resi split.

    Came home and nothing holds vacuum!!!!!

    Right now had hose with vac pump on 3/8" and BluVac on 1/4" end, blank off pump with 80 microns and soars quickly with no end in sight.

    Basically same with other hose, both CRTs and the metal vac connection piece.

    It could be the blank off on the pump, but tried manifold, regular hoses and no difference.

    And I am using Nylog.
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
    from an excerpt by Paul Jacob in Sun City, AZ

  2. #2
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    6,964
    On a system in the 1200-2000 range you will see a holding pattern depending how jacked up it has been previously IMO. POE systems are even worse. From what I've seen once you clear 1100-1000 it gets a steady drop again. The thing that I noticed with other gauges is in that range most will pull right thru it and some will show no rise even when there is. Expect some extra time if your gonna do it by the book now that you have an excellent micron gauge. You're simply not going to pull a XX second vacuum on a typical system HTH
    “If You Can Dodge A Wrench You Can Dodge A Ball”

  3. #3
    Join Date
    Dec 2007
    Posts
    4,718
    Quote Originally Posted by itsiceman View Post
    On a system in the 1200-2000 range you will see a holding pattern depending how jacked up it has been previously IMO. POE systems are even worse. From what I've seen once you clear 1100-1000 it gets a steady drop again. The thing that I noticed with other gauges is in that range most will pull right thru it and some will show no rise even when there is. Expect some extra time if your gonna do it by the book now that you have an excellent micron gauge. You're simply not going to pull a XX second vacuum on a typical system HTH
    What about the inability to get a low vac on just the components themselves NOT connected to a system?
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
    from an excerpt by Paul Jacob in Sun City, AZ

  4. #4
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    6,964
    My pump will only pull 50-60 unless its real fresh oil and even then its not much lower for very long. Other gauges will show very low hooked like this from what I've seen plus they hang down there if your watching for a rise some will even drop ... You too?? Do you have a different gauge to compare?
    80 doesn't seem that bad plus these are new BIG hoses. Try and pull them down overnight to help knock the new out of them.
    “If You Can Dodge A Wrench You Can Dodge A Ball”

  5. #5
    Join Date
    Apr 2008
    Location
    Central CA
    Posts
    567
    Hook your blu vac to an empty recovery tank and it should pull down quickly and hold.
    It was probable leaking through the blank off valve testing it directly to the pump like that.

    I had a compressor changeout recently that wouldn't get below 2,000, it would just stall out.
    Broke the vac with nitro 2 times and still wouldn't budge, purged one last time and BAM dropped down to 300 no problems.

  6. #6
    Join Date
    Oct 2003
    Location
    las vegas
    Posts
    1,505
    i found the appion to take a few hours of a combination of vac. &
    using with refg. to off gas the material they are made of. been using them
    about 6 mo. now with no problems.

  7. #7
    Join Date
    May 2010
    Location
    Tennessee
    Posts
    360
    Quote Originally Posted by stomper56 View Post
    Hook your blu vac to an empty recovery tank and it should pull down quickly and hold.
    It was probable leaking through the blank off valve testing it directly to the pump like that.

    I had a compressor changeout recently that wouldn't get below 2,000, it would just stall out.
    Broke the vac with nitro 2 times and still wouldn't budge, purged one last time and BAM dropped down to 300 no problems.
    Pardon my ignorance, but when should one brake the vac with nitrogen, only when ur having problems droping the microns? Also what is the acceptable rise on your micron gauge, assuming you have no leaks?

  8. #8
    Join Date
    Jan 2002
    Location
    Fayetteville, NC
    Posts
    133
    Here's a pretty good article. Vacuum Training
    Supermarket Tech...and anything else the boss finds for me!

  9. #9
    Join Date
    Oct 2010
    Location
    The very humid south
    Posts
    723
    Welcome to the world of the BluVac!!!

  10. #10
    Join Date
    May 2010
    Location
    Tennessee
    Posts
    360
    [QUOTE=Txvman;13692221]Here's a pretty good article. Vacuum Training[/QUOT

    Thanks man!

  11. #11
    Join Date
    Dec 2007
    Posts
    4,718
    Quote Originally Posted by acsolutionsllc View Post
    Welcome to the world of the BluVac!!!
    ?
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
    from an excerpt by Paul Jacob in Sun City, AZ

  12. #12
    Join Date
    Jan 2002
    Location
    Fayetteville, NC
    Posts
    133
    OK, I got a question too! I built a vacuum rig to do better and faster vacuums. It consists of new Yellow Jacket 3/8 vacuum hoses and a three way distributor. Vacuum pump is only a few months old and oil had been changed. I pulled a vacuum on a Masterbilt three door dairy cooler and it took about an hour to get to 300 microns. I know that was NOT right! I brought the rig home, changed the oil and hooked it up to a 30# recovery tank. I pulled a vacuum to about 60 microns (JB DV-22N) for a couple of hours and then blanked off the vacuum pump. I plan on putting a hand valve or ball valve in-line in between the pump and distributor. It raised up to about 265 microns and seems to be holding. Is this good? What is this about new vacuum hoses "off gassing"?
    Supermarket Tech...and anything else the boss finds for me!

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