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  1. #14
    Join Date
    Oct 2009
    Location
    Raleigh, NC
    Posts
    799
    Quote Originally Posted by EEAllen View Post
    it's a very very rare case, even if the lines are not properly secured to the wall or other stuff around, the vibration shouldn't be strong enough to cause such an abrasion from over time.
    I strongly disagree! I had THREE rubthroughs last week on different condensing units (main piping), and TWO pressure control lines rubbed through. Yesterday I found a Lennox L-series where the discharge line from stage one compressor rubbed through on the tail of the crankcase heater worm clamp from the stage 2 compressor. I also had an evap fan wire in a unit cooler that had rubbed through and shorted.

  2. #15
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,638
    Quote Originally Posted by MicahWes View Post
    I strongly disagree! I had THREE rubthroughs last week on different condensing units (main piping), and TWO pressure control lines rubbed through. Yesterday I found a Lennox L-series where the discharge line from stage one compressor rubbed through on the tail of the crankcase heater worm clamp from the stage 2 compressor. I also had an evap fan wire in a unit cooler that had rubbed through and shorted.
    If you read the rest of the post you quoted, it appears he doesn't like to pull vacuums either
    Officially, Down for the count

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  3. #16
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Quote Originally Posted by EEAllen View Post
    it's a very very rare case, even if the lines are not properly secured to the wall or other stuff around, the vibration shouldn't be strong enough to cause such an abrasion from over time. I would say the lines they used when it was installed were already damage in that portion, and with overtime abrasion, it rubbed out a hole. But yea for better result, I would cut it, although that takes alot more time when you have to vacuum, and recharge the system
    :0

  4. #17
    Join Date
    Jul 2012
    Location
    North west Arkansas
    Posts
    86
    Quote Originally Posted by 2sac View Post
    OP, It's common where linesets are not properly secured. Many times when the LLS energizes, the initial jolt of refrigerant going thru the line will cause a vibration.Also common when installers use use precharged linesets and stack the leftover coils on the roofs, on top of the box, or in the celing.
    Yep, seen precharged line sets just hanging still coiled above ceiling, coiled line rubbing against itself.

  5. #18
    Join Date
    Jan 2007
    Location
    Pittsburgh
    Posts
    181
    Yep see that alot...sometimes not easy to find..

  6. #19
    Join Date
    Oct 2008
    Posts
    797
    Quote Originally Posted by coolerguy View Post
    Yep see that alot...sometimes not easy to find..
    Yup... like the lineset I had in a Jim 'n Nick's, suspended between top of W/I and roof of building (the attic) in a coil - accessible ONLY by ladder through the ONLY possible ceiling tile that could get me there - above another W/I's door they could only NOT use at 6am - an hour before the crew came in.
    .
    Once up there, access required traversing, ducking & crawling by flashlight through something worse than a typical attic for about 30'.

    Got to the coiled & dangling copper tubing of a system installed only a month ago, to find the lineset virtually rubbed right through each other.

    I (or my company) didn't do it.

    That lineset was worthy of a Wall of Shame post.

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