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  1. #14
    Join Date
    Oct 2009
    Location
    new jersey
    Posts
    246
    I have flared the pipe many times with the same old flaring. I use spittle leaklock. Never had a problem.you need to ream the pipe carefully.

  2. #15
    Join Date
    Sep 2004
    Posts
    116
    i cut all the flares off and braze. Mitsubishi wants a 45o flare. once and a while we get a leaker at condeser flare connection, thats operator error. I love these mini-splits. If they made a flush mount for residential, i wouldnt install ductwork ever again! I put a Mitsubishi Hyper heat unit in my 24 x24 garage.heats it to 70 at 5o. sweet.

  3. #16
    Join Date
    Dec 2005
    Location
    Cincinnati, Oh
    Posts
    5,015
    Quote Originally Posted by knave View Post
    What do you do with the xtra lineset???
    horizontal loops. Or, braze in a coupling if you have to.

    You still use the factory flares.
    "Better tell the sandman to stay away, because we're gonna be workin on this one all night."

    "Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."

    "Just get it done son."

    Dad adjusted

  4. #17
    Join Date
    Sep 2008
    Posts
    582
    Agreed that the evaporators are a PITA but the flare's are not a problem.

    Start with a good flare tool (I use and like YJ 60278), a clean cut, deburr ends, clean & oil cone, oil back side of flare, use flair wrenches (I'm not good about that) you will have perfect flairs that are leak free. Don't forget that damn nut first and don't overtorque it.

  5. #18
    Join Date
    Nov 2001
    Location
    Seattle, WA
    Posts
    7,760
    Quote Originally Posted by CoolWine View Post
    Agreed that the evaporators are a PITA but the flare's are not a problem.

    Start with a good flare tool (I use and like YJ 60278), a clean cut, deburr ends, clean & oil cone, oil back side of flare, use flair wrenches (I'm not good about that) you will have perfect flairs that are leak free. Don't forget that damn nut first and don't overtorque it.
    My distrubutor says there is a recommended flare nut torque wrench now on the market for these units but he could not find any in stock. I'm told they are now easy to find under the Fuj accessories or something like that.

    Next system I'm doing I'm going to get that torque wrench.
    "The American Republic will endure until the day Congress discovers it can bribe the public with the public's own money.
    - Alexis de Toqueville, 1835

  6. #19
    Join Date
    Jan 2009
    Location
    Indiana
    Posts
    3,228
    Quote Originally Posted by DeltaT View Post
    My distrubutor says there is a recommended flare nut torque wrench now on the market for these units
    good to know, Different installers give it a different twist.
    some not enough and afraid to damage and others to much and strip it.

  7. #20
    Join Date
    Dec 2002
    Location
    in a house, Appomattox, Va.
    Posts
    3,293
    We've had leaks too. right now I'm the only one at co that owns the special flare kit. skipped getting the torque wrench since thought could get crows feet and use my torque wrench at home.
    seems the flare nuts I took w/ me to get right size didn't fit any of the crows feet at store. Another $80 for kit just to torque flare nuts on minisplits?
    Col 3:23


    questions asked, answers received, ignorance abated

  8. #21
    Join Date
    Dec 2007
    Posts
    4,703
    our comp has the "special" kit and still can't get it right.

    I have seen that torque wrench and did not quite get its use.

    size of the flare nuts is weird and I have posed that question before for oil flare nuts. seems there is more than one type of flare nut and they are sized differently. I have both metric and standard flare wrenches and rarely have the exact size to fit the nuts out there.
    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

  9. #22
    Join Date
    Dec 2003
    Location
    Sugar Land, Tx
    Posts
    123
    We cut off at the evap as well and solder. I have not had any problems flaring em though my guys kept getting leaks at condensers. Started having them buy pre flared solder fittings at Johnson Supply. Cured that.
    I keep telling them to use the oil while flaring if not it creates a stereophonic groove in the copper.
    Techson Mechanical LLC
    "We Shall Mount Up Wings As Eagles"

  10. #23
    Join Date
    Mar 2012
    Location
    West Chester, PA
    Posts
    511
    No drier allowed = no brazing allowed = flare fitting required
    that being said, I have brazed more than few

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