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  1. #1
    Join Date
    Feb 2017
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    Mitsubishi Multi City Install Questions.

    Hello all,
    I got a few questions about the indoor heads. PKFY-P06NBMU-E2R1
    Are these allowed to be brazed? Cant find any where were it says you cant. Also want to shorten the drain hose so I can fit the pump reservoir behing the unit. Got any ideas how to do this? Looks like the barbed fitting is glued to the drain hose. I am trying to mount these units without using any line hide. They will be going on interior walls so I was going to fish the lines down through a core above on the second floor. I would hate to have flared connection not accessible.

    Let me know your thoughts and thanks for the help.

  2. #2
    Join Date
    Aug 2002
    Location
    Southold, NY
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    No

  3. #3
    Join Date
    Feb 2017
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    Thread Starter
    Quote Originally Posted by pecmsg View Post
    No
    Okay guess I will be flaring. I remember them saying in the city multi class that you could braze. Maybe I miss understood.

  4. #4
    Join Date
    Feb 2017
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    Thread Starter
    All of my linesets will be brazed to my service valves on the bc.

  5. #5
    Join Date
    Aug 2002
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    Southold, NY
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    Check with the factory but every class Ive taken says NO.

    Remember there are fine screens everywhere that plugg easy.

  6. #6
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    Feb 2017
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    Thread Starter
    Quote Originally Posted by pecmsg View Post
    Check with the factory but every class Ive taken says NO.

    Remember there are fine screens everywhere that plugg easy.
    I do understand that but all the hard copper from the outdoor twinned units to the bc are all brazed. Also all 32 service valves are also brazed. We always purge nitrogen. Dont see it hurting anything if I braze the rest. Just my thought though. Thanks for your quick response.

  7. #7
    Join Date
    Jun 2014
    Location
    Dover, DE
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    The industry is beginning to favor brazing over flairing.
    Now take that with a grain of salt as it’s been about 10 years since my last C/M class, and I’ve primary been a Samsung rep since then. But Samsung has released braze only equipment, and they tell you that’s their preferred method of pipe connection.
    If you have ANY questions on VRF, call the manufacturer. Call them before you do whatever it is your unsure on. They are very proprietary and very picky about how things are done.
    I havent failed. Ive just found 10,000 ways that wont work. - Thomas Edison

    Its not whether you get knocked down, its whether you get up. - Vince Lombardi

    "In this house we obey the laws of thermodynamics" - Homer Simpson

    Local 486 Instructor & Service Technician

  8. #8
    Join Date
    Aug 2002
    Location
    Southold, NY
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    This is where I prefer Stay Brite #8 but thats another argument!

  9. #9
    Join Date
    Feb 2017
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    Thread Starter
    Quote Originally Posted by pecmsg View Post
    This is where I prefer Stay Brite #8 but thats another argument!
    Would you trust Stay Brite 8 with 600 psi 24 hour pressure test?

  10. #10
    Join Date
    Nov 2008
    Location
    Long Island NY
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    At my last shop they would braze and flow nitrogen. About 15 installations over the 2 years I was there and never had an issue.

    Sent from my SM-G965U using Tapatalk

  11. #11
    Join Date
    Aug 2002
    Location
    Southold, NY
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    Quote Originally Posted by NMTech View Post
    Would you trust Stay Brite 8 with 600 psi 24 hour pressure test?
    Absolutely!

    The copper will fail before the joint.

  12. #12
    Join Date
    Sep 2007
    Location
    edmonds wa
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    The Stay Brite specs tell the tale. Never leave home without it.
    UA Local 32 retired as of Jan 2020

  13. #13
    Join Date
    Feb 2017
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    Thread Starter
    Thanks for your responses. Any ideas on shortening the drain line. These Citi multi head drains extend the length of the head.

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