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  1. #1
    Join Date
    Mar 2010
    Location
    plano,IL
    Posts
    28

    Larkin condensors

    Just throwing this out there for you guys. Over the last year my company has installed 4-5 new walk in coolers. ( evaps, TXV, line sets and cond.)

    And every last one has had a bad headmaster right out of the gate. The latest one is a Larkin m: LHT050X60CFM, new style with the micro channel coil. Once everything is up and running my liquid side hangs about 140PSI on a 180 valve. Check condensor coil and half is warm and half is cool. ( 24lbs of 404-a) Site glass flashing a bit. Add a fan cycler and of course glass clears during fan off. Fan cycles on glass remains clear. Ambient was 30*

    We have done this a few times like I said til we can get a new head master, new valve diverts flow as needed and maintains the 180... Just wondering if anyone else has been having these issues right out of the gate.

  2. #2
    Join Date
    Mar 2009
    Location
    Mid-Mo
    Posts
    3,596
    Interesting. What brand valves??

  3. #3
    Join Date
    Mar 2010
    Location
    plano,IL
    Posts
    28
    Sporlan OROA-5-180

  4. #4
    Join Date
    May 2003
    Location
    Utah
    Posts
    735
    From my experience in working for the valve company in question and being in the industry for nearly 40 years......almost without exception when someone finds multiples of the same component all failing on startup, there is normally some other explanation besides it being a defective component.

    Just saying.....

  5. #5
    Join Date
    Jul 2006
    Location
    Anytown USA
    Posts
    2,062
    How are you coming up with the additional charge to flood the condenser using the microchannel coil?

  6. #6
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,851
    Quote Originally Posted by bunny View Post
    From my experience in working for the valve company in question and being in the industry for nearly 40 years......almost without exception when someone finds multiples of the same component all failing on startup, there is normally some other explanation besides it being a defective component.

    Just saying.....
    This makes a LOT of sense.

    One failure? Yeah, it happens. Multiple failures? Something fishy is going on.

    Quote Originally Posted by y7turbo View Post
    How are you coming up with the additional charge to flood the condenser using the microchannel coil?
    I know that Heatcraft published a chart that just gave a flooding charge value for their microchannel coils.

    I suppose that Larkin would, too.

  7. #7
    Join Date
    Dec 2000
    Location
    Flat Rock, NC
    Posts
    463
    It does sound like system charge is the culprit. You must charge to full sight glass then add additional chagrge for low ambient operation. If sight glass was not full then there was not enough charge to flood condenser which would then lower condenser pressure below valve setting. I must admit that 24 lb is about what I normally charge that size unit when lines are under 50'.

  8. #8
    Join Date
    Mar 2009
    Location
    Mid-Mo
    Posts
    3,596
    Quote Originally Posted by jpsmith1cm View Post
    This makes a LOT of sense.

    One failure? Yeah, it happens. Multiple failures? Something fishy is going on.



    I know that Heatcraft published a chart that just gave a flooding charge value for their microchannel coils.

    I suppose that Larkin would, too.
    I thought Larkin was Heatcraft?

  9. #9
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Flashing glass = big red flag.

  10. #10
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,851
    Quote Originally Posted by ryan1088 View Post
    I thought Larkin was Heatcraft?
    I can't keep track of who is who.

    Bohn is Heatcraft, I know.

    Other than that, I write down the numbers and somebody else deciphers who owns who and who supplies what parts.

  11. #11
    Join Date
    Jul 2006
    Location
    Anytown USA
    Posts
    2,062
    Quote Originally Posted by jpsmith1cm View Post

    I know that Heatcraft published a chart that just gave a flooding charge value for their microchannel coils.

    I suppose that Larkin would, too.
    In sure they do JP. Lets see how the OP calculated the charge.

  12. #12
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,751
    Larkin is also Heatcraft. Their nameplates need special deciphering
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  13. #13
    Join Date
    Jul 2005
    Location
    Phoenix, AZ
    Posts
    266
    Heatcraft owns Bohn, Larkin, Climate Control, and Chandler. Check the flooded charge.

    Sent from my DROID RAZR using Tapatalk 2

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