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Thread: 40-50 degree ambient subcooling

  1. #21
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    Okay....so you should have enough gas in the system and your receiver gauges seem accurate.

    So if you have enough gas and only some of the overall cases are warm then you likely have some kind of problem on those circuits. And not at the rack.

    How many circuits are effected? How many cases on the circuits?

    Has anyone done an oil change on the rack recently? What is the superheat at each evaporator on the cases that are warm?



    Quote Originally Posted by Jbtone73 View Post
    So I pumped down the rack and it came up to 100 percent and then I opened it back up. It is a low temp rack and I would say about 25percent of the cases were not at setpoint with half of that 25 percent temping high. I have a mechanical receiver gauge that controls a magnetic gauge that your acre on. I checked the magnet and it’s working and also there is a digital receiver level that alarms below 15 percent receiver. It is a mechanical arm that has a digital read out either open or closed. So there’s two. And they both were reading ok. I didn’t close any of the circuits off. It’s a novar control system and a kysor warren rack.


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  2. #22
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    Ok...so the VFD controls a fan or fans. One fan? Two fans? All the fans?

    How big is the condenser as in how many fans? Double row? Single row?

    Still didn't answer whether it can split or not...
    Quote Originally Posted by Jbtone73 View Post
    Vfd is there to maintain a certain drop leg for the condenser. Really to control fan speed as the temperature outside drops. Kind of Like fan cycling except with variable speed instead of on or off.


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  3. #23
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    Quote Originally Posted by Jbtone73 View Post
    I’m just asking for help and Pecmsg is making it like I don’t have the makings of a varsity athlete. It’s a tremendous blow to my self esteem.


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    None of us are standing there with you so you need to give us all the info, otherwise garbage in, garbage out.

    And if you are uptight about what a bunch of strangers say on an internet forum, time to go off the grid.

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  4. #24
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    The comment is a refrence to a tv show I wasn’t serious. From the sopranos.


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  5. #25
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    It can split
    Also 8 fan condenser


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  6. #26
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    Double row


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  7. #27
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    Quote Originally Posted by Jbtone73 View Post
    The comment is a refrence to a tv show I wasn’t serious. From the sopranos.


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    you'll fit in just fine around here!! LOL!! apply for Pro membership!

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  9. #28
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    Not sure why you guys don't know what a DROPLEG is......maybe a regional thing?


    A drop leg is the final pipe connection leaving a condenser or receiver.

    on a receiver, it is usually a large diameter pipe that is much larger than the liquid line connected to it. on a condenser it can be the same, but is usually not as large as one on a receiver.

    On water cooled chillers, the liquid line from the condenser to the evap. is also referred to as a drop leg.


    A full drop leg tells you that you have a full liquid line.

  10. #29
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    Quote Originally Posted by 71CHOPS View Post
    Not sure why you guys don't know what a DROPLEG is......maybe a regional thing?


    A drop leg is the final pipe connection leaving a condenser or receiver.

    on a receiver, it is usually a large diameter pipe that is much larger than the liquid line connected to it. on a condenser it can be the same, but is usually not as large as one on a receiver.

    On water cooled chillers, the liquid line from the condenser to the evap. is also referred to as a drop leg.


    A full drop leg tells you that you have a full liquid line.
    I’m sure I heard the term before but I never use the term. Learn something new every day!
    “Happiness can be found, even in the darkest of times, if one only remembers to turn on the light.”
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