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  1. COULD BE BAD MOTORS

    COULD BE BAD MOTORS
  2. Replies
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    729

    I don't work on supermarket racks. But on a few...

    I don't work on supermarket racks. But on a few parallel racks I've seen where you have a 10hp, then 15hp, then 20hp, it will short cycle a bigger compressor if the smallest compressor isn't...
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    338

    Sounds like txv working ok to me. Are all...

    Sounds like txv working ok to me. Are all circuits in the evaporator frosting or just a few? That could cause coil to partially freeze up.

    Assuming entire coil is feeding properly, the 2 to 10...
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    1,379

    Yes that makes sense. Sounds more like a...

    Yes that makes sense. Sounds more like a potential issue of slugging at start up rather than flooding while running. Makes sense, thanks for the clarification!
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    1,379

    Good point, never even crossed my mind. Might a...

    Good point, never even crossed my mind. Might a crankcase heater be beneficial in this scenario?
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    1,379

    Hmmmm... I don't think I would've done it like...

    Hmmmm... I don't think I would've done it like that, you always want liquid moving downhill through condenser... but I guess if it works, it works?
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    1,379

    AWESOME.

    AWESOME.
  8. Replies
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    1,379

    Ice, your testimony gives me confidence to start...

    Ice, your testimony gives me confidence to start using the cap tube sizing program. Actually makes me want to double check a lot of manufacturers specs too!

    PHM: I agree with you 100 percent. ...
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    txv... txv... txv... :) I love this kind of...

    txv... txv... txv... :) I love this kind of project, I envy you right now. But I'm worried, just visualizing in a week hearing you say "compressor too hot, too much superheat, had to shorten the...
  10. Replies
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    Every evaporator I've ever seen feeds into the...

    Every evaporator I've ever seen feeds into the inside layer, then the outside layer that the return air hits is piped to suction header.

    In addition, water cooled condensers are also piped cross...
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    If there's one thing you REALLY need to do right,...

    If there's one thing you REALLY need to do right, it's sizing the cap tube. Guessing is not going to cut it. You could always just throw in a txv, too.
  12. Replies
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    When the ambient air is pulled in to the coil it...

    When the ambient air is pulled in to the coil it is at say 80*f. After passing through let's say it's at 100*f. So if the discharge gas is at 120*f then it can still transfer heat with 100*f air. ...
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    Coldest air should hit coldest refrigerant. So...

    Coldest air should hit coldest refrigerant. So it should start with back coil, then run through front coil. That's how multi layer coils are usually piped
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    I'd redo it so you feed the original coil first,...

    I'd redo it so you feed the original coil first, then out of that coil into the new front coil.

    Would be even better if you could put them side by side with fans on each.
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    I can tell you what's going on, the tech made a...

    I can tell you what's going on, the tech made a good effort by replacing the condensing unit on an old Traulsen, but he failed by not converting it to TXV, and he should have also cut out hot gas...
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    They're really pretty simple. If head pressure...

    They're really pretty simple. If head pressure is above setpoint on valve, it should not bypass hot gas into receiver. If head pressure is below setpoint then it should bypass.

    In your case...
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    (hands customer $3500 invoice) yep yer fan motor...

    (hands customer $3500 invoice) yep yer fan motor went out, but don't worry you won't have to worry about that happ'nin e'er again. what happened to yer yard? oh well
  18. Replies
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    correct, in a previous post you also said it was...

    correct, in a previous post you also said it was a 6 ton unit, yet the evaporator models numbers makes it sound closer to 2 tons.
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    If the evaporators have functioning electric...

    If the evaporators have functioning electric defrost, this ups your allowable run time to something like 20-22 hours a day, so that would be beneficial to get it working again.

    Keep in mind it may...
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    Consider asking the employees (not manager they...

    Consider asking the employees (not manager they will deny) Has it EVER worked right?

    How big is this walkin? Consider that somebody replaced that condensing unit very recently..maybe others have...
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    I think he's trying to stimulate your mind. In a...

    I think he's trying to stimulate your mind. In a system with a clear sightglass, adding refrigerant would only raise the level of liquid in the receiver and would not change pressures; that is,...
  22. Thread: True LAE

    by trippintl0
    Replies
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    335

    499421 Set FCM paramater to NON and the evap...

    499421

    Set FCM paramater to NON and the evap fan will always run even when compressor cycled off.
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    Maybe the defrost timer is broken?

    Maybe the defrost timer is broken?
  24. Thread: True LAE

    by trippintl0
    Replies
    9
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    335

    I have it, but I'll have to get it tomorrow and...

    I have it, but I'll have to get it tomorrow and reply back. There's two ways to do it. I got the info by emailing LAE and they gave me the full PDF for the controller. This has proven very...
  25. We have added water cooled condensers AFTER the...

    We have added water cooled condensers AFTER the air cooled condensers then back into receivers. This way, if air cooled condenser is capable of keeping head pressure below regulating valve setpoint,...
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