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Thread: Help

  1. #21
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    Quote Originally Posted by VTP99 View Post
    When you looked up the box load did it included glass doors ? I haven't looked at that yet.
    That was just the box!

  2. #22
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    As icemeister said, Run just one cond unit only, As a test.Now, in an empty box ,the air in the w/i would not intermingle and be pretty darn close to even temps on both ends of the w/i ????? As a test.

  3. #23
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    Quote Originally Posted by pecmsg View Post
    That was just the box!
    So I'm guessing about an additional 1000 btu/hr. additionally needed per door.
    Puts him at around 30,000 total. Using heavy load figures seeing doors opening and closing.

  4. #24
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    Quote Originally Posted by VTP99 View Post
    So I'm guessing about an additional 1000 btu/hr. additionally needed per door.
    750 - 800 per.

  5. #25
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    Quote Originally Posted by pecmsg View Post
    750 - 800 per.
    Think I saw 1060 per your posted pdf.

  6. #26
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    Quote Originally Posted by VTP99 View Post
    Think I saw 1060 per your posted pdf.
    Thats an old chart. Doors are much better today!

  7. #27
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    Quote Originally Posted by pecmsg View Post
    Thats an old chart. Doors are much better today!
    I agree but do we know what kind of doors he's using ? New vs used (old). we just discovered he's got doors. Wonder if there's any other surprises ?

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  9. #28
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    Quote Originally Posted by pecmsg View Post
    Thats an old chart. Doors are much better today!
    What if they're old doors?

    Or cheap, foreign doors? I shop at a local supermarket that has frozen food glass door cases that are no more than ten years old, made in Brazil and I can feel the radiant heat from the doors from 6 feet away.

  10. #29
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    Quote Originally Posted by icemeister View Post
    What if they're old doors?

    Or cheap, foreign doors? I shop at a local supermarket that has frozen food glass door cases that are no more than ten years old, made in Brazil and I can feel the radiant heat from the doors from 6 feet away.
    If he had those doors he probably wouldn't have high RH issues

  11. #30
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    Quote Originally Posted by jmlandru View Post
    (2) 3.5 HP condensing units. Scroll.
    We don't use HP in refrigeration. I'll go ahead and estimate that at 12,000 x 7 = 84,000 - 33 % = 56,280 btu/hr.
    Yep, still looks oversized. Oh wait, it's not made with 2x4 walls is it ?

  12. #31
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    A possible solution here is to increase the design TD of the evaporators. If the system balance shows that the current TD less than 10F TD, then the RH would naturally be high, even if the systems weren't oversized. In this case, we can reduce the TD to offset the effects of being oversized by creating a higher TD.

    Try shutting off one of the fans on each evaporator temporarily to see if the RH improves. A long-term solution would be to change or modify the fan blades to reduce the airflow or install a fan speed controller.

    This will cause the system to run at a lower suction pressure and so there will be a net loss of capacity, but it doesn't appear that would be a problem.

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  14. #32
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    Thread Starter
    Brand new AI 401 doors with heated glass and LED's. It was suggested by the installer to disconnect 1 fan per evap and block the coil section with plexi or something. Every condensing unit we sell is rated by HP. Brand new foamed in place wood pramed panels, 3-1/2" thick.

  15. #33
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    But we need to know the capacity of the condensing units.
    A 1HP compressor can result in 3 different capacities depending on application ( ie. High, Medium, or Low temperature ). So you can see where that tells us nothing.
    How about you give us the condenser make & model #'s and the evaporator #'s as well.
    "HELP" us help you.

  16. #34
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    Thread Starter
    29' X 10' X8' High walk in display cooler- no floor

    (11) Anthony 401 glass display doors- size 30" x 79"

    (2) Russell Model RFO300E4SEA scroll condensing units, medium temp, 28,420 BTUH @ 95* Ambient

    (2) Russell Model AA56-245BAE Evaporators

  17. #35
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    That looks like a close match.
    Is the concrete floor new or existing ?

  18. #36
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    It is fairly old. I don't think that is the source of the humidity.

  19. #37
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    Quote Originally Posted by jmlandru View Post
    Also that the slab it is on had an issue with being wet.
    Please explain.

  20. #38
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    The installer said that there were wet spots on the slab when he started. Found out there was a roof leak that was repaired months ago.

  21. #39
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    Quote Originally Posted by icemeister View Post
    This depends on how the evaporator are piped. Most coolers that I've seen and installed that have four evaporators and two condensing units have the evaporator interlaced so every other evaporator is on the other system.

    If your's are not piped this way, it's not usually a major job to repipe them so they can be staged without one end of the box being warmer than the other.
    Hos 4:6 My people are destroyed for lack of knowledge. Because you have rejected knowledge, I will also reject you, that you may be no priest to me. Because you have forgotten your Gods law, I will also forget your children.


    "You've got to Stand for Something or You'll fall for anything" (A. Tippin)


    Mat_15:24 But he answered, I wasnt sent to anyone but the lost sheep of the house of Israel.

  22. #40
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    Quote Originally Posted by VTP99 View Post
    I agree but do we know what kind of doors he's using ? New vs used (old). we just discovered he's got doors. Wonder if there's any other surprises ?
    Hos 4:6 My people are destroyed for lack of knowledge. Because you have rejected knowledge, I will also reject you, that you may be no priest to me. Because you have forgotten your Gods law, I will also forget your children.


    "You've got to Stand for Something or You'll fall for anything" (A. Tippin)


    Mat_15:24 But he answered, I wasnt sent to anyone but the lost sheep of the house of Israel.

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