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  1. I believe it's a LT application because there is...

    I believe it's a LT application because there is a head fan installed.
  2. Frosted compressor w/ suction accumulator

    Hi guys,

    This is a theoretical question. It's not my installation.

    I took a photo of a compressor unit with suction accumulator installed.
    814468

    Why is the compressor frosted although...
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    They assumed the condenser fans would be noisy so...

    They assumed the condenser fans would be noisy so they installed the fan speed control to help out with the noise.
    In the end, the compressor is noisy. :(
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    4Pes-12Y Bitzer, R-404A. Evaporating temp - 22 F....

    4Pes-12Y Bitzer, R-404A. Evaporating temp - 22 F.

    Why fan speed? To reduce the noise of the condenser fans :grin2:
    The condenser is located outside of the machine room.
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    I was told the same thing today. I checked the...

    I was told the same thing today.
    I checked the compressor model in the Bitzer sw, the noise level seems to be "normal" for this compressor.
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    Guys, thanks a lot for your replies. I really...

    Guys, thanks a lot for your replies.
    I really appreciate them. I didn't have a chance to reply sooner.
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    Oil separator reduces noise?

    Hi guys.
    My customer has a pretty noisy unit with 12 HP semi-hermetic compressor installed in a room next to WIF.
    The condenser is located outside and condenser fans are controlled by fan speed...
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    Is it in the professional forum? I ask because I...

    Is it in the professional forum? I ask because I cannot access it.
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    And as always, you are right. :grin2: I've...

    And as always, you are right. :grin2:

    I've found a detailed explanation on this subject from Güntner:
    ...
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    I forgot to add this guide from Sporlan: ...

    I forgot to add this guide from Sporlan:

    https://sporlanonline.com/literature/misc/Form%205-492.pdf

    On page 11 & 12 we can see that the capacity of glide refrigerants (R-448A & R-449A) is...
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    Thank you for your replies. I was just...

    Thank you for your replies.

    I was just checking into evaporators datasheets, and some vendors display capacities based on mean temperature, like this one:

    https://docs.k-rp.com/1082851.pdf
    ...
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    evaporator capacity at dew or mid temp.?

    When selecting an evaporator to be used with refrigerant mixtures with high temperature glide (e.g. R-449A, R-448A etc.), do you consider the capacity of the evaporator at dew point or at the...
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    Also, I forgot to mention, the thing that bothers...

    Also, I forgot to mention, the thing that bothers me personally, I'd rather undersize than oversize the compressor with respect to the evaporator.

    If I oversize the compressor, the suction temp...
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    :grin2: You welcome. Since I started following...

    :grin2: You welcome.
    Since I started following this forum, I've made my self a spreadsheet which I use to convert imperial units to metric and vice versa. That way it's much easier for me to...
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    Thank you!

    Thank you!
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    Hi, thanks for the reply. Sorry, I don't...

    Hi, thanks for the reply.


    Sorry, I don't understand this. What do you mean by undersize?

    This one I understand :)
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    Evaporator / compressor match

    Hi,

    When matching together evaporator and compressor (condensing unit), do you consider suction pressure drop for shorter line lengths, let's say up to 30 feet?

    For example, if I need an...
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    Do you have gauges installed to check those...

    Do you have gauges installed to check those pressures and temperatures on a suction line?

    Which part of the suction line is frosting? The suction header, or also the pipe before the collector?
    Do...
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    Not quite :)

    Not quite :)
  20. Thread: Freezer Drain

    by BobFrost
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    :) Very clever. For you guys that run the...

    :) Very clever.

    For you guys that run the drain pipe heater all the time, aren't you adding that extra heat load to the evaporator?
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    OT: Is there a chance to send a personal message...

    OT: Is there a chance to send a personal message on this board?
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    I assume it's done by a signal from a suction...

    I assume it's done by a signal from a suction probe.

    Which Carel controller do you have? pRack perhaps?

    Is there User manual available online for this unit?
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    Thanks. Makes sense. I am from Europe and I...

    Thanks. Makes sense.

    I am from Europe and I was looking for a literature and couldn't find any definitive guidelines. Usually from what I see, condensers are sized for TD = 10 K (TD = 18 °F) and...
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    Sorry icemeister, I didn't ask my question well....

    Sorry icemeister, I didn't ask my question well. English is not my native language, but I guess you noticed that :grin2:


    You wrote:



    so I am wondering why is the LT condenser sized at 10°F...
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    Hi, thanks everyone for the answers. Could...

    Hi, thanks everyone for the answers.


    Could we also say that we oversize it in this way?

    Also, why is the LT condenser sized for lower TD?

    Are you referring to the COP?
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    Condenser sizing question

    Hi,

    I have a question about sizing a condenser.

    When sizing a condenser, should we consider only an operating point at which compressor and evaporator match (working point), or should we also...
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    Do you have some document or a link where where...

    Do you have some document or a link where where this is explained a bit more? Thanks.
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    You're absolutely right, this is where I made a...

    You're absolutely right, this is where I made a mistake. Now I get 1797 W which is ~6132 BTU/hr.
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    I have been reading this topic and converting...

    I have been reading this topic and converting feets and BTU's to metric units to understand the topic better since I'm not from USA.
    I got very much surprised by the amount BTU's that are suggested...
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    Thank you, now I get it!

    Thank you, now I get it!
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    Hi, I am posting for the first time here, but I...

    Hi, I am posting for the first time here, but I have been following this forum for a while.





    Could some of you guys elaborate this a bit? Why is this more important when the unit is...
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