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  1. Replies
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    Here's a good presentation about different types...

    Here's a good presentation about different types of underfloor heating systems:

    https://www.gccaonline.com/eweb/documents/Fountain-Wolley_HeavingFloors.pdf
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    Back in the 1950s R22 was commonly used for low...

    Back in the 1950s R22 was commonly used for low temperature work, but due to its high discharge temperatures R502 was introduced around 1960. Then in the 1980s when the EPA announced the phaseout of...
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    A self-contained open display cooler will never...

    A self-contained open display cooler will never hold proper temperature in a 90F store. They are designed for 75F 55% RH and some I've seen have a rather difficult time managing even that...
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    What is the compressor model number? I did...

    What is the compressor model number?

    I did find this, if it helps: http://www.secop.com/fileadmin/user_data/pdfs/brochures/compressors_r134a_r404a_r290_115v_60hz_05-2012_desb490d102.pdf
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    Just try to understand the basic function of each...

    Just try to understand the basic function of each type, because as the others have said, they can be used for many applications. Also, you could add evaporative fluid coolers and air-cooled...
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    Get your post count up so you can apply for...

    Get your post count up so you can apply for Professional status here on HVAC-Talk. The Pro threads have a lot more in-depth and hands on discussions than you will find in the open areas. Also the...
  7. I'm no legal expert to say the least, but I do...

    I'm no legal expert to say the least, but I do believe if you were to install something like this...a component without a UL label...you could be held liable for damages if it one day were found to...
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    That's the Bill of Material (BOM) number. The...

    That's the Bill of Material (BOM) number. The model number would then be AKA9438ZXA according to the Tecumseh parts lookup:

    http://boxload.tecumseh.com/CompFastRef.aspx

    This gives you the...
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    You got rid of this customer once before...and...

    You got rid of this customer once before...and you should do it again now. These people will never let you make a dime.
  10. Replies
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    1,379

    There's may not be a floodback/slugging problem...

    There's may not be a floodback/slugging problem at all, but it's possible. It's something to watch for.

    I hadn't thought of the extra coil acting like a receiver. Cap tubes vary the flow depending...
  11. Replies
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    With a cap tube system, all the refrigerant in...

    With a cap tube system, all the refrigerant in the system wants to go to the cold evaporator during an off-cycle. I'm sure you've noticed that happen but perhaps never thought about it much. The CC...
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    The way the secondary condenser is piped pretty...

    The way the secondary condenser is piped pretty much says it'll be full of liquid, so it's more like a large subcooler.

    Do you know how much additional R404A refrigerant you added above the...
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    Correct. If you're already subscribed, it...

    Correct. If you're already subscribed, it becomes Unsubscribe from the Thread.
  14. Replies
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    485

    I'm not so clever... I have always wondered...

    I'm not so clever...

    I have always wondered why so many people post with just a dot.:putergreet:
  15. Replies
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    Cool! :) Covered yourself with the extra...

    Cool! :)

    Covered yourself with the extra condenser though...but that's OK. I can forgive. ;)

    115 Def F SCT at 90 Deg F ambient looks good.



    That 32 Deg of subcooling likely comes largely...
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    Scroll up to the top of the thread > Thread Tools...

    Scroll up to the top of the thread > Thread Tools > Subscribe to this Thread > Add Subscription
  17. Is it a CR18 or a CR16? The TD Powell...

    Is it a CR18 or a CR16?

    The TD Powell calculated earlier was based on the A/C ratings for the CR18 which include 15F subcooling. If you use the high temp (HT) ratings with 0F LSC the capacity...
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    The old York design has been manufactured for...

    The old York design has been manufactured for many years by A-1. The DER26F is a 30,000 lb/day machine and takes their 54-D remote unit, which appears to be dual 27 HP compressors.
    ...
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    If the two cap tubes feed the same evaporator...

    If the two cap tubes feed the same evaporator circuit, then stick with the single 115" length of BC-3. If they feed different circuits, use (2) 118" lengths of BC-2.
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    That's good. I looked up this unit at Copeland's...

    That's good. I looked up this unit at Copeland's OPI and found it had the same capacity as the R404A compressor your getting, which is about 10% higher than the one with R134A. This also means that...
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    If the existing double cap tubes come together...

    If the existing double cap tubes come together into a single before entering the evaporator, you should simply go with one cap tube. It looks like 115" of BC-3 would work according to the Tecumseh...
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    The RST55C1E will do 2870 Btuh at -10F SST /...

    The RST55C1E will do 2870 Btuh at -10F SST / 110F SCT with R404A. For dual cap tube feed (1435 Btuh each) I get two 118" of BC-2 (.040" ID) cap tubes using the Tecumseh program. That is based on...
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    Oops! I missed the R12 part in the thread title. ...

    Oops! I missed the R12 part in the thread title.

    It shouldn't make too much difference, but I did see loss of capacity with R12 to R134A conversions...especially with freezers. So that could...
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    Keeping the condenser clean is a problem either...

    Keeping the condenser clean is a problem either way. As for designed for a conditioned space, I just say it worked OK before...so why shouldn't it work now? I see no need or benefit to...
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    This box apparently worked OK for a long time...

    This box apparently worked OK for a long time with R134A, so I'd stick with it.

    The best thing you can do is get that condenser super clean, then get it restored back to OEM specs with a proper...
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