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Type: Posts; User: Chiller Guy

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  1. Replies
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    I can give you some idea's from here in the S....

    I can give you some idea's from here in the S. Pa. area (Kennett Square, Kaoln, Avondale). Most of the houses are small "chicken house" like buildings that are totally enclosed so the enviornment can...
  2. The evap side looks Ok. You show making 4 degrees...

    The evap side looks Ok. You show making 4 degrees thru the bundle with an approach of 2-3 degrees. Check the belly temp and compare it to the evap pressure and leaving chill h2o when you get time....
  3. So you have 73/76 cond h2o in & out with an 84...

    So you have 73/76 cond h2o in & out with an 84 degree liquid temp off the cond. These machines were usually at 10/10/10 at full load. That is 85/95/105 on the liquid temps. You are showing 8 degrees...
  4. You should be able to pick up fouling by using...

    You should be able to pick up fouling by using the approach.

    What problem are you having? Perhaps we can help!
  5. I figure you should need about 1224 gpm thru the...

    I figure you should need about 1224 gpm thru the cond for 425 tons @ a 10 delta T. That flows should produce about 13' delta P

    The single pass evap can vary if you know the delta T (5-8-10) or...
  6. No recommended delta p. It will be a function of...

    No recommended delta p. It will be a function of flow, but here are the numbers to work with.
    Delta p on cond at min flow = 2'
    at max flow = 21'

    Delta p on 1 pass evap at...
  7. Chet, I hope this is some help! PCV-4D-C1-D2...

    Chet,
    I hope this is some help!

    PCV-4D-C1-D2 = Packaged CentraVac
    4= 400 Tons
    D = part of 100 tons (in this case I beleive it was 25 tons)
    ...
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    See if this helps, Packaged Centravac -275...

    See if this helps,

    Packaged Centravac -275 tons capacity
    2 pass Evap (Ithink)
    2 pass cond
    208 gpm min on 2 pass evap -695 gpm min on 1 pass evap
    765 gpm max on 2 pass evap - 1530 gpm max on 1...
  9. There are a lot of charts. What model are you...

    There are a lot of charts. What model are you looking for?
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    859

    Seems to me that anything as aggressive as...

    Seems to me that anything as aggressive as sandblasting could screw up the balance of an expenesive impeller.
  11. Replies
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    1,006

    When looking at a wiring diagram think of the...

    When looking at a wiring diagram think of the relay/switch still in the box an a suppliers shelf. That is the position of the contacts depicted NO/NC. Another way is to think of the unit condition...
  12. Replies
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    2,152

    VRF Systems

    Looking for some opinions here if you guys aren't too shy (ha). Was looking at some building prints today that is designed around Daikin geothermal units and Variable Refrigerant Flow. I know these...
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    There are several of us here that know how to do...

    There are several of us here that know how to do this calulation and I recall it being addressed in earlier posts. As mentioned, your best bet is to contact either the compressor manufacturer for...
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    The training issue has been around forever and as...

    The training issue has been around forever and as we can see its handled in differet ways throughout the country. Many owners/bosses are short sighted here fearing the loss of a tech whom they have...
  15. Replies
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    1,612

    Try to get some training. Self teaching could be...

    Try to get some training. Self teaching could be expensive. They are sometimes called "chemical time bombs" among other things and with good reason. You need to be part mechanic. part chemist. part...
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    Again, two seperate circuits exibiting almost the...

    Again, two seperate circuits exibiting almost the same conditions! What is common to both?
  17. Replies
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    1,780

    I'm in Delaware and know what kind of weather we...

    I'm in Delaware and know what kind of weather we are having here and probably there! We are at or above design conditions a lot this year. Whats chances that you have more load than you have machine?...
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    200 feet of piping and a history of losing...

    200 feet of piping and a history of losing compressors makes me think oil return ( or lack of). Do a calculation on the pipe sizing. Suct & liquid.
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    The Key words are"may be". If you start playing...

    The Key words are"may be". If you start playing chemist out in the field it may get messy and you are going to assume a lot more responsabitily than you already have on your shoulders. Admittedly, I...
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    1,674

    One of the reasons that Trane changed inhibitors...

    One of the reasons that Trane changed inhibitors through the years was the use of different materials in the tube bundles, especially concentrators on high temp machines. May be part of the answer.
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    The purpose for the inhibitors(protecting the...

    The purpose for the inhibitors(protecting the shell/tubes, adjusting Ph, preventing hydrogen, etc) is not the issue. The inhibitors do not get along with one another and could give you fits as...
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    I do not think this has gotten out of hand as it...

    I do not think this has gotten out of hand as it is a way for all of us to learn. It would go a lot faster if we were all together over a Corona (or your choice) but this is the way we are doing it....
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    3,693

    The certification exams were and are developed by...

    The certification exams were and are developed by many organizations but all have to meet some federal guidelines. The tests came from a library of questions put out by the feds and differed from...
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    Mr Smith pretty well outlined the "flushing...

    Mr Smith pretty well outlined the "flushing procedure" that I was taught and used. The refractometer has been around for this purpose for a looong time. The issue here is one I thought we all would...
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    In trying to remember the procedure for...

    In trying to remember the procedure for conversion from mineral oil to synthetics I recall a " Flushing process" to get the mineral oil content down to acceptable levels. During this process the two...
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