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Type: Posts; User: RobY

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  1. Replies
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    1,983

    It is common for some mechanical contractors to...

    It is common for some mechanical contractors to pull a refrigerant sample on a regular basis to find out what the quality of the refrigerant in the unit is. You can do things like trend the moisture...
  2. Replies
    10
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    2,342

    We have enough R-22 on hand to last for a while....

    We have enough R-22 on hand to last for a while.

    The more people fix leaks and recover and reuse the R-22, the longer it will last. The more venting / leaking, the sooner it will go short. This...
  3. Replies
    10
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    2,342

    We test these oils daily from sample kits sent in...

    We test these oils daily from sample kits sent in from HVAC/R equipment in the field. My lab can tell the difference between the Mobil (Hatcol) and Trane (Lubrizol) POE lubricants when we run the...
  4. Replies
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    2,342

    The Carlyle recip compressors are approved to use...

    The Carlyle recip compressors are approved to use Emkarate RL68H. The Carrier centrifugals are not approved for RL68H in all cases. Carrier is working on approving replacements for the Castrol SW...
  5. Replies
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    2,342

    Trane 48 is a 68 cSt viscosity POE lubricant...

    Trane 48 is a 68 cSt viscosity POE lubricant based on Emkarate RL68H.

    Mobil EAL Arctic 68 is also a 68 cSt viscosity POE, but is no longer sold under that name, it is now called Hatcol 3693.
    ...
  6. Thread: R22 to MO 99

    by RobY
    Replies
    9
    Views
    3,560

    The area to watch our for with TXV sizing is if...

    The area to watch our for with TXV sizing is if you are running the rack with a lot of sub-cooling. Many of the R-22 replacements will need higher mass flow rates at high sub-cooling values than the...
  7. Thread: R 507

    by RobY
    Replies
    24
    Views
    2,169

    There was an ARTI MCLR report on compatibility of...

    There was an ARTI MCLR report on compatibility of engineering plastics and refrigerants / lubricants done in 1993. Here is a link to the final report, although the US government wants money to get a...
  8. It works. It has been working since the mid...

    It works. It has been working since the mid 1990s when some supermarket chains started using it in the Northeast US as an alternative to R-502 and R-404A/R-507 in new equipment. I was supporting it...
  9. Replies
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    1,162

    When your system was punctured, you may well have...

    When your system was punctured, you may well have lost some oil when the refrigerant charge escaped. Refrigerant and oil will always travel together in the system, and when you lose the refrigerant,...
  10. Thread: York Oil

    by RobY
    Replies
    23
    Views
    8,328

    Call the URI store direct in Montgomery. You...

    Call the URI store direct in Montgomery. You will likely get a better price than what is shown on the internet, which is the pricing with no discounting at all. Let the store know what the York...
  11. Thread: York Oil

    by RobY
    Replies
    23
    Views
    8,328

    United Refrigeration carries a lot of the Solest...

    United Refrigeration carries a lot of the Solest product line. Solest 120 is definitely in their system.

    Rob Yost
    National Refrigerants
  12. Thread: York Oil

    by RobY
    Replies
    23
    Views
    8,328

    Here is the source of the bad information on York...

    Here is the source of the bad information on York 'L'

    http://www.nucalgon.com/assets/prodlit/3-245.pdf

    York 'L' is based on CPI Solest 120. I let Nu-Calgon know a couple of years ago their...
  13. Thread: oil mixture

    by RobY
    Replies
    4
    Views
    1,022

    They are fine when mixed together. Remember that...

    They are fine when mixed together. Remember that R-401 and R-402 call for a 50:50 mixture of MO/AB to get better oil circulation.

    Rob Yost
    National Refrigerants
  14. Replies
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    1,387

    The plastic bottles don't allow moisture through...

    The plastic bottles don't allow moisture through that fast. It normally takes many months for the samples to pick up as much as 100 ppm of moisture.

    I can't tell you how many samples we have lost...
  15. Replies
    14
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    1,387

    If the POE has no dissolved refrigerant, and the...

    If the POE has no dissolved refrigerant, and the container has a large opening, then that may be true. It takes a longer time than that to get a measurable increase in moisture.

    The outgassing...
  16. Replies
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    1,738

    This information is from Kluber in Germany, and...

    This information is from Kluber in Germany, and was for ammonia and mineral oils (the 3% moisture solubility gives it away). The CFC and HCFC refrigerants have different chemical reactions than...
  17. Replies
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    1,738

    You have got this exactly right. It's the high...

    You have got this exactly right. It's the high temperatures that cause the cap tube plugging problems. Dirty condensers are the main reason for the high T, but a bad fan motor will also cause major...
  18. Replies
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    1,842

    Ph-D, you are confusing the ability to do...

    Ph-D, you are confusing the ability to do something with the cost effectiveness to do it. You stated that air cannot be removed from refrigerant in the feild, where in fact it is done in many...
  19. Replies
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    1,842

    Ph-D, I'm sorry but I can't find much in your...

    Ph-D, I'm sorry but I can't find much in your post to agree with as far as the behavior of air - refrigerant mixtures. Nitrogen and refrigerants do not form any type of azeotrope, and are easily...
  20. Replies
    22
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    1,842

    There was a recent ASHRAE Research project...

    There was a recent ASHRAE Research project (RP-1303) completed on the distribution of air between the liquid and vapor phases of refrigerants. R-134a was one of the refrigerants tested, and here are...
  21. Thread: Oil sample

    by RobY
    Replies
    3
    Views
    681

    The bottles aren't as important as the way you...

    The bottles aren't as important as the way you degass the refrigerant from the oil prior to shipping.

    You have to let most of the refrigerant vaporize out of the oil sample in order to prevent the...
  22. Replies
    8
    Views
    785

    I was on the ARTI MCLR (Materials Compatability...

    I was on the ARTI MCLR (Materials Compatability and Lubricants Research) advisory board when they did a lot of research in the past. ARTI got funding from the US DOE and contributions from the...
  23. Replies
    7
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    1,751

    Definitely a typo by some City of Los Angeles...

    Definitely a typo by some City of Los Angeles employee. They are referring to DuPont HP-62 as R-404B -- HP-62 is definitely R-404A.

    The City of Los Angeles has some issues dealing with...
  24. Replies
    7
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    1,751

    There is no such refrigerant as R-404B. Not as...

    There is no such refrigerant as R-404B. Not as an ASHRAE number, not in ARI 700, not in ISO 810, not anywhere, even in China. Believe me, I would know if there was an R-404B refrigerant anywhere on...
  25. Replies
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    1,074

    The primary loop contains the refrigerant that is...

    The primary loop contains the refrigerant that is sent through the compressor.

    The primary loop loop absorbs or rejects heat to/from the secondary fluid (water, glycol, CO2, brine etc.). The...
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