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  1. Replies
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    Follet makes cublets which are compressed flakes....

    Follet makes cublets which are compressed flakes. They are designed for sick people to chew.
  2. Thread: ICP CAC048LAA

    by mccann
    Replies
    11
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    354

    Assumptions could be costly.

    Assumptions could be costly.
  3. Thread: 407c

    by mccann
    Replies
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    435

    Here is some info on 407c. It shows how you need...

    Here is some info on 407c. It shows how you need to watch out when looking at charts.
  4. Does the manual show how the discharge pressure...

    Does the manual show how the discharge pressure alarm point is figured using the SCT sensor when there is no transducer on the 50AJ models? I don't see it in there. I do read that the 50A2 models...
  5. With the compressor off, my actual PSIG was about...

    With the compressor off, my actual PSIG was about 200, ambient was 105*F. The ComfortLink showed 298 for head pressure. I reset compressor, Head went to about 300 on my gauge then the compressor...
  6. I wonder why the factory would use transducers...

    I wonder why the factory would use transducers for the suction and not the discharge. What is the calculation?
  7. Thread: Leak Detection

    by mccann
    Replies
    16
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    798

    The H10 comes with a sample reference bottle with...

    The H10 comes with a sample reference bottle with a little hole on top to test sensitivity. Put some soap on it and see if it bubbles. I have not done this, but it might answer the question.
    I put...
  8. Comfort Link shows a head pressure when there ain't no transducer.

    Carrier, 50AJB025-C-611FF, 4704F70024
    Getting Comfort Link controller alarm T127 which is high discharge pressure circuit B. Controller shows suction pressure and discharge pressures for both...
  9. What should not be needed, and what is needed, do...

    What should not be needed, and what is needed, do not always line up. It depends how the rack is controlled, how many and what sizes compressors there are, how badly the cases are designed and...
  10. Superheat at the header is 61*f (404a at 12# =...

    Superheat at the header is 61*f (404a at 12# = -26*f) so flooding is not a problem and the compressor is being nicely cooled. It would be ideal if cases and the system are so perfectly set and...
  11. Replies
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    12,153

    It will eventually come back to the U.S.....

    It will eventually come back to the U.S.. Artificial intelligence will design it. Robots will build it. It will be so well made it won't break.
  12. Replies
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    3,125

    It amazes me how a company like Aaon and others...

    It amazes me how a company like Aaon and others can invest so much and make such a nice looking unit with good piping, nice heavy sheet metal and clear wiring posted on the well-made access doors; I...
  13. Replies
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    Ingersoll-Rand air drier alarm "SE"

    Ingersoll-Rand, TS800, air drier for a big compressed air automation system, is getting and alarm "SE". The unit is working fine that I can see. Their manual does not show this alarm. I did not find...
  14. I would ask this question again in the...

    I would ask this question again in the supermarket or controls area. I do remember the CPC Einstein will communicate over the web because it has an IP address, so you just need to plug it into a...
  15. Replies
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    789

    he Of course I know it only pumps one way....

    he
    Of course I know it only pumps one way. Haha. My question was on the recovery machine I mentioned, If you turn the knobs about 1/2 way, when the machine is off; the gas left in the high side of...
  16. Replies
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    789

    Putting recovered gas back in.

    A couple questions:
    With a G5 twin recovery machine, what is the hand valve position for having the refrigerant flow backwards through the machine? There seems to be a strange middle position for...
  17. Replies
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    3,848

    I buy the set of 3 short hoses with ball valves...

    I buy the set of 3 short hoses with ball valves (Yellow Jacket 25980, Flexflow Adapter Kit) and put them on the end of my main hoses. I remove the schrader push-in thing from my main gauge hoses. I...
  18. Replies
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    2,392

    Are those 2 actual driers or just some kind of...

    Are those 2 actual driers or just some kind of screen filters like on cap-tube systems?
  19. Replies
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    1,142

    Can you just cut off the u-bend and stuff a...

    Can you just cut off the u-bend and stuff a little bend piece of copper in there and weld it? I assume it's copper. If you have to pinch off and abandon that one row, be sure to adjust superheat...
  20. Replies
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    937

    407C has a big glide. Superheat pressure to...

    407C has a big glide. Superheat pressure to temperature must be read in the vapor or dew point column. Subcooling pressure to temperature must be read in the liquid or bubble column. It gets...
  21. Bad outdoor txv

    I had a bad outdoor txv on a Trane unit the other day. It would cool fine, suction 65# (R-22). In heat it would pull down below 30# and go off on low suction pressure. It worked in cooling because...
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    460

    Thank you. You are right. I thought about that;...

    Thank you. You are right. I thought about that; but they always seem like they're talking Greek overthere. They are intimidating. I figured they would just say: "better call a control company." They...
  23. Replies
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    549

    Thank you. The plot thickens. That does not seem...

    Thank you. The plot thickens. That does not seem to be the way they have it running. I'm just learning this VAV stuff. I will have to go back there and verify what's going on.
  24. Replies
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    736

    Thank you. I understand what you are saying. Just...

    Thank you. I understand what you are saying. Just in the last days I have been learning a lot now that I'm digging into it. With the help of HVAV-TALK, Google, You-Tube and some books I just sent for...
  25. Replies
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    460

    Lost VAV communication, Novar

    I have a cascade of problems from a parallel fan powered box with a Novar VAV-4020 controller. In the heating mode, the outputs were going on and off in a quick seemingly random way. I could see the...
  26. Replies
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    549

    Parallel fan powered box question.

    With a fan powered parallel box, Titus DTQS-06, with ceiling plenum, What stops the air from going out into the ceiling when in cooling mode? Why don't they have a damper on it? Most air pushes past...
  27. Replies
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    736

    How do I check a VAV box?

    How do you guys check a VAV box controller or box you are unfamiliar with? I'm not as experienced on them as I would like to be. Currently I just cycle power and watch it move.
    Do you check the...
  28. Replies
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    11,675

    If you're talking about the brass nut on service...

    If you're talking about the brass nut on service valves that has 2 flat sides; I have never seen a wrench for them. However, you can stop the leaking (assuming someone hasn't destroyed the stem using...
  29. Thread: chrigs

    by mccann
    Replies
    8
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    828

    Next time I would put in 407c if you already have...

    Next time I would put in 407c if you already have POE in there. It's a lot cheaper than 22 and should be around for a few years.
    People: please have a paint marker or something in your pocket or...
  30. Replies
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    5,427

    I had a condenser the other day that had the two...

    I had a condenser the other day that had the two bottom tubes plugged with black crust inside. Had to abandon those two tubes. Who knows what's inside the condenser tubes?
  31. Replies
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    1,166

    I hate those supply/return contraptions in 7-11s....

    I hate those supply/return contraptions in 7-11s. The return would be so cold, but the room where the customers were was warm. They should shoot whoever came up with that. Had to add freeze stats to...
  32. Replies
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    914

    If 5 sensors in an area read 71.0*f but one...

    If 5 sensors in an area read 71.0*f but one sensor reads 74.3*f and this has a trend average of measuring within 1.1* and the supply, return, building walls, refrigerant temperatures, static...
  33. Replies
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    There would not be sweating big fat hogs because...

    There would not be sweating big fat hogs because there would be 10 or 20 sensors in the room. Supply and return of every vent and around desks and walls. It would tell you when the batteries are at...
  34. Replies
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    Artificial Intelligence opinion

    Are you excited about the future of HVAC? I read about this HVAC control system that continues learning. http://www.vigilent.com/
    So far, they seem to specialize in computer rooms. It keeps years...
  35. Replies
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    1,024

    Leak lock the male threads starting about 2...

    Leak lock the male threads starting about 2 threads up so not to get Leak Lock into the system . Make sure the threads are clean. If brass fittings are loose or it is steel pipe, I put teflon tape on...
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    Any good temperature alarms?

    Any opinions on a good little set of temp alarms for a restaurant. I hate the interface on most that I've seen over the years. There must be some decent ones now days with all the technology...
  37. Replies
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    One more, less likely possibility I've seen, was...

    One more, less likely possibility I've seen, was high superheat. As moisture hit the less cold, dryer parts of the coil, it no longer clings to the coil. One time, after cleaning the coil, it...
  38. Replies
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    3,593

    Someday I would like to experiment with a unit...

    Someday I would like to experiment with a unit and graph all the values that can be measured as I add refrigerant from 0% to way over charge, at standard indoor and outdoor. Then repeat the...
  39. Replies
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    No. It has R407c, two 10 ton txvs, a top coil...

    No.
    It has R407c, two 10 ton txvs, a top coil and bottom coil, 3 compressors in tandem, One big one and two smaller, hot gas bypass, hot gas reheat, electric heat. The control panel in the photo...
  40. Replies
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    1,325

    Thanks; I'll know more after today when I have...

    Thanks; I'll know more after today when I have seen it myself. Navigation of the controller is usually my first confusion when deal with any new equipment.
  41. Replies
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    580941580951580961

    580941580951580961
  42. Thread: Part changers

    by mccann
    Replies
    26
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    3,592

    Keep increasing the size of the breaker or fuse....

    Keep increasing the size of the breaker or fuse. The answer will come in a flash.
  43. Replies
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    1,325

    Military AC units

    Anybody know about these military units? I'm told I will be changing a compressor on a EEI (Engineered Environments, Inc.) It has tandem Trane 15 ton or so compressors. It sits on a trailer with flex...
  44. Replies
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    1,646

    When measuring ohms and amps on a small 480 volt...

    When measuring ohms and amps on a small 480 volt crankcase heater; if you don't have a sensitive meter, you may think it's open.
  45. Replies
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    27,378

    Looks like a better design than the Sporlan one....

    Looks like a better design than the Sporlan one. Better price too. What will not be connected to our phone in the future?
  46. Replies
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    3,614

    If it saves money, we will be seeing this...

    If it saves money, we will be seeing this everywhere soon. Plumbers have been using it for years. Low bid gets the job. Good thing o-rings never fail, ha ha. I wonder how it will do with heat pump...
  47. I work on a bunch of Lieberts with 407c. All have...

    I work on a bunch of Lieberts with 407c. All have clear sight glasses.
  48. I work on a bunch of Lieberts with 407c. All have...

    I work on a bunch of Lieberts with 407c. All have clear sight glasses.
    I have seen some refrigeration systems that never clear the glass. When it's running nice, the refrigerant will "river" by the...
  49. Replies
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    1,385

    It is a York,...

    It is a York, YCIV0177VA46VABBXTXXXXXLXXXX44XXXXX...........Typical giant model #.
    The sensor starts reading high by about 10*. It has happened on two different same model units which are right next...
  50. >Dual sensors everywhere: Subcooling, superheat,...

    >Dual sensors everywhere: Subcooling, superheat, ambient, motor temps, supply, return, amps. Differences in adjacent sensors will alarm a fault.
    >Artificial intelligence learns and controls...
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