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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...
  2. 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...
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    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...
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    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...
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    3,318

    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...
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    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?
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    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...
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    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...
  9. 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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    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...
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    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.
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    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...
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    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...
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    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...
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    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...
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    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...
  17. Thread: chrigs

    by mccann
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    633

    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...
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    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?
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    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...
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    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...
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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...
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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...
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    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...
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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...
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    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...
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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...
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    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.
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    580941580951580961

    580941580951580961
  30. Thread: Part changers

    by mccann
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    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.
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    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...
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    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.
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    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?
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    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...
  35. 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.
  36. 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...
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    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...
  38. >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...
  39. It's important to have a solid column of liquid...

    It's important to have a solid column of liquid at the TXV to have it function well. That's the idea of having some subcooling (indicating fully condensed liquid). I would try to get a clear glass...
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    Temp sensors fail on York chillers

    Is it common to see a lot of temperature sensor failures on a York chiller? This one chiller we do has had the chilled water sensors fail multiple times. Anybody else seen this?
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    You are not wrong. I do not do such things...

    You are not wrong. I do not do such things lightly. I'm going to speak to our salesman and let him explain the cost risk analysis to the customer.
    This was one reason I was asking for some numbers...
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    What is the math formula you used?

    What is the math formula you used?
  43. Replies
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    1,596

    There are no taps or vents. Two 3" gate valves...

    There are no taps or vents. Two 3" gate valves isolate the chiller from the loop. In the winter they shut the gate valves and open a bypass valve so water is just pumped back to the tanks.
    I...
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    It's fresh potable water. They circulate it...

    It's fresh potable water. They circulate it through the chiller and feed off the tank to mix cement in their trucks. They must have some make up water to keep the tank full.
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    Yes it is cooling the actual water that is used...

    Yes it is cooling the actual water that is used for the cement. Yes, it does have a strainer. I should open that the first thing when i get back there. I will.
    Question: As a strainer plugs; what...
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    Jayguy: Why do you say "that explains the...

    Jayguy: Why do you say "that explains the approach?"
    I was hoping to get some numbers in my head to go back with. That approach is high for these brazed plate heat exchangers from my reading, but...
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    Trane chiller low suction.

    Trane, 60 ton, CGAFC604A10000E000... Both circuits go off on low pressure as the water temperature gets closer to set-point.
    This chillers cools a 20,000 gal tank of water that is used for making...
  48. Thread: Liebert System4

    by mccann
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    1,161

    What is a system 4? I have all the training...

    What is a system 4? I have all the training manuals for Liebert and I don't see it. Do you have a model #?
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    @hvac69. I think you are right. Alas, I was...

    @hvac69. I think you are right. Alas, I was hoping I could change the output to analog. I do not see clear instructions on the web anywhere. I have already called in the "control company" to come...
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    Belimo to controller change output

    I am looking for instructions on how to change the output of a controller.
    I have a Automated Logic controller ZN341v+ connected to a Belimo TR24-SR-T US for a reheat valve on a VAV. On a call...
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