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Type: Posts; User: Randy S.

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  1. Two wire transmitter on UNT controller AI

    We want to install multiple 4-20 flow meters on various UNT controllers in a Metasys system..

    We will use a 500 ohm resistor on each one to adapt to the AIs configured for 2-10.

    Three of the...
  2. I ended up going direct to the Microgateway RS232...

    I ended up going direct to the Microgateway RS232 port, with a altered version of the configuration that put the MicroGateway in terminal mode. I then forced a download of the correct program, and...
  3. The MicroGateway is model 371-02592-101. It does...

    The MicroGateway is model 371-02592-101. It does not have the quickstart capability. I have looked at the UDC port configuration through the keypad display and it is YorkTalk 2 on port 2, talking to...
  4. Yes, I have the software and I made up a cable...

    Yes, I have the software and I made up a cable last week. I was able to get into the Gateway, but I think I had the DIP switches set wrong when I did.

    I will have the exact model when I get back...
  5. The configurator I am referring to is for setting...

    The configurator I am referring to is for setting up the Microgateway. There is only one Microgateway and it's on the LAN port of the UDC.

    The Microgateway looks to be one of the older ones, but...
  6. It's the one line display control cabinet on the...

    It's the one line display control cabinet on the two YTs.

    On the Configurator, there are three "boxes" for settings at the top of the screen. One is "Type", and the other two are for Port 1 and...
  7. The Microgateway is on the LAN port 1 on the UDC...

    The Microgateway is on the LAN port 1 on the UDC processor, two wires to port 1 on the MicroGateway, RS 485 terminals.
    The N2 is on port 2 at the Microgateway, also RS485 terminals

    The chiller...
  8. York ISN UDC communications to N2 via Microgateway

    I am working with an old York UDC processor which communicates with two YTs with aftermarket VFD conversion from about 2003.
    There is also a UDC keypad and I/O for pumps, tower fans and etc. to run...
  9. Replies
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    1,277

    WSHPs in commercial buildings tend to be...

    WSHPs in commercial buildings tend to be installed in locations that are difficult to access for service or repair. The hydronic loop serving them must have sufficient heat rejection capability for...
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    1,059

    Gunk-itis from non-condensibles? Wet system? ...

    Gunk-itis from non-condensibles?
    Wet system?

    Moon phased wrong?
  11. Replies
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    1,059

    Wildly fluctuating load?

    Wildly fluctuating load?
  12. Replies
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    5,719

    If it's a 16JB, learn how to work the purge for a...

    If it's a 16JB, learn how to work the purge for a start.

    We all started where you are at. My e-mail is in my profile.
  13. Replies
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    3,321

    Truth and humility will get you a lot farther in...

    Truth and humility will get you a lot farther in the long run than BS and foolish pride.

    Don't ask how I learned that or how long it took.
  14. Replies
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    Any of them require a removal of the old...

    Any of them require a removal of the old refrigerant, so the term "drop-in" is misleading.

    I'm asking about the ones that allow you to use the existing mineral or alkyl-benzene oil.
  15. Replies
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    1,802

    22 substitutes

    Asking your opinions on the various 22 substitutes that will work with existing oils. I'm sure I'm not the only one wondering.
  16. Replies
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    11,988

    They seem to be losing business in this area,...

    They seem to be losing business in this area, too, and their parts distribution is one of the worst in the business.
  17. Thread: King valve

    by Randy S.
    Replies
    27
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    15,557

    If I'd never asked any dumb questions, I wouldn't...

    If I'd never asked any dumb questions, I wouldn't know anything.

    In fact, some would say I still don't know anything.
  18. Replies
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    2,496

    I wonder if bad valves prevented the compressor...

    I wonder if bad valves prevented the compressor from pumping down, and how much oil is in the condenser.
  19. Thread: CLR

    by Randy S.
    Replies
    2
    Views
    764

    Good grief. Where do you start with somebody that...

    Good grief. Where do you start with somebody that ignorant?

    I can only imagine what the condenser, and evaporator tubes, look like.

    Show them the high approaches and explain it is wasted...
  20. If you use a comfort cooling type unit, you need...

    If you use a comfort cooling type unit, you need to size based on its sensible capacity, and the results may not be as good as a "precision cooling" type unit, regardless of the brand. Carefully...
  21. Replies
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    8,403

    Measure the high side pressure and then take the...

    Measure the high side pressure and then take the temperature of the liquid line leaving the condenser.
  22. Replies
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    4,174

    Carrier has a new software version for their...

    Carrier has a new software version for their 19XRV for dealing with variable flow primary.
    Especially for when a third party controls the primary pump VFD and a programmer slams it up and down...
  23. Replies
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    4,174

    "Decoupled" is the word. But you gotta design...

    "Decoupled" is the word.

    But you gotta design for it, and have a controls contractor who understands.
    For you variable flow evap folks, have the chiller control package in control of the primary...
  24. Replies
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    1,212

    If there's copper, it would show up in a solution...

    If there's copper, it would show up in a solution analysis.

    The chromate inhibited units I've worked with usually had a green color to the solution.
  25. Replies
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    1,212

    Maybe your refrigerant water is logged with...

    Maybe your refrigerant water is logged with solution.

    Not familiar with McQuay absorbers, but on the other brands I've ran, there was a way to dilute the solution with refrigerant water. If so...
  26. Thread: R11 Weight?

    by Randy S.
    Replies
    4
    Views
    1,488

    Illegal to sell it like that and to use it as a...

    Illegal to sell it like that and to use it as a flushing solvent.
  27. Thread: wye-delta

    by Randy S.
    Replies
    14
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    2,573

    I'd be for calling the compressor supplier, after...

    I'd be for calling the compressor supplier, after you do some more meter work.
    It's either wired wrong internally or the terminals are not identified properly.

    Pay attention to what Richard wrote.
  28. Replies
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    1,980

    Most all the water sourced HPs I have anything to...

    Most all the water sourced HPs I have anything to do with start having problems below about 60-65 degrees entering. In some locations we have had to add heat to the loop, bringing it up to 70, to...
  29. Replies
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    2,014

    Have done it many times, when I am given a...

    Have done it many times, when I am given a 2-10VDC actuator to run on an existing 4-20mA loop.

    You simply end up with the 500 ohm resistor in series with the 4-20 mA and read the voltage drop...
  30. Replies
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    1,230

    Use the correct gaskets, clean and lubed as it...

    Use the correct gaskets, clean and lubed as it goes together, then properly treat the water and you should have no problem.
  31. Replies
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    1,096

    What I did was open up the case and find the...

    What I did was open up the case and find the manufacturer of the board, and then got in contact with them on the web. The guy who designed the board is on his own, now.

    I seem to recall the name...
  32. Replies
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    443

    P8 but no faults on outdoor board.

    Advice, insults, laughter, threats, all gladly accepted.
  33. Replies
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    3,842

    Yes it is. There's a pot on the circuit board. ...

    Yes it is. There's a pot on the circuit board. They just don't tell you about it.
  34. 3 tons would be 36,000 BTU. 20,000 is like a ton...

    3 tons would be 36,000 BTU. 20,000 is like a ton and two thirds.

    I hope your contractor verifies the true capacity before he orders the compressor.
    Another possible bite might be if the...
  35. Replies
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    2,928

    It is my understanding that Carrier accepts...

    It is my understanding that Carrier accepts Emkarate POE 68 as an alternative to their OEM POE 68. Somebody correct me, please, if I am in error.
  36. I also seem to recall DC output from the board,...

    I also seem to recall DC output from the board, like to the reversing valve coil.
    I may be confusing this with another McQ board in some ClimateMasters.
  37. Replies
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    1,929

    We were looking at such a system for a new...

    We were looking at such a system for a new building that ended up being postponed.
    The ventilation design engineer got real nervous when I asked him how much extra dehumidification he had to build...
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    1,929

    If you guys on the east coast can make them work,...

    If you guys on the east coast can make them work, I'm impressed.

    How often do you make indoor rain?
  39. Replies
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    548

    Happy New Year back at ya. And i strongly...

    Happy New Year back at ya.

    And i strongly agree with your tag line...
  40. We had a guy come in and resurface a 3 inch shaft...

    We had a guy come in and resurface a 3 inch shaft in place with some kind of whiz-bang epoxy stuff. As far as I know, it's still running smooth after five years or so. He had a portable mold thing he...
  41. Replies
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    2,184

    If it's forward incline like a typical squirrel...

    If it's forward incline like a typical squirrel cage then it rotates that same direction,

    If it's backward incline or "non overloading" it's the other way around.

    If it's radial vanes...
  42. Don't forget Clever-Crooks.

    Don't forget Clever-Crooks.
  43. Replies
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    1,144

    A Minimate with the SCR reheat would also do it,...

    A Minimate with the SCR reheat would also do it, but if you can get a hot gas setup to work for you it would take less energy. you might consider some sealing up of the room.
  44. Thread: PU24EK3 LED7

    by Randy S.
    Replies
    2
    Views
    1,226

    No, it's a cooling only unit. Hasn't P8'ed me...

    No, it's a cooling only unit.

    Hasn't P8'ed me since I changed the run cap.
  45. Replies
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    1,770

    Get the fat ones a sweatin' and the skinny ones a...

    Get the fat ones a sweatin' and the skinny ones a shiverin'

    Welcome to commercial buildings/adult day care.
  46. Replies
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    888

    Oh, the memories... Don't stack it up.

    Oh, the memories...

    Don't stack it up.
  47. Thread: PU24EK3 LED7

    by Randy S.
    Replies
    2
    Views
    1,226

    PU24EK3 LED7

    Had a PU24EK3 go out on P8, found leaks, repaired, no fault codes on the outdoor unit. Topped off the charge, very carefully.
    .
    Went out again, P8, still no fault codes. Replaced run cap today, and...
  48. Replies
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    858

    The reset relay definitely needs to be of a...

    The reset relay definitely needs to be of a higher impedance than the run relay.

    Even with an AC coil, you can determine that by resistance measured with a DC powered meter. About two to one, I...
  49. Replies
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    1,022

    Recently, I witnessed a "steam expert" fit in a...

    Recently, I witnessed a "steam expert" fit in a F&T trap sideways, and then wonder why it didn't work.
  50. Replies
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    1,022

    They better have an approved heat exchanger...

    They better have an approved heat exchanger between the house steam and the oven or it's a big ticket, providing of course, that there is a local inspector with enough savvy.
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