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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...
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    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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    856

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

    Gunk-itis from non-condensibles?
    Wet system?

    Moon phased wrong?
  11. Replies
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    856

    Wildly fluctuating load?

    Wildly fluctuating load?
  12. Replies
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    4,799

    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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    2,917

    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.
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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.
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    1,516

    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.
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    9,323

    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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    13,792

    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.
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    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
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    637

    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...
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    6,706

    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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    3,307

    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...
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    3,307

    "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...
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    1,004

    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.
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    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...
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