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Type: Posts; User: archibaldtuttle

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  1. Replies
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    sorry it took so long to get back

    JH

    thanks so much for that reply. I'm sorry I must have missed the notification that you posted it, and then the anti-spam politeness means it doesn't send you another notification that others...
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    Robust TXV

    Sorry, I am probably restarting a thread that has been pounded into the ground a few times but the search function won't let me search TXV, because it has too few letters.

    I'm building a couple...
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    how about this for turbulent flow

    http://www.spirotherm.com/docs/brochures/Speedheat-4A.pdf

    what does your bro in law say. I'm thinking a piece of this in a piece of plastic is a piece of work - i.e. a ready made evaporator, no ....
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    James, tell your brother-in-law he can sleep...

    James,

    tell your brother-in-law he can sleep soundly. I have yet to go postal over refrigeration. matter of fact I'd be glad to buy him a beer (as long as I can have one too). My intuition about...
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    and look at this coaxial

    http://www.doucetteindustries.com/products_evap_coaxial.htm

    So this is my idea in a coil format instead of long and straight. The thing I can't figure out is why do they want to put the...
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    counterflow or countertemp and few more macgyver ideas

    that sounds backwards from what I was thinking in flow terms. Because the subcooled liquid is entering from the condensor, ergo that seems to me to be common flow direction.

    It is, however,...
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    so the entering water sees the exiting R-22?

    so the entering water sees the exiting R-22?
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    Klove, You're talking to a guy who is thinking...

    Klove,

    You're talking to a guy who is thinking from his H experience not his AC. So I'm imagining, probably incorrectly, that the obvious heat exchanger would be like an indirect hot water heater....
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    . . . few rubber bands, bailing twine and bent...

    . . . few rubber bands, bailing twine and bent nails.


    Chillerwisperer --

    or should I just call you Macgyver. Just who I needed to meet.

    So I found some braze plate stainless exchangers...
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    Chillerwisperer - Maybe you could be the...

    Chillerwisperer -

    Maybe you could be the moderator. You've got the moniker for it. Ran out of characters so you couldn't get the "h" in. I hate it when that appens.

    So I have a question for the...
  11. are you playing the trombone or the baritone?

    or is that the kids?
    I don't know what i've done to my computer. I don't see the avatar's, but whenever I log on from somebody elses computer I do. Oh wait, this is refrigeration help, not cyber...
  12. I've got my fingers in my ears

    I'm getting that sinking feeling, but never say die. If I can get a drawing of the evaporator to guide my approach so as not to hit anything I shouldn't, the one thought I have before going the full...
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    are these the breakers for the condensor fans?

    I'm not familiar with the unit but in terms of diagnosis I'm with berg2666. on the fans. Have you checked the start and running amps on each one. Don't know why it would be just in the overnight...
  14. Trane/sporlan TEV hunting, is it constitutional?

    couldn't avoid a passing reference to having taken time off from refrigeration for a half hour this morning to post at my favorite law blog about Heller v. DC, but its back to Brian v. the chiller.
    ...
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    jayguy is the guy

    He will probably chime in, but if you search for threads that "jayguy" has posted on you could send him a PM. It wouldn't surprise me if he responds before you get around to that although it is...
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    sludge and TDs

    Would have to calculate the gpm using pump specs. Maybe I work backwards by pressure drop. I don't have pressure readings at the chiller, but the supply lines are 2" and at the main pumps i have...
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    ...and a movie

    Andy, sorry it took me a full day to get back to this. I appreciate your thorough go through of the scenario I laid out. In particular then to correct the semantic of my discussion, e.g.:



    ...
  18. i chickened out

    from the thousand lbs. plus nitrogen flush but I already had all valves and other junk removed so I probably would have gone for it if I saw your post first. It was only piping so maybe I should have...
  19. Ah, the old mud problem

    That might make a little sense to me given the age of the chiller. I do drain the chiller every year and I haven't been getting gruesome stuff out of it, but maybe unless I agitated or blew some...
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    way to subcool the rhetoric dude

    My emperical low load results coordinate with the scenario you outline Quixote. If I don't mistake, Andy and Jorgas are arguing whether the low suction is enitrely TEV metering or to a degree posed...
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    I say yes

    Yes that is my understanding.




    I haven't worked on hot gas bypass system. Is this a way of keeping the head from getting too high when the TEV is restricting flow?

    Brian

    PS -tried to...
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    no relevant capillary action

    Jogas, sorry we were posting around the same time so I would have brought in your comments as well.

    You said:


    This was my intuition, generally speaking, that aside from lower load because...
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    restriction vs. load, sunbaked not half-baked

    Andy said:

    Sorry, when I'm balancing a long thread and several quotes I'm not sure how you get the effect that names the source of the quote. If I wasn't baked from several days in the sun swaping...
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    and...?

    low load: low suction, low superheat, normal head ?

    and on the condense no condense argument, I'm still waiting to hear if this was the biblical flood. Sounds like the result wasn't stable, was...
  25. what killed the last one?

    got several candidates

    age - 18 years

    dirty condensor but I would have thought that would have shown up in cooling performance rather than compressor failure.

    crankcase heater was factory...
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    are you sure

    do you think it was flooding because of ice back or because of compressor noise or other physical symptoms.

    OK if it was really 40 psi you had neg. 2 or 3 degrees superheat so you would have been...
  27. RX-11 protocol

    right, i checked out the r[x]-11 [and man you can't afford a barrel of that crap] but the general protocol seems to be to put it in with the replacement compressor and then change all the filters I...
  28. that said what about a compatible solvent gas or liquid

    So if air blowing is verboten, I've never seen any reference to a cleaning treatment used prior to reassembly rather than after. That is the thing that confuses me. I see aid treatments for use...
  29. never -ever ever ever drive a motorcar ever again

    I admit, I've got something of the Mr. Toad character going on here and I'm pretty much convinced by your response and my intuition after typing that all out that what they taught in school was...
  30. to blow or not to blow - that is the (burning) question

    so now that the one circuit on this trane chiller is back up and running, I hacked apart the second burned out circuit. Man what a beautiful wreck (shawn mullins song for fans of ecelectic New...
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    I get 9 degrees too

    Depending on your chart and whether it breaks down per degree or in even pound increments, or some of them go by 2 degrees, you get 30 psi boiling point of 7 deg. (or one of my charts shows 29.1 psi...
  32. nail on head

    That is for sure. 80% of the fan-coils were turned off although I have long since discontinued all the zone valves in the units so I was getting circulation throughout the building and through the...
  33. update, adjustment?

    OK, it was the TEV. It is a Sporlan with a replaceable head. So the frig store didn't have the vxp100 head most suited to chiller application but they had a vga head for general air conditioning...
  34. tev failure

    with you there. when i looked at it i noticed corrosion all around the exit of the capillary from the flatpower head as well as around the edges. nothing like rtv. when they outlaw that i'm out of...
  35. TEV adjustment after replacement

    Jayguy,

    I believe I bought the identical valve although the numbers are long gone and hard to find. In theory I could pull the head and thread the new one in which might be handy in terms of not...
  36. pressure, temperature, amps

    got back there today,

    ambient temps 82.6 standing pressure equalized at 115 high and low

    energized the crankcase heaters for a couple hours. pressure went up to 122

    started the unit, got a...
  37. trane by the book, and TEV test procedure?

    Thanks again to Jayguy for the manual for a Trane CGAC chiller.

    While it was hard to come by, it was worth the wait. I have to say that the manual has one of the clearest presentations of the...
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    OEMcetera

    Thanks to Jayguy I now have confirmed this is a 15 ton twin circuit chiller with two Trane (?) Model H 7.5 ton compressors..



    I'd always give OEM a look, but I'm not sure you can justify it in...
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    trane chiller literature

    trying to find specs and maybe a manual for a trane

    CGACC157HBN2222K

    the manual is listed on the tag as a CGAC-M-2CGAC

    I installed this as a replacement for another trane unit, I would...
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