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Type: Posts; User: chiller-thriller

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  1. Replies
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    Cool pix. How did the flange change out go? Gotta...

    Cool pix. How did the flange change out go? Gotta love tight spaces.
  2. Replies
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    1,151

    rtac isolation valves

    if you overtorque (100 ft/lbs,criss-cross), it will leak from the stem, once you have, its too late
  3. Replies
    6
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    1,350

    cvhe overload

    Had one once, PNL695, would trip overload, almost everyday, would go, reset, start up, test equipment out, nothing. Then, one day, I was there 45 minutes instead of 30, just packed up, walking away,...
  4. back ward condenser fan

    Does the fan go the right direction when it starts alone or simultaneously with the other fan? If so, then your condenser is plugged between the layers. You need to remove the top, and split the...
  5. Replies
    11
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    3,842

    Tube sheet erosion

    Belzona has metal replacing products and procedures to fix that. Not cheap, lots of prep. Have not tried it, procedures require grit-blasting.
  6. Replies
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    6,768

    vane pulling tool

    Here's a puller we made last winter, worked great. Just what you need, another piece of steel to carry upstairs, worth it, some of those gummed up ones can be tough.
  7. Thread: CH531

    by chiller-thriller
    Replies
    16
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    2,184

    Is your control transformer fed from phases A and...

    Is your control transformer fed from phases A and B. This will generate a momentary power loss diagnostic.
  8. Replies
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    2,827

    motor terminals

    have you checked the motor terminal connections, if they're loose or making poor contact, these kind of trips will occur.
  9. Replies
    7
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    3,044

    locked up purge unit

    What does that mean? Can you fix it? Does the customer plan to do with the chiller? keep it? scrap it? The new Earthwise purge puts recovered refrigerant back into the chiller, pretty cool.
  10. Replies
    17
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    2,436

    windmilling fans

    Have you tried cleaning your condensers? Think about it(been through it). If you have a plugged condenser (split condenser), idle fans windmill more quickly as running fans try to do the work.
  11. Replies
    19
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    2,035

    rtaa phase imbalance shutdowns

    Have you checked the motor terminal connections? Are the contactors ok? Poor contact in the motor's power supply will cause these shutdowns. Look for discolored copper and/or carbonand clean it up.
  12. Replies
    4
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    687

    Thanks jayguy, you know, as I typed it I knew...

    Thanks jayguy, you know, as I typed it I knew that was the answer, besides like you say, he can carry up the nitrogen. Thanks, again.
  13. Replies
    4
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    687

    One of our guys recently found a leak; recovered...

    One of our guys recently found a leak; recovered the gas (134a); made repair; had vacuum below 900 microns; then after a vac pump oil change; introduced a couple 3/8 hoses of air(between pump and...
  14. Replies
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    592

    We have a Trane Evacupak, we bought it many years...

    We have a Trane Evacupak, we bought it many years ago. We've rebuilt the pump a couple times, its big and bulky, but with the proper know-how, it works well. What are you guys using?
  15. Replies
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    8,893

    http://i144.photobucket.com/albums/r182/Robdupuis/...

    http://i144.photobucket.com/albums/r182/Robdupuis/RamadaMarlborough090606002.jpg

    http://i144.photobucket.com/albums/r182/Robdupuis/RamadaMarlborough090606001.jpg
    ...
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    677

    What do you like to do with your time off? ...

    What do you like to do with your time off? http://img443.imageshack.us/img443/8348/lfcp101406001gw5.jpgThis is my Happy...
  17. Replies
    8
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    973

    posting multiple pictures

    Okay, I've uploaded some pictures, tried a couple times, somehow the picture size changes, the text isn't right, how do I do this?
  18. Replies
    8
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    973

    multiple pictures

    I'm okay with one picture, but how do you post a series of pics? I can't seem to work this out.
  19. Replies
    58
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    14,284

    Trane rooftop units

    There are manuals available explaining controls, with tables for temp sensor resistance/dc volts, etc to help you troubleshoot. We sell them in our parts store here, I don't know where else. The ones...
  20. Replies
    22
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    2,510

    rtaa low oil flow

    check your sensors, faulty evap temp sensors, comp suct refrig temp sensor did that to me a couple weeks ago, on a new compressor we'd just installed.
  21. Replies
    339
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    45,732

    Winnipeg, Manitoba, Canada ...

    Winnipeg, Manitoba, Canada I've been with the local Trane dealer over 18 years, learned a lot from a couple of good guys. We work on it all up here, but I love low...
  22. Replies
    8
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    1,044

    rtaa staging

    If the unit is set for balanced starts and hours, the compressor with the least starts will be lead, the unit controls need to see the compressor load past 60% to count a start. If the unit is...
  23. Replies
    41
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    2,634

    low pressure vs high pressure

    I love this topic, was thinking of asking the same question, but it would have come out a little different. What the %$@# has everyone got against low pressure refrigeration and refrigerants? There's...
  24. Replies
    11
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    10,323

    condenser approach

    Wouldn't 0 be the optimum approach, as the function of the condenser is to give up the heat? Any temp difference between refrigerant and leaving water would be heat left in the refrigerant. Tube...
  25. Replies
    3
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    718

    The refrigerant is counter-flowing through the...

    The refrigerant is counter-flowing through the co-axial condensers, discharge gas enters the condensers where the water is leaving.
  26. Replies
    3
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    718

    Has anybody else had experience with these? Self...

    Has anybody else had experience with these? Self contained-water cooled a/c unit running 410-A? I've been looking at a couple, they've been installed in an older building, with a cooling tower loop...
  27. Which chiller are you looking at? The cvhe's with...

    Which chiller are you looking at? The cvhe's with the two stage low temp cut-out will malfunction and do this to you. The first contact that switches causes the vane operator to close. These controls...
  28. Replies
    6
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    781

    I can't remember PPM, will have to check...

    I can't remember PPM, will have to check refrigerant. As for the tank, I did this before with a two tank set up, but this supplier says this will do it. Anyway, I think my problem is more the amount...
  29. Replies
    0
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    671

    I've been working on this air cooled carrier...

    I've been working on this air cooled carrier chiller, m/n 30GUN050-E-120PM, s/n 1802F51043. The building controls system starts/stops the machine; picks up an alarm point; and is to reset chilled...
  30. I am considering a high efficiency furnace to...

    I am considering a high efficiency furnace to replace my old induced draft natural gas furnace. I am looking for advice and suggestions on things to consider re: venting materials,placement, and...
  31. Replies
    6
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    781

    We have a B2D4 under contract,can't remember the...

    We have a B2D4 under contract,can't remember the serial#, but its old,1969. Last year, our refrigerant sample report came back with high ammonia levels, and a recommendation to perform the ammonia...
  32. oil sampling

    Thanks for your replies, I guess I should have specified the rth* models. I'm looking for a way to eliminate or at least reduce the foaming, and minimizing contamination. We were concerned about the...
  33. I've been wondering how everyone has been...

    I've been wondering how everyone has been collecting oil samples from the R-22 and R-134A machines. Where do you take it from? Machine running or idle? Has anyone devised something? I look forward to...
  34. Replies
    3
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    967

    I'm looking for info;links to sites;etc... on...

    I'm looking for info;links to sites;etc... on high efficiency purges, molecular sieves, brands and comparison. Anything you've seen, which do you like? Stuff like that, always like the responses,...
  35. Replies
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    887

    To calculate chiller efficiency, or power usage...

    To calculate chiller efficiency, or power usage (KW/Ton), you would need to monitor chilled water flow (GPM),as well as motor supply volts and motor amps. This is a start, if you really get into it,...
  36. Replies
    14
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    1,638

    condenser fan cycling

    Check your condenser temp sensor and connections,etc. I thought liquid temp is used to determine fan sequence. Had more than one unit(RTUA), with circuit 1 wired in to cct2, you won't see at full...
  37. Replies
    5
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    1,579

    Has anyone reading this converted a Carrier...

    Has anyone reading this converted a Carrier 19DK...,or any other low pressure Carrier to run on R123, if so, how'd it go? Would you again? Any special considerations? I'm told its been done with...
  38. Replies
    2
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    975

    I've been wondering about whether an EAC would be...

    I've been wondering about whether an EAC would be anymore effective mounted horizontally at the end of the vertical drop in the return duct than after the turn, up against the furnace, the way I...
  39. Replies
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    1,617

    Have you tried running your sump level a little...

    Have you tried running your sump level a little lower, also could your sump temp cooler, less water, less temp difference, less vaporizing? Up here, 18F is a nice day, a vfd on the fan could help,...
  40. cold?

    I am currently looking for something to show/relate what cold really means, more to come.
  41. Replies
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    5,453

    heat pumps and ceiling spaces

    Don't you just love these. One hour to locate and determine a fan motor burnt never mind to replace it. This is when you learn how much you love central plants.
  42. Replies
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    1,982

    What's going back in the hole?

    At least, it's another Trane. There will be an RTHD screw chiller replacing it. I'd rather see a high effeciency centrifugal, but, oh well. 350 tons or more, water cooled.
  43. Replies
    9
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    1,982

    Thanks for straightening that out, my daughter...

    Thanks for straightening that out, my daughter just showed me how to edit my pictures, will I remember? Any way, at least this one's not being replaced by a Multi-S***
  44. Replies
    9
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    1,982

    Thanks for that tip. Not sure where I goofed here...

    Thanks for that tip. Not sure where I goofed here but I was trying to post three pics of a PCV being removed, I'll have to try again.
  45. Replies
    9
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    1,982

    http://ww2.imagewiz.net/images/hvac1/184384_330-3....

    http://ww2.imagewiz.net/images/hvac1/184384_330-3.jpg[/img]http://ww2.imagewiz.net/images/hvac1/184384_330-2.jpg[/img]http://ww2.imagewiz.net/images/hvac1/184384_330-1.jpg[/img] First time posting...
  46. Replies
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    2,644

    Had an RTAA recently, wouldn't start, display...

    Had an RTAA recently, wouldn't start, display read; auto,wait for need to cool. The leaving chilled temp read 38F. Someone suggested swapping the sensors, when I'd swapped them at the plug/jack and...
  47. Replies
    8
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    1,498

    Thanks for the info, I know it's not a big deal,...

    Thanks for the info, I know it's not a big deal, for some reason manager is using personal safety issues as way out. I think he doesn't want to have to do any more work. I think that we could do a...
  48. Replies
    8
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    1,498

    I've been wondering, does anyone out there acid...

    I've been wondering, does anyone out there acid clean condensers themselves, or do you leave that to water treatment companies? If so, how do you, what type of pump do you use? If not, why not? What...
  49. sensor connections

    Other day RTAA wouldn't start, every thing seemed normal except that the leaving chilled water temp was 40F, entering 78F, no compressors on, some hair brained scheme of swapping sensors to see if...
  50. Replies
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    1,958

    Chillers- most important, good water flow, what...

    Chillers- most important, good water flow, what is the pressure differential across those heat exchangers? Too high of a diff are tubes plugged, too low is strainer plugged? Either exchanger, get...
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