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  1. Replies
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    Running in a vacuum causes scroll failure or I...

    Running in a vacuum causes scroll failure or I should say scroll compressor failure, by causing a short at the fuseite connections.
    Is that because there's no cooling effect and the Heat at...
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    It's always a tough sell telling people that youd...

    It's always a tough sell telling people that youd like to install a tee for combustion air from inside .
    Then you go through the whole battle of, well ....doesn't that reduce the efficiency? ...
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    There is nothing specific about how long a scroll...

    There is nothing specific about how long a scroll will last running in a vacuum. It would depend greatly on the strength of the vacuum to. The AE bulletin simply say not to run a scroll in a deep...
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    I don't know guys, I'm still thinking that if you...

    I don't know guys, I'm still thinking that if you had swapped pumps two and a half weeks ago you would have known right then if it was a pump problem or a system/ electrical problem.

    It is weird...
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    What's it in? Seen a few scrolls with bypass...

    What's it in?
    Seen a few scrolls with bypass timers for cold weather.
    Heatcraft uses em. 2 minute bypassI think .

    Sent from my SM-G950U using Tapatalk
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    My ladder blew down once. Now, I have a bungie on...

    My ladder blew down once. Now, I have a bungie on the top of my ladder all the time. It lightly stretches between a loose, burly ziptie on the 3rd rung down, and the same on the 6th rung down....
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    Curious. How did you happen to have that refer...

    Curious. How did you happen to have that refer identifier?
    Not a common tool I think.

    Sent from my SM-G950U using Tapatalk
  8. Replies
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    With that 134a txv it may have 134a in already...

    With that 134a txv it may have 134a in already then?
    Some one changed the txv.
    The velocity in close coupled cases will allow you to run 134a with no oil change.
    At least I've found that to be...
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    401a (mp39) is very common around here. It works...

    401a (mp39) is very common around here. It works well.
    That's pretty old system there, so can you go with 409a? Or hotshot maybe, so you can stick with mineral oil?
    Otherwise switch to 134a. Be...
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    LOL! Sent from my SM-G950U using Tapatalk

    LOL!

    Sent from my SM-G950U using Tapatalk
  11. Replies
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    [emoji106]What will you be learning? Sent from...

    [emoji106]What will you be learning?

    Sent from my SM-G950U using Tapatalk
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    Did you try switching the pumps or is that not...

    Did you try switching the pumps or is that not feasible here?

    Sent from my SM-G950U using Tapatalk
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    Switch the pumps. What happens? Does it follow...

    Switch the pumps. What happens? Does it follow the questionable pump?

    Sent from my SM-G950U using Tapatalk
  14. Thread: Trane aud issue

    by icy78
    Replies
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    290

    Trane will refer you to your local service...

    Trane will refer you to your local service provider.

    Sent from my SM-G950U using Tapatalk
  15. Replies
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    Curious...where is this cavitation possibly...

    Curious...where is this cavitation possibly happening? In the coil after the 2-way? Flashing from the sudden pressure drop?

    How does vena contracta function in a small pipe?

    What is 'recovery...
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    225 is too close. That's 300 at the valve. Oil...

    225 is too close. That's 300 at the valve. Oil cooking territory.
    I dont like over 200 either. VERY rarely do I leave something running at over 200f DLT.
    Rarely do I see over 195 on the stuff I...
  17. That's a tiny MUA. Probably everyone was...

    That's a tiny MUA.
    Probably everyone was thinking at least 6-12000 cfm.
    Also, are you sure it doesnt use some return air?
    Altho 1500 18 is only about 80cfm per apartment, so it's probably sized...
  18. IMO, you need a good tech, who can also think...

    IMO, you need a good tech, who can also think like a mechanical engineer.
    Or a good mechanical engineer, who has a tech who can make the ME's design work properly.

    Sent from my SM-G950U using...
  19. It needs to be looked at by someone who can "see"...

    It needs to be looked at by someone who can "see" the whole building picture. Mechanical as well.
    Small MUA savings realized by lower MUA cfm and temperature may become big building $ losses in a...
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    Haha! Maybe I ment , Coogs, has tons of info....

    Haha! Maybe I ment , Coogs, has tons of info.
    Thanks[emoji3][emoji106]

    Sent from my SM-G950U using Tapatalk
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    Googs has tons of info too. John Tomczak can...

    Googs has tons of info too.
    John Tomczak can explain it well.
    You should know about it and measure it. IMO.


    Sent from my SM-G950U using Tapatalk
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    That thing is probably 2 stage? It might be under...

    That thing is probably 2 stage? It might be under fired and causing condensation and rust.

    Or the return air is too cold or too much outside air making the return are too cold. Or it's a...
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    Back drafts can happen sometime/anytime, during...

    Back drafts can happen sometime/anytime, during the 99.99999% that you're not standing there.

    The nature of drafthoods/draft, dictates that.

    Lazer thermometers are only as accurate as the...
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    A guy I sort of know went. 2 days, hands on, 1...

    A guy I sort of know went. 2 days, hands on, 1 day of intelligen. (About 6 hours he said.)
    I've done 1 Intelligen system. Pretty nice.
    He said you learn some really handy tricks you may not know...
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    How was the downdraft issue corrected? Sent...

    How was the downdraft issue corrected?

    Sent from my SM-G950U using Tapatalk
  26. Replies
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    Heatcraft intelligen

    Anybody here take the Heatcraft 2 day class on QRC/BEACON/INTELLIGEN?

    Is the test after only on Intelligen, or Beacon and QRC also?

    Sent from my SM-G950U using Tapatalk
  27. Replies
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    What rundawg said. Sent from my SM-G950U using...

    What rundawg said.

    Sent from my SM-G950U using Tapatalk
  28. Replies
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    Great points! Also, were all other appliances...

    Great points!

    Also, were all other appliances gas valves off at clocking time?

    And, it's hard to be accurate with single point readings.

    Sent from my SM-G950U using Tapatalk
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    You should try getting a reading at the first...

    You should try getting a reading at the first grille. Or after a few duct turns. Mix the air a bit.

    Sorry kdean1, we posted at the same time. I agree, do the things that you said.

    Sent from my...
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    I don't think they go bad without being subjected...

    I don't think they go bad without being subjected to abnormally high heat though. It may not be enough to trip it for a few years but enough to weaken it.
    So there would still be an underlying...
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    I'm betting on a flowcheck issue. Have a look...

    I'm betting on a flowcheck issue.
    Have a look inside it.

    Sent from my SM-G950U using Tapatalk
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    Tons of iron and manganese. Boiler no like. ...

    Tons of iron and manganese.
    Boiler no like.

    Sent from my SM-G950U using Tapatalk
  33. Replies
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    Possible Burner misalignment. Sent from my...

    Possible Burner misalignment.

    Sent from my SM-G950U using Tapatalk
  34. Replies
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    ^^^^ X2, sounds like you're doing a board...

    ^^^^
    X2, sounds like you're doing a board reset.
    Run the cooling and look for issues.

    Sent from my SM-G950U using Tapatalk
  35. Replies
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    That's no fun Terry! Getting New tools IS...

    That's no fun Terry!
    Getting New tools IS fun![emoji846]

    Sent from my SM-G950U using Tapatalk
  36. Replies
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    When it shuts off is it also shutting some type...

    When it shuts off is it also shutting some type of solenoid on the glycol or Water.... whatever is in the floor, and is that what's causing a noise?

    Sent from my SM-G950U using Tapatalk
  37. Replies
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    What is the application? What Chiller is it? It's...

    What is the application? What Chiller is it? It's possible that there are numerous settings to change.
    And as pecmsg said, it may be operating far outside its design.

    Sent from my SM-G950U using...
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    Give it a few years PHM. There will be a list...

    Give it a few years PHM. There will be a list like that for Trump. (like there is for every president).

    They all have to play the same game , they all have to bow to the same lords ,and some of...
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    Turns out it's not quite linear. But very close....

    Turns out it's not quite linear. But very close. Using slip percentage of motor. About 2.2% for 1800rpm motor with 1760rpm label.
    40 1800 =2.2%
    30 hz =50% of 60hz =17602=880
    880- 2.2%=861

    So...
  40. Thread: Fun

    by icy78
    Replies
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    1,187

    If your customers are artists, they probably have...

    If your customers are artists, they probably have shows around your furnace and hydronic work!
    It's a beautiful thing!

    Sent from my SM-G950U using Tapatalk
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    Ah interesting. Can you explain? It's not...

    Ah interesting. Can you explain?
    It's not linear, or is it?
    30hz is rpm of 60?

    Sent from my SM-G950U using Tapatalk
  42. Replies
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    Bluetooth tach with a homemade bracket . clamp...

    Bluetooth tach with a homemade bracket .
    clamp it on close the door take your reading.

    Sent from my SM-G950U using Tapatalk
  43. Thread: Mixing of oils.

    by icy78
    Replies
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    1,055

    Just did an 06E from 22 to 407C. Carlisle wants ...

    Just did an 06E from 22 to 407C.
    Carlisle wants 30% POE.
    RTU 50ton. Theres only mineral oil in there right now. Returning like a champ. But, I disabled it now till next spring. Want to watch it...
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    Hmmm. Good point. But if the unit stages the...

    Hmmm. Good point.

    But if the unit stages the compressors/unloaded to meet supply air STPT too aggressively...itll still be too low cfm.

    Dont know if its done in Carrier algorithm or BAS .
    ...
  45. Replies
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    Yes, I calibrated the static sensor but ended up...

    Yes, I calibrated the static sensor but ended up with a new one. It at least worked, but still off by 0.4".
    Found in config that someone selected 0-3 " sensor range. But these are 0-5". Changed that...
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    Thanks pagey! I mis-remembered...

    Thanks pagey!
    I mis-remembered again[emoji53][emoji846]

    Sent from my SM-G950U using Tapatalk
  47. Thread: Simple 80%er

    by icy78
    Replies
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    1,200

    What draft did you measure? What were the...

    What draft did you measure?
    What were the combustion numbers?
    Sent from my SM-G950U using Tapatalk
  48. Replies
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    Googler.....flexible poolroom/natatorium ducting...

    Googler.....flexible poolroom/natatorium ducting

    Sent from my SM-G950U using Tapatalk
  49. Thread: Simple 80%er

    by icy78
    Replies
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    1,200

    Looks good. I'm wondering if there may be some...

    Looks good. I'm wondering if there may be some draft issues there tho.

    Sent from my SM-G950U using Tapatalk
  50. Thread: -20 f freezer

    by icy78
    Replies
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    471

    Probably need 5" walls? You could add a layer of...

    Probably need 5" walls?
    You could add a layer of well sealed blueboard maybe.
    Other than that you just need to pick a condensing unit to match your load at -30 SST.
    It'll need an oil seperator.
    ...
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