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Type: Posts; User: icy78

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  1. Replies
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    Make sure the controller spring contacts are nice...

    Make sure the controller spring contacts are nice and clean and also their mating surfaces.

    Sent from my SM-G950U using Tapatalk
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    Cool pic! Merry Christmas[emoji106] Sent from...

    Cool pic!
    Merry Christmas[emoji106]

    Sent from my SM-G950U using Tapatalk
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    To the OP. Assuming input is correct, the static...

    To the OP. Assuming input is correct, the static pressure readings are accurate and the delta-t is accurate, then regardless of what the unit claims it's moving CFM wise, it appears to be low air...
  4. Thread: Reverse Return

    by icy78
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    [emoji846]I even spelt yer name rong! Sorry...

    [emoji846]I even spelt yer name rong!
    Sorry [emoji846]

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  5. Thread: Reverse Return

    by icy78
    Replies
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    1,616

    3 likes .....WANE3298![emoji846] Sent from my...

    3 likes .....WANE3298![emoji846]

    Sent from my SM-G950U using Tapatalk
  6. Replies
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    A tankless water heater is not going to get you...

    A tankless water heater is not going to get you hot water faster than a typical tank setup. A water heater stores water at 120 degrees for your use when you need it. With the addition of hot water...
  7. Thread: Reverse Return

    by icy78
    Replies
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    1,616

    If there is too much flow resistance, then the...

    If there is too much flow resistance, then the pump will be running to the far left of its curve and that will give it an early failure. It can lead to recirc of water at/inside the pump. Makes for...
  8. Thread: Reverse Return

    by icy78
    Replies
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    1,616

    They could have high flow on the pipe that wore...

    They could have high flow on the pipe that wore and still be restricted on the two floors that don't have flow which would be a balance issue.

    However, let's say that the flow is correct or low....
  9. Thread: Reverse Return

    by icy78
    Replies
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    1,616

    I'm interested in that you say the piping is...

    I'm interested in that you say the piping is paper thin. That sounds like the pipe flow velocity is too high and wore the pipe.

    Appears to be a overpumped/balancing issue.

    Sent from my...
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    Yeah, like Redman said. Also if you search the...

    Yeah, like Redman said. Also if you search the site on this, you'll find a lot of threads and demonstration videos.

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    That's what I wanted to know. Thanks Sent from...

    That's what I wanted to know. Thanks

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    Hey that's cool! @Wayne3298 @bradluke As...

    Hey that's cool!
    @Wayne3298
    @bradluke

    As balancers, do you guys have input on these?
    Work ok for...say just 1 room (of many) all served by a single zone constant volume heat/cool system?
    ...
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    Cooper Atkins SH66A . I think that's NIST...

    Cooper Atkins SH66A .
    I think that's NIST traceable.

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    I've seen 5k, 3k, and 10k on their equipment. All...

    I've seen 5k, 3k, and 10k on their equipment. All commercial tho.

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  15. Replies
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    How is it that you see 35f SLSH pickup in a self...

    How is it that you see 35f SLSH pickup in a self contained case? Lots of coiled suction line?
    111f at 70 ambiant, is a bit high but I suppose theres some recirc happening?
    Wrong txv? Worn seat? ...
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    Raise the CO to 14-16f and set CI at 37-38f. So...

    Raise the CO to 14-16f and set CI at 37-38f.
    So 14 psi and 33.5 psi.

    Sent from my SM-G950U using Tapatalk
  17. To me, a brief look at your numbers shows that...

    To me, a brief look at your numbers shows that you're under fired.
    You could check your orifice sizes and I would also check and make sure that you pull lo-nox inserts out. Then run your...
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    Ask them why. If it's to protect the...

    Ask them why.
    If it's to protect the compressor....I'd opine that they dont really understand what we've been discussing.

    If it's to keep the evap from having lower pressure than the water side,...
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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
  24. Replies
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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.

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  26. 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
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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
  30. Replies
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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?

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  31. Replies
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    Switch the pumps. What happens? Does it follow...

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

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  32. Thread: Trane aud issue

    by icy78
    Replies
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    376

    Trane will refer you to your local service...

    Trane will refer you to your local service provider.

    Sent from my SM-G950U using Tapatalk
  33. 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...
  34. Replies
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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...
  35. 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...
  36. 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...
  37. 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]

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  39. Replies
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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
  40. Replies
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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?

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  44. 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?

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

    What rundawg said.

    Sent from my SM-G950U using Tapatalk
  46. 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
  47. Replies
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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.

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    Tons of iron and manganese. Boiler no like. ...

    Tons of iron and manganese.
    Boiler no like.

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