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  1. Agguires name was in the news the week of the...

    Agguires name was in the news the week of the election. City of Houston paid out almost a million in settlement. To count him among "trained officer(s)" as timebuilder did indicates the story was not...
  2. My house is full of MBCs. Also new construction...

    My house is full of MBCs. Also new construction in my facility uses MBCs with three phase (Three lines to one nuetral).

    Missing neutral would put the loads in series. Whichever loads resistance...
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    Idk stump it seems like you're advocating for as...

    Idk stump it seems like you're advocating for as little information as possible. If the guy is on site why not have as much info as possible? How do you know when you have a problem? Do you just wait...
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    Id say you're correct. I would tend to focus more...

    Id say you're correct. I would tend to focus more on flow than system static. So you're pump is operating at 35# of differential pressure. What is the flow at that point on the pump curve?

    The...
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    My coworker was on day 2 of 5. Heard it from the...

    My coworker was on day 2 of 5. Heard it from the pilot on the journey back. Bizzare. I was getting dropped off at school as things unfolded. I'll just say I was too young to really grasp it.
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    Will do. Thanks Wayne.

    Will do. Thanks Wayne.
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    I've been logging things so I might have what I...

    I've been logging things so I might have what I need to calculate in that case.

    I don't get to see the plant under high load at night. Covid has brought occupancy way down so even on the warmest...
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    On the path to tyranny. God forbid anyone be...

    On the path to tyranny. God forbid anyone be asked to wear a mask.

    That being said we have an s load of kn95s at our site and I've found in practice having one hanging off my ear 90% of the time...
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    I've been using the part-load data from york for...

    I've been using the part-load data from york for the barrel flows vs DP and interpolating between points.

    As far as the system curve where would I start? Building is three "zones" each with...
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    No doubt need better availability of n95s

    No doubt need better availability of n95s
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    Yes, Vin. So their spittle and/or aerosolized...

    Yes, Vin. So their spittle and/or aerosolized droplets don't fly right into you're open chest cavity. Any person can be pre or asymptomatically carrying any number of viral infections without knowing.
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    +60% of cancer patients die with at least one...

    +60% of cancer patients die with at least one comorbidity.
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    Pump Speed Change Spreadsheet

    I made up a spreadsheet to figure the centrifugal pump curve at reduced speeds. Just punch in the full speed data points on the 60hz line and voila. Just wanted to put it out there if anyone's...
  14. It doesn't sound like water treatment is an...

    It doesn't sound like water treatment is an issue. Is there lift between the tower and the pump? If running negative maybe auto vent not a good option.
    Otherwise how is the air getting in the pump...
  15. 100% employer. All ppe on their dime.

    100% employer. All ppe on their dime.
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    I notice it more on what I assume we're sketchy...

    I notice it more on what I assume we're sketchy diy threads that got closed.

    Sent from my SM-G973U using Tapatalk
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    I think it becomes a load problem and the valve...

    I think it becomes a load problem and the valve is then oversized and struggles to tightly control but still can keep it close. Also the lower suction pressure is acting on the diaphragm which means...
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    500 is the conversion for gal to pound and min to...

    500 is the conversion for gal to pound and min to hour 8.3x60=500.

    As long as your readings are trustworthy that is the way to measure real time capacity.
    Could be direct flow measurements,...
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    If its leaking air when the compressor is off the...

    If its leaking air when the compressor is off the diaphragm in the unloader is probably ruptured. The valve leaves pressure on the diaphragm until the pump gets up to speed. When the pump is off...
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    You'll probably find it on a spec sheet for the...

    You'll probably find it on a spec sheet for the machine or in with pump information. Could be specific to your machine. Usually given in delta p (ft of head or psi) across the barrel. Delta t should...
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    I was lured into the trade by someone on the...

    I was lured into the trade by someone on the stationary side but worked for a light commercial shop for about 3 years before moving into a stationary apprenticeship. School still ongoing through...
  22. So would it be safe to say it's a battle between...

    So would it be safe to say it's a battle between the density/velocity of the water collapsing into the air pocket and the density/velocity of the impeller material?

    Wayne, when you talk of cold...
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    Looks like a primer to keep the open drain from...

    Looks like a primer to keep the open drain from going dry. I think on a sudden change in pressure it will leak by.
  24. Thread: FANtastic

    by Guyinfield
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    NPSH is what affects cavitation not necessarily...

    NPSH is what affects cavitation not necessarily "high static". I believe the issue with deadheaded pump is more to do with heat building in the impeller and seals because no water Is being moved.
    ...
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    New phone. Had some tapatalk related issues on...

    New phone. Had some tapatalk related issues on old one. Seems like they were phone related.
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    Testing, testing

    Testing...
  27. Benny are you using the clamp attachment on that...

    Benny are you using the clamp attachment on that meter?

    Sent from my SM-G973U using Tapatalk
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    I think they're talking chw temp with the 45. In...

    I think they're talking chw temp with the 45. In the city we had about 10-15 days in July where the WB temp didnt drop below 80 degrees.

    Sent from my SAMSUNG-SM-G891A using Tapatalk
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    There was a thread a while back where someone (I...

    There was a thread a while back where someone (I think it was Wayne) was making the case that all mechanical work is being converted to heat. Any belt/ sheave friction but also airflow friction...
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    Excuse me on this one. My kid is getting pretty...

    Excuse me on this one. My kid is getting pretty good with the phone but not with spelling.

    Sent from my SAMSUNG-SM-G891A using Tapatalk
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    Ghtukcyhmmy FBI gbbnb,9k, ...

    Ghtukcyhmmy FBI gbbnb,9k, ,,!-ehdmRJEHHEHRRH3HEHAUaqh3j3h
    1qfhHeJEEHh


    Sent from my SAMSUNG-SM-G891A using Tapatalk
  32. I never worked residential but started in light...

    I never worked residential but started in light commercial. Go into the shop to "interview" at the end of summer and made a comment like the OP to the shop manager. He looked me in the eye and broke...
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    There will be a major renovation beginning in...

    There will be a major renovation beginning in Nov. that I'm sure will involve vib analysis. I might take the opportunity to compare

    Sent from my SAMSUNG-SM-G891A using Tapatalk
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    Thanks Wayne. We have old (35y.o.) commissioning...

    Thanks Wayne. We have old (35y.o.) commissioning reports and reports after any major work was done on the larger stuff but basically all can be tossed out.

    It would have to be run up the flagpole....
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    Vibration Testing

    I've read that any "cheapo" tester would be a waste of money. Only true pros with elthe right analyzer can really perform troubleshooting, etc. Too many variables I assume.

    That being said is...
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    Sorry didnt see the op posted the chart Sent...

    Sorry didnt see the op posted the chart

    Sent from my SAMSUNG-SM-G891A using Tapatalk
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    V is the code for 22 Sent from my...

    V is the code for 22

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    I think the term is net refrigeration effect and...

    I think the term is net refrigeration effect and it would be the difference between the two enthaly #s you listed

    Side note order up a copy of "pressure enthalpy without tears." recommended...
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    Dont take this the wrong way. Definitely would...

    Dont take this the wrong way. Definitely would need more info than you just offered.

    Sent from my SAMSUNG-SM-G891A using Tapatalk
  40. My understanding is that entering liquid temp is...

    My understanding is that entering liquid temp is a design factor for the valve along with delta p. Temps above or below the design entering liquid temp would decrease or increase the capacity of a...
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    Hadn't even invented wood yet imaging that ...

    Hadn't even invented wood yet imaging that

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    Coast HX5... one AA battery (life on it kind of...

    Coast HX5... one AA battery (life on it kind of short, but like said just one battery). Telescopes a little bit for better view. Solid belt/pocket clip. Small enough to toss in pocket. Under $20.
    ...
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    No doubt a maintenance plus and very cool setup....

    No doubt a maintenance plus and very cool setup.

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    Carrier 6T Blower

    TechmanTerry s thread about an old Trane's plenum blower post reminded me of something I wanted to post but I didnt want to steal the thread...

    Monday we installed a 6 ton Carrier RTU. While we...
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    404a Sent from my SAMSUNG-SM-G891A using...

    404a

    Sent from my SAMSUNG-SM-G891A using Tapatalk
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    We have two carrier 19 EBs circa 1983 on site...

    We have two carrier 19 EBs circa 1983 on site (chugging away) and about 300# of r12 at all times. If the stars align both will be replaced with ymc2s this winter. R12 is not the issue, COP and budget...
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    Westinghouse/Frigidaire Sent from my...

    Westinghouse/Frigidaire

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    Sorry for the lack of update. Have been busy but...

    Sorry for the lack of update. Have been busy but that isnt my problem. Somewhere in the last couple months I misplace the counter I ordered and cannot find it for the life of me. Out of principle I...
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    2nd that on the books. Both books were lightly...

    2nd that on the books. Both books were lightly used at the time but I found Refrigeration + AC Technology to be a great reference later on. Instructors erred on the side of lab (experience) over...
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    Look up the DuPont refrigerant piping handbook ...

    Look up the DuPont refrigerant piping handbook

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