I appreciated how you looked at the building as a whole instead of just fixating on the one piece of equipment and dashing off to the next call. They are getting their value from your approach.
Good stuff Steve O. I am dealing with MUA a lot more dealing g with restaraunts. Trying to learn all I can about them. Those captive aire units are pretty fancy set ups for what they are. Thanks for another good video.
I see situations like this all the time. I know you weren't there to do T and B but I usually check building pressure. The building was probably under negative pressure, especially with the OAU filters being clogged. Either way the dew point and RH are too high and the space temp is too low. There is probably a combo of problems and they can be a pain to get under control without re-engineering the building 😂
Agreed, there are multiple issues. I did explain at the end, I could feel a negative in the building and once I got ahold of captive air I found out the speed settings for all exhaust and supply fans were not as originally set, so someone had changed them. I did recommend a test and balance, and we went back and set the drives accordingly. Thanks, Mark
@@EverythingHVACR So I work in commissioning (including retro-commissioning). Balancing (primarily the lack thereof) is hands down the number one cause of humidity issues. One of my more recent jobs they couldn't seem to keep the humidity below 80%. The plant staff had choked down the outside air convinced the engineer made a typo on the drawings. It was specced for 60 tons to handle 8700 CFM, 7000 of which was outside air. They had it set at around 700 CFM of outside air (there was an AFMS on the outside air duct). What they hadn't done was measure the actual supply flow, because they'd have realized it was moving 12000 CFM, not 8700. The cooling never staged below 90% because it was controlling to leaving coil temperature, and the reheat couldn't keep the space temperature up because it wasn't sized for that.
Even great equipment won't work if not set up correctly. I'm moving to a controls engineer position, working on controls for DOA and other equipment like you commissioning.
@@EverythingHVACR Nice. Commissioning has definitely let me experience first hand that 90% of the shit people blame on the equipment is actually the installer's fault.
Nice Steve…. Working on restaurant HVACR had to be one of my least favorite experiences, don’t miss getting called out late Friday afternoons for problems that were happening all week.
"These metal mesh filters are fragile sometimes"... tosses filter three feet to the side... welp it's bust now. Sometimes it's the only way to get a customer to do basic maintenance. I don't understand the business logic that says to spend say $250K on new HVAC is a good idea and then neglect it until it fails prematurely in 5 years when maint cost would cost nickels comparatively and it would last 30 years. Not that new equipment is built to last beyond the warranty period. It must be a spreadsheet accounting thing or everyone has lost the sense to determine the difference between low cost and good value. Perhaps Sesame Street for kids need to start pushing Cost Value (Cost != Value) skits. Wait... does Sesame St even exist anymore.
Damn! 65 degrees set point? The dew point in the space is pretty low so I can see why the floor is condensating. I had the same problem in my OR Rooms and had to raise the temp up to 70 from 64 to clear it up. The AHU was a 125 Ton 100% Outside Air unit. I live in the SE so humidity is always a factor. Keep a space neutral or slightly positive is the way I deal with it here along with proper save temp control.
I appreciated how you looked at the building as a whole instead of just fixating on the one piece of equipment and dashing off to the next call. They are getting their value from your approach.
Thanks, Jay
Great job Steve
Thanks, Jr
Good stuff Steve O. I am dealing with MUA a lot more dealing g with restaraunts. Trying to learn all I can about them. Those captive aire units are pretty fancy set ups for what they are. Thanks for another good video.
Thanks, Bryan. I like the captive air. The controls are user-friendly, and the tech support is good.
Great information thanks for sharing the video
Thanks for watching, Stephen
Good stuff brudda
Thanks, Jason
Nice work Steve. Thank you for the knowledge.
Thanks, Steven
I see situations like this all the time. I know you weren't there to do T and B but I usually check building pressure. The building was probably under negative pressure, especially with the OAU filters being clogged. Either way the dew point and RH are too high and the space temp is too low. There is probably a combo of problems and they can be a pain to get under control without re-engineering the building 😂
Agreed, there are multiple issues. I did explain at the end, I could feel a negative in the building and once I got ahold of captive air I found out the speed settings for all exhaust and supply fans were not as originally set, so someone had changed them. I did recommend a test and balance, and we went back and set the drives accordingly. Thanks, Mark
👍
🙌
"Was this ever balanced?"
If you even have to ask, 9/10 times the answer is "What is that?"
😆 yeah, it wasn't balanced, and the drives had been messed with
@@EverythingHVACR So I work in commissioning (including retro-commissioning).
Balancing (primarily the lack thereof) is hands down the number one cause of humidity issues.
One of my more recent jobs they couldn't seem to keep the humidity below 80%.
The plant staff had choked down the outside air convinced the engineer made a typo on the drawings.
It was specced for 60 tons to handle 8700 CFM, 7000 of which was outside air. They had it set at around 700 CFM of outside air (there was an AFMS on the outside air duct).
What they hadn't done was measure the actual supply flow, because they'd have realized it was moving 12000 CFM, not 8700.
The cooling never staged below 90% because it was controlling to leaving coil temperature, and the reheat couldn't keep the space temperature up because it wasn't sized for that.
Even great equipment won't work if not set up correctly. I'm moving to a controls engineer position, working on controls for DOA and other equipment like you commissioning.
@@EverythingHVACR Nice. Commissioning has definitely let me experience first hand that 90% of the shit people blame on the equipment is actually the installer's fault.
Nice Steve…. Working on restaurant HVACR had to be one of my least favorite experiences, don’t miss getting called out late Friday afternoons for problems that were happening all week.
Nice job & vid ... Thx
Thanks, Eddy
"These metal mesh filters are fragile sometimes"... tosses filter three feet to the side... welp it's bust now. Sometimes it's the only way to get a customer to do basic maintenance.
I don't understand the business logic that says to spend say $250K on new HVAC is a good idea and then neglect it until it fails prematurely in 5 years when maint cost would cost nickels comparatively and it would last 30 years. Not that new equipment is built to last beyond the warranty period.
It must be a spreadsheet accounting thing or everyone has lost the sense to determine the difference between low cost and good value.
Perhaps Sesame Street for kids need to start pushing Cost Value (Cost != Value) skits.
Wait... does Sesame St even exist anymore.
😆 I’m not sure honestly but you’re right. Dave Chappell sesame street skit is all I can think of now, watch and thank me later 🤣
balanced? was there ever a halfway startup done? probably slammed into place and cranked on without batting an eye. 🤣
That sounds about right 😆.
Damn! 65 degrees set point? The dew point in the space is pretty low so I can see why the floor is condensating. I had the same problem in my OR Rooms and had to raise the temp up to 70 from 64 to clear it up. The AHU was a 125 Ton 100% Outside Air unit. I live in the SE so humidity is always a factor. Keep a space neutral or slightly positive is the way I deal with it here along with proper save temp control.
I agree. I’m in ky near Louisville so humidity is an issue for me too. OAU, is it made by KCC? Looks like a trane?