Mgraw
Senior Member
- Location
- Opelousas, Louisiana
- Occupation
- Electrician
I can not envision any scenario where it would be cheaper to completely re-design almost every component of the system.
air handler question
- Thread starter bure961
- Start date
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I can not envision any scenario where it would be cheaper to completely re-design almost every component of the system.
- Location
- Massachusetts
- Location
- Massachusetts
There are calculations to do.
If you are counting on a thermostat placed in a duct to keep the coils from freezing up you will short cycle the compressors.
Mgraw
Senior Member
- Location
- Opelousas, Louisiana
- Occupation
- Electrician
No all you need is an understanding of how a unit works.
Well tell me how.
ptonsparky
Tom
- Occupation
- EC - retired
Sometimes you do not need to calculate. It is like falling off a ladder. You can do the mental calculation of distance, mass, surface tension of striking objects, etc, etc to come to a decision or you remember from previous experience "This is going to hurt."
Perhaps, you are talking about compressors as small as a beer mug! 60/5 = 12 starts in an hour~ 2hp motor!
kwired
Electron manager
- Location
- NE Nebraska
Before slowing the blower down you likely have cooled the space before sufficient humidity was removed for better comfort levels.
Now if you shut down to keep coil from freezing up you may have too much defrost time and not enough run time - ultimately never getting the space cooled enough - comfort level still suffers let alone any energy inefficiencies that come from this.
gadfly56
Senior Member
- Location
- New Jersey
- Occupation
- Professional Engineer, Fire & Life Safety
Where's the OP?
Where's the OP?
It would be nice if the OP would stop back and chime in, considering all the man-hours we're burning discussing his situation. Maybe some basic info, like AC and heating capacities, single or multistage compressor(s), unit CFM, and the volume of the conditioned space. Then we might be able to have something resembling an intelligent discussion.
Where's the OP?
It would be nice if the OP would stop back and chime in, considering all the man-hours we're burning discussing his situation. Maybe some basic info, like AC and heating capacities, single or multistage compressor(s), unit CFM, and the volume of the conditioned space. Then we might be able to have something resembling an intelligent discussion.
mgookin
Senior Member
- Location
- Fort Myers, FL
Adding more supply vents will reduce the amount of air coming out of each vent.
After all these posts, none of us thought of that? Geezy wizz what kind of HVAC forum is this? Oh, it's not!
After all these posts, none of us thought of that? Geezy wizz what kind of HVAC forum is this? Oh, it's not!
gadfly56
Senior Member
- Location
- New Jersey
- Occupation
- Professional Engineer, Fire & Life Safety
Or you could have looked at post #54. Don't worry, nobody else seemed to notice.
- Occupation
- Licensed Electrician
See post #10. The "not a HVAC forum" was addressed a few posts before that as well.
The OP has not stated any humidity problem due to short run. So most likely it would not happen in the proposed retrofit also.
- Location
- Massachusetts
:lol:
- Location
- Massachusetts
Sahib, you can't even identify the type of unit we are talking about.
Maybe I am mistaken, how about you find a picture on the internet of what you think is being discussed in this thread.
Sheaves
Usually a 60-100% adjustment range
http://dms.hvacpartners.com/docs/1009/Public/06/48TC-19PD.pdf
not THE unit but a typical rtu
smallest unit 900-1500 cfm adjustment pg 12
the compressor/controls are sized for this range
Approximate volume of bldg would help
Usually a 60-100% adjustment range
http://dms.hvacpartners.com/docs/1009/Public/06/48TC-19PD.pdf
not THE unit but a typical rtu
smallest unit 900-1500 cfm adjustment pg 12
the compressor/controls are sized for this range
Approximate volume of bldg would help
Last edited:
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