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Air Handlers With Fan On Bottom

 
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Old 01-20-2018, 01:23 PM   #1
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Air Handlers With Fan On Bottom


I'm going through miserable experiences I've had 2 brands both systems pulled, American Standard and Rheem both top of the line variable speed heat pumps.

One thing I can't find out on my own is which brands if any other than Trane and AS have the air handler fans on the bottom. If you're curious as to why 2 systems have been pulled I'll tell you but it might be a rather long explanation. I've been dealing with this since July 2016.
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Old 01-20-2018, 09:04 PM   #2
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Re: Air Handlers With Fan On Bottom


Electronic Variable speed Drive producing "dirty" voltage which eventually damages electronics and motors? And controls?

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Old 01-20-2018, 09:47 PM   #3
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Electronic Variable speed Drive producing "dirty" voltage which eventually damages electronics and motors? And controls?
I'm assuming by that statement you don't care for these systems?
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Old 01-21-2018, 04:48 AM   #4
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Re: Air Handlers With Fan On Bottom


"digital"/ electronic -Variable speed motor drives are awesome if they don't send "dirty' EMF back on the Grid or into one's home power supplies...


Even large power plants have been having formerly trouble free turbo generators bearing failures caused by ground loop currents induced from stray VFD voltage harmonics....

Dare I say anything about our favorite Part time power, Wind mills....and their very large VFD effects on the Grid...

If one is working a EVFD, make sure all the filter coils and chokes are reinstalled after any maintenance, and the filter Capacitors are functional.

Around here, Heat pumps are mostly a rebate driven market: when the Tax and or Mandated spending by Utilities is abolished, sales locally will drop to near zero, Too many really cold days here, = too many hours on electric heat.....
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Last edited by Fouthgeneration; 01-21-2018 at 04:53 AM. Reason: spelling
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Old 01-24-2018, 04:56 PM   #5
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Re: Air Handlers With Fan On Bottom


What is the significance of the fan being on the bottom?

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Old 02-07-2018, 05:02 PM   #6
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Re: Air Handlers With Fan On Bottom


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Electronic Variable speed Drive producing "dirty" voltage which eventually damages electronics and motors? And controls?
Seldom have that problem with VS ECMs. And there are chokes that can be put on them.


So OP, what is the problem.
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Old 02-07-2018, 08:52 PM   #7
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Re: Air Handlers With Fan On Bottom


Fortunately, I haven't had any serious issues with v/s blowers. Chokers? Why, are there regular issues with dirty voltage, spikes, and harmonics? I've heard of these terms. But they never have plaid a real role.

I am pretty sure Goodman, and Carrier/Payne have the fan on the bottom. I too wonder what the details are. Both brands are fine.
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Old 02-08-2018, 05:30 AM   #8
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Re: Air Handlers With Fan On Bottom


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Fortunately, I haven't had any serious issues with v/s blowers. Chokers? Why, are there regular issues with dirty voltage, spikes, and harmonics? I've heard of these terms. But they never have plaid a real role.

I am pretty sure Goodman, and Carrier/Payne have the fan on the bottom. I too wonder what the details are. Both brands are fine.
Goodman and Carrier air handlers have the blower after the coil.

Chokes are more often use to protect the VS ECM. But will also keep noise out of the line of the rest of the house.

https://yorkcentraltechtalk.wordpres...or-ecm-motors/

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