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Pat Pat is offline
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Default high humidity with newly installed system


that guy wrote:
I recently had a geo comfort pardyne system installed. i have 3 ton
horizontol loop field with a 2.5 ton paradyne system.

i have air handler in attic (no basement) with everything insulated.

my issue is that my weather station in my house shows R.H. from 53-65%.
I complained to the installer and he had the supply rep come out to my
house with him and they went over everything.

I am getting some condensate from the drain, but not sure how much
itshould be. the thing cools great no problems. the unit is now short
cycling. I checked the coil and there is no air bypassing around the
coil, and even thought the istallers left some blown fiber glass
insulation in duct there was VERY little on coil.

the supply rep tells me that the "TXV" valve is always trying to
balance the freon and where you used to get 20 degree temp drop across
the coil you now get more like 14 degrees and so just can't de-humidify
like the old a/c systems.

he says I should not worry about the R.H., his instruments show it was
around 54%.

I have not paid the installer yet because of this and want to pay if I
should but don't want to if something needs to be fixed because I will
not have a "carrot" then.

I've read where humidty levels above 50% can lead to mold, dust mite
issues, etc. am I just being paranoid and should pay?


I don't remember much about the AC from the days for following my
father around as a commercial AC mechanic, but if I remember right (and
I probably don't), it seems like a 3 ton AC unit is pretty big for a
house. Isn't a ton 12,000 BTU so a 3 ton system would be 36,000 BTU.

If you have too large of a system, it cools the air without moving
enough of it through the system. Say you have 1 system that cools your
house by cycling all of your air through the system every cycle. Say
another system provides the same cooling by moving only 1/4 of the air
through the system in a cycle. The second system provides the same
cooling but doesn't remove as much water.

I believe "short cycling" is what is described as scenario 2, above.
The system comes on for a short time, does the cooling it is supposed
to, and shuts off. It does it on a short on period and a long off
period.

So check with someone and see if the system is sized right. 3 tons
might be way too large, perfect, or way too small depending on the size
of your house, insulation, etc.

Another option is to move up here, outside Buffalo. Lows in the 40s
tonight and highs in the lower 70s tomorrow. What AC? ;-)) Up
here you just open the windows.

Good luck.