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Posted by Dr. Hardcrab on August 13, 2005, 7:25 pm
>I have a carrier fk4 with a 38tra. The last time it was serviced, the
> tech changed the settings on the air handler's configuration taps in
> response to my asking if there was a setting that would reduce the
> humidity, but the change resulted in the unit running for about 35
> minutes and being off for about 15 and very uncomfortable humidity.
> Before that it was on maybe 13-15 minutes and off about 12-13.
>
> Does anyone know what the best settings should be for removing humidity
> and improving comfort without the unit running for so long? Right now
> it's set as follows:
>
> size: 030
> type: AC
> AC/HP cfm adjust: Low
> on/off delay: 30/90
> yellow and red wires on y/y2
>
> I thought of changing the "system type" to HP comfort or HP EFF, but
> didn't know whether that would be correct with the 38tra.
>
> There's something rattling around in the back of my head about whether
> the yhellow wire should be on Y1 or y/y2.
>
> The other thing it's been doing is blowing out warm air when it first
> comes on. Hadn't been doing that before either.
You don't want to change the system type. You have an a/c. Not a heat pump.
You have to be color blind when it comes to low voltage wiring, but why is
there a red and a yellow wire on Y1???
Best thing to do is tell the guy to put it back the way it was. If it's not
removing the humidity properly, then it is not charged correctly or it's not
SIZED correctly. You could get a Thermididstat (Carrier has them). They will
bring the unit on to remove humidity even if it's cool enought in the house.
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