Trane 2 Ton Heat Pump - high indoor humidity
Hi Everyone, we're from Upstate South Carolina.
I just had a Trane Service Tech over, but I'm not sure we've really solved the problem. This is for a 2 Ton packaged unit that services 1,100 sf. It is 4 years old and is model number 4WCY4024A
The issue is that interior of our house is at least 60% humidity when we set our HP at 72-74 degrees. This seems at least 5 percentage points too high from everything I've read. This has come up because we would like to lay hardwood flooring, but want to make sure our environment is as stable as possible. According to my wife, the humidity has always been very high. She's more sensitive to these things.
Here are the facts that I established today:
-The refrigerant is full
- There is a 15 degree difference in temp between the inflow and outflow. It was 59-degrees on the cool side and 74 on the warm side. The tech said the difference in temperatures should be greater (he might have said 18 to 25, but I don't recall). He didn't really know what to do about it.
- Static pressure is 0.5 higher than spec, but should be close enough to not matter
- Dip switches #5 and #7 are in the up position, the rest are down (out of a total of 8)
The Tech didn't know anything about modifying dip switches to optimize humidity reduction. He called around, but even the Trane dealer tech said that he never messes with the factory settings, and that 5 and 7 up is correct for the 2 Ton packaged unit.
At the bottom of pg 5 here:
It gives some tables on the dip switches, but I'm unable to translate what they mean.
Does anyone here know anything about this? Is there a way we can reduce the humidity by optimizing the blower settings via dip switches?
I'd be very grateful for any advice you may have.