I have a waterfurnace 5, 4 ton, closed loop (3100 sqft house). Having trouble getting humidity below 64. Temp/humidity outside is around 73/99%. I've had the air set between 70-72 trying to get the humidity down, but I can't crack 64%. I turned the fan to auto, which helped some, but not enough. even with outside temps hovering 80 (temp set at 72 indoors still), this thing isn't removing enough moisture. What does it take without freezing to death?? I have a tech coming Fri, I just want some knowledge when he shows up. What should he be looking at to fix this?
How long does the unit run before the stat is satisfied? Is the unit running in first stage or second stage?
You want the unit running longer so it has a chance of pulling out more humidity... running it in first stage will let the unit remove more humidity.
If it runs in lower stage it has lesser capacity, meaning it will not satisfy the thermostat as quick, it will run longer, and thus can pull more humidity out of the air. I would say that the judgement is out whether a unit in first or second stage runs more efficient. The heat exchangers are oversized in lower stage, thus the unit has more efficiency, but your pumping power is proportional larger (per BTU).
Apparently it starts up low, kicks in to high, then winds back down to low for shutdown. I can't even hear the difference or actually tell what stage it's in. My water furnace tech said that the humidity removal was as good as it gets, and tried to sell me a dehumidifier. All I want to know is if this true, or is it set up incorrectly. I live in Florida where there is almost always a humidity problem. It seems that with the rising temperatures (80) it would run more and therefore pull out more humidity. It doesn't. It seems like I have to lower it a degree for every % of humidity I want lowered ~ i.e. this morning I lowered the tstat from 72 to 71 and it pulled another 1% humidity (58%). When I spoke with another WF dealer he said this is the Cadillac of humidity removal and it SHOULD be pulling more. Unfortunately he is not the installer. It has no problem cooling, and hits the mark in under 7 minutes, with a rest time of about 10 min. Is that a normal run time?
Tough to say from the distance, but the unit should not go into second stage, it appears to be set up incorrectly. You can change your differential between the stages so the second stage does not come on.
