Air Conditioning - Controling humidistat w/air conditioning

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Tomyslady
09-04-05, 03:53 PM
I have a humidistat installed to work with my central air. I was told to keep the humidistat on the (on) postition. But it just keeps running, and the house keeps getting cooler and cooler. So I turned it back up to 65%. How should I operate this humidistat? We keep our temp. at 82.
Thank you,
Lorraine

2cold4u
09-04-05, 04:12 PM
Not knowing any other details it would appear to me that at an 82 degree setpoint the amount of run time would not be enough to remove much moisture. The humidistat will run the unit trying to remove moisture untill it reaches its setpoint. Most design indoor temps are 75 with 50% humidity. At 82 you have set the unit up like it would be if you installed an oversize unit.- Lots of cyclying(sp) but not much in the way of conditioning of the air . If you need 82 for your needs I suggest buying a thermostat that has an adjustable deadband so you can increase your run times buy offsetting the cooling trip point.
Tomyslady
09-04-05, 05:15 PM
So you are saying I should put my thermostat on 75 and 50%? That is too cold, and using alot of electricity, to keep it that cold. What is an adjustable deadband? If I have it set on 82, what should the humidistat be set on? I'm not understanding what you are saying, sorry.
Thank you,
Lorraine

2cold4u
09-04-05, 09:21 PM
well, keeping it simple. 82 degrees is just to high of a setpoint for the a/c to remove ample moisture from the space . Another idea would be to use a digit stat and run the unit based on time, if you were keep the setpoint at 82.
For example run the a/c every 3 hours at 78 instead of 82. Do whatever you can so that the unit has an extended run time. Some digit thermostats have an offset that changes the on/off points in .5 degree increments. This allows the a/c to float as much as 2.5 degrees above and below what you set it at. At 82 the unit would run longer but would stay off longer. Running the fan only on a timed schedule would help even out temp variances.
Tomyslady
09-05-05, 04:45 AM
Thank you, I think I understand now. I will look into a digital thermostat.
Thanks again for all your info.
Lorraine