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  1. #1

    Inifinity Humidity Control Possibly INOP

    Condensing Unit: Carrier 25HNB636A003
    Evaporator/Blower: Carrier FE4ANF005T00
    Thermostat: Carrier SYSTXCCUID01
    Air Cleaner: Carrier FNCCABCC0021

    Thermostat owners manual states that: "The system dehumidifies by activating the cooling equipment - even after the cooling temperature is satisfied. The system will not cool to dehumidify below 70F in order to protect the equipment.

    Is this outside or inside temperature?

    This morning outside temp was 66F, inside temp 76F, set point 76F and humidty 50%. Humidty set point is 46%. Should the system come on to lower humidity to 46%?

    Cooling Mode set to COMFORT, Anticipator at default value of 3, no offsets applied.

    During high temps outside the system has no problem maintaining 77F set point with inside humidity floating between 41% and 43%.

  2. #2
    Join Date
    Jun 2003
    Location
    Madison, WI/Cape Coral, FL
    Posts
    6,538
    Quote Originally Posted by Discofuel View Post
    Condensing Unit: Carrier 25HNB636A003
    Evaporator/Blower: Carrier FE4ANF005T00
    Thermostat: Carrier SYSTXCCUID01
    Air Cleaner: Carrier FNCCABCC0021

    Thermostat owners manual states that: "The system dehumidifies by activating the cooling equipment - even after the cooling temperature is satisfied. The system will not cool to dehumidify below 70F in order to protect the equipment.

    Is this outside or inside temperature?

    This morning outside temp was 66F, inside temp 76F, set point 76F and humidty 50%. Humidty set point is 46%. Should the system come on to lower humidity to 46%?

    Cooling Mode set to COMFORT, Anticipator at default value of 3, no offsets applied.

    During high temps outside the system has no problem maintaining 77F set point with inside humidity floating between 41% and 43%.
    The inside temperature is the reference. The unit will overcool 3^F in an attempt to dehumidify but no lower than 70^F inside temperture. Reading the literature and advertising leads one to believe that you can set the control and get dehumidification to set point.
    I have an infinity also. If you want <50RH during low/no cooling loads, get a small whole house dehumidifier like the Ultra-Aire 70H connected to your infinity a/c. I set the UA to 50%RH and the a/c to 75^F, getting the results I want without any over-cooling regardless of the cooling load. Also I get <50%RH with the a/c setup when the home is unoccupied.
    Regards TB
    Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
    Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
    Use +Merv 10 air filter. -Don't forget the "Golden Rule"

  3. #3
    So if the houses humidity is higher than the set point the system will begin a cooling cycle to attempt to lower the humidity. Is this statement correct? Or does the system wait for a cooling demand then run until the desired humidity is achieved?

  4. #4
    Join Date
    Jun 2003
    Location
    Madison, WI/Cape Coral, FL
    Posts
    6,538
    Quote Originally Posted by Discofuel View Post
    So if the houses humidity is higher than the set point the system will begin a cooling cycle to attempt to lower the humidity. Is this statement correct? Or does the system wait for a cooling demand then run until the desired humidity is achieved?
    If the temp is at the set point or within 3^F of the set point, the a/c cools to dehumidify until the temp of the room is 3^F below the setpoint or the %RH is reached.
    Regards TB
    Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
    Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
    Use +Merv 10 air filter. -Don't forget the "Golden Rule"

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