We just had a new Bryant Evolution system installed last Monday, and while I'm mostly happy with it, I'm confused about how it decides when to dehumidify, which is to say that I'm wondering if it's functioning properly.
I have the temperature setpoint at 78 degrees during the day and 76 degrees overnight. Cool to Dehumidify is enabled, with the target RH at 46%. Yesterday morning, after the program had switched to the setpoint of 78, the thermostat was reported a current temperature of 76. When I pushed the right button, the display showed that the current RH was 52% (and then it went up a bit from there from my breathing on it), with the A/C showing as OFF.
Why was the A/C off? Shouldn't it have been dehumidifying? The temperature was less than 3 degrees below the setpoint, and the RH was 6 percentage points above the target.
I checked the readout again a little later. With current temperature at 77, the A/C now showed DEHUMIDIFY, as I'd have expected.
Did I have a misconception of how the dehumidification was going to work, or is the unit not functioning properly? In general, I've noticed that the RH often gets away from the 46% target, which I hadn't anticipated prior to the installation. I thought the unit would try to keep the RH right around the target the same way it tries to keep the temperature at its own target.
The system is perfectly capable of maintaining 46% RH, but it's choosing not to.