I'm getting the impression that some of these thermostats are like automatic cameras. You never know what the heck they are doing or why they made the choice they did. For example, why did the camera increase the ISO rather than increasing F-stop?
I've got a couple (basic?) questions that I'd appreciate help with. I've read posts here, but they didn't get down to the (what might be very simple) specifics I was looking for.
Regarding CPH (cycles per hour)... A cycle includes the on time and the off time. If CPH = 3, then a cycle will be 20 minutes. But how much of that cycle must be on and how much must be off?
Is it possible/common that a cycle is 100% on and 0% off? For CPH=3, is 20 minutes of on time possible? Is there any requirement that the system must be off during a cycle?
How does a thermostat like the Trane/Honeywell 803 with humidity control effect CPH? Which has higher priority? CPS or reducing humidity? For example, will the thermostat change CPH on the fly to deal with humidity (perhaps go from CPH=3 to CPH=2)? Or is CPH fixed (at whatever setting the installer specifies) and humidity control just changes on long the "on" portion of a cycle will be?
The manuals don't address this type of info, as far as I can tell.
Also, how does the thermostat's "wait" (compressor safety) play with all this? If the compressor must stay off for at least 5 minutes once turned off, how does that effect CPH? Here is an example. Assume CPH=3. Cycle starts, AC runs for 18 minutes and then turns off. In 2 minutes the first cycle is over (18+2=20). But the 5 minute compressor timer still has 3 minutes remaining. So will the second cycle start but the AC will remain off until 3 minutes into the second cycle?
People say the most efficient system will run constantly, 24 hours a day. How can this occur when, for example, CPH=3 and there is (apparently) required "off" time (plus the compressor safety timer).
Sorry for all the questions. I'd really like to understand this better --- and this seems like the right place! Don't worry about correcting me if I've made an incorrect assumption anywhere.