I have a one year old Geo system that is performing fantastically but am having trouble getting proper control of it through the thermostat to use it most efficiently. it was installed with a Honeywell VisionPro thermostat that I quickly realized was not really suited to it and was obviously designed with conventional heat pumps in mind. I had the dealer install a Climatemaster which has many more control options and now I'm trying to experiment with them and find the best options for our needs and the abilities of the system. The installation manual has reasonable descriptions but either I am misunderstanding them, they don't work as described, or perhaps the optional functions are stepping on each other.
For starters, I am using the differential temperature algorithm with the differentials set at 1-3-4. By my understanding this means that if the set point is 69, the unit should use first stage heating at a temp of 68, second stage if the temp drops to 65, and auxillary electric if it falls to 61. But the system is using second stage if the temp is 67 or below. The first number works like I expect. For example, if I change it to 3, the system won't call for heat until the temp drops to 66 from 69, but the second number doesn't seem to be working. I do not have smart recovery on at the moment and I don't see anything else that should override the differentials? Can anyone help? I have a BS in chem and a minor in Physics so don't be afraid to be technical.