Q: How do I switch DZ into heating or cooling mode?
A: For cooling, values of P and I for the PID controller associated with the thermostat have to be positive, for heating, negative.
IMPORTANT: Make sure that P and I values for all thermostats are on the same side, and that they are synchronized with the operation of the actual HVAC device, or you will have a runaway condition in zones that are on the wrong side. In other words, your HVAC will run forever.Q: Why is it so complicated?
A: Because it makes things much, much simpler in the bigger picture, the time for which hasn't come yet - but I'm working on it.
Q: Are you ever going to make it so normal people can use it?