using thermostat in cool/heat mode

I have a two separate HVAC systems with plants that are capable of both cooling and heating. Each system is controlled by a 4-zone programmable thermostat. My home is experiences wide temperature variations and cooling is often needed during the day while heating is needed at night.

I would like not to have to switch the system between cooling and heating at least twice a day.

How to achieve that?

1. I tried setting up the thermostat on cool/heat but it is very inefficient because it tries to keep the temperature within a much too tight temperature band and runs much more than needed. I would be happy if the temperature stayed within 2 C instead.
2. I look into using the set back function but the narrower temperature band it can be set to is 4 c. I think this is too much variation. Especially because there is at least 1C if difference in temperature within the home si the effective temperature variation is more like 6 C. (also I would like the fall back function to be available when the home is unoccupied).

Is the a solution?

For example:

1. Is there a way to set up the thermostat to do what I want ?
1. Should I play with the PID parameters?
3. Can I use the wiser to remotely switch over the thermostat from cool to heat and adjust the temperature setting (I never look into that).
4. Can it be done from a PC running Cgate (I have never used C-gate).

Thanks

 

You could write some logic code to change the HVAC mode between heat and cool. It would probably be quite simple, but needs a bit of thinking first to make sure you come up with the right algorithm.

 

I guess that means that parameters such as heating/cooling mode, current temperature and set temperature are accessible and modifiable from program logics, correct ? (i have never checked but if it is the case, I am confident I will manage).

 

These are all available via In-built System IO Variables.