q1: you are correct, that arrangement can be set up that way (in fact I've done it nearly in exactly that way)
q2: the overriding feature is a bit harder to do. I understand it you want to manually switch the aircon on and off regardless of what the temperature sensor says. How would you in that scenario relinquish manual control back to the sensor I wonder? I guess you could set it up in a parallel way so that there are two paths of electricity to the aircon (one controlled manually by a switch, the other by the th10/16), a switch would toggle between them. When in 'switch mode' another switch could then turn it on and off. Does that make sense or am I getting confused?
Heiko: Thanks for your response. I do understand what you are saying and I have been thinking of a way to wire something like that, but decided that is to much work for the easy of adding the switch. the best way I thought of doing it would be use a switch with 2 points instead of one, then I can set one to turn on and off the side controlled by the TH10/16, then the second point would turn the AC on and off manually. So there is a way I could get it to work thanks using your direction. but at this time just a little to much for me to want to get into.
new related question, due to you have a sim setup. the button on the TH10/16, that is just to manually activate the internal switch right?
Thank you once again for your response and advise.
that is correct, the button acts as an on/off switch, it's inoperable though when you're in the 'automatic' mode (i.e. letting temperature/humidity decide when the switch goes on and off), so the sensor overrides it if in use.