Hello,
I am thinking of remotely triggering the heating system in my home. On Google I have found a number of different configurations used by a number of different controllers, so today I opened a chronothermostat to get an idea of how it works. I found out it is a simple two-wire system, in the photo you can see the part which communicates with the boiler (the contacts highlighted in magenta connect to the front-end of the thermostat, which has a timer and two temperature knobs):
So now I have two questions:
from the diagram (highlighted in green), it seems that the thermostat doesn't really "send" data to the boiler, and what I highlighted in blue is just a switch and nothing more. Can anybody confirm it?
Does anybody know if it is a standard configuration, followed by all (or the majority of) brands?
I lost my voltmeter, but I'm curious now: at which tension does it operate?
UPDATE:
Yep, seems to be just a relay! Can anybody help me understand how to interpret those values?
seems pretty much like a simple on/off control. much of the early electronic thermostat were indeed made this way. newer ones have PID's and are able to control the power of the electric element.
That type of wiring is low voltage. The standard is 24 volts AC. Your heating systems seems to be hot water, since you mentioned a boiler. Why do you think it could operate at other than OFF or ON?
There are thermostats that have internet connection ability. Why not see about one of them? That would aslo give you the ability to remotely look at the room temperature.
Paul_KD7HB:
Your heating systems seems to be hot water, since you mentioned a boiler. Why do you think it could operate at other than OFF or ON?
Yep, hot water. I have radiators. I don't know, I thought it would transmit an encoded signal to require the boiler to switch on/off.
So, about the numbers on the relay: I suppose they tell the maximum voltage that can be applied to contacts and coil, am I right?
But what about TV-5? What does it mean?
