3rd part thermostats to be controlled only for ON/OFF?

Hi,
I would like to know opinions on how can i control a 3rd part (non C-BUS) thermostat thru the c-BUS system. I can understand that is not possible to control the temperature but i just want to control the ON/Off function. Something important is that the specific thermostats did not have mains 230V on/off switch but have only a pulse on/off button. One idea is to connect 2 wire in parallel of the on/off pulse button to a voltage free relay and programmed a NEO switch to activate the output of the relay for 1-2sec only so to give the pulse to the thermostat. That is only an idea and i am not sure if this will be correct or the only way.
Waiting for some more advance suggestions. Thanks in advance

 

Can you provide more information on the thermostat you are looking at controlling? Someone may have integrated already and may be able to suggest how best to do this

 

hi conformist,
you are correct, so here is the type of the thermostat, brand warmup model XSTAT.
Actually the on/off press button just short a pin of the thermostat processor to the ground and drive the electronic circuit.
Thanks

 

From what I can see, it may be possible using the method you are proposing. I would suggest you have a very small signal relay as close as possible to the unit and drive the relay coil from a C-Bus relay. You will need to keep the connecting wires from the relay to the unit very short in length (no more than 50-100mm) and keep the wires away from any external wires too. Might also be a good idea to put a twist in the wires to prevent any noise being induced into them. I can't guarantee this will work nor can I guarantee it won't damage the unit but it's worth a shot.

 

hi again conformist,

your idea for a signal relay is good. as you told this propably will be the only solution in that case. so i will try it soon.
Thanks