Mutli zone heating with Toon

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Mutli zone heating with Toon

Postby Merc » Sat Jan 08, 2022 10:18 am

Hi all,
I searched the forums but did not find a similar topic yet.

Has anybody tried to setup use the Toon in combination with this multi zone heating integration for Home Assistant:

https://github.com/tpacri/multizone_generic_thermostat

What this does is provide a possibility to set and control the temperature in individual rooms without having to heat up the master room, where the Toon is installed.
It checks if all the set temperatures are reached and keeps heating the ones which are too cold still until this is the case.

My thought is that a combination of this script with smart TRVs would provide quite a powerful heating system for the whole house (similar to what the Honeywell Evohome does).
I had a quick look at the script and compared it to the CLIMATE integration for the rooted Toon (from cyberjunky on Github github.com/cyberjunky/home-assistant-to ... on_climate). I am not a programmer and was not able to figure out how to integrate the TOON as a device in the multi zone heating script but I assume it won"t be that difficult?

Any thoughts on this?

Thanks,
Merc
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Re: Mutli zone heating with Toon

Postby TheHogNL » Sun Jan 09, 2022 9:49 am

The toon2 provides STRV multi zone setup itself. However it requires a constant water flow from your boiler or district heating as it will not, in that mode, give a commando to the boiler anymore to start heating. So your boiler should be in 'weerafhankelijke' mode (WAR).

For the normale toon function. what do you expect the toon to do? It will simply just give you a current room temperature and a setpoint on which it signal the boiler to start or not. Not more than that. The only value you can set is the setpoint.
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Re: Mutli zone heating with Toon

Postby Merc » Thu Jan 13, 2022 10:30 am

Hi TheHogNL,
well what I am aiming at is that the Toon (and its thermostat installed in the living room) will not really turn off the heater anymore when the temperature in the living room is reached but only once the temperature in ANY of the defined rooms is reached.
I will install TRVs on all radiators and they should close the valve once the set temperature is achieved, meaning no more water flow to this room.
Once ALL rooms have reached their set temperature the TOON should turn off the heating and only turn it on again when the current temperature in one of the rooms drops below the set temperature, where the installed TRV would also open its valve again. So I would like to mainly use the TOON as the heater switch, but reacting to all rooms, rather than just one.

Please let me know if there some logicall thinking error in this. But isn"t this what some commercial systems (such as EVO) are doing as well? Since Home Assistant would manage all the room thermometers (and possibly even the radiator thermostats) I would think this should be possible? And quite a nice setup to get away from this "one room to rule them all" solution.

Thanks,
Merc
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Re: Mutli zone heating with Toon

Postby TheHogNL » Thu Jan 13, 2022 3:53 pm

Hi,
The Toon2 in STRV mode will NEVER turn of the heater. It does not control the heater anymore. It only controls the STRV's based on the room temperature setpoints.
That is what I mean with that you need a constant flowing water from your boiler or district heating. And ofcourse a AVDO to short-circuit the overflow of water.
Not ideal, but that is what it is.

You can ofcourse script around that and, using a opentherm master shield or a simple on/off relay switch on/off the boiler yourself.
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Re: Mutli zone heating with Toon

Postby Merc » Thu Jan 13, 2022 4:17 pm

But the question was concerning a Toon1 anyhow where the option to control the valves is not implemented. Hence the idea to combine those two scripts.
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