Complicated setup - will this work?!
In my house I have two zones (thermostats) that can individually turn on and call for heat from the boiler.
#1 is day zone
#2 is night zone
Day zone has two rooms, night zone has 3 rooms.
Every room has 1 radiator.
Here’s what I’m thinking to do:
ZONE 1 (DAY AREA)
Room 1:
- smart wired thermostat connected to the boiler zone control #1 (measuring device)
- smart radiator thermostat
Room 2:
- wireless temp sensor (measuring device)
- smart radiator thermostat
ZONE 2 (NIGHT AREA):
Room 3:
- smart wired thermostat connected to the boiler zone control #2 (measuring device)
- smart radiator thermostat
Room 4:
- wireless temp sensor (measuring device)
- smart radiator thermostat
Room 5:
- wireless temp sensor (measuring device)
- smart radiator thermostat
Am I correct thinking this is an efficient setup to individually control temperature in each room without wasting heat or overheating the other rooms?
The most delicate question I have is: if for example Room 2 is in need of heat, but Room 1 (where the smart wired thermostat is) is already at the correct temp, will the smart wireless sensor be able to call for heat and adjust the room, while the smart radiator valve in room 1 remains closed?
Same applies for rooms 4 and 5, in case room 3 is already at correct temp.
Sorry for being long but I’d really like to make sure this setup will work well before making the expensive investment ;)
Thank you
Comments
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Should be fine. I would hold off on getting the additional wireless temp sensors until you see how the trvs work as measuring devices. They’re usually not that inaccurate.
I would try to avoid too much micro zoning unless you have excellent insulation. It’s usually a better idea to keep rooms within a few degrees of each other.0 -
I’d echo the suggestion Johnny has made. It’s easy to get carried away buying expensive equipment. I’d use standard TRVs to limit heat for bedrooms etc and not have more zones.
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Thank you very much for your answers! All clear
another question: I’m attaching the specs of the zone valves type I have for zones #1 and #2
(Caleffi 6442)
are these compatible and will the Tado Smart Wired Thermostats be able to smoothly control them?
Thank you again
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I can not answer on your valve but I will tell you I was hoping to create zone but after installing tado thermostat they have created zone effect regardless. Afterall boiler is running either way system calls for heat.
I decided to step more temp and time thru day with less time off with heating due to poor insulation. My house is floating between 16-20 degrees and got very nice comfort thru all rooms with just one temperature sensor in hallway.
I do get same effect as some rooms used during specific times. Thats for the schedule is for.
Tweaking the setup create a further 5-10% cut on gas usage.0 -
Thank you, yes what you say makes sense.
reason I’m asking this is because these two zone valves are already installed, so I’d like to know if they’re compatible with Tado termostatat or if we need to remove/replace them.
my concern is that tado is a two wire relay system while these valves come with three connectors…
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I don't see why Tado wouldn't be able to control those zone valves, as far as I can see they're no different to those used in Y plan heating setups. Best check with Tado support to make sure though.
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@Gullando22 these Caleffi valves are different to usual because they are driven to open and driven to close. Still compatible with Tado though. You connect the valve's Open wire to NO on the thermostat and connect the valve's Close wire to NC on the thermostat.
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Amazing, thank you so much for your kind and useful answers!!!0
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@GrilledCheese2 sorry one more question… I’ve read the Tado +/- connectors are for modulating mode instead of simple on/off provided by the no/nc/com
since I have these type of driven motor valves that can partially open/close, do you think I could use these connectors to better control the heat request (maybe together with the A connector)?
Or are the +/- only compatible with Opentherm boilers?
attaching the installers manual with all the different setup options
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The short answer is you cannot use the +/- digital interface for your dual zone system.
The digital interface is low voltage and is generally used for direct connection to the boiler. This is a setup with a single heating zone and no motorised valves. When there are two or more heating zones it's necessary to have a motorised valve for each zone, but these cannot be controlled by Opentherm or similar digital interfaces. Some manufacturers have a device which acts as a bridge between multiple Opentherm thermostats and the 230V motorised valves, but Tado does not have this type of device.
Tado is a PID thermostat so it will modulate your boiler to maintain the room temperature. Traditional thermostats will blindly turn the boiler on and off when the room temperature goes above/below the target temperature. The PID algorithms calculate how often to activate the boiler to achieve a room temperature for a stated outdoor temperature. This method is more efficient than traditional on/off control, but (unlike Opentherm) it does not adjust the boiler flow temperature.
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