@GrayDav4276 That doesn't sound correct in my experience. Try this:
In a room with the heating off, take note of the current temperature in Tado, e.g. 20.5ºC.
Manually set Tado in that room to be about 0.3ºC higher, so 20.8ºC in this case, you will hear the SRV motor operate for a split second, i.e. not fully opening the valve. If you then increase the setpoint by several degrees, e.g. to 25ºC, you'll then hear the motor operate for much longer, e.g. fully opening the valve.
@GrayDav4276 I've just read your email from Tado, and I do think whoever wrote that response is wrong when they say "It does not "partially open" the valve".
Imagine room A is calling for a high heat demand (maybe the heating has only just been turned on in that room), and room B is calling for a light heat demand (as the heating has been on for a while and it is just maintaining the current temp).
Without the SRTs being able to partially open the valve in room B, it would need to be fully opening and closing the valve every few seconds so that the radiator stays warm and not hot, or it would need to modulate the boiler but this would then cause room A to heat up too slowly. In my experience, neither of these occur, so it must be opening the valve partially.
@jcwacky I did an exercise which I thought categorically showed that partial settings were being used. I chastised myself when I read tado message!
Hey @jcwacky & @samd ,
I'm "Fully Open" (just a little pun....sorry) to the SRT's being able to 'partially open' the radiator valves.......if they don't operate that way......then their functionality is extremely limited indeed.......in fact pretty useless imho.
What I find very distressing is the fact that a member of Tado Support would issue a response that is (apparently) a total misrepresentation of this Tado device operability.
I'm beginning to get even more disappointed with not only the "TRUE" functionality of the Tado system.....but also the level of Tado Support.
I am considering raising this with Tado Support......to see what type of response they will provide......☹️😤
A couple of months ago I fitted a Tado system in my home together with over a dozen Tado TRV's. Personally I am very pleased with the system overall (significant savings already apparent), but would be very keen to see further technical developments.
The majority of my Tado valve actuators were installed in the horizontal plane. I did fit all new valves in addition to the new Tado actuators for the sake of reliability. I have noted that the few that I have installed vertically are significantly affected by radiant heat from the radiator. This results in false high temperature indication and with specific reference to this post - more active valve actuators - which are responding to the temperature of the air immediately adjacent to the radiator.
Based on observation; in order to minimise the frequent control actions of the Tado valves I would agree that fitting a separate wireless temperature sensor (available from Tado - at a price) to those rooms (such as bedrooms) where the noise made by the actuators is an issue or fitting the valves in the horizontal plane so that they are much less affected by the radiant heat from the radiator. I have only one room that is controlled only by a separate sensor and the Tado valve actuators in that room are a lot less active. Personally I don't find the noise made by the actuators an issue, but appreciate that there are those who do.
Setting the bedroom temperature set point to drop a couple of degrees at bedtime might also help if actuator noise is mainly an issue when trying to get to sleep. The valve(s) in that room will immediately close and you will hopefully be fast asleep by the time they decide to open again.
Finally, there seems to be some debate on this post as to whether or not the valve actuators can open partially. They do indeed. The percentage that they are open (for only those that are open to any degree) can be seen by clicking on the "Care & Protect" tile on the home page.
Deleted - error my part
Yes.... to noisy! For Bedrooms not acceptable!
I suppose a work around would be to fit a standard trv on the opposite end of the radiator instead of the lock shield and set it to the preferred bedroom temperature and only use the Tado valve as a simple on of valve to turn off the heating during the day by setting the bedtime temperature very high and the daytime temperature down to your preferred set back level.
But this does seem to be a terribly wasteful use of the Tado valve by limiting it's functions.
I just thought of a possible workround for the noise problem; the aim is to have the valves remain fully opened during the night so that there is no noise during the morning when the radiator starts to heat up
There is an option to select a zone controller for each room
If you select "no zone controller" and set the schedule for that room to be a warm temperature from a few minutes before your bed time till the time after you wake up, the valve will be opened for the entire night; now, if you have at least another room calling for heat in the morning, that will make the boiler turn on and also heat your bedroom because the trv is already open
@GrayDav4276 yes, when I set the TRV in the bedroom to the temperature I want it to reach the next morning, it opens fully, then when some other radiator calls for heat, water starts circulating in the radiator and there isn't any noise coming from the valve itself (as it's already open)
@Jacopo2 Exactly how I have mine setup. Bedroom valves open up at about 19:00 when the heating is off for the day anyway, then the main thermostat kicks in in the morning before we get up and warms the bedrooms and the rest of the house together. No noise as they are open before we go to sleep and are already open in the morning.
Not that I find them loud to be honest but I have had it setup this way from the beginning.