@Wayne-TP 

Hi Wayne, yes, I use the Smart Control function and have set target tempertures for the full 24 hour period. I have also set one of KE100s in the group as the 'prime' and use that to replicate the Smart Control settings across all 4 KE100s.

I have set up the T315 as the Designated Sensor for each KE100 under the Temperature Correction setting.

I have the T315 set in High Sensitivity Mode for accuracy purposes.

As I say, in principal it all works very well, with the one exception that the KE100s start to close down, in my view, too early i.e. too far away from the target temperature. As a result, the room does heat up and then oscillate up and down but below the target temperature. I can sort of achieve what I want by raising the target temperture by 1 degree but then the system oscillates above the temperture I really want. 

  @Markirl 

Thx for your reply.

Interesting. That is excatly what I expected to happen. In fact, the status does change from heating to non-heating at the correct temperature point. The issue is that even before it reaches the target temperature, you can here the KE100s shutting down bit by bit. So, they might start to close down say 1 degree before target, then close down a bit more 0.5 degree before target, etc. All the while, the status is still shown as 'heating'.

In a lot of ways this does make sense as if they were open fully until the target temperature is reached and then fully closed, the heat in the radiators would result in a significant overshoot in room temperature. Closing down before reaching target would avoid this. To me the issue is more about the point at which they start to close down.

I'd suggest unpairing everything and then recalibrating just one of the KE100's. Then re-pair just that single KE100 with the T315 and see how that works out.

@Wayne-TP Can you confirm if the KE100 is supposed to gradually shut off the valve as it approaches the target temp or is it just a simple fully open/fully closed operation depending on if below or at set temp?

  @Markirl 

I'll give that a go. Thx

  @Wayne-TP 

Hi Wayne, it is not a lot, 0.5C below target is the closest it gets. So, if I set the target 1C above what I really want, then it ends up 0.5C above what I want.

Re  an offset with the T315, because I have selected the T315 in the Temp Correction section as the Designated Sensor, I can't make any offset there and I can't seem to find anywhere in the T315 settings to apply an offset.

To me, it seems as if the KE100 partly closes perhaps 1C before target temp and then fully closes at perhaps 0.5C before target temp. If, instead, it partly closed at 0.5C before target and fully closed at target temp, then the end result would be much closer.

  @Markirl 

I tried your suggestion but the result was the same. Thanks anyway.

  @Grahamu No worries - I'll have a listen out for my KE100's to see if I can hear the valve slightly close in advance of hitting set temp as usually I only hear it when it closes at the set temp.