MikeC1964
Novice Member
Hello. I hope someone may have some advice for me. Pleas bear with me, it’s my first time and there’s no short way to relate this…
I had a new Baxi 800 combi installed at the end of last year and I was running a Gen 2 Nest with it. I wanted to have more granular control so I opted for Drayton Wiser.
My heating engineer installed the hub for me and on my request connected via the Opentherm module in the hub the Opentherm connections in the boiler (as far as I am aware).He was a little reluctant as he had no real knowledge of either Opentherm or Wiser, but in the Wiser app it does suggest that the Opentherm connection is being used.
Anyhoo, I went for a cautious approach as I have 15 rads I want to control eventually, but I didn’t want to commit to buying Wiser TRVs for all the rads without first having a play with their basic combi kit which consists of the hub, a room stat and two smart TRVs. I initially only installed the room stat as a direct replacement for the Nest and all was fine. I then played with the two smart TRVs to check that I wouldn’t have any connection issues (I live in a Victorian property and the hub is in the attic conversion along with the boiler). Everything fine there, although looking back in order not to disrupt the heating too much for the rest of the household I primarily tested that the TRVs could switch off rads whilst the rest of the house was being heated according to the room stat, rather than them calling for heat. Perhaps my mistake.
I then took the plunge and purchased an additional 12 TRVs and started rolling them out over the weekend and setting up the schedules. All seemed fine until my wife remarked that the rad in the hall and the heated towel rail in the bathroom were rather noisy. And she was right. They are kettling (if that’s the right term). Neither of these had TRVs to begin with as you would expect (the Nest was in the hall), but now I have rolled out most of the Smart TRVs I can report that some, but not all, of the smart TRV controlled rads also kettle.
I spoke to Drayton Wiser and they couldn’t really offer any solution. They checked the logs and noted that the ‘requested’ output temperature was around the 55 degree mark, but as to why the rads are kettling is best to be discussed with my heating engineer. I don’t know what the output temp was set to before the new hub was installed (I believe Opentherm now controls this and not the boiler?).
I will of course discuss with my engineer, but as he was not that confident with Opentherm as mentioned above, I thought I would turn the the internet community and see whether there are any suggestions here. I have bled all of the radiators, just to be sure. Most were fine.
Thanks,
Mike
I had a new Baxi 800 combi installed at the end of last year and I was running a Gen 2 Nest with it. I wanted to have more granular control so I opted for Drayton Wiser.
My heating engineer installed the hub for me and on my request connected via the Opentherm module in the hub the Opentherm connections in the boiler (as far as I am aware).He was a little reluctant as he had no real knowledge of either Opentherm or Wiser, but in the Wiser app it does suggest that the Opentherm connection is being used.
Anyhoo, I went for a cautious approach as I have 15 rads I want to control eventually, but I didn’t want to commit to buying Wiser TRVs for all the rads without first having a play with their basic combi kit which consists of the hub, a room stat and two smart TRVs. I initially only installed the room stat as a direct replacement for the Nest and all was fine. I then played with the two smart TRVs to check that I wouldn’t have any connection issues (I live in a Victorian property and the hub is in the attic conversion along with the boiler). Everything fine there, although looking back in order not to disrupt the heating too much for the rest of the household I primarily tested that the TRVs could switch off rads whilst the rest of the house was being heated according to the room stat, rather than them calling for heat. Perhaps my mistake.
I then took the plunge and purchased an additional 12 TRVs and started rolling them out over the weekend and setting up the schedules. All seemed fine until my wife remarked that the rad in the hall and the heated towel rail in the bathroom were rather noisy. And she was right. They are kettling (if that’s the right term). Neither of these had TRVs to begin with as you would expect (the Nest was in the hall), but now I have rolled out most of the Smart TRVs I can report that some, but not all, of the smart TRV controlled rads also kettle.
I spoke to Drayton Wiser and they couldn’t really offer any solution. They checked the logs and noted that the ‘requested’ output temperature was around the 55 degree mark, but as to why the rads are kettling is best to be discussed with my heating engineer. I don’t know what the output temp was set to before the new hub was installed (I believe Opentherm now controls this and not the boiler?).
I will of course discuss with my engineer, but as he was not that confident with Opentherm as mentioned above, I thought I would turn the the internet community and see whether there are any suggestions here. I have bled all of the radiators, just to be sure. Most were fine.
Thanks,
Mike