PLATINUM 40 COMBI ERP Radiators always heating

[newbie910]

I'm confused, which is it? Obviously we are 5 months on now.

This all needs electrically tested and the switching live out (240V) from the boiler needs to be traced around the system. It also needs checked at the wiring centre above the UFH controller. There should be a common switched live back to the boiler (blue). The UFH controller should have it's own live and shouldn't be using the live out from the boiler.

If, as per the original post, the boiler is always getting a signal then that needs to be found - either from the UFH controller or the stat.

The boiler is not heating anymore now after engineer visit to solve constant heating issue.

 

[CountryFan]

Did you decommission the BDR91, or place those wires into the Hive? Does the Hive have power I presume? It might be worth linking out at the boiler.

 

[newbie910]

Did you decommission the BDR91, or place those wires into the Hive? Does the Hive have power I presume? It might be worth linking out at the boiler.

I removed BDR91 and installed HIVE do have power and gives GREEN LED as expected when controlled via thermostat. I have attached the wiring photo of boiler

 

[CountryFan]

There’s not an old thermostat that’s been left in is there?

 

[Madrab]

We're kinda going round in circles here - it should be a pretty easy issue to fault find. It's just following the L out from the Boiler, through the boiler switch in the UFH controller and the receiver.

If it follows any sense then I have a sneaky suspicion that the L out/L in cable from the boiler is heading to the wiring centre above the UFH controller, as there is only one set of switching wires. After checking the UH8 RF it actually has a zero volt switch so both the UFH controller and the room stat has to switch the boiler's L out to run the boiler so it has to go to both the stat and the controller and the SL (L in) has to come back from both so they have to join up somewhere. Again as there is only one set of switching wires then that connection should be in the wiring centre.

Just because the HIVE controller goes green just means it's powered @ the L&N and the switch is activating but if there's no 240V on 1 then there will be no SL (3) going back to the boiler.

 

[newbie910]

Its fixed now after another engineer visit. The wiring at boiler was wrong and it was his mistake from last vist and i will post the picture in the evening. Now, HIVE ( boiler heating) and Heatmiser ( UFH) controllers are working.
The problem is now i have 2 hubs for wifi control one for HIVE and another for HM. Can i use HM reciever or buy another one and only use HM app for both my UFH and Heating ?

 

[Madrab]

The problem is now i have 2 hubs for wifi control one for HIVE and another for HM. Can i use HM reciever or buy another one and only use HM app for both my UFH and Heating ?

Don't think so - I don't believe they are compatible - simply put they won't talk to each other.