Why does my Worcester Greenplus HE 35 Combi boiler keep firing up? - Problem with TRV's?
Hi all, just wondered if anyone had any ideas on how to solve this. Apologies this is quite lengthy and I am not a pro (obviously)!
I have a Worcester Greenplus HE 35 Combi boiler. I connected the wireless control to it using the instructions. Then I set up the bridge, paired the thermostat and 4 Tado smart thermostatic valves. The smart valves are all in upstairs bedrooms. The thermostat is downstairs. There are 4 radiators downstairs which have non smart thermostatic valves.
After I installed the wireless control I could not get it to fire up the boiler. Apparently it was connected to the bridge, thermostat and smart valves but just would not respond. I ensured to set the boiler time and date correctly as well as set the heating dial on the actual boiler to constant on and E setting as suggested by Worcester boiler manual.
After spending ages disconnecting and reconnecting I did some searching online and found that someone had tried wiring the controller in an alternative way. Essentially, I excluded the black wire, then connected the other wires to a connector inside the boiler to connections 1,2 and 4 (rather than Ns (blue),Ls and Lr as advised). I then put a wire to bridge Ls and Lr. This actually worked in that the boiler now seems to recognise and respond to the Tado smart valves.
The problem is, that when the Wireless thermostat downstairs tells the boiler to fire up, it does so, but then will just stay on. The downstairs radiators (which dont have smart valves) get really hot, then the boiler continues to supply them with heat even once the room temperature is higher than the desired temp set on the wireless thermostat. Also, when a Tado smart valve upstairs comes on, this causes the downstairs radiators to all become hot, despite the downstairs Wireless thermostat being off. I did have the non smart valves set to level 5, but now have put them onto frost mode. This has stopped the boiler from firing up, but I am not sure what will happen when the wireless thermostat actually wants them to turn on later.
Has anyone got any ideas what I am doing wrong? Grateful for any suggestions.