I have just bought hive thermostat single receiver for combi boiler when I took the old one off there is only 3 wires brown black and grey(which is not connected to anything ) how can I wire the new thermostat any advices please
In your situation the receiver is usually fitted at the other end of the stats cable. More or likely this will be at the boiler.
It will be quite easy. If you fit the receiver at the boiler then the hive will need a LNE supply. Then you just need to use the other 2 wires that will be 1 and 3. Those 2 wires will be the ones that come from the stat and join to the terminal strips and lead to the boiler.
The hive stat is wireless. But the receiver needs wired. It’s fairly simple to fit next to the boiler and will also be possible to fit the receiver at the old stats location with wiring modifications.
No. Your battery powered hive stat communicates to the wired receiver. The receiver is then connected to the boiler.
So replace the boiler switch with the wired receiver and leave the old stat as it is and my wired receiver will work with the wireless stat
The boiler switch needs to stay in place. What I would do is fit the receiver next to the boiler and run a bit 5 core between the boiler and receiver. I would then remove the existing black and grey wires on the current 5 core from behind the switch and inside the boiler. There’s other ways to do this though. You should maybe get someone in to do the job. Whilst it’s simple I suppose things could go wrong.
I think you are right will call someone to install don’t wanna ruin things but I really appreciate your help thanks anyway Mike stay safe