Just installed the new Hive 2 smart thermostat and have a question on how to disconnect the old wired Siemens dial-type thermostat. I believe I have an S-plan heating system with a boiler in the garage and cylinder and pump etc in a cupboard upstairs.
Right now the heating only comes on when the old thermostat is higher than room temperature when the Hive calls for heating. There is a brown (L1) and grey (Y1) wired to the Siemens thermostat in the hall. With the thermostat 'off' there's 240v between L1 and Y1 and when it's 'on' this drops to zero.
This sounds like I should just be able to disconnect both terminals and isolate them seperately so there's never any voltage over these, and the Hive would control the heating as expected. Is this correct, or is there another way to do this? I'd prefer not to do this at the controller side as the wiring in the back box is very tight and obviously I can't see where the wires go if anything were to come loose.
I can supply pics if required.
Thanks for your help.
Right now the heating only comes on when the old thermostat is higher than room temperature when the Hive calls for heating. There is a brown (L1) and grey (Y1) wired to the Siemens thermostat in the hall. With the thermostat 'off' there's 240v between L1 and Y1 and when it's 'on' this drops to zero.
This sounds like I should just be able to disconnect both terminals and isolate them seperately so there's never any voltage over these, and the Hive would control the heating as expected. Is this correct, or is there another way to do this? I'd prefer not to do this at the controller side as the wiring in the back box is very tight and obviously I can't see where the wires go if anything were to come loose.
I can supply pics if required.
Thanks for your help.