My boiler wiring has not gone to plan! Electrical Advice

My boiler wiring has not gone to plan! Discussion ThreadMy boiler wiring has not gone to plan! Electrical Advice

Evening all..

I've got myself into a bit of a pickle with trying to install a hive thermostat.

The house has a combi boiler.
There are 2 zones.. upstairs and downstairs.

In the wiring centre in the boiler there is one 5 core cable going into it.
L, N, E and the other 2 cores go to the terminal block labelled 'Room stat/timer' (see picture).

In that little 2 way terminal block (Room stat/timer), i assumed one would be a permanant live and one would be the switch live.

I have removed the existing grey and black conductors from this block (leaving the L, N and E in placer) and wired in my new 5 core (going to the hive receiver).

All appeared to work fine.

I switch the hive thermostat on, the boiler fires up.
I switch the thermostat off, the boiler stops firing.

However, the radiators are not getting hot.

Does this seem like I have done something silly to some kind of valve (I'm sure I didn't accidentally switch anything off), or is it more likely something to do with removing the existing grey and black conductors from the Room stat/timer terminal?

edit.. I bet removing the grey or black has stopped power getting to the valves? I just didn't see any valves, or any other cables by the combi though. There is just a FCU !



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