New install

[shed2000]

HI there

Is there an idiots install guide. I already have an existing heating installation with time clock for heating and hot water with the room stat (normal install)

Can I just use the existing wiring or do I need to remove this and run new wiring for this.

Also I have ordered the cylinder thermostat, does this come with another bdr91 or do I need to buy another.

[shed2000]

Don't worry just being stupid and have done it. Should look at manual properly