...
Genius Starter Kit (Single Channel Receiver)
Included in the Genius Starter Kit is the Single Channel Receiver, which is most commonly fitted to a Combination boiler (for properties without a hot water tank). In many cases you can swap in the Single Channel Receiver where the wired house thermostat or boiler programmer was located as the Single Channel Receiver uses a standard backplate. You need to ensure that wiring is correct for the Single Channel Receiver before placing it on the backplate.
...