Thermostat wiring. Please help

[Adnic69]

Thank you for looking at my post.
I have just put a new boiler in my house (Glow worm 30cxi) and have a Salus RT300rf wireless thermostat. Now, going to the boiler I have a simple L N E coming from a fused spur. The same fused spur puts power to the transmitter. Now to connect the transmitter to the boiler I do what?
The boiler has 3 possible connections as does the transmitter. At the boiler end they are 0v Ebus and 24v, at the transmitter end they are on com and off.

If you could help I would be very grateful.

 

[gas4you]

Assuming this is the same as a Vaillant combi, and it sounds like it is, the switched live from the reciever would need to go to terminal 4 on the pcb.