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Yes! That's it exactly.

There is a standard two core plus earth cable running from the timer/programmer to a double plug socket. The boiler and pump were/are plugged into this socket. The live (red) wire goes to the stat (now the receiver) and returns from the stat/receiver to the double socket where it is connected...

No - you misunderstand me. I will definitely take the advice about not using an earth wire for the neutral connection now that I have figured out which of the connection options was the correct one for my set-up. I just need to get hold of a length of more suitable cable and the job will be...

All I can tell you is that the old stat (and now the new receiver) was fed from the programmer/timer which was feeding live, neutral and earth to both the boiler and pump. The stat was wired in series into the red live feed. I have attached the live wire to the COM of the receiver and this...

An update! Your advice above turned out to be incorrect. I tried wiring it up the "volt free" way but this didnt work so I reverted to the 230v option and this did work. I used the spare earth wire to connect the N terminal on the receiver to a "common" N at the nearby socket. At first I...

Thanks very much. Thats very clear and helpful! Chris

fair comment but could someone please confirm the correct connections for me? Chris

Yes of course that's true! I've now figured out how to add an image to a post so the picture is now showing properly. I guess the main issue is how to make that neutral connection. I may need to get a length of 3 core plus earth? Chris

Hello there I'm seeking advice on the correct way to wire up a Salus RT300RF thermostat. My boiler is an old Glow-worm model which had a standard type room stat wired in series on the live feed from the timer control to the boiler. This involved just the two wires - live and neutral. The...