CH stat: Honeywell T40 for Drayton Digistat

[Keyser Sose]

I want to install a new digital room stat. However, a bit concerned about the wiring. My existing Honeywell T40 has a live, neutral and a "call for heat" (I think). The Drayton Digistat is battery operated. Therefore, why do I need the neutral on my new Digistat? Surely, all the room stat is there fore is to say fire/no fire to the boiler? So, a connection between two wires (live and call) is all that is required?

Not sure :-() Any ideas?

Thanks, Steve

[Tony Bryer]

You don't: just terminate the free end safely in a single piece of choc block (connector strip)

[Keyser Sose]

Thanks for the reply. So I just need two wires to be connected then? The live and the call? Simple as that? Regards, Steve

[Roger Mills]

Correct. The neutral on the old stat was the return for the accelerator heater - which helped to reduce hysteresis. The digital stat doesn't need any of that.