Hi,

My old Honeywell room thermostat needs changing. I bought a Horstmann HRT2. The old wiring was twin and earth style with the earth cut off (not used) and just the live and neutral cables being wired in. The instructions for the new thermostat indicates that 3 wires are needed: L - Common supply, Load - Call for Heat, N - Neutral. Can I use the existing wiring and just omit one of the connections ? If so, which one ?

Cheers....