HI
I want to replace my mechanical Drayton RTS1 stat to a digital Heatmiser DT-TS.
I have four existing wires (one being an earth,not being used), three wires are connected to the Drayton RTS1 : RED - L, BLUE - N and YELLOW - 3.
On the Heatmiser DT-TS unit the connections are: NC - NO...