I've decided to replace my Drayton Digistat 3 programmable room thermostat with a wireless Horstmann HRFS1 Programmable Room Thermostat.
Currently the only wires connected to the Drayton are Live and Switched Live at 240V as below.
There are 2 options for wiring the Horstmann as below.
Which one should I use please?
Currently the only wires connected to the Drayton are Live and Switched Live at 240V as below.
There are 2 options for wiring the Horstmann as below.
Which one should I use please?