I want to replace this old Honeywell stat with a digital stat (Honeywell DT90).
Old stat has 4 wires (I’m assuming these are Live-Red, Switched Live-Red, Neutral-Black and Earth-Yellow/Green). Earth is isolated and others are connected, I think, to Terminal 1=Live, T4=empty, T3=Switched Live and T4=Neutral.
Can anyone tell me how to connect to the DT90, please?
Old stat has 4 wires (I’m assuming these are Live-Red, Switched Live-Red, Neutral-Black and Earth-Yellow/Green). Earth is isolated and others are connected, I think, to Terminal 1=Live, T4=empty, T3=Switched Live and T4=Neutral.
Can anyone tell me how to connect to the DT90, please?