Replacing analogue thermostat with digital (1)

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Hi I have 3 zones in my house with analogue thermostats, I want to upgrade to the Honeywell home dt90 can anyone point me in the right direction for the wiring I’ve attached pic of the analogue wiring and the back of the new thermostat casing any help much appreciated
 

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This is the analogue thermostat wiring diagram
 

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Live and switched is easy enough (1 and 3 to A and B respectively), just unsure about the other one, either pump or motorised valve?
 
Your present thermostat is actually wired the wrong way round - assuming brown is Live.

It should be Live to 1 and Switched Live to 3 - which will be L to A and SL to B.
That's all you should need.

upload_2021-11-5_18-51-33.png


Where is the lamp shown in the diagram
 
No, 1 to A and 3 to B.

Not sure how this would work with the DT90, sorry :notworthy:


Tried this with and without grey in c not working do I need to bridge anything like the analogue one was ?
 
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Your present thermostat is actually wired the wrong way round - assuming brown is Live.

It should be Live to 1 and Switched Live to 3 - which will be L to A and SL to B.
That's all you should need.

View attachment 249700

Where is the lamp shown in the diagram

hi the old stat was working can’t get this thing to go at all ‍♂️
 

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