Honeywell T45 Wire diagram

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12 Oct 2020
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Hi Can someone Please help

I have a Honeywell T45 which needs replacing.

Have problems working out what Wire Diagram is being used as I can't see they match.

I know you have Y, S, C and W Plan but my wiring does not match ?

any suggestions Please
IMG_5116.jpg
 
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If you have decided which unit you are replacing it let us know, it should be straightforward to change over.
Some pictures of any motorised valves in the system will give more of an idea of the type of setup it is in.
 
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been a donkey should have looked more closely at the Valve :0) It say's Sundial Y Plan on it
IMG_5162.jpg
 
So last Question hopefully. below is the Y plan for the Honeywell T45 Programmer why does my have 3 wires into the permanent Neutral when the diagram has only 1 ?
IMG_5163.jpg
 
Because if you follow the N you will see that they are all connected in the wiring centre
 

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