Hive replacing ELV stat

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29 Nov 2017
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Hi,
This is a post for anyone with good technical knowledge of wiring Central Heating Programmers / Stats, in particular the British Gas Hive v2.

I currently have a very basic 'Celect' battery operated programmer/stat controlling my Saunier Duval Combi.
I have 2 wires inside, COM & N/O with 72v between these contacts when heating is off.
I have purchased a new Hive system, with single channel receiver/hub/stat.
I need to know where my existing COM and N/O connect to within the new receiver, and if any loops are required?
And is my assumption correct that I need to provide a new mains supply for the receiver?

Many Thanks,
 
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Take Live & Neutral from the boiler, boiler COM to Hive COM, N/O to Heating On
 

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