Drayton to Hive

24 Jan 2007
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United Kingdom
I am also asking in another thread about an Alpha boiler and Hive, this is for my Dad, however I am also wanting to install Hive on my boiler.
I have a Worcester Greenstar 28i boiler with a wireless Drayton Digistat +2 RF
I am wanting to convert this to Hive heating.
My boiler manual has this diagram:


How do I wire the Hive? obviously the Live/Neutral/Earth are self explanatory but what about Term 3 (Heating on) and 1 (common)
Can I use the Drayton SCR wiring to link to the Hive or will I have to totally remove it and start afresh from the boiler?
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Ls = Live supply this goes to the Hive Common terminal 1
Lr = Live return goes to the Hive Heating on terminal 3

Ls and Lr may well be presently connected to the SCR so, if they are, then you can use the existing wiring.
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If you only have three cores (excluding earth) presently in the cable to the SCR, as the Ls is a permanent live, as well as being used for the Common terminal 1, it can also be linked to the L terminal to provide the live supply to the Hive

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