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Need some help please trying to replace my Honeywell with the new Nest on my Baxi combi boiler. The wiring on the Honeywell is N - 240v neutral L - 240v positive A - 240v B - 25v C - not connected The wiring on the Nest I know is N - 240v negative L - 240v positive 1, 2, 3, I have no idea...

Hi has anyone converted one of these sirens to run on a DC supply? I am removing my A1 siren box which was hard wired and replacing it with Yale. Unfortunately the Yale siren only has battery power which over time (2-3 years) will require ladders and battery's. happy to run 6 volts over the...