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Thanks very much secureiam. All swapped out now, without powering down. As a precaution, I taped up the 12V wire while I was working to avoid it touching stuff it shouldn't.

Hi. I need to swap out a faulty PIR on my Texecom Premier 24. Is it necessary (or best practice) to power it all down before doing so please? I've seen various threads on here that imply you don't need to. Just trying to avoid the faff of holding the bell high and disconnecting multiple...

Thanks everyone for your help. To confirm, it is enough (as you've all said) just to connect the bell 12V and 0V directly to the battery. I actually left all the wires connected into the panel, but added a new break-out connector wired across the bell 12V/0V lines the other end of which I...

Thanks, that's really helpful. Can I double check I've understood. On the panel, the bell is configured as an SAB. That suggests that bell- is driven to 0v to sound the bell. I'd inferred from that that I'd also need to hold bell- at 12v to keep it quiet. What am I missing?

Hi. I'd be grateful for some help please. I need to turn off the power to my Texecom Premier 24 (V8.00) to do some upgrades, but I can't get the bell into hold-off mode so it goes off when I remove the power to the main panel. I think (but am not sure) that the bell is a Texecom Odyssey...

Having looked a bit more at this, I think the question can be simplified: The boiler has a live supply (LS) which is downstream of the main power switch on the boiler. At the moment LS supplies the hot water/central heating controllers which switches it through to the live return (LR) to fire...

Hi I'd be grateful for some help on rewiring my heating/hot water system to accommodate Hive please. It's not a straightforward install as the hot water and central heating controls aren't on the same backplate at the moment. This is the present setup: Boiler is a Worcester Bosch 40cdi with...