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Im not familiar with Hive heating systems; although I am aware that somewhere along the line (probably at the start, and not the control box thing that plugs into socket!) it needs a mains supply . Anyone know if the Hive circuit is switched off, would this cause the boiler the revert to its manual settings (obviously the circuit supplying the boiler is not supplying the Hive).
Thanks
 
Ok so today I disconnected an immersion from an ancient FCU. Customer says he dont need immersion connecting up again, he never uses it cause the boiler provides the hot water. Fine I think, so i blank off the FCU. I check the immersion is on its own circuit like it should be, and it appears it is; the boiler is not connected to the immersion circuit, and nothing else by the looks of it, so i switch off the circuit at the fuse/cb.

Couple of hours later I get a call saying the hive system is no longer controlling the heating like it did, and the boiler settings have gone to manual (he can operate the heating manually).

So im thinking that the hive may be connected to the immersion circuit, and because I switched it off (off at the fuse), it has caused the boiler to revert to manual settings or resetted the hive system.
In that case it is wired incorrectly. The Hive MUST be powered from the same source as the boiler. The heating system must have only one point of isolation.
It sounds to me like someone has added the Hive and used the Immersion circuit as the power source, with the bopiler being on a different circuit/source. The power must come from the boiler's live and neutral.

Sounds like you have more work to do........
 
I believe the OP has worked for a customer, and had no idea Hive was involved. No-one would assume an immersion circuit to powering anything else if it wasn't marked on the DB.
The Hive install could have been done by BG... or by the customer themselves. Cant blame the OP for not knowing it was there.
 
In that case it is wired incorrectly. The Hive MUST be powered from the same source as the boiler. The heating system must have only one point of isolation.
It sounds to me like someone has added the Hive and used the Immersion circuit as the power source, with the bopiler being on a different circuit/source. The power must come from the boiler's live and neutral.

Sounds like you have more work to do........

Will be going back tomorrow to check, although i suspect the hive may not be on immersion circuit (although it could connected somewhere obscure).
While eliminating the immersion (no cb's are marked on old cu) I switched a few other circuits and may have switched the hive/boiler off (and back on again).

This is why i asked the original question, " If a hive system is switched off/on at the mains, does the system revert back to the boiler settings {and the hive need to be reset}" ?

I asked this as Im not familiar with hive systems, im not asking how to wire a plug ffs; in all honesty I think this thread has come across like a snail on speed.
 
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Hive heating question
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UK Electrical Forum
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haptism,
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buzzlightyear,
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