The rad in the airing cupboard has an HR92 on it, but I just want the airing cupboard to have the opportunity to heat up whenever something else decides to fire the boiler. I thought the latest firmware update might let me do it, but I can't see how. If I unbind the HR92 will it work like a regular mechanical TRV?
Using an unbound HR92 as a regular TRV
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Originally posted by IanIreland View PostIf it's unbound can you just leave it at the temp you want?
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Originally posted by DorrisMancer View PostThat's what I'm asking. I can't find anything to tell me whether the temperature comparison (set vs actual) and driving of the stepper motor is done inside the HR92 (and that it works even if unbound) or whether it needs the controller to command the stepper to move ... hoping that someone here does. If not I'll suck it and see.
No scheduling of course, set it to one temperature and it will stay at that temperature forever to the best of its ability, given that it can't call for heat from the boiler, so just like a mechanical TRV in that regard, just one that is a lot more accurate at maintaining that temperature.
I actually bought a single HR92 and used it for a few months before I bought an Evohome controller, so I know this works.
Be sure to delete the zone it was originally bound to in the controller (if it was the only HR92 in the zone) or rebind the other HR92's if there were other ones in the same zone to ensure that the controller itself also no longer believes that HR92 is bound - it's probably not enough to just clear the binding at the HR92 end.Last edited by DBMandrake; 28 March 2018, 06:51 AM.
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