With various new bits of technology in the house it's taking a while to get used to a few new noises, albeit quiet ones, that they have introduced. These include a range of hums, clicks and gurgles from the induction hob, fridge freezer, and the loft ventilator (but not in that order).
The most obvious ones, especially as we haven't managed to install any doors yet, are the hums from the underfloor heating (UFH) pumps along with the clicking on and off of the UFH control valves. As the set that is in the airing cupboard is only a few feet away from my head at night it can be particularly obvious, especially when it switches on at 3am, and this is what is puzzling me.
The UFH system is controlled by Polyplumb controllers which act much like a conventional boiler controller, except that they only control one UFH zone. So we've got one controlling the kitchen/diner, and two for the two upstairs zones. They come with a range of preset time settings to suit typical heating on/off times. As somebody who likes to optimise such things I've used the 'User' programme to create our own timeschedule for each zone. Needless to say none of the zones are set to provide heating at 3am, unless they drop below the 'setback' temperature of 11C. Hence being puzzled when I've been woken up by the sound of the UFH working when it shouldn't. What is more peculiar is that the controllers (it's not just one that does this) indicate the hand symbol when this happens, something that is supposed to indicate manual override. So who is it overriding the UFH at 3am and other times....or is it some sort of ghost or gremlin in the controllers? Our plumber can't see why it's happening, so looks like I'll have to do some more testing before talking to Polyplumb to see if they've come across this before.
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2 comments:
Since this is happening at 3 am, which is norminally the coldest part of the night. And since temperatures outside are definitely dropping below 11 deg C, I would have thought you had your answer. Maybe the "manual" symbol also includes times when the system cuts in for low temperatures?
Nope, that's not it. The 11C setback temp is the internal temperature that should trigger the UFH pumps to run, and it certainly hasn't been that cold inside.
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