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pihome-shc / pihome

PiHome - Smart Heating, Ventilation and Air Conditioning (HVAC)
http://www.pihome.eu
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ZONE overrun #429

Closed sandreialexandru closed 3 years ago

sandreialexandru commented 3 years ago

Having a zone valve open for some time, after the boiler stops would be a good idea. This helps with the dissipation of heat and the prevention of pressure building up. CASE 1: If boiler is triggered by zone valve, then boiler overrun is the way to prevent pressure build-up, if the recirculation pump can be managed separately. CASE 2: If boiler is triggered by GPIO, then as soon as boiler stops the zone valve closes(triggered by GPIO or Zone Controller), but residual heat will not be dissipated and pressure would build.

pihome-shc commented 3 years ago

we already have implemented this: boiler stops first and takes reading from boiler table for overrun time and leave zone valve open but if anyone have boiler controlled by zone valve we have no way of offering control over that other then user have separate controller for boiler. or alternately user can disable this and have overrun loop (as i belive all systems have this)

sandreialexandru commented 3 years ago

Are you saying that if boiler is controlled by GPIO and zones are controlled by Wireless Zone Controllers, the valves remain open after the boiler stops?

pihome-shc commented 3 years ago

yes, that is the idea and i have my system controlled by gpio and it works

sandreialexandru commented 3 years ago

Great! I think I missunderstood the code. Sorry for that.

pihome-shc commented 3 years ago

no worries, if no further actions required can you close this issue