HCC100 with evohome questions
Posted: Sat Nov 16, 2024 10:17 pm
Hi,
Repeat evohome residential customer here - third house move so third install! - though this time including a HCC100 for UFH which is new to me.
Setup: standard S-plan plus style (intended) system with all rads now fitted with HR92's so heating 2-port valve manually kept open, boiler demand to system boiler via a BDR92 as "appliance control", stored hot water tank recharging via a 2-port valve with a BDR92 as "hot water only valve". All familiar territory so far.
UFH has a 2-port valve and additional pump. Should a) pump wired to HCC110 pump terminals and 2-port valve to heating demand terminals, or b) 2-port valve wired to pump terminals and in pump wired to 2-port valve orange/grey switched? Either way, presumably UFH zone boiler demand is automatically taken care of by evohome?
Looking at the HCC100's "advanced parameter list" and I'm sure a number of them become n/a when used with evohome, however to confirm:
"4 ECO limit (changeover value comfort-ECO mode) Setpoint of zone 1 which triggers all zones to change" - no idea what this is talking about?
7,9,10,11 - all relating to demand cycling - are any of these used or again all taken care of by similar evohome settings, I'm wondering especially about 9?
Finally, a question on the HCC100 fuzzy logic learning...
I'm starting to get my head around the "slow heat" way of thinking, not least as this is an in-slab setup so takes a long time to heat up (but then should retain heat longer etc). 10 loops making up 4 UFH zones, though in reality this is two smaller zones and two larger zones and with the two larger zones being open plan (potential sliding divider might come into play in future), so makes sense to set these 4 zones to the same temperature and schedule (vs them fighting against each other). Hydraulic side of installation got off to an imperfect start - plumber convinced all working and will just take a few days to heat up, I was less convinced but there was some temperature movement and all zone temps did start to rise and eventually to set point. In actual fact there were issues with some (most) loops, meaning set points across all zones met by accident, then overshot, and now with most/all loops working even more-so! In my mind this means the HCC100's profiling of the zones must be (understandably) way out, and that it will take many many days/weeks to readjust due to the lag between its heat command and resulting room temp. Should I worry about this and do a reset of some sort, or should I just leave it be to figure out life for itself?
Many thanks in advance, Simon
Repeat evohome residential customer here - third house move so third install! - though this time including a HCC100 for UFH which is new to me.
Setup: standard S-plan plus style (intended) system with all rads now fitted with HR92's so heating 2-port valve manually kept open, boiler demand to system boiler via a BDR92 as "appliance control", stored hot water tank recharging via a 2-port valve with a BDR92 as "hot water only valve". All familiar territory so far.
UFH has a 2-port valve and additional pump. Should a) pump wired to HCC110 pump terminals and 2-port valve to heating demand terminals, or b) 2-port valve wired to pump terminals and in pump wired to 2-port valve orange/grey switched? Either way, presumably UFH zone boiler demand is automatically taken care of by evohome?
Looking at the HCC100's "advanced parameter list" and I'm sure a number of them become n/a when used with evohome, however to confirm:
"4 ECO limit (changeover value comfort-ECO mode) Setpoint of zone 1 which triggers all zones to change" - no idea what this is talking about?
7,9,10,11 - all relating to demand cycling - are any of these used or again all taken care of by similar evohome settings, I'm wondering especially about 9?
Finally, a question on the HCC100 fuzzy logic learning...
I'm starting to get my head around the "slow heat" way of thinking, not least as this is an in-slab setup so takes a long time to heat up (but then should retain heat longer etc). 10 loops making up 4 UFH zones, though in reality this is two smaller zones and two larger zones and with the two larger zones being open plan (potential sliding divider might come into play in future), so makes sense to set these 4 zones to the same temperature and schedule (vs them fighting against each other). Hydraulic side of installation got off to an imperfect start - plumber convinced all working and will just take a few days to heat up, I was less convinced but there was some temperature movement and all zone temps did start to rise and eventually to set point. In actual fact there were issues with some (most) loops, meaning set points across all zones met by accident, then overshot, and now with most/all loops working even more-so! In my mind this means the HCC100's profiling of the zones must be (understandably) way out, and that it will take many many days/weeks to readjust due to the lag between its heat command and resulting room temp. Should I worry about this and do a reset of some sort, or should I just leave it be to figure out life for itself?
Many thanks in advance, Simon