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Jeff RE: Electricity price predictions  

By Jeff, 1 hour ago

  Are you an academic @lucia?
RE: Hitachi Yutaki SCombi Heat Pump - Owners  

By JamesPa, 2 hours ago

  OK, how do you know its reached the set temperature, and does it continue to heat the DHW at an elevated flow temp (and thus overshoots the DHW set temp)? If not what does it do (switch off entirely,...
RE: Replacing my 18 month old Hitachi Yutaki ASHP  

By JamesPa, 2 hours ago

  Its not so much challenging as seeking to understand. Your house cools very slowly so provided that the right amount of energy is put in over several hours (which, if the WC curve is correctly adjust...
RE: Hitachi Yutaki SCombi Heat Pump - Owners  

By Sim0n0, 2 hours ago

  @jamespa Hi James The controller shows it’s still in DHW mode despite reaching the set temperature. It’s not on a timed program, it turns on at 45 and off at 48 - 24/7. It’s always worked fine until t...
trebor12345 RE: Replacing my 18 month old Hitachi Yutaki ASHP  

By trebor12345, 2 hours ago

  You always challenge my thinking! I don't specifically know why I think it's too long. My only thought is do other systems/users have that long time. Yesterday it did take some time to get heat into...
Toodles RE: Confused by Flow Rates  

By Toodles, 3 hours ago

  @jamespa Ah, they do indeed do firmware updates very occasionally, they carried out one a few months back ISTR. Maybe that is the reason then! Regards, Toodles.
For owners of the Grant Aerona and Smart Controller combination : a question about thermostat behaviour  

By Unsure, 3 hours ago

  I’m trying to rule out a fault, could owners of above combination answer the following for me? Regardless of weather curves etc, can anyone confirm that if the Smart Controller is set (for example) to...
MikeFl RE: Grant Aerona circulation/system pump staying on  

By MikeFl, 3 hours ago

  @damonc The only time the circulation pump on my HP runs 24x7 is when it's in "frost protection" mode i.e. OAT goes below 3C, when it stays running until OAT goes above 8C. At other times, it only run...
RE: Help…my Nibe has faulted again.  

By JamesPa, 3 hours ago

  Have you actually had a Nibe engineer in or just an installer. You probably shouldnt be paying anything if Google is right, it should be a warranty issue, Nibe are a premium brand so its disappointin...
RE: Help…my Nibe has faulted again.  

By Fiona, 3 hours ago

  @jamespa thank you. At this stage (3rd winter with it cutting out when cold) I’m on the verge of seeing if it’s possible to replace the pump and putting a gas boiler back in. It’s costing so much mone...
RE: Help me keep the faith with my air source heat pump installation  

By JamesPa, 3 hours ago

  If the house is heating up I wouldn't worry about low deltaT. Lower is more efficient, at least up to the point where the power consumption of the water pump starts to become significant, which is li...
RE: Hitachi Yutaki SCombi Heat Pump - Owners  

By JamesPa, 4 hours ago

  Understood. Nevertheless this is, with high probability, a very simple and easily pinpointed fault that very likely doesn't require any hitachi specific (or even heat pump specific) knowledge to fix....
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