Last seen: Apr 23, 2025
Thanks for your help.
I have no idea, to me there is no logic. There is no information on-line about this Hitachi system, so a bit of a loss.
The heat generated in the 5 minute period is with the pump on which goes to the manifold and floor. My de-ice cycle is exactly as yours.
In the 5 minute period the compressor is running, taking electrical power and producing heat. This, what Hitachi call a "Thermal Off" I might call a ...
The first dip is the thermal off period where the compressor stops for 3 minutes and the refrigerant in the pipe from the heat pump to the internal un...
The fan does turn off, water from inside is then pumped in reverse, power is take to heat the water and then the fan and compressor runs. Takes about...
@editor I just wanted to know other owners thoughts and experience of this system. I am having issues with short cycles and getting steady flow tempe...
Latest Posts
-
RE: Help me keep the faith with my air source heat pump installation
@adamk it's probably filtering different providers in t...
By Mars , 7 minutes ago
-
RE: Getting the best out of a heat pump - is Homely a possible answer?
@grahaml Thanks for sharing your experience of conne...
By Steam Powered , 2 hours ago
-
RE: why solar diverters for HW instead of the heat pump?
I should probably add to my comments above that, whilst...
By JamesPa , 14 hours ago
-
RE: Commencing on an ASHP Installation Process
Lots of reading and questioning which the background ma...
By JamesPa , 19 hours ago
-
RE: The Great British Heat Pump Quiz
Not sure how that happened 🤣 I suspect that it ...
By Mars , 21 hours ago
-
RE: Help with understanding my Mitsubishi Ecodan air source heat pump
@patch I think @ashp-bobba gave you some great pointers...
By SUNandAIR , 2 days ago
-
RE: Installing your own ASHP - DIY
Hi @tomasmcguinness, how are you progressing with this?...
By Ashfp , 2 days ago
-
RE: Say hello and introduce yourself
Welcome to the forum. If you are new to ASHPs I sug...
By JamesPa , 2 days ago
-
RE: The Rise and Fall of Europe’s Most Generous Green Subsidy
This is where the cold water storage tank was situated;...
By Dwynwen , 3 days ago
-
RE: Air Source Heat Pump - Side Alley Suitability
Thats probably fair enough. The degree-days calculatio...
By JamesPa , 3 days ago
-
RE: ASHP Ecodan L9 error - No Heating but Hot Water
That’s interesting, but obviously concerning also…. Do ...
By SUNandAIR , 4 days ago
-
RE: In the middle of an ASHP installation - a few questions (and issues)
Thank you @robs - that very useful data. The issue wa...
By Transparent , 4 days ago
-
RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's
@trebor12345 The Auto function is supposed to adapt au...
By Heatgeek , 5 days ago
-
RE: help sizing rads based on room by room heat loss
If its 1988W at DT 50, which is how most radiators are ...
By JamesPa , 5 days ago
-
RE: Career change – entering the world of heating and heat pumps
@editor Mars, thank you. That's along the routes I was ...
By Lakey , 5 days ago
-
@editor thanks Mars, it's a rare occasion I'm looking f...
By big_si , 6 days ago
-
RE: Efficiency Concerns on newly installed Mitsubishi Ecodan 8.5kW
@ashp-bobba and @jamespa - thank you both for all your ...
By CBrenewable , 6 days ago
-
-
Win one of five "Heat Pumps 101" Courses
Heat pumps are gaining traction in the UK, but between ...
By Mars , 6 days ago
