Last seen: Jan 12, 2026
The trouble is that I do not know enough about how heatpumps work at the moment, to offer any reply to this.
Thats a lot of data!
Thank you for the info. If I am reading it right, it only quotes the output power. From the data can you work out the min input power?
Hitachi Yutaki SCombi Heat Pump(Indoor Unit ) RWD-3.0RW1E-220S-K(Outdoor Unit) RAS-3WHVRP1 2024 build bungalow200m2High level of insulationUnderfloo...
@robs On the 5. 10kW Viessmann Vitocal in Sheffield. What is causing the heat pump to turn off and on every hour (approx). It it a room thermostat o...
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...
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