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trebor12345
trebor12345
@trebor12345
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Joined: Feb 26, 2024
Last seen: Jan 11, 2026
Topics: 8 / Replies: 105
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RE: Replacing my 18 month old ASHP

The house only requires 14watts/m2. So at -2C I only require 2.7kwh. The HP is a 7kw machine. (forgive me if have some of the annotations incorrect)...

2 months ago
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RE: Replacing my 18 month old ASHP

The Thermal Off is where the temperature into the heat exchanger is too high and it shuts down because the water is too warm. Others would call this ...

2 months ago
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RE: Compressor and Evaporator Stratification

Thank you. That's an excellent find. As you can probably see I know nothing about the mechanics of how HP work. Looking at the diagram how many diff...

6 months ago
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RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

Thank you this is very helpful. There is a lot to take in. I have the heating on today and have been doing videos of the Live View. The funny thin...

9 months ago
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RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

I have tried the DT mode and it does seem to be better with this setting. The Gundfros UPM3 is current in constant pressure setting 3 (max). When t...

9 months ago
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RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

UFH is mainly 200mm. Screed - 17mm Ambi Tak. Mainly engineered wood and carpet and tiles.Grundfos UPM3 (K) in constant pressure mode. Switched on b...

9 months ago
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RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

It has taken me a while to get my head around it, plus the warmer temperatures to prove it. I have tried to explain the situation to Hitachi, but they...

9 months ago
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RE: Hitachi Yutaki SCombi Heat Pump - Thermal Off's

Thank you all for your help, this has been a learning experience. So in summary. My heat pump is oversized, this causes Thermal Off’s or short cycle...

9 months ago
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