Last seen: Feb 9, 2025
@jamespa there is indeed a large noisy water pump placed after the buffer tank that circulates the water through the ufh and the fan coils. However fl...
@jamespa i will try to have a reading as near to the hp as possible. So its possible that hot water enters the tank and is mixed with colder water tha...
Another thing i noticed is the flow temp at the manifolds. While the heatpump shows a reading of lets say 35 out and 32 in, the temp reading at the ma...
@Jamespa There is a "minimum off" and "minimum on" setting. What do you think i should set the values at?
There is a "nightshift" mode with which you can set the hp to operate at reduced fixed capacity (lowest setting is 40%) for a period. If i set it to w...
@jamespa i'm using an app named hi-kumo, which has no monitoring tools, only basic settings. There is an updated controller, released recently by Hita...
@jamespa i was able to watch a 20 minute operation. In a 12c outside temp, the heat pump cycled off 2 times for 3 minutes at a time. When it cycled on...
@jamespa only able to measure delta t on primary circuit. If anyone with knowledge on hitachi heatpumps can suggest a way to see number of cycles, it ...
@judith i can't hear the heatpump but i can hear the external waterpump. Maybe i can try increasing the flow temp, reducing the flow rate manually thr...
House is a construction of 2020 with xps insulation and double glazed windows. No clue on sizing. It was decided by the engineers during construction ...
Hey JamesPa thanks for the reply. The reason for my post is my observation of the low dt and my concerns on the stress that the system undergoes. I ha...
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