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Last seen: Mar 20, 2026
@cathoderay For what is worth, it was recently pointed out to me, in a Greek heat pump forum, that certain high-end manufacturers, like Hitachi or Dai...
I think I am short of radiators, as I have not done any changes after switching to heat pump from oil burner. Or I am doing something else wrong. &n...
Yes, it does not cycle and I use a buffer, as shown in Midea's diagrams for 2 zones. To use LWT below 35, you could "fool" the system by defining UF...
I do actually, but I don't yet run it in an "unconventional" way. This is a latest plot of operation: I have switched to UFH mode to see what happ...
Hi all. I have made some progress regarding cause of cycling. First thing I noticed, is that cycling is exaggerated when set LWT is less than 40 C....
@benson thanks a lot.
@benson My system is a "simple" one: no DHW, no defrosts, no decontamination. So it is rather easy to decipher control logic. Would it be possible to ...
Please excuse my persistence, but I am struggling to understand what triggers the pump on-off. I presume it is some internal check or external signal....
@mosibi I confirm this and the value in my machine (R290) is 35. But this is for radiators, If you tell it you use UFH, it will get lower. In fact it ...
@cathoderay How come water at 35 ish C flows through an IAT of 21 C and does not lose heat ? Is there a buffer or a secondary network with its own p...
@cathoderay If I can see correctly, there are periods on the graph where LWT equals RWT and during those periods the unit shuts. If this is the case, ...
I wonder why it is cycling ? I thought this should be avoided. Is some thermostat intervening ? Is the unit oversized ?
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