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Minimal at cooling is equals to maximum at heating. That means that vl will not bee cooler than min vl and not bee hotter than max vl. This will save the floor from damage. (craks cause of overheating and condansation cause of airhuminity). 15 degrees Celsius is best preset of min vl. Edit: If it gets to cold in the hause Set cooling curve flater. Its like with the heating curve. You have to try out Till you get the best settings. Gretings Peter |
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Hi Peter, Thanx, if I understand you well; you mean the maximum of the cooling curve equals the minimum of the heating curve. This makes sense. But if I set this minimum VL VL [Vorlauf] temperature in menu 1.9.3.1 at 24 degrees the maximum of the cooling curve stays 20. So are you sure about this? And the seconden question. I know when the heating stops. It's when GM becomes 0 But the cooling doesn't seem to work with GM. So how does the heatpump know when it must stop cooling? Gr, Michiel |
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The GM is only for regulating the frequezy of the compressor. At passiv cooling is no compressor aktiv. So there you dont need GM for cooling. The regulation of Temperatur is only by the Bypass valve of the heat exchanger. This valve is controled by the cooling curve. The minimum vl setting is only to save yor floor from condansation. The rest of the settings are for controlling the vl temperatur. At minimum vl at 24 degrees you will not have anny cooling. Passiv cooling is effizient when it runns verry long. If it is too cold in the hause you make the cooling curve flater. The vl will rise up slow. Gretings Peter |
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But in cooling mode if the average outdoor temp is for instance 20.2 degees, the max of 20 degrees is too cold in the long run. Making the curve flatter doesn't help (the room temp. will become too cold (20) in the end) I think i need a higher max setting or a way to stop the cooling mode... |
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Two remarks: First, the PCM42 is controlled different from the PC mode of the PC model. Therefore, experiences and settings from PC model may not help here. Second: You could try to activate room temperature impact with a factor of, e.g., 2. This way, if the room becomes too cold, the cool curve is increased by an appropriate value. If room is 0.5K too cold, cool curve is increased by 1K. |
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Hi, I still have troubles to understand the way cooling is supposed to go off. I have deactivated menu 1.9.4. and from the link below I can confirm that indeed also menu 1.9.5 doesn't do anything in auto mode. If I set the cooling to go off 0.5 degrees below the setpoint of 22 degrees. It doens't turn off if RMU/BT50 reaches 21.5 degrees. But if this doesn't work how else is it supposed to go off. There's also no way (at least I didn't find this setting) to set the cooling curve higher than 20 degrees... Besides the method of @janRi the only method I can think off is to activate curve 0 in menu 1.9.1.2 and set the VL VL [Vorlauf] to 22 degrees for low outdoor temperatures in menu 1.9.7.2. Is this the only way to do it? https://www.energiesparhaus.at/forum-einstellung-passive-kuehlung-nibe-knv/42267_4 |
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