What flow temperatures are you currently running?

  • Erstellt am 2021-10-24 10:27:23

konibar

2021-11-21 16:13:56
  • #1


yes, also.

The consequence of improper adjustment can be that the hysteresis becomes too small.
This can happen if you want to keep the supply temperature as exact as possible.
But this is not necessary! It may well fluctuate a few degrees between the switch-on and switch-off point.

Maybe a few more liters of water can also fit into the heating circuit?!?
(well vented?)

Therefore, I would try to figure out which setting causes the small
hysteresis and increase it accordingly.
 

lesmue79

2021-11-22 06:26:54
  • #2
This morning it was 3°C AT and the flow temperature was 26.5°C with a 3.5k spread. The room temperature was around 20-21°C everywhere. The energy integral was something around -115 degree minutes.

According to the controller, the compressor modulation was 33%. I have now noted the compressor starts and hours, curious to see where they will be this evening or tomorrow morning at the same time when 24 hours have passed.
 

Alessandro

2021-11-22 08:41:56
  • #3
Depending on the manufacturer's specifications, you can calculate how many starts your heat pump should/may have to achieve a lifespan of 20-30 years. 15 starts per day are absolutely unproblematic if the hydraulics are correct, the heat pump receives good flow, and it is lubricated.

You always have to keep in mind that the majority of heat pump owners do not give a thought to optimization or settings. And I claim that of the installed heat pumps, certainly >50% are oversized. During the transitional period, almost every heat pump is oversized anyway...

If compressors had to be replaced every 5-10 years, people would start an outrage.

There are also practically no forum posts where people complain that the compressor has died after 2-10 years.

Of course, optimization makes sense alone with regard to the wallet, and some systems are really very, very poorly adjusted. But most of the problem lies in the screed... Here and especially in the other forum, optimization is always taken to the extreme. :rolleyes:
 

Dennis89

2021-11-22 09:08:52
  • #4


33% equals how many watts? My compressor is currently running at 32Hz with 788 watts at AT 2.7.
 

lesmue79

2021-11-22 09:29:27
  • #5
Flow rate or not, according to the data sheet, the nominal flow rate of my heat pump is 540 l/h at 5K 540 x 1.16 x 5 = 3132 watts The heating load of the place is 3176 watts at 20° everywhere without considering controlled residential ventilation or heat recovery Turning all circuits up, the system delivers 700 l/h, but I have to throttle it back because I have some circuits that are relatively short, and in the end, I also end up somewhere around 600 liters. The underfloor heating is somewhat botched in terms of hydraulics concerning individual rooms.
 

lesmue79

2021-11-22 10:45:16
  • #6


The electrical power consumption at that time was, I believe, 400 watts.

I think I can also display the Hz number somewhere...
 

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