Sole-water heat pump with ground probe experiences?

2023-02-04 09:33:18

Regarding the topic, do you all also have an ugly overpressure discharge vessel in case you ever need something like that? Or how was that implemented for you? Heizi says it shouldn't be discharged into the wastewater.

We don't have something like that, but we have some kind of hose that runs once around the technical room into the drain basin ;)
I have to check tomorrow if I can trace whether it comes from the heat pump

2023-02-04 09:50:34

On the topic, do you all also have an ugly overpressure catch container, in case you ever need something like that?

Yes, but it's hidden behind the heat pump. There was something in it at the very beginning, but it's been dry ever since.

2023-02-06 09:14:18

Thanks again so much! I have now directly contacted our heating engineer (subcontractor of the construction company): he can also install a brine-to-water heat pump after all. It would be a device from Viessmann. Are Viessmann devices good as brine-to-water heat pumps? For air-to-water heat pumps, he also recommended one from Viessmann; there are also a lot of experiences with problems with it, so we then potentially decided on Ochsner (reluctantly from the heating engineer’s side). Basically: are the differences with brine-to-water heat pumps (repair needs, error messages, etc.) not as significant as with air-to-water heat pumps with an outdoor unit? And is it better to plan something other than Viessmann in that position right away?

2023-02-06 09:18:53

The manufacturer is not so important, rather the range of features and COP. It should be modulating, which is not yet standard for brine-water heat pumps. Otherwise, cooling if desired, interfaces if needed, e.g. [SmartGrid] for photovoltaic, etc.

2023-02-06 11:30:05

As Fuchur says: the main thing is modulating and *correctly dimensioned*. Very important, because even a modulating heat pump has lower limits – if it is oversized, it still won't always operate in the optimal range.

Cooling function should be considered right away: with some manufacturers it cannot be retrofitted – I don't know if it's the same with Viessmann.

Also to consider whether the controlled residential ventilation unit is also from Viessmann, so that control can be done via heat pump / heat pump interface.

2023-02-06 16:09:45

Thank you all very much again! I have now contacted our heating engineer directly (subcontractor of the construction company): he can also install a brine-to-water heat pump after all. It would be a device from Viessmann. Are Viessmann's good as brine-to-water heat pumps? For air-to-water heat pumps, he also recommended one from Viessmann, but there are also lots of experiences of problems with that, so we potentially decided on Ochsner (unwillingly from the heating engineer's side). Basically: aren’t the differences with brine-to-water heat pumps (repair requirements, error messages, etc.) not as significant as with air-to-water heat pumps with an outdoor unit? And at that point, would it be better to plan something other than Viessmann right away?

We still have the "old" Vitocal-333G, so still on/off and no modulation (the new variant can do that though). But it does what it's supposed to do without grumbling and quietly. In operation since 2018 with an annual performance factor of 5.3 at about 1700 kWh/year consumption (130m2 Energy Saving Ordinance 2016, year of construction 2018). Also with the matching ventilation Vitovent-300F.

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Sole-water heat pump with ground probe experiences?

WilderSueden

Fuchur

NilsHolgersson

Fuchur

Harakiri

Heinz2k