ᐅ Heat pump is not compatible with a hydronic (water-heated) fireplace.
Created on: 20 Oct 2023 18:54
J
Jessica388
Hello everyone,
I hope someone here can help us because our heating engineer doesn’t seem to be able to…
Key data
New build 2022 with 250 m² (2,691 ft²)
Heat pump Viessmann Vitocal 200-A
Multifunction storage tank MFS1000S
Water-heated stove with heating capacity on the water side of 8 kW
Photovoltaic system
Electric heating element
I am attaching the schematic of the storage tank layout.
The stove was initially connected under “old” and now it has been modified.
Everything works fine as long as the underfloor heating is off.
When the underfloor heating is on, our hot water temperature doesn’t exceed about 55°C (131°F).
When the underfloor heating is off, the temperature ranges between 65–75°C (149–167°F), either via the electric heating element during sunshine or by stoking the stove.
Now, however, this energy seems to be wasted. It can’t be that the underfloor heating requires 70°C (158°F) supply temperature to achieve a flow temperature of 35°C (95°F), right? The return water is only slightly cooler. So the water should only need to be heated by a maximum of 5°C (9°F).
We assume either a) something is still connected incorrectly, or b) the cold water from the underfloor heating causes such circulation that the hot water cools down within minutes.
What can be done about this?
Has anyone experienced similar problems?
Normally, we should almost run without electric power, but currently the heat pump switches on almost every hour to heat hot water…
I hope someone here can help us because our heating engineer doesn’t seem to be able to…
Key data
New build 2022 with 250 m² (2,691 ft²)
Heat pump Viessmann Vitocal 200-A
Multifunction storage tank MFS1000S
Water-heated stove with heating capacity on the water side of 8 kW
Photovoltaic system
Electric heating element
I am attaching the schematic of the storage tank layout.
The stove was initially connected under “old” and now it has been modified.
Everything works fine as long as the underfloor heating is off.
When the underfloor heating is on, our hot water temperature doesn’t exceed about 55°C (131°F).
When the underfloor heating is off, the temperature ranges between 65–75°C (149–167°F), either via the electric heating element during sunshine or by stoking the stove.
Now, however, this energy seems to be wasted. It can’t be that the underfloor heating requires 70°C (158°F) supply temperature to achieve a flow temperature of 35°C (95°F), right? The return water is only slightly cooler. So the water should only need to be heated by a maximum of 5°C (9°F).
We assume either a) something is still connected incorrectly, or b) the cold water from the underfloor heating causes such circulation that the hot water cools down within minutes.
What can be done about this?
Has anyone experienced similar problems?
Normally, we should almost run without electric power, but currently the heat pump switches on almost every hour to heat hot water…
A
Allthewayup12 Feb 2024 19:10I would seriously have a word with the heating engineer who messed this up so badly. Imagine a doctor amputating a leg instead of stitching a scalp wound—that’s about how far off the mark this so-called heating engineer was.
But well, I’m currently experiencing similar issues. Tilers are sealing expansion joints with rigid grout, heating engineers are placing buffer tanks half on tiled and half on untiled floors, and electricians are piercing membrane boxes with empty conduit pipes – nowadays, according to the expert assessor, all completely normal.
But well, I’m currently experiencing similar issues. Tilers are sealing expansion joints with rigid grout, heating engineers are placing buffer tanks half on tiled and half on untiled floors, and electricians are piercing membrane boxes with empty conduit pipes – nowadays, according to the expert assessor, all completely normal.
J
Jessica38812 Feb 2024 19:20Allthewayup schrieb:
I would seriously confront the heating technician who messed this up so badly.
Imagine a doctor amputating a leg instead of stitching a head wound—that’s about how far off the mark this so-called heating professional was.
But well, I’m experiencing something similar right now. Tilers who fill expansion joints with rigid grout, heating installers placing buffer tanks partly on tiled and partly on untiled floors, and electricians damaging junction boxes by pushing empty conduits through the membrane—according to the building inspector, all very normal these days. I wish you a lot of strength and patience!
A
Allthewayup12 Feb 2024 20:10Jessica388 schrieb:
I wish you lots of patience and strength!Thanks, you learn to take things as they come 😉 😎*Edit:
A very good expert nowadays also acts as a psychiatrist for stressed home builders 😉
H
HungrigerHugo12 Feb 2024 20:35HeimatBauer schrieb:
To be honest, I often have to bite my tongue when I see people willingly acquiring things that simply don’t fit their situation. Sure, I grew up in a 1950s house where we had a potato bin in the root cellar, and the potatoes would last for months. But you couldn’t store anything else there, especially nothing that could rust.
And once again, I have to say: energy is still far too cheap. If we keep taking absurd measures (or can afford to) like the slavish combination of heating and ventilation, then I have to say: for some people, the cost per kWh should probably be at least 30 euros (for all forms of energy!) before they seriously consider whether what they’re doing makes sense. Frankly, how anyone “uses up” energy is none of your business. The day energy becomes unaffordable for the general population, politicians will face a huge surprise. That day is not far off.
C
chand198612 Feb 2024 20:43Energy is not a private commodity, and the consequences of its use are more public than anything else.
Therefore, the public clearly has an interest in regulations – which ones these should be is open for discussion.
However, the idea that it is "none of anyone’s business" is clearly incorrect here.
Therefore, the public clearly has an interest in regulations – which ones these should be is open for discussion.
However, the idea that it is "none of anyone’s business" is clearly incorrect here.
H
HungrigerHugo12 Feb 2024 22:17chand1986 schrieb:
Energy is not a private commodity, and the consequences of its use are more public than anything else.
Therefore, the public certainly has an interest in regulations – which ones those should be is up for discussion.
The idea that it "doesn't concern anyone" is clearly wrong here. Of course, energy is a private commodity. You still do not receive it allocated by the government.