ᐅ Heat pumps consume a significant amount of energy and can generate considerable noise.
Created on: 17 Jan 2024 18:26
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Eldirwars
Hello everyone,
We have been living in our new house for one month now and are experiencing significant noise issues. The noise comes from the manifold of the underfloor heating system as well as the pump itself, which is very loud. The sounds are mostly sharp clicking or ticking noises, especially noticeable in the bedroom. The flow rate and the pump settings have been adjusted, but nothing has improved. However, it is always quiet in the early morning hours. Could it possibly be due to a setting on the unit? The heating technician has already been here but is unsure of the cause. Another technician from Bosch is scheduled to come and take a look, but I’m not sure if the pump is the problem. Also, the house is barely warming up at the current temperatures, and I am using more than 30 kWh daily, which seems very high for a 150 m² (1,615 sq ft) home.
We have been living in our new house for one month now and are experiencing significant noise issues. The noise comes from the manifold of the underfloor heating system as well as the pump itself, which is very loud. The sounds are mostly sharp clicking or ticking noises, especially noticeable in the bedroom. The flow rate and the pump settings have been adjusted, but nothing has improved. However, it is always quiet in the early morning hours. Could it possibly be due to a setting on the unit? The heating technician has already been here but is unsure of the cause. Another technician from Bosch is scheduled to come and take a look, but I’m not sure if the pump is the problem. Also, the house is barely warming up at the current temperatures, and I am using more than 30 kWh daily, which seems very high for a 150 m² (1,615 sq ft) home.
KingJulien18 Jan 2024 13:37I don’t know the first one, you’ll have to look it up. For example, the user manual and menu.
For the second: wherever it says Xtratherm.
Edit: The other way around.
For the second: wherever it says Xtratherm.
Edit: The other way around.
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Buschreiter18 Jan 2024 14:56Eldirwars schrieb:
I’m not referring to 22°C (72°F), but to the 30°C (86°F) set on the thermostat in the different rooms. My thought was that the compressor constantly tries to reach 30°C (86°F), which isn’t possible with this heating curve. Or is the "optimized temperature" that you can set on the device the target or maximum temperature up to which the unit heats? If that’s the case, where is the temperature measured? At the device itself? So, in the technical room, which is usually cooler anyway?
The heat pump is a Bosch Compress 6800i AW. It’s just a KfW 55 standard house with 36-brick masonry without additional insulation. So, not a greenhouse.
The auxiliary heater is permanently off. Heating curve at -28°C (-18°F) base point and 35°C (95°F) end point. Max flow temperature 45°C (113°F).
The noise definitely comes from the heating circuit valve and sounds like a radiator in my parents’ house when water flows through it. Apart from the whistling: With Bosch/Junkers controls, the desired or optimized temperature is just the parallel shift. The value could also be called "istdasdoof." This topic pops up in many forums quite often. Silly naming… nothing you can do about it.
I have two heating circuits, and no matter how the heating circuit pump is adjusted, I cannot hear any flow noises, regardless of how I set the thermostatic valves (all fully open, only one per heating circuit, etc.). There are also bypass valves installed in my heating circuits (I believe these are called "bypass valves" or "overflow valves") (at the far left where you have the two "empty" connections).
My heating technician said that this "bypass valve" probably prevents flow noise.
My heating technician said that this "bypass valve" probably prevents flow noise.
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Eldirwars18 Jan 2024 15:46If the optimized temperature for the devices only changes the offset, how do I tell the device to stop heating? There must be some value where the heater recognizes that the setpoint has been reached and can switch off. Otherwise, the device runs continuously.
For example, if I press my ear to the floor in the bedroom, I can even hear the sound of the tiles...
For example, if I press my ear to the floor in the bedroom, I can even hear the sound of the tiles...
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Eldirwars18 Jan 2024 15:48sysrun80 schrieb:
I have two heating circuits, and no matter how the heating circuit pump is adjusted, I cannot hear any flow noise, regardless of how I set the thermostats (all open, only one per heating circuit, etc.). In my heating circuits, there are also bypass valves installed (I believe this is called a "bypass valve"?) (where you have the two "empty" connections on the far left).
My heating technician said that this "bypass valve" probably prevents flow noise. That sounds very interesting. This could potentially solve the problem. Why wasn’t this installed in my system?
Does anyone have any idea?
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WilderSueden18 Jan 2024 16:12Eldirwars schrieb:
There must be some setpoint where the heating system says, okay, I’ve reached the target and can shut off now. Otherwise, wouldn’t it run constantly? On the one hand, continuous operation at a steady output is actually desirable for a heat pump. However, the heat pump switches off when the return water temperature gets too high because the heating circuits no longer absorb heat. The entire system is designed so that the energy supplied by the heating matches the energy lost through the exterior walls, and with the valves open, the temperature is maintained accordingly.
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