ᐅ Air-to-Water Heat Pump: Icing Up, Noisy, Continuous Operation?
Created on: 29 Nov 2016 13:26
D
dertutnix
Hello,
I am new to this topic and have a few questions:
We are currently in the final phase of building our house and have received our heating system (still connected to construction power). The building is currently being "dried out."
Points that I am not satisfied with at the moment:
1. Unfortunately, the outdoor unit was installed on the house wall and not decoupled as discussed (the plan was to place it on the garage or in front/next to the house). What can still be done to fix this? As is often the case: nothing was documented in writing.
2. What I have noticed: the side vent of the outdoor unit is partially frozen at 8-13°C (46-55°F) or completely iced over at the moment, with temperatures of 6°C (43°F) or lower down to -5°C (23°F). I have not yet seen the defrost function "in action," but I am only on site for a few hours to talk to the contractors or ventilate. In the settings (which I have only briefly looked at), I only see "99% load" and the second heat source is "active" continuously. Is that normal? The room temperature is currently set to 24°C (75°F), and it is around that temperature as well.
3. I find the outdoor unit very loud and I am worried that this might cause issues with my neighbor. For example, I can feel vibrations throughout the house, I can hear the outdoor unit upstairs, and it is not very quiet outside either. The fan runs almost continuously at a high level, and the system rarely slows down. It is annoying.
The plumber has already come and adjusted something (I don’t know what exactly), and the manufacturer’s service has also been on site. So far, it has not helped much.
House information:
KFW55 city villa, 140 sqm (1,507 sq ft), detached, 24cm (9.5 inch) lightweight concrete with 18cm (7 inch) external thermal insulation composite system (ETICS), decentralized ventilation (Inventer), air-to-water heat pump (Weishaupt WWP L 7 AERS with 200-liter (53 gallons) domestic hot water tank), underfloor heating throughout, outdoor unit directly next to the utility room.
I hope you can provide some guidance, as I have been following this forum for a while.
I am new to this topic and have a few questions:
We are currently in the final phase of building our house and have received our heating system (still connected to construction power). The building is currently being "dried out."
Points that I am not satisfied with at the moment:
1. Unfortunately, the outdoor unit was installed on the house wall and not decoupled as discussed (the plan was to place it on the garage or in front/next to the house). What can still be done to fix this? As is often the case: nothing was documented in writing.
2. What I have noticed: the side vent of the outdoor unit is partially frozen at 8-13°C (46-55°F) or completely iced over at the moment, with temperatures of 6°C (43°F) or lower down to -5°C (23°F). I have not yet seen the defrost function "in action," but I am only on site for a few hours to talk to the contractors or ventilate. In the settings (which I have only briefly looked at), I only see "99% load" and the second heat source is "active" continuously. Is that normal? The room temperature is currently set to 24°C (75°F), and it is around that temperature as well.
3. I find the outdoor unit very loud and I am worried that this might cause issues with my neighbor. For example, I can feel vibrations throughout the house, I can hear the outdoor unit upstairs, and it is not very quiet outside either. The fan runs almost continuously at a high level, and the system rarely slows down. It is annoying.
The plumber has already come and adjusted something (I don’t know what exactly), and the manufacturer’s service has also been on site. So far, it has not helped much.
House information:
KFW55 city villa, 140 sqm (1,507 sq ft), detached, 24cm (9.5 inch) lightweight concrete with 18cm (7 inch) external thermal insulation composite system (ETICS), decentralized ventilation (Inventer), air-to-water heat pump (Weishaupt WWP L 7 AERS with 200-liter (53 gallons) domestic hot water tank), underfloor heating throughout, outdoor unit directly next to the utility room.
I hope you can provide some guidance, as I have been following this forum for a while.
Bautraum201515 Dec 2016 12:43We were explicitly told that if the heating system is properly adjusted, there is no need to adjust the individual room thermostats. The system is too slow for that. According to our heating technician, the thermostats are actually of no real use.
Hello,
this all sounds really bad.
Questions:
No heating element should be running at temperatures above zero degrees Celsius (32°F); something is clearly wrong!
Best regards,
Andreas
this all sounds really bad.
Questions:
- Have you had a professional heating technician come and properly adjust the heating system? Without that, it won’t pass inspection and you won’t get paid for it. Hopefully, the heating system hasn’t been paid for yet. Tell them you will deduct the absurd electricity consumption from the invoice. That’s what I would actually do!
- Is there enough refrigerant in the system?
- What does the heat load calculation say? Maybe the unit is simply three sizes too small?
No heating element should be running at temperatures above zero degrees Celsius (32°F); something is clearly wrong!
Best regards,
Andreas
Reading correctly helps:
Let them come again and fix it. Without it running properly, no acceptance, no payment!
Best regards,
Andreas
dertutnix schrieb:
The plumber has already been here and fixed something (no idea what), and the manufacturer’s customer service as well.
Let them come again and fix it. Without it running properly, no acceptance, no payment!
Best regards,
Andreas
D
dertutnix30 Dec 2016 19:53So, the settings have been adjusted (room temperature, heating circuit, flow temperature, and hot water). Currently, we need about 20-30 kW per day depending on the outside temperature (-5 to +10°C / 23 to 50°F). We now have regular heat pump electricity, which is about 30% cheaper than the temporary construction power. Hot water is connected, and I have more access to data (“installer mode”) since I was supervising it... I will now monitor everything and research what it all means...
The outdoor unit still has a freezing problem, and the issue is being addressed... so it remains and will stay exciting...
The outdoor unit still has a freezing problem, and the issue is being addressed... so it remains and will stay exciting...
K
Knallkörper30 Dec 2016 19:59It would be great if you could keep us updated!
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