Daniel-Sp
2023-01-09 15:29:31
- #1
Hello
I finally managed to take a look at the data. The operating pattern of the heat pump is good. You have 22 compressor starts in 2 days. That is good for the size of the heat pump in relation to your house. The only noticeable thing is the frequent domestic hot water production during the day. This is due to the continuous circulation during the day, which empties your hot water storage tank. A limitation would be a matter of comfort but would also save some costs.
Unfortunately, I cannot give an all-clear. During the domestic hot water production at about 2°C outside temperature, you have a maximum discharge gas temperature of just under 108°C. During the recording, the maximum discharge gas temperature was 109.1°C. In January 2021, at comparable outside temperatures, you had a maximum discharge gas temperature of about 85°C. I fear that at significantly lower temperatures the heat pump will again have problems with too high discharge gas temperatures during domestic hot water operation.
What can be done? Not much. Control parameters to protect the system would be:
- Reduction of the domestic hot water set temperature to the lowest acceptable temperature. In 2021 you had a target temperature of 49°C, now you are at 50.5°C. Every degree lower helps. Maybe 48 or 48.5°C would also work?
- Reduction of the circulation. This reduces the number of domestic hot water cycles and thus protects the heat pump.
- Keep an eye on the maximum discharge gas temperature as outside temperatures fall and, if necessary, switch domestic hot water production to the electric heating element. If you load the DTA into OpenDTA, you can easily read the maximum discharge gas temperature in the statistics tab.
In general, there have been many recent reports of compressor damage in the LAD series. The other series run very robustly. Of course, there is no detailed information from Novelan/Alpha Innotec. However, if a compressor damage requiring replacement does occur, you should openly discuss this issue with the Novelan customer service. And upon replacement, insist on an acid test of the refrigerant to avoid the next compressor damage after a short time. Further causes could be refrigerant loss or a defective expansion valve. The contact person for discharge gas problems is usually the customer service mediated through the heating installer during the warranty period. As an alternative, a refrigeration specialist company (if available nearby) that also services heat pumps, as they are usually more competent than the heating installer.
Despite everything, have a nice day
I finally managed to take a look at the data. The operating pattern of the heat pump is good. You have 22 compressor starts in 2 days. That is good for the size of the heat pump in relation to your house. The only noticeable thing is the frequent domestic hot water production during the day. This is due to the continuous circulation during the day, which empties your hot water storage tank. A limitation would be a matter of comfort but would also save some costs.
Unfortunately, I cannot give an all-clear. During the domestic hot water production at about 2°C outside temperature, you have a maximum discharge gas temperature of just under 108°C. During the recording, the maximum discharge gas temperature was 109.1°C. In January 2021, at comparable outside temperatures, you had a maximum discharge gas temperature of about 85°C. I fear that at significantly lower temperatures the heat pump will again have problems with too high discharge gas temperatures during domestic hot water operation.
What can be done? Not much. Control parameters to protect the system would be:
- Reduction of the domestic hot water set temperature to the lowest acceptable temperature. In 2021 you had a target temperature of 49°C, now you are at 50.5°C. Every degree lower helps. Maybe 48 or 48.5°C would also work?
- Reduction of the circulation. This reduces the number of domestic hot water cycles and thus protects the heat pump.
- Keep an eye on the maximum discharge gas temperature as outside temperatures fall and, if necessary, switch domestic hot water production to the electric heating element. If you load the DTA into OpenDTA, you can easily read the maximum discharge gas temperature in the statistics tab.
In general, there have been many recent reports of compressor damage in the LAD series. The other series run very robustly. Of course, there is no detailed information from Novelan/Alpha Innotec. However, if a compressor damage requiring replacement does occur, you should openly discuss this issue with the Novelan customer service. And upon replacement, insist on an acid test of the refrigerant to avoid the next compressor damage after a short time. Further causes could be refrigerant loss or a defective expansion valve. The contact person for discharge gas problems is usually the customer service mediated through the heating installer during the warranty period. As an alternative, a refrigeration specialist company (if available nearby) that also services heat pumps, as they are usually more competent than the heating installer.
Despite everything, have a nice day