We have a groundwater heat pump, an electric heating element for hot water, and a 10 kW solar system with a 25 kWh (27 kWh) battery storage.
Now in winter, the solar system produces practically nothing. The electricity demand is supplied from the grid.
The system shows the daily electricity consumption.
What I don’t understand about these curves is the electricity demand around 4:00 AM. At that time, we are sleeping, and except for the heat pump, no electricity should be needed. I am not aware of any timer switch that turns anything on at that time.
What could that be?
Best regards,
Bernd
Now in winter, the solar system produces practically nothing. The electricity demand is supplied from the grid.
The system shows the daily electricity consumption.
What I don’t understand about these curves is the electricity demand around 4:00 AM. At that time, we are sleeping, and except for the heat pump, no electricity should be needed. I am not aware of any timer switch that turns anything on at that time.
What could that be?
Best regards,
Bernd
Great job!
@marienschatten Take a look under
8.3 Thermal Disinfection
@marienschatten Take a look under
8.3 Thermal Disinfection
A start time is specified for thermal disinfection. Once thermal disinfection begins, the system immediately tries to reach the set temperature. The selection of the hot water generators used for this depends on the operation mode of the heat pump system, its configurations, and the current system status. Thermal disinfection ends once the set temperature is achieved. To enable the thermal disinfection settings menu, a bivalent heating system and/or flange heating must be set to “Yes” in the pre-configuration.
I don’t want to take credit for someone else’s work—@Musketier found the PDF. I just searched for keywords and did some reading myself. However, after further searching, I don’t think this is the user manual for the operation of the heat exchanger.
The menu item for the night setback, which @marienschatten showed us, is not in the manual. Nevertheless, the thermal disinfection or legionella program is an important clue as to what might still be causing the issue.
So, @marienschatten, check your user manual for that function. If it also has a scheduler (which, if set to daily, could be harmful to consumption), that might be the cause.
The menu item for the night setback, which @marienschatten showed us, is not in the manual. Nevertheless, the thermal disinfection or legionella program is an important clue as to what might still be causing the issue.
So, @marienschatten, check your user manual for that function. If it also has a scheduler (which, if set to daily, could be harmful to consumption), that might be the cause.
M
marienschatten21 Dec 2023 06:56The heat pump heats the water up to a maximum of 40°C (104°F), which is not sufficient for disinfection. The electric heating element is limited to 55°C (131°F).
As suggested, I set a night setback. This actually caused a change in the curve.
So, my problem seems to be related to that after all. Since there was no night setback set before, something is wrong with the control system. I am now scheduling an appointment with the heating technician. They will either reconfigure the entire control system or replace it completely. Then, finally, there will be peace and unwanted electricity consumption will be prevented.
Thank you again for all the efforts to help me. I really appreciate it.
Merry Christmas and a Happy New Year 2024!
Bernd
As suggested, I set a night setback. This actually caused a change in the curve.
So, my problem seems to be related to that after all. Since there was no night setback set before, something is wrong with the control system. I am now scheduling an appointment with the heating technician. They will either reconfigure the entire control system or replace it completely. Then, finally, there will be peace and unwanted electricity consumption will be prevented.
Thank you again for all the efforts to help me. I really appreciate it.
Merry Christmas and a Happy New Year 2024!
Bernd
Tolentino schrieb:
There is no menu item for the night setback, which @marienschatten showed us, in the manual.
Take a look at page DE-12 in the document. There you will find the night setback option. Since there appear to be several heating circuits, it could also be that the night setback is activated in HC 2 or 3. (Pages DE-13 and DE-14)