Set a value for ID_WEB_Setpoint_TRL_HZ

[tweaker24]

I would like request a feature to be able to set a value for ID_WEB_Setpoint_TRL_HZ.

The value is the setpoint for the returning heating water. Normally the value is calculated by the heat pump using the outside temperature (heating curve). Therefor it is a sensor and not a value you can change.

I would like to set this value to control the heat input of my house indepent of the temperature outside. The value can be set in the heat pump after a heating control setting is changed to not use the outside temperature for the calculation of the setpoint but instead a fixed value.

The value can be set using the heatpump controller webpage (remote).

[BenPru]

Can you provide a screenshot of the input in the webpage? This integration works with the socket interface and not the web interface of luxtronik. The calculated value is located in calculation.ID_WEB_Sollwert_TRL_HZ 12. In params exists parameter.ID_Sollwert_TRL_HZ_AHZ 79. But this param is allways 0.0 in my case.

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To force a high flow_out_temperature_target I overwrite the following values with an automation:

number.*_heating_hysteresis = 0.5
number.*_heating_circuit_curve1_temperature = 70
number.*_heating_circuit_curve2_temperature = 35
number.*_heating_target_correction = 5.0

[tweaker24]

After I log in the webpage I can change the access to installer (password 9445). You can use the remote in the webpage to go to service - settings - system settings - control HC Normally it would be on "OT regul." but if you set it to "fix temp" the outside temperature (heating curve) is ignored. Alternatively you can change the control HC setting in the webpage - settings - system settings - control HC (if you have installer access):

In the webpage I cannot change the return target temperature unfortunately. With the remote you can change the return temperature under heating - heating curves:

In HA it matches with "sensor.luxtronik_330316_0161_flow_out_temperature_target".

After forcing a high flow out temperature target, how do you regulate the amount of heating? I have used the "electrical_power_limitation_value" to limit the amount of power but it was not optimal with the production of hot tap water needing more power.

I don't have a thermostat for the heat pump. I'm looking for a method to automate the heating using an indoor temperature sensor and using mostly solar power for heating.

[BenPru]

@tweaker24 Great input. Thank you. I have added a new number setting in the branch 482-heating_control_circuit_mode-set-heating_flow_out_temperature_target. For me this works fine. Please try it in your setup.

After forcing a high flow out temperature target, how do you regulate the amount of heating?

Not at all. My Novelan LAD 7 air source heat pump always consumes a constant 2 kW of instantaneous power for heating, regardless of what target temperature I set.

[AJediIAm]

I recall reading that the temperature differences shouldn't be too much to avoid thermal stress. If this is true (which I'm not sure about), does this feature have risk of damaging the system or will the heat pump protect itself?

[BenPru]

does this feature have risk of damaging the system or will the heat pump protect itself?

No. See param 87 ID_Einst_TRBegr_akt. Here is the max. Temp for this value. And the integration can set 120 C° but the max used value comes from param 87. The same as you set it on the panel.

And in my case the heating_flow_out_temperature_target is irrelevant. My heatpump allways works the same way. Only if the target is reached, the heatpump shuts down.

[tweaker24]

@BenPru Does your heat pump not have modulation? Can you limit the electric power to 1 kW (while it is running to test if the modulation works?

I installed the branch and it works well. The sensor follows nicely when the heating is on. When the heating is off the value goes to 18 degrees (the set minimum). Now I can further try to make my own thermostat based on available solar power and indoor temperature. Thank you so much.

During installation I received a small error about a missing closing curly bracket in end of the translations\en.json

[BenPru]

@tweaker24

Does your heat pump not have modulation?

No

translations\en.json

Is fixed.

[BenPru]

@tweaker24 I have added a select to configure P0103_HEATING_CONTROL_CIRCUIT_MODE. Can you have another look?