ᐅ Optimization of the LWD 70A Heat Pump with Photovoltaic System
Created on: 3 Sep 2023 16:22
F
Fabian80
Hello everyone,
I’m a layperson and therefore looking for your advice.
I recently installed a 13.9 kWp photovoltaic system and now want to optimize my heat pump settings to work more efficiently with the solar system. It is an LWD 70A Alpha Innotec heat pump.
1) Adjust hot water settings with lockout times, suitable hysteresis and temperature/differential settings, and configure the electric heating element accordingly.
2) Reduce compressor pulses and optimize the heating system accordingly.
I would like to start with point 1, as I think this might be simpler. Do you have any recommendations?
Thank you very much for your help.
Heat Pump Commissioning: 09/03/2023 15:
System Status:
Heat Pump Type LD7
Software Version V2.88.3
Revision 9717
Control Panel 1003
Bivalence Stage 1
Operating Status ----
System Settings:
Utility Lockout without Backup Electric Heater (ZWE)
Room Controller No
Return Integration No
Mixing Circuit 1 No
Mixing Circuit 2 No
Mixing Circuit 3 No
Backup Electric Heater 1 Type: Electric Heating Element
Backup Electric Heater 1 Function: Heating and ...
Backup Electric Heater 1 Power: 6.0 kW
Backup Electric Heater 2 Type: None
Backup Electric Heater 2 Function: None
Backup Electric Heater 3 Type: None
Backup Electric Heater 3 Function: None
Fault without Backup Electric Heater
Domestic Hot Water Sensor 1
Domestic Hot Water Sensor 2 ZIP
Domestic Hot Water Sensor 3 with ZUP
Domestic Hot Water Sensor 4 Setpoint
Domestic Hot Water Sensor 5 with HUP
Domestic Hot Water + Heat Pump max 0.0 h
Pump Optimization Yes
Customer Access
Pressure Monitoring On
Heating Circuit Control Outside Temperature Dependent
Mixing Circuit 1 Control Outside Temperature Dependent
Mixing Circuit 2 Control Outside Temperature Dependent
Mixing Circuit 3 Control Outside Temperature Dependent
Heating with Mixing Circuit No
Electric Anode No
Heating Limit Yes
Parallel Operation No
Remote Maintenance No
Pump Optimization Time 180 min
Pump Efficiency Yes
Heat Quantity Cooling
Solar Control Temperature Differential
TDI Message Yes
Multi-Tank No
Backup Electric Heater Release 60 min
Hot Water Post-Heating No
Hot Water Post-Heating Max 5.0
Smart Grid No
Mixing Circuit 1 Control Fast
Mixing Circuit 2 Control Fast
Mixing Circuit 3 Control Fast
Temperatures:
Return Limitation 50.0°C (122°F)
Hysteresis HR 2.0 K
Max Compressor Boost 7.0
Backup Electric Heater Release -2.0°C (28°F)
Air Temperature Differential 7.0°C (45°F)
TDI Set Temperature 65.0°C (149°F)
Hot Water Hysteresis 2.0 K
Max Outdoor Temperature 40.0°C (104°F)
Min Outdoor Temperature -20.0°C (-4°F)
End Air Temperature Differential 6.0°C (43°F)
Setback down to -20.0°C (-4°F)
Max Flow Temperature 70.0°C (158°F)
Temperature Differential On 4.0 K
Temperature Differential Off 2.0 K
Max Storage Temperature Differential 70.0°C (158°F)
Heating Circuit Temperature Differential 2.0 K
Hot Water Temperature Differential 5.0 K
Min. Outside Temperature Flow Max.
Ground Floor Flow 62.0°C (144°F)
Max Hot Water Temperature 65.0°C (149°F)
Min Return Set Temperature 15.0°C (59°F)
Night Setback Heating Circuit 0.0°C (32°F)
Heating Limit:
Heating Limit 17.0°C (63°F)
Pump Efficiency:
Nominal Pump Efficiency 8.25 V
Minimum Pump Efficiency 8.25 V
Pump Efficiency Yes
Heat Quantity Cooling Priorities:
Domestic Hot Water 1
Heating 2
System Configuration:
Heating 1
Domestic Hot Water 1
Swimming Pool 0
Heating Curve Heating 34.0°C (93°F) 20.0°C (68°F)
Operating Hours Information:
Operating Hours Compressor 1: 5583 h
Compressor Pulses 1: 18619
Average Operating Time Compressor 1: 00:17
Backup Electric Heater 1 Operating Hours: 5 h
Heat Pump Operating Hours: 5583 h
Heating Operating Hours: 4738 h
Domestic Hot Water Operating Hours: 845 h
Temperature Information:
Flow 36.3°C (97°F)
Return 35.2°C (95°F)
Return Setpoint 15.0°C (59°F)
Hot Gas 40.9°C (105°F)
Outdoor Temperature 24.0°C (75°F)
Average Temperature 18.0°C (64°F)
Actual Domestic Hot Water Temperature 48.7°C (119°F)
Target Domestic Hot Water Temperature 48.0°C (118°F)
Heat Source Inlet 26.1°C (79°F)
Solar Collector 5.0°C (41°F)
Solar Storage 150.0°C (302°F)
External Energy Source 5.0°C (41°F)
Max Flow Temperature 70.0°C (158°F)
Compressor Suction 48.9°C (120°F)
Evaporator Suction 34.6°C (94°F)
Compressor Heating 60.5°C (141°F)
Superheating 28.9 K
Target Superheating 8.0 K
Yes = Yes
Shutdowns:
09/03/23 14:05 No Errors
09/03/23 08:21 No Errors
09/03/23 00:50 No Errors
09/02/23 18:35 No Errors
09/02/23 15:33 No Errors
Calibration:
NTC1 0.0
NTC2 0.0
NTC3 0.0
NTC4 0.0
NTC5 0.0
NTC6 0.0
NTC7 0.0
NTC8 0.0
I’m a layperson and therefore looking for your advice.
I recently installed a 13.9 kWp photovoltaic system and now want to optimize my heat pump settings to work more efficiently with the solar system. It is an LWD 70A Alpha Innotec heat pump.
1) Adjust hot water settings with lockout times, suitable hysteresis and temperature/differential settings, and configure the electric heating element accordingly.
2) Reduce compressor pulses and optimize the heating system accordingly.
I would like to start with point 1, as I think this might be simpler. Do you have any recommendations?
Thank you very much for your help.
Heat Pump Commissioning: 09/03/2023 15:
System Status:
Heat Pump Type LD7
Software Version V2.88.3
Revision 9717
Control Panel 1003
Bivalence Stage 1
Operating Status ----
System Settings:
Utility Lockout without Backup Electric Heater (ZWE)
Room Controller No
Return Integration No
Mixing Circuit 1 No
Mixing Circuit 2 No
Mixing Circuit 3 No
Backup Electric Heater 1 Type: Electric Heating Element
Backup Electric Heater 1 Function: Heating and ...
Backup Electric Heater 1 Power: 6.0 kW
Backup Electric Heater 2 Type: None
Backup Electric Heater 2 Function: None
Backup Electric Heater 3 Type: None
Backup Electric Heater 3 Function: None
Fault without Backup Electric Heater
Domestic Hot Water Sensor 1
Domestic Hot Water Sensor 2 ZIP
Domestic Hot Water Sensor 3 with ZUP
Domestic Hot Water Sensor 4 Setpoint
Domestic Hot Water Sensor 5 with HUP
Domestic Hot Water + Heat Pump max 0.0 h
Pump Optimization Yes
Customer Access
Pressure Monitoring On
Heating Circuit Control Outside Temperature Dependent
Mixing Circuit 1 Control Outside Temperature Dependent
Mixing Circuit 2 Control Outside Temperature Dependent
Mixing Circuit 3 Control Outside Temperature Dependent
Heating with Mixing Circuit No
Electric Anode No
Heating Limit Yes
Parallel Operation No
Remote Maintenance No
Pump Optimization Time 180 min
Pump Efficiency Yes
Heat Quantity Cooling
Solar Control Temperature Differential
TDI Message Yes
Multi-Tank No
Backup Electric Heater Release 60 min
Hot Water Post-Heating No
Hot Water Post-Heating Max 5.0
Smart Grid No
Mixing Circuit 1 Control Fast
Mixing Circuit 2 Control Fast
Mixing Circuit 3 Control Fast
Temperatures:
Return Limitation 50.0°C (122°F)
Hysteresis HR 2.0 K
Max Compressor Boost 7.0
Backup Electric Heater Release -2.0°C (28°F)
Air Temperature Differential 7.0°C (45°F)
TDI Set Temperature 65.0°C (149°F)
Hot Water Hysteresis 2.0 K
Max Outdoor Temperature 40.0°C (104°F)
Min Outdoor Temperature -20.0°C (-4°F)
End Air Temperature Differential 6.0°C (43°F)
Setback down to -20.0°C (-4°F)
Max Flow Temperature 70.0°C (158°F)
Temperature Differential On 4.0 K
Temperature Differential Off 2.0 K
Max Storage Temperature Differential 70.0°C (158°F)
Heating Circuit Temperature Differential 2.0 K
Hot Water Temperature Differential 5.0 K
Min. Outside Temperature Flow Max.
Ground Floor Flow 62.0°C (144°F)
Max Hot Water Temperature 65.0°C (149°F)
Min Return Set Temperature 15.0°C (59°F)
Night Setback Heating Circuit 0.0°C (32°F)
Heating Limit:
Heating Limit 17.0°C (63°F)
Pump Efficiency:
Nominal Pump Efficiency 8.25 V
Minimum Pump Efficiency 8.25 V
Pump Efficiency Yes
Heat Quantity Cooling Priorities:
Domestic Hot Water 1
Heating 2
System Configuration:
Heating 1
Domestic Hot Water 1
Swimming Pool 0
Heating Curve Heating 34.0°C (93°F) 20.0°C (68°F)
Operating Hours Information:
Operating Hours Compressor 1: 5583 h
Compressor Pulses 1: 18619
Average Operating Time Compressor 1: 00:17
Backup Electric Heater 1 Operating Hours: 5 h
Heat Pump Operating Hours: 5583 h
Heating Operating Hours: 4738 h
Domestic Hot Water Operating Hours: 845 h
Temperature Information:
Flow 36.3°C (97°F)
Return 35.2°C (95°F)
Return Setpoint 15.0°C (59°F)
Hot Gas 40.9°C (105°F)
Outdoor Temperature 24.0°C (75°F)
Average Temperature 18.0°C (64°F)
Actual Domestic Hot Water Temperature 48.7°C (119°F)
Target Domestic Hot Water Temperature 48.0°C (118°F)
Heat Source Inlet 26.1°C (79°F)
Solar Collector 5.0°C (41°F)
Solar Storage 150.0°C (302°F)
External Energy Source 5.0°C (41°F)
Max Flow Temperature 70.0°C (158°F)
Compressor Suction 48.9°C (120°F)
Evaporator Suction 34.6°C (94°F)
Compressor Heating 60.5°C (141°F)
Superheating 28.9 K
Target Superheating 8.0 K
Yes = Yes
Shutdowns:
09/03/23 14:05 No Errors
09/03/23 08:21 No Errors
09/03/23 00:50 No Errors
09/02/23 18:35 No Errors
09/02/23 15:33 No Errors
Calibration:
NTC1 0.0
NTC2 0.0
NTC3 0.0
NTC4 0.0
NTC5 0.0
NTC6 0.0
NTC7 0.0
NTC8 0.0
B
Benutzer 100115 Sep 2023 14:46Turning it off because hot water preparation is expensive and the circulation pump consumes a lot of energy. However, you have a very good ratio of about 1/4 hot water compared to heating.
The hot water circulation pump in your model is probably located outside the heat pump. You can switch off the pump efficiency setting, as I believe none is installed.
You cannot adjust anything more at the current temperatures; you have to wait for colder days.
Similarly, you can only test the return temperature set to 28°C (82°F) once you know the temperature difference.
Then you can check the hydraulic balancing. I also only deactivated room thermostats in my second or third winter; I didn’t expect it to work without them.
The hot water circulation pump in your model is probably located outside the heat pump. You can switch off the pump efficiency setting, as I believe none is installed.
You cannot adjust anything more at the current temperatures; you have to wait for colder days.
Similarly, you can only test the return temperature set to 28°C (82°F) once you know the temperature difference.
Then you can check the hydraulic balancing. I also only deactivated room thermostats in my second or third winter; I didn’t expect it to work without them.
So you mean "off-topic," my domestic hot water settings are fine as they are?
If I don't have any optimization and everything else is fine, can I leave the hot water settings as they are for now?
46°C (115°F) with a 6K hysteresis?
And the lockout times?
Should I deactivate the electric heating element, or is that okay as is?
Maybe someone with an Alpha Innotec 70A could share their settings for comparison?
Thanks!
If I don't have any optimization and everything else is fine, can I leave the hot water settings as they are for now?
46°C (115°F) with a 6K hysteresis?
And the lockout times?
Should I deactivate the electric heating element, or is that okay as is?
Maybe someone with an Alpha Innotec 70A could share their settings for comparison?
Thanks!
B
Benutzer 100116 Sep 2023 03:03There are still many professionals as well, but I received a warning for mentioning the tip without naming anyone.
B
Benutzer 100118 Sep 2023 20:08| Heat Pump Type;LWC407 | ||
| Software Version;B1.70 | ||
| Bivalent Stage;1 | ||
| Operating Mode;Heating | ||
| System Settings : | ||
| Utility Stop;without auxiliary heater | ||
| Remote Control;No | ||
| Integration;In series | ||
| Mixing Circuit 1;No | ||
| Mixing Circuit 2;No | ||
| Mixing Circuit 3;No | ||
| Auxiliary Heater 1 Type;Electric auxiliary heater | ||
| Auxiliary Heater 1 Function;Heating and domestic hot water | ||
| Auxiliary Heater 2 Type;No | ||
| Auxiliary Heater 2 Function;No | ||
| Auxiliary Heater 3 Type;No | ||
| Auxiliary Heater 3 Function;No | ||
| Fault;without auxiliary heater | ||
| Domestic Hot Water 1;Sensor | ||
| Domestic Hot Water 2;ZIP | ||
| Domestic Hot Water 3;without ZUP | ||
| Domestic Hot Water 4;Setpoint | ||
| Domestic Hot Water 5;with HUP | ||
| Hot Water + Heat Pump Max;0.0 h | ||
| Defrost Cycle Max;60 min | ||
| Air Defrost;Yes | ||
| Air Defrost Max;15 min | ||
| Defrost 2;with 1 compressor | ||
| Pump Optimization;Yes | ||
| Access;Customer | ||
| Compressor Monitoring;On | ||
| Heating Control;Outdoor temperature dependent | ||
| Control Mixing Circuit 1;Outdoor temperature dependent | ||
| Control Mixing Circuit 2;Outdoor temperature dependent | ||
| Control Mixing Circuit 3;Outdoor temperature dependent | ||
| Screed Drying;without mixing | ||
| External Current Anode;No | ||
| Heating Limit;Yes | ||
| Parallel Operation;No | ||
| Outdoor Temperature Exceedance;12.0 h | ||
| Outdoor Temperature Underrun;12.0 h | ||
| Pump Post-Run Time;5 min | ||
| Nominal Efficiency Pump;6.50V | ||
| Minimum Efficiency Pump;3.00V | ||
| Efficiency Pump;Yes | ||
| Amount of Heat ;V 5-100 | ||
| Solar Control;Temperature differential | ||
| Defrost Cycle Min;45 min | ||
| TDI Notification;No | ||
| Multi-Storage;No | ||
| Temperatures : | ||
| Max. Return Temperature;45.0°C (113°F) | ||
| Hysteresis HR;2.0 K (3.6°F) | ||
| Max. Temperature Difference TR;7.0 K (12.6°F) | ||
| Auxiliary Heater Activation;–2.0°C (28°F) | ||
| Air Defrost Temperature;7.0°C (45°F) | ||
| TDI Setpoint Temperature;65.0°C (149°F) | ||
| Domestic Hot Water Hysteresis;6.0 K (10.8°F) | ||
| Maximum Outdoor Temperature;35.0°C (95°F) | ||
| Minimum Outdoor Temperature;–20.0°C (–4°F) | ||
| Maximum Heating Gas Temperature;140.0°C (284°F) | ||
| End Air Defrost Temperature;6.0°C (43°F) | ||
| Lowering Limit to;–20.0°C (–4°F) | ||
| Maximum Flow Temperature;61.0°C (142°F) | ||
| Temperature Difference On;4.0 K (7.2°F) | ||
| Temperature Difference Off;2.0 K (3.6°F) | ||
| Maximum Storage Temperature Difference;70.0°C (158°F) | ||
| Heating Temperature Differential;2.0 K (3.6°F) | ||
| Domestic Hot Water Temperature Differential;5.0 K (9.0°F) | ||
| Minimum Ambient Temperature for Flow Max.;–7.0°C (19°F) | ||
| Ground Floor Flow Temperature;60.0°C (140°F) | ||
| Maximum Domestic Hot Water Temperature;65.0°C (149°F) | ||
| ; | ||
| Priorities : | ||
| Domestic Hot Water;1 | ||
| Heating;2 | ||
| System Configuration : | ||
| Heating;1 | ||
| Domestic Hot Water;1 | ||
| Swimming Pool;0 | ||
| Heating Curves Heating;25.5°C (78°F);21.5°C (71°F);0.0 K (0°F) | ||
| Operating Hours Information : | ||
| Operating Hours Compressor 1;1584 h | ||
| Compressor 1 Impulses;1949 | ||
| Average Running Time Compressor 1;00:48 | ||
| Operating Hours Auxiliary Heater 1;0 h | ||
| Operating Hours Heat Pump;1584 h | ||
| Operating Hours Heating;1062 h | ||
| Operating Hours Domestic Hot Water;522 h | ||
| Temperature Information : | ||
| Flow Temperature;23.5°C (74°F) | ||
| Return Temperature;23.5°C (74°F) | ||
| Return Temperature Setpoint;27.5°C (82°F) | ||
| Heating Gas Temperature;25.1°C (77°F) | ||
| Outdoor Temperature;0.6°C (33°F) | ||
| Average Temperature;0.1°C (32°F) | ||
| Actual Domestic Hot Water;45.1°C (113°F) | ||
| Domestic Hot Water Setpoint;48.0°C (118°F) | ||
| Heat Carrier Inlet;2.4°C (36°F) | ||
| Heat Carrier Outlet;0.1°C (32°F) | ||
| Flat Collector;5.0°C (41°F) | ||
| Solar Storage;150.0°C (302°F) | ||
| External Auxiliary Heater;5.0°C (41°F) | ||
| Maximum Flow Temperature;61.0°C (142°F) | ||
| Yes = Yes | ||
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