More installation details

[AndyAnka]

Hi! Is it possible to publish more installation details about the relay connection, temp sensor connection to heat water, witch externa port is used? I’m very intressested to setup a similar installation with my IVT HE-E14.
/Anders

[QAnders]

Do you mean on the RaspberryPI, or in the heatpump?

In the heatpump, you'll need to find you manual (unless one of the ones I link to in the ReadMe is correct), and then find the PEL card and connections B11 or B12. The actual connections are named something like 10-c, or similar, and the same number/letter combination is found on the actual terminals on the PEL card inside the pump.
You normally need to remove the "high voltage" cover to see the PEL card.

As for RaspberryPI, the temperature sensors is a normal 1-wire setup and a good tutorial can be found online, e.g.:
https://eng.libretexts.org/Courses/University_of_Arkansas_Little_Rock/IFSC_4399_-_The_Internet_of_Things_(IoT)/Setting_up_the_1-wire_interface_for_the_RPi
or
https://tutorials-raspberrypi.com/raspberry-pi-temperature-sensor-1wire-ds18b20/

1-wire needs to be connected on GPIO 4 (physical pin 7)!

The relay card is much simpler, it needs 5V power (and ground) and then any GPIO pin that you can change in the Node-Red setup for the GPIO for the relay board.

[AndyAnka]

Ok! I have a similar setup with Fibaro smart implant to control B11 och B12. From my experience it is not possible to block the heat water production and keep the radiator water circulation as long the heat water temperature is enough high. Blocking heat water production will immefiatly affect radiator water?!
I thought you used the temperature sensor in the heat pump but it is used for room temperature?

[QAnders]

Not sure I understand what you mean by "heat water" (varmvatten?) but you can block different things using External 1 and External 2 and then of course you need to use two separate relays for them.

In my version (which is not online here) I have a "room temperature" sensor which I can chose to override the price. If it becomes colder than 17 degrees C inside I will allow the heatpump to run until it reaches 18 degrees C. Same with warm water, if it drops below 40 degrees C, I let the heatpump run for it to reach 55 degrees C.

[AndyAnka]

I have connected B11 and B12 to the two externa input in the Fibaro smart implant. B11 for blocking varmvattenproduktion and B12 for blocking värme. I made several tests last year in october and found out when blocking varmvattenproduktion directly also affected the värme. 65 degrees varmvatten tank should be enough to produce värme for the radiators for long time, of course depending on the outdoor temperature. Have you other experiences?