Weather compensation or Using demand control to increase/decrease delivered power according changes of house heatloss due to street weather

[slekhano]

Hi!

I am trying to achieve a following goal: the maximum long run of the compressor with constant delivery of the minimum required power to maintain required temperature. So the COP should be more than 5.0.

I am not using Faikin yet, I am just checking the possibility to use it.

Right now I am using ONECTA and I have configured two internal units to the slowest speed and set demand control to be 40%, these settings allow two internal units (and external unit) run continuously non stop for days (even weeks), using in the average about 0.6KWh of power per hour delivering almost a constant temperature. Except very cold day where delivered power is not enough. Or warm days where units stop sometimes.

Is there any knowledge how changes of demand control affects delivered power for mutli-split units? Does external unit calculate the average of demand control per multiple internal units, or just get the max value of demand control per all internal units?

Does changes of demand control applied non stop? Or require restart of the compressor?

What I am looking for is that Faikin (or some other system, HA, NodeRed) could adjust demand control according external temperature changes to modulate the delivered power to accommodate increased/reduced heat loss of the house so the units could work non stop for weeks.

Best regards,
S