I would have thought that this could further increase the flow rate.
And the purpose would be? You will have a standard UPM3 15-75 pump installed which is controlled via PWM. The signal then comes from the heating system. You can (and must) not change anything there anyway. Without the appropriate signal, the pump will not run, and the heating system decides for you how fast it should run. There is no need to fiddle or adjust anything.
The high volume flow rate that I keep demanding for systems with heat pumps cannot be applied to your system with a gas heating. Therefore, if it gets warm, everything is fine and you don't need more volume flow.
Roughly it goes like this:
Shut down Err
Turn all Taco valves fully open
Run 24
Now all rooms will probably be too warm
Now the heating curve is lowered, always only in the smallest step.
Wait 24 hours
This is done until the first room is too cold.
Now, in the rooms that are still too warm, the flow is reduced in the smallest steps via the Taco valves until the temperature is right.
Always only one room at a time and wait 24 hours after each change.
Attention each change affects more or less strongly all other rooms, therefore document every step and check all rooms.
WARNING, solar gains can distort the result.
Therefore, only work under overcast skies and wait for low temperatures so that the heating runs through.
I am currently doing the hydraulic balancing as well, but didn’t you forget in your instructions to set the HUP in the heat pump to maximum power (100%) and only after the hydraulic balancing is completed to set the HUP / circulation pump back to automatic? Because otherwise the automatic mode of the HUP also distorts the heat quantities in the individual rooms, right?