The hydraulic separator hydraulically decouples the primary circuit of the heat pump from the building's secondary circuits.
Why it is used
It helps when there are different flow rates, multiple circulators, or several zones with independent operation.
Advantage
It allows the heat pump to maintain the minimum required flow regardless of how many zones are open.
Potential disadvantage
If not sized and adjusted correctly, it can create temperature mixing and reduce efficiency.
Selection
It is not mandatory in every installation. It is used when the hydraulic configuration requires it.