UFH - Buffer tank piping

[john0wingnut]

Hi all

 

with reference to the attached schematic, which is for my UFH / DHW setup with an air source heat pump,  am I right in thinking that the return to the HP should be from the buffer tank, rather than T off from the UFH return, as with it this way you don’t have hydraulic separating and if the UFH pump and HP pumps are running at different speeds it won’t work properly.

Or is if fine as it is?

[PeterW]

UFH manifold pump will be pulling a subset of the HP flow as it will only take full hot flow when the temperature of the flow is required to be increased.