Pressure drop in the hydraulic network: how it affects the heat pump

Pressure drop increases as flow rate grows and as more components are added to the circuit.

Main sources

Pipes, elbows, filters, valves, heat exchangers, and manifolds.

What causes high pressure drop

The circulator pump may fail to achieve the required flow rate, resulting in a large ΔT or a low flow alarm.

Correct diagnosis

Differential pressures and actual flow rate are measured, not just the nominal pump power.