Underfloor heating: correct temperature with heat pump
Before changing any setting, it is necessary to confirm that there is actual flow in the correct loop. This topic concerns the collaboration of underfloor heating with a heat pump at low water temperatures.
In this article, emphasis is placed on the points correct, temperature, and pump, so that the inspection is linked to the actual subject of the title.
What to check first
- Flow rate.
- ΔT.
- Minimum heat pump flow rate.
- Compensation curve.
Sudden changes in flow meters are often associated with air, dirt, or differential pressure changes.
Potential causes or errors
- Frequent cycling.
- Many closed zones.
- Very high setpoint.
- Low flow rate.
Useful measurements
For this specific subject, l/min, COP/SCOP where available, supply °C, and return °C are helpful. Values are compared per loop and with the thermal load of the specific space.
Practical application
In the case of flow noise, differential pressure and excessive flow rates are examined first. Underfloor heating particularly suits a heat pump when it maintains low water temperature and constant flow.
Safety
Before intervening on a manifold, circulator, or piping, safe isolation, temperature check, and pressure relief are performed where required. Electrical measurements on thermostats, actuators, and controllers are performed by a qualified technician. Safety features must not be bypassed.
Conclusion
In "Underfloor heating: correct temperature with heat pump", the correct technical decision is based on the relationship between correct, temperature, and pump, and not on a single indication.