Article reference KA-01790
It is not permitted to use a secondary return on an Edel hot water heat pump. This is because it will significantly increase compressor run hours, reduce recovery times significantly and potentially prevent the cylinder reaching the desired set temperature if the secondary return has too high a thermal loss to it.
Applicable Models:
EDL170-520, EDL170-520RF, EDL200UK-630, EDL200UK-630RF, EDL270UK-630, EDL270UK-630RF