sharpener Posted February 8 Share Posted February 8 The usual Vaillant configuration for DHW shows a diverter valve (9g below) which is energised for the DHW position. There are also separate two-port valves 9b for the heating circuits: But I already have a two-port valve for the HW coil in an S-plan setup so I am wondering if I can keep this instead. It would seem to depend on whether the controller de-energises the heating valves (9b) when there is a demand for HW, it seems likely but can anyone confirm this? TIA Link to comment Share on other sites More sharing options...
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