I have a Vaillant system comprising Ecotec System Boiler, Unistor unvented system, and VR 65 control unit with NTC connection to the cylinder.
By default the boiler is set to give priority to hot water requests (thus closing the CH valve) but this can be changed to allow both heating and hot water at the same time, which I would prefer. Are there any drawbacks to this.
many Thanks
Geoff Atkinson
By default the boiler is set to give priority to hot water requests (thus closing the CH valve) but this can be changed to allow both heating and hot water at the same time, which I would prefer. Are there any drawbacks to this.
many Thanks
Geoff Atkinson