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Thanks ScottishGasMan As you may know there has been a shortage of VR70/71s so I have just got my hands on one. I have now set the system up and it is all working except I can’t get the DHW working fully. As mentioned above I have 2 separate hot water cylinders, each with its own thermostat...

Hi All I'm looking for some views as to whether to opt for the consumer Vaillant boiler controls (VRC 720 plus VR71) or the commercial controls (VRC 630). I have the following set-up: - two Vaillant EcoTec Plus 630 boilers - two hot water cylinders (vented) - each with a separate zone...