I have been asked to provide a wiring centre for a combi boiler providing hot water to two showers a 300 litre hot water tank and central heating. The heating engineer says he is going to provide two two valves. I'm just a little confused as to how the thermostat on the tank will call for the water to be heated. I thought with a combi it relied on water being used, it then provided instant hot water. So I can't see how if the tank cools down how it is going to call for heat, unless its plumbed into the central heating.
Has anyone dealt with this before?
Has anyone dealt with this before?