range tribune he

just moved to UK. I have range tribune HE heating system. 1. What does the tap circled in red(attached image) do? Should it be on or off? 2. I have two power switches for this, one for regular and one for immersion. Due to the twisted wiring it is very difficult to follow the wires and see which...

Hi, We have a "Range Tribune HE" hot water tank installed in our house, has a long term issue we are facing. It basically drop the pressure at least twice a month. When pressure goes down the water does not heat properly. As a workaround we do pressure manually few time which push the pressure...