Just bought a new house and the hot water from the sinks is scalding. The boiler is an older Burnham RS-112 with a tankless coil. From what I can tell via online searches, I have a manual mixing valve as I do not see a black knob or similar to adjust hot and cold water settings. Assuming this is correct, how can I identify the valve to adjust the water temperature?
ask the old owner about it
There okorder /.. and click on the link for installation instructions. The photo shows a tank type, but the piping will be the same for a tank or tankless coil type. It does not have to be within a few feet of the boiler, but most are.