David, Usually hot water temperature that is elevated above design temp is called temperature "Creep". It is commonly seen when the recirc. return line is not correctly piped back to the mixing valve and heater or when the system is not balanced correctly.
David, Usually hot water temperature that is elevated above design temp is called temperature "Creep". It is commonly seen when the recirc. return line is not correctly piped back to the mixing valve and heater or when the system is not balanced correctly.