Note:
Domestic water heating applications with steam supply pressure greater than 15 psi require a steam pressure reducing valve to be installed in the incoming steam supply line prior to the heat exchanger shell. Furthermore, if the supply steam pressure exceeds the pressure rating of the heat exchanger shell then a pressure safety relief valve must be installed in line after the reducing valve.

1. Cold water enters via the inlet piping and branches off to supply both the cold port on the blending valve and the heat exchanger.
2. The cold water passes through the coils in the heat exchanger and is heated by the surrounding steam in the shell.
3. Hot water exits the heat exchanger and enters the hot port on the blending valve.
4. The plug assembly in the blending valve opens the hot and cold ports to provide the precise amount of hot and cold water in order to achieve the desired output temperature water ±4 ^oF.
5. The heated water exits the unit at the base of the blending valve.