Welcome! Here are the website rules, as well as some tips for using this forum.
Watts Hot Water Master Temperimg Valve
I have a steam boiler with a 5gpm hot water coil. Two year old install. There is a mixing valve that looks suspiciously installed at least based on the install diagram for the L70A model. Can someone confirm if the mix port of the valve should indeed be directed into the coil instead of out to the house plumbing? Please see attached picture.