He pipes it up as shown below. All flow to the
distribution system supplying several radiant panel manifolds passes through
the three-way thermostatic mixing valve. When purchasing the boiler, the
installer was told to use a pair of closely spaced tees to separate the boiler
and distribution system, so he installed some closely spaced tees as
shown.
Exercise:
Can you spot at least four things that should be changed in this layout?