[buffalobillpatrick]

Modes of operation:

1. If Solar > 150*F, Solar heats 120 G. Thermal Accumulator/DHW tank.
Solar -> P3, HX -> Solar, HX & P4 -> Thermal Accumulator/DHW tank (120*F),
under control of thermo sensors & Aquastst

2. Boiler heats Thermal Accumulator/DHW tank.
Boiler -> P1, HX, -> boiler, HX & P4 -> Thermal Accumulator/DHW tank (120*F),
under control of Aquastst.

3. Winter, HP uses Solar input (35*-> 90*F) to heat 40 G tank to 100*F.
Solar -> 90*F TMV, P5, HP, P6 -> 40 G tank.
under control of thermo sensors + Microcontroller

4. Winter, 40 G tank provides heat to Radiant floors.
40 G tank -> ODR TMV, P7 -> Radiant floor -> both 3-Way valves energized,
-> 40 G tank.
under control of thermo sensors + Microcontroller + Zone Valve end switches

5. Winter, If Solar > 90*F heats Radiant floors directly (not via HP)
Solar -> ODR TMV, P7 -> Radiant floor -> energized 3-Way valve on right -> Solar
under control of thermo sensors + Microcontroller + Zone Valve end switches

6. Winter, Thermal Accumulator heats Radiant floors.
Thermal Accumulator -> P4 -> HX -> Thermal Accumulator,
Note: heat flows out of Thermal Accumulator in reverse direction through HX
P2 picks up heat from HX
via close T's -> ODR TMV, P7 -> Radiant floor ->both 3-Way valves normal, -> close T
under control of thermo sensors + Microcontroller + Zone Valve end switches