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1. goes to in house water coil
2. return from in house water coil
3. power to pump , thermostat , and blower
4. inlet to potable water coil (inside of furnace)
5. outlet from potable water coil
6. to manual filling valve
7. water suppl to furnace from manual valve
8. optional outdoor hotwater supply
9. drain
10.blower
11.pump
12.thermostat
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