Installation Manual

Demand Duo™ R-Series Installation and Operation Manual 35
Single Unit Circulation
Note:
Installaon must conform to applicable codes and all requirements listed in this manual. Balancing valves, equivalent piping, pressure gauges,
and temperature gauges are to be used as necessary to ensure proper ow between units.
All components shall be selected for the pressure and temperature rang of the installaon.
Gas Supply
Cold Water Supply
Tankless PRV
Tank T&P
Pipe T&P to Open Drain
Hot Water Supply Line
Building
Circulation
Pump
Building Hot
Water
Return Line
(Optional)
6 inch. B-Vent
Figure 32