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Piping Diagram for Basic Installations
Commercial Hybrid
Single Unit Circulation
Note:
Installation must conform to applicable code
and all requirements listed in the installation
manual. Balancing valves, equivalent piping,
pressure gauges, and temperature gauges are
to be used as necessary to ensure proper flow
between units.
Condensate piping shall be CPVC or PVC
material and shall not be smaller than the drain
connection on the appliance.
Components of condensate drainage shall be
CPVC or PVC material. All components shall be
selected for the pressure and temperature
rating of the installation.
Where the drain pipes from more than one unit
are manifolded together for condensate
drainage, the pipe or tubing shall be sized in
accordance with an approved method as
dictated by local codes.
Condensate must be disposed of according to
local codes.
Tank T&P
Pipe T&P to Open Drain
Hot Water Supply Line
Tankless PRV
Building
Circulation
Pump
Demand Duo™ 80
Condensate Drain Line
Pipe Condensate to Open Drain
Building Hot Water
Return Line
(Optional)
3in (75 mm)
minimum
Gas Supply
Cold Water Supply
13
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