Navien NaviCirc - Page 25

25
The following diagram shows the external recirculation ow for
pre-heating:
[External Recirculation Mode using the Recirculation Inlet]
Primary Heat Exchanger
Secondary Heat Exchanger
Buer
Tank
Flow
Sensor
Domestic
Water
Supply
Hot
Water
Supply
Recirculation
Water Supply
Check Valve
Water
Adjustment
Valve
2-Way
Valve
Closed
Circulation Pump