Navien NPE-180A2 Installation Manual page 35

External Recirculation with HotButton and NaviCirc
NPE-A2 Water Heater
HotButton Kit
Ball
Valve
Expansion Tank
City Water Supply
Set the 2-way valve inside the water heater to the "Ext" position when using the NaviCirc
Note
●
recirculation valve.
It is not necessary to install bypass piping from the cold line to the recirculation inlet fitting for
●
NPE-A2 models.
NPE-S2 Water Heater
Ball
Ball
Valve
Valve
External
Pump
Expansion Tank
City Water Supply
* The NaviCirc recirculation valve, the push buttons, and the temperature sensor are not included with the water heater but are
available for purchase.
Wired Push Button*
[NPE-180A2/210A2/240A2]
HotButton Kit
Wired Push Button*
[NPE-150S2/180S2/210S2/240S2]
Wired Push Button*
Temperature
DHW Supply
Return Water
Wired Push Button*
DHW Supply
Return Water
Wired Push Button*
Flexible Hoses
NaviCirc*
Flexible Hoses
Sensor*
Wired Push Button*
NaviCirc*
Temperature
Sensor*
Installing the Water Heater 35