Navien NaviCirc Installation And Operation Manual page 38

External Recirculation with HotButton (Optional) and NaviCirc
Expansion Tank
Set the 2-way valve inside the water heater to the
Note
●
"Ext" position when using the NaviCirc recirculation
valve.
It is not necessary to install bypass piping from the
●
cold line to the recirculation inlet fitting for NPE-A2
models.
NPE-A2 Water Heater
Ball
Valve
[NPE-180A2/210A2/240A2]
HotButton
Kit*
DHW Supply
City Water Supply
38
Wired Push Button*