Navien NaviCirc Installation And Operation Manual page 46

8. Locate the 10-switch DIP (SW1) on the front panel and turn on
the proper switches based on the desired recirculation setting
(see Recirculation Dipswitch Settings below).
ON
1
[NPN-160U/180U/199U]
[NPN-120E/160E/180E/199E]
46
2 3 4 5 6 7 8 9
ON
1 2 3 4 5 6 7
ON
10 1 2
8 9 10