Navien NaviCirc Installation And Operation Manual page 53

Push button
contact signal
Temperature Sensor**
Return Water
Push button
contact signal
NaviCirc
* The Hotbutton kit and
external pump connector
are not included with the
water heater but they are
available for purchase. For
more information about
connecting the external
pump to the water heater,
refer to "2.5.1 External
Pump Wire Connection"
on page 42.
** When the optional
temperature sensor
is installed, it must be
insulated. The sensor wire
may be extended by up to
100 ft (30 m) using 22AWG
wire.
53