Navien NHB-055 Installation & Operation Manual page 35

3.6.8 Wiring Diagram - Optional Supply/Return Temperature Sensors
Refer to "6.1 PCB DIP Switches" on page 48 to control the boiler supply or return water temperature using the external
Note
temperature sensors, and set the DIP switches accordingly.
CN10 CN12
T/T T/T
CH DHW
Temperature sensor
Cable tie
Thermal insulation
<NHB>
CN24 CN25 CN29 CN30
System
AC24V System
LWCO
Supply
Return
Output
Temp.
Temp.
(optional)
(optional)
Installing the System Piping 35