Navien NFB Series User Manual

45Installing the System Piping
3.6.11 Wiring Diagram - Optional Supply/Return Temperature Sensors
SUPPLY RETURN OUTDOOR DHW TANK
R
W
R
W
C
R
W
C
Temperature sensor
Thermal insulation
<NFB>
Cable tie
Note
To control the boiler supply or return water temperature using the external temperature sensors, configure the system accordingly.
On the front panel, press the Menu button (
) to enter the setting menu, and then select 3. Space Htg Operation > 4. SH Control
Method to select one of the control modes.

Navien NFB Series Specifications

General

Type	Condensing Boiler
Fuel Type	Natural Gas or Propane
Heat Exchanger	Stainless Steel
Vent Type	Direct Vent
Vent Diameter	2" or 3"