Navien NFB-175 Mode D'emploi page 44

When connecting the DHW Tank Sensor
The Navien Universal Temperature sensor can be used as a DHW
Tank Sensor. When installing the Universal Temperature sensor to
the boiler, follow these guidelines:
This sensor is compatible for use with aquastat immersion wells.
●
Attach an aquastat immersion well to the DHW tank before
installing the sensor.
When installing the sensor to the tank, verify that the sensor is
●
completed inserted into the immersion well.
Install the included clip on the groove on the immersion well as
●
shown in the illustration.
Insert the wire through the available eyelet on the clip then
●
wrap it around the clip once to fix the sensor to the well.
Complete the installation by connecting the wires to the DHW
●
Tank terminals located on the PCB.
When inserting the sensor into the immersion well,
Note
heat conductive paste can be used to improve thermal
transfer between the two components.
Boiler Pump DHW Pump System Pump
(max. 2.5 A) (max. 2.5 A) (max. 2.5 A)
Use only Navien Universal Temperature sensor.
Note
44 About the Boiler
<NFB>
NC
NO
COM
NC
NO
COM
NC
NO
COM
LWCO
AC24VL
AC24VN
C
W
R
C
W
R
C
W
R
C
SUPPLY RETURN OUTDOOR DHW TANK
W
SUPPLY RETURN OUTDOOR DHW TANK R
Pump Ground
When installing the DHW Tank Sensor
WARNING
Use only the Navien Universal Temperature sensor. The use of
other sensors may result in higher water temperatures than
expected.
NC
COM
LWCO
AC24VL
AC24VN
C
W
R
C
W
R
C
W
R
C
W
R