44 About the Boiler
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.
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.
Note
When inserting the sensor into the immersion well,
heat conductive paste can be used to improve thermal
transfer between the two components.
<NFB>
System Pump
(max. 2.5 A)
Boiler Pump
(max. 2.5 A)
DHW Pump
(max. 2.5 A)
COM
NO
NC
ZONE1
COM
NO
NC
ZONE2
COM
NO
NC
ZONE3
AC24VN
SUPPLY RETURN OUTDOOR DHW TANK
AC24VL
LWCO
R
W
C
R
W
C
R
W
C
R
W
C
COM
A/H DHWPRI
NO NC N L N L
N
L
COM NO NC N L N L
N
L
Pump Ground
SUPPLY RETURN OUTDOOR DHW TANK
R
W
C
R
W
C
R
W
C
R
W
C
Note
Use only Navien Universal Temperature sensor.
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