Navien NHB H Series Installation And Operation Manual 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 completely 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, heat conductive paste can be used to improve
Note
thermal transfer between the two components.
Installing the DHW Tank Sensor
CNC1 CNC4
ZONE3 ZONE2
NOTICE
Use only the Navien Universal Temperature sensor (#GXXX001769). The use of other sensors may result in
higher water temperatures than expected.
44 Installing the System Piping
CNC5 CNC3 CNV3 CNV2
CNC6
ZONE1 DHW
LWCO ZONE3 ZONE2
Pump Ground
<NHB-H>
L
N
ZONE3 Pump FUSE
(250VAC_10A)
ZONE2 Pump FUSE
CNV1
(250VAC_10A)
ZONE1
CNG1 CNF1
CNC2
CNP1
ZONE1 Pump FUSE
(250VAC_10A)
Boiler Pump FUSE
(250VAC_10A)
CNP2
OUT
CNA1
IN
CNX1
Live
Neutral
Live
Live
Neutral
Boiler DHW System
Pump Pump Pump
(max. 2.5 A) (max. 2.5 A) (max. 2.5 A)