Navien NHB H Series Installation And Operation Manual page 38

With 24VAC Connections
(250V 3.15A)
CNC1 CNC4
ZONE3 ZONE2
Thermostat 3 Thermostat 2
If the DHW Tank is connected to the priority terminal, the T/S Zone 1 input is not available.
Note
38 Installing the System Piping
CNC5 CNC6 CNC3
ZONE1 DHW
LWCO
Thermostat 1
DHW Aquastat
(priority)
CNB1
CON1
L
ZONE3 Pump FUSE
(250VAC_10A)
ZONE2 Pump FUSE
(250VAC_10A)
CNV3 CNV2 CNV1
ZONE2 ZONE1
ZONE3
ZONE1 Pump FUSE
(250VAC_10A)
CNC2
Boiler Pump FUSE
(250VAC_10A)
Pump Ground
CNA1
CON2
N
Live
Neutral
OUT
Zone Pump 3
IN (max. 2.5 A)
OUT
Live
IN
Neutral
OUT
Zone Pump 2
(max. 2.5 A)
IN
CNG1 CNF1
Live
CNP1
Neutral
DHW Pump
(max. 2.5 A)
OUT
Live
IN
Neutral
CNP2
Boiler Pump
(max. 2.5 A)
IN