Navien NHB-055 Installation & Operation Manual page 34

3.6.6 Wiring Diagram - Air Handler
<Air Handler>
Thermostat
If you are using the navien manifold system, connect the pump
wires to the system pump. If you are not using the navien manifold
system, connect the pump wires to either the system pump or the
boiler pump.
System Pump
(max 2A)
34 Installing the System Piping
<NHB>
CN10 CN12 CN24 CN25 CN29 CN30
System
System
T/T T/T AC24V
LWCO Supply
Return
CH DHW Output
Temp.
Temp.
(optional)
(optional)
<NHB>
CN28 CN18 CN26
System Boiler DHW
Pump Pump Pump
Boiler Pump
(max 2A)
3.6.7 Wiring Diagram - DHW System with Indirect
Tank
CN10
T/T
CH
DHW Priority
Zone1 T/S Zone2 T/S Zone3 T/S
Generic Zone Controller
Zone1 Valve Zone2 Valve Zone3 Valve Zone4 Valve
<NHB>
System Pump
(max 2A)
<NHB>
CN12 CN24 CN25 CN29 CN30
System
T/T AC24V System
LWCO Supply
Return
DHW Output
Temp.
Temp.
(optional)
(optional)
Indirect Tank T/T
Zone4 T/S Zone5 T/S Zone6 T/S
Zone5 Valve Zone6 Valve T/T
CN28 CN18 CN26
System Boiler DHW
Pump Pump Pump
Boiler Pump DHW Pump
(max 2A) (max 2A)