Navien NCB-180 Installation & Operation Manual page 29

3.6.2 System Application - Zone System with Zone Valves
Zone #1
Zone Valve
System Circulator
(Typical)
Air Separator
Expansion Tank
28 Installing the System Piping
Additional Zone
Zone #2
Not to exceed 4 pipe Dia or Max. 12"
System application drawings are intended
Note
●
to explain the system piping concept only.
Refer to 3.4 System Fill Connection on
●
page 25 for make-up fill connections
and refer to the requirements of your local
codes to ensure compliance.
Wiring Diagram
CN23 CN10
Zone1 T/S Zone2 T/S Zone3 T/S Zone4 T/S
<Zone Controller>
Zone1 Pump Zone2 Pump Zone3 Pump Zone4 Pump
<NCB>
CN24 CN25
Common Hot
Zone5 T/S Zone6 T/S
Zone5 Pump Zone6 Pump T/T